WSRC-TR-95-07 41 -& Unclassified

H-AREA ACID/CAUSTIC BASIN GROUNDWATER MONITORING

REPORT (U)

Publication Date: September 1.995

Authorized Derivative Classifier and Reviewing Official:

UNCLASSlFiED Does Not Contain Unclassified Controlled Nuclear Infonation

Westinghouse Savannah River Company Savannah River Site Aiken, SC 29808

Prepared for the U.S. Department of Energy under Control Contract No. DE-ACU9-89SR18035

WSRGTR-95-014 1-2 Unclassified

This report was prepared as an account of work sponsored by an .agency of.the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or' usefirlncss of any information, apparatus, product, or proass disclosed,.or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, &mark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

This report has been reproduced directly from the best available copy.

Available to DOE and DOE kntractors from the Office of Scientific and Techr;ical Information, P.O. .Box 62, Oak Ridge, TN 37831; prices available from (615) 576-8401.

Available to the public from the National Technical.Infomation Service, U.S. Department of Commerce, 5285 Port Royal Road, Springfield, VA 22161.

DISCLAIMER

Portions of this document may be illegible in electronic image products. lmapes are produced from the best available original dOClUIleIlt

WSRGTR-95-0141-' 2 Unclassified

H-AREA ACID/CAUSTIC BASIN GROUNDWATER MONITORING

REPORT (U)

WSRC-TR-95-0141; a Unclassified

Abstract ~~ ~~~~ ~~

During second quarter 1995, samples coltected from the four HAC monitoring wells at the H-Area Acid/Caustic Basin were analyzed for selected heavy metals, herbicidedpesticides, indicator parameters, major ions, radionuclide indicators, and other constituents. Monitoring results that exceeded the final Primary Drinking Water Standards (PDWS) or the Savannah River Site (SRS) flagging criteria or turbidity standard during third quarter are the focus of this report.

Tritium exceeded the final PDWS in all four HAC wells during second quarter 1995. Aluminum exceeded its Flag 2 criterion in all four HAC wells. Iron was elevated in wells HAC 1,2, and 3.

Groundwater flow direction in the water table beneath the H-Area AcidEaustic Basin was to the northwest during second quarter 1995. This data is consistent with previous quarters, when the flow direction has been to the northwest or the north-northwest.

iii

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WSRGTR-95-0141-4 Unclassified

Contents

Page

Abstract ............................................................................................................................................ iii

List of Figures .................................................................................................................................. vi

List of Tables .................................................................................................................................... vi

Executive Summary ......................................................................................................................... 1

Introduction ...................................................................................................................................... 3

Discussion ........................................................................................................................................ 4

Analytical Results Exceeding Standards ..................................................................................... 4 Turbidity Results Exceeding Standards ...................................................................................... 5 Water Elevations, Flow Directions, and Flow Rates ................................................................... 5 Results for Upgradient vs . Downgradient Wells .......................................................................... 6

Conclusions ..................................................................................................................................... 7

References Cited ............................................................................................................................. 8

Errata ................................................................................................................................................. 9

Groundwater Monitoring Data ..................................................................................................... 4

Appendix A-Final Primary Drinking Water Standards ............................................................ A-1

Appendix &Flagging Criteria ................................................................................................... B-1

Appendix %Figures .................................................................................................................. G1

Appendix LGroundwater Monitoring Results Tables .......................................................... D-1

Appendix E-Datd QualityNsability Assessmeht ..................................................................... E-1

V

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H-Area AciaYCaustic Basin 2

WSRGTR-95014 1-,& unclassifie&

Introduction r

The H-Area AcidEaustic Basin is southwest of the H-Area Canyon Building and north of the H-Area Tank Farm at the Savannah River Site (SRS) (Figure 1, Appendix C). The following description outlines important events at the H-Area Acid/Caustic Basin.

The basin, constructed in the early 1950s, is an unlined earthen pit that received dilute sulfuric acid and sodium hydroxide solutions and other non radioactive wastes from several areas within SRS. The basin provided an area for the mixing and neutratization of the dilute solutions before their discharge into nearby streams

' (Heff ner and Exploration Resources, 1991).

Disposal of acidhustic solutions to the H-Area Acidcaustic Basin was discontinued in 1982; however, the basin received steam condensate from a hose box and drainage from a chemical pad until 1985 (Heffner and Exploration Resources, 1991).

Under the terms of a consent decree signed May 26,1988, by the U.S. District Court (Civil Action 1 :85-2583-6, District of South Carolina, Aiken Division), the basin became subject to requirements of Subtitle C of the Resource Conservation and Recovery Act (RCRA), the South Carolina Hazardous Waste Management Regulations (SCHWMR), and associated regulations on June 1, 1988.

In the summer of 1988, a network of monitoring wells was proposed for the basin to ensure compliance with SCHWMR; in August 1988, four monitoring wells, HAC 1,2, 3, and 4, were installed at the H-Area Acid/Caustic Basin (EPD/EMS, 1994) (Figure 2, Appendix C).

The revised Groundwater Quality Assessment Plan (WSRC, 1991), submitted to the South Carolina Department of Health and Environmental Control (SCDHEC) on April 30, 1991, indicated that the monitoring well network at the H-Area AcidKaustic Basin is sufficient to detect any degradation of the groundwater due to past operations at the basin.

During July through September 1993, with SCDHEC's permission to proceed at risk, S R S stabilized the H- and P-Area Acidcaustic Basins as proposed in the Interim Status Closure Plan for the F-, H-, K-, and P-Area Acidcaustic Basins (Revision 3, February 5, 1992). The basins were dewatered and filled with compacted clay-rich soil, and a vegetative cover of winter- and drought-hardy grass was established.

Each quarter, the Environmental Protection Department/Environmental Monitoring Section (EPD/EMS) samples the monitoring wells at the H-Area AcidCaustic Basin as part of the SRS Groundwater Monitoring Program. The Environmental Restoration Department provides a quarterly report describing the monitoring results to SCDHEC in compliance with SCHWMR.

H-Area Acidcaustic Basin 3 Second Quarter 1995

WSRC-TR-95-0741-2 Unclassified

Discussion

Groundwater Monitoring Data

The groundwater sampling procedure ,(EPD/EMS, 1992) requires evacuation of a minimum of two well volumes and stabilization of pH, specific conductance, and turbidity prior to sample collection. Stability is established when a minimum of three successive measurements, taken within a given time period, are within a specified tolerance range. If a well pumps dry before two well volumes are purged or before stabilization is achieved, it must be revisited within 24 hours for the data to be considered from a single sampling event. On the second visit within 24 hours, samples are taken without purging or stability measurements; thus, these samples may not be representative of the groundwater quality.

During second quarter 1995, samples from the four monitoring wells at the H-Area AcidCaustic Basin were analyzed for selected heavy metals, herbicidedpesticides, indicator parameters, major ions, radionuclide indicators, and other constituents. This report describes monitoring results that exceeded the Safe Drinking Water Act final Primary Drinking Water Standards (PDWS) or screening levels set by the US. Environmental Protection Agency (EPA) (Appendix A); the South Carolina final PDWS for lead (Appendix A); other SRS Flag 2 criteria based on final and proposed PDWS, Secondary Drinking Water Standards, and method detection limits (Appendix B); or the SRS turbidity standard. Constituent levels that equal or exceed the final PDWS, screening levels, or Flag 2 criteria are described as exceeding standards, above standards, or as elevated.

The final PDWS for individual analytes provided in Appendix A may not always match the SRS-flagging criteria provided in Appendix B. The final PDWS are used as guidelines in this compliance report to meet regulatory requirements; the flagging criteria are used by the Environmental Protection Department/Environmental Monitoring Section to identify relative levels of constituents in the groundwater and as guides for scheduling groundwater sampling.

Analytical Results Exceeding Standards

Results for analytes that exceeded the final PDWS (see Appendix A) during second quarter 1995 are summarized in Table 1 (Appendix D). All four HAC wells contained tritium activities that exceeded the final PDWS, with activities ranging from 2.3E+01 to 4.47E41 pCi/mL.

Constituents that exceeded other Flag 2 criteria (see Appendix B) during second quarter 1995 are summarized in Table 2 (Appendix D). Aluminum, which was added to the analytes included in comprehensive analyses beginning first quarter 1993, exceeded its Flag 2 criterion in all four HAC wells, with a maximum concentration of 178 pg/L in well HAC 4. Iron exceeded its Flag 2 criierion in wells HAC 1,2, and 3, with a maximum concentration of 1680 pg/L in HAC 2.

H-Area AciaClCaustic Basin 4 Second Quarter 1995

wSRc-TR-95-0141i& Unclassifi&

Table 3 (Appendix D) presents all of the results for individual wells and indicates the analytical laboratories that conducted the analyses, the dilution factors used in the analyses, and the analyses that received modifiers (which help identify laboratory accuracy and precision) or that exceeded the EPA-approved holding times during second quarter 1995. Constituent results in Table 3 that appear to equal the final PDWS but are not marked in the STcolumn (exceeded final PDWS or screening level) are below the final PDWS in the database. Database results, the results that are compared to the final PDWS, are entered with more significant digits than the results given in this report. Apparent discrepancies are the result of the rounding of reported results.

Table 3 also lists the number of well volumes purged from each well during second quarter 1995 at the H-Area Acid/Caustic Basin. Wells HAC 2 and 3 went dry during purging; thus, they may not have produced representative groundwater samples.

Appendix D provides definitions of the abbreviations and the modifiers used in the results tables as well as descriptions of holding times, data rounding, and data qualification practices.

Appendix E provides a general assessment of the quality and usability of the data provided by EPD/EMS.

Turbidity Results Exceeding Standards

The value of 5 nephelometric turbidity units (NTU), established by EPA (1986) as a general standard for acceptability of groundwater samples, is considered unrealistic for monitoring wells at SRS. Gass (1 989) has documented turbidity measurements ranging up to 5,000 NTU from properly designed wells screened in poorly productive formations, such as those screened in the water table. During the 1989 RCRA Compliance Evaluation Inspection, officials from EPA Region IV indicated that the SRS turbidity standard of 50 NTU is conservative. These officials also agreed that water-table wells in this area often screen nonaquifer formations, rendering development of these wells more difficult due to the low yield and high proportion of mobile fines typical of these formations (Bergren and Bennett, 1989).

During second quarter 1995, none of the HAC wells exceeded the SRS turbidity standard of 50 NTU (Table 3, Appendix D); the highest observed turbidity value was 20.7 NTU in well HAC 2.

Water Elevations, Flow Directions, and Flow Rates

, Water-table elevations and the groundwater flow direction beneath the H-Area AcidEaustic Basin are shown in Figure 3 (Appendix C). The horizontal gradient at tne H-Area AcidCaustic Basin is very low. The northwest groundwater flow direction (using universal transverse Mercator coordinates) was determined from this quarter's water- level elevation$ for wells HAC 1 , 2, 3, and 4. The flow direction for the last two years has been consistently northwest or north-northwest.

