April 24, 2018

This document gives pertinent mformation concerning the reissuance of the VPDES Permit listed below. This permit is beingprocessed as a Minor, Municipal permit. The discharge results from the operation of a 0.0008 MOD wastewater treatment plant. Thispermit action consists of updating the proposed effluent limits to reflect the current Virginia WQS (effective June 5, 2017) andupdating permit language as appropriate. The effluent limitations and special conditions contained m this permit will maintain theWater Quality Standards of9VAC25-260 et seq.

1. Facility Name and MailingAddress:

Facility Location:

Facility Contact Name:

Facility E-mail Address:

Walk Residence STP

50 Randall Road,Stafford, VA 2255450 Randall RoadStafford, VA 22554

Mr. Doug CrooksWastemaster, LLCPO Box 36525Richmond, VA 23235

Crooks3 6 5 (S), aol, corn

SIC Code:NAICS Code:

County:

Telephone Number:

4952 WWTP221320 Sewage TreatmentFacilitiesStafford

800-626-5444

2. Permit No.: VA0089630

Other VPDES Permits associated with this facility:

Other Permits associated with this facility:

E2/E3/E4 Status: Not Applicable (NA)

Expiration Date ofprevious permit:

None

None

April 24, 2018

3. Owner Name:

Owner Contact/Title:

Owner E-mail Address:

Robert D. and Angela S. Watk

Owner

TREBORKLAW(%gmail.com

Telephone Number: 540-659-7289

4. Application Complete Date:

Permit Drafted By:

Draft Permit Reviewed By:

Draft Permit Reviewed By:

Public Comment Period:

December 8, 2017

Aim Zimmerman

Douglas Frasier

Alison Thompson

Start Date: August 24, 2018

Date Drafted:

Date Reviewed:

Date Reviewed:

End Date:

June 4, 2018

July 24, 2018

July 27, 2018

September 24, 2018

Receiving Waters Information: See Attachment 1 for the Flow Frequency Determination - The tier ammonia effluent limitation5. timeframe in the past and proposed VPDES permits is based on the tier timeframe expressed in the Policy for the Potomac River

Embayments and not in the Flow Frequency Determination Memorandum dated November 6, 1997.

Receiving Stream Name:

Drainage Area at Outfall:

Stream Basin:

Section:

Special Standards:

7Q 10 Low Flow:

1Q 10 Low Flow:

30Q10 Low Flow:

Harmonic Mean Flow:

Accokeek Creek, UT

0. 54 sq. mi.

Potomac River

Ib

b

0. 0 MOD

0. 0 MGD

0.0 MGD

0.0 MOD

Stream Code:

River Mile:

Subbasin:

Stream Class:

Waterbody ID:

6th Order HUC:

7Q10 High Flow:

1Q10 High Flow:

30Q10 High Flow:

30Q5 Flow:

laXHZ

0. 22

Potomac River

Ill

VAN-A29R

PL58

0.0 MOD

0.0 MGD

0.0 MOD

0.0 MGD

VPDES PERMIT PROGRAM FACT SHEET VA0089630PAGE 2 of 12

6. Statutory or Regulatory Basis for Special Conditions and Effluent Limitations:

X State Water Control Law X EPA Guidelines

X Clean Water Act X Water Quality Standards

X VPDES Permit Regulation X

X EPANPDES Regulation

7. Licensed Operator Requirements: Class IV

8. Reliability Class: Class I

Other (Policy for the Potomac RiverEmbayments - 9VAC25-415 et seq. *)

9. Permit Characterization:

X Private

Federal

State

POTW

X TMDL

Effluent Limited

X Water Quality Limited

Whole Effluent Toxicity Program Required

Pretreatment Program Required

X e-DMR Participant

Possible Interstate Effect

Compliance Schedule Required

Interim Limits in Permit

Interim Limits in Other Document

10. Wastewater Sources and Treatment Description:

The facility is a privately owned wastewater treatment plant serving one single family home with a design flow of 0.0008 MOD.On October 20, 2000, the construction of the plant was completed and a verbal Certificate to Operate was issued by the Vu'giniaDepartment of Health on October 31, 2000.

The wastewater treatment plant consists of two 1,000 gallon septic tanks (operated in series), a dosing tank, two biologicalfiltration sand filters, one 500 gallon sedimentation/filtration tank including chemical addition of aluminum salts, followed bytablet chlorination, cMorine contact tank, tablet dechlorination and post aeration via diffused air.

See Attachment 2 for a facility schematic/diagram.

TABLE 1 - OutfaU Description

OutfaUNumber

Discharge Source Treatment Design FlowOutfaULatitude andLongitude

001 Domestic Wastewater See Item 10 above. 0.0008 MGD 38° 26'48" N77° 28' 08" W

See Attachment 3 for Stafford County topographic map.

11. Sludge Treatment and Disposal Methods:

Over a year period, less than 0. 1 dry metric tons of sewage sludge is transported by Wheeler Septic (VDHRAHD17) to AquiaAdvanced Wastewater Treatment Plant (VA0060968) for further treatment and disposal.


12. Discharges and Monitoring Stations within Vicinity of Discharge (6th Order HUC PL58)

TABLE 2 - Dischargers and Monitoring Stations within Vicinity of Discharge

ID/Permit

Number Facility Name Type Receiving Stream

VAR051413

VAR050549

Rappahannock Regional Solid WasteManagement Board

Accokeek Creek, UT

Kaiser Aluminum Fabrication ProductsLLC

Stonnwater Industrial GP

Proctors Creek, UT

VAG406207 Meyer Jeffrey Residence Domestic Sewage GP Accokeek Creek

VA0089630 Walk Residence Sewerage TreatmentPlant

VPDES IP Accokeek Creek, UT

VAG 110029 Virginia Concrete Company - Stafford Concrete Products GPAccokeek Creek and

Accokeek Creek, UT

laACC006. 13 DEQ ambient water quality monitoring station located at Route 608

13. Material Storage:

TABLE 3 - Material Storage

Materials Description Volume Stored Spill/Stormwater Prevention Measures

Alum Salts

Chlorine Tablets

De-chlor Tablets

15 gallons45 pounds45 pounds

Stored in a covered container in the

control building

14. Site Inspection:

A Technical inspection was performed by DEQ-Water Compliance staff on September 27, 2017 (see Attachment 4).

15. Receiving Stream Water Quality and Water Quality Standards:

a. Ambient Water Quality DataThis facility discharges to an unnamed tributary to Accokeek Creek that has been neither monitored nor assessed. The nearestDEQ monitoring station is laACC006.13, which is located at Route 608, approximately 7. 8 miles downstream ofOutfall 001.The following is the water quality summary for this segment ofAccokeek Creek, as taken from the 2016 Integrated Report:

Class III, Section Ib, special stds. b.

DEQ monitoring stations located in this segment ofAccokeek Creek:. ambient water quality monitoring station laACC006. 13, at Route 608

E. coli monitoring finds a bacterial impairment, resulting in an impaired classification for the recreation use. A bacteria TMDLfor the Accokeek Creek watershed has been completed and approved. The aquatic life use is considered fully supporting. Thewildlife use is considered fully supporting. The fish consumption use was not assessed.

VPDES PERMIT PROGRAM FACT SHEET

b. 303fd'» Listed Stream Segments and Total Maximum Daily Loads ffMDLs)

VA0089630PAGE 4 of 12

TABLE 4 - Information on Downstream 303(d) Impairments and TMDLs

WaterbodyName

ImpairedUse Cause

Year FirstListed as

Impaired

DistanceFrom

OutfaU

TMDLcompleted

WLA Basis for WLA

Impairment Information in the 2016 Integrated Report

AccokeekCreek

Recreation E. coli 2002 5.2 miles

Potomac RiverTributaries in

Prince Williamand Stafford

Counties Bacteria

TMDL09/26/2013

1. 39E+09cfa/year E.

coli

126 cfa/lOOml

0.0008 MOD

Accokeek

Creek (tidal)Aquatic

LifeDissolvedOxygen

2006 9. 7 milesChesapeake Bay

TMDL12/29/2010

This facility is accounted for in theChesapeake Bay TMDL. It is includedin the NPDES Permit Inventory and ispart of an aggregated WLA for Total

Nitrogen, Total Phosphorus, and TotalSuspended Solids (Appendix Q).

Significant portions of the Chesapeake Bay and its tributaries are listed as impaired on Virginia's 3 03 (d) list of impaired watersfor not meeting the aquatic life use support goal, and the draft 2012 Virginia Water Quality Assessment 305(b)/303(d)Integrated Report indicates that much of the mainstem Bay does not fully support this use support goal under Virginia's WaterQuality Assessment guidelines. Nutrient enrichment is cited as one of the primary causes of impairment. EPA issued the BayTMDL on December 29, 2010. It was based, in part, on the Watershed Implementation Plans developed by the Bay watershedstates and the District of Columbia.

The Chesapeake Bay TMDL addresses all segments of the Bay and its tidal tributaries that are on the impaired waters list. Aswith all TMDLs, a maximum aggregate watershed pollutant loading necessary to achieve the Chesapeake Bay's water qualitystandards has been identified. This aggregate watershed loading is divided among the Bay states and their major tributarybasins, as well as by major source categories [wastewater, urban storm water, onsite/septic systems, agriculture, au- deposition].Fact Sheet Section 17. e provides additional information on specific nutrient limitations and monitoring for this facility toimplement the provisions of the Chesapeake Bay TMDL.

The full planning statement is found in Attachment 5.

c. Receivine Stream Water Quality Criteria

Part IX of 9VAC25-260(360-550) designates classes and special standards applicable to defined Virginia river basins andsections. The receiving stream Accokeek Creek, UT is located within Section Ib of the Potomac River Basin, and classified asa Class III water.

At all times, Class III waters must achieve a dissolved oxygen (D.O.) of 4.0 mg/L or greater, a daily average D.O. of 5.0 mg/Lor greater, a temperature that does not exceed 32°C, and maintain a pH of 6. 0-9. 0 standard units (S.U. ).

The Freshwater Water QualityAVasteload Allocation Analysis (Attachment 6) details other water quality criteria applicable tothe receiving stream.

Some Water Quality Criteria are dependent on the temperature and pH and Total Hardness of the stream and final effluent. Thestream and final effluent values used as part of Attachment 6 are as follows:

pH and Temperature for Ammonia Criteria:The fresh water, aquatic life Water Quality Criteria for Ammonia are dependent on the instream temperature and pH. Since theeffluent may have an impact on the instream values, the temperature and pH values of the effluent must also be consideredwhen determining the ammonia criteria for the receiving stream. The 90tfa percentile temperature and pH values are usedbecause they best rqwesent the critical conditions of the receiving stream.


The 30Q10, 7Q10 and 1Q10 of the receiving stream are 0.0 MGD. In cases such as this, effluent pH and temperature data maybe used to establish the ammonia water quality criteria. The facility's effluent pH 90fll percentile value was determined to be7. 7 S.U. for the monitoring period of April 2013 through March 2018. DEQ's default temperature value of25°C with a wetseason default of 15°C was used. See Attachment 7 for the derivation of the 90th percentile values of the effluent pH.

Total Hardness for Hardness-Dependent Metals Criteria:The Water Quality Criteria for some metals are dependent on the receiving stream's total hardness (expressed as mg/L calciumcarbonate) as well as the total hardness of the final effluent.

There is no hardness data for this facility or receiving stream. Because of this, the average hardness value was determined byusing the DEQ's downstream ambient monitoring station (laACC006. 13) stream data for the period of October 1990 throughJune 2003. The average hardness of this monitoring station is 25.8 mg/L and can be found in Attachment 8. Since the 7Q10for the receiving stream is 0.0 MGD, it is staffs professional judgement that this hardness value may be used as it is indicativeof the receiving waters. The hardness-dependent metals criteria shown in Freshwater Water QualityAVasteload AllocationAnalysis (Attachment 6) are based on the average value from the downstream ambient monitoring station.

Bacteria Criteria:

The Virginia Water Quality Standards at 9VAC25-260-170A state that the following criteria shall apply to protect primaryrecreational uses in surface waters:

E. coli bacteria per 100 ml of water shall not exceed a monthly geometric mean of the following:

Freshwater E. coli (N/100 ml)

Geometric Mean1

126

'For a minimum of four weekly samples [taken during any calendar month].

d. Receivine Stream Special Standards

The State Water Control Board's Water Quality Standards, River Basin Section Tables (9VAC25-260-360, 370 and 380)designates the river basins, sections, classes, and special standards for surface waters of the Commonwealth of Virginia. Thereceiving stream, (insert stream name), is located within Section Ib of the Potomac River Basin. This section has beendesignated with a special standard of "b".

Special Standard "b" (Potomac Embayment Standards) established effluent standards for all sewage plants discharging intoPotomac River embayments and for expansions of existing plants discharging into non-tidal tributaries of these embayments.9VAC25-415, Policy for the Potomac River Embayments controls point source discharges of conventional pollutants into theVirginia embayment waters of the Potomac River, and theu- tributaries, from the fall line at Chain Bridge in Arlington Countyto the Route 301 Bridge in King George County. The regulation sets effluent limits for cBODs, total suspended solids,phosphoms, and ammonia, to protect the water quality of these high profile waterbodies.

e. Threatened or Endangered Species

The Virginia DGIF Fish and Wildlife Information System Database was searched on July 3, 2018 for records to determine ifthere are threatened or endangered species in the vicinity of the discharge (Attachment 9). The following threatened orendangered species were identified within a 3 mile radius of the discharge: Dwarf Wedgemussel (Alamidonta heterodon),Atlantic Sturgeon (Acipenser oxyrinchus). Northern Long-Eared Bat (Myotis septentrionalis). Little Brown Bat (Myotislucifugus lucifugus), Tri-colored Bat (Perimyotis subflavus), Loggerhead Shrike (Lanius ludovicianus), Green Floater(Lasmigona subviridis) and Migrant Loggerhead Shrike (Lanius ludovicianus migrans). The limits proposed in this draft permitare protective of the Virginia Water Quality Standards and protect the threatened and endangered species found near thedischarge.

16. Antidegradation (9VAC25-260-30):

All state surface waters are provided one of three levels ofantidegradation protection. For Tier 1 or existing use protection,existing uses of the water body and the water quality to protect these uses must be maintained. Tier 2 water bodies have waterquality that is better than the water quality standards. Significant lowering of the water quality of Tier 2 waters is not allowedwithout an evaluation of the economic and social impacts. Tier 3 water bodies are exceptional waters and are so designated byregulatory amendment. The antidegradation policy prohibits new or expanded discharges into exceptional waters.

The critical flows for the stream are zero and at times the stream flow is comprised of only effluent. It is staffs professional


judgement that such streams are Tier 1. Permit limits proposed have been established by determining wasteload allocations whichwill result in attaining and/or maintaining all water quality criteria which apply to the receiving stream, including narrativecriteria. These wasteload allocations will provide for the protection and maintenance of all existing uses.

17. Effluent Screening, Wasteload Allocation, and Effluent Limitation Development:

To determine water quality-based effluent limitations for a discharge, the suitability of data must first be determined. Data issuitable for analysis if one or more representative data points is equal to or above the quantification level ("QL") and the datarqM-esent the exact pollutant being evaluated.

Next, the appropriate Water Quality Standards (WQS) are determined for the pollutants in the effluent. Then, the WasteloadAllocations (WLA) are calculated. In this case since the critical flows 7Q10, 1Q10 and 3 OQ 10 have been determined to be zero,the WLA's are equal to the WQS. The WLA values are then compared with available effluent data to determine the need foreflEluent limitations. Effluent limitations are needed if the 97th percentile of the daily effluent concentration values is greater thanthe acute wasteload allocation or if the 97th percentile of the four-day average effluent concentration values is greater than thechronic wasteload allocation. Efifluent limitations are based on the most limiting WLA, the required sampling frequency, andstatistical characteristics of the efEluent data.

a. EfHuent Screening:Effluent data obtained from the permit application and DMRs from the second quarter of 2013 to the first quarter of 2018 hasbeen reviewed and determined to be suitable for evaluation. Please see Attachment 7 for a summary ofeffluent data.

The following pollutants require a wasteload allocation analysis: Ammonia as N and Total Residual CUoruie.

b. Mixing Zones and Wasteload Allocations CWLAs):Wasteload allocations (WLAs) are calculated for those parameters in the effluent with the reasonable potential to cause anexceedance of water quality criteria. The basic calculation for establishing a WLA is the steady state complete mix equation:

^ Co[Qe+(f)(Qs)]- [(Cs)(f)(Qs)]Qe

WLA

Where: WLACoQeQs

f

Cs

Wasteload allocation

In-stream water quality criteriaDesign flowCritical receiving stream flow(1Q10 for acute aquatic life criteria; 7Q10 for chronic aquatic life criteria;3 OQ 10 for ammonia criteria; harmonic mean for carcinogen-human healthcriteria; and 30Q5 for non-carcinogen human health criteria)Decimal fraction of critical flowMean background concentration of parameter in the receiving stream.

