California Air Toxics “Hot Spots” Program AB2588 Health Risk Assessment For RMC Pacific Materials dba CEMEX Davenport, California

prepared for:

CEMEX

October 2007

prepared by: Sierra Research, Inc. 1801 J Street Sacramento, California 95811 (916) 444-6666

INDUSTRY CONTACT INFORMATION SHEET

2006 AB2588 AIR TOXICS RISK ASSESSMENT

SUBMITTAL DATE: October 2007 SUBMITTED BY: Name of Company: CEMEX Address of Company: 700 Highway 1 Davenport, CA 95017 Company Contact Person: Duane Cannon, Environmental Manager Telephone Number: (831) 458-5709 Email: duane.cannon@cemex.com Consultant Company: Sierra Research Mailing Address: 1801 J Street Sacramento, CA 95811 Consultant Contact Person: Steve Hill Telephone Number: 916-444-6666 Email: shill@sierraresearch.com SUBMITTED FOR: Facility Name: CEMEX Facility Address: 700 Highway 1 Davenport, CA 95017 Signature of Responsible Person: _________________________________ Name and Title of Responsible Person: Duane Cannon, Environmental Manager Date Signed: October 29, 2007

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CALIFORNIA AIR TOXICS “HOT SPOTS” PROGRAM AB2588 HEALTH RISK ASSESSMENT FOR CEMEX

DAVENPORT, CALIFORNIA

Table Of Contents Page

INDUSTRY CONTACT INFORMATION SHEET........................................................... i Table of Contents................................................................................................................ ii

1. INTRODUCTION ......................................................................................................... 1

1.1 The Air Toxics “Hot Spots” Act.............................................................................. 1 1.2 Risk Assessment ...................................................................................................... 1 1.3 Facility Information ................................................................................................. 2 1.4 Community Information (Sensitive Receptors) ....................................................... 5

2. EXECUTIVE SUMMARY ........................................................................................... 6

2.1 Facility Emission Points ........................................................................................ 13 2.2 Facility Emissions.................................................................................................. 15

3. STACK PARAMETERS............................................................................................. 18

4. MODELING ................................................................................................................ 22

4.1 Air Dispersion Model ............................................................................................ 22 4.2 Meteorological Data............................................................................................... 23 4.3 Receptor Information ............................................................................................. 23

5. MULTIPATHWAY ANALYSIS ................................................................................ 26

5.1 Cancer Risk............................................................................................................ 26 5.2 Non-Cancer Risk.................................................................................................... 26 5.3 Exposure ................................................................................................................ 26

6. RISK RESULTS .......................................................................................................... 29

6.1 Air Dispersion Modeling Results........................................................................... 29 6.2 Risk Characterization............................................................................................. 31

Appendix A 2004 Toxic Air Contaminant Emission Inventory Appendix B Health Data Appendix C HARP Output: PMI Report Appendix D Effect of Downwind Trees on Dispersion

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List of Figures

Page Figure 1-1 CEMEX Project Site ..........................................................................................3

Figure 2-1 CEMEX Facility Plot Plan .................................................................................9

Figure 2-2 Receptor Grid, Cancer Risk Isopleths, and Points of Maximum Cancer Impact ....................................................................................................................10

Figure 2-3 Receptor Grid, Chronic Health Hazard Index Isopleths, and Points of Maximum Chronic Health Impact .....................................................................................11

Figure 2-4 Receptor Grid, Acute Health Hazard Index Isopleths, and Points of Maximum Acute Health Impact ..........................................................................................................12

Figure 4-1 Topographic Map of Facility and Vicinity......................................................25

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List of Tables Page Table 1-1 2004 Production Rates.......................................................................................5

Table 2-1 Chemicals Subject to Non-Inhalation Pathway Analysis..................................7

Table 2-2 Estimated Risk, Points of Maximum Impact.....................................................8

Table 2-3 Facility Emissions ...........................................................................................16

Table 3-1 Stack Parameters—Quarry Sources .................................................................19

Table 3-2 Stack Parameters—Cement Plant Sources ......................................................20

Table 3-3 Stack Parameters—Miscellaneous Sources.....................................................21

Table 3-4 Operating Schedule .........................................................................................21

Table 4-1 Sensitive Receptors (located within 2 miles of RMC) ....................................24

Table 5-1 Substance Specific Default Values for Multipathway Substances...................28

Table 6-1 Property Line and Maximum TAC Levels.......................................................30

Table 6-2 Estimated Risk, Points of Maximum Impact....................................................34

Table 6-3 Potential Health Impacts by Stack and Pathway ..............................................36

Table 6-4 Potential Health Impacts at Sensitive Receptors ..............................................37

Table 6-5 Maximum One-Hour Impacts at Pacific Elementary School ...........................38

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1. INTRODUCTION

1.1 The Air Toxics “Hot Spots” Act

The Air Toxics “Hot Spots” Act is designed to provide information to state and local agencies and to the general public on the extent of toxic air contaminant (TAC) emissions from stationary sources and the potential public health impacts of those emissions. The principal tool used to estimate and communicate risk is a Health Risk Assessment Report (HRA). This HRA has been prepared using procedures described in the The Air Toxics Hot Spots Program Guidance Manual for Preparation of Health Risk Assessments (the Guidance Manual) published by the California Office of Environmental Health Hazard Assessment (OEHHA) in 2003. The use of consistent risk assessment procedures and report presentation allows comparison of one facility to another, expedites the review of HRAs by reviewing agencies, and minimizes revision and resubmission of HRAs. The Guidance Manual contains a concise description of the algorithms, recommended exposure variates, and cancer and noncancer health values needed to perform a Hot Spots risk assessment under the Hot Spots Act. The Monterey Bay Unified Air Pollution Control District (MBUAPCD or District) has published Health Risk Assessments Supplemental Guidelines for the Air Toxics “Hot Spots” Information and Assessment Act [AB 2588] (District Guidelines) (March 2004). The District Guidelines provide additional guidance on specific aspects of HRA preparation. The District Guidelines were followed in the preparation of this HRA. 1.2 Risk Assessment

The standard approach currently used for health risk assessment was originally proposed by the National Academy of Sciences in the 1983 book Risk Assessment in the Federal Government: Managing the Process (NAS, 1983) and was updated in the Academy’s 1994 book Science and Judgment in Risk Assessment (NAS, 1994). There are four steps involved in the risk assessment process: (1) hazard identification, (2) exposure assessment, (3) dose-response assessment, and (4) risk characterization. This standard approach is applicable to many situations and programs. For the Air Toxics Hot Spots Program, much of the procedure has been standardized so that the results can be consistently and readily evaluated by the agencies and the public. For example, the hazard identification step for Hot Spots HRAs consists of determining which pollutants from a specific list are emitted at quantities above certain thresholds (specified by the California Air Resources Board [ARB]). Dose-response assessment for

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each compound involves looking up the current health effects determinations published by OEHHA. The software used to make the exposure assessment also performs the dose-response and risk characterization steps automatically. OEHHA recommends using a tiered approach to risk assessment. Tier 1 is a standard point-estimate approach following the procedures in the Guidance Manual. If site-specific information is available to modify some point-estimates and is more appropriate to use than the recommended point-estimates in the Guidance Manual, then Tier 2 allows use of that site-specific information. In Tier 3, a stochastic approach to exposure assessment is used with the data distributions contained in the Guidance Manual. Tier 4 is also a stochastic approach but allows for utilization of site-specific distributions if they are justifiable and more appropriate for the site under evaluation than those recommended in the Guidance Manual. The potential health impacts in this HRA were calculated using a Tier 1 analysis. All potential cancer risks are based on a (lifetime) 70-year exposure period. For the Air Toxics Hot Spots Program, the emitted substances that are addressed in a risk assessment are found in the list of hazardous substances designated in the ARB’s Emission Inventory Criteria and Guidelines Regulations (Title 17, California Code of Regulations, Sections 93300-93300.5) and The Emission Inventory Criteria and Guidelines Report (EICG Report) (ARB, 1997). The toxic air contaminants (TACs) emitted by this facility are listed and quantified in Table 2-3. Whether a pollutant is a potential human carcinogen or is associated with other types of adverse health effects is listed in Appendix B, which is taken from OEHHA’s Guidance Manual. The potency factor or Reference Exposure Level (REL) for each pollutant is also listed in Appendix B. All inhalation and oral RELs and cancer potency factors were taken from Appendix A of the HARP Users Guide, file created 1/2/04. This file was part of the HARP files on the ARB website (release date 8/11/05) at http://www.arb.ca.gov/toxics/harp/ harpdownload.htm. 1.3 Facility Information

1.3.1 Facility Description CEMEX owns and operates mineral quarries and a Portland cement production facility near Davenport, California. In 2004, the emission inventory year upon which this HRA is based, the company mined limestone and shale in the quarries and manufactured several grades of Portland cement. In August 2006, CEMEX stopped mining shale. Cement is shipped from the facility by rail and truck.

The CEMEX facility in Davenport, CA was constructed in 1905 and commenced operation shortly after the San Francisco earthquake in 1906. The facility occupies three large parcels of land: one approximately 104 acres in size, on which the cement plant is located; and two parcels totaling approximately 35 acres in size to the northeast, on

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which the quarries are located. A topographic map of the area covered by these parcels is presented in Figure 1-1.

Figure 1-1 CEMEX Project Site

Emissions at the facility are generated by operations that convert raw minerals to finished cement. These operations include (1) acquisition of raw materials, (2) preparation of raw materials, (3) pyroprocessing (high temperature reacting) of the raw materials to form clinker, and (4) grinding of the clinker into Portland cement.

Limestone is mined in open pits near Bonny Doon, California. The shale quarry is not currently in operation. However, it was in operation in 2004, which is the year of the emissions inventory used in this HRA. As a result, emissions from the shale quarry are included in the HRA.

Mined and crushed rock is transported to the Davenport plant by a four-mile-long overland conveyor belt system. These materials are stockpiled at the plant in open piles. Sand, laterite, iron ore, gypsum, and slag are delivered to the plant by rail or truck.

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Raw materials are mixed, crushed, and pre-heated prior to calcining in a cement kiln. A roller mill system swept by kiln exhaust gases is used to crush and dry these materials. A high efficiency separator system removes particles of adequate fineness and recycles larger particles back to the roller mill for further size reduction. Mixing of sized materials is completed in homogenizing silos equipped with airslides. Mixed kiln feed is then pre-heated and pre-calcined in a cyclone cascade system where kiln exhaust gases are used to heat and partially calcine this material.

Calcining and clinkering of the raw feed is completed in a single rotary kiln. Calcining is the heating of a substance to a high temperature but below the melting or fusing point, causing loss of moisture, reduction or oxidation, and the decomposition of carbonates and other compounds. Clinkering fuses the calcined material into small lumps, which are subsequently ground into cement. The kiln is fired with pulverized coal and exhaust gases flow countercurrent with the raw material. The clinker produced in the kiln drops from the firing end of the kiln into a clinker cooler where recycled air is blown through the clinker to cool it. The heated air leaving the clinker cooler is either dedusted and cooled for recirculation back to the clinker cooler fans, utilized as drying / conveying gases in the coal mill, or used as heated secondary or tertiary air in the pyroprocessing system. None of these gas streams go to the atmosphere without first passing through either the main stack control system or a baghouse.

All of the exhaust gas from the kiln, after preheating and precalcining raw feed, is ducted to a conditioning tower, where an alkaline slurry may be injected into the conditioning tower to scrub SO2 in the gas stream. Gases exiting the conditioning tower are either ducted to an electrostatic precipitator (ESP) to remove particulate matter or first utilized in the raw mill grinding process as drying/conveying air prior to being sent to the ESP. Exhaust from the ESP is vented to an exhaust stack.

Raw clinker is ground and mixed with gypsum to form cement. Finished cement is stored and loaded into railcars or trucks for bulk shipment.

Other sources of AB 2588-listed toxic air contaminants include a gasoline storage and dispensing system, an abrasive blasting unit, and several stationary and portable engines.

The cement production equipment, including the rotary kiln and raw and finish grinding systems, operate 24 hours per day, 7 days per week, and 48 weeks per year. Quarrying operations occur 10 hours per day, 5 days per week, and 50 weeks per year. The production rates of facility operations in 2004 are presented in Table 1-1.

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Table 1-1 2004 Production Rates

Operation Production Rate, tons/yr Limestone Quarrying 1,211,347

Shale Quarrying 67,034 Cement Production 888,865

Coal Use 101,372 Cement Shipping 895,334

1.4 Community Information (Sensitive Receptors)

Two developed areas lie within one mile of the facility. The town of Davenport, with a population of approximately 375, is adjacent to the southeast side of the facility. There is also the residential development of Newtown located approximately 0.4 miles northwest of the center of the facility. Both areas contain residential and workplace receptors. Sensitive receptors are locations where those who are especially susceptible to adverse health effects from exposure to toxic air contaminants, such as children, the elderly, and the ill, are likely to be found. Such facilities include schools (K-12), daycare centers, hospitals, clinics, and facilities that care for the elderly. The nearest school, Pacific Elementary School, is approximately 0.2 miles southeast of the facility in the town of Davenport. No other sensitive receptors are within two miles of the facility. Two other special receptor locations were included in the modeling analysis: the fire department, and the Davenport residence that is closest to the facility. These receptors were included because early screening runs indicated that they were likely to be the locations of the Actual Maximum Exposed Individual for acute impacts.

Table 1-2 Representative Receptors

Receptor Receptor Number UTM-N (NAD27) UTM-E Pacific Elementary School 2165 4,095,957 571,697

Closest residence in Davenport 2166 4,096,382 571,664

Fire Department 2167 4,095,957 571,594 Residence to North of Limestone Quarry 696 4,099,215 575,737

Newtown 1233 4,097,016 570,937

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2. EXECUTIVE SUMMARY

CEMEX owns and operates mineral quarries and a Portland cement production facility near Davenport, California. The company mines limestone and shale in the quarries and manufactures several grades of Portland cement. Cement is shipped from the facility by rail and truck. Emissions at the facility are generated by a number of operations that convert raw minerals to finished cement. These operations include (1) acquisition of raw materials, (2) preparation of raw materials, (3) pyroprocessing (high temperature reacting) of the raw materials to form clinker, and (4) grinding of the clinker into Portland cement. Two developed areas lie within one mile of the facility. The town of Davenport, with a population of approximately 375, is adjacent to the southeast side of the facility. In addition, the residential development of Newtown is located approximately 0.4 miles northwest of the center of the facility. The nearest school, Pacific Elementary School, is approximately 0.2 miles southeast of the facility in the town of Davenport. No other sensitive receptors (e.g., hospitals, day care centers) are within two miles of the facility. Based on facility public health risk prioritization conducted by the District, the facility must conduct a Health Risk Assessment in conformance with the California Air Toxics “Hot Spots” Program. This document, the Health Risk Assessment Report (HRA), presents the results of the assessment conducted by the facility operator. This HRA has been prepared using procedures described in The Air Toxics Hot Spots Program Guidance Manual for Preparation of Health Risk Assessments (the Guidance Manual) published by the California Office of Environmental Health Hazard Assessment in 2003. The HRA is based on emission estimates contained in the District’s 2004 Approved Inventory Report and recently updated with corrected emission factors for particulate matter (PM10). The Approved Inventory Report used old emission factors that predate the widespread use of dust suppression techniques in the cement industry. As part of the preparation of this HRA, emission factors were reviewed and updated to reflect current EPA emission factors. The District reviewed and approved the new emission estimates. Most of the toxicants assessed under the Hot Spots program are volatile organic compounds that remain as gases when emitted into the air. Significant exposure to these volatile organic toxicants emitted into the air only occurs through the inhalation pathway. A small subset of Hot Spots substances, semi-volatile organic and metal toxicants, is emitted partially or totally as particles subject to deposition. Ingestion and dermal

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pathways as well as the inhalation pathway have been evaluated for these chemicals, which are listed in Table 2-1.

Table 2-1 Chemicals Subject to Non-Inhalation Pathway Analysis

Chemical CAS number Arsenic 7440382 Benz[a]anthracene 56553 Benzo[a]pyrene 50328 Benzo[b]fluoranthene 205992 Benzo[k]fluoranthene 207089 Chrysene 218019 Polychlorinated Biphenyls 1336363 Dibenzo[a,h]anthracene 53703 Indeno[1,2,3,-cd]pyrene 193395 Lead 7439921

Because lactating mothers may be present in the residences near the facility, mother’s milk is a potentially viable pathway and has been included in the health risk assessment. Fruits and vegetables may be grown on property where residences are located near the facility; therefore, plant ingestion is a potentially viable pathway and has been included in the health risk assessment. Because there are no open waterways that serve domestic water systems near the facility nor fish that are raised near the facility for consumption by anyone living or working near the facility, the routes of water or fish products ingestion are not considered to be potential exposure pathways and will not be included in the assessment. Since there are no cattle grazed near the facility for consumption by anyone living or working near the facility, the animal product ingestion pathway is not considered to be a potentially viable pathway and will not be included in the risk assessment. Estimated risks at the property line, offsite point of maximum impact, the Actual Maximum Exposed Individual, and the Residential Maximum Exposed Individual are presented in Table 2-2. All locations in this report are expressed in Universal Transverse Mercator (UTM) coordinates. All UTM coordinates in this report are given in Zone 10 of NAD 27. NAD 27 is the preferred coordinate system for HRAs because the terrain elevation maps used for dispersion modeling are usually in this coordinate system. It should be noted that these coordinates differ from those used in other coordinate systems (e.g., the coordinate system used in Google Maps).

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NOTES: All UTM coordinates are NAD27. a The property line impacts are the highest impacts at the facility boundary. b The MC is defined as the receptor point(s) with the highest acute, chronic, or cancer health impacts at or outside the facility boundary. The MC for cancer risk is located at UTME 576,360, UTMN 4,097,850. The MC for chronic health hazard is located at UTME 576,360, UTMN 4,098,050. The MC for acute health hazard is located at UTME 572,137, UTMN 4,098,216. c The RMEI is defined as the existing off-site residence(s) (e.g., house or apartment) with the highest acute, chronic, or cancer health impacts. For cancer risk, it is located at UTME 575,737, UTMN 4,099,216. For chronic health hazard, it is located at UTME 571,937, UTMN 4,096,416. For acute health hazard, it is located at UTME 575,737, UTMN 4,099,216. d The AMEI is defined as the location where people not working at the facility do remain for periods of one hour or more, both on and off the facility property. For cancer risk, it is located at UTME 575,737, UTMN 4,099,216. For chronic health hazard, it is located at UTME 571,937, UTMN 4,096,416. For acute health hazard, it is located at UTME 575,737, UTMN 4,099,216. Locations of these points are shown in Figures 2-2, 2-3, and 2-4, on a background receptor grid with 200-meter spacing. Virtually all of the estimated cancer risk is due to inhalation of Diesel particulate emitted by engines used in the limestone quarry. Virtually all of the estimated chronic health impacts are due to crystalline silica contained in dust emitted by quarrying and material handling activities. Acute health impacts are due to combustion emissions from Diesel engines in the quarry and from the cement kiln (emitted from the main stack). The District’s Rule 1003 defines significance levels and lays out requirements for subsequent actions when impacts are significant. Subsequent actions for significant impacts include notification of residents and businesses exposed to significant impacts, risk reduction audits to identify feasible means of risk reduction, and risk reduction plans to implement identified feasible risk reduction measures.

Table 2-2 Estimated Risk, Points of Maximum Impact

Receptor Cancer risk

Chronic health hazard index (target organ: respiratory)

Acute hazard index (target organ: respiratory)

Property Line a 13.1 E-6 1.1 0.7 Maximum Concentration (MC)b 13.1 E-6 1.1 1.2

Residential Maximum Exposed Individual (RMEI)c

1.7 E-6 0.2 0.4

Actual Maximum Exposed Individual (AMEI)d

1.7 E-6 0.2 0.4

Significance Level 10 E-6 1.0 1.0

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Figure 2-1 CEMEX Facility Plot Plan

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Figure 2-2 Receptor Grid, Cancer Risk Isopleths, and Points of Maximum Cancer Impact

RMEI=Residential Maximally Exposed Individual AMEI=Actual Maximally Exposed Individual o = Property line Risks are in units of chances per million

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Figure 2-3 Receptor Grid, Chronic Health Hazard Index Isopleths, and Points of Maximum

Chronic Health Impact

RMEI=Residential Maximally Exposed Individual AMEI=Actual Maximally Exposed Individual o = Property line

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Figure 2-4 Receptor Grid, Acute Health Hazard Index Isopleths, and Points of Maximum

Acute Health Impact

RMEI=Residential Maximally Exposed Individual AMEI=Actual Maximally Exposed Individual o = Property line

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The maximum potential offsite cancer risk is 13.1 in million, which is above the District’s significance level of 10 in a million. The area where impacts are above the District’s significance level extends less than 200 meters from the property boundary east of the limestone quarry. There are no residences in this area, and this area is not readily accessible to the public. The maximum potential offsite chronic health hazard is 1.06 at the fenceline of the limestone quarry. This is above the District’s significance level for Chronic Health Hazard Index of 1.0. The chronic health hazard falls below the District’s significance level within 200 meters of the fenceline. There are no residences in this area, and this area is not readily accessible to the public. Offsite acute health hazards are above the District’s notification levels of Acute Health Hazard Index of 1.0. There are two areas where the impacts are above the significance levels. They lie a few hundred meters north of the main plant, and are very small (less than 500 meters across). The pollutant that contributes most to the estimated impact is acrolein, which is a respiratory and eye irritant that comes from combustion. All of the impact comes from the main stack. There are no residences in the impacted area. In considering the significance of these impacts, it should be noted that the reference levels for acrolein are unusually controversial. See Section 6.2.1 for additional discussion. The emission estimates used in this HRA are based on the District’s 2004 Approved Inventory Report for CEMEX, Facility ID 1186 and corrected in November 2006 with updated fugitive dust emission factors and additional dioxin emission information. The TAC emission estimates for the 2004 operating year were developed by RMC staff and approved by MBUAPCD. Emissions from the kiln are based on stack tests and operating records. Emissions from other sources are based on Compilation of Air Pollutant Emission Factors, Volume I: Stationary Point and Area Sources (AP-42) emission factors. 2.1 Facility Emission Points

Emissions at the facility are generated by operations that convert raw minerals to finished cement. These operations include (1) acquisition of raw materials, (2) preparation of raw materials, (3) pyroprocessing (high temperature reacting) of the raw materials to form clinker, and (4) grinding of the clinker into Portland cement. Most of the emissions come from a single source: the main stack from the kiln. The kiln is fired with pulverized coal and exhaust gases flow countercurrent to the raw material. The clinker produced in the kiln drops from the firing end of the kiln into a clinker cooler where recycled air is blown through the clinker to cool it. The heated air leaving the clinker cooler is either dedusted and cooled for recirculation back to the clinker cooler fans, utilized as drying/conveying gases in the coal mill, or used as heated secondary or tertiary air in the pyroprocessing system. Exhaust gas from the kiln, after preheating and precalcining raw feed, is ducted to a conditioning tower, where an alkaline slurry may

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injected into the conditioning tower to scrub SO2 in the gas stream. Gases exiting the conditioning tower are either ducted to an electrostatic precipitator (ESP) to remove particulate matter or first utilized in the raw mill grinding process as drying/conveying air prior to being sent to the ESP. Exhaust from the ESP is vented to an exhaust stack. Most of the remaining emissions from the facility are dust (cement dust and dust from limestone and other raw materials). Dust is emitted whenever dry materials are handled or processed. Crystalline silica, a respiratory irritant, is a component of the dust. Places where handling or processing might emit dust are vented to dust collector baghouses, where most of the dust is filtered out of the air. 2.1.1 Acquisition of Raw Materials Limestone and shale are extracted from quarries in the hills above the cement plant. Rock dust is generated by blasting, crushing, screening, and handling operations. Except for the actual quarrying, fugitive dust from the material handling activities is controlled by dust collector baghouses that collect and filter the dust from the air. Fugitive dust from the quarry and roads is also minimized by water. Diesel-fueled engines are used in the quarry to operate drills, screens, crushers, and other equipment. In this HRA, each quarry is modeled as an area source for fugitive dust emissions from blasting and quarrying. To simplify the modeling and data entry, the other sources in each quarry are grouped together. A grouped dust source (including crushing, screening, storage and transfer) and a grouped Diesel engine source were located at the centroid of each quarry, and all of the emissions from such sources within the quarry were modeled as being emitted from that point. The following sources are significant contributors (i.e., contribute more than 1% to cancer risk or non-cancer health hazard index) to facility risk:

• The Diesel engines used in the quarry are responsible for virtually all of the offsite cancer risk, and contribute to the offsite acute health hazard.