, ,

H-Area AcidCaustic Basin 5 Second Quarter 1995

WSRC-T~-95414 1-2 Unclassified

The groundwater flow rate in the water table (Aquifer Zone IIBJ beneath the H-Area AcidCaustic Basin is estimated using the following equation:

Flow (ftlday) = Hvdraulic Conductivitv (ft/dav) x && Porosity (unitless) dl (fi)

A hydraulic conductivity constant of 10 Wday (Geraghty & Miller, 1990) is used as a conseivative estimate (Le., the actual hydraulic conductivity should be somewhat less than 10 ftlday). The effective porosity value is estimated at 20 percent (Killian et al., 1987); dh is the difference in head, and dl is the length of the flow path to the nearest 10 ft. Flow rate estimates vary depending on the hydraulic gradient between wells, the size of the area under consideration, and the number of data points. For this reason, the estimation of flow rate should be considered accurate to an order of magnitude only.

Flow rate per day is calculated to two significant figures using the above equation. This value is then multiplied by 365 and rounded to two significant figures for the flow rate per year.

Using the above equation, with dh = 1 ft and d/= 145 ft, the flow rate estimate for groundwater in the water table beneath the H-Area AcidCaustic Basin (see Figure 3, Appendix C) is as follows:

- 10 x 1 - - 0.34 Wday 0.2 145

0.34 ft/day x 365 days = 125 ftlyear

Results for Upgradient vs. Downgradient Wells

Well HAC 4 is the upgradient well, and wells HAC 1,2, and 3 are the downgradient wells at the H-Area Acidcaustic Basin.

During second quarter 1995, aluminum and tritium were elevated in the upgradient well.

Tritium also exceeded the final PDWS in all three downgradient wells, with the highest activity (4.47E+01 pCi/ml) in well HAC 1, approximately 1.5 times that detected in the other HAC wells. Aluminum exceeded its Flag 2 criterion in all three downgradient wells. Iron, not detected above standards in the upgradient well, exceeded the Flag 2 criterion downgradient wells FAC 1,2, and 3.

H-Area AcioYCaustic Basin 6 Second Quarter 1995

WSRGTR-954141-2 Unclassified

Conclusions

I

Tritium activities exceeded the final PDWS during second quarter 1995 in all four HAC ' wells, with activities from 2.3E+01 to 4.47E+O1 pCiimL. Because historical records indicate that no radionuclides were disposed of at this waste management unit (Heff ner and Exploration Resources, 1991), elevated levels of tritium in the HAC wells are not considered a result of seepage from the acid/caustic basin. Other facilities within H-Area, including the high-level-waste tank farm adjacent to the H-Area Acidcaustic Basin, are possible sources of the tritium.

Aluminum exceeded the Flag 2 criterion in all four HAC wells. Iron exceeded the Flag 2 criterion in all three downgradient wells. Generally, elevated levels of constituents found in downgradient wells but not in upgradient wells at a waste management unit are considered products of the waste management unit. .

WSRGTR-95-0141-2 Unclassified

Errata

In tables with four quarters of data, some values for earlier quarters may differ from values for those same quarters presented in earlier reports because some reanalyses may have been performed by the laboratories after the reports were printed.

Second quarter 1995:

No errata have been reported.

H-Area AciaCaustic Basin 9 Second Quarter 1995

WSRGTR-95-0141-2 Unclassified

H-Area AciNCaustic Basin

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A-2 Second Quarter 1995

WSRCTR-954141-2 Unclassified

Final Primary Drinking Water Standards

Analyte - Unit Level Status Source

Alachlor PdL 2 Final EPA, 1993 Aldicarba PdL 3 Final EPA, 1993

2 Final EPA, 1993 PdL Final EPA, 1993

Antimony PdL 6 Final EPA, 1993

Aldicarb sulfonea Aldicarb sulfoxidea

Arsenic PdL 50 Final EPA, 1993 Asbestos Fibers/L 7,000,000 Final EPA, 1993 Atrazine PdL 3 Final EPA, 1993 Barium PdL 2,000 Final EPA, 1993 Benzene PdL 5 Final EPA, 1993 Benzo[a]pyrene PdL 0.2 Final EPA, 1993 Beryllium PdL 4 Final EPA, 1993 Bis(2-ethylhexyi) phthalate PdL 6 Final EPA, 1993 Bromodic hloromethane PdL 100 Final EPA, 1993 Bromoform . PdL 100 Final EPA, 1993 2-sec-Butyl-4,6-dinitrophenol PdL 7 Final EPA, 1993 Cadmium PdL 5 Final EPA, 1993 Carbof uran PdL 40 Final EPA, 1993 Carbon tetrachloride PdL 5 Final EPA, 1993

. Chlordane PdL 2 Final EPA, 1993 Chlorobenzene PdL 100 Final EPA, 1993 Chloroethene (Vinyl chloride) PdL 2 Final EPA, 1993 Chloroform PdL 100 Final EPA, 1993 Chromium PdL 100 Final EPA, 1993 Copper Pgn- 1,300 Final EPA, 1993 Cyanide P9n- 200 Final EPA, 1993 Dalapona Pgn- 200 Final EPA, 1993 Dibromochloromethane Pgn- 100 Final EPA, 1993 1,2-Dibromo-3-chloropropane Pgn- 0.2 Final EPA, 1993 1,2-Dibromoethane Pgn- 0.05 Final EPA, 1993 1,2-DichIorobenzene PdL 600 * Final EPA, 1993 1 ,CDichlorobenzene PdL 75 Final €PA, 1993 1,2-DichIoroethane PdL 5 Final EPA,l993 ,

1,l-Dichloroethylene PdL 7 Final EPA, 1993 1,2-Dichloroethylene P a 50 Final EPA, 1993 cis-l,2-Dichloroethylene PdL 70 Final EPA, 1993 trans-l,2-Dichloroethylene PdL 100 Final EPA, 1993 Dichloromethane (Methylene chloride) pg/L 5 Final EPA, 1993 2,4-Dichlorophenoxyacetic acid PslL 70 Final EPA, 1993 1 ,BDichloropropane PdL 5 Final EPA, 1993 Di(2-ethylhewl) adipatea PdL 400 Final EPA, 1993 Diquat dibromidea PdL 20 Final EPA, 1993 Endothalla PdL 100 Final EPA, 1993 Endrin PdL 2 Final EPA, 1993 Ethylbenzene PdL 700 Final EPA, 1993 Fluoride PdL 4,000 Final EPA, 1993 Glyphosatea PdL 700 Final EPA, 1993 Gross alphab pCi/L 1.5E+01 Final EPA, 1993 Heptachlor PdL 0.4 Final EPA, 1993

PdL 4

H-Area AcicUCaustic Basin A-3 Second Quarter 1995

WSRGTR-954141-2 Unclassified

0.2 Final EPA, 1993 Final EPA, 1993 Final EPA, 1993

Heptachlor epoxide

Lead P@L 50 Final SCDHEC, 1981

Hexachlorobenzena Hexachlorocyclopentadiene

0.2 Final EPA, 1993 Final EPA, 1993

Lindane Mercury

40 Final EPA, 1993 P@L Final EPA, 1993

Nitrate as nitrogen 10,000 Final EPA, 1993

Methoxychlor Nickel

Nitriie as nitrogen . p@L P@L 1.000 Final EPA, 1993 Nonvolatile beta pCiL 5E+01 Interim Final EPA, 1977 Oxamyla P9JL 200 Final EPA, 1993 . PCB 1016 P9JL 0.5 Final EPA, 1993 PCB 1221 P@L 0.5 Final EPA, 1993 PCB 1232 P@L 0.5 Final EPA, 1993 PCB 1242 P@L 0.5 Final EPA, 1993 PCB 1248 PgJL 0.5 Final EPA, 1993 PCB 1254 P@L 0.5 Final - EPA, 1993 PCB 1260 P@ 0.5 Final EPA, 1993 PCB 1262 clsn 0.5 Final EPA, 1993 Pentachlorophenol P@L 1 Final EPA, 1993

500 Final €PA, 1993 Final EPA, 1993 Final EPA, 1993

Piclorama

Strontium-89/90c p c i i Final EPA, 1993

Selenium Simazinea

Strontium-90 pCi/L 8E+00 Final ' EPA, 1993 Styrene 100 Final EPA, 1993

0.00003 Final EPA, 1993 Final EPA, 1993 Final EPA, 1993

~ Toluene P@L 1,000 Final EPA, 1993

Tetrachloroethylene Thallium

3 Final EPA, 1993 Final EPA, 1993 Final EPA, 1993

Ps/L 50 Toxaphene

Final EPA, 1993

p@L 70

2,4,5-TP (Silvex)

Final EPb, 1993 200

1,2,4-TrichIorobenzene

Trichloroethylene F@ 5 Final EPA, 1993

1,l ,I-Trichloroethane 1,1,2-TrichIoroethane

Tritium pCiimL 2E+01 Final EPA, 1993 Xylenes PLs/L 10,000 Final EPA, 1993

P*

WL 100

\ Nitrate-nitrite as nitrogen 10,000 Final EPA, 1993

2,3,7;8-TCDD

P@L

P@

Note: Final PDWS were assigned to alachlor, aldicarb, aldicarb sulfone, aldicarb sulfoxide, atrazine, carbofuran, dalapon, di(2-ethylhexyl) adipate, diquat dibromide, endothall, glyphosate, oxamyl, picloram, and simazine in the SRS Groundwater Monitoring Program for the first time beginning first quarter 1994.

'

a At present, EMS does not perform this analysis because the constituent is not in the current contract. The standard given is for gross alpha including radium-226 but excluding radon and uranium. For double radionuclide analyses where each separate radionuclide has its own standard, the more stringent standard is used.

H-Area AcidCaustic Basin A-4 Second Quarter 1995

,

WSRGTR-954141-2 Unclassified

References

EPA (U.S. Environmental Protection Agency), 1977. National Interim Primary Drinking Water Regulations, EPA-570/9-76-003. Washington, DC.

EPA (U.S. Environmental Protection Agency), 1993. National Primary Drinking Water Regulations, Code of Federal Regulations, Title 40, Part 141, pp. 592-732. Washington, DC.

SCDHEC (South Carolina Department of Health and Environmental Control), 1981. State Primary Drinking Water Regulations, R.61-58.5. Columbia, SC.

H-Area AcicUCaustic Basin A-5 Second Quarter 1995

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A-6

I .

WSRC-TR-95-07 41-2 Unclassified

Flagging Criteria

The Savannah River Site Environmental Protection Departmeht/Environmental Monitoring Section (EPD/EMS) flagging criteria are as follows:

Flag 2 criteria for constituents equal the Safe Drinking Water Act (SDWA) final Primary Drinking Water Standards (PDWS), the SDWA proposed PDWS, or the SDWA Secondary Drinking Water Standards (SDWS). If a constituent does not have a drinking water standard, the Flag 2 criterion equals 10 times the method detection limit (MDL) calculated as the 90th percentile detection limit obtained recently by one of the primary analytical laboratories.