The water segment receiving the discharge via Outfall 001 is considered to have a 7Q10, 30Q10 and 1Q10 of 0.0 MGD. Assuch, there is no mixing zone and the WLA is equal to the Co.

c. Effluent Limitations Toxic Pollutants, Qytfall 001

9VAC25-31-220.D. requires limits be imposed where a discharge has a reasonable potential to cause or contribute to an in-stream excursion of water quality criteria. Those parameters with WLAs that are near effluent concentrations are evaluated forlimits.

The VPDES Permit Regulation at 9VAC25-31-230.D requires that montMy and weekly average limitations be imposed forcontinuous discharges from POTWs and monthly average and daily maximum limitations be imposed for all other continuousnon-POTW discharges.

1) AmmoniaasN:

The ammonia effluent limit for April 1st through October 31st is set by the Policy for the Potomac River Embayments(9VAC25-415-40). During this period, the ammonia effluent limitation is 1.0 mg/L.

Staff reevaluated pH and temperature data of the facility to determine if the ammonia effluent limitations for the period ofNovember 1st through March 31st were still appropriate. This evaluation showed that the ammonia limitation could be


relaxed to 7. 0 mg/L; however, because the facility has demonstrated that the current 3. 1 mg/L effluent limitation can becomplied with, this existing effluent limitation will remain in the permit (See Attachment 10 and Attachment 11 for 1998and 2018 ammonia calculations, respectively).

The Environmental Protection Agency (EPA) finalized new, more stringent ammonia criteria in August 2013; possiblyresulting in significant reductions in ammoma effluent limitations. Staff understands that the incorporation of those criteriainto the Virginia Water Quality Standards is forthcoming. This and many other facilities may be required to comply withthese new criteria during their next respective permit terms. It is not known if the above assumptions will still beapprophate after the incorporation of the new criteria; the ammonia limits will be revisited during the next reissuance.

2) Total Residual Chlorine:

Chlorme is used for disinfection and is potentially in the discharge. Staff calculated WLAs for TRC using critical flows.In accordance with current DEQ guidance, staff used a default data point of 0.2 mg/L and the calculated WLAs to derivelimits. A monthly average of 0.016 mg/L and a weekly average limit of 0.016 mg/L are proposed for this discharge (seeAttachment 11).

3) Metals/Oreanics:

No metals or organics data were available for review; therefore, no effluent limits are proposed.

d. Effluent Limitations and Momtorine. Outfall 001 - Conventional and Non-Conventional Pollutants

No changes to dissolved oxygen (D.O.), carbonaceous biochemical oxygen demand-5 day (cBOD5), total suspended solids(TSS), Ammonia as N, Total Phosphorus (TP), Total Residual Chlorme, and pH limitations are proposed.

cBOD5, TSS, Ammonia as N (April - October) and TP limitations are based on the Policy for the Potomac River Embayments(9VAC25-415 et. seq.)

D.O. limitations are based on Water Quality Standards.

Total Residual Chlorine and pH limitations are set at the water quality criteria.

E. coli limitations are in accordance with the Water Quality Standards 9VAC25-260-170.

e. Effluent Annual Average Limitations and Monitoring, Oytfall 001 - Nutrients

VPDES Regulation 9VAC25-31-220(D) requires effluent limitations that are protective of both the numerical and narrativewater quality standards for state waters, including the Chesapeake Bay.

As discussed in Section 15, significant portions of the Chesapeake Bay and its tributaries are listed as impaired with nutrientenrichment cited as one of the primary causes. Virginia has committed to protecting and restoring the Bay and its tributaries.

Nonsignificant dischargers are subject to aggregate wasteload allocations for Total Nitrogen (TN), Total Phosphoms (TP), andSediments under the Total Maximum Daily Load (TMDL) for the Chesapeake Bay. Monitoring for Nitrates + Nitrites, TotalKjeldahl Nitrogen and Total Nitrogen are included in this permit. The monitoring is needed to protect the Water QualityStandards of the Chesapeake Bay. Monitoring frequencies are set at the frequencies set forth in 9VAC25-820. The monitoringis to verify the assumptions under the approved Watershed Implementation Plan as provided in Guidance Memo No. 14-2011,Nutrient Monitoring for "Nonsignificant" Discharges to the Chesapeake Bay Watershed.

f. Effluent Limitations and Monitorine Summary:

The effluent limitations are presented in the following table. Limits were established for cBODs, Total Suspended Solids,Ammonia as N, pH, Dissolved Oxygen, Total Residual Chlorine, E.coli, and Total Phosphoms. Monitormg was established forFlow, Total Nitrogen, Total Kleldahl Nitrogen, and Nitrite + Nitrate, as N.

The mass loading (kg/d) for monthly and weekly averages were calculated by multiplying the concentration values (mg/L),with the flow values (in MGD) and a conversion factor of 3. 785.


Sample Type and Frequency are in accordance with the recommendations in the VPDES Permit Manual; however, thefrequency of analysis were increased from the VPDES Permit Manual's recommendations due to human health concerns fromonce per year to quarterly during the 2003 permit reissuance. For this permit reissuance, the sample type and frequency ofanalysis will continue as in the previously issued permit.

The VPDES Permit Regulation at 9VAC25-31-30 and 40 CFR Part 133 require that the facility achieve at least 85% removalfor cBOD5 and TSS (or 65% for equivalent to secondary). The limits in this permit are technology-based effluent limits andresult in greater than 85% removal.

18. Antibacksliding:

All limits in this permit are at least as stringent as those previously established. Backsliding does not apply to this reissuance.


19. Effluent Limitatioas/Monitoring Requirements:Design flow is 0.0008 MOD.Effective Dates: During the period beginning with the permit's effective date and lasting until the expiration date.

PARAMETERDISCHARGE LIMITATIONSBASIS

FORLIMITS Monthly Average Weekly Average Minimum

MONITORINGREQUIREMENTS

Maximum Frequency Sample Type

Flow (MOD)

pHcBOD5

Total Suspended Solids (TSS) (a>Dissolved Oxygen (DO)

Ammonia, as N (April 1st - October31st)Ammonia, as N (November 1st -March 31st)E. co/;' (Geomeb-ic Mean) (b)Total Residual Chlorine

(after contact tank)Total Residual Chlorine

(after dechlorination)

Total Phosphorus

Total Kjeldahl Nitrogen (TKN) <d)Nitrite + Nitrate, as N W

Total Nitrogen <d«e'

NA

3

5

5

3

5

3

3

2, 3,4

3

5

3,6

3,63,6

NL NA

NA NA

5mg/L 0.02kg/day 8 mg/L 0.03 kg/day

6.0mg/L 0.02kg/day 9.0mg/L 0.03 kg/day

NA NA

l. Omg/L 0. 003 kg/day 1.5 mg/L 0. 005 kg/day

3. 1 mg/L 3. 1 mg/L

126n/100mL

NA

NA

NA

0. 016mg/L 0.016mg/L

0. 18 mg/L 0.0005 kg/day 0.27 mg/L 0. 0008 kg/day

NL mg/L NA

NLmg/L NA

NLmg/L NA

NA

6.0 S.U.

NA

NA

5. 0 mg/L

NA

NA

NA

l.Omg/L

NA

NA

NA

NA

NA

The basis for the limitations codes are:

1.

2.

3.

4.

MOD

NA

NL

s.u.

Million gallons per day.

Not applicable.

No limit; monitor and report.

Standard units.

NL

9.0 S.U.

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

NA

1/3M

1/YR

1/3M ®

1/3M 0

1/3M W

1/3M 0

1/3M (0

1/3M <9

l/3M(f)-(e)

1/YR(C)

1/3M W

1/3M 0

1/3M 0

1/YR

1/YR

1/YR

EST

Grab

Grab

Grab

Grab

Grab

Grab

Grab

Grab

Grab

Grab

Grab

Grab

Calculated

= Once every three (3) months.

= Once per year.Federal Effluent Requirements

Professional Judgement

Water Quality Standards

DEQ Disinfection Guidance

9VAC25-415 et seq. (Policy for thePotomac River Embayments)

>. Chesapeake Bay TMDL/WlP/Agency Guidance

Estimate= Reported flow is to be based on the technical evaluation of the sources contributing to the discharge.

Grab= An individual sample collected over a period of time not to exceed 15 minutes.a. TSS shall be expressed as two significant figures.b. Samples shall be collected between the hours of 10 A.M. and 4 P.M.c. The pennittee shall sample and submit E. coli results at the frequency of once every week during July each year. A total of four (4) weeklysamples shall be used to calculate the geometric mean.d. Nitritet-Nitrate, as N and TKN shall be collected on the same day.e. Total Nitrogen = Sum ofTKN plus Nitrite+'Nitrate, as N.f. The quarterly monitoring periods shall be January through March, April through June, July through September, and October throughDecember. The DMR shall be submitted no later than the 10th day of the month following the monitoring period.g. For compliance purposes, the sample for the October through December monitoring period for Ammonia, as N shall be collected inNovember or December


20. Other Permit Requirements:

Part I.B. of the permit contains additional chlorine monitoring requirements, quantification levels and compliance reportinginstructions.

These additional chlorine requirements are necessary per the Sewage Collection and Treatment Regulations at 9VAC25-790and by the Water Quality Standards at 9VAC25-260-170. A minimum chlorine residual must be mamtamed at the exit of thechlorine contact tank to assure adequate disinfection. No more that 10% of the monthly test results for TRC at the exit of thechlorine contact tank shall be <1.0 mg/L with any TRC <0.6 mg/L considered a system failure. Monitoring at numerous STPshas concluded that a TRC residual of 1.0 mg/L is an adequate indicator of compliance with the E. coli criteria. E. coli limits aredefined in this section as well as monitoring requirements to take effect should an alternate means ofdisinfection be used.

9VAC25-31-190. L.4. C. requires an arithmetic mean for measurement averaging and 9VAC25-31-220. D requires limits beimposed where a discharge has a reasonable potential to cause or contribute to an in-stream excursion of water quality criteria.Specific analytical methodologies for toxics are listed in this permit section as well as quantification levels (QLs) necessary todemonstrate compliance with applicable permit limitations or for use in fuhire evaluations to determine if the pollutant hasreasonable potential to cause or contribute to a violation. Required averaging methodologies are also specified.

21. Other Special Conditions:

a. 95% Capacity Reopener. The VPDES Permit Regulation at 9VAC25-31-200.B.4 requires all publicly owned treatmentworks (POTWs) and privately owned treatment works (PVOTWs) develop and submit a plan of action to DEQ when themonthly average influent flow to their sewage treatment plant reaches 95% or more of the design capacity authorized in thepermit for each month of any three consecutive month period. This facility is a PVOTW.

b. O&M Manual Requirement. Required by Code of Virginia §62. 1-44. 19; Sewage Collection and Treatment Regulations,9VAC25-790; and the VPDES Permit Regulation, 9VAC25-31-190.E. The permittee shall maintain a current Operations andMaintenance (O&M) Manual. The permittee shall operate the treatment works in accordance with the O&M Manual andshall make the O&M Manual available to Department personnel for review upon request. Any changes in the practices andprocedures followed by the permittee shall be documented in the O&M Manual within 90 days of the effective date of thechanges. Non-compliance with the O&M Manual shall be deemed a violation of the permit.

c. CTC, CTO Requirement. The Code of Virginia § 62. 1-44. 19; Sewage Collection and Treatment Regulations, 9VAC25-790requires that all treatment works treating wastewater obtain a Certificate to Construct (CTC) prior to commencingconstruction and to obtain a Certificate to Operate (CTO) prior to commencing operation of the treatment works.

d. Licensed Operator Requirement. The Code of Virginia at §54.1-2300 et seq. and the VPDES Permit Regulation at9VAC25-31-200 C, and by the Board for Waterworks and Wastewater Works Operators (18VAC160-30 et seq. ) and OnsiteSewage System Professionals Regulations (18VAC 160-40 et seq.) requires licensure of operators. This facility requires aClass IV operator.

e. Reliability Class. The Sewage Collection and Treatment Regulations at 9VAC25-790 require sewage treatment works toachieve a certain level of reliability in order to protect water quality and public health consequences in the event ofcomponent or system failure. Reliability means a measure of the ability of the treatment works to perform its designatedfunction without failure or interruption of service. The facility is required to meet a reliability Class of I. The facility isrequired to meet a reliability Class of I based on the effluent location and human health concerns.

f. Sludge Reopener. The VPDES Permit Regulation at 9VAC25-31-220.C requires all permits issued to treatment workstreating domestic sewage (including sludge-only facilities) include a reopeaer clause allowing incorporation of any applicablestandard for sewage sludge use or disposal promulgated under Section 405(d) of the Clean Water Act (CWA). The facilityincludes a sewage treatment works.

g. Sludge Use and Disposal. The VPDES Permit Regulation at 9VAC25-31-100. P; 220.B.2, and 420 through 720, and 40 CFRPart 503 require all treatment works treating domestic sewage to submit mfonnation on their sludge use and disposalpractices and to meet specified standards for sludge use and disposal. The facility includes a treatment works treatingdomestic sewage.

h. TMDL Reopener. This special condition is to allow the permit to be reopened if necessary to bring it into compliance with

VPDES PERMIT PROGRAM FACT SHEET

any applicable TMDL that may be developed and approved for the receiving stream.

VA0089630PAGE 11 of 12

i. Nutrient Reopener. 9VAC25-40-70 A authorizes DEQ to include technology-based annual concentration limits in thepermits of facilities that have installed nutrient control equipment, whether by new construction, expansion or upgrade.9VAC25-31-390 A authorizes DEQ to modify VPDES permits to promulgate amended water quality standards.

22. Permit Section Part II.

Required by VPDES Regulation 9VAC25-3 1 -190, Part II of the permit contains standard conditions that appear in all VPDESPermits. In general, these standard conditions address the responsibilities of the permittee, reporting requirements, testingprocedures and records retention.

23. Changes to the Permit from the Previously Issued Permit:

a. Special Conditions: No changes made.

b. Monitoring and Efflueat Limitations: Monitoring for Nitrites + Nitrates, Total Kjeldahl Nitrogen and Total Nitrogen was addedto the permit.

24. Variances/Alternate Limits or Conditions: Not Applicable.

25. Public Notice Information:

First Public Notice Date: August 24, 2018 Second Public Notice Date: August 31, 2018

Public Notice Information is required by 9VAC25-31-280 B. All pertinent information is on file and may be inspected, andcopied by contacting the: DEQ Northern Regional Office, 13901 Crown Court, Woodbridge, VA 22193, Telephone No. (703)583-3805, ann. zimmerman@deq. vu-ginia. gov. See Attachment 12 for a copy of the public notice document.

Persons may comment in writing or by email to the DEQ on the proposed permit action, and may request a public hearing, duringthe comment period. Comments shall include the name, address, and telephone number of the writer and of all personsrepresented by the commenter/requester, and shall contain a complete, concise statement of the factual basis for comments. Onlythose comments received within this period will be considered. The DEQ may decide to hold a public hearing, including anothercomment period, if public response is significant and there are substantial, disputed issues relevant to the permit. Requests forpublic hearings shall state 1) the reason why a hearing is requested; 2) a brief, informal statement regarding the nature and extentof the interest of the requester or of those represented by the requester, includmg how and to what extent such interest would bedirectly and adversely affected by the permit; and 3) specific references, where possible, to terms and conditions of the permitwith suggested revisions. Following the comment period, the Board will make a determination regarding the proposed permitaction. This determination will become effective, unless the DEQ grants a public hearing. Due notice of any public hearing willbe given. The public may request an electronic copy of the draft permit and fact sheet or review the draft permit and applicationat the DEQ Northern Regional Office by appointment.

26. Additional Comments:

Historical Note - Development of the Policy for the Potomac River Embayments (9VAC25-415 et seq.):

The State Water Control Board adopted the Potomac Embayment Standards (PES) in 1971 to address serious nutrient enrichmentproblems evident m the Virginia embayments and Potomac River at the time. These standards applied to sewage treatment plantsdischarging into Potomac River embayments in Virginia and for expansions of existing plants discharging into the non-tidaltributaries of these embayments. The standards applied effluent limitations for BOD, unoxidized nitrogen, total phosphoms, andtotal nitrogen:

Parameter

BODsUnoxidized NitrogenTotal PhosphomsTotal Nitrogen

PES Standard (monthly average)3mg/L1 mg/L (April - October)0.2 mg/L8 mg/L (when technology is available)


Questions also arose due to the fact that the PES were blanket effluent limitations that applied equally to differentbodies of water. Therefore, in 1978, the State Water Control Board committed to reevaluate the PES. In 1984, amajor milestone was reached when the Virginia Institute of Marine Science (VIMS) completed state-of-the-art modelsfor each of the embayments. The Board then selected the Northern Virginia Planning District Commission (NVPDC)to conduct wasteload allocation studies of the Virginia embayments using the VIMS models. In 1988, these studieswere completed and effluent limits that would protect the embayments and the main stem of the Potomac River weredeveloped for each major facility.

