NC0090000 Fact Sheet_DRAFT20230314

Fact Sheet
NPDES Permit No. NCOO9OOOO
Permit Writer/Email Contact Derek Denard, [e-mail]:
Date: DRAFT14Mar2023
Division/Branch:NC Division of Water Resources/Water Quality Permitting Section
Permitting Action:
❑ Renewal
❑ Renewal with Expansion
0 New Discharge
❑ Modification(Fact Sheet should be tailored to mod request)
Note: A complete application should include the following:
• For New Dischargers, EPA Form 2A or 2D requirements, Engineering Alternatives Analysis,Fee
• For Existing Dischargers (POTW),EPA Form 2A, 3 effluent pollutant scans,4 2nd species WET
tests.
• For Existing Dischargers (Non-POTW),EPA Form 2C with correct analytical requirements based
on industry category.
See Permit Application and Additional Information Attachments Al through A8.
Complete applicable sections below. If not applicable, enter NA.
1. Basic Facility Information
Facility Information
Applicant/Facility Name: Colonial Pipeline Company/ Colonial Pipeline Company—2020-L1-
SR2448
Applicant Address: 1185 Sanctuary Pkwy, Suite 100,Alpharetta, GA 30009
Facility Address: 14108 Huntersville-Concord Rd,Huntersville,NC 28078
Permitted Flow: 0.576 MGD
Facility Type/Waste: Major*, Groundwater Remediation Discharge/ 100%Industrial
Facility Class: Grade I Physical Chemical Water Pollution Control System
Treatment Units: See below
Pretreatment Program(Y/N) N
County: Mecklenburg
Region Mooresville
Page 1 of 14

Briefly describe the proposed permitting action and facility background:
Colonial Pipeline
NPDES Permit#NC009000 Summary
Colonial Pipeline has applied to the Division of Water Resources for a National Pollution Discharge
Elimination System(NPDES)permit. The proposed permit is required for full implementation of a fuel
recovery and groundwater remediation plan that would allow the discharge of treated groundwater to
North Prong Clark Creek in the Yadkin-Pee Dee River basin.
The proposed permit is part of enforcement actions undertaken by the Department of Environmental
Quality(DEQ)against Colonial Pipeline and outlined in a Consent Order resulting from the August 14,
2020 fuel spill in Mecklenburg County,N.C. Cleanup efforts and remediation have been ongoing,with
oversight by DEQ's Division of Waste Management. The Consent Order identifies Colonial Pipeline as
the responsible party for the spill and subsequent cleanup. The Consent order included a$4.75 million-
dollar civil penalty.
The permit application required an engineering alternatives analysis be undertaken to ensure the best
possible alternative for cleaning up the site is selected. Possible alternatives included:
1) connection to a publicly owner treatment works (POTW),
2)pumping and hauling the treated effluent offsite,
3) land application of treated wastewater,
4)reinjection of treated discharge back to groundwater,
5) and a surface water discharge.
Connection to Charlotte Water is prohibited by a sewer use ordinance. Pumping and hauling the treated
water would require approximately 115 trucks per day that will be operating 24 hours a day in a
residential area. The other alternatives were deemed technically infeasible due to engineering restrictions,
lack of available land, and
protection of groundwater. Thus,the identified best alternative would be a discharge to surface waters.
The groundwater remediation system includes a recovery well system, an oil/water separator with
skimmed storage tank for recovered oil, a bag filter bank, an air stripper unit,a thermal oxidizer unit or
granular activated carbon units, liquid phase granular activated carbon vessels, and an outfall structure.
The draft permit is crafted to protect all appropriate water quality standards by treating for identified
petroleum hydrocarbons,toxicants and chlorinated solvents present in the groundwater post spill. Initial
groundwater data reviewed for this application indicated that PFAS was not present above practical
quantitation limits.Additional data is being collected and analyzed for PFAs contaminant prior to
possible issuance of a final permit. Comments received during the public hearing process will be
incorporated into the final analysis and decision-making process.
*NPDES Permit Rating: The facility rates as a major NPDES permit with a score of 80 points on the EPA
NPDES Permit Rating Work Sheet. The Colonial Pipeline spill at Huntsville is a high-profile incident that
will require oversight by the EPA. See Attachments B.NC0090000 Facility Rating_20200913_p
Page 2 of 14

Treatment Units: A 0.576 MGD(including a 0.288 MGD temporary system)groundwater remediation
system consisting of,but not limited to;
• a recovery well system
• an oil/water separator
• skimmed LNAPL storage tank
• a bag filter bank
• an air stripper unit
• a thermal oxidizer unit or granular activated carbon units
• liquid phase granular activated carbon vessels
• an outfall structure that consists of connection to an existing corrugated metal pipe (CMP)
culvert with an Inserta Tee Fitting
SIC Codes. The SIC indicated on EPA Form 1 is 4619. OSHA defines this code as the following:
4619 Pipelines,Not Elsewhere Classified
Establishments primarily engaged in the pipeline transportation of commodities, except crude
petroleum,refined products of petroleum, and natural gas. Establishments primarily engaged in the
pipeline transportation of refined petroleum are classified in Industry 4613, and those engaged in
natural gas transmission are classified in Industry 4922.
• Coal pipeline operation
• Pipeline operation except petroleum and natural gas pipelines
• Slurry pipeline operation
SIC code 4619 appears to exclude refined products of petroleum. We believe SIC code 4613 for Refined
Petroleum Pipelines would be more applicable for this facility. SIC Code 4613 is defined as the
following:
4613 Refined Petroleum Pipelines
Establishments primarily engaged in the pipeline transportation of refined products of petroleum,
such as gasoline and fuel oil.
• Gasoline pipelines, common carriers
• Refined petroleum pipelines
2. Receiving Waterbody Information:
Receiving Waterbody Information
Outfalls/Receiving Stream(s): Outfall 001 /North Prong Clark Creek
Stream Segment: 13-17-4-1
Stream Classification: C
Drainage Area(mi2): 3.5
Summer 7Q 10(cfs) 0.25
Winter 7Q10(cfs): 0.42
30Q2 (cfs): 0.56
Average Flow(cfs): 3.9
IWC (%effluent): 78.1
Page 3 of 14

303(d) listed/parameter: No(Attachment B8)
Subject to TMDL/parameter: Yes- State wide Mercury TMDL implementation.
Basin/Sub-basin/HUC: Yadkin-Pee Dee/03-07-11 /030401050101
USGS Topo Quad: Cornelius,NC
3. Effluent Data Summary
Not Applicable,new discharge.
4. Instream Data Summary
Instream monitoring may be required in certain situations, for example: 1)to verify model predictions
when model results for instream DO are within 1 mg/l of instream standard at full permitted flow; 2)to
verify model predictions for outfall diffuser; 3)to provide data for future TMDL; 4)based on other
instream concerns. Instream monitoring may be conducted by the Permittee, and there are also
Monitoring Coalitions established in several basins that conduct instream sampling for the Permittee(in
which case instream monitoring is waived in the permit as long as coalition membership is maintained).
If applicable, summarize any instream data and what instream monitoring will be proposed for this
permit action:
Data for instream monitoring is provided in the latest report to the NC DEQ Division of Waste
Management. See Attachment H_June Monthly Report 20220630_2189p.
Surface water monitoring for the spill site consists of the following parameters: TPH(GRO),Benzene,
Toluene,Ethylbenzene,m,p-Xylene, o-Xylene,Xylene, Temperature,pH, ORP, Conductivity,DO,
Turbidity, and rain events. TPH(GRO),Benzene, Ethylbenzene,m,p-Xylene, o-Xylene, and Xylene were
all below the method detect levels. Toluene was detected only at location D13 [Seep-1(SW-Seep)].
Toluene was detected as 4 µg/L on 4/11/2021 and 6.7 µg/L on 5/5/5/2021. Charlotte-Mecklenburg Storm
Water Services(CMSWS) conducted their own investigation of surface waters in the area of the release
sampling on 3/19/2021,4/26/2021, 6/9/2021, and 7/2/2021. Total Lead was detected as 32.4 µg/L at Site
G(SW-G)and as 7.1 µg/L at Site H(Seep-1/SW-Seep). Instream Total Hardness data would be needed to
determine if these Lead results exceeded the water quality standard(02B) for Total Lead. Additionally,
Toluene was detected as 10.7 µg/L at Site G(SW-G). The 02B standard for Toluene is 11 µg/L.A
summary of the sampling locations by the Colonial Pipeline Company and CMSWS is provided in the
table below. Please note the sampling performed by the permittee and CMSWS was in response to release
incident 2020-L1-SR2448. These sampling locations are not directly related to the proposed outfall for
NPDES permit NC0090000.
Proposed Instream monitoring includes the following: Upstream Total Hardness sampling at SW-1/SD-1
which is North Prong Clark Creek Up-gradient of the leak site. The sampling location SW-1/SD-1 will
have the location ID of U01 for monitoring and reporting purposes in eDMR for NPDES permit
NC0090000.
Is this facility a member of a Monitoring Coalition with waived instream monitoring(YIN):NO.
Name of Monitoring Coalition:NA.
Page 4 of 14

5. Compliance Summary
Summarize the compliance record with permit effluent limits (past 5 years):NA,new permit.
Summarize the compliance record with aquatic toxicity test limits and any second species test results
(past 5 years): NA,new permit.
Summarize the results from the most recent compliance inspection: NA,new permit.
6. Water Quality-Based Effluent Limitations (WQBELs)
Dilution and Mixin Zones
ones
In accordance with 15A NCAC 213.0206,the following streamflows are used for dilution considerations
for development of WQBELs: 1 Q 10 streamflow(acute Aquatic Life); 7Q 10 streamflow(chronic Aquatic
Life;non-carcinogen HH); 30Q2 streamflow(aesthetics); annual average flow(carcinogen,HH).
If applicable, describe any other dilution factors considered(e.g., based on CORMIX model results):NA.
If applicable, describe any mixing zones established in accordance with 15A NCAC 2B.0204(b): NA.
Oxygen-Consuming Waste Limitations
Limitations for oxygen-consuming waste(e.g.,BOD) are generally based on water quality modeling to
ensure protection of the instream dissolved oxygen(DO)water quality standard. Secondary TBEL limits
(e.g., BOD=30 mg/l for Municipals)may be appropriate if deemed more stringent based on dilution and
model results.
Ifpermit limits are more stringent than TBELs, describe how limits were developed:NA.
Ammonia and Total Residual Chlorine Limitations
Limitations for ammonia are based on protection of aquatic life utilizing an ammonia chronic criterion of
1.0 mg/l(summer) and 1.8 mg/1(winter).Acute ammonia limits are derived from chronic criteria,
utilizing a multiplication factor of 3 for Municipals and a multiplication factor of 5 for Non-Municipals.
Limitations for Total Residual Chlorine(TRC)are based on the NC water quality standard for protection
of aquatic life(17 ug/1)and capped at 28 ug/1(acute impacts). Due to analytical issues, all TRC values
reported below 50 ug/l are considered compliant with their permit limit.
Describe any proposed changes to ammonia and/or TRC limits for this permit renewal:NA.
Reasonable Potential Analysis (RPA) for Toxicants
If applicable, conduct RPA analysis and complete information below.
Page 5 of 14

The need for toxicant limits is based upon a demonstration of reasonable potential to exceed water quality
standards, a statistical evaluation that is conducted during every permit renewal utilizing the most recent
effluent data for each outfall. The RPA is conducted in accordance with 40 CFR 122.44 (d) (i). The NC
RPA procedure utilizes the following: 1)95%Confidence Level/95%Probability; 2) assumption of zero
background; 3)use of/z detection limit for"less than"values; and 4) streamflows used for dilution
consideration based on 15A NCAC 2B.0206. Effective April 6,2016,NC began implementation of
dissolved metals criteria in the RPA process in accordance with guidance titled NPDES Implementation of
Instream Dissolved Metals Standards, dated June 10,2016.
A reasonable potential analysis was conducted using groundwater toxicant data that would be
representative of influent flow to the treatment system. This data was collected between 28Aug2020 and
03Jun2022. Pollutants of concern included toxicants with positive detections and associated water quality
standards/criteria. Based on this analysis,the following permitting actions are proposed for this permit:
• Effluent Limit with Monitoring. The following parameters will receive a water quality-based
effluent limit(WQBEL) since they demonstrated a reasonable potential to exceed applicable
water quality standards/criteria:
Total Lead
Benzene
Bromomethane(Methyl Bromide)
n-Butylbenzene
Ethylbenzene
Hexachloro-1,3-butadiene
Naphthalene
n-Propylbenzene
Tetrachloroethene(Tetrachloroethylene) (PERC)
Toluene
1,2,4-Trimethylbenzene
1,3,5-Trimethylbenzene
Vinyl chloride
Xylenes, Total(mix of m+o+p)
• Monitoring Only. The following parameters will receive a monitor-only requirement since they
did not demonstrate reasonable potential to exceed applicable water quality standards/criteria,but
the maximum predicted concentration was>50%of the allowable concentration:
Bromodichloromethane(Dichlorobromomethane)
Chloromethane(Methyl Chloride)
• No Limit or Monitoring(except for Quarterly pollutant scan by EPA 624.1 & 625.1). The
following parameters will not receive a limit or monitoring since they did not demonstrate
reasonable potential to exceed applicable water quality standards/criteria and the maximum
predicted concentration was<50%of the allowable concentration. Parameters also did not receive
a limit or monitoring if there were no detects(i.e. not present in groundwater). Parameters with
detects that did not have applicable standards, criteria, or TBELs will be monitored with pollutant
scans (EPA Methods 624&625).
Bromobenzene
Bromochloromethane
Bromoform
sec-Butylbenzene
tert-Butylbenzene
Carbon tetrachloride
Chlorobenzene
Page 6 of 14