2.1.2 Preparation of Raw Materials Once delivered to the facility, the raw materials are mixed, crushed, dried, and preheated prior to calcination in the cement kiln. These activities generate dust, which is controlled by several dust control devices. The Gypsum Receiving/Conveying System contributes more than 90% of the chronic health hazard. 2.1.3 Pyroprocessing Calcining and clinkering of the raw feed is completed in a single rotary kiln. The kiln is fired with pulverized coal. The exhaust from the kiln contains dust from the materials and combustion products from the coal. Dust is removed from the exhaust by a dust collector and an electrostatic precipitator. Sulfur oxides are scrubbed from the exhaust by either an alkaline slurry injected in the conditioning tower or roller mill, or just the high

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lime content in the roller mill environment. Hot gases are exhausted from the main stack in the center of the plant. The kiln is a significant contributor (i.e., contributes more than 1% to cancer risk or non-cancer health hazard index) to offsite acute health hazard. 2.1.4 Clinker Grinding, Cement Storage, and Loading Clinker from the cement kiln is ground into cement in the finish mills. Dust is generated by the grinding and handling of the clinker and cement. The finish mills contribute slightly more than 1% to the maximum chronic health hazard index. 2.2 Facility Emissions

The emission inventory used for this HRA is the 2004 emission inventory, as provided by the District. During the development of this HRA, a number of corrections were made to the emission inventory, with the approval of the District.

1. Acrolein: The 2004 emission inventory included 53 lb/year of acrolein from the laboratory vent exhaust. Acrolein is a combustion product, and is not emitted by the laboratory. This emission was therefore deleted.

2. Silica: The 2004 emission inventory used outdated emission factors to estimate emissions of particulates. These emission factors were developed at a time when many of the limestone handling activities at quarries were not controlled, resulting in very high particulate emissions. All transfer points are now controlled using dust collectors and other techniques, and hence, the emission factors for limestone handling activities are much lower.

3. Carbonyl Sulfide: Under the Hot Spots regulations, pollutants that are emitted at rates less than the “degree of accuracy” may be reported as zero emissions. Carbonyl sulfide emissions from the facility are estimated to be less that 100 lb/year, and as a result were not included in the 2004 inventory. The District has requested that carbonyl sulfide emissions be estimated and included in the HRA.

4. Dioxins and Furans: Five dioxins and furans were detected in a 2004 emission test at the main stack. Although these were not included in the 2004 emission inventory, they have been added to the emission inventory used to conduct the HRA.

Hourly maximum and annual emissions for each source are presented in Appendix A. Facility emissions are summarized in Table 2-3.

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Table 2-3 Facility Emissions

Pollutant CAS Annual emissions,

lb/year Maximum hourly emissions, lb/hr

1,3-Butadiene 106990 18.1 2.29E-03 2-Methylnaphthalene 91576 20.5 2.59E-03 Acenapththylene 208968 1.84 2.32E-04 Acenapthene 83329 2.86 3.61E-04 Acetaldehyde 75070 7160 9.04E-01 Acrolein 107028 432 3.90E-01 Aluminum 7429905 0.18 1.0E-04 Ammonia 7664417 10,380 1.2 Anthracene 120127 0.15 1.86E-05 Antimony 7440360 0.27 3.37E-05 Arsenic 7440382 7.8E-01 9.8E-05 Barium 7440393 2.6E-02 6.9E-06 Benz[a]anthracene 56553 0.010 1.25E-06 Benzene 71432 1835 2.31E+01 Benzo[a]pyrene 50328 0.010 1.25E-06 Benzo[g,h,i]perylene 191242 0.010 1.25E-06 Benzo[b]fluoranthene 205992 0.010 1.25E-06 Benzo[k]fluoranthene 207089 0.01 1.25E-06 Beryllium 7440417 5.8E-02 7.3E-06 Cadmium 7440439 0.15 1.9E-05 Carbon Disulfide 75150 560 7.07E-02 Carbonyl Sulfide 463581 97 0.011 Chlorobenzene 108907 235 2.97E-02 Chlorophenols* 1060 0.59 7.42E-05 Chromium 7440473 0.29 3.64E-05 Chromium, hexavalent 18540299 0.14 1.8E-05 Chrysene 218019 0.010 1.25E-06 Cobalt 7440484 2.9E-04 7.2E-08 Copper 7440508 12.4 1.57E-03 Dioxins: 1,2,3,4,6,7,8,9 Octachlorodibenzo-p-dioxin 3268879 3.64E-06 4.59E-10 Furans: 2,3,7,8 Tetrachlorodibenzo-p-furan 51207319 1.27E-05 1.56E-09 1,2,3,7,8 Pentachlorodibenzo-p-furan 57117416 1.78E-06 2.25E-10 2,3,4,7,8 Hexachlorodibenzo-p-furan 57117314 2.86E-06 3.61E-10 1,2,3,4,7,8,9 Octachlorodibenzo- 39001020 5.38E-07 6.79E-11

* Listed as “Chlorobiphenyls” in the 2004 inventory

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Table 2-3 Facility Emissions

Pollutant CAS Annual emissions,

lb/year Maximum hourly emissions, lb/hr

p-furan Dibenzo[a,h]anthracene 53703 0.010 1.25E-06 Diesel PM10 9901 333 1.65 Ethyl Benzene 100414 62.8 7.93E-03 Fluorene 86737 1.56 1.97E-04 Fluoranthene 206440 0.477 6.02E-05 Formaldehyde 50000 5607 7.08E-01 Hexane 110543 28.99 3.66E-03 Hydrogen Chloride 7647010 1853 2.34E-01 Hydrogen Fluoride 7664393 79.2 1.00E-02 Hydrogen Sulfide 7783064 238 3.01E-02 Indeno[1,2,3,-cd]pyrene 193395 0.01 1.25E-06 Lead 7439921 4.78 6.03E-04 m,p-Xylene 106423 210 2.65E-02 Manganese 7439965 15.5 1.96E-03 Mercury 7439976 175 2.21E-02 Methylene Chloride 75092 164 2.07E-02 Naphthalene 91203 131 1.66E-02 Nickel 7440020 4.14 5.23E-04 o-Xylene 95476 90.3 1.14E-02 p-Dichlorobenzene 106467 12.3 1.55E-03 Phenanthrene 85018 3.89 4.91E-04 Phenol 108952 3564 4.50E-01 Phosphorus 7723140 99.0 1.25E-02 Polychlorinated Biphenyls* 1336363 1.69 2.13E-04 Perylene 198550 0.0099 1.25E-06 Pyrene 129000 0.15 1.94E-05 Selenium 7782492 0.54 6.88E-05 Silica, crystalline† 1175 26152 51 Styrene 100425 93.5 1.18E-02 Toluene 108883 413 5.21E-02 Vanadium 7440622 2.71 3.42E-04 Vinyl Chloride 75014 221 2.79E-02 Zinc 7440666 49.0 6.19E-03

* Polychlorinated Biphenyls includes decachlorobiphenyl, dichlorobiphenyl, heptachlorobiphenyl, nonachlorobiphenyl, octachlorobiphenyl, pentachlorobiphenyl, tetrachlorobiphenyl, and trichlorobiphenyl. † Crystalline Silica includes cristobalite, quartz, and tridymite.

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3. STACK PARAMETERS

Toxic air contaminants are emitted by many sources at this facility. They fall into three categories: (1) emissions of particulate from the handling and physical processing of limestone and shale; (2) combustion emissions from the heaters and engines used at the facility; and (3) pyroprocessing emissions from the kiln. Some sources share a common stack. Other sources are similar enough in emission characteristics (stack parameters, emission type) to justify combining the emissions and modeling them as if they were emitted from a common stack. For example, each of the mobile engine sources used in the limestone quarry could be operated anywhere in the quarry. All of the engines have been grouped together and the emissions modeled as if they all came from a single stack in the center of the quarry. Locating the modeled source in the center of the quarry simulates the averaging effect of moving the engine around the quarry; combining the stacks simplifies the modeling, and provides some insight into the cumulative contribution of Diesel engines to the overall risk. The stack parameters used to model the dispersion from these emission points are presented in Tables 3-1, 3-2, and 3-3. The operating schedules for sources at the facility are shown in Figure 3-4.

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Table 3-1 Stack Parameters—Quarry Sources

HARP Src stk dev Source

UTM-N (NAD27)

UTM-E (NAD27)

Base Elevation,

ft Height,

ft

Stack Diameter,

ft Velocity,

fpm

Flow Rate, acfm Temp, °F

20 21 40 Quarry Blasting 4,098,003 575,736 873.0 4 Area: 1260 ft x 1675 ft 21 22 41 Unpaved Roads 4,097,816 571,337 120.3 4 Area: 1000 ft x 1000 ft

14 5 3 Shale Quarry System 4,097,868 573,187 684.1 4 Area: 2700 ft x 2100 ft

Limestone Non-fugitive Dust Sources—modeled as a single source in the center of the limestone quarry

2 Limestone Quarry

Crushing and Screening 13 3

9 Raw Material Retrieval

4,098,003 575,736 873.0 4 Area: 1260 ft x 1675 ft

15 6 8 Overland Conveyor System 4,097,816 571,337 120.3 4 Area: 1000 ft x 1000 ft

Quarry Engines—modeled as a single engine in the center of the limestone quarry

28 Limestone Quarry Mobile Drill Rig

4 Mobile Drill Rig #2

35 Portable Engine Generator

36 Emergency Generator

38 Portable Engine Generator

10 20

39 Portable Engine Compressor

4,098,003 575,736 873.0 10 1 9,000 850

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Table 3-2 Stack Parameters—Cement Plant Sources

HARP Src stk dev Source

UTM-N (NAD27)

UTM-E (NAD27)

Base Elevation,

ft Height,

ft

Stack Diameter,

ft Velocity,

fpm

Flow Rate, acfm

Temp, °F

16 7 22 Long Term Limestone Stockpile

4,096,724 571,486 174.4 4 Area: 275ft x 250ft

20 Alkaline Slurry Preparation 3 13

24 Gypsum Receiving and Conveying

4,096,741 571,528 187.4 10 10 30 70

7 Coal/Slag

Receiving & Storage 18 9

12 Coal/Slag Reclaim

4,096,854 571,233 107.6 4 Area: 300 ft x 400 ft

19 10 16 Coal Mill 4,096,755 571,318 107.9 10 10 382.0 30,000 70

17 8 21 Sand, Laterite, & Iron Ore Receiving 4,096,742 571,528 187.4 10 10 30 70

1 11 10 Homogenization Silos 4,096,328 571,328 113.2 70 10 127 10,000 300

11 Feed Surge Bin 12 1

11 Kiln Feed 4,096,737 571,349 110.9 40 2 3183 10,000 300

11 2 1 Cement Clinkering 4,096,816 571,337 120.3 200 20 795.8 250,000 230 17 Clinker Fringe Bin 13 Clinker Storage 18 Clinker Fines Bin

2 12

14 Clinker Reclaim

4,096,626 571,425 107.5 10 10 30 300

4 14 5 Finish Mills 4,096,679 571,379 108.0 10 10 30 300 5 15 6 Cement Silos 4,096,523 571,376 86.6 100 10 30 70

15 Cement Conveying & Transfer System

26 Waste Dust 6 16

29 Waste Dust Disposal

4,096,484 571,379 80.1 10 10 471.1 37,000 70

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Table 3-3 Stack Parameters—Miscellaneous Sources

HARP Src stk dev Source

UTM-N (NAD27)

UTM-E (NAD27)

Base Elevation,

ft Height,

ft

Stack Diameter,

ft Velocity.

Fpm

Flow Rate, acfm

Temp, °F

7 17 30 Gasoline Storage and Dispensing 4,096,481 571,452 93.6 10 10 30 70

31 Lab Vent Exhaust

32 Polab Dust Collection System 8 18

33 Waste Material Disposal

4,096,752 571,410 125.7 10 10 30 70

9 19 34 Abrasive Blasting 4,096,688 571,431 117.5 10 10 30 70

Table 3-4 Operating Schedule

Sources

Daily operation,

hrs/day

Weekly operation, days/week

Annual operation, days/year

Limestone Quarry Operation 2, 4, 8, 28 8 5 250

Quarry Blasting 40 0.1 2 50 Unpaved Roads 41 24 7 250

Portable Engines 35, 36, 37, 38, 39 24 7 250

Shale Quarry Operation (no longer in operation)

3 6 1 100

Cement Plant (the plant is not allowed to operate more then 330 days a year, per permit requirements)

1, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 24,

26, 29

24 7 330

Coal receiving and storage 7 8 7 330

Misc. sources 30, 31,32,33,34 24 7 330

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4. MODELING

4.1 Air Dispersion Model

The results presented in this risk assessment were determined using the HARP (Version 1.3) computer program, developed by the ARB, OEHHA, and the air districts. HARP is a single integrated software package used by regulators and facility operators to promote statewide consistency, efficiency, and cost-effective implementation of HRAs and the Hot Spots Program. The HARP software package consists of three modules: (1) the Emissions Inventory Database Module, (2) the Air Dispersion Modeling Module, and (3) the Risk Analysis and Mapping Module. HARP uses ISCST3 in the Air Dispersion Modeling Module. The meteorological data that were used by the ISCST3 module in the HARP program was collected during 1999. This year was selected because it was the most complete set of data available for the Davenport station. Two meteorological datasets were used in this project: wind speed, wind direction, and ambient temperature data were collected at the station located at the Davenport Fire Department (Latitude: +37.011944, Longitude:-122.193333), located approximately 500 meters southeast of the RMC facility. Stability data were collected at Fort Funston station in San Francisco (37.7148, -122.5005) by BAAQMD. These two sites have similar characteristics. Both are coast locations, and both are impacted by similar coast marine meteorology. Because mixing height data were not available, the collected data were used to create two ISCST3 compatible meteorological data sets. One set used a uniform mixing height of 300 meters, and the other used a uniform mixing height of 73 meters. The 300-meter mixing height dataset was used to estimate annual average ground level concentrations (used to estimate chronic health hazard index and cancer risks). The lower mixing height of 73 meters was used to estimate hourly maximum ground level concentrations (used to estimate acute health hazard index). This mixing height was determined by the District to result in the worst case short-term ground level impact. When an air stream passes over a building, the air stream can be forced towards the ground in the building’s wake. This phenomenon is called “downwash,” and it can cause the plume from a stack to reach the ground much sooner than it otherwise would. Because the plume reaches the ground sooner, it has had less time to spread out, and concentrations are higher. Downwash is usually not a factor for buildings that are located more than five times the building’s height away from a stack (for the purposes of the downwash calculation, a building’s height is measured from the base of the stack, taking into account the difference in elevation between the land where the stack is located and the land under the building). ISC can include downwash effects in its dispersion

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calculations. The options that address downwash were enabled in the dispersion model for this project. A list of all receptors (i.e., specific locations where the model calculated concentrations) with either an acute or chronic health hazard index of 1.0 is presented in Appendix C. The full PMI report (listing the 1,000 receptors with the highest risk), as well as the standard set of reports generated by HARP, is in electronic form on the disc that accompanies this report. 4.2 Meteorological Data

Two sets of meteorological data were used in this project. Wind speed, wind direction, and ambient temperature data for 1999 were collected at a meteorological station in Davenport). Because stability and mixing height data were not available from that site, 1999 stability data from Fort Funston were used to create a full data set for modeling. Fort Funston was selected as the site most similar to Davenport for which data are available. These data were combined to create an ISCST3-ready meteorological data set. Runs were made with mixing heights of 300 and 73 meters. The 300-meter mixing height dataset was used to estimate annual average ground level concentrations (used to estimate chronic health hazard index and cancer risks). The lower mixing height of 73 meters was used to estimate hourly maximum ground level concentrations (used to estimate acute acute health hazard index). The District approved of the approach taken to develop the meteorological data set. There were 256 missing data points out of 8,760 hours for the 1999 Davenport data. The missing data were replaced as follows:

• If the missing data gap was less than 5 hours, the data were replaced by the data from the last non-missing hour.

• If the missing data gap was 5 hours or more, the above approach would not reflect

diurnal variations in temperature and wind patterns. Therefore, substitution was made from nearby locations with similar site-specific (surface-specific) characteristics (Fort Funston data). There were two such gaps for the data: (1) from 99091508 to 99091611, 28 hours of wind direction value were missing; and (2) from 99111319 to 99112212, 210 hours of wind direction value were missing.

4.3 Receptor Information

Receptor elevations were derived from Digital Elevation Map (DEM) data files prepared by the U.S. Geological Survey (USGS). DEM files in the 7.5 minute series for Davenport, Año Nueveo, Santa Cruz, and Felton were downloaded from the Internet and imported into the HARP program to automatically assign elevations to the receptor grids used in the dispersion modeling input files.

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4.3.1 Fenceline Receptors For many facilities, the maximum concentration is located on the facility property. In such cases, the maximum offsite impact is at the fenceline. HARP allows fenceline receptors to be explicitly modeled to assure that the maximum offsite impact is evaluated. Fenceline receptors, spaced 200 meters apart around the property boundary, have been included in the model. 4.3.2 Sensitive Receptors Sensitive receptors are especially susceptible to adverse health effects from exposure to TACs, including children, the elderly, and the ill. K-12 schools, day care centers, nursing homes, retirement homes, health clinics, and hospitals are considered sensitive receptors. Table 4-1 provides location data for sensitive receptors located within two miles of the RMC facility. The nearest school, Pacific Elementary school, is approximately 0.2 miles southeast of the facility in the town of Davenport. No other sensitive receptors are within two miles of the facility.

Table 4-1 Sensitive Receptors (located within 2 miles of RMC)

Receptor Address UTM-N (NAD27) UTM-E Schools

Pacific Elementary School

50 Ocean Street Davenport, CA 4,095,957 571,697

The UTM (NAD27) coordinates of the kiln exhaust stack, which has been used as the reference point for dispersion modeling, are UTMN 4,096,816, UTME 571,337. A topographic map of the area is shown in Figure 4-1.

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Figure 4-1 Topographic Map of Facility and Vicinity

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5. MULTIPATHWAY ANALYSIS

5.1 Cancer Risk

To characterize total cancer risk for a single multipathway substance, the inhalation risk is calculated by multiplying the inhalation dose (in mg/kg-day) by the inhalation cancer potency factor to give the inhalation cancer risk. Using Tier 1 HRA methodology, the dermal and oral dose from each relevant exposure pathway is multiplied by the substance-specific oral potency factor to give the non-inhalation cancer risk. The inhalation cancer risk and oral cancer risk are then summed to give the multipathway cancer risk for that substance. The cancer risk from each of the individual substances (including multipathway and volatile, inhalation-only substances) is summed to give the total multipathway cancer risk for the entire facility at the receptor location. 5.2 Non-Cancer Risk

Non-cancer impacts are determined for acute (inhalation) exposure and for both inhalation and non-inhalation chronic exposure. Estimates of health impacts for non-cancer endpoints are expressed as a health hazard quotient (i.e., the ground-level concentration of the individual substance divided by the substance’s REL) or a hazard index (i.e., the sum of health hazard quotients for multiple substances). In addition, all hazard quotients (HQ) and hazard indices (HI) must be determined by the target organ system. An HQ of one or less indicates that adverse non-cancer health effects are not expected to result from exposure to the emission of that substance. As the HQ increases above one, the human health hazard increases by an undefined amount. 5.3 Exposure

Most of the TACs assessed under the Hot Spots program are volatile organic compounds that remain as gases when emitted into the air. Significant exposure to these volatile organic TACs emitted into the air occurs only through the inhalation pathway. A small subset of Hot Spots substances, semi-volatile organic and metal TACs, is emitted partially or totally as particles subject to deposition. Ingestion and dermal pathways as well as the inhalation pathway have been evaluated for these chemicals, which are listed in Table 2-1. Because lactating mothers may be present in the residences near the facility, mother’s milk is a potentially viable pathway and will be included in the health risk assessment. Fruits and vegetables may be grown on property where residences are located near the

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facility; therefore, plant ingestion is a potentially viable pathway and has been included in the HRA. The drinking water supply for Davenport comes from a creek four miles away. Water from this creek is transported by pipeline to an open sandbox (approximately 8’x15’). The drinking water flows from the sandbox to a treatment system and enclosed water storage. Water for use in the CEMEX plant flows from the sandbox into an adjacent pond. Because there are no open waterways that serve domestic water systems near the facility nor fish that are raised near the facility for consumption by anyone living or working near the facility, the routes of water or fish products ingestion are not considered to be potential exposure pathways and have not been included in the assessment. Since there are no cattle grazed near the facility for consumption by anyone living or working near the facility, the animal product ingestion pathway is not considered to be a potentially viable pathway and has not been included in the risk assessment. The algorithms and default values contained in the Guidelines were used in this analysis. They are summarized in Table 5-1.

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Table 5-1 Substance Specific Default Values for Multipathway Substances (From: Table 5.3 The Air Toxics Hot Spots Program Guidance Manual)

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6. RISK RESULTS

6.1 Air Dispersion Modeling Results

Cancer risks are entirely due to Diesel particulate emitted from engines operating in the quarry. Because these engines are used in the excavated portion of the quarry, they can impact the higher terrain around them. Offsite cancer risks at the fenceline east of the quarry are above the District’s significance threshold of 10 in a million. The area where impacts are above the District’s significance level extends less than 200 meters from the property boundary. There are no residences in this area, and this area is not readily accessible to the public. A map showing the isopleths (lines on a map connecting points at which the risk has the same value) where cancer risk exceeds 1 in a million is shown in Figure 2-2. Chronic health hazards are due to crystalline silica contained in the dust emitted by quarrying and cement manufacturing activities. Crystalline silica affects the respiratory system. The maximum potential offsite chronic health hazard is 1.06 at the fenceline of the limestone quarry. This is above the District’s significance level for Chronic Health Hazard Index of 1.0. The chronic health hazard falls below the District’s significance level within 200 meters of the fenceline. There are no residences in this area, and this area is not readily accessible to the public.

Exceeding a health hazard index of 1.0 may indicate that there is the potential for adverse chronic health impacts at this receptor location. Therefore, there is increased concern that individuals exposed over a long period of time may experience respiratory system irritation, particularly among sensitive individuals. A map showing the isopleths of chronic health hazards where the hazard index exceeds 1.0 is shown in Figure 2-3. Acute health hazards are due to combustion emissions of acrolein. Virtually all of the acute health hazard at the point of maximum impact is due to emissions from the main stack. The acute health hazard index exceeds the District’s significance threshold of 1.0. Exceeding an acute health hazard index of 1.0 may indicate that there is the potential for adverse acute health impacts at this receptor location. Therefore, there is increased concern that exposed individuals may experience respiratory system irritation, particularly among sensitive individuals. A map showing the isopleths of acute health hazards where the health hazard index exceeds 1.0 is shown in Figure 2-4. There are no residences in the area where the health hazard index exceeds one. Table 6-1 shows the estimated concentrations of compounds (and the sources from which the compounds are emitted) that contributed to risk. Table 6-1 shows the contribution to risk for each significant source (i.e., source that contributes more than 1% to risk).

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Table 6-1 Property Line and Maximum TAC Levels

Downwind Concentrations Average concentrations (µg/cu m) Max Hourly Concentrations (µg/cu m) Stack Number

(= HARP SRC #) Stack Name TAC CAS numbers PL MC AMEI RMEI PL MC AMEI RMEI

Cancer Risk Receptor 2140 2140 696 696 10 Quarry Diesel Engines Diesel Particulate 9901 3.1 E-02 3.1 E-02 3.9 E-03 3.9 E-03

Chronic Health Hazard (Respiratory) Receptor 2141 2141 1391 1391

14 Finish Mills Crystalline Silica 1175 6.1 E-02 6.1 E-02 7.2 E-02 7.2 E-02

13 Gypsum Receiving/Conveying Crystalline Silica 1175 3.0 E+00 3.0 E+00 4.3 E-02 4.3 E-02

20 Sand Laterite and Ore Receiving Crystalline Silica 1175 6.9 E-02 6.9 E-02 9.8 E-04 9.8 E-04

Acute Health Hazard Quotients (Respiratory) Receptor 933 2145 696 696

10 Quarry Diesel Engines Acrolein 107028 1.8 E-03 1.1 E-01 6.0 E-02 6.0 E-02

11 Main Stack Acrolein 107028 2.2 E-01 2.4 E-02 2.3 E-02 2.3 E-02 Formaldehyde 50000 2.9 E+00 3.1 E-01 3.0 E-01 3.0 E-01

PL = Property Line with Highest Risk MC = Maximum Offsite Concentration Point AMEI = Maximum Concentration at publicly accessible site where people might spend time RMEI = Maximum Concentration at Existing Residence

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A complete list of all grid point UTM coordinates and health hazards where the hazard index exceeds 1.0 is included in Appendix C. The estimated ground-level concentrations (GLC) for each pollutant at each receptor are contained in the standard set of reports generated by HARP. These are too voluminous to include in the text of this report. The files are included in electronic format on a compact disc that accompanies this report. 6.1.1 Mercury The District requested that a special discussion of the estimated impacts due to mercury be included in the HRA. Mercury is emitted from the main stack due to the combustion of coal. The highest offsite noncancer risks, both acute and chronic, are from compounds that affect the respiratory system. Compounds that contribute to respiratory risk are included in Table 6-1. Because the target organ for mercury is the nervous system, not the respiratory system, mercury is not included in Table 6-1. For comparison purposes, the chronic health hazard index at Pacific Elementary School is 0.175 (due entirely to silica dust, which affects the respiratory system), while the chronic health hazard index due to mercury at the same location is 0.00008. The acute health hazard index is 0.013, while the acute health hazard index due to mercury is 0.00033. Values are similar throughout the town of Davenport. 6.2 Risk Characterization

This section presents the HRA results. Calculated risks for the point of maximum impact, the maximally exposed individual (residential), maximally exposed individual (worker), and all identified sensitive receptors are presented in tabular form. As discussed in detail in Section 5, all of the calculated health impacts are cumulative. That is, the cancer risks from all carcinogens, from all sources, and from all pathways, are added, and the resulting sum is the reported risk. For non-cancer effects, the combined health impacts from all pollutants affecting a single target organ, from all sources, and from all pathways are added, and the highest sum is the reported health impact. For all receptors, respiratory impacts are the highest risk for both chronic and acute health impacts. 6.2.1 Uncertainty There is a large uncertainty in the process of risk assessment. The uncertainty arises from lack of data in many areas, necessitating the use of assumptions. The assumptions used in HRA guidelines are designed to err on the side of health protection to avoid underestimation of risk to the public. Sources of uncertainty, which may either overestimate or underestimate risk, include (1) extrapolation of toxicity data in animals to

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humans, (2) uncertainty in the estimation of emissions, (3) uncertainty in the air dispersion models, and (4) uncertainty in the exposure estimates. Uncertainty may be defined as what is not known and may be reduced with further scientific studies. In addition to uncertainty, there is a natural range or variability in the human population in such properties as height, weight, and susceptibility to chemical toxicants. Scientific studies with representative individuals and large enough sample size can characterize this variability. Other uncertainties arise (1) in the assumptions underlying the dose-response model used, and (2) in extrapolating from large experimental doses, where, for example, other toxic effects may compromise the assessment of carcinogenic potential, to usually much smaller environmental doses. Also, only single tumor sites induced by a substance are usually considered.