In 1991 and 1992, several Northern Virginia jurisdictions with embayment treatment plants submitted a petition to theBoard requesting that the Board address the results of the VIMS/NVPDC studies. Their petition requested revisedeffluent limitations and a defined modeling process for determining effluent limitations.

The recommendations in the petition were designed to protect the extra sensitive nature of the embayments along withthe Potomac River that have become a popular recreational resource during recent years. The petition includedrequirements more stringent than would be applied using the results of the modeling/allocation work conducted in the1980s. With the inherent uncertainty of modeling, the petitioners question whether the results of modeling wouldprovide sufficient protection for the embayments. By this petition, the local governments asked for continued specialprotection for the embayments based upon a management approach that uses stringent effluent limits. They believedthis approach had proven successful over the past two decades. In addition, the petition included a modeling processthat would be used to determine if more stringent limits would be needed m the future due to increased wastewaterdischarges.

The State Water Control Board adopted the petition, with revisions, as a regulation on September 12, 1996. Theregulation is entitled Policy for the Potomac River Embayments (9 VAC25-415 et seq.). On the same date, the Boardrepealed the old PES. The new regulation became effective on April 3, 1997, and contained the following effluentlimits:

ParametercBOD5

TSSTotal PhosphomsAmmonia as Nitrogen

PES Standard (monthly average)5mg/L6mg/L0. 18 mg/Ll. Omg/L

Previous Board Action(s): Notice of Violation No. W2016-08-N-0009 was issued to Mr. and Mrs. Walk on August 22, 2016, forpermit limit exceedances during the April through June 2016 monitorfng period. Notice of Violation No. W2017-02-N-0007 wasissued to Mr. and Mrs. Walk on February 16, 2017, for permit limit exceedances during the October through December 2016monitoring period, and NOV No. W2017-05-N-0008 was issued on May 25, 2017 for the permit limit exceedances during theJanuary through March 2017 monitoring period. A Consent Order was executed to resolve compliance issues associated with theWalk Residence Sewage Treatment Plant. The effective date of the Order is January 26, 2018.

Staff Comments: None.

Public Comment: No comments were received during the public notice.

Walk Residence Sewage Treatment Plant (VA0089630)

Fact Sheet Attachments:

Attachment 1 - Flow Frequency Determination Memo

Attachment 2 - Process Flow Diagram

Attachment 3 - Topographic Map

Attachment 4 - Site Inspection / Technical Report

Attachment 5 - Planning Statement

Attachment 6 - Water Quality Criteria/Wasteload Allocation Analysis (MSTRANTI Spreadsheet)

Attachment 7 - Summary of Effluent Data from Discharge Monitoring Reports (DMRs) and pH Data

Attachment 8 - Monitoring Station Data

Attachment 9 - VAFWIS - DGIF

Attachment 10 - 1998 Ammonia Calculation

Attachment 11 - STATS for Chlorine and Ammonia

Attachment 12 - Public Notice

Attachment 1

Flow Frequency Determination Memo

MEMORANDUM

DEPARTMENT OF ENVIRONMENTAL QUALITY - WATER DIVISIONWater Quality AsBesements and Planning

629 B. Main Street P. O. Box 10009 Richmond, Virginia 23240

SUBJECT: Flow Frequency DeterminationRandall STP - #VA0089630

TO» M. Sue Heddings, NRO

FROM: Paul E Herman, P. E., WQAP

DATE; November 6, 1997

COPIES: Ron Gregory, Charles Martin, File

The Randall STP discharges to the Accokeek Creek nearStafford, VA. Stream flow frequencies are required at this siteby the permit writer for the purpose of calculating effluentlimitations for the VPDES permit.

The USGS conducted several flow measurements on the AccokeekCreek from 1980 to 1983. The measurements were made at the Route609 bridge near Brooke, VA. The measurements made by the USGScorrelated very well with the same day daily mean values fromthree continuous record gages; one on the Accotink Creek nearAnnandale, VA #01654000, one on the St. Clements Creek nearClements, MD #01661050, and one on the Beaverdam Swamp near Ark,VA #01670000. The measurements and daily mean values for eachgage were plotted by the USGS on a logarithmic graph and a bestfit line was drawn through the data points. The required flowfrequencies from the reference gages were plotted on theircorresponding regression lines and the associated flowfrequencies at the measurement site were determined from thegraph. The flow value for the measurement site represents anaverage of the values for each gage.

The flow frequencies at the discharge point were determinedby using the values at the measurement site and adjusting them byproportional drainage areas. The data for the reference gages,the measurement site and the discharge point are presented below:

Accotink Creek near Auaandale, VA (#01654000)»

Drainage Area = 23. 5 mi2

Attachment 1

1Q10 » 0. 24 Cfs7Q10 =0. 51 Cfs30Q5 =2. 5 Cfs

High Flow 1Q10 = 3 7 cfsHigh Flow 7Q10 =4. 5 cfs

HM = 6. 1 Cfs

St. Clements Creek near Cleaaents, MD (#01661050);

1Q107Q1030Q5

Drainage Area "18. 5 mi2

0. 0 cfs High Flow 1Q10 » 1. 8 cfs0. 0 cis High Flow 7Q10 =2. 5 cfs0. 35 cis HM = 0. 0 cfs

Beaverdaro Swamp near Ark, VA (#01670000):

Drainage Area =6. 63 mi2

1Q10 =0. 0 cis High Flow 1Q107Q10 =0. 01 cis High Flow 7Q1030Q5 =0. 33 Cfs HM

Accokeek Creek at Route 609 nearBrooke, VA (#01660670)s

Drainage Area =18. 0 mi2

1Q10 =0. 0 cfs High Flow 1Q107Q10 =0. 0 cfs High Flow 7Q1030Q5 =0. 55 cfs HM

Accokeek Creek at discharge point:

1Q107Q1030Q5

Drainage Area = 0. 54 mi2

0. 0 cfs High Flow 1Q100. 0 cfs High Flow 7Q100. 017 cfs HM

0. 75 Cfs0. 99 cis0. 0 Cfs

0. 86 cfs1. 0 cfs0. 0 cfs

0. 026 cfs0. 030 cfs0. 0 Cfs

The high flow months are December through MayThis analysis assumes there are no significant discharges,

withdrawals or springs influencing the flow in the Accokeek Creekupstream of the discharge point.

If there are any questions concerning this analysis, pleaselet me know

1-2.1^C2^. c&. *-. :><s. o? -^<- ^&<-^ &i~noi. U ct'w. '"o. <, & &. re<^ 0-S4 f^<SrrÛ^. ^c^L-tJI ^tô,

1 6. 0-AO c^ , ^ ^. ^/ S^ loelE^

cb. ^ <:LeoA^ ^t^ .^- 4ûo S'^- ^ ^ --^'^^b

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Attachment 2

Process Flow Diagram

g.M

-0-0-D-O-^(? & ?

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Attachment 3

Topographic Map

Topographic Map showing location ofOutfall.

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Attachment 4

Site Inspection / Technica Report

Molly Joseph WardSecretary of Natural Resources

"ve^y""

COMMONWEALTH of VIRGINIADEPARTMENT OF ENVIRONMENTAL QUALITY

NORTHERN REGIONAL OFFICE13901 Crown Court, Woodbridge, Virginia 22193

(703) 583-3800www.deq. virginia. gov

October 25, 2017

David K. PaylorDirector

Thomas A. Faha

Regional Director

Mr. Robert and Ms. Angela Walk50 Randall RoadStafford, VA 22554

Re: Walk Residence Sewage Treatment Plant, Permit # VA0089630

Dear Mr. and Ms. Walk:

Attached is a copy of the inspection report generated from the Technical/Laboratory Inspection conductedat the subject facility on September 27, 2017.

Please review the enclosed report and submit in writing adequate documentation of all measurestaken (Including all necessary supporting documentation) to address the Request for CorrectiveAction Section no later than November 22, 2017. This letter is not intended as a case decision under theVirginia Administrative Process Act, Va. Code § 2.2-4000 et seq. (APA). Additional inspections may beconducted to confirm that the facility is in compliance with permit requirements.

If you have any questions or comments concerning this report, please feel free to contact me at theNorthern Regional Office at 703-583-3905 or [email protected].

Respectfully,

^'^^5,

Amy E. DooleyEnvironmental Specialist II

Electronic copy sent:

Permits/DMR File, Compliance Manager, Compliance Auditor, Enforcement DEQ

DEQWASTEWATER FACILITY INSPECTION REPORT

PREFACE

VPDES/State Certification No. (RE) Issuance Date Amendment Date Expiration Date

VA0089630 April 25, 2013 April 24, 2018

Facility Name Address Telephone Number

Walk Residence Sewage Treatment Plant 50 Randall Road, Stafford, VA 22554 540-659-7289

Owner Name Address Telephone Number

Robert D. and Angela S. Walk 50 Randall Road, Stafford, VA 22554 540-659-7289

Responsible Official Title Telephone Number

Robert D. and Angela S. Walk Owner 540-659-7289

Responsible Operator Operator Cert. Class/number Telephone Number

Doug Crooks Class I/1965004241 540-840-0192

TYPE OF FACILHY:

DOMESTIC INDUSTRIAL

Federal Major Major Primary

Non-federal x Minor Minor Secondary

INFLUENT CHARACTERISTICS: DESIGN:

Flow 0.008 MGD

Population Served 1SFH

Connections Served

EFFLUENT LIMITS: (mg/L unless noted)

Parameter Min. Mthly/WklyAvg. Max. Parameter Min. Mthly/WklyAvg. Max.

pH (S.U.) 6.0 9.0 cBODs 5/8

TSS 6.0/9.0 Ammonia (Apr- Oct) 1.0/1.5

DO 5.0 Ammonia (Nov - Mar) 3. 1/3.1

E. coli (n/lOOmLs) 126 Total Phosphorus 0. 18/0.27

TRC (after contact tank) 1.0 TRC (after dechlorination) 0.016/0.016

Receiving Stream Accokeek, UT

Basin Potomac River

Discharge Point (LAT/LONG) 38° 26'49"N/ 77° 28' 06" W

Revised: 06-2011

Vi rainia Department of Environmental Quality

WASTEWATER FACILITY INSPECTION REPORT

FACILITY NAME: Walk Residence SewageTreatment Plant

INSPECTION DATE: September 27, 2017INSPECTOR Amy Dooley

PERMIT No.: VA0089630 REPORT DATE: October 11, 2017TYPE OFFACILITY:

EMunicipal

D Industrial

D Federal

13 Small Minor TIME OF INSPECTION:

TOTAL TIME SPENT

Arrival915

Departure1100

19hrs.

PHOTOGRAPHS: 0 Yes D No UNANNOUNCEDINSPECTION?

D Yes El No

REVIEWED BY/Date : ^^^- 10/24/17

PRESENT DURING INSPECTION: Tim Jenkins (WasteMasters)

TECHNICAL INSPECTION1. Has there been any new construction?

. If so, were plans and specifications approved?Comments:

D Yes E No

2. Is the Operations and Maintenance Manual approved and up-to-date?Comments: Need to update manual to reflect current permit (permit and limits).

D Yes E No

3. Are the Permit and/or Operation and Maintenance Manual specified licensed operatorbeing met?

Comments: The facility is managed by a Class I licensed operator.El Yes D No

4. Are the Permit and/or Operation and Maintenance Manual specified operator staffingrequirements being met?

Comments:13 Yes D No

5. Is there an established and adequate program for training personnel?Comments: NA

D Yes D No

6. Are preventive maintenance task schedules being met?Comments:

0 Yes D No

7. Does the plant experience any organic or hydraulic overloading?Comments:

D Yes E No

8. Has there been any bypassing or overflows since the last inspection?Comments:

D Yes 13 No

9. Is the standby generator (including power transfer switch) operational and exercisedregularly?

Comments: No generator at facility. The home is on a private well. If power should goout, the wells would cease pumping and therefore no flow to plant. The facility also haspump tanks that are large enough to hold a number of days.

D Yes D No

10. Is the plant alarm system operational and tested regularly?Comments:

E Yes D No

VA DEQ Wastewater Facility Inspection ReportPermit # VA0089630

TECHNICAL INSPECTION11. Is sludge disposed of in accordance with the approved sludge management plan?

Comments: Measure septic and multiflow. Pump and haul to Massaponax WWTP byWheeler Septic Services when needed.

0 Yes D No

12. Is septage received?. If so, is septage loading controlled, and are appropriate records maintained?

Comments:D Yes 13 No

13. Are all plant records (operational logs, equipment maintenance, industrial wastecontributors, sampling and testing) available for review and are records adequate?

Comments:

El Yes D No

14. Which of the following records does the plant maintain?El Operational logs 13 Instrument maintenance & calibration

0 Mechanical equipment maintenance D Industrial waste contribution (Municipal facilities)

Comments:

15. What does the operational log contain?D Visual observations 13 Flow measurement D Laboratory results 13 Process adjustments

D Control calculations D Other (specify):

Comments: Work orders are prepared to indicate process adjustments and water compliance field samplingparameters (DO, TRC, and pH).

16. What do the mechanical equipment records contain?D As built plans and specs D Manufacturer's instructions D Lubrication schedules

D Spare parts inventory

a Other (specify):

D Equipment/parts suppliers

Comments: Mechanical equipment is inspected and maintained by Wastemasters. Work orders arc prepared toindicate what was inspected and what maintenance was completed and water compliance fieldsampling parameters (DO, TRC, and pH).

17. What do the industrial waste contribution records contain (Municipal only)?D Waste characteristics D Impact on plant D Locations and discharge types

D Other (specify)

Comments: NA

18. Which of the following records are kept at the plant and available to personnel?D Equipment maintenance records D Operational log D Industrial contributor records

D Instrumentation records

Comments:

D Sampling and testing records

19. List records not normally available to plant personnel and their location:Comments: Records are maintained by the contracted operator.

20. Are the records maintained for the required time period (three or five years)?Comments:

13 Yes D No


UNIT PROCESS EVALUATION SUMMARY SHEET

UNIT PROCESS PROBLEMS* COMMENTSSeptic Tank and Sand Filter The facility has both a septic tank and dosing tank that

supply two sand filters. Quarterly maintenanceconducted.

Filtration A multi-flow system is wed as aphosphorus removalsystem.

Chlorination/Dechlorination Single feeder box for each with a contact tank locatedbetween them.

Post Aeration Small aerator installed in sampling box to aerate prior todischarging out the outfall.

Plant Outfall Was not discharging at time of inspection.

* Problem Codes1. Unit Needs Attention2. Abnormal Influent/Effluent

3. Evidence of Equipment Failure

4. Unapproved Modification or Temporary Repair5. Evidence of Process Upset6. Other (explain in comments)

INSPECTION OVERVIEW AND CONDITION OF TREATMENT UNITS

The treatment plant is designed to service several single family homes. However, the facility is currently onlyservicing one.

The plant consists of one septic tank, two dosing tanks, two sand filters, one multiflow system, andchlorination/dechlorination. (Photo 1)

Septic Tank: Current residence has one septic tank that collects the solids and is pumped as needed.

Dosing Tank: Two sequential dosing tanks are utilized prior to flowing into the sand filters. (Photo 2)

Sand Filters: One sand filter is put online at a time and switched quarterly or as needed. The filter affluent is thenproportionately recirculated back to the sand filters and circulated to the multiflow system. (Photo 3)

Multiflow: The system is being utilized for phosphorus treatment and not as an activated sludge system. Polymer(Delpak) is being added to the multiflow influent for phosphorus removal. (Photo 4)

Chlorination and Dechlorination: The multiflow effluent flows through a chlorine tablet feeder box and into achlorine contact tank. The effluent then flows through a dechlorination tablet feeder box. (Photos 5 and 6)

Post Aeration and Plant Outfall: A small aeration pump is installed in the sample collection area, which is designedto increase the DO after dechlorination. The effluent is then discharged through the outfall into the receiving stream.(Photos 7 and 8)

EFFLUENT FIELD DATA: (not discharging at time of inspection)

Flow MOD Dissolved Oxygen mg/L TRC (Contact Tank) mg/L

pH s.u. Temperature TRC (Final Effluent) mg/L

Was a Sampling Inspection conducted? D Yes (see Sampling Inspection Report) E No


CONDITION OF OUTFALL AND EFFLUENT CHARACTEMSTICS:

1. Typeofoutfall: 13 Shore based D Submerged Diffuser? D Yes D No2. Are the outfall and supporting structures in good condition? EtYes D No3. Final Effluent (evidence of following problems): D Sludge bar D Grease

D Turbid effluent D Visible foam D Unusual color D Oilsheen

4. Is there a visible effluent plume in the receiving stream? D Yes El No5. Receiving stream: E No observed problems D Indication of problems (explain below)

Comments: Plant was not discharging at the time of inspection.