Chloroform(Tricholomethane)
2-Chlorotoluene
4-Chlorotoluene
1,2-Dibromo-3-chloropropane(Nemagon)
Dibromochloromethane(Chlorodibromomethane)
1,2-Dibromoethane(EDB)
Dibromomethane
1,2-Dichlorobenzene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
Dichlorodifluoromethane
1,1-Dichloroethane
1,1-Dichloroethene
cis-1,2-Dichloroethene
trans-1,2-Dichloroethene
1,2-Dichloropropane
1,3-Dichloropropane
2,2-Dichloropropane
1,1-Dichloropropene
cis-1,3-Dichloropropene
trans-1,3-Dichloropropene
Diisopropyl ether(Isopropyl Ether)
Isopropylbenzene(Cumene)
Methylene Chloride
Styrene
1,1,1,2-Tetrachloroethane
1,1,2,2-Tetrachloroethane 1,2,3-Trichlorobenzene
1,2,4-Trichlorobenzene
1,1,1-Trichloroethane
1,1,2-Trichloroethane
Trichloroethene
Trichlorofluoromethane(Freon 11)
1,2,3-Trichloropropane(1,2,3-TCP)
n-Butanol
Ethanol
Ethyl-tert-butyl ether
tert-Amyl Alcohol
tert-Amylmethyl ether
tert-Butyl Alcohol
• Pollutant of Concern(Effluent Limit with monitoring). The following parameter had no data,but
is a pollutant of concern for petroleum product groundwater contamination:
Total Phenolic Compounds
• Pollutant of Concern(Monitoring Only)—The following parameters that were detected did not
show reasonable potential to exceed applicable water quality standards/criteria,but are known
pollutants of concern for petroleum product groundwater contamination:
1,2-Dichloroethane
Methyl-tert-butyl ether(MTBE)
• The following parameters evaluated in the RPA will be monitored for with the O&G TBEL:
C5 - C8 Aliphatics
C9 - C12 Aliphatics
Page 7 of 14

C9 - C10 Aromatics
VPH(Total)
If applicable, attach a spreadsheet of the RPA results as well as a copy of the Dissolved Metals
Implementation Fact Sheet for freshwater/saltwater to this Fact Sheet. Include a printout of the RPA
Dissolved to Total Metal Calculator sheet if this is a Municipality with a Pretreatment Program.
RPA Comments: The groundwater data for toxicants is very extensive at the Huntersville spill site. The
greatest 58 detections for each parameter were entered into the RPA spreadsheets. Limits were assigned
to all pollutants of concern that showed RP with predicted concentrations greater than 50%of the
allowable concentrations. See following attached RPA sheets for details:
C. NC009000_RPA
1. NC009000_GW DATA_FW RPA_5p
2. Diss metals Implementation-Fact Sheet Info 5-16-16 (Grzyb, Julie)_20220825_4p
3. NC009000_GW DATA_GENERIC RPA—Part 1
4. NC009000 GW DATA GENERIC RPA Part 2
5. NC009000 GW DATA GENERIC RPA Part 3
6. NC009000 GW DATA GENERIC RPA Part 4
Toxicity Testing Limitations
Permit limits and monitoring requirements for Whole Effluent Toxicity(WET)have been established in
accordance with Division guidance(per WET Memo, 8/2/1999). Per WET guidance, all NPDES permits
issued to Major facilities or any facility discharging"complex"wastewater(contains anything other than
domestic waste)will contain appropriate WET limits and monitoring requirements,with several
exceptions. The State has received prior EPA approval to use an Alternative WET Test Procedure in
NPDES permits,using single concentration screening tests,with multiple dilution follow-up upon a test
failure.
Describe proposed toxicity test requirement: Whole Effluent Toxicity(WET) -Acute,Monitor Only;
Quarterly(Pimephales promelas)48-hour static test. [See Section A. (3)]. Acute toxicity(monitoring
only)is recommended because the final effluent is to be polished with activated carbon. [WQBEL.No
toxics in toxic amounts. 15A NCAC 213.0200 and 15A NCAC 213.0500(not limited).]
Mercury Statewide TMDL Evaluation
There is a statewide TMDL for mercury approved by EPA in 2012. The TMDL target was to comply
with EPA's mercury fish tissue criteria(0.3 mg/kg)for human health protection. The TMDL established a
wasteload allocation for point sources of 37 kg/year(81 lb/year), and is applicable to municipals and
industrial facilities with known mercury discharges. Given the small contribution of mercury from point
sources (^2%of total load),the TMDL emphasizes mercury minimization plans(MMPs) for point source
control. Municipal facilities>2 MGD and discharging quantifiable levels of mercury(>1 ng/1)will
receive an MMP requirement. Industrials are evaluated on a case-by-case basis, depending if mercury is a
pollutant of concern. Effluent limits may also be added if annual average effluent concentrations exceed
the WQBEL value (based on the NC WQS of 12 ng/1) and/or if any individual value exceeds a TBEL
value of 47 ng/1
Describe proposed permit actions based on mercury evaluation:NA.
Page 8 of 14

Other TMDL/Nutrient Management Strategy Considerations
If applicable, describe any other TMDLs/Nutrient Management Strategies and their implementation
within this permit:NA.
Other WQBEL Considerations
If applicable, describe any other parameters of concern evaluated for WQBELs:
See the above Reasonable Potential Analysis (RPA)for Toxicants.
If applicable, describe any special actions (HQW or ORW) this receiving stream and classification shall
comply with in order to protect the designated waterbody:NA.
If applicable, describe any compliance schedules proposed for this permit renewal in accordance with
1 SA NCAC 2H.0107(c)(2)(B), 40CFR 122.47, and EPA May 2007 Memo:NA.
If applicable, describe any water quality standards variances proposed in accordance with NCGS 143-
215.3(e) and 15,4 NCAC 2B.0226 for this permit renewal:NA.
7. Technology-Based Effluent Limitations (TBELs)
Industrials(if not applicable, delete and skip to next Section)
Describe what this facility produces: No products are manufactured at this facility,groundwater remediation.
List the federal effluent limitations guideline (ELG)for this facility: There are no effluent limitations
guidelines and standards (ELGs)promulgated in the Code of Federal Regulations(CFR)for petroleum
pipelines. Therefore,NC water quality standards and EPA water quality criteria were evaluated for this
draft permit. 40 CFR 125.3(c)(2)provides that,where there are no applicable EPA effluent guidelines,
permit writers have the authority to develop technology-based limitations on a case-by-case basis under
section 402(a)(1)(B) of the Clean Water Act. This is provided that there are no applicable water quality-
based limits or criteria available for a pollutant of concern. Parameters listed in the table below were
developed under this best professional judgement.
If the ELG is based on production or flow, document how the average production/flow value was
calculated:NA
For ELG limits, document the calculations used to develop TBEL limits: The limits in the Table below are
based the effluent guidelines as indicated. Since these limits are concentration based and not flow or
production based, calculations were not required to develop these TBELs. See BPJ discussion below.
Table. TBEL Development
Monthly Daily
Pollutant ELG Average Maximum
Limit Limit
(mg/L) m /L
Point Source Category: Petroleum Refining
Oil&Grease *CFR 419.32/419.34; Subpart C—Petrochemical&423: 15.0 mg/L* 20.0 mg/L
Steam Electric Power Generating(includes MA 20 mg/L)
Page 9 of 14

Level of Control: BPTBCT
Process: Contaminated runoff
Treatment Technology/Treatment Train: Best Management
Practices
Other parameters:
Point Source Category: Organic Chemicals,Plastic and
Synthetic Fibers(OCPSF)
CFR 414.74; Subpart G—Bulk Organic Chemicals
Chloroethane Level of Control:NSPS 110 µg/L 295 µg/L
Process: Bulk organic chemicals
Treatment Technology/Treatment Train: Stripping+Granular
Activated Carbon
TSS Secondary treatment standards/40 CFR 133 / 15A NCAC 2B 30.0 mg/L 45.0 mg/L
.0406
O&G will monitor for TPH which would include the following parameters evaluated in the RPA:
C5 - C8 Aliphatics, C9 - C12 Aliphatics, C9 - C10 Aromatics, and VPH(Total)
If any limits are based on best professional judgement(BPJ), describe development: 40 CFR 125.3(c)(2)
provides that,where there are no applicable EPA effluent guidelines,permit writers have the authority to
develop technology-based limitations on a case-by-case basis under section 402(a)(1)(B)of the Clean
Water Act. See discussion above in this section.
Document any TBELs that are more stringent than WQBELs: Oil&Grease has a narrative standard found
in 15A NCAC 2B .0200. There are no numerical values set for Oil&Grease for WQBELSs criteria.
Document any TBELs that are less stringent than previous permit:NA
8. Antidegradation Review (New/Expanding Discharge):
The objective of an antidegradation review is to ensure that a new or increased pollutant loading will not
degrade water quality. Permitting actions for new or expanding discharges require an antidegradation
review in accordance with 15A NCAC 2B.0201. Each applicant for a new/expanding NPDES permit
must document an effort to consider non-discharge alternatives per 15A NCAC 2H.0105(c)(2). In all
cases, existing instream water uses and the level of water quality necessary to protect the existing use is
maintained and protected.
If applicable, describe the results of the antidegradation review, including the Engineering Alternatives
Analysis (EAA) and any water quality modeling results: The EAA was reviewed on 08/26/2022. The
following alternatives were cost prohibitive:
• Connection to POTW: Prohibited by sewer use ordinance.
• Land Application: Technically infeasible due to engineering restrictions, lack of available land,
and protection of groundwater.
Page 10 of 14

• Infiltration Galleries: Technically infeasible due to engineering restrictions, lack of available
land, and protection of groundwater.
• Closed-Loop Groundwater Remediation Wells: Technically infeasible due to engineering
restrictions, lack of available land, and protection of groundwater.This alternative is technically
infeasible because of the goal of the long-term operation of the recovery wells is to create a
hydraulic barrier to prevent free product and VOCs from migrating further downgradient from the
initial release location.
• In-Situ Groundwater Remediation Wells: This alternative is technically infeasible because of the
goal of the long-term operation of the recovery wells is to create a hydraulic barrier to prevent
free product and VOCs from migrating further downgradient from the initial release location.
• Pump&Haul: Pumping and hauling the treated water would require approximately 115 trucks
per day that will be operating 24 hours a day in a residential area. Cost estimate is $594,857,305.
• Surface Water Discharge: The cost for surface water discharge (NPDES)was estimated to be
$23,106,669.
9. Antibacksliding Review:
Sections 402(o)(2)and 303(d)(4)of the CWA and federal regulations at 40 CFR 122.44(1)prohibit
backsliding of effluent limitations in NPDES permits. These provisions require effluent limitations in a
reissued permit to be as stringent as those in the previous permit,with some exceptions where limitations
may be relaxed(e.g.,based on new information,increases in production may warrant less stringent TBEL
limits, or WQBELs may be less stringent based on updated RPA or dilution).
Are any effluent limitations less stringent than previous permit(YES/NO):NA,new permit.
If YES, confirm that antibacksliding provisions are not violated:NA
10. Monitoring Requirements
Monitoring frequencies for NPDES permitting are established in accordance with the following
regulations and guidance: 1) State Regulation for Surface Water Monitoring, 15A NCAC 213.0500;2)
NPDES Guidance,Monitoring Frequency for Toxic Substances(7/15/2010 Memo); 3)NPDES Guidance,
Reduced Monitoring Frequencies for Facilities with Superior Compliance(10/22/2012 Memo);4)Best
Professional Judgement(BPJ). Per US EPA(Interim Guidance, 1996),monitoring requirements are not
considered effluent limitations under Section 402(o)of the Clean Water Act, and therefore anti-
backsliding prohibitions would not be triggered by reductions in monitoring frequencies.
For instream monitoring,refer to Section 4.
11. Electronic Reporting Requirements
The US EPA NPDES Electronic Reporting Rule was finalized on December 21,2015. Effective
December 21, 2016,NPDES regulated facilities are required to submit Discharge Monitoring Reports
(DMRs) electronically. While NPDES regulated facilities would initially be required to submit additional
NPDES reports electronically effective December 21,2020,EPA extended this deadline from December
21,2020,to December 21, 2025. The current compliance date, effective January 4,2021,was extended as
a final regulation change published in the November 2, 2020,Federal Register. This permit contains the
requirements for electronic reporting, consistent with Federal requirements.
Page 11 of 14