Thus, risk estimates generated by an HRA should not be interpreted as the expected rates of disease in the exposed population but rather as estimates of potential risk, based on current knowledge and a number of assumptions. Additionally, the uncertainty factors integrated within the estimates of noncancer RELs are meant to err on the side of public health protection in order to avoid underestimation of risk. Risk assessment is best used as a ruler to compare one source with another and to prioritize concerns. Consistent approaches to risk assessment are necessary to fulfill this function. (Source: The Air Toxics Hot Spots Program Guidance Manual for Preparation of Health Risk Assessments, OEHHA, August 2003, p. 1-4)

In considering the significance of the impacts described in this HRA, it should be noted that the reference levels for acrolein are unusually controversial. Because this chemical is unstable and reacts easily with a variety of other combustion and atmospheric constituents, the concentration that is potentially emitted from the combustion source has little chance of reaching an offsite receptor to be inhaled. The studies upon which its acute REL of 0.19 µg/m3 is based were conducted in the 1960s, when the ability to accurately measure the concentration of acrolein had great uncertainties. It is not at all clear that the concentrations breathed in the exposure studies in the 1960s were, in fact, the same as the concentrations measured in the laboratory analyses, given the analytical techniques available at that time. The acute REL is nearly ten times lower than typical ambient levels of acrolein present in urban atmospheres in California.* More recent exposure studies have evaluated concentrations one or two orders of magnitude higher than the acute REL. 6.2.2 Property Line (PL) The property lines for the three properties comprising the facility (cement plant, shale quarry, limestone quarry) are shown in Figure 1-1. Because these lines are the publicly accessible locations closest to the source of toxics, the point of maximum impact is often found at the property line. Receptors were spaced 200 meters apart around the property line to ensure that risks at the property boundary were fully characterized.

* http://www.oehha.ca.gov/air/toxic_contaminants/pdf_zip/Acrolein_final.pdf

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The PL (Receptor 2140) for maximum cancer risk is located at the fenceline on the northeast side of the limestone quarry at UTME 576,360, UTMN 4,097,850. It is marked on Figure 2-2. The potential cancer risk at this location is listed in Table 6-2. The PL (Receptor 2141) for maximum potential chronic health impacts is located at the fenceline on the northeast side of the cement plant at UTME 576,360, UTMN 4,098,050. It is marked on Figure 2-3. The potential chronic health hazard at this location is listed in Table 6-2. The PL (Receptor 2145) for maximum potential acute health impacts is located at the fenceline on the northern side of the limestone quarry at UTME 576,360, UTMN 4,098,614. It is marked on Figure 2-4. The potential acute health hazard at this location is listed in Table 6-2. 6.2.3 Maximum Concentration (MC) The MC is defined as the receptor point(s) with the highest cancer, acute health, or chronic health impacts at or outside the facility boundary. The MC (Receptor 2140) for maximum potential cancer risk is located at the fenceline on the northeast side of the limestone quarry at UTME 576,360, UTMN 4,097,850. It is marked on Figure 2-2. The potential cancer risk at this location is listed in Table 6-2. Table 6-3 shows that the quarry engines contribute virtually all of the risk at this location. It should be noted that some receptor points with higher risks are listed in Appendix C. All of these points are located within the facility boundary. The MC (Receptor 2141) for maximum potential chronic health impacts is located at the fenceline on the northeast side of the cement plant at UTME 576,360, UTMN 4,098,050. It is marked on Figure 2-3. The potential chronic health hazard at this location is listed in Table 6-2. Table 6-3 shows that the gypsum receiving/conveying equipment contributes virtually all of the chronic health risk at this location. Table 6-1 shows that the finish mills and sand, laterite and ore receiving operations each contribute slightly more than 1% to the risk. It should be noted that some receptor points with higher chronic health impacts are listed in Appendix C. All of these points are located within the facility boundary. The MC (Receptor 933) for maximum potential acute health impacts is located north of the main plant and west of the shale quarry at UTME 572,137, UTMN 4,098,216. It is marked on Figure 2-4. The potential acute health hazard at this location is listed in Table 6-2. Table 6-3 shows that the main stack contributes virtually all of the acute health risk at this location. 95% of the acute health impact is due to acrolein; 5% comes from formaldehyde. It should be noted that some receptor points with higher acute health impacts are listed in Appendix C. All of these points are located within the facility boundary. 6.2.4 Residential Maximum Exposed Individual (RMEI) The RMEI is defined as the existing off-site residence(s) (e.g., house or apartment) with the highest acute, chronic, or cancer health impacts. The cancer risk is calculated based

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on a lifetime (70 years) of exposure to the average annual concentration of carcinogens at the receptor location. The RMEI (Receptor 696) for maximum potential cancer risk is located to the north of the limestone quarry, at UTME 575,737, UTMN 4,099,216. It is marked on Figure 2-2. The potential cancer risk at this location is listed in Table 6-2. The RMEI (Receptor 1391) for maximum potential chronic health impact is located in the town of Davenport, at UTME 571,937, UTMN 4,096,416. It is marked on Figure 2-3. The potential chronic health hazard at this location is listed in Table 6-2. The RMEI (Receptor 696) for maximum potential acute health impact is located to the north of the limestone quarry, at UTME 575,737, UTMN 4,099,216. It is marked on Figure 2-4. The potential acute health hazard at this location is listed in Table 6-2.

NOTES: All UTM coordinates are NAD27. a The property line impacts are the highest impacts at the facility boundary. b The MC is defined as the receptor point(s) with the highest acute, chronic, or cancer health impacts at or outside the facility boundary. The MC for cancer risk is located at UTME 576,360, UTMN 4,097,850. The MC for chronic health hazard is located at UTME 576,360, UTMN 4,098,050. The MC for acute health hazard is located at UTME 572,137, UTMN 4,098,216. c The RMEI is defined as the existing off-site residence(s) (e.g., house or apartment) with the highest acute, chronic, or cancer health impacts. For cancer risk, it is located at UTME 575,737, UTMN 4,099,216. For chronic health hazard, it is located at UTME 571,937, UTMN 4,096,416. For acute health hazard, it is located at UTME 575,737, UTMN 4,099,216. d The AMEI is defined as the location where people not working at the facility do remain for periods of one hour or more, both on and off the facility property. For cancer risk, it is located at UTME 575,737, UTMN 4,099,216. For chronic health hazard, it is located at UTME 571,937, UTMN 4,096,416. For acute health hazard, it is located at UTME 575,737, UTMN 4,099,216. 6.2.5 Actual Maximum Exposed Individual (AMEI) The AMEI is defined as the location where people not working at the facility do remain for periods of one hour or more, both on and off the facility property. This can be an

Table 6-2 Estimated Risk, Points of Maximum Impact

Receptor Cancer risk

Chronic health hazard index (target organ: respiratory)

Acute health hazard index (target organ:

respiratory) Property Linea 13.1 E-6 1.1 0.7 Maximum Concentrationb 13.1 E-6 1.1 1.2

Actual Maximum Exposed Individualc 1.7 E-6 0.2 0.4

Residential Maximum Exposed Individuald 1.7 E-6 0.2 0.4

Significance Level 10 E-6 1.0 1.0

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existing residence, an existing workplace, or a publicly accessible location where people might spend time. Unlike a resident, a worker is not assumed to be at the receptor location for an entire lifetime. There are three factors that affect worker exposure for cancer risk determination. The first is the offsite worker’s schedule - for example, some workers, such as teachers, have three months off during the summer and some workers work throughout the year except for weekends, holidays and vacation. The second factor is the operating schedule of the emitting facility under consideration. This is important because the ISCST-3 air dispersion computer model, or other models, typically calculate an annual average air concentration based on actual operating conditions. For example, the facility may operate 365 days a year, 24 hours a day; or may operate 8 hours a day, 5 days a week. The third factor is the coincidence of the offsite worker’s schedule with the time that the facility is emitting. For example, if the facility emits during the day, 5 days a week, and the offsite worker is working only at night, then no inhalation exposure would occur. OEHHA guidance,* used in this HRA, adjusts lifetime exposure (for the purposes of calculating cancer risk) to 8 hours per day, 245 days per year, for 40 years. If the annual average concentration of pollutants from the emitting facility (determined by the air model) is different than the air concentration that the worker breathes when present at the site, then the annual average concentration for the worker inhalation pathway is adjusted. For example, if the offsite worker and emitting facility are on concurrent schedules (i.e., the worker has a standard working schedule of 8 hours per day, 5 days a week, and the facility emits 8 hours per day, 5 days a week), then the annual average air concentrations for the worker inhalation pathway would need to be approximated by adjusting it upward using a factor of 4.2 (7/5 x 24/8). Because the quarry operates on such a schedule, worker exposure to quarry emissions was adjusted in this way. Under the Guidelines, acute and chronic health hazards are not adjusted for worker exposure. The AMEIs for this facility are all residential locations, and are therefore identical to the RMEIs. The AMEI (Receptor 696) for cancer risk is located at UTME 575,737, UTMN 4,099,216. It is marked on Figure 2-2. The potential cancer risk at this location is listed in Table 6-2. The AMEI (Receptor 1391) for chronic health hazard is located in the town of Davenport, at UTME 571,937, UTMN 4,096,416. It is marked on Figure 2-3. The potential chronic health hazard at this location is listed in Table 6-2. The AMEI (Receptor 696) for acute health hazard is located at UTME 575,737, UTMN 4,099,216. It is marked on Figure 2-4. The potential acute health hazard at this location is listed in Table 6-2.

* OEHHA. The Air Toxics Hot Spots Program Guidance Manual for Preparation of Health Risk Assessments, August 2003.

-36-

Table 6-3 Potential Health Impacts by Stack and Pathway

Cancer Risk per Million Chronic Health Hazard Index Acute Health Hazard Index Stack Number Stack Name

Exposure Pathwaya PL MC AMEI RMEI PL MC AMEI RMEI PL MC AMEI RMEI

Receptor 2140 2140 696 696 2141 2141 1391 1391 2145 933 696 696 20 Quarry Engines Inhalation 13.1 13.1 1.6 1.6 0.0 0.0 0.0 0.0 0.59 nil 0.4 0.4 14 Finish Mills Inhalation nil nil Nil nil 0.0 0.0 0.0 0.0 nil nil nil nil

13 Gypsum Receiving/ Conveying Inhalation nil nil Nil nil 1.1 1.1 0.2 0.2 nil nil nil nil

2 Main Stack Inhalation nil nil Nil nil 0.0 0.0 0.0 0.0 0.13 1.2 nil nil Total 13.1 13.1 1.7 1.7 1.1 1.1 0.2 0.2 0.7 1.2 0.4 0.4 Significance level 10.0 10.0 10.0 10.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0

PL = Property Line with Highest Risk MC = Maximum Offsite Concentration Point AMEI = Maximum concentration at publicly accessible site where people might spend time RMEI = Maximum Concentration at Existing Residence Note: a Contribution of non-inhalation pathways to all risks is insignificant (less than 1% of the total risk at any receptor).

-37-

6.2.6 Sensitive Receptors The potential health impacts were also calculated at the only identified sensitive receptor, Pacific Elementary School. The estimates are presented in Table 6-4.

Table 6-4 Potential Health Impacts at Sensitive Receptors

Sensitive Receptor Cancer risk

Chronic health hazard index

(respiratory=max)

Acute health hazard index

(respiratory=max)Schools

2165 Pacific Elementary School 3.9 E-7 0.175 0.015 The District requested that the HRA include a discussion of impacts in the town of Davenport under conditions that, in the past, have resulted in complaints. Although this discussion is not within the scope of a HRA, the following discussion is provided in response to the District’s request. During certain periods (usually characterized by strong west-northwest winds), the District has received complaints of odors, identifying the cement plant as the source. Odors have been variously described as “noxious,” “dry natural gas smell,” “sulfur odor,” “like paraffin logs,” “like chlorine,” “burning rubber,” and “chemical odor.” In 1995, the facility worked with the community and the District to identify and reduce odor impacts from the plant. At the time, the compound carbonyl sulfide was identified as causing nuisance odors in the community. Carbonyl sulfide is emitted in small quantities when fuels containing sulfur (e.g., coal) are burned. Even more importantly, the raw material used to make cement contains sulfur, which is released and combusted as part of the cement manufacturing process. Most of the sulfur emitted by CEMEX comes from the raw material, not the coal. While the concentrations of carbonyl sulfide in the air were substantially lower than would cause health concerns, the nuisance caused by the odors was significant enough to lead the facility to increase the height of the main stack. At a cost of $1.5 million, this project substantially decreased the frequency and intensity of odors in the community. The highest one-hour concentrations of the compounds that make up most of the acute health risk at Pacific Elementary School are presented in Table 6-5. Although it does not contribute to the calculated acute health impact, the concentration of carbonyl sulfide is also presented in Table 6-5. These are representative of impacts throughout Davenport.

-38-

Table 6-5 Maximum One-Hour Impacts at Pacific Elementary School

Acrolein 2.9 E-3 μg/cu m Sulfur Dioxide 5.2 E+0 μg/cu m Nitrogen Dioxide 7.0 E+0 μg/cu m Acute Health Hazard Index 0.015 Carbonyl Sulfide 3.0 E-03 μg/cu m

The odor threshold for sulfur dioxide varies from person to person, but it can be as low as 0.1 ppm (290 μg/cu m). The lower end of reported odor thresholds for nitrogen dioxide is approximately 1 ppm (2,070 μg/cu m). The lower end of reported odor thresholds for acrolein is 0.2 ppm (500 μg/cu m). It appears that none of the modeled concentrations are even close to the odor thresholds for the three air contaminants that contribute to acute health impacts. The lower end of reported odor thresholds for carbonyl sulfide is 0.01 ppm (25 μg/cu m), which is about 10,000 times higher than the maximum one-hour average concentration listed in Table 6-5. As indicated above, the District requested that the HRA discuss the modeled concentrations in downtown Davenport under specific meteorological conditions (i.e., strong winds from the northwest). Unfortunately, the software used to prepare this HRA (HARP) does not support such an analysis. HARP calculates the maximum one-hour concentration at each receptor over the entire year; however, it does not record the meterological conditions under which those maximum conditions occur. Nevertheless, the fact that the maximum predicted concentrations are well below odor thresholds indicates that the maximum predicted concentrations under the conditions of concern are also well below the odor thresholds. In other words, the model does not predict odor impacts under the conditions of interest to the District, but the model does show that odor thresholds will not be exceeded under all meteorological conditions evaluated. 6.2.7 Cancer Burden Population exposure can be assessed by determining the number of people at a particular cancer risk level such as 1 x 10-5 or 1 x 10-6. For noncancer risk, it can be the number of people exposed to the Hazard Index over a specified level such as one or five. The traditional way of estimating population exposure for cancer has been the cancer burden or the number of excess cancer cases in the exposed population. The purpose of calculating cancer burden is to identify situations where individual risk is very low, but a lot of people are exposed. When the exposed population is very small, however, calculation of the cancer burden is often deemed unnecessary.

-39-

Because the population around CEMEX is very small, the District has determined that calculation of the cancer burden is not necessary.

APPENDIX A

2004 TOXIC AIR CONTAMINANT EMISSION INVENTORY

A-1

The emission inventory used for this HRA is the 2004 emission inventory, as provided by the District. During the development of this HRA, a number of corrections were made to the inventory, with the approval of the District.

1. Acrolein: The 2004 emission inventory included 53 lb/year of acrolein from the laboratory vent exhaust. Acrolein is a combustion product, and is not emitted by the laboratory. This emission was therefore deleted.

2. Silica: The 2004 emission inventory used very old emission factors to estimate emissions of particulates. These emission factors were developed at a time when many of the limestone handling activities at quarries were not controlled, resulting in very high particulate emissions. All transfer points are now controlled using dust collectors and other techniques, and the emission factors for limestone handling activities are much lower.

3. Carbonyl Sulfide: Under the Hot Spots regulations, pollutants that are emitted less than the “degree of accuracy” may be reported as zero emissions. Carbonyl sulfide emissions from the facility are estimated to be less that 100 lb/year, and as a result were not included in the 2004 inventory. The District has requested that carbonyl sulfide emissions be estimated and included in the HRA.

4. Dioxins and Furans: Five dioxins and furans were detected in a 2004 emission test at the main stack. Although these were not included in the 2004 emission inventory, they have been added to the emission inventory used to conduct the HRA.

APPENDIX B

HEALTH DATA

Source:

The Air Toxics Hot Spots Program Guidance Manual For Preparation Of Health Risk Assessments

Office Of Environmental Health Hazard Assessment

August 2003

Table L1 –OEHHA/ARB Health Values For Use In Hot Spot Facility Risk Assessments

Table L2 – OEHHA/ARB Acute Reference Exposure Values For Use In Hot Spot Facility Risk Assessments

Table L3 – OEHHA/ARB Chronic Inhalation And Oral Reference Exposure Levels And

Target Organs

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

ACETALDEHYDE 75-07-0 9.0E+00 5/93 1.0E-02 4/99 [5/93] 1

ACETAMIDE 60-35-5 7.0E-02 4/99 1 ACROLEIN 107-02-8 1.9E-01 4/99 6.0E-02 1/01 --

ACRYLAMIDE 79-06-1 4.5E+00 4/99 [7/90] 1

ACRYLIC ACID 79-10-7 6.0E+03 4/99

--

ACRYLONITRILE 107-13-1 5.0E+00 12/01 1.0E+00 4/99 [1/91] 1

ALLYL CHLORIDE 107-05-1 2.1E-02 4/99 1 2-AMINOANTHRAQUINONE 117-79-3 3.3E-02 4/99 1 AMMONIA 7664-41-7 3.2E+03 4/99 2.0E+02 2/00 -- ANILINE 62-53-3 5.7E-03 4/99 1 Antimony Compounds 7440-36-0 -- ANTIMONY TRIOXIDE 1309-64-4 --

ARSENIC AND COMPOUNDS (INORGANIC) TAC ¨

7440-38-2 1016

[1015] 1.9E-01

AveP 4/99 3.0E-02 1/01 3.0E-04 10/00 1.2E+01 TAC 7/90 1.5E+00 10/00 1

ARSINE 7784-42-1 1.6E+02 4/99 --

ASBESTOSTAC ³ 1332-21-4 1.9E-04

TAC³ 3/86 333.33³

BENZENETAC 71-43-2 1.3E+03

AveP 4/99 6.0E+01 2/00 1.0E-01

TAC 1/85 1 BENZIDINE (AND ITS SALTS) values also apply to: 92-87-5 5.0E+02 4/99

[1/91] 1

Benzidine based dyes 1020 5.0E+02 4/99 [1/91] 1

Direct Black 38 1937-37-7 5.0E+02 4/99 [1/91] 1

Direct Blue 6 2602-46-2 5.0E+02 4/99 [1/91] 1

Direct Brown 95 (technical grade) 16071-86-6 5.0E+02 4/99 [1/91] 1

BENZYL CHLORIDE 100-44-7 4E+02 4/99 1.7E-01 4/99 1

BERYLLIUM AND COMPOUNDS ¨ 7440-41-7 [1021] 7.0E-03 12/01 2.0E-03 12/01 8.4E+00 4/99

[7/90] 1

BIS(2-CHLOROETHYL)ETHER (Dichloroethyl ether) 111-44-4 2.5E+00 4/99 1

BIS(CHLOROMETHYL)ETHER 542-88-1 4.6E+01 4/99 [1/91] 1

1,3-BUTADIENETAC 106-99-0 2.0E+01 1/01 6.0E-01

TAC 7/92 1

B-1

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-4

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

CADMIUM AND COMPOUNDSTAC 7440-43-9 [1045] 2.0E-02 1/01 5.0E-04 10/00 1.5E+01

TAC 1/87 1

CARBON DISULFIDE 75-15-0 6.2E+03

AveP 4/99 8.0E+02 RfC

-- CARBON MONOXIDE 630-08-0 2.3E+04 4/99 -- CARBON TETRACHLORIDETAC (Tetrachloromethane) 56-23-5 1.9E+03

AveP 4/99 4.0E+01 1/01 1.5E-01 TAC 9/87 1

CHLORINATED PARAFFINS 108171-26-2 8.9E-02 4/99 1 CHLORINE 7782-50-5 2.1E+02 4/99 2.0E-01 2/00 -- CHLORINE DIOXIDE 10049-04-4 6.0E-01 1/01 -- 4-CHLORO-O-PHENYLENEDIAMINE 95-83-0 1.6E-02 4/99 1 CHLOROBENZENE 108-90-7 1.0E+03 1/01 -- CHLORODIFLUOROMETHANE

... (see Fluorocarbons) CHLOROFORM TAC 67-66-3 1.5E+02

AveP 4/99 3.0E+02 4/00 1.9E-02 TAC 12/90 1

Chlorophenols 1060 -- PENTACHLOROPHENOL 87-86-5 1.8E-02 4/99 1

2,4,6-TRICHLOROPHENOL 88-06-2 7.0E-02 4/99 [1/91] 1

CHLOROPICRIN 76-06-2 2.9E+01 4/99 4.0E-01 12/01 -- CHLOROPRENE 126-99-8 -- p-CHLORO-o-TOLUIDINE 95-69-2 2.7E-01 4/99 1

CHROMIUM 6+TAC ¨ values also apply to: 18540-29-9 2.0E-01 1/01 2.0E-02 10/00 5.1E+02 TAC 1/86 1

Barium chromate 10294-40-3 2.0E-01 1/01 2.0E-02 10/00 5.1E+02 TAC 1/86 0.2053

Calcium chromate 13765-19-0 2.0E-01 1/01 2.0E-02 10/00 5.1E+02 TAC 1/86 0.3332

Lead chromate¨ 7758-97-6 2.0E-01 1/01 2.0E-02 10/00 5.1E+02 TAC 1/86 0.1609

Sodium dichromate¨ 10588-01-9 2.0E-01 1/01 2.0E-02 10/00 5.1E+02 TAC 1/86 0.397

Strontium chromate 7789-06-2 2.0E-01 1/01 2.0E-02 10/00 5.1E+02 TAC 1/86 0.2554

CHROMIUM TRIOXIDE (as chromic acid mist) 1333-82-0 2.0E-03 1/01 2.0E-02 10/00 5.1E+02

TAC 1/86 0.52

COPPER AND COMPOUNDS 7440-50-8 [1067] 1.0E+02 4/99 --

p-CRESIDINE 120-71-8 1.5E-01 4/99 1 CRESOLS (mixtures of) 1319-77-3 6.0E+02 1/01 -- m-CRESOL 108-39-4 6.0E+02 1/01 --

B-2

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-5

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

o-CRESOL 95-48-7 6.0E+02 1/01 -- p-CRESOL 106-44-5 6.0E+02 1/01 -- CUPFERRON 135-20-6 2.2E-01 4/99 1

Cyanide Compounds (inorganic) 57-12-5 1073 3.4E+02 4/99 9.0E+00 4/00 --

HYDROGEN CYANIDE (Hydrocyanic acid) 74-90-8 3.4E+02 4/99 9.0E+00 4/00 --

2,4-DIAMINOANISOLE 615-05-4 2.3E-02 4/99 1 2,4-DIAMINOTOLUENE 95-80-7 4.0E+00 4/99 1 1,2-DIBROMO-3-CHLOROPROPANE (DBCP) 96-12-8 7.0E+00 4/99

[1/92] 1

p-DICHLOROBENZENE 106-46-7 8.0E+02 1/01 4.0E-02 4/99 [1/91] 1

3,3-DICHLOROBENZIDINE 91-94-1 1.2E+00 4/99 [1/91] 1

1,1,-DICHLOROETHANE (Ethylidene dichloride) 75-34-3 5.7E-03 4/99 1

1,1-DICHLOROETHYLENE … (see Vinylidene Chloride)