Flag 1 criteria for constituents equal one-half of the final PDWS, one-half the proposed PDWS, or oneLhalf the SDWS. If a constituent does not have a drinking water standard, the Flag 1 criterion equals 5 times the MDL calculated as the 90th percentile detection limit obtained recently by one of the primary analytical laboratories.

Flag 0 criteria are assigned to constituent levels below Flag 1 criteria, constituent levels below the sample detection limits, or constituents having no flagging criteria.

The following parameters are exceptions to the flagging rules:

EPD/EMS sets flagging criteria for pH and specific conductance. No flags are set for alkalinity, calcium, carbonate, magnesium, potassium, silica, sodium, total dissolved solids, total phosphates (as P), and total phosphorus. Analyses for these parameters are conducted as part of the biennial comprehensive analyses or by special request.

Aesthetic parameters such as color, corrosivity, Eh, odor, surfactants, and turbidity are not assigned flagging criteria but are analyzed by special request.

Common laboratory contaminants and cleaners such as dichloromethane (methylene chloride), ketones, phthalates, and toluene are not assigned flagging criteria unless they have primary drinking water standards. These constituents are analyzed by special request.

Analvte Unit Flaa 1 Flaa2 Sourcea

Acenaphthene PdL 50 100 €PA Method 8270 Acenaphthylene PdL 50 100 EPA Method 8270 Acetone yg/L 500 1,000 EPA Method 8240 Acetonitrile (Methyl cyanide) pg/L 500 1,000 EPA Method 8240 Acetophenone PdL 50 1 00 EPA Method 8270 2-Acetylaminofluorene . pglL 50 100 EPA Method 8270 Acrolein pg/L 100 200 EPA Method 8240 Acrylonitrile P@ 100 200 EPA Method 8240 Actinium-228 pCi/L 1.64E+03 3.27E+03 Proposed PDWS (EPA, 1991) Alachlor PdL 1 2 Final PDWS (EPA, 1993a) Aldicarbb P* 1.5 3 Final PDWS (EPA, 1993a) Aldicarb sulfoneb PdL 1 2 Final PDWS (EPA, 1993a) ' Aldicarb sulfoxideb PdL 2 4 Final PDWS (EPA, 1993a) Aldrin pg/L 0.25 0.5 EPA Method 8080 Alkalinity (as CaCO,) No flag No flag Set by EPDIEMS Allyl chloride pg/L 250 500 EPA Method 8240 Aluminum Pg/L 25 50 SDWS (EPA, 1993b) Aluminum, dissolved PdL 25 50 SDWS (EPA, 1993b) Aluminum, total recoverable Pg/L 25 50 SDWS (EPA, 1993b)

H-Area AciNCaustic Basin B-3 Second Quarter 1995

Americium-241 pC/L 3.1 7E+00 6.34E+00 Americium-243 p c i i 3.19E+00 6.37E+00 4-Aminobiphenyl Pg/L 50 100 Ammonia pg/L 500 1,000 Ammonia nitrogen pg/L 500 1,000 Aniline P& 50 100 Anthracene Pg/L 50 100

Antimony, total recoverable ', Pg/L 3

Aramite PdL 50 100

Antimony P a 3 6 Pg/L 3 6

6 Antimony, dissolved

Antimony-1 25 pCiiL 1.5E+02 3E+O2

Arsenic P f l 25 50 Arsenic, dissolved P f l 25 50 Arsenic, total recoverable Pg/L 25 50 Asbestos Fibers/L 3,500,000 7,000,000 Atrazine pg/L 1.5 Azobenzene Pg/L 50 Barium pg/L 1,000 Barium, dissolved pg/L 1,000 Barium, total recoverable pg/L 1,000 Barium-1 40c pCVL 4.5E+01 Benzene pg/L 2.5 alpha-Benzene hexachloride pg/L 0.25 beta-Benzene hexachloride kg/L 0.25 delta-Benzene hexachloride pg/L 0.25 Benzidine pg/L 250 Benzo[a]anthracene pglL 0.05 Benzo[b]fluoranthene pg/L 0.1 Benzo[ yf luorant hene pg/L 0.1

Benzo[g, h, r ] pery lene Pg/L 50 Benzo[a]pyrene pg/L 0.1 1 +Benzoquinone Pg/L 50 Benzyl alcohol PdL 50 Beryllium Pg/L 2 Beryllium, dissolved Ps/L 2 Beryllium, total recoverable PdL 2

Bis(2-chloroethoxy) methane Pg/L 50 Bis(2-chloroethyl) ether PglL 50 Bis(2-chloroisopropyI) ether PdL 50 Bis(chloromethy1) ether Pg/L 50 Bis(2-ethylhexyl) phthalate Pg/L 3

Benzoic acid pg/L 250

Beryllium-7 pCiL 3E+03

Bismuth-21 4 pCiL 9.4E+03 Boron pg/L 150 Boron, dissolved pg/L 150 Boron, total recoverable pg/L 150 Bromide pglL 5,000 Bromodichloromethane Pg/L 50 Bromoform Pg/L 50

4-Bromophenyl phenyl ether Pg/L 50

2-sec-Butyl-4,bdinitrophenol P f l 3.5

Bromomethane (Methyl bromide) pg/L 5

Butylbenzyl phthalate No flag

/

H-Area AciWCausfic Basin 8-4

3 100 2,000 2,000 2,000 9E+01 5 0.5 '0.5 0.5 500 0.1 ' 0.2 0.2 500 100 0.2 100 100 4 4 4 6E+03 100 100 100 100 6 1.89E+04 300 300 300 10,000 100 100 10 100 No flag 7

WSRGTR-954141-2 *

Unclassified

Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) EPA Method 8270 APHA Method 41 78 EPA Method 350.1 EPA Method 8270 EPA Method 8270 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Interim Final PDWS (EPA, 1977) EPA Method 8270 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) EPA Method 625 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Interim Final PDWS (EPA, 1977) Final PDWS (EPA, 1993a) EPA Method 8080 EPA Method 8080 EPA Method 8080 EPA Method 8270 Proposed PDWS (EPA, 1990) Proposed PDWS (EPA, 1990) Proposed PDWS (EPA, 1990) EPA Method 8270 EPA Method 8270 Final PDWS (EPA, 1993a) EPA Method 8270 EPA Method 8270 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Interim Final PDWS (EPA, 1977) EPA Method 8270 EPA Method 8270 EPA Method 8270 EPA Method 8270 Final PDWS (EPA, 1993a) Proposed PDWS (EPA,' 1991) EPA Method 601 0 EPA Method 601 0 EPA Method 601 0 EPA Method 300.0 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) EPA Method 8240 EPA Method 8270 Set by EPD/EMS Final PDWS (EPA, 1993a)

Second Quarter 1995

WSRCTR-95-0141-2 Unclassified

Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) FinaiPDWS (EPA, 1993a) Set by EPDEMS Set by EPD/EMS Set by EPD/EMS Final PDWS (EPA, 1993a) Interim Final PDWS (EPA, 1977) Set by EPD/EMS EPA Method 8240 Final PDWS (EPA, 1993a) Interim Fimal PDWS (EPA, 1977) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Interim Final PDWS (EPA, 1977) Final PDWS (EPA, 1993a) SDWS (EPA, 1993b) EPA Method 8270 Final PDWS (EPA, 1993a) EPA Method 8270 EPA Method 8270 EPA Method 8240 Final PDWS (EPA, 1993a) EPA Method 8240 EPA Method 8240 Final PDWS (EPA, 1993a) EPA Method 8240 EPA Method 8240 EPA Method 8270 EPA Method 8270 EPA Method 8240 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Interim Final PDWS (EPA, 1977) Proposed PDWS (EPA, 1990) EPA Method 601 0 EPA Method 601 0 EPA Method 601 0 Interim Final PDWS (EPA, 1977) Interim Final PDWS (EPA, 1977) Interim Final PDWS (EPA, 1977) Set by EPD/EMS Final PDWS (SCDHEC, 1981) Final PDWS (SCDHEC, 1981) Final PDWS (SCDHEC, 1981) Set by EPDEMS EPA Method 8270 EPA Method 8270 EPA Method 8270 Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991)

Second Quarfer 1995

\

Curium-246 pCi/L 3.14E+00 6.27E+00 Cyanide pglL 100 200 Dalaponb pglL 100 200 p,p’-DDD pgJL 0.5 1 p,p’-DDE pg/L 0.5 1 p,p’-DDT ps/L 0.5 1 Diallate PdL 50 100

Dibenzof uran PdL 50 100 Dibromochloromethane PdL 50 100 1.2-Dibromo-3-chloropropane pg/L . 0.1 0.2

Dibromomethane P s n 5 10

Dibenz[a,h]anthracene - pglL 0.15 0.3

1,2-Dibromoethane pgA 0.025 0.05

(Methylene bromide) Di-n-butyl phthalate No flag No flag 1,2-DichIorobenzene Psn 300 600 1,3-Dichlorobenzene PdL 50 100 - 1,4-Dichlorobenzene pgiL 37.5 75 3,3‘-Dichlorobenzidine P* 50 ’ 100

Dichlorodifluoromethane , Psn 5 10 1,1 -Dichloroethane PLsn 5 10 1,2-Dichloroethane Psn 2.5 5 1,l -Dichloroethylene Psn 3.5 7

trans-l,2-Dichloroethylene P s n 50 100 Dichloromethane ps/L 2.5 5

2,4-Dichlorophenol PdL 50 100 2,b-Dichlorophenol PdL 50 100

1.2-Dichloropropane pglL 2.5 5 cis-1 ,3-Dichloropropene PLsn 5 10 trans-l,3-Dichloropropene PdL 5 10 Dieldrin ps/L 2.5 5

Dimethoate PdL 50 100 p-Dimethylaminoazobenzene PdL 50 100 p(Dimethy1amino)ethylbenzene pg/L 50 . 100 7,12-Dimethylbenz[a]anthracene pg/L 50 100 3,3’-Dimethylbenzidine PdL 50 100 a,a-Dimethylphenethylamine PdL 50 100 2,4-Dimethyl phenol P a 50 100

1,3-Dinitrobenzene PdL 50 1 00

2,CDinitrotoluene Pgn- 50 1 00 2,6-Dinitrotoluene PdL 50 100

1 ,&Dioxane PdL 50 100 Diphenylamine PdL 50 100 1,2-Diphenylhydrazine PdL 50 100 Diquat dibromideb PdL 10 20

trans-l,4-Dichloro-2-butene Psn 150 300

1,2-Dichloroethylene P s n 25 50 cis-1.2-Dichloroethylene P s n 35 70

(Methylene chloride)

2,CDichlorophenoxyacetic acid PdL 35 70

Di(2-ethylhexyl) adipate P* 200 400 Diethyl phthalate No flag No flag

Dimethyl phthalate No flag No flag

2,CDinitrophenol yg/L 250 500

Di-n-octyl phthalate No flag No flag

H-Area AcicVCaustic Basin B-6

WSRGTR-95-0141-2 Unclassified

Proposed PDWS (EPA, 1991) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) EPA Method 8080 EPA Method 8080 EPA Method 8080 EPA Method 8270 Proposed PDWS (EPA, 1990) EPA Method 8270 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) EPA Method 8240