12.Summary of Proposed Permitting Actions:
A. Table. Current Permit Conditions and Proposed Changes 0.576 MGD
Parameter Proposed Basis for Condition/Change
Condition
Flow MA MGD 0.576 15A NCAC 213 .0505
Total Suspended Solids (TSS) MA 30.0 mg/1 TBEL. Secondary treatment standards/40 CFR 133 / 15A
DM 45.0 mg/1 NCAC 2B .0406
WQBEL. State WQ Narrative Standard 15A NCAC 02B
Oil&Grease .0221 (12)
(EPA Method 1664 [SGT- MA 15.0 mg/1
HEM]) DM 20.0 mg/1 BPJ for TBEL. 40 CFR 125.3(c)(2)on a case-by-case basis
under section 402(a)(1)(B)CWA..
pH 6-9 SU WQBEL. State WQ standard, 15A NCAC 02B .0200
Hardness-Total as M&R WQBEL. State WQ standard, 15A NCAC 02B .0200
[CaCO3 or(Ca+Mg)]
Total Lead MA 5.26 µg/L WQBEL. State WQ standard, 15A NCAC 02B .0200
DM 125 µg/L
Benzene MA 274 µg/L WQBEL. State WQ standard, 15A NCAC 02B .0200
DM 274 µg/L
MA 15.4 µg/L North Carolina In-Stream Target Values for Surface Waters
Naphthalene DM 15.4 µg/L established per language in 15A NCAC 02B .0202 & .0208
MA 124 µg/L North Carolina In-Stream Target Values for Surface Waters
Ethyl Benzene DM 124 µg/L established per language in 15A NCAC 02B .0202 & .0208
Toluene MA 14.1 µg/L WQBEL. State WQ standard, 15A NCAC 02B .0200
DM 14.1 µg/L
MA 858 µg/L North Carolina In-Stream Target Values for Surface Waters
Xylenes (Total) DM 858 µg/L established per language in 15A NCAC 02B .0202 & .0208
Bromomethane MA 0.05 µg/L North Carolina In-Stream Target Values for Surface Waters
(Methyl Bromide) DM 0.05 µg/L established per language in 15A NCAC 02B .0202 & .0208
MA 4.99 µg/L North Carolina In-Stream Target Values for Surface Waters
n-Butylbenzene DM 4.99 µg/L established per language in 15A NCAC 02B .0202 & .0208
MA 104 µg/L BPJ for TBEL. 40 CFR 125.3(c)(2)on a case-by-case basis
Chloroethane DM 268 µg/L under section 402(a)(1)(B)CWA.
Hexachloro-1,3-butadiene MA 96.6 µg/L, WQBEL. State WQ standard, 15A NCAC 02B .0200
(Hexachlorobutadiene) DM 96.6 µg/L
MA 102 µg/L North Carolina In-Stream Target Values for Surface Waters
n-Propylbenzene DM 102 µg/L established per language in 15A NCAC 02B .0202 & .0208
Page 12 of 14

MA 17.7 µg/L WQBEL. State WQ standard, 15A NCAC 2B .0200
Tetrachloroethene(PERC) DM 17.7 µg/L
1,2,4-Trimethylbenzene
MA 499 µg/L North Carolina In-Stream Target Values for Surface Waters
DM 499 µg/L established per language in 15A NCAC 02B .0202 & .0208
MA 275 µg/L North Carolina In-Stream Target Values for Surface Waters
1,3,5-Trimethylbenzene DM 275 µg/L established per language in 15A NCAC 02B .0202 & .0208
Vinyl chloride MA 12.9 µg/L WQBEL. State WQ standard, 15A NCAC 02B .0200
(Chloroethylene) DM 12.9 µg/L
Total Recoverable Phenolics MA 489 µg/L WQBEL. State WQ standard, 15A NCAC 02B .0200
(EPA Method 420.1) DM 489 µg/L
Bromodichloromethane North Carolina In-Stream Target Values for Surface Waters
(Dichlorobromomethane) M&R established per language in 15A NCAC 02B .0202 & .0208
Chloromethane North Carolina In-Stream Target Values for Surface Waters
(Methyl Chloride) M&R established per language in 15A NCAC 02B .0202 & .0208
EPA National Recommended Water Quality Criteria for
1,2-Dichloroethane(1,2 DCA) M&R Aquatic Life&Human Health
Methyl Tert-Butyl Ether North Carolina In-Stream Target Values for Surface Waters
(MTBE) M&R established per language in 15A NCAC 02B .0202 & .0208
Organics, Total Purgeables
(VOCs) (EPA Method 624.1) M&R 40 CFR 122
Base Neutrals&Acids(Semi-
VOCs)(EPA Method 625.1) M&R 40 CFR 122
Additional Monitoring Add Special G.S. 143-215.1(B)
Condition for
Requirements EPA Methods
624 and 625.
Acute WQBEL. No toxics in toxic amounts. 15A NCAC 2B.0200
Toxicity Test monitoring, and 15A NCAC 2B.0500
90% effluent
Add
Electronic
Electronic Reporting Reporting In accordance with EPA Electronic Reporting Rule 2015.
Special
Condition
MGD—Million gallons per day,MA—Monthly Average,WA—Weekly Average,DM—Daily Max.
M&R—Monitoring&Report
Page 13 of 14

13. Public Notice Schedule:
Permit to Public Notice: 09/23/2022.
Per 15A NCAC 2H .0109 & .0111, The Division will receive comments for a period of 30 days following
the publication date of the public notice. Any request for a public hearing shall be submitted to the
Director within the 30 days comment period indicating the interest of the party filing such request and the
reasons why a hearing is warranted.
14. Fact Sheet Addendum (if applicable):
Were there any changes made since the Draft Permit was public noticed(Yes/No): This is a DRAFT
FACTSHEET
If Yes, list changes and their basis below: This is a DRAFT FACTSHEET.
15. Fact Sheet Attachments (if applicable):
A. Application,Additional Information Received and Reports
1. NC0090000_Application_20210818_49p.
https://edocs.deq.nc.gov/WaterResources/DocView.aspx?id=1955816&dbid=0&repo=WaterResources
2. NC0090000_More Information(Received)_20211222_225p
hgps:Hedocs.deq.nc.gov/WaterResources/DocView.aspx?id=2466450&dbid=0&repo=WaterResources
3. NC0090000_More Information(Received)_20220714_17p
https://edocs.deq.nc.gov/WaterResources/DocView.aspx?id=2449622&dbid=0&repo=WaterResources
4. NC0090000_More Information(Received)_20220808_47p
hgps:Hedocs.deq.nc.gov/WaterResources/DocView.aspx?id=2489753&dbid=0&repo=WaterResources
5. NC0090000_More Information(Received)_20220810_12p
hgps:Hedocs.deq.nc.,gov/WaterResources/DocView.aspx?id=2449624&dbid=0&repo=WaterResources
6. NC0090000_More Information(Received)_20220810(2)_5p
htips:Hedocs.deq.nc.gov/WaterResources/DocView.aspx?id=2449625&dbid=0&repo=WaterResources
7. NCO090000_More Information(Received)_20220818_133p
htips:Hedocs.deq.nc.gov/WaterResources/DocView.aspx?id=2466344&dbid=0&repo=WaterResources
8. June Monthly Report 20220630_2189p
htlps:Hdeq.nc.gov/media/30577/download?attachment
B. NCO090000_Permit Rating Sheet_20220913_20220913_15p
C. NCO09000_RPA
1. NCO09000_GW DATA_FW RPA_5p
2. Diss metals Implementation-Fact Sheet Info 5-16-16 (Grzyb, Julie)_20220825_4p
3. NCO09000_GW DATA_GENERIC RPA_Part 1
4. NCO09000_GW DATA_GENERIC RPA_Part 2
5. NCO09000 GW DATA GENERIC RPA Part 3
6. NC009000 GW DATA GENERIC RPA Part 4
For other Colonial Pipeline Spill Information-Huntersville including correspondence,background,
emergency response, data,results,required report, etc.please see the DEQ DWM webpage:
https://deq.nc.gov/about/divisions/waste-management/underground-storage-tanks-section/colonial-
pipeline-spill-information-huntersville-nc
Page 14 of 14

NPDES Permit Rating Work Sheet ✓❑Regular Addition
❑Discretionary Addition
Score change,but no
NPDES No.: NCO090000 status change
Facility Name: ❑Deletion
Colonial Pipeline Company- 2020-L1-SR2448
City:Huntersville, NC
Receiving Water: North Prong Clark Creek [Stream Index 13-17-4-1] [HUC: 030401050101]
Reach Number:
Is this facility a steam electric power plant(SIC=4911) Is this permit for a municipal separate storm sewer
with one or more of the following characteristics? serving a population greater than 100,000?
1. Power output 500 MW or greater(not using a cooling pond/lake) ❑YES;score is 700(stop here)
2.A nuclear power plant
3.Cooling water discharge greater than 25%of the receiving stream's 7Q10 flow rate ✓❑NO(continue)
❑YES;score is 600(stop here) ✓❑NO(continue)
FACTOR 1:Toxic Pollutant Potential
PCS SIC Code: Primary SIC Code: 4613
Other SIC Codes:
Industrial Subcategory Code: 0 (Code 000 if no subcategory)
Determine the Toxicity potential from Appendix A. (Be sure to use the TOTAL toxicity potential column and check one)
Toxicity Group Code Points Toxicity Group Code Points Toxicity Group Code Points
No process ❑3. 3 15 7 7 35
❑waste streams 0 0 B. 4 20 8. 8 40
❑1. 1 5 ❑5. 5 25 9. 9 45
❑2. 2 10 6. 6 30 10. 10 50
Code Number Checked: 9
Total Points Factor 1: 45
FACTOR 2: Flow/Stream Flow Volume (Complete either Section A or Section B;check only one)
Section A-Wastewater Flow Only Considered Section B-Wastewater and Stream Flow Considered
Wastewater type Code Points Wastewater type Percent of Instream
(See Instructions) (See Instructions) Wastewater Concen-
Type I: Flow<5 MGD 11 0 tration at Receiving
Flow 5 to 10 MGD 12 10 Stream Low Flow Code Points
Flow>10 to 50 MGD 13 20
Flow>50 MGD 14 30 Type 1/III: <10% 41 0
>10%to<50% 42 10
Type II: Flow<1 MGD 21 10 >50% ✓ 43 20
Flow 1 to 5 MGD 22 20
Flow>5 to 10 MGD 23 30 Type II <10% 51 0
Flow>10 MGD 24 50 >10%to<50% 52 20
>50% ❑ 53 30
Type III: Flow<1 MGD 31 0
Flow 1 to 5 MGD 32 10
Flow>5 to 10 MGD 33 20
Flow>10 MGD 34 30
Code Checked from Section A or B: 43
Total Points Factor 2: 20
1

NPDES Permit Rating Work Sheet
FACTOR 3: Conventional Pollutants NPDES No.: NCO090000
(only when limited by the permit)
A. Oxygen Demanding Pollutants (check one)❑BOD❑COD❑OTHER:
Code Points
Permit Limits(check one) <100lbs/day 1 0
100 to 1000 Ibs/day 2 5
>1000 to 3000 Ibs/day 3 15
>3000lbs/day 4 20
Code Checked:
Points Scored: 0
B.Total Suspended Solids (TSS)
Code Points
Permit Limits(check one) <100 Ibs/day 1 0
✓ 100 to 1000 Ibs/day 2 5
>1000 to 5000 Ibs/day 3 15
❑ >5000lbs/day 4 20
Code Checked: 2
Points Scored: 5
C. Nitrogen Pollutants (check one) ❑ Ammonia ❑ OTHER:
Nitrogen Equivalent Code Points
Permit Limits(check one) <300 Ibs/day 1 0
300 to 1000 Ibs/day 2 5
>1000 to 3000 Ibs/day 3 15
>3000lbs/day 4 20
Code Checked:
Points Scored: 0
Total Points Factor 3:
FACTOR 4: Public Health Impact
Is there a public drinking water supply located within 50 miles downstream of the effluent discharge (this includes any body of
water to which the receiving water is a tributary)? A public drinking water supply may include infiltration galleries, or other
methods of conveyance that ultimately get water from the above referenced supply.
❑YES (if yes, check toxicity potential number below)
WINO (if no, go to Factor 5)
Determine the human health toxicity potential from Appendix A. Use the same SIC Code and subcategory reference as in
Factor 1. (Be sure to use the human health toxicity group column and check one below)
Toxicity Group Code Points Toxicity Group Code Points Toxicity Group Code Points
3. 3 0 7. 7 15
❑ No process
waste streams 0 0 4. 4 0 8. 8 20
❑1. 1 0 5. 5 5 9. 9 25
❑2. 2 0 6. 6 10 10. 10 30
Code Number Checked:
Total Points Factor 4:
2