DI(2-ETHYLHEXYL)PHTHALATE (DEHP) 117-81-7 8.4E-03 4/99 [1/92] 8.4E-03 10/00 1

DIESEL EXHAUST … (see Particulate Emissions from Diesel-Fueled Engines) DIETHANOLAMINE 111-42-2 3.0E+00 12/01 -- DIMETHYLAMINE 124-40-3 -- p-DIMETHYLAMINOAZOBENZENE 60-11-7 4.6E+00 4/99 1 N,N-DIMETHYL FORMAMIDE 68-12-2 8.0E+01 1/01 -- 2,4-DINITROTOLUENE 121-14-2 3.1E-01 4/99 1 1,4-DIOXANE (1,4-Diethylene dioxide) 123-91-1 3.0E+03 4/99 3.0E+03 4/00 2.7E-02 4/99

[1/91] 1

EPICHLOROHYDRIN (1-Chloro-2,3-epoxypropane) 106-89-8 1.3E+03 4/99 3.0E+00 1/01 8.0E-02 4/99

[1/92] 1

1,2-EPOXYBUTANE 106-88-7 2.0E+01 1/01 -- ETHYL ACRYLATE 140-88-5 -- ETHYL BENZENE 100-41-4 2.0E+03 2/00 -- ETHYL CHLORIDE (Chloroethane) 75-00-3 3.0E+04 4/00 -- ETHYLENE DIBROMIDETAC (1,2-Dibromoethane) 106-93-4 8.0E-01 12/01

2.5E-01 TAC 7/85 1

B-3

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-6

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

ETHYLENE DICHLORIDETAC (1,2-Dichloroethane) 107-06-2 4.0E+02 1/01

7.2E-02 TAC 9/85 1

ETHYLENE GLYCOL 107-21-1 4.0E+02 4/00 -- ETHYLENE GLYCOL BUTYL ETHER

… (see Glycol ethers)

ETHYLENE OXIDETAC (1,2-Epoxyethane) 75-21-8 3.0E+01 1/01 3.1E-01

TAC 11/87 1

ETHYLENE THIOUREA 96-45-7 4.5E-02 4/99 1 Fluorides 1101 2.4E+02 4/99 1.3E+01 8/03 4.0E-2 8/03 --

HYDROGEN FLUORIDE (Hydrofluoric acid) 7664-39-3 2.4E+02 4/99 1.4E+01 8/031 4.0E-2 --

FORMALDEHYDETAC 50-00-0 9.4E+01 4/99 3.0E+00 2/00 2.1E-02

TAC 3/92 1

GASOLINE VAPORS 1110 -- GLUTARALDEHYDE 111-30-8 8.0E-02 1/01 -- GLYCOL ETHERS 1115

ETHYLENE GLYCOL MONOBUTYL ETHER – EGBE 111-76-2 1.4E+04 4/99 --

ETHYLENE GLYCOL MONOETHYL ETHER – EGEE 110-80-5 3.7E+02

AveP 4/99[1/92] 7.0E+01 2/00 --

ETHYLENE GLYCOL MONOETHYL ETHER ACETATE – EGEEA 111-15-9 1.4E+02

AveP 4/99 3.0E+02 2/00 --

ETHYLENE GLYCOL MONOMETHYL ETHER – EGME 109-86-4 9.3E+01

AveP 4/99 6.0E+01 2/00 --

ETHYLENE GLYCOL MONOMETHYL ETHER ACETATE – EGMEA

110-49-6

9.0E+01 2/00

--

HEXACHLOROBENZENE 118-74-1 1.8E+00 4/99 [1/91] 1

HEXACHLOROCYCLOHEXANES (mixed or technical grade)

608-73-1 1120 4.0E+00 4/99

[1/91] 4.0E+00 10/00 [1/92] 1

Alpha-HEXACHLOROCYCLOHEXANE 319-84-6 4.0E+00 4/99

[1/91] 4.0E+00 10/00 [1/92] 1

beta- HEXACHLOROCYCLOHEXANE 319-85-7 4.0E+00 4/99 [1/91] 4.0E+00 10/00

[1/92] 1

Gamma-HEXACHLOROCYCLOHEXANE (Lindane)

58-89-9 1.1E+00 4/99 1.1E+00 10/00 1

B-4

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-7

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

n-HEXANE 110-54-3 7.0E+03 4/00 --

HYDRAZINE 302-01-2 2.0E-01 1/01 1.7E+01 4/99 [7/90] 1

HYDROCHLORIC ACID (Hydrogen chloride) 7647-01-0 2.1E+03 4/99 9.0E+00 2/00 -- HYDROGEN BROMIDE

… (see Bromine & Compounds) HYDROGEN CYANIDE

… (see Cyanide & Compounds) HYDROGEN FLUORIDE

… (see Fluorides) HYDROGEN SELENIDE

… (see Selenium & Compounds) HYDROGEN SULFIDE 7783-06-4 4.2E+01 4/99[7/90] 1.0E+01 4/00 -- ISOPHORONE 78-59-1 2.0E+03 12/01 -- ISOPROPYL ALCOHOL (Isopropanol) 67-63-0 3.2E+03 4/99 7.0E+03 2/00 --

LEAD AND COMPOUNDSTAC W ¨

(inorganic) values also apply to:

7439-92-1 1128

[1130] 4.2E-02

TAC 4/97 8.5E-03 10/00 1

Lead acetate 301-04-2 4.2E-02

TAC 4/97 8.5E-03 10/00 0.637

Lead phosphate 7446-27-7 4.2E-02

TAC 4/97 8.5E-03 10/00 0.7659

Lead subacetate 1335-32-6 4.2E-02

TAC 4/97 8.5E-03 10/00 0.7696

LINDANE ... (see gamma-Hexachlorocyclohexane)

MALEIC ANHYDRIDE 108-31-6 7.0E-01 12/01 --

MANGANESE AND COMPOUNDS 7439-96-5 [1132] 2.0E-01 4/00 --

MERCURY AND COMPOUNDS (INORGANIC)

7439-97-6 [1133] 1.8E+00 4/99 9.0E-02 2/00 3.0E-04 10/00

[1/92] --

Mercuric chloride 7487-94-7 1.8E+00 4/99 9.0E-02 2/00 3.0E-04 10/00 [1/92] --

MERCURY AND COMPOUNDS (ORGANIC) values also apply to: N/A

METHYL MERCURY 593-74-8 -- METHANOL 67-56-1 2.8E+04 4/99 4.0E+03 4/00 -- METHYL BROMIDE (Bromomethane) 74-83-9 3.9E+03 4/99 5.0E+00 2/00 -- METHYL tertiary-BUTYL ETHER 1634-04-4 8.0E+03 2/00 9.1E-04 11/99 1 METHYL CHLOROFORM (1,1,1-Trichloroethane) 71-55-6 6.8E+04 4/99 1.0E+03 2/00 --

B-5

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-8

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

METHYL ETHYL KETONE (2-Butanone) 78-93-3 1.3E+04 4/99 -- METHYL ISOCYANATE 624-83-9 1.0E+00 12/01 -- METHYL MERCURY

... (see Mercury & Compounds)

METHYL METHACRYLATE 80-62-6 -- 4,4'-METHYLENE BIS (2-CHLOROANILINE) (MOCA) 101-14-4 1.5E+00 4/99 1

METHYLENE CHLORIDE TAC (Dichloromethane) 75-09-2 1.4E+04 4/99 4.0E+02 2/00

3.5E-03 TAC 7/89 1

4,4'-METHYLENE DIANILINE (AND ITS DICHLORIDE) 101-77-9 2.0E+01 12/01 1.6E+00 4/99 1.6E+00 10/00 1

METHYLENE DIPHENYL ISOCYANATE 101-68-8 7.0E-01 1/01 -- MICHLER'S KETONE (4,4’-Bis(dimethylamino)benzophenone) 90-94-8 8.6E-01 4/99 1

N-NITROSO-n-BUTYLAMINE 924-16-3 1.1E+01 4/99 [1/92] 1

N-NITROSODI-n-PROPYLAMINE 621-64-7 7.0E+00 4/99 [1/91] 1

N-NITROSODIETHYLAMINE 55-18-5 3.6E+01 4/99 [1/91] 1

N-NITROSODIMETHYLAMINE 62-75-9 1.6E+01 4/99 [1/91] 1

N-NITROSODIPHENYLAMINE 86-30-6 9.0E-03 4/99 1

N-NITROSO-N-METHYLETHYLAMINE 10595-95-6 2.2E+01 4/99 [7/90] 1

N-NITROSOMORPHOLINE 59-89-2 6.7E+00 4/99 [7/92] 1

N-NITROSOPIPERIDINE 100-75-4 9.4E+00 4/99 [7/92] 1

N-NITROSOPYRROLIDINE 930-55-2 2.1E+00 4/99 [7/90] 1

NAPHTHALENE ... (see Polycyclic aromatic hydrocarbons)

NICKEL AND COMPOUNDSTAC ¨ values also apply to:

7440-02-0 [1145] 6.0E+00 4/99 5.0E-02 2/00 5.0E-02 10/00 9.1E-01

TAC 8/91 1

Nickel acetate 373-02-4 6.0E+00 4/99 5.0E-02 2/00 5.0E-02 10/00 9.1E-01 TAC 8/91 0.3321

Nickel carbonate 3333-39-3 6.0E+00 4/99 5.0E-02 2/00 5.0E-02 10/00 9.1E-01 TAC 8/91 0.4945

Nickel carbonyl 13463-39-3 6.0E+00 4/99 5.0E-02 2/00 5.0E-02 10/00 9.1E-01 TAC 8/91 0.3438

Nickel hydroxide 12054-48-7 6.0E+00 4/99 5.0E-02 2/00 5.0E-02 10/00 9.1E-01 TAC 8/91 0.6332

B-6

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-9

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

Nickelocene 1271-28-9 6.0E+00 4/99 5.0E-02 2/00 5.0E-02 10/00 9.1E-01 TAC 8/91 0.4937

NICKEL OXIDE 1313-99-1 6.0E+00 4/99 1.0E-01 2/00 5.0E-02 10/00 9.1E-01 TAC 8/91 0.7859

Nickel refinery dust from the pyrometallurgical process 1146 6.0E+00 4/99 5.0E-02 2/00 5.0E-02 10/00 9.1E-01

TAC 8/91 1

Nickel subsulfide 12035-72-2 6.0E+00 4/99 5.0E-02 2/00 5.0E-02 10/00 9.1E-01 TAC 8/91 0.2443

NITRIC ACID 7697-37-2 8.6E+01 4/99 -- NITROGEN DIOXIDE 10102-44-0 4.7E+02 4/99[1/92] -- 2-NITROPROPANE 79-46-9 -- p-NITROSODIPHENYLAMINE 156-10-5 2.2E-02 4/99 1 OZONE 10028-15-6 1.8E+02 4/99[1/92] -- PARTICULATE EMISSIONS FROM DIESEL-FUELED ENGINESTAC n 9901 5.0E+00

TAC 8/98 1.1E+00 TAC 8/98 1

PENTACHLOROPHENOL ... (see Chlorophenols)

PERCHLOROETHYLENETAC (Tetrachloroethylene) 127-18-4 2.0E+04 4/99 3.5E+01

TAC 10/91 2.1E-02 TAC 10/91 1

PHENOL 108-95-2 5.8E+03 4/99 2.0E+02 4/00 -- PHOSGENE 75-44-5 4.0E+00 4/99 --

PHOSPHINE 7803-51-2 8.0E-01

9/02 --

PHOSPHORIC ACID 7664-38-2 7.0E+00 2/00 -- PHTHALIC ANHYDRIDE 85-44-9 2.0E+01 1/01 -- PCB (POLYCHLORINATED BIPHENYLS-unspeciated mixture) [lowest risk] H 1336-36-3 7.0E-02 2/02 7.0E-02

2/02 1

PCB (POLYCHLORINATED BIPHENYLS-unspeciated mixture) [low risk] H 1336-36-3 4.0E-01 2/02 4.0E-01

2/02 1

PCB (POLYCHLORINATED BIPHENYLS -unspeciated mixture) [high risk] H 1336-36-3 2.0E+00 2/02 2.0E+00

2/02 1

PCB (POLYCHLORINATED BIPHENYLS (speciated)∇

3,3’,4,4’-TETRACHLOROBIPHENYL (77) 35298-13-3 4.0E-01 8/03 1.0E –04 8/03 1.3E +01 8/03 1.3E +01 8/03 3,4,4’,5-TETRACHLOROBIPHENYL (81) 70362-50-4 4.0E-01 8/03 1.0E –04 8/03 1.3E +01 8/03 1.3E +01 8/03 2,3,3’,4,4’- PENTACHLOROBIPHENYL (105)

32598-14-4 4.0E-01 8/03 1.0E –04 8/03 1.3E +01 8/03 1.3E +01 8/03

2,3,4,4’5- PENTACHLOROBIPHENYL (114) 74472-37-0 8.0E-02 8/03 2.0E –05 8/03 6.5E +01 8/03 6.5E +01 8/03 2,3’4,4’,5- PENTACHLOROBIPHENYL (118)

31508-00-6 4.0E-01 8/03 1.0E –04 8/03 1.3E +01 8/03 1.3E +01 8/03

B-7

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-10

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

2’,3,4,4’,5- PENTACHLOROBIPHENYL (123)

65510-44-3 4.0E-01 8/03 1.0E –04 8/03 1.3E +01 8/03 1.3E +01 8/03

3,3’,4,4’,5- PENTACHLOROBIPHENYL (126)

57465-28-8 4.0E-04 8/03 1.0E –07 8/03 1.3E +04 8/03 1.3E +04 8/03

2,3,3’,4,4’,5-HEXACHLOROBIPHENYL (156)

38380-08-4 8.0E-02 8/03 2.0E –05 8/03 6.5E +01 8/03 6.5E +01 8/03

2,3,3’,4,4’,5’-HEXACHLOROBIPHENYL (157)

69782-90-7 8.0E-02 8/03 2.0E –05 8/03 6.5E +01 8/03 6.5E +01 8/03

2,3’,4,4’,5,5’-HEXACHLOROBIPHENYL (167)

52663-72-6 4.0E-00 8/03 1.0E –03 8/03 1.3E +00 8/03 1.3E +00 8/03

3,3’,4,4’5,5’- HEXACHLOROBIPHENYL (169)

32774-16-6 4.0E-03 8/03 1.0E –06 8/03 1.3E +03 8/03 1.3E +03 8/03

2,3,3’4,4’,5,5’- HEPTACHLOROBIPHENYL (189)

39635-31-9 4.0E-01 8/03 1.0 E-04 8/03 1.3E +01 8/03 1.3E +01 8/03

POLYCHLORINATED DIBENZO-P-DIOXINS (PCDD) (AS 2,3,7,8-PCDD EQUIVALENT)TAC •

1085 1086

2,3,7,8-TETRACHLORODIBENZO-P-DIOXINTAC 1746-01-6 4.0E-05 2/00 1.0E-08 10/00 1.3E+05

TAC 8/86 1.3E+05 TAC 8/86 1

1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 40321-76-4 8.0E-05 2/00 2.0E-08 10/00

1.3E+05 4/99 1.3E+05 10/00 1

1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 39227-28-6 4.0E-04 2/00 1.0E-07 10/00 1.3E+04 4/99 1.3E+04 10/00 1

1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 57653-85-7 4.0E-04 2/00 1.0E-07 10/00 1.3E+04 4/99 1.3E+04 10/00 1

1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 19408-74-3 4.0E-04 2/00 1.0E-07 10/00 1.3E+04 4/99 1.3E+04 10/00 1

1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 35822-46-9 4.0E-03 2/00 1.0E-06 10/00 1.3E+03 4/99 1.3E+03 10/00 1

1,2,3,4,6,7,8,9-OCTACHLORODIBENZO-P-DIOXIN 3268-87-9 4.0E-02 2/00 1.0E-05 10/00 1.3E+01 4/99 1.3E+01 10/00 1

POLYCHLORINATED DIBENZOFURANS (AS 2,3,7,8-PCDD EQUIVALENT)

(PCDF) TAC • 1080

2,3,7,8-TETRACHLORODIBENZOFURAN 5120-73-19 4.0E-04 2/00 1.0E-07 10/00 1.3E+04 4/99 1.3E+04 10/00 1

1,2,3,7,8-PENTACHLORODIBENZOFURAN 57117-41-6 8.0E-04 2/00 2.0E-07 10/00 6.5E+03 4/99 6.5E+03 10/00 1

2,3,4,7,8-PENTACHLORODIBENZOFURAN 57117-31-4 8.0E-05 2/00 2.0E-08 10/00 6.5E+04 4/99 6.5E+04 10/00 1

1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 70648-26-9 4.0E-04 2/00 1.0E-07 10/00 1.3E+04 4/99 1.3E+04 10/00 1

B-8

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-11

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 57117-44-9 4.0E-04 2/00 1.0E-07 10/00 1.3E+04 4/99 1.3E+04 10/00 1

1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 72918-21-9 4.0E-04 2/00 1.0E-07 10/00 1.3E+04 4/99 1.3E+04 10/00 1

2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 60851-34-5 4.0E-04 2/00 1.0E-07 10/00 1.3E+04 4/99 1.3E+04 10/00 1

1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 67562-39-4 4.0E-03 2/00 1.0E-06 10/00 1.3E+03 4/99 1.3E+03 10/00 1

1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 55673-89-7 4.0E-03 2/00 1.0E-06 10/00 1.3E+03 4/99 1.3E+03 10/00 1

1,2,3,4,6,7,8,9-OCTACHLORODIBENZOFURAN 39001-02-0 4.0E-02 2/00 1.0E-05 10/00 1.3E+01 4/99 1.3E+01 10/00 1

POLYCYCLIC AROMATIC HYDROCARBON (PAH)

1150 1151

BENZ(A)ANTHRACENEv 56-55-3 3.9E-01 4/99 [4/94] 1.2E+00 10/00

[4/94] 1

BENZO(A)PYRENEv 50-32-8 3.9E+00 4/99 [4/94] 1.2E+01 10/00

[4/94] 1

BENZO(B)FLUORANTHENEv 205-99-2 3.9E-01 4/99 [4/94] 1.2E+00 10/00

[4/94] 1

BENZO(J)FLUORANTHENEv 205-82-3 3.9E-01 4/99 [4/94] 1.2E+00 10/00

[4/94] 1

BENZO(K)FLUORANTHENEv 207-08-9 3.9E-01 4/99 [4/94] 1.2E+00 10/00

[4/94] 1

CHRYSENEv 218-01-9 3.9E-02 4/99 [4/94] 1.2E-01 10/00

[4/94] 1

DIBENZ(A,H)ACRIDINEv 226-36-8 3.9E-01 4/99 [4/94] 1.2E+00 10/00

[4/94] 1

DIBENZ(A,H)ANTHRACENEv 53-70-3 4.1E+00 4/99 [4/94] 4.1E+00 10/00

[4/94] 1

DIBENZ(A,J)ACRIDINEv 224-42-0 3.9E-01 4/99 [4/94] 1.2E+00 10/00

[4/94] 1

DIBENZO(A,E)PYRENEv 192-65-4 3.9E+00 4/99 [4/94] 1.2E+01 10/00

[4/94] 1

DIBENZO(A,H)PYRENEv 189-64-0 3.9E+01 4/99 [4/94] 1.2E+02 10/00

[4/94] 1

B-9

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-12

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

DIBENZO(A,I)PYRENEv 189-55-9 3.9E+01 4/99 [4/94] 1.2E+02 10/00

[4/94] 1

DIBENZO(A,L)PYRENEv 191-30-0 3.9E+01 4/99 [4/94] 1.2E+02 10/00

[4/94] 1

7H-DIBENZO(C,G)CARBAZOLEv 194-59-2

3.9E+00 4/99 [4/94]

1.2E+01 10/00 [4/94] 1

7,12-DIMETHYLBENZ(A)ANTHRACENEv 57-97-6 2.5E+02 4/99

[4/94] 2.5E+02 10/00 [4/94] 1

1,6-DINITROPYRENEv 42397-64-8 3.9E+01 4/99 [4/94] 1.2E+02 10/00

[4/94] 1

1,8-DINITROPYRENEv 42397-65-9 3.9E+00 4/99 [4/94] 1.2E+01 10/00

[4/94] 1

INDENO(1,2,3-C,D)PYRENEv 193-39-5 3.9E-01 4/99 [4/94] 1.2E+00 10/00

[4/94] 1

3-METHYLCHOLANTHRENEv 56-49-5 2.2E+01 4/99 [4/94] 2.2E+01 10/00

[4/94] 1

5-METHYLCHRYSENEv 3697-24-3 3.9E+00 4/99 [4/94] 1.2E+01 10/00

[4/94] 1

NAPHTHALENE 91-20-3 9.0E+00 4/00 --

5-NITROACENAPHTHENEv 602-87-9 1.3E-01 4/99 [4/94] 1.3E-01 10/00

[4/94] 1

6-NITROCHRYSENEv 7496-02-8 3.9E+01 4/99 [4/94] 1.2E+02 10/00

[4/94] 1

2-NITROFLUORENEv 607-57-8 3.9E-02 4/99 [4/94] 1.2E-01 10/00

[4/94] 1

1-NITROPYRENEv 5522-43-0 3.9E-01 4/99 [4/94] 1.2E+00 10/00

[4/94] 1

4-NITROPYRENEv 57835-92-4 3.9E-01 4/99 [4/94] 1.2E+00 10/00

[4/94] 1

POTASSIUM BROMATE.... ... (see Bromine & Compounds)

1,3-PROPANE SULTONE 1120-71-4 2.4E+00 4/99 1 PROPYLENE (PROPENE) 115-07-1 3.0E+03 4/00 -- PROPYLENE GLYCOL MONOMETHYL ETHER 107-98-2 7.0E+03 2/00 --

PROPYLENE OXIDE 75-56-9 3.1E+03 4/99 3.0E+01 2/00 1.3E-02 4/99 [7/90] 1

SELENIUM AND COMPOUNDS 7782-49-2 [1170] 2.0E+01 12/01 --

HYDROGEN SELENIDE 7783-07-5 5.0E+00 4/99 -- Selenium sulfide 7446-34-6 2.0E+01 12/01 -- SODIUM HYDROXIDE 1310-73-2 8.0E+00 4/99 4.8E+00 7/90 --

B-10

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-13

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

STYRENE 100-42-5 2.1E+04 4/99 9.0E+02 4/00 -- SULFATES 9960 1.2E+02 4/99 2.5E+01 1/92 -- SULFUR DIOXIDE 7446-09-5 6.6E+02 4/99[1/92] 6.6E+02 1/92 -- SULFURIC ACID AND OLEUM 7664-93-9 1.2E+02 4/99 1.0E+00 12/01 -- SULFURIC ACID 7664-93-9 1.2E+02 4/99 1.0E+00 12/01 -- SULFUR TRIOXIDE 7446-71-9 1.2E+02 4/99 -- OLEUM 8014-95-7 1.2E+02 4/99 1.0E+00 12/01 -- 1,1,2,2-TETRACHLOROETHANE 79-34-5 2.0E-01 4/99 1 TETRACHLOROPHENOLS

... (see Chlorophenols) 2,4,5-TRICHLOROPHENOL

... (see Chlorophenols) 2,4,6-TRICHLOROPHENOL

... (see Chlorophenols) THIOACETAMIDE 62-55-5 6.1E+00 4/99 1 TOLUENE 108-88-3 3.7E+04 4/99 3.0E+02 4/00 --

Toluene diisocyantates 26471-62-5 1204 7.0E-02 1/01 3.9E-02 4/99 1

TOLUENE-2,4-DIISOCYANATE 584-84-9 7.0E-02 1/01 3.9E-02 4/99 1 TOLUENE-2,6-DIISOCYANATE 91-08-7 7.0E-02 1/01 3.9E-02 4/99 1 1,1,2-TRICHLOROETHANE (Vinyl trichloride) 79-00-5 5.7E-02 4/99 1

TRICHLOROETHYLENETAC 79-01-6 6.0E+02 4/00 7.0E-03

TAC 10/90 1

TRIETHYLAMINE 121-44-8 2.8E+03 4/99 2.0E+02 9/02 --

URETHANE (Ethyl carbamate) 51-79-6 1.0E+00 4/99 [7/90] 1

Vanadium Compounds N/A Vanadium (fume or dust) 7440-62-2 3.0E+01 4/99 -- VANADIUM PENTOXIDE 1314-62-1 3.0E+01 4/99 -- VINYL ACETATE 108-05-4 2.0E+02 12/01 --

VINYL CHLORIDETAC (Chloroethylene) 75-01-4 1.8E+05 4/99 2.7E-01

TAC 12/90 1

VINYLIDENE CHLORIDE (1,1-Dichloroethylene)

75-35-4 7.0E+01 1/01

--

B-11

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-14

Noncancer Effects Cancer Risk

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Inhalation

REL (µg/m3)

Date u

Value Reviewed

[Added]

Chronic Oral REL

(mg/kg/d)

Date u

Value Reviewed

[Added]

Inhalation Cancer Potency Factor

(mg/kg-d)-1

Date u

Value Reviewed

[Added]

Oral Slope Factor

(mg/kg-d)-1

Date u Value

Reviewed

[Added]

M¨ W A F

XYLENES (mixed isomers) 1330-20-7 1210 2.2E+04 4/99 7.0E+02 4/00 --

m-XYLENE 108-38-3 2.2E+04 4/99 7.0E+02 4/00 -- o-XYLENE 95-47-6 2.2E+04 4/99 7.0E+02 4/00 -- p-XYLENE 106-42-3 2.2E+04 4/99 7.0E+02 4/00 --

B-12

APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-15

Purpose: The purpose of this reference table is to provide a quick list of all health values that have been approved by the Office of Environmental Health Hazard Assessment (OEHHA) and the Air Resources Board (ARB) for use in facility health risk assessments conducted for the AB 2588 Air Toxics Hot Spots Program. The OEHHA has developed and adopted new risk assessment guidelines that update and replace the California Air Pollution Control Officers Association’s (CAPCOA) Air Toxics “Hot Spots” Program Revised 1992 Risk Assessment Guidelines, October 1993. The OEHHA has adopted five technical support documents for these guidelines. This table lists the OEHHA adopted inhalation and oral cancer slope factors, noncancer acute Reference Exposure Levels (RELs), and inhalation and oral noncancer chronic RELs. In addition, it lists the substances in Appendix A-I (Substances For Which Emissions Must Be Quantified) and Appendix F (Criteria For Inputs For Risk Assessment Using Screening Air Dispersion Modeling) of the ARB’s Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines (EICG). OEHHA is still in the process of adopting new noncancer chronic RELs. Therefore, new health values will periodically be added to, or deleted from, this table. Users of this table are advised to monitor the OEHHA website (www.oehha.ca.gov) for any updates to the health values.

b Substances written in italics do not have explicit OEHHA approved health values, but are included in this table to clarify applicability of OEHHA adopted heath effects values to individual or grouped substances listed in the Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines, Appendix A-I list of “Substances For Which Emissions Must Be Quantified”.

t Chemical Abstract Service Number (CAS): For chemical groupings and mixtures where a CAS number is not applicable, the 4-digit code used in the Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines (EICG) Report is listed. The 4-digit codes enclosed in brackets [ ] are codes that have been phased out, but may still appear on previously reported Hot Spots emissions. For information on the origin and use of the 4-digit code, see the EICG report.

u Date Value Reviewed [Added]: These columns list the date that the health value was last reviewed by OEHHA and the Scientific Review Panel, and/or approved for use in the AB 2588 Air Toxics Hot Spots Program. If the health value is unchanged since it was first approved for use in the Hot Spots Program, then the date that the value was first approved for use by CAPCOA is listed within the brackets [ ].