Set by EPD/EMS Final PDWS (EPA, 1993a) EPA Method 8270 Final PDWS (EPA, ,1993a) EPA Method 8270 EPA Method 8240 EPA Method 8240 EPA Method 8240 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a)

EPA Method 8270 EPA Method 8270 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) EPA Method 8240 €PA Method 8240 EPA Method 8080 Final PDWS (EPA, 1993a) Set by EPD/EMS EPA Method 8270 EPA Method 8270 EPA Method 8270 EPA Method 8270 EPA Method 8270 EPA Method 8270 EPA Method 8270 Set by EPDEMS EPA Method 8270 EPA Method 8270 EPA Method 8270 EPA Method 8270 Set by EPD/EMS EPA Method 8270 EPA Method 8270 EPA Method 8270 Final PDWS (EPA, 1993a)

Second Quarter 1995

Dissolved organic carbon Disulfoton Eh Endosulfan I Endosulfan I1 Endosulfan sulfate Endothallb Endrin Endrin aldehyde Endrin ketone Ethylbenzene Ethyl methacrylate ' Ethyl methanesulfonate Europium-1 52 Europium-1 54 Europium-I 55 Famphur Fluoranthene Fluorene Fluoride Glyphosateb Gross alpha Heptachlor Heptachlor epoxide Heptachlorodibenzo-p-dioxin isomers 1,2,3,4,6,7,8HPCDD Heptachlorodibenzo-p-furan isomers

Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachlorodibenzo-p-dioxin isomers

Hexachlorodibenzo-p-furan isomers

Hexachloroethane Hexachlorophene Hexachloropropene

1,2,3,4,6,7,8-HPCDF

1,2,3,4,7,8-HXCDD

1,2,3,4,7,8-HXCDF

2-Hexanone Indeno[l,2,3-~,4pyrene Iodine Iodine-1 29 Iodine-1 3 lC lodomethane (Methyl iodide) Iron Iron, dissolved Iron, total recoverable lr0n-55~ Iron-55 Isobutyl alcohol lsodrin

I

H-Area AcicUCaustic Basin

pg/L 5,000 Yg/L 50

No flag pg/L 0.5 pglL 0.5 pg/L 0.5

50

pglL 0.5

pg/L 350

Pg/L 1

No flag

PdL 50 Pg/L 50 pCVL 3E+01 pCVL 1E+02 pCVL 3E+02 Ptg/L 50 Pg/L 50 Pg/L 50 pglL 2,000

pg/L 0.2 pg/L 0.1

pg/L 350 pCUL 7.5E+00

pg/L 0.00325

pg/L 0.00325 pg/L 0.00225

pg/L 0.00225 pg/L 0.5 PglL 50 Pg/L 25 pg/L 0.00225

pg/L 0.00225 pg/L 0.002

pg/L 0.002 Pg/L 50 pglL 250 PglL 50 Pg/L 50 Pg/L 50 pg/L 250

pCVL 1.5E+00

pglL 150 pglL 150 pg/L 150 pCVL 1E+03 pCVL 1E+02 pg/L 500

PCVL 5E-01

Ps/L 75

Pg/L 50

B-7

10,000 100 No flag 1 1 1 100 2 1 No flag 700 100 100 6E+01 2E+02 . 6E+02 100 100 100 4,000 700 1.5E+01 0.4 0.2 0.0065

0.0065 0.0045

0.0045 1 100 50 0.0045

0.0045 0.004

0.004 100 500 100 100 100 500 1 E+OO 3E+00 1 50 300 300 300 2E+03 2E+02 1,000 100

WSRC-TR-95-0141-2 Unclassified

EPA Method 9060 EPA Method 8270 Set by EPD/EMS EPA Method 8080 EPA Method 8080 EPA Method 8080 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) EPA Method 8080 Set by EPD/EMS Final PDWS (EPA, 1993a) EPA Method 8270 EPA Method 8270 Interim Final PDWS (EPA, 1977) Interim Final PDWS (EPA, 1977) Interim Final PDWS (EPA, 1977) EPA Method 8270 EPA Method 8270 EPA Method 8270 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) EPA Method 8280

EPA Method 8280 EPA Method 8280

EPA Method 8280 Final PDWS (EPA, 1993a) EPA Method 8270 Final PDWS (EPA, 1993a) EPA Method 8280

EPA Method 8280 EPA Method 8280

EPA Method 8280 EPA Method 8270 EPA Method 8270 EPA Method 8270 EPA Method 8240 EPA Method 8270 APHA Method 41 5A Interim Final PDWS (EPA, 1977) Interim Final PDWS (EPA, 1977) EPA Method 8240 SDWS (EPA, 1993b) SDWS (EPA, 1993b) SDWS (EPA, 1993b) Interim Final PDWS (EPA, 1977) Interim Final PDWS (EPA, 1977) EPA Method 8240 EPA Method 8270

Second Quarter 1995

WSRGTR-95-0141-2 ' Unclassified

lsophorone Pg/L 50 100 EPA Method 8270 lsosafrole PdL 50 100 EPA Method 8270 Kepone . Pg/L 50 100 EPA Method 8270 Lanthanum-140c pCdL 3E+01 6E+01 Interim Final PDWS (EPA, 1977) Lead P@L 25 50 Final PDWS (SCDHEC, 1981) Lead, dissolved PSiL 25 50 Final PDWS (SCDHEC, 1981) Lead, total recoverable P S n 25 50 Final PDWS (SCDHEC, 1981) Lead-21 2 pCdL 6.2E+01 1.23E+02 Proposed PDWS (EPA, 1991) Lindane Pg/L 0.1 0.2 Final PDWS (EPA, 1993a) Lithium P@- I 25 50 EPA Method 601 0 Lithium, dissolved P@L 25 50 EPA Method 6010 Lithium, total recoverable I Ps/L 25 50 EPA Method 601 0 Magnesium Noflag Noflag Set by EPDIEMS Magnesium, dissolved Noflag Noflag Set by EPD/EMS Magnesium, total recoverable No flag No flag Set by EPD/EMS Manganese P@L 25 50 SDWS (EPA, 1993b) Manganese, dissolved P@L 25 50 SDWS (EPA, 199313) Manganese, total recoverable P@L 25 50 SDWS (EPA, 1993b) Manganese-54 pCiR 1.5E+02 3E+02 Interim Final PDWS (EPA, 1977) Mercury Pg/L 1 2 Final PDWS (EPA, 1993a) Mercury, dissolved Pg/L 1 2 Final PDWS (EPA, 1993a) Mercury, total recoverable Pg/L 1 2 Final PDWS (EPA, 1993a) Methacrylgnitrile pg/L 250 500 EPA Method 8240 Methapyrilene Pg/L 50 100 EPA Method 8270 Methoxychlor Pg/L 20 40 Final PDWS (EPA, 1993a) 3-Methylcholanthrene Pg/L 50 100 EPA Method 8270 2-Methyl4,6-dinitrophenol pg/L 250 500 EPA Method 8270 Methyl ethyl ketone No flag No flag Set by EPD/EMS Methyl isobutyl ketone No flag No flag Set by EPD/EMS Methyl methacrylate PW 50 100 EPA Method 8270 Methyl methanesulfonate Pg/L 50 100 EPA Method 8270 2-Methylnaphthalene Pg/L 50 100 EPA Method 8270 Molybdenum pgIL 250 500 EPA Method 601 0 Molybdenum, dissolved pg/L 250 500 EPA Method 601 0 Molybdenum, total recoverable pg/L 250 500 EPA Method 601 0 Naphthalene Pg/L 50 100 EPA Method 8270 1 +Naphthoquinone Pg/L 50 100 EPA Method 8270 1 -Naphthylamine CLS/L 50 100 EPA Method 8270 2-Naphthylamine 50 100 EPA Method 8270 Neptunium-237 pCdL 3.53E+00 7.06E+00 Proposed PDWS (EPA, 1991) Nickel PdL 50 100 Final PDWS (EPA, 1993a) Nickel, dissolved Pg/L 50 100 Final PDWS (EPA, 1993a) Nickel, total recoverable PSn 50 100 Final PDWS (EPA, 1993a) Nickel-5gc pCi/L 1.5E+02 3E+02 Interim Final PDWS (EPA, 1977) Nickel-63c pCdL 2.5E+01 5€+01 Interim Final PDWS (EPA, 1977) Niobium-95c pCiR 1.5E+02 3.E+02 Interim Final'PDWS (EPA, 1977) Nitrate as nitrogen PS/L 5,000 10,000 . Final PDWS (EPA, 1993a) Nitrate-nitrite as nitrogen pg/L 5,000 10,000 Final PDWS (EPA, 1993a) Nitrite as nitrogen pg/L 500 1,000 Final PDWS (EPA, 1993a) m-Nitroaniline pg/L ' 50 1 00 EPA Method 8270 o-Nitroaniline Pg/L 50 100 EPA Method 8270 p-Nitroaniline PS/L 50 100 EPA Method 8270 Nitrobenzene P ~ / L 50 100 EPA Method 8270 Nitrogen by Kjeldahl method pg/L 500 1,000 EPA Method 351.2 2-Nitrophenol Pg/L 50 100 EPA Method 8270