NPDES Permit Rating Work Sheet
FACTOR 5: Water Quality Factors NPDES No.: NCO090000
A. Is (or will) one or more of the effluent discharge limits based on water quality factors of the receiving stream (rather than
technology-based federal effluent guidelines, or technology-based state effluent guidelines), or has a wasteload allocation
been assigned to the discharge?
Code Points
-, YES 1 10
FINO 2 0
B. Is the receiving water in compliance with applicable water quality standards for pollutants that are water quality limited in the
permit?
Code Points
✓ YES 1 0
❑NO 2 5
c. Does the effluent discharged from this facility exhibit the reasonable potential to violate water quality standards due to whole
effluent toxicity?
Code Points
YES 1 10
VINO 2 0 Code Number Checked:A. 1 B. 2 C. 2
Total Points Factor 5 A. 10 +g 0 +C. 0 = 0
FACTOR 6: Proximity to Near Coastal Waters
A. Base Score:Enter flow code here (from Factor 2): 43 Enter the multiplication factor that corresponds
to the flow code: 0.00
Check appropriate facility HPRI Code(from PCS):
HPRI# Code HPRI Score Flow code Multiplication Factor
1 1 20 11,31,or41 0.00
12,32,or 42 0.05
2 2 0 13,33,or 43 0.10
14 or 34 0.15
3 3 30 21 or 51 0.10
4 4 0 22 or 52 0.30
23 or 53 0.60
5 5 20 24 1.00
HPRI Code Checked:
Base Score(HPRI Score) 0 x(Multiplication Factor) 0.00 = 0 (Total Points)
B. Additional Points—NEP Program c. Additional Points— Great Lakes Area of Concern
For a facility that has an HPRI code of 3,does the facility For a facility that has an HPRI code of 5,does the facility
discharge to one of the estuaries enrolled in the National discharge any of the pollutants of concern into one of the
Estuary Protection(NEP)program(see instructions)or Great Lakes'31 areas of concern(see instructions)?
the Chesapeake Bay?
Code Points Code Points
YES 1 10 YES 1 10
NO 2 0 ❑NO 2 0
Code Number Checked:A. B. C.
Total Points Factor 6 A. 0 +B, 0 +C. 0 = 0
3

NPDES Permit Rating Work Sheet
Score Summary NPDES No.: NCO090000
Factor Description Total Points
1. Toxic Pollutant Potential 45
2. Flow/Streamflow Volume 20
3. Conventional Pollutants 5
4. Public Health Impacts 0
5. Water Quality Factors 10
6. Proximity to Near Coastal Waters 0
TOTAL(Factors 1 through 6) 80
S1. Is the total score equal to or greater than 80? ❑YES(Facility is a major) ✓❑ NO
S2. If the answer to the above question is no,would you like this facility to be discretionary major?
✓❑ NO
❑YES(Add 500 points to the above score and provide reason below:
Reason: The Colonial Pipeline spill at Huntsville is a high profile incident that will require
oversight by the EPA.
NEW SCORE: 80
OLD SCORE:
Derek Denard
Permit Reviewer's Name
[phone]
Phone Number
09/13/2022
Date
Reset Form
4

Attachment 132: NCO090000 Facility Rating Notes
FACTOR 1: Toxic Pollutant Potential
Review of applicable SIC codes from OSHA SIC codes manual https://www.osha.gov/data/sic-manual
Division E: Transportation, Communications,Electric, Gas,And Sanitary Services
Major Group 46: Pipelines,Except Natural Gas: This major group includes establishments
primarily engaged in the pipeline transportation of petroleum and other commodities, except
natural gas. Pipelines operated by petroleum producing or refining companies and separately
reported are included. Establishments primarily engaged in natural gas transmission are
classified in Industry 4922.
4612 Crude Petroleum Pipelines: Establishments primarily engaged in the pipeline
transportation of crude petroleum.Field gathering lines are classified in Mining,Major
Group 13.
• Crude petroleum pipelines
4613 Refined Petroleum Pipelines: Establishments primarily engaged in the pipeline
transportation of refined products of petroleum, such as gasoline and fuel oil.
• Gasoline pipelines, common carriers
• Refined petroleum pipelines
4619 Pipelines,Not Elsewhere Classified: Establishments primarily engaged in the
pipeline transportation of commodities, except crude petroleum,refined products of
petroleum, and natural gas. Establishments primarily engaged in the pipeline
transportation of refined petroleum are classified in Industry 4613,and those engaged in
natural gas transmission are classified in Industry 4922.
• Coal pipeline operation
• Pipeline operation except petroleum and natural gas pipelines
• Slurry pipeline operation
Division F: Wholesale Trade:
Major Group 51: Wholesale Trade-non-durable Goods. This major group includes
establishments primarily engaged in the wholesale distribution of non-durable goods.
5171 Petroleum Bulk stations and Terminals: Establishments primarily engaged in the
wholesale distribution of crude petroleum and petroleum products, including liquefied
petroleum gas, from bulk liquid storage facilities.
• Petroleum bulk stations and terminals-wholesale
Attachment B3: Worksheet-NPDES-PermitRating-Ss-EPAmemo-AppendixA-1990-Jun27 41:
The NPDES application indicated a SIC code of 4619 for Pipeline,Not Else Classified.
The best for the Colonial Pipeline would be SIC code 4613 for Refined Petroleum

Pipelines. There is not a total toxicity number given for 4613. Page 41 of Attachment B3
gives the SIC code of 4612 for Crude Petroleum Pipelines which has the total toxicity
number of 8. Petroleum Bulk Stations &Terminals SIC 5171 is also given a total toxicity
number of 8. Petroleum Bulk Stations &Terminals store refined petroleum. Considering
these similar SIC codes, a total toxicity number of 8 will be used to rate the Colonial
Pipeline groundwater remediation system. It should also be noted that chlorinated solvents
are present at the spill site. The SIC code 2869 for industrial organic chemicals,not
elsewhere classified, is given a total toxicity of 9 (commodity&bulk)and 10 (organic
pesticide chemicals mfg). The manufacture of the many of the solvents present are listed
under SIC code 2869. There are no SIC codes for the transportation of chlorinated
solvents. Petroleum refining SIC code 2911 is given total toxicity number of 9.
The toxicity group was checked with code 8 giving 40 points.
FACTOR 2: Flow/Stream Flow Volume
Attachment 134: NC0090000 RPA Calculation of IWC:
The RPA spreadsheet indicates an IWC of 78.12%based on a flow of 0.576 MGD and
summer 7Q 10 of 0.25 cs£
Attachment B5: Worksheet-NPDES-PermitRating-Ss-EPAmemo-AppendixA-1990-Jun27 9:
Does discharge contain only noncontact cooling water?No
Does discharge contain only process wastewater?No
Does discharge contain neither noncontact cooling water nor process wastewater?Yes,
Type III.
Section B Type I/III was selected for the precent of instream wastewater concentration at
receiving stream low flow of>50%with code 43 giving 20 points.
FACTOR 3: Conventional Pollutants
There are no oxygen demanding pollutants of concern.
TSS will be given secondary treatment standards of 30 mg/1 for a month average limit and 45
mg/l for a daily maximum limit. Loading is calculated using the Attachment B6_EPA rating BOD
TSS TN calculations spread sheet. Converting 30 mg/1 to lbs/day using a flow of 0.576 MGD
gives 144.2 lbs/day. Selected 100 to 1000 lbs/day Code 2 for 5 points.
There will be no limitation of nitrogen pollutants.
FACTOR 4: Public Health Impact
Attachment 137: Nearest Water Supply Waters ArcGIS Online:
The nearest waters currently classified as water supply waters is located>>45.1 miles
downstream from the proposed outfall.
Answer"No"for greater than 50 miles.

FACTOR 5: Water Quality Factors
A. Is (or will)one or more of the effluent discharge limits based on water quality factors of the
receiving stream(rather than technology-based federal effluent guidelines, or technology-
based state effluent guidelines), or has a wasteload allocation been assigned to the discharge?
Effluent limits will be based on water quality factors of the receiving stream. Yes, Code 1 for
10 points.
B. Is the receiving water in compliance with applicable water quality standards for pollutants
that are water quality limited in the permit?North Prong Clarke Creek[13-17-4-1] (Outfall
001) and South Prong Clarke Creek[13-17-4-2] (Seeps 1 &2 as identified by the applicate)
are not currently listed as impaired. See Attachment
B8_NC_2020_INTEGRATED_REPORT p 1305. The streams are tributary to Clark Creek.
The segment [13-17-4] for Clark Creek, immediately downstream(— 1 mile)at the
confluence of the two tributaries, is impaired for Fair, Poor or Severe Bio classification for
Fish Community. See Attachment B9_NC_2020_Category5_303dlist p 182. and Attachment
B 10_NC DRAFT 2020 INTEGRATED REPORT VIEWER. (Please note that this
information has not changed for the 2022 Integrated Report or 2022 303d Listing.) Since
there is no impairment for parameters that are water quality limited the answer is: Yes, Code
1 for 0 points.
C. Does the effluent discharged from this facility exhibit the reasonable potential to violate
water quality standards due to whole effluent toxicity?This is a new groundwater
remediation discharge with no effluent available for an RPA.Answer:No, Code 2 for 0
points.
FACTOR 6: Proximity to Near Coastal Waters. Parts A,B and C are not applicable. The facility is not
located near coastal waters.

APPENDIX A
SIC Code Cross Reference
and Tota( and Hunan Health Toxicity Number
1972/ Hunan
1977 1987 CFR Health Total Industr
SIC SIC 1987 CFR Sub- Sub-part title Toxicity Toxicity Subcat
Code Code Title Part Part Munger Munber Number
3914 3914 SILVERWARE AND PLATED WARE MR NO ELECTROPLATING 1 1 99
3915 3915 JEWELERS' MATERIALS i LAPIDARY WORK 433 A METAL FINISHING 1 9 0
3915 3915 JEWELERS' MATERIALS Z LAPIDARY WORK MR NO ELECTROPLATING 1 1 99
3931 3931 MUSICAL INSTRUMENTS MR NO ELECTROPLATING 1 1 99
3931 3931 MUSICAL INSTRUMENTS 433 A METAL FINISHING 1 .9 0
3942 3942 DOLLS MR 1 1 99
3944 3944 GAMES, TOYS AND CHILDREN'S VEHICLES 433 A METAL FINISHING 1 9 0
3944 3944 GAMES, TOYS AND CHILDREN'S VEHICLES MR NO ELECTROPLATING 1 1 99
3949 3949 SPORTING AND ATHLETIC GOODS, NEC 433 A METAL FINISHING 1 9 1
3949 3949 SPORTING AND ATHLETIC GOODS, NEC MR NO ELECTROPLATING 1 1 99
3949 3949 SPORTING AND ATHLETIC GOODS, NEC 433 A METAL FINISHING 1 1 2
3951 3951 PENS AND MECHANICAL PENCILS MR NO ELECTROPLATING 1 1 99
3951 3951 PENS AND MECHANICAL PENCILS 433 A METAL FINISHING 1 9 0
3952 3952 LEAD PENCILS AND ART GOODS MR 1 1 99
3953 3953 MARKING DEVICES MR 1 1 99
3955 3955 CARBON PAPER AND INKED RIBBONS MR 1 1 99
3961 3%1 COSTUME JEWELRY MR NO ELECTROPLATING 1 i 99
3%1 3961 COSTUME JEWELRY 433 A METAL FINISHING 1 9 0
3962 3499 ARTIFICIAL FLOWERS MR 1 1 99
3964 3%5 NEEDLES, PINS AND FASTENERS 433 A METAL FINISHING 1 9 0
3964 3965 NEEDLES, PINS AND FASTENERS MR NO ELECTROPLATING 1 1 99
3991 3991 BROOMS AND BRUSHES 433 A METAL FINISHING 1 9 0
3991 3991 BROOMS AND BRUSHES RR NO ELECTROPLATING 1 1 99
3993 3993 SIGNS AND ADVERTISING DISPLAYS 433 A METAL FINISHING 1 9 0
3993 3993 SIGNS AND ADVERTISING DISPLAYS MR 1 1 99
3993 3993 SIGNS AND ADVERTISING DISPLAYS MR NO ELECTROPLATING 1 1 99
3995 3995 BURIAL CASKETS MR NO ELECTROPLATING 1 1 99
3995 3995 BURIAL CASKETS 433 A METAL FINISHING 1 9 0
3996 3996 HARD SURFACE FLOOR COVERINGS MR 1 1 99
39% 3996 HARD SURFACE FLOOR COVERINGS 443 D LINOLEUM i PRINTED ASPHALT FELT 1 1 0
3999 3999 MANUFACTURING INDUSTRIES, NEC 433 A METAL FINISHING 1 9 0
3999 39" MANUFACTURING INDUSTRIES, NEC MR 1 1 99
4172 4173 BUS TERMINAL AND SERVICE FACILITIES MR 1 1 99
4226 4226 SPECIAL WAREHOUSING L STORAGE, NEC MR 1 1 99
4231 4231 TRUCKING TERMINAL FACILITIES 5 5 0
4469 4493 WATER TRANSPORTATION SERVICES, NEC 5 5 1
4469 4959 WATER TRANSPORTATION SERVICES, NEC 5 5 2
4469 4499 WATER TRANSPROTATION SERVICES, NEC 5 5 3
4612 4612 CRUDE PETROLEUM PIPELINES NR a a 0
4911 4911 ELECTRICAL SERVICES 423 A HYDRO ELECTRIC PWR GEN.(W/ SAW. WST.) 6 6 1
4911 4911 ELECTRICAL SERVICES 423 A STEAM ELECTRIC POWER GENERATING 6 6 2
4931 4931 ELECTRIC AND OTHER SERVICES COMBINED 423 A HYDRO ELECTRIC PWR. GEN. (W/ SAM. VST.) 6 6 1
4931 6931 ELECTRIC AMD OTHER SERVICES COMBINED 423 A STEM! ELECTRIC POWER GENERATING 6 6 7
4941 4941 WATER SUPPLY 7 7 0
4952 4952 SEWERAGE SYSTEMS 1 1 0
4953 4953 REFUSE SYSTEMS SOLID WASTE FACILITIES 7 7 1
4953 4953 REFUSE SYSTEMS HAZARDOUS WASTE TREATMENT FACILITIES 10 10 2
4959 4959 SANITARY SERVICES, NEC I 1 0
4961 4961 STEAM SUPPLY 1 1 0
5052 $052 COAL i OTHER MINERALS i ORES 8 a 0
5093 5093 SCRAP L WASTE MATERIALS 10 10 0
5143 5143 DAIRY PRODUCTS 405 A RECEIVING STATIONS 1 1 D
5161 5169 CHEMICALS AND ALLIED PRODUCTS 10 10 0
5171 5171 PETROLEUM SULK STATIONS L T:RMIMALS a a 0