• April 1999 is listed for the cancer potency values and noncancer acute RELs, which have been adopted by the OEHHA as part of the AB 2588 “Hot Spot” Risk Assessment Guidelines. • February 2000, April 2000, January 2001, and December 2001 are listed for the first set of 22, the second set of 16, the third set of 22, and the fourth set of 12 noncancer chronic RELs, respectively. • October 2000 is listed for the oral chronic RELs and oral cancer slope factors. 1996 is listed for the U.S. EPA Reference Concentrations. Dates of 1990-1992 and 1996 are listed for CAPCOA chronic RELs,

which may eventually be dropped or replaced. • For the substances identified as Toxic Air Contaminants, the Air Resources Board hearing date is listed. The dates for acetaldehyde, benzo[a]pyrene, and methyl tertiary-butyl ether represent the dates the values

were approved by the Scientific Review Panel. ♣ Molecular Weight Adjustment Factor: Molecular weight adjustment factors (MWAF) are only to be used when a toxic metal has a cancer potency factor. For most of the Hot Spots toxic metals, the OEHHA cancer

potency factor applies to the weight of the toxic metal atom contained in the overall compound. Some of the Hot Spots compounds contain various elements along with the toxic metal atom (e.g., “Nickel hydroxide”, CAS number 12054-48-7, has a formula of H2NiO2). Therefore, an adjustment to the reported pounds of the overall compound is needed before applying the OEHHA cancer potency factor for “Nickel and compounds” to such a compound. This ensures that the cancer potency factor is applied only to the fraction of the overall weight of the emissions that are associated with health effects of the metal. In other cases, the Hot Spots metals are already reported as the metal atom equivalent (e.g., CAS 7440-02-0, “Nickel”), and these cases do not use any further molecular weight adjustment. (Refer to Note [7] in Appendix A, List of Substances in the EICG Report for further information on how the emissions of various Hot Spots metal compounds are reported.) The appropriate molecular weight adjustment factors (MWAF) to be used along with the OEHHA cancer potency factors for Hot Spots metals can be found in the MWAF column of this table. A double dash (--) was entered into the column if the substance does not currently have a cancer potency factor. So, for example, assume 100 pounds of “Nickel hydroxide” emissions are reported under CAS number 12054-48-7. To get the Nickel atom equivalent of these emissions, multiply by the listed MWAF (0.6332) for Nickel hydroxide:

• 100 pounds x 0.6332 = 63.32 pounds of Nickel atom equivalent This step should be completed prior to applying the OEHHA cancer potency factor for “Nickel and compounds” in a calculation for a prioritization score or risk assessment calculation. (For more information see Chapter 4 and Appendix H of OEHHA’s The Air Toxics Hot Spots Program Risk Assessment Guidelines; Part V; Technical Support Document; Guidance Manual for Preparation of Health Risk Assessments.) Note: The value listed in the MWAF column for Asbestos is not a molecular weight adjustment. This is a conversion factor for adjusting mass to fibers or structures. See Appendix C of OEHHA’s The Air Toxics Hot Spots Program Risk Assessment Guidelines; Part V; Technical Support Document; Guidance Manual for Preparation of Health Risk Assessments for more information on Asbestos, or see the EICG report for reporting guidance. Also see the Asbestos footnote (designated by the symbol ³)

N/A Not Applicable ∇ Values calculated using WHO TEF procedure in OEHHA, 2003 TAC Toxic Air Contaminant: The Air Resources Board has identified this substance as a Toxic Air Contaminant.

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APPENDIX L - TABLE 1 OEHHA/ARB APPROVED HEALTH VALUES FOR USE IN HOT SPOT FACILITY RISK ASSESSMENTS b

Appendix L-16

AveP The averaging period of noncancer acute RELs is generally a one-hour exposure. However, some are based on several hour exposure for reproduct ive/developmental endpoints (see section 1.6 of OEHHA’s technical support document for The Determination of Acute Reference Exposure Levels for Airborne Toxicants, March 1999). Typically the RELs for the following substances are compared to modeled emission concentrations of the same duration rather than maximum one-hour concentrations (e.g., a 4-hour REL should be compared to the maximum 4-hour average concentration from the air dispersion model).

4-Hour: Arsenic and Inorganic Arsenic Compounds

6-Hour: Benzene, Carbon disulfide, Ethylene glycol monoethyl ether, Ethylene glycol monoethyl ether acetate, Ethylene glycol monomethyl ether

7-Hour: Carbon tetrachloride, Chloroform

³ Asbestos: The units for the Inhalation Cancer Potency factor for asbestos are (100 PCM fibers/m3)-1. A conversion factor of 100 fibers/0.003 µg can be multiplied by a receptor concentration of asbestos expressed in µg/m3. Unless other information necessary to estimate the concentration (fibers/m 3) of asbestos at receptors of interest is available. A unit risk factor of 2.7E 10 -6 (µg/m3)-1 and an inhalation cancer potency factor of 2.2E 10+2 (mg/kg BW * day) -1 are available. For more information on asbestos quantity conversion factors, see Appendix C of OEHHA’s The Air Toxics Hot Spots Program Risk Assessment Guidelines; Part II; Technical Support Document for Describing Available Cancer Potency Factors, and Appendix C of OEHHA’s The Air Toxics Hot Spots Program Risk Assessment Guidelines; Part V; Technical Support Document; Guidance Manual for Preparation of Health Risk Assessments.

W Inorganic Lead: Inorganic Lead was identified by the Air Resources Board as a Toxic Air Contaminant in April 1997. Since information on noncancer health effects show no identified threshold, no Reference Exposure Level has been developed. The document, Risk Management Guidelines for New, Modified, and Existing Sources of Lead, March 2001, has been developed by ARB and OEHHA staff for assessing noncancer health impacts from sources of lead. See Appendix F of OEHHA’s The Air Toxics Hot Spots Program Risk Assessment Guidelines; Part V; Technical Support Document; Guidance Manual for Preparation of Health Risk Assessments for an overview of how to evaluate noncancer impacts from exposure to lead using these risk management guidelines.

v Polycyclic Aromatic Hydrocarbons (PAHs): These substances are PAH or PAH-derivatives that have OEHHA-developed Potency Equivalency Factors (PEFs) which were approved by the Scientific Review Panel in April 1994 (see ARB document entitled Benzo [a]pyrene as a Toxic Air Contaminant). PAH inhalation slope factors listed here have been adjusted by the PEFs. See Appendix G of OEHHA’s The Air Toxics Hot Spots Program Risk Assessment Guidelines; Part V; Technical Support Document; Guidance Manual for Preparation of Health Risk Assessments for more information.

H Polychlorinated Biphenyls: (unspeciated mixtures) Lowest Risk: For use in cases where congeners with more than four chlorines comprise less than one-half percent of total polychlorinated biphenyls. High Risk: For use in cases where congeners with more than four chlorines do not comprise less than one-half percent of total polychlorinated biphenyls. The Low Risk: This number would not ordinarly be used in the Hot Spots program.

• Polychlorinated Dibenzo-p-dioxins and Polychlorinated Dibenzofurans (also referred to as chlorinated dioxins and dibenzofurans): The OEHHA has adopted the World Health Organization 1997 (WHO-97) Toxicity Equivalency Factor ) scheme for evaluating the cancer and noncancer risk due to exposure to samples containing speciated mixtures of polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF). See Appendix A of OEHHA’s Technical Support Document For Describing Available Cancer Potency Factors for more information about the scheme. See Appendix E of OEHHA’s The Air Toxics Hot Spots Program Risk Assessment Guidelines; Part V; Technical Support Document; Guidance Manual for Preparation of Health Risk Assessments for the methodology for calculatin g 2,3,7,8-equivalents for PCDD and PCDFs.

n Particulate Emissions from Diesel-Fueled Engines: The inhalation cancer potency factor and chronic REL were derived from whole diesel exhaust and should be used only for impacts from the inhalation pathway. The inhalation impacts from speciated emissions from diesel-fueled engines are already accounted for in the inhalation cancer potency factor and REL. However, at the discretion of the risk assessor, speciated emissions from diesel-fueled engines may be used to estimate acute noncancer health impacts or the contribution to cancer risk or chronic noncancer health impacts for the non-inhalation exposure pathway. See Appendix D of OEHHA’s The Air Toxics Hot Spots Program Risk Assessment Guidelines; Part V; Technical Support Document; Guidance Manual for Preparation of Health Risk Assessments for more information.

Table last updated: August, 2003

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APPENDIX L - TAB LE 2 OEHHA/ARB ACUTE REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-17

Target Organs

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute REL (µg/m3)

Date u

Value Reviewed

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ACROLEIN 107-02-8 1.9E-01 4/99 X X

ACRYLIC ACID 79-10-7 6.0E+03 4/99 X X

AMMONIA 7664-41-7 3.2E+03 4/99 X X

ARSENIC AND COMPOUNDS (INORGANIC) TAC 7440-38-2

1016 [1015]

1.9E-01AveP 4/99 X X

ARSINE 7784-42-1 1.6E+02 4/99 X

BENZENETAC 71-43-2 1.3E+03 AveP 4/99 X X X X

BENZYL CHLORIDE 100-44-7 2.4E+02 4/99 X X

CARBON DISULFIDE 75-15-0 6.2E+03 AveP 4/99 X X X

CARBON MONOXIDE 630-08-0 2.3E+04 4/99 X

CARBON TETRACHLORIDETAC (Tetrachloromethane) 56-23-5 1.9E+03 AveP 4/99 X X X X

CHLORINE 7782-50-5 2.1E+02 4/99 X X

CHLOROFORM TAC 67-66-3 1.5E+02 AveP 4/99 X X X

CHLOROPICRIN 76-06-2 2.9E+01 4/99 X X

COPPER AND COMPOUNDS 7440-50-8 [1067] 1.0E+02 4/99 X

Cyanide Compounds (inorganic) 57-12-5 1073 3.4E+02 4/99 ü

HYDROGEN CYANIDE (Hydrocyanic acid) 74-90-8 3.4E+02 4/99 X

1,4-DIOXANE; (1,4-Diethylene dioxide) 123-91-1 3.0E+03 4/99 X X

EPICHLOROHYDRIN (1-Chloro-2,3-epoxypropane) 106-89-8 1.3E+03 4/99 X X

Fluorides and Compounds 1101 2.4E+02 4/99 ü ü

HYDROGEN FLUORIDE (Hydrofluoric acid) 7664-39-3 2.4E+02 4/99 X X

FORMALDEHYDETAC 50-00-0 9.4E+01 4/99 X X X

GLYCOL ETHERS 1115

ETHYLENE GLYCOL BUTYL ETHER – EGBE 111-76-2 1.4E+04 4/99 X X

ETHYLENE GLYCOL ETHYL ETHER – EGEE 110-80-5 3.7E+02 AveP 4/99 [1/92] X X

ETHYLENE GLYCOL ETHYL ETHER ACETATE - EGEEA 111-15-9 1.4E+02 AveP 4/99 X X X

ETHYLENE GLYCOL METHYL ETHER – EGME 109-86-4 9.3E+01 AveP 4/99 X X

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APPENDIX L - TAB LE 2 OEHHA/ARB ACUTE REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-18

Target Organs

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute REL (µg/m3)

Date u

Value Reviewed

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HYDROCHLORIC ACID (Hydrogen chloride) 7647-01-0 2.1E+03 4/99 X X

HYDROGEN CYANIDE (Hydrocyanic acid) ... (see Cyanide Compounds)

HYDROGEN FLUORIDE (Hydrofluoric acid) ... (see Fluorides & Compounds)

HYDROGEN SELENIDE ... (see Selenium & Compounds)

HYDROGEN SULFIDE 7783-06-4 4.2E+01 4/99 [7/90] X

ISOPROPYL ALCOHOL (Isopropanol) 67-63-0 3.2E+03 4/99 X X

MERCURY AND COMPOUNDS (INORGANIC) 7439-97-6 [1133] 1.8E+00 4/99 X X

Mercuric chloride 7487-94-7 1.8E+00 4/99 ü ü

METHANOL 67-56-1 2.8E+04 4/99 X

METHYL BROMIDE (Bromomethane) 74-83-9 3.9E+03 4/99 X X X X

METHYL CHLOROFORM (1,1,1-Trichloroethane) 71-55-6 6.8E+04 4/99 X

METHYL ETHYL KETONE (2-Butanone) 78-93-3 1.3E+04 4/99 X X

METHYLENE CHLORIDETAC (Dichloromethane) 75-09-2 1.4E+04 4/99 X

NICKEL AND COMPOUNDSTAC 7440-02-0 [1145] 6.0E+00 4/99 X X

Nickel acetate, 373-02-4 6.0E+00 4/99 ü ü

Nickel carbonate 3333-39-3 6.0E+00 4/99 ü ü

Nickel carbonyl 13463-39-3 6.0E+00 4/99 ü ü

Nickel hydroxide 12054-48-7 6.0E+00 4/99 ü ü

Nickelocene 1271-28-9 6.0E+00 4/99 ü ü

NICKEL OXIDE 1313-99-1 6.0E+00 4/99 X X

Nickel refinery dust from the pyrometallurgical process 1146 6.0E+00 4/99 ü ü

Nickel subsulfide 12035-72-2 6.0E+00 4/99 ü ü

NITRIC ACID 7697-37-2 8.6E+01 4/99 X

NITROGEN DIOXIDE 10102-44-0 4.7E+02 4/99 [1/92] X

OZONE 10028-15-6 1.8E+02 4/99 [1/92] X X

PERCHLOROETHYLENETAC (Tetrachloroethylene) 127-18-4 2.0E+04 4/99 X X X

PHENOL 108-95-2 5.8E+03 4/99 X X

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APPENDIX L - TAB LE 2 OEHHA/ARB ACUTE REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-19

Target Organs

Substance b

Chemicalt

Abstract Service

Number (CAS)

Acute REL (µg/m3)

Date u

Value Reviewed

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PHOSGENE 75-44-5 4.0E+00 4/99 X

PROPYLENE OXIDE 75-56-9 3.1E+03 4/99 X X X X

Selenium and Compounds 7782-49-2 [1170]

HYDROGEN SELENIDE 7783-07-5 5.0E+00 4/99 X X

SODIUM HYDROXIDE 1310-73-2 8.0E+00 4/99 X X X

STYRENE 100-42-5 2.1E+04 4/99 X X

SULFATES 9960 1.2E+02 4/99 X

SULFUR DIOXIDE 7446-09-5 6.6E+02 4/99 [1/92] X

SULFURIC ACID AND OLEUM 7664-93-9 1.2E+02 4/99 X

SULFURIC ACID 7664-93-9 1.2E+02 4/99 ü

SULFUR TRIOXIDE 7446-71-9 1.2E+02 4/99 ü

OLEUM 8014-95-7 1.2E+02 4/99 ü

TOLUENE 108-88-3 3.7E+04 4/99 X X X X X

TRIETHYLAMINE 121-44-8 2.8E+03 4/99 X X

Vanadium Compounds N/A

Vanadium (fume or dust) 7440-62-2 3.0E+01 4/99 ü ü

VANADIUM PENTOXIDE 1314-62-1 3.0E+01 4/99 X X

VINYL CHLORIDETAC (Chloroethylene) 75-01-4 1.8E+05 4/99 X X X

XYLENES (mixed isomers) 1330-20-7 1210 2.2E+04 4/99 X X

m-Xylene 108-38-3 2.2E+04 4/99 X X o-Xylene 95-47-6 2.2E+04 4/99 X X p-Xylene 106-42-3 2.2E+04 4/99 X X

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APPENDIX L - TAB LE 2 OEHHA/ARB ACUTE REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-20

Purpose: The purpose of this reference table is to provide a quick list of all health values that have been approved by the Office of Environmental Health Hazard Assessment (OEHHA) and the Air Resources Board (ARB) for use in facility health risk assessments conducted for the AB 2588 Air Toxics Hot Spots Program. The OEHHA has developed and adopted new risk assessment guidelines that update and replace the California Air Pollution Control Officers Association’s (CAPCOA) Air Toxics “Hot Spots” Program Revised 1992 Risk Assessment Guidelines, October 1993 . The OEHHA has adopted five technical support documents for these guidelines. This table lists the OEHHA adopted noncancer acute Reference Exposure Levels (RELs). In addition, it lists the substances in Appendix A-I (Substances For Which Emissions Must Be Quantified) and Appendix F (Criteria For Inputs For Risk Assessment Using Screening Air Dispersion Modeling) of the ARB’s Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines (EICG) . Users of this table are advised to monitor the OEHHA website (www.oehha.ca.gov) for any updates to the health values.

b Substances written in italics and with a ü do not have explicit OEHHA approved health values, but are included in this table to clarify applicability of OEHHA adopted health effects values to individual or grouped substances listed in the Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines, Appendix A-I list of “Substances For Which Emissions Must Be Quantified”.

t Chemical Abstract Service Number (CAS): For chemical groupings and mixtures where a CAS number is not applicable, the 4-digit code used in the Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines (EICG) Report is listed. The 4-digit codes enclosed in brackets [ ] are codes that have been phased out, but may still appear on previously reported Hot Spots emissions. For information on the origin and use of the 4-digit code, see the EICG report.

u Date Value Reviewed [Added]: This column lists the date that the health value was last reviewed by OEHHA and the Scientific Review Panel, and/or approved for use in the AB 2588 Air Toxics “Hot Spots” Program. If the health value is unchanged since it was first approved for use in the “Hot Spots” Program, then the date that the value was first approved for use by CAPCOA is listed within the brackets [ ].

• April 1999 is listed for the noncancer acute RELs which have been adopted by the OEHHA as part of the AB 2588 “Hot Spot” Risk Assessment Guidelines.

TAC Toxic Air Contaminant: The Air Resources Board has identified this substance as a Toxic Air Contaminant.

AveP The averaging period of noncancer acute RELs is generally a one-hour exposure. However, some are based on several hour exposure for reproductive/developmental endpoints (see sect ion 1.6 of OEHHA’s technical support document for The Determination of Acute Reference Exposure Levels for Airborne Toxicants, March 1999). Typically the RELs for the following substances are compared to modeled emission concentrations of the same duration rather than maximum one-hour concentrations (e.g., a 4-hour REL should be compared to the maximum 4-hour average concentration from the air dispersion model).

4-Hour: Arsenic and Inorganic Arsenic Compounds

6-Hour: Benzene, Carbon disulfide, Ethylene glycol ethyl ether, Ethylene glycol ethyl ether acetate, Ethylene glycol methyl ether

7-Hour: Carbon tetrachloride, Chloroform

Table last updated: August 2003

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APPENDIX L - TABLE 3 OEHHA/ARB CHRONIC INHALATION AND ORAL REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-21

Target Organs

Substance b

Chemicalt

Abstract Service

Number (CAS)

Chronic Inhalation

REL (µg/m3)

Chronic Oral REL

Date u

Value Reviewed [Added]

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ACETALDEHYDE 75-07-0 9.0E+00 5/93 X ACROLEIN 107-02-8 6.0E-02 1/01 X X

ACRYLONITRILE 107-13-1 5.0E+00 12/01 X AMMONIA 7664-41-7 2.0E+02 2/00 X

3.0E-02 1/01 X X X ARSENIC AND COMPOUNDS (INORGANIC) TAC 7440-38-2

1016 [1015] 3.0E-04 10/00 X X

BENZENETAC 71-43-2 6.0E+01 2/00 X X X

7.0E-03 12/01 X X BERYLLIUM AND COMPOUNDS 7440-41-7 [1021] 2.0E-03 12/01 X

1,3-BUTADIENETAC 106-99-0 2.0E+01 1/01 X

2.0E-02 1/01 X X CADMIUM AND COMPOUNDST7AC 7440-43-9 [1045] 5.0E-04 10/00 X

CARBON DISULFIDE 75-15-0 8.0E+02 11/01 X X

CARBON TETRACHLORIDETAC (Tetrachloromethane) 56-23-5 4.0E+01 1/01 X X X CHLORINE 7782-50-5 2.0E-01 2/00 X CHLORINE DIOXIDE 10049-04-4 6.0E-01 1/01 X CHLOROBENZENE 108-90-7 1.0E+03 1/01 X X X CHLOROFORM TAC 67-66-3 3.0E+02 4/00 X X X CHLOROPICRIN 76-06-2 4.0E-01 12/01 X

2.0E-01 1/01 X CHROMIUM 6+TAC 18540-29-9 2.0E-02 10/00 X

2.0E-01 1/01 ü

Barium chromate 10294-40-3 2.0E-02 10/00 ü

2.0E-01 1/01 ü Calcium chromate 13765-19-0

2.0E-02 10/00 ü 2.0E-01 1/01 ü

Lead chromate 7758-97-6 2.0E-02 10/00 ü

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APPENDIX L - TABLE 3 OEHHA/ARB CHRONIC INHALATION AND ORAL REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-22

Target Organs

Substance b

Chemicalt

Abstract Service

Number (CAS)

Chronic Inhalation

REL (µg/m3)

Chronic Oral REL

Date u

Value Reviewed [Added]

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2.0E-01 1/01 ü Sodium dichromate 10588-01-9 2.0E-02 10/00 ü

2.0E-01 1/01 ü Strontium chromate 7789-06-2

2.0E-02 10/00 ü 2.0E-03 1/01 X CHROMIUM TRIOXIDE (as chromic acid mist) 1333-82-0

2.0E-02 10/00 ü CRESOLS (mixtures of) 1319-77-3 6.0E+02 1/01 X m-CRESOL 108-39-4 6.0E+02 1/01 X o-CRESOL 95-48-7 6.0E+02 1/01 X p-CRESOL 106-44-5 6.0E+02 1/01 X Cyanide Compounds (inorganic) 57-12-5

1073 9.0E+00 4/00 ü ü ü HYDROGEN CYANIDE (Hydrocyanic acid) 74-90-8 9.0E+00 4/00 X X X p-DICHLOROBENZENE 106-46-7 8.0E+02 1/01 X X X X 1,1,-DICHLOROETHYLENE … (see Vinylidene Chloride) DIESEL EXHAUST … (see Particulate Emissions from Diesel-Fueled Engines)