H-Area AciWGaustic Basin 6-8 Second Quarter 1995

WSRC-TR-954141-2 Unclassified

4-Nitrophenot P W 50 100 EPA Method 8270 CNitroquinoline-1 -oxide Pg/L 50 100 EPA Method 8270 N-Nitrosodi-n-butylamine P a 50 100 EPA Method 8270 N-Nitrosodiethylamine Pg/L 50 100 EPA Method 8270 N-Nitrosodimethylamine Pg/L 50 . . l oo EPA Method 8270 N-Nitrosodiphenylamine Pg/L 50 100 EPA Method 8270 N-Nitrosodipropylamine Pg/L 50 1 OQ EPA Method 8270 N-Nitrosomethylethylamine P a 50 100 EPA Method 8270 N-Nitrosomorphoiine Pg/L 50 100 EPA Method 8270 N-Nitrosopipendine Pg/L 50 100 EPA Method 8279 N-Nitrosopyrrolidine Pg/L 50 100 EPA Method 8270 5-Nitro-0-toluidine Pg/L 50 100 EPA Method 8270 Nonvolatile beta pCiL 2.5E+01 5E+01 Interim Final PDWS (EPA, 1977) . Octachlorodibenzo-pdioxin pg/L 0.005 0.01 EPA Method 8280 isomers Octachlorodibenzo-p-furan pg/L 0.005 0.01 EPA Method 8280 isomers Odor No flag No flag Set by EPD/EMS Oil & Grease P@ 5,000 10,000 EPA Method 413.1 OxamyP Pg/L 100 200 Final PDWS (EPA, 1993a) Parathion pglL 0.25 0.5 EPA Method 8080 Parathion methyl pg/L 0.25 0.5 EPA Method 8080 PCB 1016 p@ 0.25 0.5 Final PDWS (EPA, 1993a) PCB 1221 pg/L 0.25 0.5 Final PDWS (EPA, 1993a) PCB 1232 pg/L 0.25 0.5 Final PDWS (EPA, 1993a) PCB 1242 pg/L 0.25 0.5 Final PDWS (EPA, 1993a) PCB 1248 pg/L 0.25 0.5 Final PDWS (EPA, 1993a) PCB1254 . pg/L 0.25 0.5 Final PDWS (EPA, 1993a) PCB 1260 pg/L 0.25 0.5 Final PDWS (EPA, 1993a) PCB 1262 pg/L 0.25 0.5 ~ Final PDWS (EPA, 1993a) Pentachlorobenzene Pg/L 50 100 EPA Method 8270 Pentachlorodibenzo-p-dioxin pg/L 9.00275 0.0055 EPA Method 8280 isomers 1,2,3,7,8-PCDD pg/L 0.00275 0.0055 EPA Method 8280 Pentachlorodibenzo-p-furan pg/L 0.00275 0.0055 EPA Method 8280 isomers 1,2,3,7,8-PCDF pg/L 0.00275 0.0055 EPA Method 8280 Pdntachloroethane Pg/L 50 100 EPA Method 8270 Pentachloronitrobenzene 100 EPA Method 8270 Pentachlorophenol 1 Final PDWS (EPA, 1993a) PH PH 8 10 Set by EPD/EMS PH PH 4 3 Set by EPD/EMS Phenacetin Pg/L 50 100 EPA Method 8270 Phenanthrene Pg/L 50 100 EPA Method 8270 Phenol Pg/L 50 1 00 EPA Method 8270 Phenols Pg/L 25 50 EPA Method 420.1 p- Phenylenediamine Pg/L 50 100 EPA Method 8270 Phorate @L 0.5 1 EPA Method 8080 Picloramb pg/L 250 500 Final PDWS (EPA, 1993a) 2-Picoline P W 50 100 EPA Method 8270 Plutonium-238 pCi/L 3.51E+OO 7.02E+00 Proposed PDWS (EPA, 1991) Plutonium-239 pCi/L 3.1 1 E+01 6.21 E+01 Proposed PDWS (EPA, 1991) PIutonium-239/24Oe pCi/L 3.1 1 E+Ol 6.21E+01 ‘Proposed PDWS (EPA, 1991) Plutonium-240 pCiL 3.1 1 E+01 6.22E+01 Proposed PDWS (EPA, 1991)

, Plutonium-241 C pCiL 3.13E+01 6.26E+Q1 Proposed PDWS (EPA, 1991)

H-Area AcWCaustic Basin 6-9 Second Quarter 1995

Plutonium-242c Potassium Potassium, dissolved Potassium, total recoverable Potassium-40 Promethium-1 44 Promethium-1 46 Promethium-1 47 Pronamid Propionitrile Pyrene Pyridine Radium (alpha-emitting)f Radium-226 Radium-228 Radon-222 Ruthenium-1 03c Ruthenium-1 06 Safrole Selenium Selenium, dissolved Selenium, total recoverable Silica Silica, dissolved Silica, total recoverable Silver Silver, dissolved Silver, total recoverable Simazineb Sodium Sodium, dissolved Sodium, total recoverable Sodium-22 Specific conductance Strontium-89 Strontium-89/90e Strontium-90 Styrene Sulfate Sulfide Sulfotepp Surfactants 2,3,7,8-TCDD 2,3,7,8-TCDF Technetium-99 1,2,4,5-Tetrachlorobenzene Tetrachlorodibenzo-p-dioxin isomers Tetrachlorodibenzo-p-furan isomers 1,1,1,2-TetrachIoroethane 1,1,2,2-TetrachIoroethane Tetrachloroethylene 2,3,4,6-Tetrachlorophenol Thallium Thallium, dissolved

H-Area AcicUCaustic Basin

pCi/L 3.27E+O1 6.54E+01 No flag No flag No flag No flag No flag No flag

p C i 1.5E+02 3E+02 pCi/L 5E+01 1 E+02 pCiL 5E+01 1 E+02 pC/L 2.62E+03 5.24E+03 P f l 50 100 PgR 1,000 2,000 PS/L 50 100 PS/L 50 100 pCi/L 1E+01 2E+01 pCi/L 1E+01 2E+01 pCi/L 1E+01 2E+01 pWL 1.5E+02 3E+02 pCi/L 1E+02 2E+02 pCi/L 1.5E+01 3E+01

P9/L 25 50 PS/L 25 50 PS/L 25 50

PS/L 50 100

No flag No flag No flag No flag No flag No flag

PS/L 50 100 PdL 50 ' 100 P9/L 50 100 PS/L 2 4

No flag No flag No flag No flag No flag No flag

pCiL 2.33E+02 4.66E+02 pS/cm 250 500 pCi/L 1E+01 2E+01 pCVL 4E+00 8E+00 pCiR 4E+00 8E+00

pg/L 200,000 400,000 PS/L 50 100

pS/L 5,000 10,000 PS/L 50 100

No flag No flag pS/L 0.000015 0.00003 ' PS/L 0.002 0.004 pCiR 4.5E+02 9E+02

pg/L 0.00225 0.0045

pg/L 0.002 0.004

PS/L 50 100

PdL 5 10 PdL 5 10 pg/L 2.5 5 PS/L 50 100 PdL 1 2 PdL 1 2

B-10

' WSRC-TR-95-0147-2 Unclassified

Proposed PDWS (EPA, 1991) Set by EPD/EMS Set by EPD/EMS Set by EPD/EMS Proposed PDWS (EPA, 1986) EPA Method 901.1 EPA Method 901.1 Proposed PDWS (EPA, 1991) EPA Method 8270 EPA Method 8240 EPA Method 8270 EPA Method 8270 Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Interim Final PDWS (EPA, 1977) Interim Final PDWS (EPA, 1977) EPA Method 8270 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Set by EPD/EMS Set by EPD/EMS Set by EPD/EMS SDWS (EPA, 1993b) SDWS (EPA, 1993b) SDWS (EPA, 1993b) ' Final PDWS (EPA, 1993a) Set by EPD/EMS Set by EPD/EMS Set by EPDIEMS Proposed PDWS (EPA, 1991) Set by EPD/EMS Interim Final PDWS (EPA, 1977) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Proposed PDWS (EPA, 1990) EPA Method 9030 EPA Method 8270 Set by EPD/EMS Final PDWS (EPA, 1993a) EPA Method 8280 Interim Final PDWS (EPA, 1977) EPA Method 8270 EPA Method 8280

EPA Method 8280

EPA Method 8240 EPA Method 8240 Final PDWS (EPA, 1993a) EPA Method 8270 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a)

Second Quarter 1995

Thallium, total recoverable Pg/L 1 2 Thionazin Pg/L 50 -100 Thorium;228 pCVL 6.25E+01 1.25E+02 Thorium-230 pCi/L 3.96Ei-01 7.92E+01 Thorium-232 pCi/L 4.4E+01 8.8E+01 Thorium-234 pCi/L 2E+02 4.01 Ei02 Tin P!N- 10 20 Tin, dissolved Pg/L 10 20 Tin, total recoverable PdL 10 20

Toluene pg/L 500 1,000 o-Toluidine Pg/L 50 100 Total carbon pg/L 5,000 10,000 Total coliform 0 0 Total dissolved solids No flag No flag Total hydrocarbons pg/L 5,000 10,000 Total inorganic carbon pg/L 5,000 10,000 Total organic carbon pg/L 5,000 10,000

Total organic nitrogen pg/L 500 1,000 Total petroleum hydrocarbons pg/L 5,000 10,000

Toxaphene pg/L 1.5 3

Tributyl phosphate Pg/L 50 100

1 ,1 ,1-Trichloroethane pg/L 100 200 1,1,2-TrichIoroethane pg/L 2.5 5 Trichloroethylene pg/L 2.5 5

Tin-1 1 3c pCi/L 1.5E+02 3E+02

Total organic halogens pg/L 25 50

Total phosphates (as P) No flag No flag Total phosphorus No flag No flag

2,4,5-TP (Siltex) Pg/L 25 50

1,2,4-Trichlorobenzene P* 35 70

Trichlorof luoromethane Pi* 5 10 2,4,5-TrichlorophenoI PdL 50 100 2,4,6-TrichlorophenoI P* 50 100 2,4,5-Trichlorophenoxyacetic acid pg/L 2.5 5 1,2,3-TrichIoropropane Pg/L 5 10 O,O,O-Triethyl phosphorothioate pg/L 50 1 00

I 1,3,5-Trinitrobenzene PglL 50 100

Uranium P* 10 20 Uranium, dissolved P@ 10 20 Uranium, total recoverable Fg/L 10 20

Tritium pCiimL 1E+01 2E+01 Turbidityg No flag No flag

Uranium alpha activity pCiL 1.5Ei01 3E+01 Urani~m-233234~ pCiR 6.9E+00 1.38E+01 Uranium-234 pCiL 6.95E+00 I .39Ei01 Uranium-235 pCi/L 7.25E+00 1.45E+01 Uranium-238 pCi& 7.3E+00 1.46Ei01 Vanadium Pg/L 40 80 Vanadium, dissolved Pg/L 40 80 Vanadium, total recoverable Pg/L 40 . 80 Vinyl acetate Pg/L 5 10 Xylenes pg/L 5,000 10,000 Yttrium-88 pCiL 5E+01 1 E+02 Zinc pg/L 2,500 5,000 Zinc, dissolved pg/L 2,500 5,000

H-Area AciNCaustic Basin 6-1 1

WSRGTR-954141-2 Unclassified

Final PDWS (EPA, 1993a) EPA Method 8270 Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) EPA Method 282.2 EPA Method 282.2 EPA Method 282.2 Interim Final PDWS (EPA, 1977) Final PDWS (EPA, 1993a) EPA Method 8270 EPA Method 9060 Final PDWS (EPA, 1993a) Set by EPD/EMS EPA Method 41 8.1 EPA Method 9060 EPA Method 9060 EPA Method 9020 APHA Method 420 EPA Method 418.1 Set by EPD/EMS Set by EPD/EMS Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) EPA Method 8270 Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) Final PDWS (EPA, 1993a) EPA Method 8240 EPA Method 8270 EPA Method 8270 EPA Method 8150 EPA Method 8240 EPA Method 8270 EPA Method 8270 Final PDWS (€PA, 1993a) Set by EPD/EMS Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) Proposed PDWS (EPA, 1991) EPA Method 6010 EPA Method 6010 EPA Method 601 0 EPA Method 8240 Final PDWS (EPA, 1993a) EPA Method 901.1 SDWS (EPA, 1993b) SDWS (EPA, 1993b)

Second Quarter 1995

WSRC-TR-95-0147-2 '

Unclassified

Zinc, total recoverable pglL 2,500 5,000 SDWS (EPA, 199313) Zinc-65 pCi/L 1.5E+02 3E+02 Interim Final PDWS (EPA, 1977) Zirconium-9sc pCVL 1E+02 2E+02 Interim Final PDWS (€PA, 1977) Zirconi~m/Niobium-95~ pCi/L 1E+02 2E+02 Interim Final PDWS (EPA, 1977)

a References for methods are in Appendix E; references for dated sources are at the end of this appendix. EMS is currently unable to perform this analysis. EMS discontinued monitoring this radionuclide because it is inappropriate for the SRS Groundwater Monitoring Program. EPD/EMS set this flagging criterion using the 1991 proposed PDWS because the final PDWS in 1977 may have been in error.

more stringent standard is used. The applied standard is for radium-226.

the SRS Groundwater Monitoring Program.

e For double radionuclide analyses where each separate radionuclide has its own standard, the

9 The primary maximum contaminant level range for turbidity is 1-5 NTU, which is inappropriate for

References

EPA (U.S. Environmental Protection Agency), 1977. National Interim Primary Drinking Water Regulations, EPA-570/9-76-003. Washington, DC.