REQUEST for CORRECTIVE ACTION:

Part I.C.2. states "The permittee shall maintain a current Operations and Maintenance CO&M) Manual for thetreatment works... " During the inspection, it appeared that the O&M Manual was outdated and did not reflect thecurrent permit information. Provide a narrative, including timeline, to DEQ by November 22, 2017 indicatinghow the facility plans to address this issue.

NOTES and COMMENTS:

The contracted/licensed operators keep a log book regarding maintenance activities conducted by them onsite.However, the homeowners maintain records as well of maintenance conducted by them. The homeowner's recordsdo not contain the year on which the service is conducted and are not within a bound book. DEQ recommends thatthe homeowner include the year in the maintenance entries and utilize a bound book.

^

3) One of two sand filters. 4) Multiflow system for phosphorus removal.

Facility name: Walk Residence STPSite Inspection Date: September 27, 2017

VPDES Permit No. VAOOPhotos & Layout by: Amy Dooley

Page 1 of 2

;f ̂ ^

Facility name: Walk Residence STPSite Inspection Date: September 27, 2017

VPDES Permit No. VAOO

Photos & Layout by: Amy DooleyPage 2 of 2

DEPARTMENT OF ENVIRONMENTAL QUALITY - WATER DIVISIONLABORATORY INSPECTION REPORT

11/2014

PERMIT #:VA0089630

INSPECTION DATE:September 27, 2017

PREVIOUS INSP. DATE:August 28, 2007

PREVIOUS EVALUATION:No deficiencies

TIME SPENT:2hrs.

NAME/ADDRESS OF FACILITY:Walk Residence Sewage TreatmentPlant50 Randall RoadFredericksburg, VA

FACILITY CLASS:D MAJOR

D MINOR

E MINOR (Small)

D VPA

FACILITY TYPE:E MUNICIPAL

a

D

INDUSTRIAL

FEDERAL

UNANNOUNCEDINSPECTION?

D YES0 NOFFY-SCHEDULED

INSPECTION?13 YESD NO

INSPECTOR(S):Amy Dooley

REVIEWER(S):

^^. ^^-

PRESENT AT INSPECTION:Tim Jenkins (Wastemasters)

LABORATORY EVALUATION DEFICIENCIES?

Yes No

LABORATORY RECORDS a 13

GENERAL SAMPLING AND ANALYSIS D 13

pH PROCEDURE D El

TOTAL RESIDUAL CHLORINE PROCEDURE a 0

DISSOLVED OXYGEN PROCEDURES a E

VELAP CERTIFICATION (on site Environmental Laboratory) Yes No NA

Does the laboratory have VELAP certification (interim or final)?

Document the laboratory's VELAP laboratory number:

Document the effective date of the VELAP certification:D a 13

Document the expiration date of the VELAP certification:

List the certified parameters:

VELAP ACCREDITATION (Commercial Environmental Laboratory) Yes No

IS A VELAP ACCREDITED LAB USED FOR OTHER PERMIT REQUIRED ANALYSES?VELAP#, LAB NAME, ADDRESS and LIST PARAMETERS:

VELAP #460032

LAB NAME

EnviroCompliance Laboratories,Inc.

10357 Old Keeton RoadAshland, VA 23005

PARAMETERS

Ammonia, E.coli, TSS, Phosphorus,CBODs

13 n

IF PERMIT REQUIRED SAMPLE ANALYSIS IS PERFORMED AT ANOTHERLOCATION, ARE SHIPPING PROCEDURES ADEQUATE?

E D

COPIES: D DEQ - RO; E Owner, D Other:

PERMIT #: VA0089630

LABORATORY RECORDS SECTION

LABORATORY RECORDS INCLUDE THE FOLLOWING:

ANALYSIS DATEEl

0

E

SAMPLING DATE

SAMPLING TIME

SAMPLE LOCATION

El

E

13

ANALYSIS TIME

TEST METHOD

D

a

D

E

CONT MONITORING CHART

INSTRUMENT CALIBRATION

INSTRUMENT MAINTENANCE

CERTIFICATE OF ANALYSIS

WRITTEN INSTRUCTIONS INCLUDE THE FOLLOWING:

CALCULATIONSD SAMPLING SCHEDULES a D ANALYSIS PROCEDURES

YES NO N/A

DO ALL ANALYSTS INITIAL THEIR WORK? El D D

DO BENCH SHEETS (or LOG BOOK) INCLUDE ALL INFORMATION NECESSARY TODETERMINE RESULTS?

El D a

IS THE DMR COMPLETE AND CORRECT? LIST MONTH(S) REVIEWED: 1st quarter 2017,2nd quarter 2016, 3rd quarter 2015, 4th quarter 2014

13 D a

ARE ALL MONITORING VALUES REQUIRED BY THE PERMIT REPORTED? 0 a a

DOES CHAIN OF CUSTODY DOCUMENT PROPER SAMPLE PRESERVATION WAS MET? 13 a a

WHEN THE CERTIFICATE OF ANALYSIS CONTAINS FLAGGED DATA IS THE -FLAG'REPORTED ON THE DMR?

El a a

GENERAL SAMPLING AND ANALYSIS SECTION

YES NO N/A

ARE SAMPLE LOCATIONS ACCORDING TO PERMIT REQUIREMENTS? El a a

ARE PERMIT REQUIRED SAMPLE COLLECTION PROCEDURES APPROPRIATE? El a D

ARE EFFLUENT SAMPLES REPRESENTATIVE OF THE MONITORED ACTIVITY? El D D

ARE PERMIT REQUIRED COMPOSITE SAMPLES FLOW PROPORTIONAL? NOTE: Equalvolume composite aliquots are acceptable if the instantaneous flow is within ± 10% of thedaily average flow during the monitorinci period. Some permits specify how the compositeis to be taken (e. g., 5G/8HC).

D D 13

IS COLLECTION SAMPLE EQUIPMENT ADEQUATE? 13 a a

IS FLOW MEASUREMENT ACCORDING TO PERMIT REQUIREMENTS? El D a

Page 2 of 3

DEPARTMENT OF ENVIRONMENTAL QUALITY - WATER DIVISIONLABORATORY INSPECTION REPORT SUMMARY

FACILITY NAME: Walk Residence STP Permit #: VA0089630 INSPECTIONDATE:

September 27, 2017

LABORATORY EVALUATION No required actions at this time

D REQUIRED CORRECTIVE ACTION(s) IDENTIFIED

SUMMARY of REQUEST FOR CORRECTIVE ACTION

Lab Records

Laboratory Records section deficiency and required action:None

General Sampling and Analysis

General Sampling and Analysis section deficiency and required action:None

pH Analysis

pH deficiency and required action:None

TRC Analysis

TRC deficiency and required action:None

D.O. Analysis

D.O. deficiency and required action:None

OTHER - Comments or Observations

None

Page 3 of 3

ANALYST: Tim Jenkins VPDES NO VA0089630

Meter: YSI PR01020

METHOD OF ANALYSIS:

Parameter: Hydrogen Ion (pH)Method: Electrometric

3/2015

E

D

21st Edition of Standard Methods (SM 21) - 4500-H+ B-2000 (SM 21 pH)

22nd Edition of Standard Methods (SM 22), or Online Editions of Standard Methods - 4500-H+ B-2011 (SM 22 pH)

pH is a method-defined analyte so modifications are not allowed. [40 CFRPart 136. 6]

1) Isa certificate of operator competence or initial demonstration of capability available for eachanalvst/operator performing this analysis? NOTE: Analyze 4 samples of known pH; you may usean external source of buffers or other known standards (different tot/manufacturer than buffersused to calibrate meter). Recovery for each of the 4 samples must be +/- 0.2 SU of the knownconcentration of the sample or within "Acceptable Range" specified by the PT provider. [SM1020B.1] NOTE: The same pH buffer [values] used for calibration of the instrument canbe used as LCS if from a different source or different lot.

2) IF a replicate sample is analyzed is there a written procedure for which result will be reported onDMR (Sample or Replicate) and is this procedure being followed? [DEQ - based on EPA GoodLaboratory Practices Standards]

3) Is a Laboratory Control Sample (LCS) tested at least annually and are results within acceptancecriteria? [SM 21 B.2 or SM 22 1020 B.3.] NOTE: LCS should be a purchased Proficiency Test(PT) sample or a different buffer other than ones used for calibration of the meter [with a ±0.2SU acceptance range or within "Acceptable Range" specified by the PT provider].. NOTE:Thesame pH buffer [values] used for calibration of the instrument can be used as LCS rffrom a different source or different lot.

0

N

a

NA

13 D

Is the electrode in good condition (no chloride precipitate, scratches, deterioration, etc. )? [SM21 pH or SM 22 pH 2. b./c. and 5. b.]

5) Is electrode storage solution in accordance with manufacturer's instructions? [SM 21 pH or SM22 pH A.a. and Mfr.]

6) Is meter calibrated on at least a daily basis using three buffers all of which are at the sametemperature? [SM 21 pH or SM 22 pH 4. a. ] NOTE: Start with Buffer 7 unless manufacturer'sinstructions state otherwise. [NOTE: If meter is not capable of 3 buffer calibration use 2 buffersbracketing the expected sample pH and then measures 3rd buffer (the measurement valuerecorded must be ±0. 1 SU), and then reread and record value of buffer 7 to ensure ±0. 1 SU.]

7) After calibration, is a buffer analyzed as a check sample to verify that calibration is correct?Verification measurement should be within +/- 0. 1 SU. [SM 21 1020 B 10. c. or SM 22 1020 B11.C.]

8) Is calibration verification measurement repeated with every 10 samples and at the end of a seriesof samples? Verification measurement should be within +/- 0. 1 SU. [SM 21 pH or SM 22 pH4020 B 2. b.] NOTE: Not applicable if pH meter is calibrated before taking any measurement(e.g., if operator monitors daily pH at more than one facility and calibrates before eachmeasurement).

9) Do the buffer solutions appear to be free of contamination or growths? [SM 21 pH or SM 22 pH3. a.]

0) Are buffer solutions within the listed shelf-life or have they been prepared within the last 4 weeks?[SM 21 pH or SM 22 pH 3. a.]

Page 1 of 2

pH - Electrometric

E D

0 D

E D

E a

NA

13

0

D

a

11) Is the cap or sleeve covering the access hole on the reference electrode removed whenmeasuring phi? [Mfr.]

12) Is sample analyzed within 15 minutes of collections? [40 CFR Part 136]

13) Is the electrode rinsed and then blotted dry between reading solutions (Disregard if a portion ofthe next sample analyzed is used as the rinsing solution. )? [SM 21 pH or SM 22 pH 4.a and 4. b]

14) Is the sample stirred gently at a constant speed during measurement? [SM 21 pH or SM 22 pH4. b.]

15) Does the meter hold a steady reading after reaching equilibrium? [4. b.]

See Below

Conducted insitu

E D

Conductedin situ

See Below

PROBLEMS/COMMENTS:The facility was not discharging at the time of inspection.

Page 2 of 2

pH Electrometric

ANALYST: Tim Jen kins VPDES NO. VA0089630

METHOD OF ANALYSIS:

Parameter: Total Residual Chlorine (TRC)Method: DPD Colorimetric (HACH Pocket and Pocket II Colorimeter)

11/2014

Instrument: Pocket Cholorimeter

D

13

D

HACH Manufacturer's Instructions (Method 8167) plus an edition of Standard Methods

21st Edition of Standard Methods 4500-CI G-2000 (SM 21 Cl)

22na Edition of Standard Methods 4500-CI G-2011 (SM 22 Cl)

1) Is a certificate of operator competence or initial demonstration of capability available for eachanalvst/operator performing this analysis? NOTE: Analyze 4 samples of known TRC. Must use a lotnumber or source that is different from that used to prepare calibration standards. May not useSpec^ T. Acceptance range is 70-130% recovery and 20% Relative Standard Deviation (RSD)orwithin PT specified acceptance range and 20% RSD. [SM 1 020 B. 1]

2) Is calibration curve verification checked daily using a high and a low standard? NOTE: May usemanufacturer's installed calibration and commercially available chlorine standards, or Spec^/ T, fordaily calibration verifications. [SM 21 1020]

3) IF a replicate sample is analyzed is there a written procedure for which result will be reported on DMR(Sample or Replicate) and is this procedure being followed? [DEQ - based on EPA Good LaboratoryPractices Standards]

4) Is a Laboratory Control Sample (LCS) tested at least annually and are results within acceptancecriteria? [SM 21 B. 2. or SM 22 1020 B 3. ] NOTE: LCS should be a purchased Proficiency Test (PT)sample or if a known standard different from the calibration standards is used. Use the PTacceptance criteria when given or use 70-130% recovery and 20% Relative Standard Deviation(RSD) as the acceptance criteria.

E

0

a

a

NA

E D

5) Are the DPD Powder Pillows stored in a cool, dry place? [Mfr.]

6) Are the pillows within the manufacturer's expiration date? [Mfr.]

7 Are pillows appropriate for the sample size being analyzed and for Total Residual Chlorine

8) Has buffering capability of DPD pillows been checked annually? (Pillows should adjust sample pH tobetween 6 and 7) [Mfr.]

9) When pH adjustment is required, is N2804 or NaOH used? [Hach 11. 3. 1]

10) Are cells clean and in good condition? [Mfr]

11) Is the Hach colorimeter program set to measure "TRC, mg/L"? [Mfr.]

12) Is the low range (0. 01 mg/L resolution) used for samples containing residuals from 0. mg/L 2. 00mg/L? [Mfr.]

13) Is the 10-mL cell (2. 5-cm diameter) used for samples from 0-2.00 mg/L? [Mfr.]

14) Are samples analyzed within 15 minutes of collection? [40 CFR Part 136]

15) Is meter zeroed correctly using sample for the blank analysis? [Mfr. and SM 21 1020B. 4. or SM 221020 B. 5. ]]

16) Is the instrument light screen placed correctly on the meter body when the meter is zeroed and whenthe sample is analyzed? [Mfr.]

DPD Colorimetric (Hach Pocket Colorimeters)Page 1 of 2

0 a

0 D

0 D

13 a

D 13

0 a

[3 D

B a

13 D

See Below.

17) Is the DPD Total Chlorine Powder Pillow mixed into the sample? [Hach 11. 1]

18) Is the analysis made at least three minutes but not more than six minutes after Powder Pillowaddition? [Hach 11.2]

19) If read-out exceeds "2. 19 mg/L", is the original sample diluted correctly, and then reanalyzed within 15minutes of the original collection time? [Hach 1.2 & 2. 0]

PROBLEMS/COMMENTS:

The facility was not discharging at the time of inspection.

DPD Colorimetric (Hach Pocket Colorimeters)Page 2 of 2

ANALYST: Tim Jenkins VPDES NO VA0089630

Meter: YSI Pro1020

METHOD OF ANALYSIS:

Parameter: Dissolved OxygenMethod: Membrane Electrode

11/2014

0

D

21st Edition of Standard Methods (SM 21) -4500-0 G-2001 (SM 21 DO),nd22''° of Standard Methods, or Online Editions of Standard Methods (SM 22) -4500-0 G-2011 (SM 22 DO)

Dissolved Oxygen (D.O.) is a method-defined analyte so modifications arenot allowed. [40 CFR Part 136. 6]

1) Is a certificate of operator competence or initial demonstration of capability available for eachanalvst/operator performing this analysis? NOTE: Analyze 4 samples of air-saturated water.Recovery for each of the 4 samples must be +/- 4% of the calculated oxygen saturation for thealtitude/barometric pressure and temperature of the samples. {Alternatively analyze 4 samples ofwater of known concentration (verified by iodometric titration procedure SM 21 or SM 22 4500-0C). Instrument measurements must agree within +/-0. 1 mg/L of verified concentration. } [SM 21orSM221020B. 1and4020B. 1]

2) Are calibration results (mg/L) within ± 4% of the barometric (or altitude) corrected oxygensaturated water value? [SM 21 B.2 or SM 22 1020 B.2.]

N

0 D

D

3) If samples are collected, is collection carried out with a minimum of turbulence and air bubbleformation and is the sample bottle allowed to overflow several times its volume? [SM 21 DO orSM 22 B 3.]

4) Are meter and electrode operable and providing consistent readings? [SM 21 DO G 2. or SM22 DO G 2.]

5) Is membrane in good condition without trapped air bubbles? NOTE: No air bubbles 5 1/8inch (total area of all bubbles). [SM 21 DO G 3.b. or SM 22 DO G 3. b.]

6) Is correct filling solution used in electrode? [Mfr.]

7 Are water droplets shaken off the membrane prior to calibration? [Mfr.]

8) Is meter calibrated before use or at least daily? [Mfr. & SM 21 1020 B 10. a. orSM 102011.a]

9) Is calibration procedure performed according to manufacturer's instructions? [Mfr.]