Colonial Pipeline Company—2020-L1-SR2448 REASONABLE POTENTIAL ANALYSIS Outfall 001
NCO090000 2018 Generic RPA-95% Probability/95% Confidence Qw = 0.576 MGD
MAXIMUM DATA POINTS=58
Qw(MGD)= 0.5760 WWTP/WTP Class: PC-1
1Q10S(cfs)= 0.21 IWC% @ 1Q10S = 80.9575626
7Q10S(cfs)= 0.25 IWC% @ 7Q10S= 78.1239062
7Q10W(cfs)= 0.42 IW%C @ 7Q10W= 68.0073126
30Q2(cfs)= 0.56 IWC%@ 30Q2= 61.4537445
Avg.Stream Flow,QA(cfs)= 3.90 IWC%@ QA= 18.6279419
Receiving Stream: North Prong Clark Creek HUC 30401050101 Stream Class: C
PARAMETER NC STANDARDS OR EPA CRITERIA J REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION
TYPEApplied CY Chronic Standard Acute a n #Det. Max Pred Cw Allowable Cw
Acute:
0 0 N/A —Chr_
- on_ic: ---------------------------
Acute:
0 0 N/A —Chr_
- on_ic:---------- ----------------------------
Acute:
0 0 N/A —Chr_
- on_ic:---------------------------------------
Acute:
0 0 N/A —Chr_
- on_ic:---------- ----------------------------
Acute:
0 0 N/A —Chr_
- on_ic:---------------------------------------
Acute:
0 0 N/A
--Chronic:---------- ---------------------------
Acute:
0 0 N/A —Chr_
- on_ic:---------------------------------------
Acute:
0 0 N/A —Chr_
- on_ic:---------------------------------------
Acute:
0 0 N/A —Chr_
- on_ic:---------------------------------------
Acute:
0 0 N/A —Chr_
- on_ic:---------- ----------------------------
NCO090000 RPA,rpa
Page 1 of 1 8/22/2021

Figure 1
Wastewater Type Selection Flow Diagram
Start
Does discharge contain Yes
only noncontact Type
cooling water?
No
Does discharge contain
only process Yes Type II
wastewater?
No
Does discharge contain
neither noncontact Yes
cooling water nor Type III
process wastewaters?
No
Is process watewater
flow greater than Yes Type II
1 MGD?
No
Is process wastewater
flow greater than 10% Ye' Type e 11
of the total discharge?
No
Is noncontact cooling
water greater than 90% Ye' P. Type I
of the total discharge?
No
Type III
3

NC0090000
Limit
BOD 0 mg/I 0.000000 Ib/gal 0.0 lb/day
Flow 576,000 gpd
TSS 30 mg/I 0.000250 Ib/gal 144.2 lb/day
Flow 576,000 gpd
NH3 0 mg/I 0.000000 Ib/gal 0.0 lb/day
Flow 576,000 gpd

Measurement
�Ilr
L- marls 1
45.1 Miles1
Glear Surface Water Classifications:Yadkin Pee-Dee
fI itte Stream index: 1 3,-(15.5;
lrj,4-,-_
Stream Name: PEE DEE RIVER
Descr otion: From Norwood Dam to
mouth of Turkey Top Creek
ass;f.cat;on: WS-V,B
Date of Class.: August 2,1992
What does this More info
Class_mean?
r River Basin: Yadkin Pee-Dee
Pre�CTFL to enable snapping
17 + Zoom to ... r
Rock Hill

NORTH CAROLINA 2020 INTEGRATED REPORT
Rocky Yadkin-Pee Dee River Basin
AU Name AU Number Classification AU LengthArea AU Units
AU ID Description
North Prong Clarke Creek 13-17-4-1 C 4.4 FW Miles
2384 From source to Clarke Creek
2020 Draft Water Quality Assessments
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING
Benthos (Nar, AL, FW) 3a Data Inconclusive Not Rated Bioclassification
Hardy Creek 13-17-42 C 9.0 FW Miles
2385 From source to Rocky River
2020 Draft Water Quality Assessments
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING
Fish Community (Nar, AL, FW) 5 Exceeding Criteria Fair, Poor or Severe Bioclassificatior
South Prong Clarke Creek 13-17-4-2 C 3.5 FW Miles
2386 From source to Clarke Creek
2020 Draft Water Quality Assessments
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING
Benthos (Nar, AL, FW) 1 Meeting Criteria Excellent, Good, Natural, Good-Fair,
Ramah Creek 13-17-4-4 C 5.8 FW Miles
2393 From source to Clarke Creek
2020 Draft Water Quality Assessments
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING
Benthos (Nar, AL, FW) 1 Meeting Criteria Excellent, Good, Natural, Good-Fair,
Clarks Creek 13-17-5-2 C 4.4 FW Miles
2399 From source to Mallard Creek
2020 Draft Water Quality Assessments
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING
Benthos (Nar, AL, FW) 5 Exceeding Criteria Fair, Poor or Severe Bioclassificatior
7/21/2021 NC 2020 INTEGRATED REPORT Category 5 assessments approved by EPA June 23,2021 Page 1305 of 1334

NORTH CAROLINA 2020 303(D) LIST
Rocky Yadkin-Pee Dee River Basin
AU Name AU Number Classification Length or Area Units
AU ID Description
Little Richardson Creek(Lake Monroe) 13-17-36-4-( WS-IV 77.1 FW Acres
2321 From source to a point 0.6 mile upstream of Buck Branch
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR
Chlorophyll a (40 µg/I,AL, NC) 5 Exceeding Criteria Exceeding Criteria with Statistical
Confidence
Little Richardson Creek(Lake Monroe) 13-17-36-4-( WS-IV;CA 38.7 FW Acres
2322 From a point 0.6 mile upstream of Buck Creek to Richardson Creek
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR
Water Temperature(322C,AL, LP&CP) 5 Exceeding Criteria Exceeding Criteria with Statistical
Confidence
pH (9.0,AL, FW) 5 Exceeding Criteria Exceeding Criteria with Statistical 2018
Confidence
Chlorophyll a (40 µg/I,AL, NC) 5 Exceeding Criteria Exceeding Criteria with Statistical 2008
Confidence
Stewarts Creek 13-17-36-9-( WS-III 8.3 FW Miles
2334 From source to a point 0.4 mile downstream of mouth of Stumplick Branch
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR
Benthos(Nar,AL, FW) 5 Exceeding Criteria Fair, Poor or Severe Bioclassification 2008
Stewarts Creek [Lake Twitty(Lake Stewart)] 13-17-36-9-( WS-III;CA 1.1 FW Miles
2335 From a point 0.4 mile downstream of mouth of Stumplick Branch to Union County SR 1681 (City of
Monroe water supply intake)
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR
Chlorophyll a (40 µg/l,AL, NC) 5 Exceeding Criteria Exceeding Criteria with Statistical
Confidence
Clarke Creek 13-17-4 C 5.5 FW Miles
2350 From source to Rocky River
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR
Fish Community(Nar,AL, FW) 5 Exceeding Criteria Fair, Poor or Severe Bioclassification 1998
Lanes Creek 13-17-40-(1) WS-V 27.4 FW Miles
2351 From source to Marshville Water Supply Dam (located 0.1 mile downstream of Beaverdam Creek)
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR
Benthos(Nar,AL, FW) 5 Exceeding Criteria Fair, Poor or Severe Bioclassification
7/21/2021 NC 2020 303d List-Approved by EPA June 23,2021 Page 182 of 188

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Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
Table 1 . Project Information Table 2. Parameters of Concern
❑ CHECK IF HQW OR ORW WQS Name WQs Type Chronic Modifier Acute PQL Units
Facility Name Colonial Pipeline Company—2020-L1-SR2448 Par01 Arsenic Aquactic Life C 150 FW 340 ug/L
WWTP/WTP Class PC-1 Par02 Arsenic Human Health C 10 HH/WS N/A ug/L
Water Supply
NPDES Permit NCO090000 Par03 Beryllium Aquatic Life NC 6.5 FW 65 ug/L
Outfall 001 Par04 Cadmium Aquatic Life NC 0.7389 FW 4.0789 ug/L
Flow, Qw(MGD) 0.576 Par05 Chlorides Aquatic Life NC 230 FW mg/L
Receiving Stream North Prong Clark Creek ParO Chlorinated Phenolic Compounds Water Supply NC 1 A ug/L
HUC Number 30401050101 Par07 Total Phenolic Compounds Aquatic Life NC 300 A ug/L
Stream Class C Par08 Chromium III Aquatic Life NC 150.2497 FW 1123.4066 ug/L
❑ Apply WS Hardness WQC Par09 Chromium VI Aquatic Life NC 11 FW 16 pg/L
7Q10s (cfs) 0.25 Par10 Chromium, Total Aquatic Life NC N/A FW N/A pg/L
7Q10w(cfs) 0.42 Par11 Copper Aquatic Life NC 10.1641 FW 13.4275 ug/L
30Q2 (cfs) 0.56 Par12 Cyanide Aquatic Life NC 5 FW 22 10 ug/L
QA(cfs) 3.90 Par13 Fluoride Aquatic Life NC 1,800 FW ug/L
1Q10s (cfs) Par14 Lead Aquatic Life NC 4.1097 FW 101.5306 ug/L
Effluent Hardness 25 mg/L (Avg) Par15 Mercury Aquatic Life NC 12 FW 0.5 ng/L
Upstream Hardness 64.64 mg/L(Avg) Par16 Molybdenum Human Health NC 2000 HH ug/L
------------- ---------------------
Combined Hardness Chronic 33.67 mg/L Par17 Nickel Aquatic Life NC 47.8980 FW 419.0428 pg/L
------------- ---------------------
Combined Hardness Acute 32.55 mg/L Par18 Nickel Water Supply NC 25.0000 WS N/A pg/L
---------------------
Data Source(s) MW data Sep2020_Jun2022. Instream Hardness Par19 Selenium Aquatic Life NC 5 FW 56 ug/L
❑ CHECK TO APPLY MODEL data Nov2021 from SW-1. PQLs are from the Par20 Silver Aquatic Life NC 0.06 FW 0.4666 ug/L
NCDENR_DWR_WSS_LAB_PQLs Current Revision
Date - 1/22/2021 Par21 Zinc Aquatic Life NC 163.1054 FW 157.1974 ug/L
Par22
Par23
Par24
Follow directions for data entry. In some cases a Par25
comment menu list the available choices or a
dropdown menu will provide a list you may select
from. Error message occur if data entry does not
meet input criteria.
NC009000_GW DATA—FW RPA, input
8/26/2022

REASONABLE POTENTIAL ANALYSIS
H1 Use"PASTE H2 Use"PASTE
SPECIAL-Values" SPECIAL-Values"
Effluent Hardness then"COPY". Upstream Hardness then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
1 Default Value 25 25 Std Dev. N/A 21319-SW-1 11/15/2021 60.5 60.5 Std Dev. 5.5464
2 Mean 25.0000 21320-SW-1 11/16/2021 70.5 70.5 Mean 64.6400
3 C.V. 0.0000 21321-SW-1 11/17/2021 68.8 68.8 C.V. (default) 0.6000
4 n 1 21322-SW-1 11/18/2021 66 66 n 5
5 10th Per value 25.00 mg/L 21323-SW-1 11/19/2021 57.4 57.4 10th Per value 58.64 mg/L
6 Average Value 25.00 mg/L 6 Average Value 64.64 mg/L
7 Max. Value 25.00 mg/L 7 Max. Value 70.50 mg/L
8 8
9 9
10 10
11 11
12 12
13 13
14 14
15 15
16 16
17 17
18 18
19 19
20 20
21 21
22 22
23 23
24 24
25 25
26 26
27 27
28 28
29 29
30 30
31 31
32 32
33 33
34 34
35 35
36 36
37 37
38 38
39 39
40 40
41 41
42 42
43 43
44 44
45 45
46 46
47 47
48 48
49 49
50 50
51 51
52 52
53 53
54 54
55 55
56 56
57 57
58 58
NC009000_GW DATA_FW RPA, data
- 2 - 8/26/2022