EPA (U.S. Environmental Protection Agency), 1986. Wafer Pollution Control; National Primary Drinking Water Regulations, Radionuclides (Proposed). Federal Register, September 30, 1 986, pp. 3483534862. Washington, DC.

EPA (U.S. Environmental Protection Agency), 1990. National Primary and Secondary Drinking Water Regulations; Synthetic Organic Chemicals and lnorganic Chemicals (Proposed Rule). Federal Register, July 25, 1990, pp. 30369-30448. Washington, DC.

EPA (U.S. Environmental Protection Agency), 1991. National Primary Drinking Wafer Regulations; Radionuclides; Proposed R DC.

EPA (US. Environmental Protection Agency), 1993a. National Primary Drinking Water Regulations. Code of Federal Regulations, Title 40, Part 141, pp. 592-732. Washington, DC.

EPA (US. Environmental Protection Agency), 1993b. National Secondary Drinking Water Regulations. Code of Federal Regulations, Title 40, Part 143, pp, 774-777. Washington, DC.

SCDHEC (South Carolina Department of Health and Environmental Control), 1981. State Primary Drinking Water Regulations, R.61-58.5. Columbia, SC.

deral Register, July 18, 1991, pp. 33052-33127. Washington,

H-Area AcicVCaustic Basin B-12 Second Quarter 1995

WSRC-TR-954141-2 Unclassified

Figure 1. Location of the H-Area AcidCaustic Basin at the Savannah River Site

H-Area AciadcCaustic Basin c-3 Second Quartef 1995

Legend

M o n i t o r t n g well HAC 4

A

Acid/caustlc basin

H i g h - l e v e l radioactive wuste storage t a n k

WSRCTR-95-0141-2 Unclassified

H-Area Tank F a r m

\ \ I I Legend

HAC 4 Horizontal groundwater A f l o w direction

Monitoring well 274.5 water elevation (I t m s l )

U Acid/caustic basin

High-level radioactive waste s torage t a n k

I 200 0 200

Scale in m e t e r s H H I i

50 0 50

@ Contour interval: .5f oot

Figure 3. Piezometric Surface Map of the Water Table at the H-Area AcidlCaustic Basin

H-Area Acidcaustic Basin c-5 Second Quarter 1995

THIS PAGE LEFT BLANK INTENTIONALLY.

THIS PAGE LEFT BLANK INTENTIONALLY.

Key to Reading the Tables

The following abbreviations may appear in the data tables:

Constituents

1,2,3,4,6,7,8-HPCDD 1,2,3,4,6,7,8-HPCDF 1,2,3,4,7,8-HXCDD 1,2,3,4,7,8-HXCDF Lindane PCB 1,2,3,7,8-PCDD 1,2,3,7,8-PCDF Sp. conductance TCDD TCDF

1

Laboratories

CN EM

GE and GP sc SP TM WA and WS

Sampling Codes

B C D E I

L

P

S

x \

Sampling Methods

B P S

V

H-Area AcicUCaustic Basin

WSRGTR-95-014 1-2 Unclassified

1,2,3,4,6,7,8-heptachlorodibenzo-pdioxin 1,2,3,4,6,7,8-heptachlorodibenzo-p-furan 1,2,3,4,7,8-hexachlorodibenzo-pdioxin 1,2,3,4,7,8-hexachlorodibenzo-p-furan gamma-benzene hexachloride polychlorinated biphenyl 1,2,3,7,8-pentachlorodibenzo-p-dioxin 1,2,3,7,8-pentachlorodibenzo-p-f uran specific conductance tetrachlorodibenzo-p-dioxin tetrachlorodibenzo-p-furan

Clemson Technical Center, Inc. Environmental Protection Depattment/Environmental Monitoring Section (EPD/EMS) Laboratory General Engineering Laboratories Savannah River Technology Center Spencer Testing Services, Inc. TMNEberline Roy F. Weston, Inc.

biank sample was collected well was pumping continuously well was dry equipment blank was collected well went dry during sampling; insufficient water to collect all samples well went dry before sampling began; be determined inaccessibility or mechanical failure prevented sample, collection and field analysis of the water no water in standpipe; for water level events only well went dry during purging; samples collected after well recovered.

ly depth to water can

sample collected using an open-bucket bailer sample collected using a bladder pump sample collected using a single-speed centrifugal downhole pump sample collected using a variable-speed pump

0-3 Second Quarter 1995

WSRCTR-95-0141-2 Unclassified

Units

. E

mgk msl MSL NTU pCK pCi/mL PH P a '

pS/cm

exponential notation (e.g., 1.1 E-09 = 1.1 x 1 0-9 = 0.000000001 1) ' milligrams per liter mean sea level million structures per liter turbidity unit picocuries per liter picocuries per milliliter pH unit micrograms per liter microsiemens per centimeter

Other

cs carbon steel DF H Mod PDWS primary drinking water standard PVC polyvinyl chloride '

TOC top of casing

dilution factor column in data tables holding time column in data tables modifier column in data tables

' ST exceeded standard column in data tables

Holding Times

Standard analytical methods include a limit, called holding time, on the maximum elapsed time between sample collection and extraction or analysis by the laboratory. In the data tables, a large bullet (e) in the H (holding time) column indicates that holding time was exceeded. Analyses performed beyond holding times may not yield valid results.

The South Carolina Department of Health and Environmental Control allows only 15 minutes to elapse between sampling and analysis for pH. Thus, only field pH measurements can meet the holding time criterion; laboratory pH analyses always will exceed it.

The laboratory procedure used for the determination of specific conductance allows one day to elapse between sampling and analysis. Thus, laboratory specific conductance measurements may exceed the holding time criterion.

Data Rounding

Constituent results in analytical results tables that appear to equal the final PDWS but are not marked in the ST(exceeded the final PDWS or screening level) column are below the final PDWS in the database. Values stored in the database contain more significant digits than the reported results. Apparent discrepancies in the tables are due to the rounding of reported results.

H-Area AcitVCaustic Basin D-4 Second Quarter 1995

Data Qualification

WSRCTR-95414 1-2 Unclassified

The contract laboratories continually assess their own accuracy and precision according to U.S. Environmental Protection Agency (EPA) guidelines. They submit sample- or batch-specific quality assurance/quality control information either at the same time as analytical results or in a quarterly summary. Properly defined and used result modifiers (also referred to as qualifiers) can be a key component in assessing data usability. Result modifiers designed by the EPD/EMS and provided to the primary laboratories are defined below. These modifiers appear in the data tables under the column Mod. The lettered modifiers are based on EPA's STORET codes.

Result modifier

(Blank) Data are not qualified. Numbers should be interpreted exactly as reported.

M

R

T

U

Value is estimated because quantitation in the sample or in associated quality control samples did not meet specifications.

The value in the result field is the instrument reading, not the sample quantification limit. Always used with the result qualifier U.

Value is off-scale high. The actual value is not known but is known to be greater than the value shown.

Presence of the analyte is verified but not quantified.

Result was rejected because performance requirements in the sample analysis or associated quality control analyses were not met.

Analyte was not detected; if present, it was below the criteria for detection.

Material anafyzed for but not detected. Analytical result reported is less than the sample quantitation limit.

Analyte was detected in an associated method blank.

Result was obtained from an unpresetved or improperly preserved sample. Data may not be accurate.

Result may be an underestimation of the true value due to analytical bias.

Result may be an overestimation of the true value due to analytical bias.

The associated result may be of poor precision (high variability) due to analytieal bias.

Result is associated with QA results indicating matrix interference.

The associated result is from a reanalysis performed out of holding time due to problems with an earlier analysis.

.

H-Area AciNCaustic Basin D-5 Second Quarfer 1995

WSRGTR-95-014 1-2 Unclassified

Table 3. Groundwater Monitoring Results for Individual Wells

WELL: HAC 1

SRS Coord. LatLongitude Screen Zone Elevation TOD of Casinv Casin? Pump Formation N 72171 33.285599 Deg N 278.8-258.8 ft msl 298.4 ft msl 4" PVC S Water Table 61415.2 81.645272 Deg W 4

FELD MEASUREMENTS

. Sample date: 04/25/95 Time: 1354 Depth to water: 28.23 ft (8.607 m) below TOC Water elevation: 270.17 ft (82.37 m) msl Sp. conductance: 119 uS/cm Turbidity: 0.9 NTU Water evacuated before sampling:41 gal

pH5.3 Alkalinity:3 mg/L Water temperature: 23.2 deg C

Volumes purged: 5.497 well voIumes

LABORATORY ANALYSES

- H ST Analvte Result Mod Unit Lab

Gross alpha .9 1 J pciL 0 TM Gross alpha .8 1 J pciL 0 TM

Nonvolatile beta < 1.2 1 UI pciL 0 TM Nonvolatile beta c .6 1 UI pciL 0 TM

+ Tritium 44.79 1 pci/mL 2 Th4 + Tritium 42.16 1 pci/mL 2 TM

Nitrate as nitrogen 1610 2 ugn 0 WA

Aluminum, total recoverable 77.1 1 Jv ug/L 2 WA Arsenic, total recoverable < 12 1 U llgn 0 WA Barium, total recoverable 3.5 1 J u g n 0 WA Cadmium, total recoverable <4.7 1 U ug/L 0 WA Chromium, total recoverable c 10 1 U ugn 0 WA Iron, total recoverable 597 1 ugn 2 WA Lead, total recoverable 9.9 1 J ugn 0 WA Manganese, total recoverable 8.1 1 u g n 0 WA Mercury, total recoverable c.67 1 U ugn 0 WA Radium-226 .19 1 J pciL 0 TM Radium-226 <.15 1 UI pci/L 0 TM Radium-228 1.2 1 pci/L 0 TM Radium-228 <-.1 1 UI pCiL 0 TM Selenium, total recoverable c 19 1 U ugn 0 WA Silver, total recoverable .39 1 Jv ugn 0 WA Sodium, total recoverable 18000 1 ugn 0 WA Sulfate 29000 10 u g n 0 WA

* WA 5.15 1 Number of Records: 25

J PH 0 PH

* = exceeded holding time. + = exceeded screening level or final primary drinking water standard. .