10) Is sample stirred during analysis (or is there sufficient flow across probe's membrane surface)?[SM 21 DO or SM 22 DO G 3. b. and MfrJ

11) Is the sample analysis procedure performed according to manufacturer's instructions? [Mfr.]

12) Is meter stabilized before reading D.O.? [Mfr.]

13) Is electrode stored according to manufacturer's instructions? [Mfr.]

PROBLEMS/COMMENTS:The facility was not discharging at the time of inspection.

Conductedin situ

E a

0 D

13 D

Dissolved Oxygen - Membrane ElectrodePage 1 of 1

DEPARTMENT OF ENVIRONMENTAL QUALITY - WATER DIVISIONSAMPLE ANALYSIS HOLDING TIME/CONTAINER/PRESERVATION CHECK SHEET

Revised 02/2015 [40 CFR, Part 136. 3, Table II]FACILIT/ NAME: Walk Residence STP VPDES NO VA0089630 DATE: September 27, 2017

HOLDING TIMES [Note: Collection period (for composites) and Sample Collectiontime (end of collection period) must be recorded on the COC.J

SAMPLE CONTAINER PRESERVATION [Note: Preservation is to occur within 15minutes of the end of the collection period.]

PARAMETER APPROVED MET? LOGGED? ADEQ.VOLUME

Y

APPROP.TYPE

APPROVED MET? CHECKED?

pH 15MIN. Conducted in situ Within 15 minutes

CHLORINE 15MIN. Plant was not discharging at time of inspection. Within 15 minutes

DISSOLVED 02 15MIN Conducted in situ Within 15 minutes

BOD5 & CBOD5 48 HOURS

TSS 7 DAYS

FECAL COLIFORM / £. coli/Enterococci

8HRS

AMMONIA 28 DAYS

TOTAL PHOS. 28 DAYS

<6°C s a

&6°C a

<10°C+0.008%NazS203 13 a

DECHLOR<6° C+H2S04 pH<2t 13 a

S6° C+H2S04 pH<2 ia D

s

E]

12

El

El

a

D

a

D

D

PROBLEMS: Note: All chemical preservation should be noted by the Permittee on the Chain of Custody.Holding Times and Preservation References (VELAP except for Field Tests)

DEPARTMENT OF ENVIRONMENTAL QUALITY - WATER DIVISIONEQUIPMENT TEMPERATURE LOG/THERMOMETER VERIFICATION CHECK SHEET

11/2014

FACILITY NAME: Walk Residence STP PERMITNO:

VA0089630 DATE: September 27, 2017

EQUIPMENT

pH METER

D.O. METER

Preservation

Range

±1°C

±rc

In Range?

Yes

El

0

No

InspectorReading

°c

Checked &

LoggedDaily?

Yes No

D

D

PROBLEMS:NIST serial No: 170103556

CorrectIncrement?

Yes No

ANNUAL THERMOMETER VERIFICATION

te the NIST I NIST-Traceable ReferenceThermometer within the manufacturer'sexpiration date or recertified yearly?

DATECHECKED

9/20/17

9/20/17

MARKED

Yes

El

E

No

D

D

OFFSETVALUE1

(Correction)

Yes/No

INSPECTTEMP

23.3

23.3

Offset Value tolerances (reference NIST 105-6): Sampling Refrigerator and Auto Sampler pH and D.O. meters must be within ±2°C (2 times tolerance value). Thermometersmeasuring Outfall permit compliance must be within ±1.0°C (2 times tolerance value).

Equipment Temperature Log and Thermometer Verification

Attachment 5

Planning Statement

To: Ann Zimmerman

From: Rebecca Shoemaker

Date:Subject:

Permit Number:

17-Apr-2018Planning Statement for Walk Residence STPVA0089630

Information for Outfall 001:

Discharge Type: Municipal, minorDischarge Flow: 0.0008 MGDReceiving Stream: Accokeek Creek, UTLatitude / Longitude:Rivermile: 0.22

Streamcode: laXHZ

Waterbody: VAN-A29R6th Order HUC: PL58Water Quality Standards: Class III, Section Ib, special stds. b.Drainage Area: 0.54 sq. mile

1. Please provide water quality monitoring information for the receiving stream segment. If there is notmonitoring information for the receiving stream segment, please provide information on the nearestdownstream monitoring station, including how far downstream the monitoring station is from the outfall.

This facility discharges to an unnamed tributary to Accokeek Creek that has been neither monitored norassessed. The nearest DEQ monitoring station is laACC006.13, which is located at Route 608, approximately 7.8miles downstream of Outfall 001. The following is the water quality summary for this segment of AccokeekCreek, as taken from the 2016 Integrated Report:

C/oss //// Section Ib, special stds. b.

DfQ monitoring stations located in this segment ofAccokeek Creek:. ambient water quality monitoring station laACC006. 13, at Route 608

E. coli monitoring finds a bacterial impairment, resulting in an impaired classification for the recreation use. Abacteria TMDL for the Accokeek Creek watershed has been completed and approved. The aquatic life use isconsidered fully supporting. The wildlife use is considered fully supporting. The fish consumption use was notassessed.

2. Does this facility discharge to a stream segment on the 303(d) list? If yes, please fill out Table A.

No.

Page 1 of 2

3. Are there any downstream 303(d) listed impairments that are relevant to this discharge? If yes, please fillout Table B.

Table B. Information on Downstream 303(d) Impairments and TMDLs

Waterbod

y

Name

ImpairedUse

Cause

YearFirst

Listed as

Impaired

Distance FromOutfall TMDL completed WLA Basis for WLA

Impairment Information in the 2016 Integrated Report

Accokeek

CreekRecreation E. co// 2002

5.2miles

Potomac River

Tributaries inPrince William andStafford Counties

Bacteria TMDL

09/26/2013

1.39E+09

cfu/year E.coli

126cfu/100ml

0.0008 MGD

AccokeekCreek(tidal)

Aquatic LifeDissolved

Oxygen2006

9.7miles

Chesapeake BayTMDL

12/29/2010

This facility is accounted for inthe Chesapeake BayTMDL It

is included intheNPDES

Permit Inventory and is part

of an aggregated WLA forTotal Nitrogen, Total

Phosphorus, and TotalSuspended Solids (Appendix

Q).

4. Is there monitoring or other conditions that Planning/Assessment needs in the permit?

No.

5. Fact Sheet Requirements - Please provide information regarding any drinking water intakes located withina 5 mile radius of the discharge point.

There are two water intakes within a five mile radius of this outfall: Abel Lake (on Potomac Creek) and SmithLake (on Aquia Creek). Neither intake is within the same waterbody as this facility.

Page 2 of 2

Attachment 6

MSTRANTI-OutfalOOl

FRESHWATERWATER QUALIT/ CRITERIA / WASTELOAD ALLOCATION ANALYSIS

Facility Name: Walk Residence Sewage Treatment Plant

Receiving Stream: Accokeek Creek, UT

Permit No. : VA0089630

Version: OWP Guidance Memo 00-2011 (8/24/00)

Stream Information Stream Flows Mixing Information Effluent Information

Mean Hardness (as CaC03) =

90% Temperature (Annual) =

90% Temperature (Wet season) =

90% Maximum pH =

10% Maximum pH =

Tier Designation (1 or 2) =

Public Water Supply (PWS) Y/N? =

Trout Present Y/N? =

Early Life Stages Present Y/N7 =

mg/L

degCdegCsusu

1Q10 (Annual) =

7Q10 (Annual) =

30Q10 (Annual) =1Q10 (Wet season) =30Q10 (Wet season)

30Q5=Harmonic Mean

0 MOD0 MGD

0 MGD0 MGD0 MOD0 MGD

0 MOD

Annual -1Q10Mix=-7Q10M|X=

-30Q10Mix=Wet Season-1Q10 Mix =

-30Q10Mix=

Mean Hardness (as CaC03) =

90% Temp (Annual) =

90% Temp (Wet season) =

90% Maximum pH =

10% Maximum pH=

Discharge Flow =

258 mg/L25 deg C

15 deg C

77SU63SU

0.0008 MQD

Parameter

(ug/1 unless noted)

Background

Cone.

Water Quality Criteria

Acute | Chronic |HH(PWS)| HHWasteload Allocations

Acute ] Chronic |HH(PWS)| HHAntidegradation Baseline

Acute | Chronic |HH(PWS)|Antldegradatlon Allocations

Acute | Chronic | HH (PWS) | HHMost Limiting Allocations

Acute | Chronic | HH (PWS) HH

Method

Target Value

Acenapthene

Acrolein

Acrylonitrlle0

Aldrin cAmmonia-N (mg/1)

(Yearly)Ammonia-N (mg/1)(High Flow)

Anthracene

Antimony

Arsenic

Barium

Benzene c

Benzidlne"

Benzo (a) anthraceneBenzo (b) fluoranthene cBenzo (k) fluoranthene cBenzo (a) pyreneBis2-Chloroelhyl Ether0

Bis2-Chloroisopropyt Ether

Bis 2-Ethylhexyl Phthalate0

Bromofomi c

Butylbenzylphthalate

Cadmium

Carbon Tetrachloride c

Carbaryl

.Chlordane0

IChloride

ITRC

I Chlorobenzene

3.0E+00 3.0E+00

3. 0E+00

1.44E+01 1. 82E+00

1.44E+01 3.47E+00

3. 4E+02 1. 5E+02

a. 5E-01 3. 9E. 01

2. 1E+00 2. 1E+00

2. 4E+00 4. 3E-03

B. 6E+05 2. 3E+05

1. 9E+01 1. 1E+01

9. 9E+029. 3E+00

2. 5E+00

5. 0E-04

4. 0E+04

6. 4E+02

5. 1E+02

2.0E.031. 8E-01

1. 8E-01

1. 8E-01

1. 8E-01

5.3E+006. 5E+04

2.2E+01

1.4E+03

1. 9E+03

1.6E+01

8. 1E-03

1.6E+03

3. 0E+00 3. 0E+OD

3. 0E+00

1. 44E+01 1. 82E+00

1.44E+01 3.47E+00

3.4E+02 1. 5E+02

8. 5E. 01 3. 9E. 01

2. 1E+00

2. 4E+00

8. 6E+05

1. 9E+01

2. 1E+00

4. 3E-03

2. 3E+05

1. 1E+01

9.9E+029. 3E+00

2. 5E+00

5. 0E-04

4. 0E-KM

6. 4E+02

5. 1E+02

2.0E.031. 8E-01

1. 8E-D1

1.8E-01

1. 8E. 01

5. 3E+006. 5E+04

2.2E+01

1. 4E+03

1. 9E+03

1.6E+01

8. 1E-03

1.6E+03

3.0E+00 3. 0E+00

3. 0E4-00

1.44E+01

1. 44E4-01

1. S2E+00

3. 47E+00

8. 5E-01

2. 1E+00

2. 4E+00

8. 6E+05

1.9E+01

2.1E+004. 3E-03

2. 3E*05

1. 1E1-01

9.9E+02

9. 3E+00

2.5E+005. 0E. 04

4.0E+046.4E+02

5. 1E+02

2.0E-031. 8E-01

1.8E.011. 8E-01

1. 8E-01

5. 3E-K)0

6. 5E+04

2.2E*011. 4E+03

1. 9E*03

1.6E+01

8.1E-03

1.6E+03

9. 9E+02

1.2E+00

2. 5E+005. 0E. 04

1. 1E+00

2.1E+00

4. 0E+04

6.4E+029. 0E+01

O. OE+00

5. 1E+022. 0E. 03

1.8E.011. 8E-01

1.8E.011. 8E-01

5. 3E+00

6.5E+042. 2E+01

1.4Et031. 9E<-03

2. 3E-01

1. 6E*01

8. 4E. 01

2.6E.031. 4E1-05

6. GE-KIO

1. 6E1-03

page of 4 Attachment 6_MSTRANTI - Freshwater WLAs 7/25/2018-10:10 AM

Parameter

(ug/1 unless noted)

Background

Cone.


Chronic HH

Wasteload Allocations

Chronic |HH(PWS)| HH

Antidegradation Baseline

Acute | Chronic |HH(PWS)|

Antldegradatlon Allocations

Acute ] Chronic ] HH (PWS) I

Most Limiting Allocations

Chronic | HH (PWS) HH

Method

Target ValueIChlorodlbromomethane

IChlorofonn

IZ-Chloronaphthalene

12-Chlorophenol

Chlorpyrtfos

IChromium III

IChromiumVI

IChromium. Tcrtal

|Chrysene°

I Copper

|Cyanlde, Free

IDDD°DDE°

IDDTC

I Demeton

IDiazinon

lDibenz(a, h)anthracene

1, 2-Dichlorobenzene



3,3-Dichlorobenzldine°

iDichlorobromomethane

1,2-Dichloroethanec

1, 1-Dichloroethylene

1, 2-trans-dichloroethytene

2, 4-Dichlorophenol

2,4-Dichlorophenoxyacetic acid (2, 4-D)

1, 2-Dichloropropanec1,3-DlchloropropenecDiddrin °

Diethyl Phthalate

2, 4-Dimethylphenol

Dimethyl Phthalate

DI-n-Butyl Phthalate

2, 4 Dinitrophenol

2-Melhyl-4,6-Dlnitrophenol2,4-Dinitrotoluene °Dioxin 2,3, 7,8-tetrachlorodibenzo-p-dioxin

1,2-Diphenylhydrazine0

Alpha-Endosulfan

Beta-Endosulfan

Alpha + Beta Endosulfan

Endosulfan Sulfate

Endrin

Endrin Aldehyde

B. 3E-02

1. 9E+02

1. 6E+01

3. 7E+00

2. 2E+01

1. 1E+00

1.7E.01

4. 1E. 02

2. 4E+01

1. 1E+01

2.8E+005. 2E+00

1. 0E-03

1.0E-011. 7E-01

2. 2E-01 5. 6E-02

2. 2E-01 5. 6E-02

2. 2E-01 5. 6E-02

1. 0E+02

3. 8E-02

1. 3E+02

1. 1E+04

1. 6E+03

1.5E+02

1.8E-02

1. 6E+04

3. 1E-03

2. 2E-03

2. 2E-03

i. aE-oi

1. 3E+03

9. 6E+02

1.9E+022. 8E-01

1. 7E+02

3. 7E+02

7. 1E+03

1.0E+042. 9E+02

1. 5E+02

2. 1E+025.4E-04

4.4E+04

8. 5E+02

1. 1E+06

4.5E+035. 3E+03

2. 8E+02

3.4E+01

5. 1E-082. 0E+00

8. 9E+01

8. 9E+01

8. 9E+01

6.0E-02

3. 0E-01

B. 3E-02

1. 9E+02

1. 6E+01

3. 7E+00

2. 2E+01

1. 1E+00

4. 1E-02

2. 4E+01

1. 1E+01

2. BE+00

5.2E+00

1. 0E. 03

1. 0E-01

1. 7E-01

2. 4E-01 5. 6E-02

2. 2E. 01 5. 6E-02

2.2E.01 5.6E-022. 2E-01 5. 6E-02

8. 6E. 02 3. 6E-02

1. 3E+02

1. 1E+04

1. 6E+03

1. 5E+02

1. 6E+04

3. 1E-03

2. 2E-03

2. 2E-03

1. 8E. 01

1. 3E+03

9. 6E+02

1. 9E+02

2.8E.011.7E+023. 7E+02

7. 1E+03

1. 0E+04

2. 9E+D2

1. 5E+02

2. 1E+02

S.4E-044. 4E+04

8. 5E+02

1. 1E+06

4. 5E+03

5.3E+032. 8E+02

3. 4E+01

5. 1E. 08

2.0E+008.9E+018. 9E+01

8. 9E+01

6. 0E-02

3. 0E-01

8. 3E-02

1. 9E+02

1.6E+01

3.7E+00

2. 2E+01

1. 1E+00

1.7E-01

4. 1E-02

2. 4E1-01

1. 1E+01

2. 8E+00

5. 2E+00

1. 0E-03

1. 0E. 01

1. 7E-01

2. 4E-01 5. 6E. 02

2. 2E-01 5. 6E-02

2. 2E-01 5. 6E-02

2. 2E. 01 5. 6E. 02

B.6E.02 3.6E-02

1. 3E+02

1. 1E+04

1. 6E<03

1.5E+02

1.6E+04

3. 1E-03

2.2E.032.2E.03

1. 8E-01

1.3E+039. 6E*02

1.9E+022. 8E-01

1. 7E+02

3. 7E*02

7. 1E+03

1. 0E+04

2. 9E+02

1. 5E*02

2.1E+025. 4E-04

4. 4E+04

8. 5E<-02

1. 1E+06

4. 5E+035. 3E+03

2. 8E4-02

3. 4E*01

5. 1E-08

2. 0E<-00

8. 9E+01

8. 9E+01

8. 9E+01

6.0E-023. 0E.01

1. 3E+02

1. 1E*04

1.6E+031. 5E+02

2. 5E. 02

1. 5E*01

6. 4E-KX)

O. OE+00

1. BE. 02

1. 5E+00

3. 1E1-00

3. 1E. 03

2. 2E-03

6. 0E. 04

1. 0E. 01

6. 8E-02

1. BE. 01

1. 3E+03

9. GE+02

1. 9E+02

2.8E.011. 76*02

3. 7E+02

7. 1E*03

1. 0E+04

2. 9E<-02

O. OEtOO

1. 5E+02

2. 1E+02

5.4E-044.4E+04

8. 5E*02

1. 1E*06

4. 5E+03

5.3E*032. 8E+02

3.4E+01

5.1E.082.0E+003.4E-023.4E-02

3.4E. 02

8.9E-KM

2. 2E-02

3. 0E. 01

page 2 of 4 Attachment 6 MSTRANTI - Freshwater WLAs 7/25/2018-10:10 AM

Parameter

(ug/1 unless noted)

Background

Cone.