REASONABLE POTENTIAL ANALYSIS
Par07 Use"PASTE Par14 Use"PASTE
SPECIAL-Values" SPECIAL-Values"
Total Phenolic Compounds then"COPY". Lead then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date BDL=1/2DL Results
1 Std Dev. NO DATA MW-65 20210107 01/07/2021 264 264 Std Dev. 42.3493
2 Mean NO DATA MW-86 20210405 4/5/2021 175 175 Mean 84.4414
3 C.V. NO DATA MW-25 20210104 01/04/2021 160 160 C.V. 0.5015
4 n 0 MW-70 20210107 01/07/2021 155 155 n 58
5 MW-79D 20220201 2/1/2022 150 150
6 Mult Factor= N/A MW-14D 20210405 4/5/2021 143 143 Mult Factor= 1.00
7 Max. Value N/A ug/L MW-25_20201201 12/01/2020 142 142 Max. Value 264.000 ug/L
8 Max. Pred Cw N/A ug/L MW-51_20210105 01/05/2021 141 141 Max. Pred Cw 264.000 ug/L
9 MW-57D (91-101) 01/12/2021 124 124
10 MW-53 20210107 01/07/2021 123 123
11 MW-69 20210106 1/6/2021 123 123
12 MW-19 20210106 01/06/2021 115 115
13 MW-66 20210107 01/07/2021 107 107
14 MW-64 20210107 01/07/2021 101 101
15 MW-86 20210504 5/4/2021 100 100
16 MW-68 20210107 01/07/2021 99.2 99.2
17 MW-25 20201023 10/23/2020 97.9 97.9
18 Dup-1-20210107 01/07/2021 94.8 94.8
19 MW-14 20210105 01/05/2021 94.7 94.7
20 MW-23R 20201020 10/20/2020 94.4 94.4
21 MW-71 20210408 4/8/2021 94.2 94.2
22 MW-23 20210106 01/06/2021 85.1 85.1
23 Walker(101-108) 01/13/2021 81.4 81.4
24 MW-16D 20220406 4/6/2022 81.3 81.3
25 MW-7 20210104 01/04/2021 78 78
26 MW-36D 20210309 3/9/2021 76.9 76.9
27 MW-62 20210105 1/5/2021 74.5 74.5
28 MW-73 20220404 4/4/2022 74.3 74.3
29 MW-27 20220202 2/2/2022 74 74
30 MW-7 20201023 10/23/2020 73.1 73.1
31 MW-36D 20210209 02/09/2021 72.1 72.1
32 MW-19 20201020 10/20/2020 71.3 71.3
33 MW-41 20210105 01/05/2021 70.9 70.9
34 MW-83 20210311 3/11/2021 67.3 67.3
35 MW-73 20220303 3/3/2022 64.9 64.9
36 MW-71 20210507 5/7/2021 64.1 64.1
37 MW-14D 20210308 3/8/2021 59.2 59.2
38 MW-28 20201202 12/02/2020 58.8 58.8
39 MW-7 20210211 02/11/2021 57.1 57.1
40 MW-73 20220201 2/1/2022 55.5 55.5
41 MW-44 20210105 01/05/2021 54.4 54.4
42 MW-21 20201201 12/01/2020 53.7 53.7
43 MW-86 20220201 2/1/2022 53.1 53.1
44 MW-60 20210105 01/05/2021 52.8 52.8
45 MW-1 20201021 10/21/2020 50.8 50.8
46 MW-01 20220203 2/3/2022 50.6 50.6
47 MW-75 20220131 1/31/2022 49.8 49.8
48 MW-40 20201201 12/01/2020 47.9 47.9
49 DU P-2 01/05/2021 47.3 47.3
50 MW-66 20220103 1/3/2022 46.9 46.9
51 MW-16D 20220504 5/4/2022 46.2 46.2
52 MW-05 20210104 01/04/2021 46 46
53 MW-84 20210505 5/5/2021 45.7 45.7
54 MW-28 20210106 01/06/2021 45 45
55 MW-01 20201130 11/30/2020 43.9 43.9
56 MW-16 20210106 01/06/2021 42.7 42.7
57 DUP-1-202204408 4/8/2022 42.1 42.1
58 MW-16D 20220603 6/3/2022 40.7 40.7
NC009000_GW DATA_FW RPA, data
- 3- 8/26/2022

Colonial Pipeline Company — 2020-L1 -SR2448 > Outfall 001
NCO090000 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators Qw = 0.576 MGD
MAXIMUM DATA POINTS = 58
Qw (MGD) = 0.5760 WWTP/WTP Class: PC-1 COMBINED HARDNESS (mg/L)
1Q10S (cfs) = 0.21 IWC% @ 1Q10S = 80.95756257 Acute = 32.55 mg/L
7Q10S (cfs) = 0.25 IWC% @ 7Q10S = 78.1239062 Chronic = 33.67 mg/L
7Q10W (cfs) = 0.42 IWC% @ 7Q10W= 68.00731261
30Q2 (cfs) = 0.56 IWC% @ 30Q2 = 61.45374449
Avg. Stream Flow, QA (cfs) = 3.90 IW%C @ QA= 18.62794191
Receiving Stream: North Prong Clark Creek HUC 30401050101 Stream Class: C
PARAMETER NC STANDARDS OR EPA CRITERIA J H REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION
TYPE Chronic Applied Standard Acute D n # Det. Max Pred Cw Allowable Cw
Acute: NO WQS
Total Phenolic Compounds NC 300 A(30Q2) ug/L 0 0 N/A ___ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___
Chronic: 488.2 No Data (new Permit, New Waste Stream)-apply
Monthly Monitoring, Pollutant of concern for petroluem
product groundwater contamination.
Acute: 125.412 RP shown-apply Monthly Monitoring with Limit.
Lead NC 4.1097 FW(7Q10s) 101.5306 ug/L 58 58 264.0 Pollutant of concern for petroluem productgroundwater contamination.
------------------- -----------------------------
Chronic: 5.261 RP shown-apply Monthly Monitoring with Limit.
Pollutant of concern for petroluem product
58 value(s) >Allowable Cw groundwater contamination.
NC009000_GW DATA_FW RPA, rpa
Page 4 of 5 8/26/2022

Date: 8/26/2022
FACILITY: Colonial Pipeline Company- 2020-L1-SR2448 Outf;
NPDES PERMIT: NCO090000 Dissolved to Total Metal Calculator
In accordance with Federal Regulations, permit limitations must be written as Total Metals per 40 CFR 122.45(c)
ReceivingReceiving Rec. Stream NPDES Total Suspended Combined Combined
9 P Instream Instream Effluent
Upstream
Stream Stream 1Q10 Flow Limit Hardness Solids Hardness Hardness Wastewater Wastewater Hardness
summer summer 7Q10 -Fixed Value- chronic Acute Concentration Concentration Avera Average
7Q10 (CFS) (MGD) [MGD] [MGD] (mg/L) (mg/L) (mg/L) (Chronic) (Acute) ge(mg/L) (mg/L)
0.2500 0.1613 0.1355 0.5760 10 33.672 32.548 78.1239 80.9576 64.64 25
Upstream Hard Avg (mg/L) = 64.64
EFF Hard Avg (mg/L) = 25
Dissolved Metals Criteria US EPA Total Metal Criteria Total Metal COMMENTS (identify parameters to PERCS Branch to maintain in facility's LTMP/STMP):
after applying hardness Translators- using =
PARAMETER equation Default Partition Dissolved Metal=Translator
Chronic Acute Coefficients Chronic Acute
[ug/1] [ug/1] (streams) [ug/1] [ug/1]
Cadmium (d) 0.19 1.03 0.252 0.74 4.08
Cd -Trout streams 0.19 0.64 0.252 0.74 2.54
Chromium III (d)(h) 30 227 0.202 150.25 1123.41
Chromium VI (d) 11 16 1.000 11.00 16.00
Chromium, Total (t) N/A N/A
Copper (d)(h) 3.5 4.7 0.348 10.16 13.43
Lead (d)(h) 0.76 19 0.184 4.11 101.53
Nickel (d)(h) 21 181 0.432 47.90 419.04
Ni - WS streams (t) 25 N/A
Silver (d)(h,acute) 0.06 0.47 1.000 0.06 0.47
Zinc (d)(h) 1 47 45 0.288 163.11 157.20
Beryllium 6.5 65 1.000 6.5 65
Arsenic (d) 150 340 1.000 150 340
(d) = dissolved metal standard. See 15A NCAC 02B .0211 for more information.
(h) =hardness-dependent dissolved metal standard. See 15A NCAC 02B .0211 for more information.
(t) =based upon measurement of total recoveable metal. See 15A NCAC 02B .0211 for more information.
The Human Health standard for Nickel in Water Supply Streams is 25 mg/L which is Total Recoverable metal standard.
The Human Health standard for Arsenic is 10 µg/L which is Total Recoverable metal standard.

NC DIVISION OF WATER RESOURCES
NPDES Implementation of Instream Dissolved Metals Criteria
The NC 2007-2014 Water Quality Standard(WQS)Triennial Review was approved by the NC
Environmental Management Committee(EMC)on November 13,2014. The US EPA subsequently
approved the WQS revisions on April 6,2016 with some exceptions.All permits public noticed by the
NC Division of Water Resources NPDES Permitting Unit after April 6,2016 shall include the
implementation of the approved 2007-2014 Triennial Review Rules for freshwater and saltwater water
quality criteria.
Table 1.NC Dissolved Metals Water uality Criteria/A uatic Life Protection
Parameter Acute FW,ug/l Chronic FW,ug/l Acute SW,ug/l Chronic SW,ug/l
(Dissolved) (Dissolved) (Dissolved) (Dissolved)
Arsenic 340 150 69 36
Beryllium 65 6.5 --- ---
Cadmium Calculation Calculation 40 8.8
Chromium III Calculation Calculation --- ---
Chromium VI 16 11 1100 50
Copper Calculation Calculation 4.8 3.1
Lead Calculation Calculation 210 8.1
Nickel Calculation Calculation 74 8.2
Silver Calculation 0.06 1.9 0.1
Zinc Calculation Calculation 90 81
Table 1 Notes:
1. FW=Freshwater, SW=Saltwater
2. Calculation=Hardness dependent criteria
3. Only the aquatic life criteria listed above are in dissolved form. Mercury and selenium criteria
have been retained as Total Metals criteria due to bioaccumulative concerns. It is still necessary
to evaluate total recoverable criteria for human health. NC has also retained the existing toxic
criteria listed in 15A NCAC 213.0200(e.g., arsenic at 10 ug/1 for human health protection),
cyanide, fluoride.
Table 2. Dissolved Freshwater Standards for Hardness-Dependent Metals
The Water Effects Ratio (WER)is equal to one unless determined otherwise under 15A
NCAC 02B .0211 Subparagraph(11)(d)
Metal NC Dissolved Standard, ug/1
Cadmium,Acute {1.136672-[ln hardness](0.041838)) e^{0.9151 [ln hardness]-3.1485}
Cadmium, Acute {1.136672-[ln hardness](0.041838)) e^{0.9151[1n hardness]-3.6236}
Trout waters
Cadmium,Chronic {1.101672-[ln hardness](0.041838)) e^{0.7998[1n hardness]-4.4451)
Chromium III,Acute 0.316 e^{0.8190[ln hardness]+3.7256}
Chromium III, 0.860 e^{0.8190[ln hardness]+0.6848}
Chronic
Copper,Acute 0.960 e^{0.9422[ln hardness]-1.700}
Copper,Chronic 0.960 e^{0.8545[ln hardness]-1.702}
Lead,Acute {1.46203-[ln hardness](0.145712)} •e^{1.273[ln hardness]-1.460}
Lead,Chronic {1.46203-[ln hardness](0.145712)} •e^{1.273[ln hardness]-4.705}
Page 1 of 4