DIETHANOLAMINE 111-42-2 3.0E+00 12/01 X X N,N-DIMETHYL FORMAMIDE 68-12-2 8.0E+01 1/01 X X 1,4-DIOXANE; (1,4-Diethylene dioxide) 123-91-1 3.0E+03 4/00 X X X EPICHLOROHYDRIN (1-Chloro-2,3-epoxypropane) 106-89-8 3.0E+00 1/01 X X 1,2-EPOXYBUTANE 106-88-7 2.0E+01 1/01 X X ETHYL BENZENE 100-41-4 2.0E+03 2/00 X X X X ETHYL CHLORIDE (Chlorethane) 75-00-3 3.0E+04 4/00 X X ETHYLENE DIBROMIDETAC (1,2-Dibromoethane) 106-93-4 8.0E-01 12/01 X ETHYLENE DICHLORIDETAC (1,2-Dichloroethane) 107-06-2 4.0E+02 1/01 X ETHYLENE GLYCOL 107-21-1 4.0E+02 4/00 X X X ETHYLENE OXIDETAC (1,2-Epoxyethane) 75-21-8 3.0E+01 1/01 X

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APPENDIX L - TABLE 3 OEHHA/ARB CHRONIC INHALATION AND ORAL REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-23

Target Organs

Substance b

Chemicalt

Abstract Service

Number (CAS)

Chronic Inhalation

REL (µg/m3)

Chronic Oral REL

Date u

Value Reviewed [Added]

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Fluorides 1101 1.3E+1 4.0E-2 8/03 X ü* ü ü* HYDROGEN FLUORIDE (Hydrofluoric acid) 7664-39-3 1.4E+1 4.0E-2 8/03 X X* X X* FORMALDEHYDETAC 50-00-0 3.0E+00 2/00 X X

GLUTARALDEHYDE 111-30-8 8.0E-02 1/01 X GLYCOL ETHERS 1115 ETHYLENE GLYCOL ETHYL ETHER – EGEE 110-80-5 7.0E+01 2/00 X X

ETHYLENE GLYCOL ETHYL ETHER ACETATE - EGEEA 111-15-9 3.0E+02 2/00 X

ETHYLENE GLYCOL METHYL ETHER – EGME 109-86-4 6.0E+01 2/00 X

ETHYLENE GLYCOL METHYL ETHER ACETATE – EGMEA 110-49-6 9.0E+01 2/00 X

n-HEXANE 110-54-3 7.0E+03 4/00 X

HYDRAZINE 302-01-2 2.0E-01 1/01 X X HYDROCHLORIC ACID (Hydrogen chloride) 7647-01-0 9.0E+00 2/00 X HYDROGEN CYANIDE (Hydrocyanic acid) (see Cyanide Compounds) HYDROGEN FLUORIDE (Hydrofluoric acid) (see Fluorides & Compounds)

HYDROGEN SULFIDE 7783-06-4 1.0E+01 4/00 X

ISOPHORONE 78-59-1 2.0E+03 12/01 X X

ISOPROPYL ALCOHOL (Isopropanol) 67-63-0 7.0E+03 2/00 X X

MALEIC ANHYDRIDE 108-31-6 7.0E-01 12/01 X

MANGANESE AND COMPOUNDS 7439-96-5 [1132] 2.0E-01 4/00 X

9.0E-02 2/00 X MERCURY AND COMPOUNDS (INORGANIC) 7439-97-6 [1133] 3.0E-04 10/00

[1/92] X X

9.0E-02 2/00 ü

Mercuric chloride 7487-94-7

3.0E-04 10/00 [1/92] ü ü

MERCURY AND COMPOUNDS (ORGANIC) N/A

METHANOL 67-56-1 4.0E+03 4/00 X

METHYL BROMIDE (Bromomethane) 74-83-9 5.0E+00 2/00 X X X METHYL tertiary-BUTYL ETHER 1634-04-4 8.0E+03 2/00 X X X

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APPENDIX L - TABLE 3 OEHHA/ARB CHRONIC INHALATION AND ORAL REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-24

Target Organs

Substance b

Chemicalt

Abstract Service

Number (CAS)

Chronic Inhalation

REL (µg/m3)

Chronic Oral REL

Date u

Value Reviewed [Added]

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METHYL CHLOROFORM (1,1,1-Trichloroethane) 71-55-6 1.0E+03 2/00 X METHYL ISOCYANATE 624-83-9 1.0E+00 12/01 X X METHYLENE CHLORIDETAC (Dichloromethane) 75-09-2 4.0E+02 2/00 X X

4,4'-METHYLENE DIANILINE (AND ITS DICHLORIDE) 101-77-9 2.0E+01 12/01 X X

METHYLENE DIPHENYL ISOCYANATE 101-68-8 7.0E-01 1/01 X NAPHTHALENE 91-20-3 9.0E+00 4/00 X

5.0E-02 2/00 X X NICKEL AND COMPOUNDSTAC 7440-02-0

[1145] 5.0E-02 10/00 X 5.0E-02 2/00 ü ü

Nickel acetate 373-02-4 5.0E-02 10/00 ü

5.0E-02 2/00 ü ü Nickel carbonate 3333-39-3

5.0E-02 10/00 ü 5.0E-02 2/00 ü ü

Nickel carbonyl 13463-39-3 5.0E-02 10/00 ü

5.0E-02 2/00 ü ü Nickel hydroxide 12054-48-7

5.0E-02 10/00 ü 5.0E-02 2/00 ü ü

Nickelocene 1271-28-9 5.0E-02 10/00 ü

1.0E-01 2/00 X X NICKEL OXIDE 1313-99-1 5.0E-02 10/00 X

5.0E-02 2/00 ü ü Nickel refinery dust from pyrometallurgical process 1146

5.0E-02 10/00 ü 5.0E-02 2/00 ü ü

Nickel subsulfide 12035-72-2 5.0E-02 10/00 ü

PCB (POLYCHLORINATED BIPHENYLS (speciated)∇ 35298-13-3 4.0E-01 8/03 X X X X X X

3,3’,4,4’-TETRACHLOROBIPHENYL (77) 1.0E –04 8/03 X X X X X X

70362-50-4 4.0E-01 8/03 X X X X X X 3,4,4’,5-TETRACHLOROBIPHENYL (81)

1.0E –04 8/03 X X X X X X

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APPENDIX L - TABLE 3 OEHHA/ARB CHRONIC INHALATION AND ORAL REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-25

Target Organs

Substance b

Chemicalt

Abstract Service

Number (CAS)

Chronic Inhalation

REL (µg/m3)

Chronic Oral REL

Date u

Value Reviewed [Added]

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32598-14-4 4.0E-01 8/03 X X X X X X 2,3,3’,4,4’- PENTACHLOROBIPHENYL (105)

1.0E –04 8/03 X X X X X X 74472-37-0 8.0E-02 8/03 X X X X X X

2,3,4,4’5- PENTACHLOROBIPHENYL (114) 2.0E –05 8/03 X X X X X X

31508-00-6 4.0E-01 8/03 X X X X X X 2,3’4,4’,5- PENTACHLOROBIPHENYL (118)

1.0E –04 8/03 X X X X X X 65510-44-3 4.0E-01 8/03 X X X X X X

2’,3,4,4’,5- PENTACHLOROBIPHENYL (123) 1.0E –04 8/03 X X X X X X

57465-28-8 4.0E-04 8/03 X X X X X X 3,3’,4,4’,5- PENTACHLOROBIPHENYL (126)

1.0E –07 8/03 X X X X X X 38380-08-4 8.0E-02 8/03 X X X X X X

2,3,3’,4,4’,5-HEXACHLOROBIPHENYL (156) 2.0E –05 8/03 X X X X X X

69782-90-7 8.0E-02 8/03 X X X X X X 2,3,3’,4,4’,5’-HEXACHLOROBIPHENYL (157)

2.0E –05 8/03 X X X X X X 52663-72-6 4.0E-00 8/03 X X X X X X

2,3’,4,4’,5,5’-HEXACHLOROBIPHENYL (167) 1.0E –03 8/03 X X X X X X

32774-16-6 4.0E-03 8/03 X X X X X X 3,3’,4,4’5,5’- HEXACHLOROBIPHENYL (169)

1.0E –06 8/03 X X X X X X 39635-31-9 4.0E-01 8/03 X X X X X X

2,3,3’4,4’,5,5’- HEPTACHLOROBIPHENYL (189) 1.0 E-04 8/03 X X X X X X

PARTICULATE EMISSIONS FROM DIESEL-FUELED ENGINESTAC n 9901 5.0E+00TAC 8/98 X

PERCHLOROETHYLENETAC (Tetrachloroethylene) 127-18-4 3.5E+01TAC 10/91 X X

PHENOL 108-95-2 2.0E+02 4/00 X X X X PHOSPHINE 7803-51-2 8.0E-1 9/02 X X X PHOSPHORIC ACID 7664-38-2 7.0E+00 2/00 X

PHTHALIC ANHYDRIDE 85-44-9 2.0E+01 1/01 X POLYCHLORINATED DIBENZO-P-DIOXINS (PCDD)

(AS 2,3,7,8-EQUIV)TAC • 1085 1086

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APPENDIX L - TABLE 3 OEHHA/ARB CHRONIC INHALATION AND ORAL REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-26

Target Organs

Substance b

Chemicalt

Abstract Service

Number (CAS)

Chronic Inhalation

REL (µg/m3)

Chronic Oral REL

Date u

Value Reviewed [Added]

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4.0E-05 2/00 X X X X X X 2,3,7,8-TETRACHLORODIBENZO-P-DIOXINTAC 1746-01-6 1.0E-08 10/00 X X X X X X

4.0E-05 2/00 X X X X X X 1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 40321-76-4 1.0E-08 10/00 X X X X X X

4.0E-04 2/00 X X X X X X 1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 39227-28-6 1.0E-07 10/00 X X X X X X

4.0E-04 2/00 X X X X X X 1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 57653-85-7 1.0E-07 10/00 X X X X X X

4.0E-04 2/00 X X X X X X 1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 19408-74-3 1.0E-07 10/00 X X X X X X

4.0E-03 2/00 X X X X X X 1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 35822-46-9 1.0E-06 10/00 X X X X X X

4.0E-01 2/00 X X X X X X 1,2,3,4,6,7,8,9-OCTACHLORODIBENZO-P-DIOXIN 3268-87-9 1.0E-04 10/00 X X X X X X POLYCHLORINATED DIBENZOFURANS (PCDF)

(AS 2,3,7,8-EQUIV) TAC • 1080

4.0E-04 2/00 X X X X X X 2,3,7,8-TETRACHLORODIBENZOFURAN 5120-73-19

1.0E-07 10/00 X X X X X X 8.0E-04 2/00 X X X X X X 1,2,3,7,8-PENTACHLORODIBENZOFURAN 57117-41-6

2.0E-07 10/00 X X X X X X 8.0E-05 2/00 X X X X X X 2,3,4,7,8-PENTACHLORODIBENZOFURN 57117-31-4

2.0E-08 10/00 X X X X X X 4.0E-04 2/00 X X X X X X 1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 70648-26-9

1.0E-07 10/00 X X X X X X 4.0E-04 2/00 X X X X X X 1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 57117-44-9

1.0E-07 10/00 X X X X X X 4.0E-04 2/00 X X X X X X 1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 72918-21-9

1.0E-07 10/00 X X X X X X 4.0E-04 2/00 X X X X X X 2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 60851-34-5

1.0E-07 10/00 X X X X X X

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APPENDIX L - TABLE 3 OEHHA/ARB CHRONIC INHALATION AND ORAL REFERENCE EXPOSURE LEVELS AND TARGET ORGANS b

Appendix L-27

Target Organs

Substance b

Chemicalt

Abstract Service

Number (CAS)

Chronic Inhalation

REL (µg/m3)

Chronic Oral REL

Date u

Value Reviewed [Added]

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4.0E-03 2/00 X X X X X X 1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 67562-39-4 1.0E-06 10/00 X X X X X X

4.0E-03 2/00 X X X X X X 1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 55673-89-7 1.0E-06 10/00 X X X X X X

4.0E-01 2/00 X X X X X X 1,2,3,4,6,7,8,9-OCTACHLORODIBENZOFURAN 39001-02-0 1.0E-04 10/00 X X X X X X

PROPYLENE (PROPENE) 115-07-1 3.0E+03 4/00 X

PROPYLENE GLYCOL MONOMETHYL ETHER 107-98-2 7.0E+03 2/00 X

PROPYLENE OXIDE 75-56-9 3.0E+01 2/00 X

SELENIUM AND COMPOUNDS (other than hydrogen selenide) 7782-49-2 [1170] 2.0E+01 12/01 X X X

STYRENE 100-42-5 9.0E+02 4/00 X

SULFURIC ACID 7664-93-9 1.0E+00 12/01 X

Sulfuric Acid and Oleum 7664-93-9 1.0E+00 12/01 ü

Sulfuric Trioxide 7446-71-9 1.0E+00 12/01 ü

Oleum 8014-95-7 1.0E+00 12/01 ü

TOLUENE 108-88-3 3.0E+02 4/00 X X X

Toluene diisocyanates 26471-62-5 1204

7.0E-02 1/01 ü

TOLUENE-2,4-DIISOCYANATE 584-84-9 7.0E-02 1/01 X TOLUENE-2,6-DIISOCYANATE 91-08-7 7.0E-02 1/01 X

TRICHLOROETHYLENETAC 79-01-6 6.0E+02 4/00 X X

TRIETHYLAMINE 121-44-8 2.0E+02 9/02 X X X VINYL ACETATE 108-05-4 2.0E+02 12/01 X

VINYLIDENE CHLORIDE (1,1,-Dichloroethylene) 75-35-4 7.0E+01 1/01 X

XYLENES (mixed isomers) 1330-20-7 1210 7.0E+02 4/00 X X

m-XYLENE 108-38-3 7.0E+0 2 4/00 X X o-XYLENE 95-47-6 7.0E+02 4/00 X X p-XYLENE 106-42-3 7.0E+02 4/00 X X

B-25

Appendix L-1

Purpose: The purpose of this reference table is to provide a quick list of all health values that have been approved by the Office of Environmental Health Hazard Assessment (OEHHA) and the Air Resources Board (ARB) for use in facility health risk assessments conducted for the AB 2588 Air Toxics Hot Spots Program. The OEHHA has developed and adopted new risk assessment guidelines that update and replace the California Air Pollution Control Officers Association’s (CAPCOA) Air Toxics “Hot Spots” Program Revised 1992 Risk Assessment Guidelines, October 1993 . The OEHHA has adopted five technical support documents for these guidelines. This table lists the OEHHA adopted inhalation and oral noncancer chronic RELs. In addition, it lists the substances in Appendix A-I (Substances For Which Emissions Must Be Quantified) and Appendix F (Criteria For Inputs For Risk Assessment Using Screening Air Dispersion Modeling) of the ARB’s Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines (EICG). OEHHA is still in the process of adopting new noncancer chronic RELs. Therefore, new health values will periodically be added to, or deleted from, this t able. Users of this table are advised to monitor the OEHHA website (www.oehha.ca.gov) for any updates to the health values.

b Substances written in italics and with a ü do not have explicit OEHHA approved health values, but are included in this table to clarify applicability of OEHHA adopted heath effects values to individual or grouped substances listed in the Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines, Appendix A-I list of “Substances For Which Emissions Must Be Quantified”.

t Chemical Abstract Service Number (CAS): For chemical groupings and mixtures where a CAS number is not applicable, the 4-digit code used in the Air Toxics “Hot Spots” Emission Inventory Criteria and Guidelines (EICG) Report is listed. The 4-digit codes enclosed in brackets [ ] are codes that have been phased out, but may still appear on previously reported Hot Spots emissions. For information on the origin and use of the 4-digit code, see the EICG report.

u Date Value Reviewed [Added]: This column lists the date that the health value was last reviewed by OEHHA and the Scientific Review Panel, and/or approved for use in the AB 2588 Air Toxics “Hot Spots” Program. If the health value is unchanged since it was first approved for use in the “Hot Spots” Program, then the date that the value was first approved for use by CAPCOA is listed within the brackets [ ].

• February 2000, April 2000, January 2001, and December 2001 are listed for the first set of 22, the second set of 16, the third set of 22, and the fourth set of 12 noncancer chronic RELs, respectively. • October 2000 is listed for the oral chronic RELs. The chronic REL for carbon disulfide was adopted in May 2002. Chronic RELS for phosphine and triethylamine were adopted in September 2002.

Chronic RELs for fluorides including hydrogen fluoride were adopted August 2003. • For the substances identified as Toxic Air Contaminants, the Air Resources Board hearing date is listed. The date for acetaldehyde represents the date the value was approved by the Scientific Review

Panel.

TAC Toxic Air Contaminant: The Air Resources Board has identified this substance as a Toxic Air Contaminant. H Polychlorinated Biphenyls:

Chronic Oral: The chronic oral value is U.S. EPA’s 1996 oral Reference Dose for Aroclor-1254. • Polychlorinated Dibenzo-p-dioxins and Polychlorinated Dibenzofurans (also referred to as chlorinated dioxins and dibenzofurans): The OEHHA has adopted the World Health Organization 1997

(WHO-97)Toxicity Equivalency Factor scheme for evaluating the cancer risk due to exposure to samples containing mixtures of polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF) and determining cancer risks for a number of specific PCB congeners. See Appendix A of OEHHA’s Technical Support Document For Describing Available Cancer Potency Factors for more information about the scheme. See Appendix E of OEHHA’s The Air Toxics Hot Spots Program Risk Assessment Guidelines; Part V; Technical Support Document; Guidance Manual for Preparation of Health Risk Assessments for the methodology for calculating 2,3,7,8-equivalents for PCDD, PCDFs and a number of specific PCB congeners.

n Particulate Emissions from Diesel-Fueled Engines: The unit risk factor and chronic REL were derived from whole diesel exhaust and should be used only for impacts from the inhalation pathway. The inhalation impacts from speciated emissions from diesel-fueled engines are already accounted for in the unit risk factor and REL. However, at the discretion of the risk assessor, speciated emissions from diesel-fueled engines may be used to estimate acute noncancer health impacts or the contribution to cancer risk or chronic noncancer health impacts for the non-inhalation exposure pathway. See Appendix D of OEHHA’s The Air Toxics Hot Spots Program Risk Assessment Guidelines; Part V; Technical Support Document; Guidance Manual for Preparation of Health Risk Assessments for more information.

Table last updated: August 2003

B-26

APPENDIX C

HARP OUTPUT: PMI REPORT

C-1

These results were used to calculate CHRONIC IMPACTS (Cancer, Chronic HI) FILE: C:\RMC_Oct_HARP\300_meter_outputs\REP20_PMI_70yr.txt EXCEPTION REPORT (there have been no changes or exceptions) RECEPTORS WITH HIGHEST CANCER RISK REC TYPE CANCER CHRONIC ACUTE UTME UTMN ZONE 1003 GRID 2.28E-05 6.11E+00 2.21E+00 575937 4098016 10 1004 GRID 1.42E-05 3.42E+00 1.05E+00 576137 4098016 10 1056 GRID 1.33E-05 6.11E-01 6.73E-01 576337 4097816 10 2140 BOUNDARY 1.31E-05 6.78E-01 8.09E-01 576360 4097850 10 2139 BOUNDARY 1.14E-05 3.57E-01 7.14E-01 576360 4097650 10 1107 GRID 1.05E-05 3.41E-01 7.31E-01 576337 4097616 10 1108 GRID 9.62E-06 2.82E-01 5.82E-01 576537 4097616 10 1057 GRID 9.29E-06 4.89E-01 5.16E-01 576537 4097816 10 951 GRID 9.09E-06 3.97E+00 2.15E+00 575737 4098216 10 1005 GRID 8.84E-06 1.11E+00 7.67E-01 576337 4098016 10 1109 GRID 7.65E-06 2.60E-01 4.60E-01 576737 4097616 10 950 GRID 7.50E-06 7.98E-01 1.55E+00 575537 4098216 10 2141 BOUNDARY 7.15E-06 1.06E+00 7.12E-01 576360 4098050 10 952 GRID 6.84E-06 7.73E+00 1.38E+00 575937 4098216 10 1006 GRID 6.36E-06 6.51E-01 5.84E-01 576537 4098016 10 1110 GRID 5.81E-06 2.46E-01 3.70E-01 576937 4097616 10 900 GRID 5.78E-06 3.22E+00 1.09E+00 575737 4098416 10 1161 GRID 5.53E-06 1.65E-01 3.86E-01 576937 4097416 10 1160 GRID 5.51E-06 1.75E-01 4.96E-01 576737 4097416 10 1058 GRID 4.98E-06 3.81E-01 3.51E-01 576737 4097816 10 1162 GRID 4.95E-06 1.66E-01 3.44E-01 577137 4097416 10 953 GRID 4.89E-06 4.18E+00 9.10E-01 576137 4098216 10 899 GRID 4.51E-06 4.55E-01 1.02E+00 575537 4098416 10 1007 GRID 4.43E-06 4.35E-01 5.33E-01 576737 4098016 10 2174 CENSUS 4.03E-06 6.96E+00 9.24E-01 575998 4098406 10 954 GRID 4.03E-06 1.18E+00 6.30E-01 576337 4098216 10 1212 GRID 3.99E-06 1.29E-01 3.80E-01 576937 4097216 10 1159 GRID 3.95E-06 2.03E-01 3.73E-01 576537 4097416 10 849 GRID 3.90E-06 6.23E-01 7.33E-01 575737 4098616 10 901 GRID 3.85E-06 6.86E+00 9.97E-01 575937 4098416 10 2147 BOUNDARY 3.80E-06 6.91E-01 7.35E-01 575760 4098614 10 1213 GRID 3.79E-06 1.20E-01 3.64E-01 577137 4097216 10 902 GRID 3.73E-06 3.53E+00 7.50E-01 576137 4098416 10 2142 BOUNDARY 3.56E-06 1.04E+00 5.89E-01 576360 4098250 10 955 GRID 3.55E-06 6.06E-01 5.06E-01 576537 4098216 10 949 GRID 3.52E-06 3.13E-01 1.09E+00 575337 4098216 10 850 GRID 3.51E-06 9.27E-01 6.66E-01 575937 4098616 10 2148 BOUNDARY 3.51E-06 3.40E-01 6.86E-01 575560 4098614 10 848 GRID 3.47E-06 3.16E-01 6.87E-01 575537 4098616 10 1211 GRID 3.36E-06 1.45E-01 3.98E-01 576737 4097216 10 2146 BOUNDARY 3.35E-06 9.41E-01 6.46E-01 575960 4098614 10 1002 GRID 3.13E-06 3.28E+00 7.88E-01 575737 4098016 10 956 GRID 3.07E-06 3.55E-01 4.02E-01 576737 4098216 10 1264 GRID 2.97E-06 1.03E-01 3.44E-01 577137 4097016 10 847 GRID 2.95E-06 1.97E-01 6.44E-01 575337 4098616 10 2150 BOUNDARY 2.94E-06 2.04E-01 6.70E-01 575355 4098614 10 2151 BOUNDARY 2.85E-06 1.84E-01 7.06E-01 575213 4098472 10