Water Quality CriteriaChronic I HH (PWS HH

Wasteload Allocations

Acute | Chronic | HH(PWS)| HH

Antidegradation Baseline

Acute | Chronic | HH (PWS)| HH

Antidegradation Allocations

Acute | Chronic | HH (PWS) | HH

Most Limiting Allocations

Chronic | HH (PWS) HH

MethodTarget Value

Ethylbenzene

Fluoranthene

Fluorene

Foaming Agents

Guthlon

Heptachlorc

Heptachtor Epoxide°Hexachlorobenzene0

Hexachlorobutadiene0

1-1 exachlorocycl ohexane

Alpha-BHCC

Hexach lorocycl ohexaneBeta-BHC"

HexachlorocyclohexaneGamma-BHCC(Lindane)

Hexachlorocyclopentadlene

Hexachloroethane0

Hydrogen Sulfide

lndeno(1,2,3-cd)pyrenec

Iron

Isophorone

Kepone

Lead

Malathion

Mercury

Methyl Bromlde

Methylene Chloride °

Methoxychlor

Mirex

Nickel

Nitrate (as N)

Nitrobenzene

N-Nltrosodlmethylamlne"N-NJtrosodiphenylamine0

N-Nitrosodi-n-propylamine

Nonylphenol

Parathion

PCB Total0

Pentachlorophenol °

Phenol

Pyrene

Radlonuclldes

Gross Alpha Activity

(pCi/L)Beta and Photon Activity

(mrem/yr)

Radlum 226 + 228 (pCi/L)

Uranium (ug/1)

5. 2E-01

5.2E-01

1.0E-023. 8E-03

3. 8E-03

O.OE+002. 1E+01 2.4E+00

1.0E.011. 'tE+00 7. 7E-01

3. 0E-02

O.OE+005. 8E+01 6.4E+00

2.BE+01 6.6E+00

6. 5E-02 1. 3E-02

1.4E-02

4.3E+00 3.3E+00

2. 1E+03

1.4E+02

5. 3E+03

7. 9E-04

3. 9E-04

2. 9E-03

1. 8E+02

4. 9E-02

1.7E.01

1. 8E+00

1. 1E+03

3. 3E+01

9.6E+03

1. 5E+03

5.9E+03

4. 6E+03

6. 9E+02

3. 0E+01

6. 0E+01

5. 1E+00

6.4E-04

3.0E+018. 6E+05

4. 0E+03

5. 2E-01

5. 2E. 01

9. 5E. 01

1.0E-023. BE-03

3. 8E-03

2.0E+00

O. OE+00

2. 1E+01 2.4E+00

1. 0E. 01

1. 4E+00 7. 7E-01

3. 0E-02

O. OE+00

5.6E+01 6.4E+00

2. BE+01 6. 6E+00

6. 5E-02 1. 3E-02

1.4E-02

'1. 3E+00 3. 3E+00

2. 1E+031. 4E+02

5. 3E+03

7.9E-043. 9E-04

2. 9E-03

1. 8E+02

4.9E-02

1. 7E-01

1. 8E+00

1. 1E+03

3. 3E+01

1. 8E. 01

9. 6E+03

1. 5E+03

5. 9E+03

4. 6E+03

6.9E+023. 0E+01

6. 0E+01

5. 1E+00

6. 4E-04

3. 0E+01

8.6E+054. 0E+03

1.0E-02

5.2E.01 3.8E-03

5. 2E-01 3. 8E-03

O. OEtOO

2. 1E+01 2.4E*00

1. 0E-01

1. 4E*00 7. 7E-01

3. 0E. 02

O. OEtOO

5. 8E+01 6.4E*00

2. 8E+01 6. 6E<-00

6. 5E. 02 1. 3E. 02

1. 4E-02

4.3E*00 3.3E+00

2. 1E+03

1. 4E+02

5. 3E+03

7.9E. 04

3.9E. 04

2.9E-031.8E+02

4.9E-02

1.7E-01

1. 8E1-00

1. 1E+03

3. 3E1-01

1. 8E-01

9. 6E*03

1. 5E+03

5. 9E+03

6. 9E1-02

3. 0E+01

6. 0E+015. 1E+00

G. 4E-04

3. 0E1-01

8.6E+054. 0E+03

2. 1E4-03

1.4Et02

5. 3EW13

O.OEtOO1. 0E. 02

7.9E-04

3.9E-04

2.9E.031. 8E+02

4.9E. 02

3. 8E-01

1. 1E+03

3.3Et012. 0E+00

1. 8E-01

O. OE+00

9. 6Et03

O. OE*00

1. 4EK)0

1. 0E-01

4. 6E-01

1. 5Et03

5. 9E+03

1. 8E. 02

O.OEtOO3. 9EK10

O. OEtOO

6. 9E+02

3.0E+01

6. 0E*01

5.1E*004. 0EtOO

7. 8E-03

6. 4E. 04

1. 7E<-00

8. 6E+05

4. 0E*03

O. OEtOO

O.OEtOOO. OE+00

0. 06*00


Parameter

|(ug/l unless noted)

Background

Cone.


Acute | Chronic |HH(PWS)| HHWasteload Allocations

Acute | Chronic |HH(PWS)| HHAntidegradation Baseline

Acute | Chronic |HH(PWS)| HHAntidegradation Allocations

Acute | Chronic | HH (PWS) | HHMost Limiting Allocations

Chronic | HH (PWS)

MethodTarget Value

Selenium, Total Recoverable

Silver

Sulfate

1, 1,2,2-Tetrachloroethanec

Telrachlcroethylene0

Thallium

Toluene

Total dissolved solids

Toxaphene °

Tributyltin

1,2.4-Trichlorobenzene

1, 1, 2-Trichloroethanec

Trichloroethylene c12,4,6-Trichlorophenol °2-(2.4,5-Trtehlorophenoxy)ipropionicacid(Silvex)

'Vinyl Chloride"; Zinc

2. 0E+01

3. 4E-01

2. 0E+01

3. 4E-01

2.0E+013. 4E. 01

5. 0E+00

7. 3E-01

4. 6E-01

2. 0E-04

7. 2E-02

3.7E+01 3. 7E+01

4. 0E+01

3. 3E+01

4. 7E-01

6. 0E+03

7. 0E+01

1.6E+023. 0E+02

2.4E+01

2. 4E+01

2. 6E+04

7. 3E-01

4. 6E-01

2. 0E-04

7. 2E. 02

3. 7E-KM 3. 7E+01

4.0E+01

3. 3E+01

4. 7E-01

6. 0E+03

7. 0E+01

1.6E+023.0E+022. 4E+01

2. 4E+01

2.6E+04

7. 3E-014. 6E-01

2.0E.047. 2E. 02

3.7E*01 3.7E+01

4.0E«D1

3. 3E+D1

4. 7E-01

6. 0E+03

7. 0E+01

1. 6E+02

3. 0E+02

2.4E+B1

2.4E+01

2. 6E+B4

3. 0E+00

1. 3E-01

O. OE+00

4.0E+013. 3E+01

4. 7E-01

6.0E+03O. OE+00

1.2E-044. 3E. 02

7.0E-KI1

1. 6E+02

3. 0E+02

2. 4E-K11

O. OE-KIO

2. 4E+01

1. 5E+01

Notes:

1. Alt concentrations expressed as micrograms/liter(ug/l), unless noted otherwise

2. Discharge flow is highest monthly average or Form 2C maximum for Industries and design flow for Municipals

3. Metals measured as Dissolved, unless specified otherwise

4. "C" indicates a carcinogenic parameter

5. Regular WLAs are mass balances (minus background concentration) using the % of stream flaw entered above under Mixing Information.

Antidegradation WLAs are based upon a complete mix.

6. Antideg. Baseline = (0. 25(WQC - background cone. ) + background cone. ) for acute and chronic

= (0. 1(WQC - background cone. ) + background cone. ) for human health

7. WLAs established at the following stream flows: 1 Q10 for Acute, 30Q10 for Chronic Ammonia. 7Q10 for Other Chronic, 30Q5 for Non-carcinogens and

Harmonic Mean for Carcinogens. To apply mixing ratios from a model set the stream flow equal to (mixing ratio - 1), effluent flow equal to 1 and 100% mix.


Attachment 7

Summary of DMR Data and pH Data

Permit Number equal to VA0089630

OutfallNumber

OD1001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001

001001001001001001001001001001001001001

Par Description

AMNONIA, AS N APR-OCTAMHONIA, AS N APR-OCT

AMMONIA, AS N APR-OCTAMMONIA. AS N APR-OCT

AMMONIA, AS N APR-OCTAMMONIA, AS N APR-OCTAMMONIA. AS N APR-OCTAMMONIA, AS N APR-OCTAMMONIA, AS N APR-OCTAMMONIA, AS N APR-OCT

AMMONIA, AS N APR-OCTAMNONIA, AS N APR-OCTAMMONIA, AS N APR-OCT

AMMONIA, AS N APR-OCT

AMMONIA, AS N APR-OCTAMMONIA, AS N APR-OCTAMMONlft, AS N APR-OCTAMMONIA, AS N APR-OCTAMMONIA, AS N APR-OCTAMMONIA, AS N APR-OCTAMMONIA, AS N NOV-MARAMMONIA, AS NOV-MARAMHONIA, AS N NOV-MARAMMONIA, AS N NOV-MARAMMONIA, AS NOV-MARAMMONIA, AS N NOV-MARAMNONIA, AS N NOV-MARAMMONIA, AS NOV-NARAMMONIA, AS N NOV-MARAMMONIA, AS N NOV-MARAMMONIA, AS NOV-MARAMMONIA, AS N NOV-MARAMMONIA, AS N NOV-MARAMMONIA, AS NOV-MARAMMONIA, AS N NOV-MARANMONIA, AS N NOV-HARAMMONJA, AS NOV-MARAMMONIA, AS N NOV-MARAMMONIA, AS N NOV-MARAMMONIA, AS NOV-HARCBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5CBOD5

QuantityAverage

0.0020.002NRNR

<QL0.001NRNR0.00070.0002NRNR0. 077

NRNR0. 00010. 00008NRNR

<QL0. 005

<QL<QL

<QL<QL0. 0034

<QLO. OOB

<QL0.0030.0020.005

0.0050.0030.002

<QL

QuantityMaximum

0.0020.002NRNR

<QL0.001NR

NR0.00070. 0002NRNR0.077

NRNR0. 00010. 00008NRNR

<QL0.005

<QL<QL

<QL<QL0.0034

<QL0.008

<QL0.0030. 0020. 005

0. 0050. 0030. 002

<QL

Quantity LlmAverage

0.0030.0030.0030.0030.0030.0030.0030.0030.0030. 0030.0030.0030.0030.0030.0030.0030.0030. 0030.0030.003

0. 020. 020. 020. 020. 02

0. 020. 020. 020. 020. 020. 020. 020. 020. 020. 020. 020. 020. 02

QuantityUrn Max

0. 0050.0050. 0050.0050.0050.0050.0050.0050.0050. 0050.0050.0050.0050.0050.0050.0050.0050. 0050. 0050.005

0. 030. 030. 030. 030. 03

0. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 03

Quo Concentration

Description Mln

KG/DKG/DKG/DKG/DKG/DKS/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/D

KG/DKG/DKG/DKG/DKS/DKS/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/D

Concentration

Average

1.71.9NRNR

<QL0. 92HRNR0. 660. 22NRNR6776

NRNR0. 180. 10NRMRNRNR2.0

<QLNR.

NR2.0

<QLNRNROil023NR

<QL19.79NRNR10.920. 54

<QL4

<QL<QL<QL

<QL3

<QL7

<QL3

2

6

4

3

<QL

Concentration

Max

1.71,9NRNR

<QL0. 92NRNR0. 660. 22NR

NR67. 76

NRNR0180. 10NRNRNR

NR20

<QLMR

NR2.0

~-QLNRNR0. 110^3NR

<QL19. 79NRNR10.920. 54

<QL4

<QL<QL<QL

<QL3

<QL7

<QL3

2

<QL

Concentration

Urn MlrConcentration

Llm Avg

1.01.01.01.01.0

1.01.01.01.0l.u1.01.01.01.01.01.01.01.0101.03.13 13.13.13.13.13.13^13.13 13.13^13.131313.13.1313.13 15.05.05.05.05.05.05.05.05.0505.05.05.05.05.05.05.05.0

ConcentrationUrn Max

1.51.51.51.51.51.515r51.51.5151.51.51.5151.51.51.51.51.53.13.13.13.13.13.13.13.13.13.13.13.13.13 13 13.13.13 13.13.18.08.08.08.08.08.08.0g.o80

B.O8,0

8.0s.o

Cue

Descriptlon

MG/LMG/LHG/LMG/LMG/LMG/LMG/LMG/LHG/LMG/LMG/LMG/LMG/LMG/LHG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LNG/LHG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/L

MG/LMG/LMG/LHG/LMG/L

MonitoringStart Date

4/1/20137/1/201310/1/20131/1/20144/1/20147/1/201410/1/20141/1/20154/1/20157/1/201510/1/20151/1/20164/1/20167/1/201610/1/20161/1/20174/1/20177/1/201710/1/20171/1/20164/1/20137/1/201310/1/20131/1/20144/1/2014

7/1/201410/1/20141/1/20154/1/20157/1/201510/1/20151/1/20164/1/20167/1/201610/1/20161/1/20174/1/20177/1/201710/1/2017Vl/20184/1/20137/1/201310/1/3013Vl/20144/1/20147/1/201410/1/2014Vl/20154/1/20157/1/201510/1/20151/1/20164/1/20167/1/201610/1/20161/1/20174/1/2017

7/V2017

MonitoringEnd Date

6/30/20139/30/201312/31/20133/31/20146/30/2014

9/30/201412/31/20143/31/20156/30/20159/30/201512/31/20153/31/20166/30/20169/30/201612/31/20163/31/20176/30/20179/30/201712/31/20173/31/20186/30/20139/30/201312/31/20133/31/20146/30/20149/30/201412/31/20143/31/20156/30/20159/30/201512/31/20153/31/20166/30/20169/30/201612/31/20163/31/20176/30/20179/30/201712/31/20173/31/20186/30/20139/30/201312/31/20133/31/20146/30/20149/30/201412/31/20143/31/20156/30/20159/30/201512/31/20153/31/20166/30/20169/30/201612/3V20163/31/20176/30/20179/30/2017

001001001001001001001001001001001001

001001001001001001001001001

001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001

001001001001001001001001001001

CBOD5CBOD5CL2. INSTTECH MIN UMFTCL2. INSTTECHMIN LJMrTCL2. INSTTECHMIN LIMITCL2. INSTTECHMIN UMH-CL2, INSTTECHMIN LIMITCL2, INSTTECHMINUMrrCL2. INSTTECHMIN LJMrTCL2. INSTTECHMIN UMH-CLZ. INSTTECHHIN LIMrTCL2, INSTTECH MIN UMFT

CL2. INSTTECHMIN LIHrTCL2. INSTTECHMIN LIMITCL2. INSTTECHMIN UMITCL2. INSTTECHMIN LIMITCL2. INSTTECHMIN UMITCL2, INSTTECHMIN LIMITCL2. INSTTECHMIN UMITCL2, INSTTECHMIN LIMITCL2, INSTTECH MIN UMrT

CL2. INSTTECHMIN UMITCL2, TOTAL CONTACT

CL2, TOTAL CONTACTCL2, TOTAL CONTACTCL2, TOTAL CONTACTCL2, TOTAL CONTACTCL2, TOTAL CONTACT

CL2, TOTAL CONTACTCL2, TOTAL CONTACTCL2, TOTAL CONTACTCL2, TOTAL CONTACTCL2, TOTAL CONTACTCL2, TOTAL CONTACT

CL2, TOTAL CONTACTCL2, TOTAL CONTACTCL2. TOTAL CONTACTCL2, TOTAL CONTACTCL2, TOTAL CONTACTCL2, TOTAL CONTACTCL2, TOTAL CONTACT