H-Area AcidGaustic Basin 0-7 Second Quarter 1995

WSRGTR-95-014 1-2 Unclassified

WELL. HAC 2

SRS Coord. Lat/Longitude Screen Zone Elevation Too of Casing Casinp Pump Formation N 72220.2 33.285629 Deg N 278.8-258.8 ft msl 298.1 ft msl 4" PVC S Water Table

' 61366.9 81.645495 Deg W

FIELD MEASUREMENTS

Sample date: 04/25/95 Depth to water: 28.47 ft (8.680 m) below TOC Water elevation: 269.63 ft (82.20 m) msl Sp. conductance:340 uS/cm Turbidity:20.7 NTU Water evacuated before sampling: 5 gal Well went dry during purging; samples collected after well recovered

Time: 14: 11 pH5.6 Alkalinity9 mg/L Water temperature: 22.2 deg C

Volumes purged: -7038 well volumes

LABORATORY ANALYSES

- H &T Analyte

Gross alpha Nitrate as nitrogen Nonvolatile beta

Aluminum, total recoverable Arsenic, total recoverable Barium, total recoverable Cadmium, total recoverable Chromium, total recoverable Iron, total recoverable Lead, total recoverable Manganese, total recoverable Mercury, total recoverable Radium-226 Radium-228 Selenium, total recoverable Silver, total recoverable Sodium, total recoverable Sulfate

Number of Records: 20

+ Tritium

* PH

Result

1.5 1 574 1 < 1 1 31.6 1 162 1 < 12 1 6.1 1 <4.7 1 2.5 1 1680 1 8.4 1 14.9 1 .191 1 c.18 1 < .4 1 < 19 1 < 1.4 1 76000 1 19OOOO 50 5.35 1

TM WA TM TM WA WA WA WA WA WA WA WA WA TM TM WA WA WA WA WA

* = exceeded holding time. + = exceeded screening level or final primary drinking water standard.

H-Area Acidcaustic Basin 0-8 Second Quarter 1995

WSRGTR-95-01 47-2 Unclassified

WELL: HAC 3

SRS Coord.. Lathngitude Screen Zone Elevation Top of Casing Casing Pump Formation N 72183.4 33.285461 Deg N 275-255 ft msl 298 ft msl 4"PVC s Water Table 61313.6 81.645564 Deg W

FIELD MEASUREMENTS

Sample date 04/25/95 Time: 13:15 Depth to water: 28.02 ft (8.543 m) below TOC Water elevation: 269.98 ft (82.3 1 m) msl Sp. conductance:277 uS/cm Turbidity:15.2 NTLT Water evacuated before sampling: 9 gal Well went dry during purging; samples collected after well recovered

LABORATORY ANALYSES

H ST Analvte Result Mod Unit Flag Lab

pH5.4 Alkalinity:8 mgL Water temperature: 22.3 deg C

Volumes purged: .9 159 well volumes

Gross alpha Nitrate as nitrogen

. Nonvolatile beta + Tritium

Aluminum, total recoverable Arsenic, total recoverable Barium, total recoverable Cadmium, total recoverable Chromium, total qecoverable Iron, total recoverable Lead, total recoverable Manganese, total recoverable Mercury, total recoverable Radium-226 Radium-228 Selenium, total recoverable Silver, total recoverable Sodium, total recoverable Sulfate

Number of Records: 20 PH *

1.6 1 p c i n 0 TM

< 1.2 1 UI pci/L 0 TM 35.52 1 ' pci/mL 2 TM

1580 2 ug/L 0 WA

129 1 v U g L 2 ' WA c 1 2 1 U ug/L 0 WA 8.2 1 u g n 0 WA c4.7 1 U u g n 0 WA <10 1 U u g n 0 ' WA 416 1 U g L . 2 WA 15 1 ugn 0 WA 37.8 1 ugn 1 WA -214 1 J U g n 0 WA -26 1 J pCiL 0 TM 2.9 1 ' p c i / L 0 TM

c 1.4 1 U ug/L 0 WA < 19 1 U u g n 0 WA .

41300 1 u g n 0 WA -116OOO 200 U g L 0 WA 5.46 1 J PH 0 WA

* = exceeded holding time. + = exceeded screening level or find primary drinking water standard.

H-Area Acidcaustic Basin D-9 Second Quarter 7995

WELL: HAC 4

SRS Coord.. Lat/Longitude Screen Zone Elevation ToD of Casing Casing Formation N 72120.3 33.285416 Deg N 274.1-254.1 ft msl 296.9 ft msl 4" PVC S 6 1372 81.645287 Deg W

Water Table

FIELD MEASUREMENTS

Sample date: 04/25/95 Time: 1258 Depth to water: 26.55 ft (8.095 m) below TOC Water elevation: 270.35 ft (82.42 m) msl Sp. conductance: 61 uS/cm Turbidity: 1.4 Water evacuated before sampling:48 gal

pH:5 Alkalinity:O mg/L Water temperature: 22.5 deg C

Volumes purged: 4.503 well volumes

LABORATORY ANALYSES

fl ST Analvte Result DF Mod Unit Flap Lab

Nonvolatile beta

Aluminum, total recoverable Arsenic, total recoverable Barium, total recoverable Cadmium, total recoverable Chromlum, total recoverable Iron, total recoverable Lead, total recoverable Manganese, total recoverable Mercury, total recoverable Radium-226 Radium-228 Selenium, total recoverable Silver, total recoverable Sodium, total recoverable Sulfate

+ Tritium

PH PH

* * Number of Records: 21

2 1 J p c i n 0 TM 23.3 1 pci/mL 2 TM 178 1 ug/L 2 WA < 12 1 U ug/L 0 WA 6 1 J ug/L 0 WA c4.7 1 U U g n 0 WA

34.7 1 ug/L 0 WA '

3.8 1 J U g L 0 WA 19.6 1 ugn 0 WA

. -395 1 J U g n 0 WA

< l o 1 u X U g L 0 WA

c . 1 1 UI p c i n 0 TM 1.6 1 pci/L 0 TM

7780 1 u g n 0 WA

4.97 1 J PH 0 WA

< 19 1 U u s n 0 WA . < 1.4 1 U U g n 0 WA

6740 1 u g n 0 WA , 4.98 1 J PH 0 WA

H-Area AcioVCaustic Basin PI0 Second Quarter 1995

Appendix E

Data OualityAJsability Assessment

WSRGTR-950141-2

Data Quality/Usability Assessment

Quality assurance/quality control (QA/QC) procedures relating to accuracy and precision of analyses performed on groundwater samples are followed in the field and laboratory and are reviewed prior to publication of results. The review by the Environmental Protection Department/Environmental Monitoring Section (EPD/EMS) of the volume of analytical data acquired each quarter and presented in various reports is an ongoing process; its review of the QAIQC data cannot be completed in time to meet the deadlines for the reports required by the Resource Conservation and Recovery Act and associated regulations. Other site and regulatory personnel can obtain further information on the data quality and usability in a variety of ways, including those described below.

D a b Qua/Xkation

The contract laboratories continually assess their own accuracy and precision according to U.S. Environmental Protection Agency (EPA) guidelines. They submit sample- or batch-specific QA/QC information either at the same time as analytical results or in quarterly summaries. Properly defined and used result modifiers (also referred to as qualifiers) can be a key component in assessing data usability. Result modifiers designed by EPD/EMS and used by the primary laboratories are presented in Appendix D.

Assessment of Acwracy of the Dab

Accuracy, or the nearness of the reported result to the true concentration of a constituent in a sample, can be assessed in several ways.

A laboratory's general accuracy can be judged by analysis of results obtained from known samples. The non-radionuclide contract laboratories analyze commercial reference samples every quarter at EPD/EMS' request. The results of these analyses are presented in the EPD/EMS groundwater monitoring quarterly reports. The primary laboratories also seek or maintain state certification by participating periodically in performance studies; reference samples and anglysis of results are provided by EPA. Results of these studies also are published in the EPD/EMS quarterly reports.

Analysis of blanks provides a tool for assessing the accuracy of both sampling and laboratory analysis. Results for all field blanks for the quarter can be found in the , EPD/EMS quarterly reports. Any field or laboratory blanks that exceed established minimums are identified in the same reports, in tables associating them with groundwater samples analyzed in the same batches.

Surrogates, organic compounds similar in chemical behavior to the compounds of interest but not normally found in environmental samples, are used to monitor the effect of the matrix on the accuracy of analyses for organic parameters. For example, for analyses of volatile organics be EPA Method 8240, three surrogate compounds are added to all samples and blanks in each analytical batch. In analyses of semivolatile organics, three acid compounds and three base/neutral compounds are used. Two surrogates are used in organochlorine pesticides analyses. Percent recoveries for surrogate analyses are calculated by laboratory personnel, reported to EPD/EMS, reviewed, and entered into the database, but they are not published. If recoveries, are not within specified limits, the laboratory is

H-Area AaWCaustic Basin E-3 Second Qwrtw 1995

WSRGTR-950141-2 U .

expected to reanalyze the samples or attach qualifiers to the data identifying the anomalous results.

I

. Sample-specific accuracy for both organic and inorganic parameters can be assessed by examination of matrix spikehatrix spike duplicate results; A sample is

' analyzed unspiked to determine a baseline set of values. A second portion of the sample is spiked with known concentrations of compounds appropriate to the analyses being performed, typically five volatile organic compounds for volatile organics analyses, eleven semivolatile compounds for semivolatiles, six pesticide compounds for pesticides, all metals for metals analyses by SW-846 methods (EPA, 19861, and a known quantity of cyanide for cyanide analysis. The percentage of the spike compound that is recovered (i.e., measured in excess of the value obtained for the unspiked sample) is a direct measure of analytical accuracy. EPA requires matrix spike/matrix spike duplicates to be run at least once per 20 samples of similar matrix.

Matrix spike/matrix spike duplicate results are reported to EPD/EM/S but are not published. For organic compounds, according to EPA guidelines, no action is taken on the basis of matrix spikehatrix spike duplicate data alone (i.e., no result modifiers are assigned solely on the basis of matrix spike results); however, the results can indicate if a laboratory is having a systematic problem in the analysis of one or more analytes.

In the case of inorganic compounds, such as metals, the matrix spike sample analysis provides information about the effect of each sample matrix on the digestion and measurement methodology. Data qualifiers assigned by the laboratories on the bitsis of the percentage of spike recovery are reported in the published results tables.

Assessment of Plecr'srn

Precision of the analyses, or agreement of a set of replicate results among themselves, is assessed through the use of duplicates initiated by the laboratory and blind replicates provided by EPD/EMS. The results of duplicate and replicate analyses are presented in those results tables of the quarterly reports which report only one quarter of data, usually during first, second, and third quarters. Duplicate and replicate results are not presented in results tables that report more than one quarter of.data, generally provided in fourth quarter reports. In this case, the results tables instead present only the highest result for each analyte for each quarter of the year.