Nickel,Acute 0.998 e^{0.8460[ln hardness]+2.255}
Nickel,Chronic 0.997 e^{0.8460[ln hardness]+0.0584}
Silver,Acute 0.85 •e All.72[ln hardness]-6.59{
Silver,Chronic Not applicable
Zinc,Acute 0.978 e^{0.8473[ln hardness]+0.8841
Zinc,Chronic 0.986 e^{0.8473[ln hardness]+0.884}
RPA Permitting Guidance/WQBELs for Hardness-Dependent Metals - Freshwater
The Reasonable Potential Analysis(RPA)is designed to calculate the allowable instream concentrations
for permit limitations. Limitations are required based upon a showing of"reasonable potential" to exceed
water quality standards. If monitoring for a particular pollutant indicates that the pollutant is not present
(i.e. consistently below detection level),then the Division may remove the monitoring requirement in the
reissued permit.
1. To perform a RPA on the Freshwater hardness-dependent metals the Permit Writer compiles the
following information:
• Critical low flow of the receiving stream, 7Q 10 (the spreadsheet automatically calculates
the 1 Q 10 using the formula 1 Q 10=0.843 (7Q 10)0.993)
• The mean annual receiving stream flow(QA), for carcinogen comparisons against HH
criteria
• The minimum average flow over 30 consecutive days that has an average recurrence of
once in two years(30Q2) in the receiving stream, for comparisons against aesthetic
standards
• effluent hardness and upstream hardness, site-specific data is preferred
• Permitted flow
• Receiving stream classification
2. The chronic Aquatic Life water quality criteria is converted from total recoverable metal at lab
conditions to dissolved lab conditions for the following metals: cadmium, copper, lead,nickel,
zinc, and trivalent chromium. EPA default partition coefficients,or site-specific translators
developed using federally approved methodology, are used in the RPA spreadsheet to convert the
dissolved lab conditions to a total recoverable metal at ambient conditions.
3. The acute Aquatic Life water quality criteria is converted from total recoverable metal at lab
conditions to dissolved lab conditions for the following metals: cadmium, copper, lead,nickel,
zinc, silver and trivalent chromium. EPA default partition coefficients, or site-specific translators
developed using federally approved methodology, are used in the RPA spreadsheet to convert the
dissolved lab conditions to a total recoverable metal at ambient conditions.
4. For criteria that are hardness dependent, site-specific hardness data(effluent and upstream)is best
to evaluate chronic and acute concentrations. The permit writer will first review DMR's,Effluent
Pollutant Scans, and Toxicity Test results for any hardness data and then contact the Permittee to
see if any additional data is available for instream hardness values,upstream of the discharge.
If no hardness data is available,the permit writer may choose to do an initial evaluation using a
default hardness of 25 mg/L and total suspended solids(TSS)of 10 mg/L to see if the permittee is
impacted. Minimum and maximum limits on the hardness value used for water quality
calculations are 25 mg/L and 400 mg/L respectively. The minimum TSS value used for EPA
partition coefficients is 10 mg/L.
Page 2 of 4

If the use of a default hardness value results in a hardness-dependent metal showing reasonable
potential to violate water quality criteria the permit writer should contact the Permittee and
request 5 site-specific effluent and upstream hardness samples.
The overall hardness value used in the water quality calculations is calculated as follows:
Combined Hardness (chronic)
_(Permitted Flow*Avg. Effluent Hardness)x(7Q10 S*Avg_Upstream Hardness)
(Permitted flow+7Q 10 S)
The Combined Hardness for acute is the same but the calculation uses the IQ 10 flow.
5. EPA default partition coefficients or the"Fraction Dissolved"converts the value for dissolved
metal at laboratory conditions to total recoverable metal at in-stream ambient conditions. This
factor is calculated using the linear partition coefficients found in The Metals Translator:
Guidance for Calculating a Total Recoverable Permit Limit from a Dissolved Criterion (EPA
823-B-96-007,June 1996) and the equation:
Cdiss - 1
Ctotal 1 + { [Kp.] [ss('+a)] [10-6] }
Where: ss=in-stream suspended solids concentration [mg/1],minimum of 10 mg/L used
Kpo and a=constants that express the equilibrium relationship between dissolved and
adsorbed forms of metals. A list of constants used for each hardness-dependent metal can
also be found in the RPA program under a sheet labeled DPCs.
6. The dissolved hardness-dependent metals calculations are divided by the default partition
coefficients(or translators)to obtain a Total Recoverable Metal at ambient conditions. Dissolved
metals that do not have translators or default partition coefficients are divided by one. All other
standards (HH,WS,non-hardness dependent metals)are automatically shown in Table 2 of the
RPA spreadsheet when the program is initiated.
7. The standards,criteria, and calculated Total Recoverable metals listed in Table 2 of the RPA
spreadsheet are inserted into a mass balance equation to determine the total allowable
concentration(permit limits) for each pollutant using the following equation:
Ca=(s7Q10+Qw) (Cwgs)-s7Q10) (Cb)
Qw
Where: Ca=allowable effluent concentration(µg/L or mg/L)
Cwqs=NC Water Quality Standard or federal criteria
Cb=background concentration(assume zero for all toxicants except NH3)*
Qw=permitted effluent flow
S7Q 10=summer low flow used to protect aquatic life from chronic toxicity and human
health through the consumption of water, fish,and shellfish from noncarcinogens
* Discussions are on-going with EPA on how best to address background concentrations
Flows other than S7Q10 may be incorporated as applicable:
1 Q 10=used in the equation to protect aquatic life from acute toxicity
QA=used in the equation to protect human health through the consumption of water, fish,
and shellfish from carcinogens
30Q2=used in the equation to protect aesthetic quality
The total allowable concentration(permit limits)are shown on the"RPA Sheet"in the RPA
spreadsheet.
Page 3 of 4

8. Effluent toxicant data is entered into the"Data Sheet."of the RPA spreadsheet which uses
statistics to estimate the 95th percentile concentration of each pollutant. These concentrations are
listed as the Predicted max concentrations on the"RPA Sheet"in the RPA spreadsheet. The
Predicted Max concentrations are compared to the Total allowable acute and chronic
concentrations to determine if a permit limit is necessary. This is in accordance with the U.S.
EPA Technical Support Document for Water Quality-Based Toxics Control published in 1991.
9. Effluent hardness sampling and instream hardness sampling,upstream of the discharge, is being
inserted into all permits with facilities monitoring for hardness-dependent metals to build a more
robust hardness dataset.
10. Hardness and flow values used in the Reasonable Potential Analysis for this permit included:
Parameter Value Comments
Effluent Hardness(mg/L) 25 mg/L Default value
[Total as,CaCO3 or(Ca+Mg)]
Upstream Hardness(mg/L) 64.64 mg/L Instream Hardness data Nov2021
[Total as,CaCO3 or(Ca+Mg)] from SW-1.
7Q10 summer(cfs) 0.25 USGS J. Curtis Weaver,June 15,
2021.
1 Q 10 (cfs) 0.21 RPA calculation
Permitted Flow(MGD) 0.576 MGD Permit application
11. The Total Chromium NC WQS was removed and replaced with trivalent chromium and
hexavalent chromium WQC. Effluent sampling data on Total Chromium is used as a surrogate
parameter to assess if limitations and/or sampling are required for trivalent or hexavalent
chromium.
Date: 08/25/2022
Permit Writer: Derek Denard
Page 4 of 4

2018 Generic RPA - 95% Probability/95% Confidence
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY MISSING DATA or ENTRY ERROR
Table 1. Project Information Table 2. Parameters of Concern
❑ CHECK IF HQW OR ORW Name Type Chronic Modifier Acute PQL Units
Facility Name Colonial Pipeline Company—2020-L1-SR2448 Par01 Benzene C 51 HH 1 pg/L
WWTP/WTP Class PC-1 Par02 Bromobenzene 1 pg/L ?DATA?
NPDES Permit NCO090000 Par03 Bromochloromethane 1 pg/L ?DATA?
Outfall 001 Par04 Bromodichloromethane(Dichlorobromomethane) C 17 HH 1 pg/L
Flow, Qw (MGD) 0.576 Par05 Bromoform C 120 HH 2 pg/L
Receiving Stream North Prong Clark Creek Par06 Bromomethane (Methyl Bromide) NC 0.04 FW 2 pg/L
Stream Class C Par07 n-Butylbenzene NC 3.9 FW 1 pg/L
HUC Number 30401050101 Par08 sec-Butyl benzene 1 pg/L ?DATA?
7Q10s (cfs) 0.25 Par09 tert-Butyl benzene 1 pg/L ?DATA?
7Q10w (cfs) 0.42 Par10 Carbon tetrachloride C 1.6 HH 1 pg/L
30Q2 (cfs) 0.56 Par11 Chlorobenzene NC 140 FW 1 pg/L
QA(cfs) 3.90 Par12 Chloroethane 2 pg/L ?DATA?
1Q10s (cfs) 0.21 Par13 Chloroform (Tricholomethane) NC 2000 HH 1 pg/L
Data Source(s) MW data Sep202O_Jun2O22. PQLs are from the Par14 Chloromethane (Methyl Chloride) NC 96 HH 2 pg/L
❑ CHECK TO APPLY MODEL NCDENR_DWR_WSS_LAB_PQLs Current
FCHECK TO APPLY MODEL Par15 2-Chlorotoluene 1 pg/L ?DATA?
Revision Date - 1/22/2021.
Par16 4-Chlorotoluene 1 pg/L ?DATA?
Par17 1,2-Dibromo-3-chloropropane(Nemagon) C 0.13 HH 2 pg/L
Par18 Dibromochloromethane(Chlorodibromomethane) C 21 HH 2 pg/L
Par19 1,2-Dibromoethane (EDB) C 0.1 HH 1 pg/L
Follow directions for data entry. In some cases a Par20 Dibromomethane 1 pg/L ?DATA?
comment menu list the available choices or a Par21 1,2-Dichlorobenzene NC 470 FW 1 pg/L
dropdown menu will provide a list you may select Par22 1,3-Dichlorobenzene NC 10 HH 1 pg/L
from. Error message occur if data entry does not
meet input criteria.
NC009000_GW DATA—GENERIC RPA_Part 1, input
9/11/2022

REASONABLE POTENTIAL ANALYSIS
1 2
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
Benzene Maximum data points Bromobenzene Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220601 6/1/2022 9240 9240 Std Dev. 2486.0760 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357
MW-52 20220506 5/6/2022 8920 8920 Mean 3263.1724 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336
MW-19 20220406 4/6/2022 8540 8540 C.V. 0.7619 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670
DUP-1-202204408 4/8/2022 7890 7890 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-48 20220408 4/8/2022 7860 7860 MW-19 20220301 3/1/2022 < 50 25
MW-48 20220506 5/6/2022 7860 7860 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-48_20220603 6/3/2022 7320 7320 Max. Value 9240.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20220504 5/4/2022 6840 6840 Max. Pred Cw 9240.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20220201 2/1/2022 6580 6580 MW-19 20211102 11/2/2021 < 25 12.5
MW-19 20220301 3/1/2022 6260 6260 DUP-2-20211102 11/2/2021 < 25 12.5
MW-52 20220407 4/7/2022 5920 5920 MW-19_20211201 12/1/2021 < 25 12.5
MW-19 20211201 12/1/2021 5280 5280 MW-48_20220408 4/8/2022 < 25 12.5
MW-19 20210831 8/31/2021 5270 5270 DUP-1-202204408 4/8/2022 < 25 12.5
MW-19 20220105 1/5/2022 4950 4950 MW-48 20220506 5/6/2022 < 25 12.5
MW-50 20210106 1/6/2021 4670 4670 MW-48 20220603 6/3/2022 < 25 12.5
MW-19 20210405 4/5/2021 4560 4560 MW-50 20210106 1/6/2021 < 25 12.5
DUP-2-20211102 11/2/2021 4440 4440 MW-52 20220407 4/7/2022 < 25 12.5
MW-19 20210504 5/4/2021 4330 4330 MW-52 20220506 5/6/2022 < 25 12.5
MW-19 20210707 7/7/2021 4280 4280 MW-11 20201020 10/20/2020 < 20 10
MW-19 20211102 11/2/2021 4220 4220 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 4090 4090 MW-19 20210803 8/3/2021 < 20 10
MW-50 20201202 12/02/2020 3730 3730 MW-19 20211001 10/1/2021 < 20 10
MW-19 20210602 6/2/2021 3400 3400 MW-19 20220105 1/5/2022 < 20 10
MW-19 20211001 10/1/2021 2500 2500 MW-29 20210805 8/5/2021 < 20 10
MW-52 20220303 3/3/2022 2410 2410 MW-29 20210902 9/2/2021 < 20 10
MW-29 20210902 9/2/2021 2380 2380 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210805 8/5/2021 2360 2360 MW-29 20210709 7/9/2021 < 12.5 6.25
MW-38 20210902 9/2/2021 2270 2270 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-19 20210308 3/8/2021 2140 2140 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 2000 2000 MW-50 20220531 5/31/2022 < 12.5 6.25
DUP-2-20210709 7/9/2021 1950 1950 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-38 20210804 8/4/2021 1920 1920 MW-52 20210929 9/29/2021 < 12 6
MW-40 20210106 01/06/2021 1870 1870 MW-19 20210308 3/8/2021 < 10 5
MW-52 20211203 12/3/2021 1850 1850 MW-29 20210603 6/3/2021 < 10 5
MW-21 20210603 6/3/2021 1780 1780 MW-50 20201202 12/02/2020 < 10 5
MW-11 20201020 10/20/2020 1740 1740 MW-52 20220303 3/3/2022 < 10 5
MW-38 20210707 7/7/2021 1630 1630 MW-21 20210603 6/3/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 1630 1630 MW-21 20210707 7/7/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 1490 1490 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-21 20210308 3/8/2021 1470 1470 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-50 20220531 5/31/2022 1400 1400 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 1370 1370 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-38 20210603 6/3/2021 1320 1320 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-50 20210503 5/3/2021 1250 1250 MW-21 20210210 2/10/2021 < 5 2.5
MW-29 20210603 6/3/2021 1170 1170 MW-21 20210308 3/8/2021 < 5 2.5
MW-52 20220203 2/3/2022 1170 1170 MW-21 20211001 10/1/2021 < 5 2.5
MW-52 20210929 9/29/2021 1100 1100 MW-25 20220105 1/5/2022 < 5 2.5
MW-52 20210902 9/2/2021 1080 1080 MW-29 20210507 5/7/2021 < 5 2.5
MW-52 20211105 11/5/2021 1050 1050 MW-38 20210506 5/6/2021 < 5 2.5
MW-21 20210210 2/10/2021 1030 1030 MW-38 20210603 6/3/2021 < 5 2.5
MW-50 20210212 2/12/2021 996 996 MW-38 20210707 7/7/2021 < 5 2.5
MW-54 20210805 8/5/2021 984 984 MW-38 20210804 8/4/2021 < 5 2.5
MW-38 20210506 5/6/2021 978 978 MW-39 20200916 09/16/2020 < 5 2.5
MW-39 20200916 09/16/2020 966 966 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20220131 1/31/2022 901 901 MW-50 20210503 5/3/2021 < 5 2.5
MW-55 20201023 10/23/2020 900 900 MW-50 20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 883 883 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220502 5/2/2022 876 876 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 1, data
-2 - 9/11/2022