C-2

2149 BOUNDARY 2.84E-06 2.06E-01 6.78E-01 575360 4098614 10 898 GRID 2.80E-06 2.40E-01 7.07E-01 575337 4098416 10 798 GRID 2.80E-06 2.82E-01 5.55E-01 575737 4098816 10 799 GRID 2.78E-06 3.50E-01 4.86E-01 575937 4098816 10 903 GRID 2.77E-06 7.81E-01 5.94E-01 576337 4098416 10 2145 BOUNDARY 2.74E-06 6.68E-01 5.46E-01 576160 4098614 10 851 GRID 2.72E-06 7.19E-01 5.39E-01 576137 4098616 10 1269 GRID 2.62E-06 9.68E-02 2.86E-01 578137 4097016 10 2143 BOUNDARY 2.60E-06 6.28E-01 5.62E-01 576360 4098450 10 1320 GRID 2.52E-06 7.89E-02 3.04E-01 578137 4096816 10 1218 GRID 2.46E-06 1.08E-01 3.06E-01 578137 4097216 10 1114 GRID 2.44E-06 1.36E-01 3.04E-01 577737 4097616 10 797 GRID 2.41E-06 2.13E-01 5.46E-01 575537 4098816 10 2138 BOUNDARY 2.40E-06 2.48E-01 4.03E-01 576360 4097450 10 852 GRID 2.36E-06 3.82E-01 5.02E-01 576337 4098616 10 2144 BOUNDARY 2.34E-06 3.62E-01 4.94E-01 576360 4098614 10 904 GRID 2.29E-06 3.91E-01 4.73E-01 576537 4098416 10 1321 GRID 2.28E-06 8.02E-02 2.71E-01 578337 4096816 10 1270 GRID 2.24E-06 9.33E-02 3.01E-01 578337 4097016 10 748 GRID 2.23E-06 1.98E-01 4.15E-01 575937 4099016 10 1115 GRID 2.22E-06 1.13E-01 2.72E-01 577937 4097616 10 1372 GRID 2.19E-06 6.58E-02 3.03E-01 578337 4096616 10 1322 GRID 2.17E-06 7.99E-02 2.77E-01 578537 4096816 10 1167 GRID 2.17E-06 1.06E-01 3.02E-01 578137 4097416 10 796 GRID 2.15E-06 1.57E-01 5.35E-01 575337 4098816 10 958 GRID 2.10E-06 1.77E-01 3.50E-01 577137 4098216 10 1371 GRID 2.10E-06 6.45E-02 3.17E-01 578137 4096616 10 747 GRID 2.09E-06 1.69E-01 4.19E-01 575737 4099016 10 1219 GRID 2.09E-06 9.69E-02 2.51E-01 578337 4097216 10 1063 GRID 2.09E-06 1.22E-01 3.28E-01 577737 4097816 10 846 GRID 2.08E-06 1.47E-01 6.10E-01 575137 4098616 10 905 GRID 2.03E-06 2.50E-01 3.80E-01 576737 4098416 10 1271 GRID 2.02E-06 8.76E-02 3.01E-01 578537 4097016 10 1214 GRID 1.98E-06 1.18E-01 2.66E-01 577337 4097216 10 800 GRID 1.97E-06 3.24E-01 4.72E-01 576137 4098816 10 853 GRID 1.93E-06 2.42E-01 4.52E-01 576537 4098616 10 801 GRID 1.89E-06 2.36E-01 4.24E-01 576337 4098816 10 1262 GRID 1.88E-06 1.27E-01 3.56E-01 576737 4097016 10 1315 GRID 1.86E-06 9.24E-02 3.45E-01 577137 4096816 10 1064 GRID 1.86E-06 1.01E-01 2.79E-01 577937 4097816 10 1012 GRID 1.86E-06 1.10E-01 3.21E-01 577737 4098016 10 795 GRID 1.85E-06 1.25E-01 4.98E-01 575137 4098816 10 746 GRID 1.83E-06 1.47E-01 4.34E-01 575537 4099016 10 1116 GRID 1.81E-06 9.45E-02 2.47E-01 578137 4097616 10 959 GRID 1.81E-06 1.40E-01 3.32E-01 577337 4098216 10 1008 GRID 1.80E-06 3.01E-01 3.15E-01 576937 4098016 10 1220 GRID 1.79E-06 8.59E-02 2.80E-01 578537 4097216 10 1169 GRID 1.78E-06 7.83E-02 2.76E-01 578537 4097416 10 749 GRID 1.76E-06 1.94E-01 3.97E-01 576137 4099016 10 1168 GRID 1.75E-06 9.04E-02 2.90E-01 578337 4097416 10 745 GRID 1.72E-06 1.22E-01 4.45E-01 575337 4099016 10 1265 GRID 1.70E-06 9.46E-02 2.80E-01 577337 4097016 10 897 GRID 1.69E-06 1.72E-01 4.33E-01 575137 4098416 10 RECEPTORS WITH HIGHEST CHRONIC HI REC TYPE CANCER CHRONIC ACUTE UTME UTMN ZONE 952 GRID 6.84E-06 7.73E+00 1.38E+00 575937 4098216 10

C-3

2174 CENSUS 4.03E-06 6.96E+00 9.24E-01 575998 4098406 10 901 GRID 3.85E-06 6.86E+00 9.97E-01 575937 4098416 10 1003 GRID 2.28E-05 6.11E+00 2.21E+00 575937 4098016 10 953 GRID 4.89E-06 4.18E+00 9.10E-01 576137 4098216 10 951 GRID 9.09E-06 3.97E+00 2.15E+00 575737 4098216 10 902 GRID 3.73E-06 3.53E+00 7.50E-01 576137 4098416 10 1004 GRID 1.42E-05 3.42E+00 1.05E+00 576137 4098016 10 1002 GRID 3.13E-06 3.28E+00 7.88E-01 575737 4098016 10 900 GRID 5.78E-06 3.22E+00 1.09E+00 575737 4098416 10 954 GRID 4.03E-06 1.18E+00 6.30E-01 576337 4098216 10 1005 GRID 8.84E-06 1.11E+00 7.67E-01 576337 4098016 10 2141 BOUNDARY 7.15E-06 1.06E+00 7.12E-01 576360 4098050 10 2142 BOUNDARY 3.56E-06 1.04E+00 5.89E-01 576360 4098250 10 1338 GRID 3.53E-07 1.04E+00 8.73E-03 571537 4096616 10 1287 GRID 4.52E-07 9.84E-01 1.03E-02 571537 4096816 10 890 GRID 2.69E-07 9.48E-01 4.81E-01 573737 4098416 10 941 GRID 1.38E-07 9.44E-01 4.93E-01 573737 4098216 10 2146 BOUNDARY 3.35E-06 9.41E-01 6.46E-01 575960 4098614 10 1001 GRID 8.65E-07 9.33E-01 5.66E-01 575537 4098016 10 889 GRID 2.43E-07 9.29E-01 5.16E-01 573537 4098416 10 850 GRID 3.51E-06 9.27E-01 6.66E-01 575937 4098616 10 940 GRID 2.41E-07 9.27E-01 5.46E-01 573537 4098216 10 839 GRID 6.97E-07 9.21E-01 4.69E-01 573737 4098616 10 2119 BOUNDARY 6.67E-07 9.21E-01 4.81E-01 573675 4098614 10 891 GRID 2.41E-07 9.03E-01 4.50E-01 573937 4098416 10 2118 BOUNDARY 4.19E-07 9.00E-01 4.63E-01 573875 4098614 10 942 GRID 2.18E-07 9.00E-01 4.51E-01 573937 4098216 10 992 GRID 1.81E-07 8.99E-01 5.20E-01 573737 4098016 10 838 GRID 3.62E-07 8.96E-01 5.01E-01 573537 4098616 10 991 GRID 1.94E-07 8.83E-01 5.57E-01 573537 4098016 10 2120 BOUNDARY 3.17E-07 8.77E-01 4.98E-01 573475 4098614 10 840 GRID 6.93E-07 8.76E-01 4.41E-01 573937 4098616 10 993 GRID 1.71E-07 8.60E-01 4.88E-01 573937 4098016 10 1054 GRID 3.02E-07 8.36E-01 3.97E-01 575937 4097816 10 2117 BOUNDARY 3.18E-07 8.35E-01 4.27E-01 574013 4098544 10 939 GRID 1.94E-07 8.33E-01 5.49E-01 573337 4098216 10 888 GRID 2.19E-07 8.31E-01 5.30E-01 573337 4098416 10 1053 GRID 1.42E-07 8.16E-01 3.30E-01 575737 4097816 10 788 GRID 6.35E-07 8.05E-01 4.84E-01 573737 4098816 10 990 GRID 1.89E-07 7.99E-01 6.23E-01 573337 4098016 10 950 GRID 7.50E-06 7.98E-01 1.55E+00 575537 4098216 10 837 GRID 2.17E-07 7.97E-01 4.89E-01 573337 4098616 10 1055 GRID 1.13E-06 7.86E-01 3.52E-01 576137 4097816 10 787 GRID 1.91E-07 7.86E-01 3.99E-01 573537 4098816 10 903 GRID 2.77E-06 7.81E-01 5.94E-01 576337 4098416 10 789 GRID 6.62E-07 7.80E-01 4.38E-01 573937 4098816 10 1052 GRID 1.33E-07 7.68E-01 2.63E-01 575537 4097816 10 1339 GRID 2.41E-07 7.57E-01 2.84E-02 571737 4096616 10 2094 BOUNDARY 2.74E-07 7.36E-01 1.23E-02 571653 4096549 10 2121 BOUNDARY 1.86E-07 7.27E-01 3.87E-01 573275 4098614 10 1236 GRID 1.70E-07 7.25E-01 1.56E-02 571537 4097016 10 851 GRID 2.72E-06 7.19E-01 5.39E-01 576137 4098616 10 786 GRID 7.16E-08 7.02E-01 1.82E-01 573337 4098816 10 2147 BOUNDARY 3.80E-06 6.91E-01 7.35E-01 575760 4098614 10 2140 BOUNDARY 1.31E-05 6.78E-01 8.09E-01 576360 4097850 10 2145 BOUNDARY 2.74E-06 6.68E-01 5.46E-01 576160 4098614 10 1006 GRID 6.36E-06 6.51E-01 5.84E-01 576537 4098016 10

C-4

2143 BOUNDARY 2.60E-06 6.28E-01 5.62E-01 576360 4098450 10 849 GRID 3.90E-06 6.23E-01 7.33E-01 575737 4098616 10 1056 GRID 1.33E-05 6.11E-01 6.73E-01 576337 4097816 10 955 GRID 3.55E-06 6.06E-01 5.06E-01 576537 4098216 10 2095 BOUNDARY 2.41E-07 6.00E-01 2.89E-02 571732 4096733 10 1051 GRID 1.56E-07 5.48E-01 3.00E-01 575337 4097816 10 1286 GRID 9.19E-07 5.15E-01 9.30E-03 571337 4096816 10 1057 GRID 9.29E-06 4.89E-01 5.16E-01 576537 4097816 10 943 GRID 1.56E-07 4.77E-01 4.38E-01 574137 4098216 10 892 GRID 4.95E-07 4.76E-01 4.53E-01 574137 4098416 10 1000 GRID 6.78E-07 4.72E-01 4.78E-01 575337 4098016 10 899 GRID 4.51E-06 4.55E-01 1.02E+00 575537 4098416 10 994 GRID 1.64E-07 4.54E-01 4.58E-01 574137 4098016 10 1235 GRID 4.57E-07 4.51E-01 1.48E-01 571337 4097016 10 841 GRID 8.20E-07 4.50E-01 4.70E-01 574137 4098616 10 1288 GRID 1.84E-07 4.45E-01 3.69E-02 571737 4096816 10 1007 GRID 4.43E-06 4.35E-01 5.33E-01 576737 4098016 10 1102 GRID 1.52E-07 4.35E-01 3.27E-01 575337 4097616 10 1337 GRID 3.88E-07 4.27E-01 9.01E-03 571337 4096616 10 1043 GRID 1.81E-07 4.18E-01 5.51E-01 573737 4097816 10 1042 GRID 1.69E-07 4.08E-01 5.67E-01 573537 4097816 10 1340 GRID 1.75E-07 4.06E-01 9.46E-02 571937 4096616 10 1106 GRID 2.19E-07 4.03E-01 3.47E-01 576137 4097616 10 1105 GRID 1.56E-07 3.91E-01 2.74E-01 575937 4097616 10 904 GRID 2.29E-06 3.91E-01 4.73E-01 576537 4098416 10 1044 GRID 1.97E-07 3.89E-01 5.00E-01 573937 4097816 10 1103 GRID 1.48E-07 3.89E-01 2.55E-01 575537 4097616 10 1101 GRID 1.63E-07 3.88E-01 3.07E-01 575137 4097616 10 852 GRID 2.36E-06 3.82E-01 5.02E-01 576337 4098616 10 1058 GRID 4.98E-06 3.81E-01 3.51E-01 576737 4097816 10 2098 BOUNDARY 1.06E-07 3.80E-01 9.63E-03 571663 4097054 10 790 GRID 7.74E-07 3.76E-01 4.36E-01 574137 4098816 10 1390 GRID 3.01E-07 3.63E-01 3.51E-02 571737 4096416 10 2115 BOUNDARY 1.79E-07 3.62E-01 4.11E-01 574192 4098368 10 2144 BOUNDARY 2.34E-06 3.62E-01 4.94E-01 576360 4098614 10 1050 GRID 1.34E-07 3.60E-01 3.37E-01 575137 4097816 10 2114 BOUNDARY 1.18E-07 3.59E-01 3.85E-01 574192 4098168 10 1041 GRID 1.43E-07 3.57E-01 4.90E-01 573337 4097816 10 2116 BOUNDARY 7.32E-07 3.57E-01 4.54E-01 574192 4098455 10 2139 BOUNDARY 1.14E-05 3.57E-01 7.14E-01 576360 4097650 10 956 GRID 3.07E-06 3.55E-01 4.02E-01 576737 4098216 10 799 GRID 2.78E-06 3.50E-01 4.86E-01 575937 4098816 10 RECEPTORS WITH HIGHEST ACUTE HI REC TYPE CANCER CHRONIC ACUTE UTME UTMN ZONE 1003 GRID 2.28E-05 6.11E+00 2.21E+00 575937 4098016 10 951 GRID 9.09E-06 3.97E+00 2.15E+00 575737 4098216 10 950 GRID 7.50E-06 7.98E-01 1.55E+00 575537 4098216 10 952 GRID 6.84E-06 7.73E+00 1.38E+00 575937 4098216 10 933 GRID 3.10E-07 6.53E-02 1.23E+00 572137 4098216 10 932 GRID 2.84E-07 6.16E-02 1.14E+00 571937 4098216 10 900 GRID 5.78E-06 3.22E+00 1.09E+00 575737 4098416 10 949 GRID 3.52E-06 3.13E-01 1.09E+00 575337 4098216 10 882 GRID 2.65E-07 5.17E-02 1.09E+00 572137 4098416 10 984 GRID 3.19E-07 7.22E-02 1.08E+00 572137 4098016 10 980 GRID 2.30E-07 5.40E-02 1.08E+00 571337 4098016 10 1004 GRID 1.42E-05 3.42E+00 1.05E+00 576137 4098016 10

C-5

934 GRID 3.17E-07 7.02E-02 1.03E+00 572337 4098216 10 899 GRID 4.51E-06 4.55E-01 1.02E+00 575537 4098416 10 883 GRID 3.39E-07 6.70E-02 1.02E+00 572337 4098416 10 901 GRID 3.85E-06 6.86E+00 9.97E-01 575937 4098416 10 930 GRID 2.29E-07 5.22E-02 9.82E-01 571537 4098216 10 983 GRID 2.44E-07 6.26E-02 9.70E-01 571937 4098016 10 831 GRID 2.62E-07 4.85E-02 9.69E-01 572137 4098616 10 929 GRID 2.70E-07 6.32E-02 9.68E-01 571337 4098216 10 985 GRID 3.18E-07 8.25E-02 9.61E-01 572337 4098016 10 2174 CENSUS 4.03E-06 6.96E+00 9.24E-01 575998 4098406 10 1244 GRID 4.81E-07 1.10E-01 9.20E-01 573137 4097016 10 953 GRID 4.89E-06 4.18E+00 9.10E-01 576137 4098216 10 981 GRID 2.17E-07 5.90E-02 9.06E-01 571537 4098016 10 1034 GRID 3.10E-07 7.49E-02 9.05E-01 571937 4097816 10 878 GRID 2.07E-07 4.89E-02 8.82E-01 571337 4098416 10 1031 GRID 1.93E-07 6.50E-02 8.73E-01 571337 4097816 10 780 GRID 2.59E-07 4.56E-02 8.63E-01 572137 4098816 10 1194 GRID 3.32E-07 1.04E-01 8.35E-01 573337 4097216 10 1035 GRID 3.02E-07 8.30E-02 8.29E-01 572137 4097816 10 1032 GRID 1.88E-07 7.09E-02 8.13E-01 571537 4097816 10 2140 BOUNDARY 1.31E-05 6.78E-01 8.09E-01 576360 4097850 10 1245 GRID 4.67E-07 1.07E-01 8.08E-01 573337 4097016 10 826 GRID 2.21E-07 5.23E-02 7.92E-01 571137 4098616 10 879 GRID 2.92E-07 6.59E-02 7.90E-01 571537 4098416 10 1002 GRID 3.13E-06 3.28E+00 7.88E-01 575737 4098016 10 1005 GRID 8.84E-06 1.11E+00 7.67E-01 576337 4098016 10 1294 GRID 6.27E-07 1.49E-01 7.50E-01 572937 4096816 10 902 GRID 3.73E-06 3.53E+00 7.50E-01 576137 4098416 10 876 GRID 2.62E-07 6.26E-02 7.48E-01 570937 4098416 10 782 GRID 2.21E-07 5.55E-02 7.47E-01 572537 4098816 10 776 GRID 1.80E-07 4.26E-02 7.46E-01 571337 4098816 10 931 GRID 2.62E-07 5.74E-02 7.44E-01 571737 4098216 10 723 GRID 2.59E-07 5.54E-02 7.42E-01 570937 4099016 10 730 GRID 2.52E-07 4.43E-02 7.36E-01 572337 4099016 10 2147 BOUNDARY 3.80E-06 6.91E-01 7.35E-01 575760 4098614 10 849 GRID 3.90E-06 6.23E-01 7.33E-01 575737 4098616 10 1107 GRID 1.05E-05 3.41E-01 7.31E-01 576337 4097616 10 2139 BOUNDARY 1.14E-05 3.57E-01 7.14E-01 576360 4097650 10 2141 BOUNDARY 7.15E-06 1.06E+00 7.12E-01 576360 4098050 10 898 GRID 2.80E-06 2.40E-01 7.07E-01 575337 4098416 10 2151 BOUNDARY 2.85E-06 1.84E-01 7.06E-01 575213 4098472 10 731 GRID 2.56E-07 4.98E-02 7.06E-01 572537 4099016 10 1083 GRID 1.08E-07 9.21E-02 7.04E-01 571537 4097616 10 672 GRID 2.67E-07 5.51E-02 7.03E-01 570937 4099216 10 2180 CENSUS 2.69E-07 5.87E-02 7.01E-01 570858 4099037 10 725 GRID 1.68E-07 3.99E-02 6.96E-01 571337 4099016 10 679 GRID 2.17E-07 4.01E-02 6.91E-01 572337 4099216 10 1090 GRID 1.94E-07 1.45E-01 6.91E-01 572937 4097616 10 848 GRID 3.47E-06 3.16E-01 6.87E-01 575537 4098616 10 774 GRID 2.78E-07 6.21E-02 6.87E-01 570937 4098816 10 2148 BOUNDARY 3.51E-06 3.40E-01 6.86E-01 575560 4098614 10 2149 BOUNDARY 2.84E-06 2.06E-01 6.78E-01 575360 4098614 10 1143 GRID 2.48E-07 1.22E-01 6.77E-01 573337 4097416 10 1296 GRID 5.75E-07 1.34E-01 6.73E-01 573337 4096816 10 1056 GRID 1.33E-05 6.11E-01 6.73E-01 576337 4097816 10 1033 GRID 1.81E-07 7.09E-02 6.70E-01 571737 4097816 10 2150 BOUNDARY 2.94E-06 2.04E-01 6.70E-01 575355 4098614 10

C-6

1295 GRID 5.86E-07 1.39E-01 6.66E-01 573137 4096816 10 850 GRID 3.51E-06 9.27E-01 6.66E-01 575937 4098616 10 1092 GRID 2.86E-07 1.74E-01 6.54E-01 573337 4097616 10 674 GRID 2.08E-07 4.75E-02 6.53E-01 571337 4099216 10 1040 GRID 1.83E-07 2.49E-01 6.52E-01 573137 4097816 10 827 GRID 1.50E-07 3.84E-02 6.50E-01 571337 4098616 10 2146 BOUNDARY 3.35E-06 9.41E-01 6.46E-01 575960 4098614 10 1350 GRID 6.72E-07 1.54E-01 6.45E-01 573937 4096616 10 847 GRID 2.95E-06 1.97E-01 6.44E-01 575337 4098616 10 775 GRID 2.27E-07 5.32E-02 6.41E-01 571137 4098816 10 673 GRID 2.61E-07 5.67E-02 6.40E-01 571137 4099216 10 622 GRID 2.73E-07 5.40E-02 6.38E-01 571137 4099416 10 1144 GRID 2.68E-07 1.25E-01 6.37E-01 573537 4097416 10 880 GRID 2.44E-07 5.33E-02 6.36E-01 571737 4098416 10 680 GRID 2.95E-07 4.33E-02 6.36E-01 572537 4099216 10 875 GRID 1.54E-07 3.61E-02 6.34E-01 570737 4098416 10 1082 GRID 1.65E-07 8.25E-02 6.31E-01 571337 4097616 10 954 GRID 4.03E-06 1.18E+00 6.30E-01 576337 4098216 10 1184 GRID 4.05E-07 1.92E-01 6.23E-01 571337 4097216 10 990 GRID 1.89E-07 7.99E-01 6.23E-01 573337 4098016 10 681 GRID 2.66E-07 5.06E-02 6.19E-01 572737 4099216 10 772 GRID 1.82E-07 4.34E-02 6.17E-01 570537 4098816 10 2129 BOUNDARY 1.90E-07 3.04E-01 6.16E-01 573482 4097768 10 823 GRID 1.36E-07 3.15E-02 6.16E-01 570537 4098616 10 623 GRID 2.46E-07 5.15E-02 6.15E-01 571337 4099416 10 881 GRID 2.27E-07 4.98E-02 6.13E-01 571937 4098416 10 846 GRID 2.08E-06 1.47E-01 6.10E-01 575137 4098616 10 829 GRID 1.08E-07 4.36E-02 6.08E-01 571737 4098616 10 621 GRID 2.35E-07 4.92E-02 6.08E-01 570937 4099416 10 928 GRID 1.69E-07 4.28E-02 6.06E-01 571137 4098216 10 625 GRID 2.79E-07 4.69E-02 6.05E-01 571737 4099416 10

C-7

These results were used to calculate ACUTE IMPACTS (Acute HI) FILE: C:\RMC_Oct_HARP\73_meter_outputs\Rep_PMI.txt EXCEPTION REPORT (there have been no changes or exceptions) RECEPTORS WITH HIGHEST CANCER RISK REC TYPE CANCER CHRONIC ACUTE UTME UTMN ZONE 952 GRID -1.00E+00 -1.00E+00 2.33E+00 575937 4098216 10 933 GRID -1.00E+00 -1.00E+00 1.23E+00 572137 4098216 10 932 GRID -1.00E+00 -1.00E+00 1.14E+00 571937 4098216 10 882 GRID -1.00E+00 -1.00E+00 1.09E+00 572137 4098416 10 980 GRID -1.00E+00 -1.00E+00 1.08E+00 571337 4098016 10 984 GRID -1.00E+00 -1.00E+00 1.08E+00 572137 4098016 10 934 GRID -1.00E+00 -1.00E+00 1.02E+00 572337 4098216 10 883 GRID -1.00E+00 -1.00E+00 1.01E+00 572337 4098416 10 930 GRID -1.00E+00 -1.00E+00 9.81E-01 571537 4098216 10 983 GRID -1.00E+00 -1.00E+00 9.71E-01 571937 4098016 10 929 GRID -1.00E+00 -1.00E+00 9.67E-01 571337 4098216 10 831 GRID -1.00E+00 -1.00E+00 9.66E-01 572137 4098616 10 985 GRID -1.00E+00 -1.00E+00 9.61E-01 572337 4098016 10 1244 GRID -1.00E+00 -1.00E+00 9.15E-01 573137 4097016 10 981 GRID -1.00E+00 -1.00E+00 9.08E-01 571537 4098016 10 1034 GRID -1.00E+00 -1.00E+00 9.02E-01 571937 4097816 10 878 GRID -1.00E+00 -1.00E+00 8.80E-01 571337 4098416 10 1031 GRID -1.00E+00 -1.00E+00 8.73E-01 571337 4097816 10 780 GRID -1.00E+00 -1.00E+00 8.57E-01 572137 4098816 10 1194 GRID -1.00E+00 -1.00E+00 8.27E-01 573337 4097216 10 1035 GRID -1.00E+00 -1.00E+00 8.26E-01 572137 4097816 10 1032 GRID -1.00E+00 -1.00E+00 8.12E-01 571537 4097816 10 1245 GRID -1.00E+00 -1.00E+00 8.03E-01 573337 4097016 10 826 GRID -1.00E+00 -1.00E+00 7.91E-01 571137 4098616 10 879 GRID -1.00E+00 -1.00E+00 7.87E-01 571537 4098416 10 776 GRID -1.00E+00 -1.00E+00 7.49E-01 571337 4098816 10 1294 GRID -1.00E+00 -1.00E+00 7.48E-01 572937 4096816 10 876 GRID -1.00E+00 -1.00E+00 7.46E-01 570937 4098416 10 782 GRID -1.00E+00 -1.00E+00 7.43E-01 572537 4098816 10 723 GRID -1.00E+00 -1.00E+00 7.42E-01 570937 4099016 10 931 GRID -1.00E+00 -1.00E+00 7.42E-01 571737 4098216 10 851 GRID -1.00E+00 -1.00E+00 7.26E-01 576137 4098616 10 730 GRID -1.00E+00 -1.00E+00 7.17E-01 572337 4099016 10 2145 BOUNDARY -1.00E+00 -1.00E+00 7.13E-01 576160 4098614 10 1083 GRID -1.00E+00 -1.00E+00 7.02E-01 571537 4097616 10 2180 CENSUS -1.00E+00 -1.00E+00 7.00E-01 570858 4099037 10 672 GRID -1.00E+00 -1.00E+00 6.98E-01 570937 4099216 10 725 GRID -1.00E+00 -1.00E+00 6.96E-01 571337 4099016 10 731 GRID -1.00E+00 -1.00E+00 6.91E-01 572537 4099016 10 774 GRID -1.00E+00 -1.00E+00 6.89E-01 570937 4098816 10 1090 GRID -1.00E+00 -1.00E+00 6.87E-01 572937 4097616 10 679 GRID -1.00E+00 -1.00E+00 6.85E-01 572337 4099216 10 1143 GRID -1.00E+00 -1.00E+00 6.71E-01 573337 4097416 10 1296 GRID -1.00E+00 -1.00E+00 6.70E-01 573337 4096816 10 1033 GRID -1.00E+00 -1.00E+00 6.69E-01 571737 4097816 10 1295 GRID -1.00E+00 -1.00E+00 6.63E-01 573137 4096816 10