The labdratories assess precision by calculating the relative percent difference (RPD) for each pair of laboratory-initiated duplicate results. One of the contract laboratories uses a data qualifier(J3) BQ modify metals analyses when the RPD for laboratory duplicates is greater than 20 percent.

Additional statistical comparisons of laboratory duplicate and blind replicate results, both intra- and interlaboratory, are presented in the EPD/EMS quarterly reports. The calculation used for these reports is the mean relative difference (MRD) which is similar to EPA's RPD except that the MRD is the average of all the RPD values from one laboratory for each compound (intralaboratory MRD) or all the RPD values from all laboratories for each compound (interlaboratory MRD), during one quarter. Because detection limits may vary among samples, the MRD requires calculation of a reference detection limit, which is the detection limit at the 90th percentile of the

H-Area Acid/Caustic 8ash E 4 ssoond am* 1996

WSRGTR-S&01~1-2 Und.+oified

array of limits in the population of all duplicate and replicate analyses for a given analyte during a particular quarter. The MRD is not method-specific.

Method-SpecEc Accuracy and Precision

The contract laboratories' EPA-approved laboratory procedures include QA/QC requirements as an integral part of the methods. Thus, knowledge of the method used in obtaining data is an important component of determining data usability. EPA has conducted extensive research and development on the methods approved for the analysis of water and waste water; information on the accuracy and precision of a method is available from EPA publications, as is full information on required QA/QC procedures. A listing of the methods used by the primary laboratories during fourth quarter 1993 is given below along with the source for the method description. Many, if not all, of these sources include presentations of representative accuracy and precision results.

Metbods Used by tbe Contract Laboratories

Method Used to Analvze Source

EPA EMSL, 1983 EPAl20.1 ' Specific conductance EPA EMSL, 1983 EPA EMSL, 1983

EPA150.1 PH

EPA EMSL, 1983 EPAl60.1 Total dissolved solids EPAl60.2 EPAl80.1 Turbidity EPA EMSL, 1983 EPA200.7 Metals EPA EMSL, 1983 EPA204.2 Antimony EPA EMSL, 1983

Arsenic EPA EMSL, 1983 EPA206.2 Lead EPA EMSL, 1983 EPA239.2

EPA245.1 Mercury EPA EMSL, 1983 EPA EMSL, 1983 EPA270.2 Selenium

Thallium EPA EMSL, 1983 EPA279.2 EPA EMSL, 1991 EPA300.0 Chloride, nitrite, sulfate

EPA310.1 Alkalinity EPA EMSL, 1983 EPA325.2 Chloride EPA EMSL, 1983

Cyanide EPA EMSL, 1983 EPA335.3 EPA340.2 Fluoride EPA EMSL, 1983 EPA353.1 Nitrogen, nitrate-nitrite EPA EMSL, 1983 EPA353.2 Nitrogen, nitrate, nitrite, or combined EPA EMSL, 1983 EPA36 5.1 EPA EMSL, 1983 EPA365.2 EPA EMSL, 1983 EPA37 6.2 Sulfide EPA EMSL, 1983

EPA EMSL, 1983 EPA413.1 Oil 81 grease EPA415.1 EPA EMSL, 1983

Total dissolved solids, total suspended solids

Phosphorus, all forms (reported as total phosphates) Phosphorus, all forms (reported as total phosphates)

Dissolved organic carbon, total inorganic carbon, total organic

EPA418.1 EPA420.2 EPA9OO.O EPA900. 1 EPA906.0 EPA6O 1 0 EPA7041 EPA7060 EPA742 1 EPA7470 EPA7740 EPA7841

carbon Total petroleum hydrocarbons Phenols Gross alpha, nonvolatile beta Total alpha-emitting radium Tritium Metals Antimony Arsenic Lead Mercury Selenium Thallium

EPA EMSL, 1983 EPA ElrdlSL, 1983 EPA EMSL, 1980 EPA EMS, 1980 EPA EMSL, 1980 EPA, 1986 EPA, 1986 EPA, 1986 EPA, 1986 EPA, 1986 EPA, 1986 EPA, 1986

I WSRGTR-SW 14 1-2

U##&S&id

EPA80 1 0 Chlorinated volatile organics EPA, 1986 EPA8080 Organochlorine pesticides and PCBs EPA, 1986 €PA8150 ' Chlorinated herbicides EPA, 1986 EPA8240 GCMS volatiles EPA, 1986 EPA8270 GCMS semivolatiles ' EPA, 1986 EPA8280 Dioxins and furans EPA, 1986 EPA9012 Cyanide EPA, 1986 EPA9020 Total organic halogens EPA, 1986 EPA9020A Total organic halogens EPA, 1986 EPA9030 Sulfide EPA, 1986 EPA9060 Dissdved organic carbon, total inorganic carbon, total organic EPA, 1986

carbon

An example of available method-specific QA/QC information is that for the analysis of metals by EPA Method 601 0/200.7 (EPA, 1986/EPA EMSL, 1983). The primary laboratories, General Engineering Laboratories (GE) and Roy F. Weston, Inc. (Weston), use this inductively coupled plasma (ICP) atomic emission spectrometric method.

The following precision and accuracy data are based on the experience of seven laboratories that applied the ICP techniqwe to acid-distilled water matrices that had been spiked with various metal concentrates. (Note: Not all seven laboratories analyzed all 1 4 elements.) The references give results for samples having three concentration ranges; the results here are for samples having the lowest values, similar to actual groundwater results for SRS.

JCP Precr'srn and Accuracy Data

.

Mean reported Element True value (man1 value h P / L l

Mean percent m a

Aluminum 60 62 33 Arsenic 22 19 23 Beryllium 20 20 9.8 Cadmium 2.5 2.9 16 Chromium 10 1 0 18

~ Cobalt 20 20 4.1 Copper 11 . 11 40 Iron 20 19 15 Lead 24 30 32 Manganese 15 15 6.7 Nickel 30 28 11 Selenium 6 8.5 42 Vanadium 7 0 69 2.9 Zinc 16 19 45

a Relative standard deviation. In EPA (19861, the column heading is Mean Standard Deviation (%).

As another example, EPA Method 601/8010 tEPA, 1991/EPA, 1986) is used by both GE and Weston for analyses of halogenated volatile organics. In the presentation of the method in both references, the following table gives method- specific accuracy and precision as functions of concentration. Contract laboratories are expected to achieve or a t least approach these limits.

H-Am Ad&Ch~ti .~ Barn. E-6 soGod h r t * 1996

WRC-TR-960 f41-2

Accuracy and PIeCisin as Funcgons of Concentration for €PA Method 60 1/80 10

Accuracy as Single analyst Overall Parameter recoverv, ~2 lrna/Ll precision (manlb precision Irna/LIc

1.1 2c-1.02d 0.96C-2.05 0.12 +0.58 0.76C-1.27 0.28 + 0.27 0.98C-1.04 0.1 5 + 0.38 1 .OOC-1.23 0.15-0.02 0.99c-1.53 .O. 14-0.1 3 1 .ooc 0.20 0.93C-0.39 0.13+0.15

. 0.77C+0.18 0.28-0.31 0.94C+ 2.72 0.11 +1.10 0.93C+ 1.70 0.20 + 0.97 0.95C+0.43 0.1 4+2.33 0.93C-0.09 0.15+0.29 0.95C-1.08 0.09 +0.17 1.04C-1.06 0.1 1 +0.70 0.98C-0.87 0.21 -0.23 0.97C-0.16 0.11 +1.46 0.91 c-0.93 0.1 1 +0.33

'1 .ooc 0.13 1 .ooc 0.18 1 .ooc 0.18 0.95C+0.19 0.1 4 + 2.41 0.94C+ 0.06 0.1 4 + 0.38 0.90C-0.16 0.1 5 + 0.04 0.86C+ 0.30 0.13-0.1 4 0.87C+ 0.48 0.13-0.03 0.89C-0.07 0.1 5 + 0.67 0.97C-0.36 0.13 + 0.65

0.1 1 + 0.04*

a X' = expected recovery for one or more measurements of a sample containing a concentration of C, inmgil. Expected single analyst standard deviation of measurements. Expected interlaboratory standard deviation of measurements. C = true value for the concentration, in mgR.

concentration of C, in mg/L.

'

e

f

= average recovery found for measurements of samples containing a

Estimates based on performance of a single laboratory.

Bromodichloromethane Bromoform Bromomethane Carbon tetrachloride Chlorobenzene Chloroethane 2-Chloroethyl vinyl etherf Chloroform Chloromethane Dibromochloromethane 1,2-Dichlorobenzene 183-Dichlorobenzene 1 ,4-Dichlorobenzene 1,l -Dichloroet,bne 1,2-DichIoroethane 1,l -Dichloroethene trans-l,2-Dichloroethene Dichloromethane

(Methylene chloride) 182-Dichioropropanef cis-183-Dichloropfopenef trans- 1 ,3-Dichloro&openef 1 ,lr2,2-Tetrachloroethane Tetrachloroethylene 1 , 1 , 1 -Trichloroethane 1 lr2-Trichloroethane Trichloroethylene TricMorof luoromethane Vinyl chloride

0.20 + 1 -00 0.21 +2.41 0.36 + 0.94 0.20 + 0.39 0.18+1.21 0.1 7 +0.63 0.35 0.1 9-0.02 0.52 + 1.31 0.24+ 1.68 0.1 3 + 6.1 3 0.26 + 2.34 0.20+0.41 0.14+0.94 0.1 5 + 0.94 0.29-0.40 0.17 + 1.46 0.21 + 1.43

0.23 0.32 0.32 0.23 + 2.79 0.1 8 +2.21 0.20 + 0.37 0.1 9 +0.67 0.23 + 0.30 0.26 +0.91 0.27 + 0.40

H-Area AaV/Caustic Basin E-7

WSRGTR-950 141-2 UdOSSXSd

References

EPA (U.S. Environmental Protection Agency), 1986. Test Methods for Evaluating Solid Waste (SW-8461, Volumes IA-IC. Washington, DC.

EPA (U.S. Environmental Protection Agency), 1991. Guidelines Establshinng Test Procedures for the Analysis of Pollutants, Code of Federal Regulations, Title 40, Part 136, Appendix A. Washington, DC.

EPA EMSL (U.S. Environmental Protection Agency, Environmental Monitoring and Systems Laboratory), 1 980. Prescribed Procedures for Measurement of Radioactivity in Drinking Water, EPA-600/4-80-032. Cincinnati, OH.

EPA EMSL (U.S. Environmental Protection Agency, Environmental Monitoring and Systems Laboratory), 1983. Methods for Chemical Analysis of Water and Wastes. Cincinnati, OH.

EPA EMSL (U.S. Environmental Protection Agency, Environmental Monitoring and Systems Laboratory), 199 1 . Test Method, The Determination of Inorganic Anions in Water by Ion Chromatography-Method 300.0. Cincinnati, OH.

H-Area Add/Courtk Basin €4