CL2, TOTAL CONTACT0.2, TOTAL FINALCL2. TOTAL FINAL

CL2, TOTAL FINALCL2, TOTAL FINAL

CL2. TOTAL FINALCL2, TOTAL FINALCL2. TOTAL FINALCL2, TOTAL FINALCL2, TOTAL FINALCL2, TOTAL FINALCL2, TOTAL FINALCL2, TOTAL FINALCL2. TOTAL FINAL

CL2, TOTAL FINALCL2, TOTAL FINALCL2, TOTAL FINALCL2, TOTAL FINALCL2. TOTAL FINALCL2. TOTAL FINALCL2, TOTAL FINALDODODO

0.0020.003

0.0020.003

0. 020. 02

0. 030. 03

KG/DKG/D

5.05.0

B.O8.0

2.21.11.71.42.21.91.91.81.11.91.51.11.3

1.21.61.9

l.S2.22.22.21.11.71.42.21.91.91,81.11.91.51.11.3

1.21.61.91.62.22.2

<QL<QL<QL

<QL<QL

<QL<QL<QL<QL<QL<QL<QL<QL

<QL<QL

<QL<QL<QL<QL

<QL<QL<QL

<QL<QL<QL<QL<QL<QL<QL<QL<QL<QL

<QL<QL<QL

<QL<QL<QL

0.60^60.60.60.60.60.60.606O.b0.60.60.60.60.6060.60.60.60 61.01.01.01.01.01.01.01.010101.01.01.01.01.01.01.01.01.01.0

00160.0160.0160.0160.0160.0160. 0160.01600160.0160.0160. 0160 016

0. 0160 0160.0160.0160.01600160. 016

0. 0160. 0160. 0160.0160. 0160.0160.0160.01600160.0160. 01G0.0160.0160.0160. 0160.0160.0160. 01G0, 0160^016

8.28.28.6

5.05.05.0

MG/LMG/LHG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/L

MG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMS/LMG/LMG/LNG/LMS/LMG/LMG/LMS/LMG/L

MG/LMG/LMG/LMG/LMG/LHG/LMG/LMG/LHG/LMG/LMG/LMG/LMG/LMG/LHG/LMG/LMG/LNG/LHS/LMG/LMG/LNG/LHG/LHG/LMG/LHS/LHG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/L

10/1/20171/1/20184/1/20137/1/201310/1/20131/1/20144/1/20147/1/201410/1/20141/1/20154/1/20157/1/201510/1/2015Vl/20164/1/20167/1/201610/1/20161/1/20174/1/20177/1/201710/1/20171/1/20184/1/20137/V201310/1/20131/1/2014'1/1/20147/1/2014

.10/V20U1/1/20154/1/20157/1/201510/1/20151/1/20164/1/20167/1/201610/1/20161/V20174/V20177/1/201710/1/20171/1/20184/1/20137/1/201310/1/20131/1/20144/1/20147/1/201410/1/20141/1/20154/1/20157/1/201510/1/20151/1/20164/1/20167/1/201610/1/20161/1/20171/1/20177/1/201710/1/20171/1/20181/1/20137/1/201310/1/2013

12/31/20173/31/20186/30/20139/30/201312/31/20133/31/20146/30/20149/30/201412/31/20143/31/20156/30/20159/30/201512/31/20153/31/20166/30/20169/30/201612/31/20163/31/20176/30/20179/30/201712/31/20173/31/20186/30/20139/30/201312/31/20133/31/20146/30/20149/30/201412/31/20143/31/20156/30/20159/30/201512/31/20153/31/20166/30/20169/30/201612/31/20163/31/20176/30/20179/30/201712/31/20173/31/20186/30/20139/30/201312/31/20133/31/20146/30/20149/30/201412/31/20143/31/20156/30/20159/30/201512/31/20153/31/20166/30/20169/30/201612/31/20163/31/20176/30/20179/30/201712/31/20173/31/20186/30/20139/30/201312/31/2013

001001001001001001001001001001001001001001001001001001001001

001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001

001001001001001001001

DODODODODODODODODODODODODODODODODOE.COLIE.COLIE.COLIE.COUE.COUE.COLIE.COUE.COUE.COUE.COLIE.COLIE.COLIE.COLIE.COUE.COUE.COUFLOWFLOWFLOWFLOWFLOW

FLOWFLOWFLOWFLOWFLOWFLOWFLOWFLOWFLOWFLOWFLOWFLOWFLOW

FLOWFLOW

pH

pHpHpHpHpHpHpH

pHpHpH

pH

0, 00030. 00030. 00030. 00030. 00030. 00030. 00030. 00030. 00030. 00030. 00030. 00030. 0003

0. 00020.00020.00020.00020.00020.0002

0. 0002

0. 00020. 00020. 00020. 0002

0. 0002

0.00080.00080. 00080.00080.00080.00080.00080.00080, 00080, 0008o. ooos0. 00080. 00080. 00080. 00080. 00080. 00080. 00080. 00080. 0008

NLNLNLNLNLNLNL

MGDHGDMGDMGDMGDMGD

MGDMGDMGDMGDMGD

MGDMGDMGDMGDMGDMGD

MGDMGD

MGD

8.38.27.27.28.16.67.97.98.96.2

8.67.96.87.27.87.4

7.26.27.36.47.47.77.76.37.77.67.67.7

<1<1<1<1

<1<11

5.2NR30NRNR<l2

<1

7.26.27.36.47.47.77.76.37.77.67.67.7

5.05.05.05.05^0505.05.05.05.05.05.05.0505.05.05.0

6.06.06.06.06.06.06,06.06.0606.06.0

126126126126126126126126126126126126126126126126

9.09.09.09.09.09.09.09.09.09.09.09.0

MG/LMG/LMG/LHG/LMS/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LHG/LHG/LMG/LMG/L0100MtlOOMiflOOMi>100M#100M

iflOOMT100M*100M#100M

tlOOM*100M»100MflOOVIi!100MtflOOM

nooM

susususususususususususu

1/1/20144/1/20147/1/201410/1/20141/1/20154/1/20157/1/201510/1/20151/1/20164/1/20167/1/201610/1/20161/1/2017

4/1/20177/1/201710/1/20171/1/2018

4/1/20137/1/201310/1/20131/1/2014

4/1/20147/1/201410/1/20141/1/20154/1/20157/1/20157/1/201510/1/20151/1/20164/1/20167/1/20167/1/20174/1/20137/1/201310/1/20131/1/20144/1/20147/1/201410/1/20141/1/20154/V20157/1/201510/1/20151/1/20164/V20167/1/201610/1/20161/1/20174/1/2017

7/1/101710/1/20171/1/20184/1/20137/1/201310/1/20131/1/20144/1/20147/1/201410/1/20141/1/20154/1/20157/1/201510/1/20151/1/2016

3/31/20146/30/20149/30/201412/31/20143/31/20156/30/30159/30/201512/31/20153/31/20166/30/20169/30/201612/31/20163/31/20176/30/20179/30/201712/31/20173/31/20186/30/20139/30/201312/31/20133/31/20146/30/20149/30/201412/31/20143/31/20156/30/20157/31/20159/30/201512/31/20153/31/20166/30/20167/31/20167/31/20176/30/20139/30/201312/31/20133/31/20146/30/20149/30/201412/31/20143/31/20156/30/20153/30/201512/31/20153/31/20166/30/20169/30/201612/31/20163/31/20176/30/20179/30/201712/3V201-;3/31/20186/30/20139/30/201312/31/20133/31/20146/30/20149/30/201412/31/20143/31/20156/30/20159/30/201512/31/20153/31/2016

001

001001001001001001001001001001001001001001001001001001001001001001001001001001001

001001001001001001001001001001001001001001001001001001001001

pH

pHpH

pHPHpHpHpHPHOSPHORUS,PHOSPHORUS,PHOSPHORUS,PHOSPHORUS,

PHOSPHORUS,PHOSPHORUS,PHOSPHORUS,PHOSPHORUS,PHOSPHQRUS,PHOSPHORUS,PHOSPHORUS,

PHOSPHORUS,PH05PHORUS,PHOSPHORUS,PHOSPHORUS,PHOSPHORUS,PHOSPHORUS,PHOSPHORUS,PH05PHORUS,PHOSPHORUS,TSSTSSTSSTSSTSSTSSTSSTSSTSSTSSTSSTSSTSSTSSTSSTSSTSSTSSTSSTSS

7.37.37.36.6

TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)TOTAL (AS P)

0.00260. 003

0.0002

<QL0. 00020. 00020. 00340, 00020. 00020. 00070. 00030.0030.006

0.0080.00090.00030.000110.0010.00010.004

<QL0. 0020. 0060, 0010, 0020. 0050. 0030. 005

<QL0. 0040. 0040. 016

0. 0060. 00030. 0020. 001

<QL0. 003

0.00260.0030.0002

<QL0.00020. 0002O. DD340. 00020. 00020. 00070. 00030. 0030.006

0.0080. 0009

0.00030.000110.0010.00010.004

<QL0, 0020. 0060. 0010. 0020. 0050, 0030.005

<QL0.0040.0040.016

0.0060.00030.0020.001

<QL0, 003

0.00050.00050. 00050, 00050. 00050. 00050. 00050.00050.00050.00050.00050.00050.00050.00050.00050.00050.00050.00050.00050. 00050. 020. 020. 020. 020. 020, 020. 020. 020. 02

0. 020. 020. 020. 020. 020. 020. 020. 020. 020. 020. 02

0. 00080.00080.00080. 0008

0.00080.00080.00080. 00080.00080.00080.00080. 00080.00080. 00080. 00080.00080.00080, 00080.00080. 0008

0. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 030. 03

KG/DKG/DKG/DKS/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKS/DKG/DKG/D

KG/DKG/DKG/DKG/DKG/DKG/DKG/DKS/DKS/DKG/DKG/DKG/DKG/DKS/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/DKG/D

2. 312. 770.21

<QL0. 140. 202970. 220. 220. 650. 232. 515. 61

11.041. 210. 420. 141. 560. 153.4

<QL1.65.31.22.04.1

2.64.4

<QL3.43.814.1

8.23.82.51.3

<QL4.4

7.6

7.37.37.36.67.37.32. 312. 770. 21

<QL0. 14

0. 202.970220. 220. 650. 232. 515. 61

11. 04

1. 210.420. 141. 560. 153.4

<QL1.65.31.22.04.12.64.4

<QL3.43,8

14,1

8.23.82.51.3

<QL4.4

6.06.06.06.06.06.06.06.0

0. 180. 180. 180. 1B0. 180. 180.180. 180. 180. 180. 180. 18o. ia0. 180, 180. 180. 180. 180. 180. 186.06.06^06.06.06.06.06.06.06.06.06,06.06.06.06.06.06.06.06.0

9.09.09.03.09.09.09.03.00. 270. 270. 270. 270. 270. 270. 270. 270. 270. 270. 270. 270. 270. 270. 270. 270. 270. 270. 270. 279.09.09.09.09.09.09.09,09.09.09.09.09.09.09.0109.09.09.09.0

susususususususuMG/LHG/LMG/LMG/LMG/LMG/LMG/LHG/LHG/LMG/LHG/LMG/Lns/LMG/LMG/LMG/LMG/L

MG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LHG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/LMG/L

4/V20167/1/201610/1/2016Vl/20174/1/20177/1/201710/1/20171/1/20184/1/20137/1/201310/1/20131/1/2014

4/1/20147/1/201410/1/10111/1/20154/1/20157/1/201510/1/20151/1/20164/1/20167/1/201610/1/2016

1/1/20174/1/20177/1/201710/1/20171/1/20184/1/20137/1/201310/1/20131/1/20144/1/20147/1/201410/1/2D141/1/20154/1/20157/1/201510/1/20151/1/20164/1/20167/1/201610/1/20161/1/20174/1/20177/1/201710/1/20171/1/2018

6/30/20169/30/201612/31/20163/31/20176/30/20179/30/201712/31/20173/31/20186/30/20139/30/201312/31/20133/31/20146/30/20149/30/2014

12/31/20143/31/20156/30/20159/30/201512/31/20153/31/20166/30/20169/30/201612/31/20163/31/20176/30/20179/30/201712/31/20173/31/20186/30/20139/30/201312/31/20133/31/20146/30/20149/30/201412/31/20143/31/20156/30/20159/30/201512/31/20153/31/20166/30/20169/30/201612/31/20163/31/2017

6/30/20179/30/201712/31/20173/31/2018

00000000000000000000000000000000000000

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Attachment 8

Monitoring Station Data

Date Time between 1990-01-01 and 2018-06-30Region in list NorthernID equal to 1aACC006. 13

ID1AACC006. 13

1AACC006131AACC006.131AACC006. 131AACC006. 13

1AACC006. 13

1AACC006. 131AACC006 131AACC006. 131AACC006. 13

1AACC00613

1AACC006.131AACC006131AACC006.131AACC00613

1AACC006-13

1AACC006.131AACC006.131AACC006131AACC006. 131AACC006.131AACC006. 13

1AACC006.131AACC006. 131AACC006. 131AACC006. 131AACC006131AACC006. 13

1AACC006. 13

1AACC006. 131AACC006.131AACC006.131AACC006131AACC006131AACC006.131AACC006.131AACC006.131AACC006. 131AACC00613IAACC006.131AACC006. 13

1AACC006. 13

1AACC006. 131AACC006.131AACC006. 131AACC006. 131AACC006.131AACC006.131AACC006. 13

1AACC006. 13

1AACC006. 13

Date Time10/3/19902/13/19914/23/1991

10/2/19911/21/19924/15/19927/27/199210/20/19921/28/19934/21/19937/27/199310/25/19931/26/19944/5/19948/30/199410/13/19942/13/19955/23/19955/23/19958/22/1995

11/28/1995

2/27/19966/3/19968/29/199612/2/19963/18/19976/24/19979/29/199710/15/199712/18/19973/24/19986/11/199812/16/1998

2/22/1999

3/29/19993/30/19997/14/19999/29/199911/16/1999

1/5/20003/16/20005/18/20009/21/200011/28/20001/25/20013/13/2001

5/3/2001

12/20/20012/7/20024/15/20022/6/2003

RegionNorthern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Temp Celsius Field Ph Do Probe Hardness Value42

36132104

1.2

228

1.815.422.69-81.2

9519610.60.1

16.721.6898.6

15.6

20.99.1

7

16.715.2

3.15.9

16.54323

11.2

19.318.68.58.6

11.02197

18. 73

5. 06

9. 0318.674. 91

3. 75

21. 153.23

8

6468

6.9

5.67 16.8

6

6.77

7768

7

737.7

6.56.9

7 37

676.6

7

77

7.36.9

7

6.97

6.65.9

6.87

6.8

7.66. 526. 57

5.237. 157. 04

7. 51

6. 686. 36

28201638

11.9 1818

7 268. 7 26

12. 3 18

9. 1 16

64 488.9 34

13.5 2411 1 15

79

94 2013.8 26

20

6. 3 22

10.6 2611. 4 20

91 568. 5 24

109 2411. 2 18.5

8. 1 10

6.813.411.3 17 5

8. 9 22.6

12. 8 28

13 7 1109.2

Average Hardness Value25.83043478

8.29.1

9

10.8

11. 56

7.1504

11.78

4. 24

8. 8710.510.18. 88

12. 72

174

39.822.527.5

27

3419.630.623.2

20.1

14.96.4103328.3

1AACC00613

1AACC006.131AACC006131AACC00613

1AACC006-13

1AACC006.131AACC006 131AACC006. 13

1AACC006. 13

1AACC006131AACC006131AACC006131AACC006. 13

1AACC006. 13

1AACC006. 131AACC006. 131AACC006. 13IAACC006.131AACC006 13

1AACC006. 13

1AACC006. 13

1AACC006131AACC006.131AACC006.131AACC00613

1AACC006. 13

1AACC006. 131AACC006.131AACC006 131AACC006. 13

1AACC006. 13

1AACC006.131AACC006. 131AACC006. 131AACC006. 131AACC006.131AACC006. 13

1AACC00613

1AACC006. 13

1AACC006.131AACC006. 131AACC006. 131AACC006. 13

4/2/20036/10/2003

7/15/20039/23/20035/4/20046/22/20047/14/20048/30/20049/28/200411/9/20041/27/20052/7/20053/21/20055/26/20056/20/20053/12/20075/3/2007

7/23/200711/29/20071/30/20084/24/20086/26/2008

8/21/2008

10/30/200812/9/20081/25/20102/24/20103/29/20104/22/20105/25/20106/29/20107/27/20108/31/20109/29/201010/19/2010

11/29/20101/3/20111/22/20182/12/20183/7/2018

4/3/2018

5/1/20186/14/2018

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

Northern

12. 9218. 2621.622044

120322.2824.7322.7418.958. 620. 21375

10.64145818.34

6.616.519.5

5.7

54

14.920.8

207.8

25

8.92.9

10.112.3

18.523.922.8

22

18.713 35.7

3

2. 79

9.45.459. 74

12. 07

20.8

6.896. 59

6.25.998. 04642

6.7

7 186.4

658601

6. 64

6. 616. 546.46.4

6.5

6.26.66.56.6666.16.36.76.96.86967

69

6.66.96874

6.9

6.66.7

7.426. 386.857. 066. 89

6. 86

7. 58 21.5

8 61 22.8

8. 16771

13. 326356.998. 139. 52

1142

14 54

14. 14

120510. 198. 2311 7

9.17.7

11.512.39.6

75

6.59.9

13.311.2

14.6

10.810.3

9

8.36.97.97.3

9.712.513.3

Attachment 9

VAFWIS-DGIF

7/3/2018 VaFWIS Map

^aFWIS - Department|of Game a nd Inland[Fisheries

38,26,49.0-77,28,06.0is the Search Point

Lsub"'"t.J i.cancel:

ISearch Point

{. Change to "clicked" mappoint

Fixed at 38, 26,49.0-77,28,06.0

|Show Position Rings1* Yes 0 Nomile and 1/4 mile at the

ISearch Point

IShow Search Area(. Yes U No

3 Search distance milesradius

Search Point is atmap center

[Base Map ChoicesTopography

Map Overlay ChoicesCurrent List: Position, Search

ilap Overlay Legend

Position Rings1 mile and 1/4

mieatthaSaarch point

3 mBa radiusBaardiAraa

Map [ anClick .