C-8

827 GRID -1.00E+00 -1.00E+00 6.50E-01 571337 4098616 10 674 GRID -1.00E+00 -1.00E+00 6.49E-01 571337 4099216 10 1092 GRID -1.00E+00 -1.00E+00 6.47E-01 573337 4097616 10 775 GRID -1.00E+00 -1.00E+00 6.44E-01 571137 4098816 10 1040 GRID -1.00E+00 -1.00E+00 6.43E-01 573137 4097816 10 1350 GRID -1.00E+00 -1.00E+00 6.39E-01 573937 4096616 10 673 GRID -1.00E+00 -1.00E+00 6.37E-01 571137 4099216 10 622 GRID -1.00E+00 -1.00E+00 6.33E-01 571137 4099416 10 880 GRID -1.00E+00 -1.00E+00 6.33E-01 571737 4098416 10 875 GRID -1.00E+00 -1.00E+00 6.32E-01 570737 4098416 10 1082 GRID -1.00E+00 -1.00E+00 6.29E-01 571337 4097616 10 1144 GRID -1.00E+00 -1.00E+00 6.26E-01 573537 4097416 10 1184 GRID -1.00E+00 -1.00E+00 6.23E-01 571337 4097216 10 772 GRID -1.00E+00 -1.00E+00 6.18E-01 570537 4098816 10 623 GRID -1.00E+00 -1.00E+00 6.15E-01 571337 4099416 10 823 GRID -1.00E+00 -1.00E+00 6.15E-01 570537 4098616 10 990 GRID -1.00E+00 -1.00E+00 6.15E-01 573337 4098016 10 829 GRID -1.00E+00 -1.00E+00 6.09E-01 571737 4098616 10 881 GRID -1.00E+00 -1.00E+00 6.09E-01 571937 4098416 10 2129 BOUNDARY -1.00E+00 -1.00E+00 6.07E-01 573482 4097768 10 621 GRID -1.00E+00 -1.00E+00 6.06E-01 570937 4099416 10 928 GRID -1.00E+00 -1.00E+00 6.06E-01 571137 4098216 10 681 GRID -1.00E+00 -1.00E+00 6.05E-01 572737 4099216 10 625 GRID -1.00E+00 -1.00E+00 5.95E-01 571737 4099416 10 680 GRID -1.00E+00 -1.00E+00 5.95E-01 572537 4099216 10 572 GRID -1.00E+00 -1.00E+00 5.91E-01 571337 4099616 10 1199 GRID -1.00E+00 -1.00E+00 5.88E-01 574337 4097216 10 781 GRID -1.00E+00 -1.00E+00 5.87E-01 572337 4098816 10 1093 GRID -1.00E+00 -1.00E+00 5.80E-01 573537 4097616 10 1057 GRID -1.00E+00 -1.00E+00 5.79E-01 576537 4097816 10 732 GRID -1.00E+00 -1.00E+00 5.78E-01 572737 4099016 10 720 GRID -1.00E+00 -1.00E+00 5.77E-01 570337 4099016 10 982 GRID -1.00E+00 -1.00E+00 5.77E-01 571737 4098016 10 1349 GRID -1.00E+00 -1.00E+00 5.77E-01 573737 4096616 10 1148 GRID -1.00E+00 -1.00E+00 5.76E-01 574337 4097416 10 1351 GRID -1.00E+00 -1.00E+00 5.70E-01 574137 4096616 10 571 GRID -1.00E+00 -1.00E+00 5.64E-01 571137 4099616 10 777 GRID -1.00E+00 -1.00E+00 5.64E-01 571537 4098816 10 468 GRID -1.00E+00 -1.00E+00 5.63E-01 570937 4100016 10 1145 GRID -1.00E+00 -1.00E+00 5.61E-01 573737 4097416 10 1042 GRID -1.00E+00 -1.00E+00 5.57E-01 573537 4097816 10 2130 BOUNDARY -1.00E+00 -1.00E+00 5.54E-01 573682 4097768 10 1402 GRID -1.00E+00 -1.00E+00 5.52E-01 574137 4096416 10 2126 BOUNDARY -1.00E+00 -1.00E+00 5.52E-01 573082 4097814 10 991 GRID -1.00E+00 -1.00E+00 5.46E-01 573537 4098016 10 2127 BOUNDARY -1.00E+00 -1.00E+00 5.46E-01 573082 4097768 10 629 GRID -1.00E+00 -1.00E+00 5.45E-01 572537 4099416 10 1030 GRID -1.00E+00 -1.00E+00 5.44E-01 571137 4097816 10 2100 BOUNDARY -1.00E+00 -1.00E+00 5.43E-01 571364 4097320 10 830 GRID -1.00E+00 -1.00E+00 5.42E-01 571937 4098616 10 570 GRID -1.00E+00 -1.00E+00 5.40E-01 570937 4099616 10 1043 GRID -1.00E+00 -1.00E+00 5.39E-01 573737 4097816 10 939 GRID -1.00E+00 -1.00E+00 5.37E-01 573337 4098216 10 523 GRID -1.00E+00 -1.00E+00 5.34E-01 571737 4099816 10 RECEPTORS WITH HIGHEST CHRONIC HI REC TYPE CANCER CHRONIC ACUTE UTME UTMN ZONE

C-9

952 GRID -1.00E+00 -1.00E+00 2.33E+00 575937 4098216 10 933 GRID -1.00E+00 -1.00E+00 1.23E+00 572137 4098216 10 932 GRID -1.00E+00 -1.00E+00 1.14E+00 571937 4098216 10 882 GRID -1.00E+00 -1.00E+00 1.09E+00 572137 4098416 10 980 GRID -1.00E+00 -1.00E+00 1.08E+00 571337 4098016 10 984 GRID -1.00E+00 -1.00E+00 1.08E+00 572137 4098016 10 934 GRID -1.00E+00 -1.00E+00 1.02E+00 572337 4098216 10 883 GRID -1.00E+00 -1.00E+00 1.01E+00 572337 4098416 10 930 GRID -1.00E+00 -1.00E+00 9.81E-01 571537 4098216 10 983 GRID -1.00E+00 -1.00E+00 9.71E-01 571937 4098016 10 929 GRID -1.00E+00 -1.00E+00 9.67E-01 571337 4098216 10 831 GRID -1.00E+00 -1.00E+00 9.66E-01 572137 4098616 10 985 GRID -1.00E+00 -1.00E+00 9.61E-01 572337 4098016 10 1244 GRID -1.00E+00 -1.00E+00 9.15E-01 573137 4097016 10 981 GRID -1.00E+00 -1.00E+00 9.08E-01 571537 4098016 10 1034 GRID -1.00E+00 -1.00E+00 9.02E-01 571937 4097816 10 878 GRID -1.00E+00 -1.00E+00 8.80E-01 571337 4098416 10 1031 GRID -1.00E+00 -1.00E+00 8.73E-01 571337 4097816 10 780 GRID -1.00E+00 -1.00E+00 8.57E-01 572137 4098816 10 1194 GRID -1.00E+00 -1.00E+00 8.27E-01 573337 4097216 10 1035 GRID -1.00E+00 -1.00E+00 8.26E-01 572137 4097816 10 1032 GRID -1.00E+00 -1.00E+00 8.12E-01 571537 4097816 10 1245 GRID -1.00E+00 -1.00E+00 8.03E-01 573337 4097016 10 826 GRID -1.00E+00 -1.00E+00 7.91E-01 571137 4098616 10 879 GRID -1.00E+00 -1.00E+00 7.87E-01 571537 4098416 10 776 GRID -1.00E+00 -1.00E+00 7.49E-01 571337 4098816 10 1294 GRID -1.00E+00 -1.00E+00 7.48E-01 572937 4096816 10 876 GRID -1.00E+00 -1.00E+00 7.46E-01 570937 4098416 10 782 GRID -1.00E+00 -1.00E+00 7.43E-01 572537 4098816 10 723 GRID -1.00E+00 -1.00E+00 7.42E-01 570937 4099016 10 931 GRID -1.00E+00 -1.00E+00 7.42E-01 571737 4098216 10 851 GRID -1.00E+00 -1.00E+00 7.26E-01 576137 4098616 10 730 GRID -1.00E+00 -1.00E+00 7.17E-01 572337 4099016 10 2145 BOUNDARY -1.00E+00 -1.00E+00 7.13E-01 576160 4098614 10 1083 GRID -1.00E+00 -1.00E+00 7.02E-01 571537 4097616 10 2180 CENSUS -1.00E+00 -1.00E+00 7.00E-01 570858 4099037 10 672 GRID -1.00E+00 -1.00E+00 6.98E-01 570937 4099216 10 725 GRID -1.00E+00 -1.00E+00 6.96E-01 571337 4099016 10 731 GRID -1.00E+00 -1.00E+00 6.91E-01 572537 4099016 10 774 GRID -1.00E+00 -1.00E+00 6.89E-01 570937 4098816 10 1090 GRID -1.00E+00 -1.00E+00 6.87E-01 572937 4097616 10 679 GRID -1.00E+00 -1.00E+00 6.85E-01 572337 4099216 10 1143 GRID -1.00E+00 -1.00E+00 6.71E-01 573337 4097416 10 1296 GRID -1.00E+00 -1.00E+00 6.70E-01 573337 4096816 10 1033 GRID -1.00E+00 -1.00E+00 6.69E-01 571737 4097816 10 1295 GRID -1.00E+00 -1.00E+00 6.63E-01 573137 4096816 10 827 GRID -1.00E+00 -1.00E+00 6.50E-01 571337 4098616 10 674 GRID -1.00E+00 -1.00E+00 6.49E-01 571337 4099216 10 1092 GRID -1.00E+00 -1.00E+00 6.47E-01 573337 4097616 10 775 GRID -1.00E+00 -1.00E+00 6.44E-01 571137 4098816 10 1040 GRID -1.00E+00 -1.00E+00 6.43E-01 573137 4097816 10 1350 GRID -1.00E+00 -1.00E+00 6.39E-01 573937 4096616 10 673 GRID -1.00E+00 -1.00E+00 6.37E-01 571137 4099216 10 622 GRID -1.00E+00 -1.00E+00 6.33E-01 571137 4099416 10 880 GRID -1.00E+00 -1.00E+00 6.33E-01 571737 4098416 10 875 GRID -1.00E+00 -1.00E+00 6.32E-01 570737 4098416 10 1082 GRID -1.00E+00 -1.00E+00 6.29E-01 571337 4097616 10

C-10

1144 GRID -1.00E+00 -1.00E+00 6.26E-01 573537 4097416 10 1184 GRID -1.00E+00 -1.00E+00 6.23E-01 571337 4097216 10 772 GRID -1.00E+00 -1.00E+00 6.18E-01 570537 4098816 10 623 GRID -1.00E+00 -1.00E+00 6.15E-01 571337 4099416 10 823 GRID -1.00E+00 -1.00E+00 6.15E-01 570537 4098616 10 990 GRID -1.00E+00 -1.00E+00 6.15E-01 573337 4098016 10 829 GRID -1.00E+00 -1.00E+00 6.09E-01 571737 4098616 10 881 GRID -1.00E+00 -1.00E+00 6.09E-01 571937 4098416 10 2129 BOUNDARY -1.00E+00 -1.00E+00 6.07E-01 573482 4097768 10 621 GRID -1.00E+00 -1.00E+00 6.06E-01 570937 4099416 10 928 GRID -1.00E+00 -1.00E+00 6.06E-01 571137 4098216 10 681 GRID -1.00E+00 -1.00E+00 6.05E-01 572737 4099216 10 625 GRID -1.00E+00 -1.00E+00 5.95E-01 571737 4099416 10 680 GRID -1.00E+00 -1.00E+00 5.95E-01 572537 4099216 10 572 GRID -1.00E+00 -1.00E+00 5.91E-01 571337 4099616 10 1199 GRID -1.00E+00 -1.00E+00 5.88E-01 574337 4097216 10 781 GRID -1.00E+00 -1.00E+00 5.87E-01 572337 4098816 10 1093 GRID -1.00E+00 -1.00E+00 5.80E-01 573537 4097616 10 1057 GRID -1.00E+00 -1.00E+00 5.79E-01 576537 4097816 10 732 GRID -1.00E+00 -1.00E+00 5.78E-01 572737 4099016 10 720 GRID -1.00E+00 -1.00E+00 5.77E-01 570337 4099016 10 982 GRID -1.00E+00 -1.00E+00 5.77E-01 571737 4098016 10 1349 GRID -1.00E+00 -1.00E+00 5.77E-01 573737 4096616 10 1148 GRID -1.00E+00 -1.00E+00 5.76E-01 574337 4097416 10 1351 GRID -1.00E+00 -1.00E+00 5.70E-01 574137 4096616 10 571 GRID -1.00E+00 -1.00E+00 5.64E-01 571137 4099616 10 777 GRID -1.00E+00 -1.00E+00 5.64E-01 571537 4098816 10 468 GRID -1.00E+00 -1.00E+00 5.63E-01 570937 4100016 10 1145 GRID -1.00E+00 -1.00E+00 5.61E-01 573737 4097416 10 1042 GRID -1.00E+00 -1.00E+00 5.57E-01 573537 4097816 10 2130 BOUNDARY -1.00E+00 -1.00E+00 5.54E-01 573682 4097768 10 1402 GRID -1.00E+00 -1.00E+00 5.52E-01 574137 4096416 10 2126 BOUNDARY -1.00E+00 -1.00E+00 5.52E-01 573082 4097814 10 991 GRID -1.00E+00 -1.00E+00 5.46E-01 573537 4098016 10 2127 BOUNDARY -1.00E+00 -1.00E+00 5.46E-01 573082 4097768 10 629 GRID -1.00E+00 -1.00E+00 5.45E-01 572537 4099416 10 1030 GRID -1.00E+00 -1.00E+00 5.44E-01 571137 4097816 10 2100 BOUNDARY -1.00E+00 -1.00E+00 5.43E-01 571364 4097320 10 830 GRID -1.00E+00 -1.00E+00 5.42E-01 571937 4098616 10 570 GRID -1.00E+00 -1.00E+00 5.40E-01 570937 4099616 10 1043 GRID -1.00E+00 -1.00E+00 5.39E-01 573737 4097816 10 939 GRID -1.00E+00 -1.00E+00 5.37E-01 573337 4098216 10 523 GRID -1.00E+00 -1.00E+00 5.34E-01 571737 4099816 10 RECEPTORS WITH HIGHEST ACUTE HI REC TYPE CANCER CHRONIC ACUTE UTME UTMN ZONE 952 GRID -1.00E+00 -1.00E+00 2.33E+00 575937 4098216 10 933 GRID -1.00E+00 -1.00E+00 1.23E+00 572137 4098216 10 932 GRID -1.00E+00 -1.00E+00 1.14E+00 571937 4098216 10 882 GRID -1.00E+00 -1.00E+00 1.09E+00 572137 4098416 10 980 GRID -1.00E+00 -1.00E+00 1.08E+00 571337 4098016 10 984 GRID -1.00E+00 -1.00E+00 1.08E+00 572137 4098016 10 934 GRID -1.00E+00 -1.00E+00 1.02E+00 572337 4098216 10 883 GRID -1.00E+00 -1.00E+00 1.01E+00 572337 4098416 10 930 GRID -1.00E+00 -1.00E+00 9.81E-01 571537 4098216 10 983 GRID -1.00E+00 -1.00E+00 9.71E-01 571937 4098016 10 929 GRID -1.00E+00 -1.00E+00 9.67E-01 571337 4098216 10

C-11

831 GRID -1.00E+00 -1.00E+00 9.66E-01 572137 4098616 10 985 GRID -1.00E+00 -1.00E+00 9.61E-01 572337 4098016 10 1244 GRID -1.00E+00 -1.00E+00 9.15E-01 573137 4097016 10 981 GRID -1.00E+00 -1.00E+00 9.08E-01 571537 4098016 10 1034 GRID -1.00E+00 -1.00E+00 9.02E-01 571937 4097816 10 878 GRID -1.00E+00 -1.00E+00 8.80E-01 571337 4098416 10 1031 GRID -1.00E+00 -1.00E+00 8.73E-01 571337 4097816 10 780 GRID -1.00E+00 -1.00E+00 8.57E-01 572137 4098816 10 1194 GRID -1.00E+00 -1.00E+00 8.27E-01 573337 4097216 10 1035 GRID -1.00E+00 -1.00E+00 8.26E-01 572137 4097816 10 1032 GRID -1.00E+00 -1.00E+00 8.12E-01 571537 4097816 10 1245 GRID -1.00E+00 -1.00E+00 8.03E-01 573337 4097016 10 826 GRID -1.00E+00 -1.00E+00 7.91E-01 571137 4098616 10 879 GRID -1.00E+00 -1.00E+00 7.87E-01 571537 4098416 10 776 GRID -1.00E+00 -1.00E+00 7.49E-01 571337 4098816 10 1294 GRID -1.00E+00 -1.00E+00 7.48E-01 572937 4096816 10 876 GRID -1.00E+00 -1.00E+00 7.46E-01 570937 4098416 10 782 GRID -1.00E+00 -1.00E+00 7.43E-01 572537 4098816 10 723 GRID -1.00E+00 -1.00E+00 7.42E-01 570937 4099016 10 931 GRID -1.00E+00 -1.00E+00 7.42E-01 571737 4098216 10 851 GRID -1.00E+00 -1.00E+00 7.26E-01 576137 4098616 10 730 GRID -1.00E+00 -1.00E+00 7.17E-01 572337 4099016 10 2145 BOUNDARY -1.00E+00 -1.00E+00 7.13E-01 576160 4098614 10 1083 GRID -1.00E+00 -1.00E+00 7.02E-01 571537 4097616 10 2180 CENSUS -1.00E+00 -1.00E+00 7.00E-01 570858 4099037 10 672 GRID -1.00E+00 -1.00E+00 6.98E-01 570937 4099216 10 725 GRID -1.00E+00 -1.00E+00 6.96E-01 571337 4099016 10 731 GRID -1.00E+00 -1.00E+00 6.91E-01 572537 4099016 10 774 GRID -1.00E+00 -1.00E+00 6.89E-01 570937 4098816 10 1090 GRID -1.00E+00 -1.00E+00 6.87E-01 572937 4097616 10 679 GRID -1.00E+00 -1.00E+00 6.85E-01 572337 4099216 10 1143 GRID -1.00E+00 -1.00E+00 6.71E-01 573337 4097416 10 1296 GRID -1.00E+00 -1.00E+00 6.70E-01 573337 4096816 10 1033 GRID -1.00E+00 -1.00E+00 6.69E-01 571737 4097816 10 1295 GRID -1.00E+00 -1.00E+00 6.63E-01 573137 4096816 10 827 GRID -1.00E+00 -1.00E+00 6.50E-01 571337 4098616 10 674 GRID -1.00E+00 -1.00E+00 6.49E-01 571337 4099216 10 1092 GRID -1.00E+00 -1.00E+00 6.47E-01 573337 4097616 10 775 GRID -1.00E+00 -1.00E+00 6.44E-01 571137 4098816 10 1040 GRID -1.00E+00 -1.00E+00 6.43E-01 573137 4097816 10 1350 GRID -1.00E+00 -1.00E+00 6.39E-01 573937 4096616 10 673 GRID -1.00E+00 -1.00E+00 6.37E-01 571137 4099216 10 622 GRID -1.00E+00 -1.00E+00 6.33E-01 571137 4099416 10 880 GRID -1.00E+00 -1.00E+00 6.33E-01 571737 4098416 10 875 GRID -1.00E+00 -1.00E+00 6.32E-01 570737 4098416 10 1082 GRID -1.00E+00 -1.00E+00 6.29E-01 571337 4097616 10 1144 GRID -1.00E+00 -1.00E+00 6.26E-01 573537 4097416 10 1184 GRID -1.00E+00 -1.00E+00 6.23E-01 571337 4097216 10 772 GRID -1.00E+00 -1.00E+00 6.18E-01 570537 4098816 10 623 GRID -1.00E+00 -1.00E+00 6.15E-01 571337 4099416 10 823 GRID -1.00E+00 -1.00E+00 6.15E-01 570537 4098616 10 990 GRID -1.00E+00 -1.00E+00 6.15E-01 573337 4098016 10 829 GRID -1.00E+00 -1.00E+00 6.09E-01 571737 4098616 10 881 GRID -1.00E+00 -1.00E+00 6.09E-01 571937 4098416 10 2129 BOUNDARY -1.00E+00 -1.00E+00 6.07E-01 573482 4097768 10 621 GRID -1.00E+00 -1.00E+00 6.06E-01 570937 4099416 10 928 GRID -1.00E+00 -1.00E+00 6.06E-01 571137 4098216 10

C-12

681 GRID -1.00E+00 -1.00E+00 6.05E-01 572737 4099216 10 625 GRID -1.00E+00 -1.00E+00 5.95E-01 571737 4099416 10 680 GRID -1.00E+00 -1.00E+00 5.95E-01 572537 4099216 10 572 GRID -1.00E+00 -1.00E+00 5.91E-01 571337 4099616 10 1199 GRID -1.00E+00 -1.00E+00 5.88E-01 574337 4097216 10 781 GRID -1.00E+00 -1.00E+00 5.87E-01 572337 4098816 10 1093 GRID -1.00E+00 -1.00E+00 5.80E-01 573537 4097616 10 1057 GRID -1.00E+00 -1.00E+00 5.79E-01 576537 4097816 10 732 GRID -1.00E+00 -1.00E+00 5.78E-01 572737 4099016 10 720 GRID -1.00E+00 -1.00E+00 5.77E-01 570337 4099016 10 982 GRID -1.00E+00 -1.00E+00 5.77E-01 571737 4098016 10 1349 GRID -1.00E+00 -1.00E+00 5.77E-01 573737 4096616 10 1148 GRID -1.00E+00 -1.00E+00 5.76E-01 574337 4097416 10 1351 GRID -1.00E+00 -1.00E+00 5.70E-01 574137 4096616 10 571 GRID -1.00E+00 -1.00E+00 5.64E-01 571137 4099616 10 777 GRID -1.00E+00 -1.00E+00 5.64E-01 571537 4098816 10 468 GRID -1.00E+00 -1.00E+00 5.63E-01 570937 4100016 10 1145 GRID -1.00E+00 -1.00E+00 5.61E-01 573737 4097416 10 1042 GRID -1.00E+00 -1.00E+00 5.57E-01 573537 4097816 10 2130 BOUNDARY -1.00E+00 -1.00E+00 5.54E-01 573682 4097768 10 1402 GRID -1.00E+00 -1.00E+00 5.52E-01 574137 4096416 10 2126 BOUNDARY -1.00E+00 -1.00E+00 5.52E-01 573082 4097814 10 991 GRID -1.00E+00 -1.00E+00 5.46E-01 573537 4098016 10 2127 BOUNDARY -1.00E+00 -1.00E+00 5.46E-01 573082 4097768 10 629 GRID -1.00E+00 -1.00E+00 5.45E-01 572537 4099416 10 1030 GRID -1.00E+00 -1.00E+00 5.44E-01 571137 4097816 10 2100 BOUNDARY -1.00E+00 -1.00E+00 5.43E-01 571364 4097320 10 830 GRID -1.00E+00 -1.00E+00 5.42E-01 571937 4098616 10 570 GRID -1.00E+00 -1.00E+00 5.40E-01 570937 4099616 10 1043 GRID -1.00E+00 -1.00E+00 5.39E-01 573737 4097816 10 939 GRID -1.00E+00 -1.00E+00 5.37E-01 573337 4098216 10 523 GRID -1.00E+00 -1.00E+00 5.34E-01 571737 4099816 10

APPENDIX D

EFFECT OF DOWNWIND TREES ON DISPERSION

D-1

EFFECT OF DOWNWIND TREES ON DISPERSION A grove of trees grows between the CEMEX plant and the town of Davenport. The District requested that a dispersion modeling run be performed in order to determine whether the windbreaking effect that the trees have might cause higher pollutant concentrations in town. When an air stream passes over a building, the air stream can be forced towards the ground in the building’s wake. This phenomenon is called “downwash,” and it can cause the plume from a stack to reach the ground much sooner than it otherwise would. Because the plume reaches the ground sooner, it has had less time to spread out, and concentrations are higher. Downwash is usually not a factor for buildings that are located more than five times the building’s height away from a stack (for the purposes of the downwash calculation, a building’s height is measured from the base of the stack, taking into account the difference in elevation between the land where the stack is located and the land under the building). The computer dispersion model can include downwash effects in its dispersion calculations. In order to assess the possibility that the grove creates a downwash effect, the District requested that the computer model be run with the grove treated as a building of similar dimensions. It should be noted that there is no basis in the literature for treating trees in this way; in fact, because trees are permeable and buildings are not, the effect of a grove on trees on dispersion is different than the effect of a building. Nevertheless, the run was made. The calculated concentrations in this run were identical to the run without the trees. This is because the computer model does not consider downwash from buildings that are more than five building heights away. The grove is 70 feet high; the nearest stack is 600 feet away. The main stack is 1400 feet from the grove. Because the grove is far away from the sources, it will not affect the dispersion analysis.