(Refresh Browser Paee IMap ^ . ^'7, -! scree"smaflScale ""' ' 1~===- ---^ size

N

1"TIUI*

Pomt of Search 38,26,49. 0 -77, 28,06.0Map Location 38, 26,49. 0 -77, 28, 06.0

Select Coordinate System: <. Degrees, Minutes, Seconds Latitude - Longitude

Decimal Degrees Latitude - Longitude

Meters UTM NAD83 East North Zone

Meters UTM NAD27 East North Zone

Base Map source: USGS 1 : 100, 000 topographic maps (see Microsoft terraserver-usa. com for details)

Map projection is UTM Zone 18 NAD 1983 with left 279796 and top 4263092. Pixel size is 16meters . Coordinates displayed are Degrees, Minutes, Seconds North and West. Map is currentlydisplayed as 600 columns by 600 rows for a total of 360000 pixles. Tiie map display represents9600 meters east to west by 9600 meters north to south for a total of 92. 1 square kilometers. The

http://vafwis. org/fwis/maps/zMapFomiJava. asp?v=070313 1/2

7/3/2018 VaFWIS Map

map display represents 31501 feet east to west by 31501 feet north to south for a total of 35.5square miles.

Topographic maps and Black and white aerial photography for year 199&4--are from the United States Department of the Interior, United States Geological Survey.Color aerial photography aquired 2002 is from Virginia Base Mapping Program, VirginiaGeographic Information Network.Shaded topographic maps are from TOPO! ©2006 National Geographichttp://www.national.geographic.com/topoAll other map products are from the Commonvrealth of Virginia Department of Game and InlandFisheries.

map assembled 2018-07-03 13:50:44 (qa/qc March 21, 2016 12:20 - tn=913317 dist=4827Visitor )$poi=38.4469444 -77.4683333

DGIF | Credits | Disclaimer | Contact shirl. [email protected],gov IPIease view our privacv.RoJicy |© 1998-2018 Commonwealfh of Virginia Department of Game and Inland Fisheries

http://vafwis. org/fwis/maps/zMapFormJava. asp7vsQ70313 2/2

7/3/2018 VaFWIS GeographicSelect Options

Virginia Department of Game and Inland Fisheries

Home » By Coordinates » VaRWIS GeographicSelect Options

Visitor Options

Species Information

By Name

By LandManagement

Refarences

Geographic Search

By Map

By Coordinates

By Place Name

Help

t^jp 1c (. uiiH'in r'*>v^;:y l-^lii. y Cfim^c* L-f:.

Search Vs DGIF [ Go

Fish and Wildlife Information Service

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VaFWIS Search Report compiled on 7/3/2018, 1:51:14 PM

Known or likely to occur within a 3 mile radius around point 38,26,49,0 -77,28,06.0in 179 Stafford County, VA

494 Known or Likely Species ordered by Status Concern for Conservation(displaying first 20) (19 species wrth Status* or Tier I" or Ter II")

View Map ofSite Location

1050027

BOVA Code . Status* Tier" Common Name Scientific Name

060003

010032

050022

050020

0+0293

060081

040292

030063

010077

100248

040213

040052

040036

040181

040320

040140

040203

040105

010131

FESE

FESE

FTST

SESE

ST

ST

ST

ec

la

113

Ills

lla

lla

I la

lla

lla

lib

lib

llla

IWedqemusseL dwarf

jStuTcieon, Atlantic

If^il northern (pna-eared

Bat, little brown

|Shrike. loaaerhead

Floater. oreen

'Shrike. migrant loaaerhead

Turtle, spotted

Shiner. bridle

Fritillaro. renal

Owl, northern saw-whel

Duck. American black

Night-heron, vellow-cfown. ecL

Warbler. cerulea n

Woodcock. American

Cuckuo. black-billed

Rail, kincj

lAlasmidonta heterodon

Aclpenser oxyrinchus

Myotis septentrionalis

Myotis lucifugus

Perimyotis subflavus

Lanius ludovicianus

Lasmlgona subviridls

Lanius ludovicianus migrans

Ctemmys guttata

Notropis blfrenatus

Speyeria idalia klalia

Aegolius acadicus

Anas rubripes

Nyctanassa violacea violacea

Stema hirundo

Setophaga cerulea

Scotopax minor

;occyzus erythroplhalmus

Rallus elegans

Angullla rostrata

To view All 494 species View 494

*FE-hederal Endangered; FT-Federal Threatensd; SE=Stale Endangered; 5T=State Threstened; FP=Fedfiral Proposed; FC=Federal Candidate, CC=CotlecUon Canuern

"1=VA WiMBfe AcBon Plan - Tier 1 - Critical GDnsarvation Naed- U-VA WlldlHa ActiDn Plan - Tier II - Vary High Conservatton Ne»d; IU=VA wiuina nclion Flan - Tisr III - Hish Consaruallon Nead; ]V=VA WiUllte Actkin Plan - llerVirginia Widlife Action Plan Consen/attan Opportunity Ranking:a - On Ihe ground managemftnl stratagifls/afih'ons exist and can be feasible implemented. : b - On Ihe ground artiun$ or research needs have been Identified but cannot leasibly be impl6;nented al Ihis tinie.;c - No on the ground actions or research needs have besn idenlified or all idsntified consen/alion opportunities have been exhausled.

Anadromous Fish Use Streams

N/A

Impediments to Fish Passage

N/A

Threatened and Endangered Waters ( 12 Reaches)

ht4>://va(wiB.org/fwi6/index.asp 1/3


View Mac of All

Threatened and Endangcn

Stream Name

Highest TE"

T&E Waters Species

BOVA Code, Status , Tier , Common & Scientific Name

View Map

Aquia Creek (062229 )i

Aquia Creek (064919)1

Aquia Creek (066566 )|

Aquia Creek (066598)]



Aquia Creek (071111 }

Aqula Creek (072151)1


Aquia Creek (081267)1

FESE

FESE

FESE

FESE

FESE

FESE

FESE

FESE

FESE

FESE

060003 ||FESE|| la IIWedaemussel. dwarf ;lAlasmidonta heterodon i

060003 ||FESE|| la ||Ws!2geiiw£sel,̂ fflarL[|Ala6mldonta heterodon |

060003 || FESE I] la ||Wedaemussel. dwarf ||Alasmidonta heterodon

060003 || FESE || la ||Wedgemussel. dwarf [|Alasmidonta heterodon

060003 ||FESE || la

060003 ||FESE || la

060003 || FESE || la

WedoemusEel. dwarf

Wedaemussel. dwarf

Alasmldonta heterodon

Alasmidonta heterodon

Wedaemussel, dwarf IIAIasmidontB heterodon

060003 || FESE || la ||Weduemussel. dwarf ||Alasmidonta heterodon

060003 1| FESE || la ]|WedaBmussel. dwarf ||Alasmldonta heterodon

060003'[ FESE I] la ||Wedaemussel. dwarf ||Alasmidonta heterodon

Aquia Creek (087360)1 FESE || 060003 || FESE || la ||Wedgemussel. dwarf ||Alasmidonta heterodon

Xss

'tea

fss.

Yes

Yes

Yes

Yes

tes

Yes

Yes

Yes

To view All 12 Threatenad and Endangered Waters records View 1.

Managed Trout Streams

N/A

Bald Eagte Concentration Areas and Roosts

N/A

BaU Eagle Nests

N/A

Habitat Predicted fof Aquatic WAP Tier I a II species < 3 Ragcnes)

Tier Species

View Map ConiUncd ReacheE from Below of Habitat Predicled fer WAP Tlar I & II Aquatic SOBCles

Stream Name View Map

Highest TE~ BOVA Code, Status , Tier , Common & Scientific Name

Aquie Creek (20700112)1

Austin Run (20700112)

tributary (20700112)

FESE

FESE

FESE

060003 ][ FESE || la ||Wedaemussel, dwarf ||Alasmidonta heterodon

1060003 || FESE j[ la |]Wedgemus5e|. dviarf. JA Iasmidonla heterodon

II 060003 || FESE ]| la ||Wedaemussel. dwarf ||Alasmidonta heterodon

Yes

Yes

Yea

Habitat Predicted for Terrestrial WAP Tier I & II Species

N/A

Virginia Breeding Bird Atlas Blocks (6 recorts) View Map of All Query ResultBVirginia Breeding Bjrd Atlas Blocks

I BBA ID Atlas Quadrangle Block NameDifferent Species Highest TE Highest Tier

Public Holdings: (i names )

Name Agency Level

Quantico MCCDC - Suadalcanal side || U. S. Dept. of Navy || Federal

http://vafwis.org/fwis/index.asp 2/3


Summary of BOVA Species Associated with cnies and Counties of the Commonwealth of Virginia;

FIPS Code City and County Name Different Species Highest TE Highest Tier

|179 ~|[Stafford 431.1 FESE

USGS 7.5' Quadrangles:StorckStafford

USGS NRCS Watersheds in Virginia;

WA

USGS National 6th Order Watersheds Summary of WiMllfe Action Plan Tier I, II, III, and IV Species:

HUE Code USGS 6th Order Hydrologic Unit Different Species Highest TE Highest Tier

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I 7/3/2018,1:51:15 PM 1 IMaP I Crclits | Biiidainier | Pleam view our pjwac.rEnlis:© 1998-2018 Commonwealt)) of Virginia Department of Game and Inland FisheriesVisitor 913317

If you have tlUficulty reading or accessing documents, please Coiilacl Us for assistante.

http://vafwis .org/fwis/index. asp 3/3

Attachment 10

1998Ammonia Calculation

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Analysis of the Randall SFH STP affluent data for aimnonia as nitrogen ̂ y/-Târ)The statiefcics for ammonia as nitrogen are;

Number of values a 1Quantification level = .2Number < quantification = oExpected value a 10Variance » 36 OOODIC. V. = .697th percentile « 24. 33418Statistics used c Reasonable potential assumptions - Type 2 data

The WLAe for ammonia as nitrogen are:Acute WLA = 12.3Chronic WIA = 2. 13Human Health WLA = ----

The limits are based on chronic toxicity and 1 Bamplee/month.

Maximum daily limit = 3. 115285Average monthly limit = 3. 115285

It is recommended that only the maximum daily limit be used.DATA10

itnrf-s o-T rê^. \A. re. fr\'ei\\'.ô/^

Analysis of the Randall SFH STP effluent data forammonia as nitrogen (Apr - Oct)

The statistics for ammonia as nitrogen (Apr - Oct) are:Number of valueB = 1Quantificafcion level a .2Nuinber < quantification = 0Expected value = 10Variance = 36. 00001C. V. = .697th percentile « 24. 33418Statistics used » Reasonable potential assumptions - Type 2

The WIAe for awwtonia as nitrogenAcute WIA = 11.9Chronic WLA = 2. 06Human Health KIA = ----

(Apr - Oct) are:

The limits are based on chronic toxicity and 1 samples/month

Maximum daily limit " 3. 012904Average monthly limit " 3. 012904

It is recommended that only the maximum daily limit be used

DATA10

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Attachment 11

STATS for Chlorine and Ammonia

7/3/2018 2:46:15 PM

Facility = Walk ResidenceChemical = ChlorineChronic averaging period = 4WLAa = 19WLAc = 11Q. L. =100# samples/mo. = 1# samples/wk. = 1

Summary of Statistics:

# observations = 1

Expected Value = 200Variance = 14400C.V. = 0.697th percentile daily values = 486.68397th percentile 4 day average = 332. 75897th percentile 30 day average= 241. 210#<Q.L. = 0Model used = BPJ Assumptions, type 2 data

A limit is needed based on Chronic ToxicityMaximum Daily Limit = 16. 0883226245855Average Weekly limit = 16. 0883226245856Average Monthly Limit = 16.0883226245856

The data are:

200

7/13/201812:04:41 PM

Facility = Walk Residence (winter, November - March)Chemical = Ammonia

Chronic averaging period = 30WLAa = 14.4WLAc = 3.47Q. L. =0.2# samples/mo. = 1# samples/wk. = 1

Summary of Statistics:

# observations = 1Expected Value = 9Variance = 29. 16C.V. = 0.697th percentile daily values = 21. 900797th percentile 4 day average = 14. 974197th percentile 30 day average= 10. 8544#<Q. L = 0Model used = BPJ Assumptions, type 2 data

A limit is needed based on Chronic ToxicityMaximum Daily Limit = 7. 001 3152241546Average Weekly limit = 7. 0013152241546Average Monthly Limit = 7. 0013152241546

The data are:

Attachment 12

Public Notice

Public Notice - Environmental Permit

PURPOSE OF NOTICE: To seek public comment on a draft permit from the Department of EnvironmentalQuality that will allow the release of treated wastewater into a water body in Stafford County, Virginia.

PUBLIC COMMENT PERIOD: August 24, 2018 to September 24, 2018

PERMIT NAME: Virginia Pollutant Discharge Elimination System Permit - Wastewater issued by DEQ,under the authority of the State Water Control Board.

APPLICANT NAME, ADDRESS AND PERMIT NUMBER: Robert D. and Angela S. Walk, 50 Randall Road,Stafford, VA 22554, VA0089630

NAME AND ADDRESS OF FACILITY: Walk Residence Sewage Treatment Plant, 50 Randall Road,Stafford, VA 22554

PROJECT DESCRIPTION: Robert D. and Angela S. Walk have applied for a reissuance of a permit for theprivate Walk Residence Sewage Treatment Plant. The applicant proposes to release treated sewagewastewaters from a residential home at a rate of 0. 0008 million gallons per day into a water body. Sludgefrom this treatment process will be disposed by transporting it to the Aquia Advanced WastewaterTreatment Plant (VA0060968). The facility proposes to release the treated sewage wastewater in theunnamed tributary to Accokeek Creek in Stafford County in the Potomac River watershed. The permit willlimit the following pollutants to amounts that protect water quality: pH, carbonaceous biochemical oxygendemand, total suspended solids, ammonia as N, dissolved oxygen, E.coli, total phosphorus, and totalresidual chlorine. The permit requires monitoring without limitation for the following pollutants: dischargeflow, total kjeldahl nitrogen, nitrate+nitrite as N, and total nitrogen.

HOW TO COMMENT AND/OR REQUEST A PUBLIC HEARING: DEQ accepts comments and requestsfor public hearing by hand-delivery, e-mail or postal mail. All comments and requests must be in writing andbe received by DEQ during the comment period. Submittals must include the names, mailing addressesand telephone numbers of the commenter/requester and of all persons represented by thecommenter/requester. A request for public hearing must also include: 1) The reason why a public hearingis requested. 2) A brief, informal statement regarding the nature and extent of the interest of the requesteror of those represented by the requester, including how and to what extent such interest would be directlyand adversely affected by the permit. 3) Specific references, where possible, to terms and conditions of thepermit with suggested revisions. A public hearing may be held, including another comment period, if publicresponse is significant, based on individual requests for a public hearing, and there are substantial, disputedissues relevant to the permit.

CONTACT FOR PUBLIC COMMENTS, DOCUMENT REQUESTS AND ADDITIONAL INFORMATION:The public may review the draft permit and application at the DEQ-Northem Regional Office byappointment, or may request electronic copies of the draft permit and fact sheet.Name: Ann ZimmermanAddress: DEQ-Northern Regional Office, 13901 Crown Court, Woodbridge, VA 22193Phone: (703) 583-3805 E-mail: ann. zimmennanCSdeq. viroinia. aov

April 24, 2018

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