REASONABLE POTENTIAL ANALYSIS
3 4
Use"PASTE SPECIAL Use"PASTE SPECIAL
Bromochloromethane Values"then"COPY". Bromodichloromethane (Dichlorobromome values"then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-66 20210830 8/30/2021 1.1 1.1 Std Dev. 8.7560 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.4488
MW-19 20220406 4/6/2022 < 100 50 Mean 9.0095 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.4767
MW-19 20220601 6/1/2022 < 62.5 31.25 C.V. 0.9719 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.8915
MW-19 20210831 8/31/2021 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220201 2/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220301 3/1/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20220504 5/4/2022 < 50 25 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210405 4/5/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20210504 5/4/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
MW-19 20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 MW-19 20211201 12/1/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-11 20201020 10/20/2020 < 20 10
MW-11 20201020 10/20/2020 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-29_20210902 9/2/2021 < 20 10 Walker (101-108) 01/13/2021 7.5 7.5
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-23 20200920 09/20/2020 6.1 6.1
MW-19 20210308 3/8/2021 < 10 5 MW-52 20210929 9/29/2021 < 12 6
MW-29 20210603 6/3/2021 < 10 5 MW-61 20201203 12/03/2020 5.5 5.5
MW-50 20201202 12/02/2020 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-29 20210603 6/3/2021 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-50 20201202 12/02/2020 < 10 5
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-52 20220303 3/3/2022 < 10 5
DUP-1-20210707 7/7/2021 < 6.2 3.1 MW-62 20201203 12/3/2020 4.8 4.8
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-60 20201007 10/07/2020 4.1 4.1
MW-41_20220505 5/5/2022 < 6.2 3.1 MW-69 20210604 6/4/2021 3.9 3.9
MW-50_20201020 10/20/2020 < 6.2 3.1 Dup-9 01/13/2021 3.9 3.9
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-51 20200922 09/22/2020 3.8 3.8
MW-21_20210210 2/10/2021 < 5 2.5 Walker (48-55) 01/13/2021 3.8 3.8
MW-21 20210308 3/8/2021 < 5 2.5 MW-62 20210105 1/5/2021 3.7 3.7
MW-21 20211001 10/1/2021 < 5 2.5 MW-69 20210507 5/7/2021 3.4 3.4
MW-25 20220105 1/5/2022 < 5 2.5 MW-19 20200916 09/16/2020 3.3 3.3
MW-29 20210507 5/7/2021 < 5 2.5 MW-61 D_20210210 2/10/2021 3.3 3.3
MW-38 20210506 5/6/2021 < 5 2.5 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-38 20210603 6/3/2021 < 5 2.5 MW-21 20210707 7/7/2021 < 6.2 3.1
MW-38 20210707 7/7/2021 < 5 2.5 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-39 20200916 09/16/2020 < 5 2.5 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-50 20210503 5/3/2021 < 5 2.5 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-50 20211130 11/30/2021 < 5 2.5 MW-61 D_20210310 3/10/2021 3.1 3.1
DUP-2-20211130 11/30/2021 < 5 2.5 M W-54 20201006 10/06/2020 3 3
NC009000 GW DATA GENERIC RPA Part 1, data
- 3 - 9/11/2022

REASONABLE POTENTIAL ANALYSIS
5 6
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY".
Bromoform Bromomethane (Methyl Bromide) Values"then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.8258 MW-16D 20220406 4/6/2022 3.5 3.5 Std Dev. 87.9933
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.2491 MW-19 20220406 4/6/2022 < 1000 500 Mean 89.3922
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9542 MW-19 20220601 6/1/2022 < 625 312.5 C.V. 0.9844
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20210831 8/31/2021 < 500 250 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220201 2/1/2022 < 500 250
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220301 3/1/2022 < 500 250 Mult Factor= 1.0000
MW-19_20211001 10/1/2021 < 40 20 Max. Value 50.0 Ng/L MW-19_20220504 5/4/2022 < 500 250 Max. Value 500.0 pg/L
MW-19_20210405 4/5/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210405 4/5/2021 < 250 125 Max. Pred Cw 500.0 pg/L
MW-19 20210504 5/4/2021 < 25 12.5 MW-19 20210504 5/4/2021 < 250 125
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 250 125
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 250 125
MW-19 20211201 12/1/2021 < 25 12.5 MW-19 20211201 12/1/2021 < 250 125
MW-48 20220408 4/8/2022 < 25 12.5 MW-48 20220408 4/8/2022 < 250 125
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 250 125
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 250 125
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 250 125
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 250 125
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 250 125
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 250 125
MW-11 20201020 10/20/2020 < 20 10 MW-11 20201020 10/20/2020 < 200 100
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 200 100
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 200 100
MW-19 20220105 1/5/2022 < 20 10 MW-19 20211001 10/1/2021 < 200 100
MW-29 20210805 8/5/2021 < 20 10 MW-19 20220105 1/5/2022 < 200 100
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210805 8/5/2021 < 200 100
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-29 20210902 9/2/2021 < 200 100
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 125 62.5
DUP-2-20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 125 62.5
MW-40 20210106 01/06/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 125 62.5
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-40_20210106 01/06/2021 < 125 62.5
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-50_20220531 5/31/2022 < 125 62.5
MW-52 20210929 9/29/2021 < 12 6 MW-55_20201023 10/23/2020 < 125 62.5
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 100 50
MW-21 20211001 10/1/2021 < 10 5 MW-29 20210603 6/3/2021 < 100 50
MW-29 20210603 6/3/2021 < 10 5 MW-50 20201202 12/02/2020 < 100 50
MW-50 20201202 12/02/2020 < 10 5 MW-52 20220303 3/3/2022 < 100 50
MW-52 20220303 3/3/2022 < 10 5 MW-21 20210603 6/3/2021 < 62.5 31.25
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 62.5 31.25
MW-21 20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 62.5 31.25
DUP-1-20210707 7/7/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 62.5 31.25
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-41 20220505 5/5/2022 < 62.5 31.25
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-50 20201020 10/20/2020 < 62.5 31.25
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-55 20220603 6/3/2022 < 62.5 31.25
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-21 20210210 2/10/2021 < 50 25
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 50 25
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 50 25
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 50 25
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 50 25
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 50 25
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 50 25
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 50 25
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 50 25
MW-39 20200916 09/16/2020 < 5 2.5 MW-39 20200916 09/16/2020 < 50 25
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 50 25
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 50 25
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 50 25
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 50 25
MW-50 20220103 1/3/2022 < 5 2.5 MW-50 20220103 1/3/2022 < 50 25
NC009000_GW DATA-GENERIC RPA_Part 1, data
-4 - 9/11/2022

REASONABLE POTENTIAL ANALYSIS
7 8
Use"PASTE SPECIAL Use"PASTE SPECIAL
n-Butylbenzene Values"then"COPY". sec-Butyl benzene Values"then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 9.1948 MW-07_20210928 9/28/2021 0.14 0.5 Std Dev. 8.7957
MW-55 20220603 6/3/2022 37 37 Mean 10.0698 MW-25_20210929 9/29/2021 0.12 0.5 Mean 8.9647
MW-19 20220601 6/1/2022 < 62.5 31.25 C.V. 0.9131 MW-19_20220406 4/6/2022 < 100 50 C.V. 0.9812
MW-19 20220504 5/4/2022 < 50 25 n 58 MW-19_20220601 6/1/2022 < 62.5 31.25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19_20210831 8/31/2021 < 50 25
MW-19 20220201 2/1/2022 < 50 25 Mult Factor= 1.0000 MW-19_20220201 2/1/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210831 8/31/2021 < 50 25 Max. Value 50.0 pg/L MW-19_20220301 3/1/2022 < 50 25 Max. Value 50.0 pg/L
MW-52_20220506 5/6/2022 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20220504 5/4/2022 < 50 25 Max. Pred Cw 50.0 pg/L
MW-52 20220407 4/7/2022 < 25 12.5 MW-19_20210405 4/5/2021 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-19_20210504 5/4/2021 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-19_20211102 11/2/2021 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
MW-19 20211102 11/2/2021 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-19 20210504 5/4/2021 < 25 12.5 MW-48_20220506 5/6/2022 < 25 12.5
MW-19 20210405 4/5/2021 < 25 12.5 MW-48_20220603 6/3/2022 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-29 20210902 9/2/2021 < 20 10 MW-52_20220506 5/6/2022 < 25 12.5
MW-29 20210805 8/5/2021 < 20 10 MW-11_20201020 10/20/2020 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19_20210707 7/7/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19_20210803 8/3/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19_20211001 10/1/2021 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19_20220105 1/5/2022 < 20 10
MW-1 120201020 10/20/2020 < 20 10 MW-29_20210805 8/5/2021 < 20 10
MW-61 20220506 5/6/2022 8.9 8.9 MW-29_20210902 9/2/2021 < 20 10
MW-61 20220603 6/3/2022 8.6 8.6 MW-19_20210602 6/2/2021 < 12.5 6.25
Dup-9 01/13/2021 6.6 6.6 MW-29_20210709 7/9/2021 < 12.5 6.25
DUP-2-20220603 6/3/2022 6.6 6.6 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-40_20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50_20220531 5/31/2022 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-55_20201023 10/23/2020 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-52_20210929 9/29/2021 < 12 6
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19_20210308 3/8/2021 < 10 5
DUP-2-20210709 7/9/2021 < 12.5 6.25 MW-29 20210603 6/3/2021 < 10 5
MW-52 20210929 9/29/2021 < 12 6 MW-50_20201202 12/02/2020 < 10 5
Walker(48-55) 01/13/2021 5.4 5.4 MW-52_20220303 3/3/2022 < 10 5
MW-25R 20220603 6/3/2022 5.1 5.1 MW-21_20210603 6/3/2021 < 6.2 3.1
MW-52 20220303 3/3/2022 < 10 5 MW-21_20210707 7/7/2021 < 6.2 3.1
MW-50 20201202 12/02/2020 < 10 5 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-29 20210603 6/3/2021 < 10 5 MW-38_20210902 9/2/2021 < 6.2 3.1
MW-19 20210308 3/8/2021 < 10 5 MW-41_20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50_20201020 10/20/2020 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-55_20220603 6/3/2022 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-21_20210210 2/10/2021 < 5 2.5
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21_20210308 3/8/2021 < 5 2.5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21_20211001 10/1/2021 < 5 2.5
DUP-1-20210707 7/7/2021 < 6.2 3.1 MW-25 20220105 1/5/2022 < 5 2.5
MW-54 20210805 8/5/2021 < 5 2.5 MW-29_20210507 5/7/2021 < 5 2.5
MW-54 20210604 6/4/2021 < 5 2.5 MW-38_20210506 5/6/2021 < 5 2.5
MW-52 20220203 2/3/2022 < 5 2.5 MW-38_20210603 6/3/2021 < 5 2.5
MW-52 20211203 12/3/2021 < 5 2.5 MW-38_20210707 7/7/2021 < 5 2.5
MW-52 20211105 11/5/2021 < 5 2.5 MW-38_20210804 8/4/2021 < 5 2.5
MW-52 20210902 9/2/2021 < 5 2.5 MW-39_20200916 09/16/2020 < 5 2.5
MW-50 20220502 5/2/2022 < 5 2.5 MW-50_20210212 2/12/2021 < 5 2.5
MW-50 20220404 4/4/2022 < 5 2.5 MW-50_20210503 5/3/2021 < 5 2.5
MW-50 20220228 2/28/2022 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 1, data
- 5- 9/11/2022

REASONABLE POTENTIAL ANALYSIS
9 10
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
tent-Butyl benzene Maximum data points Carbon tetrachloride Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.8750 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.88
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 8.7216 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 8.72
MW-19 20210831 8/31/2021 < 50 25 C.V. 1.0176 MW-19 20210831 8/31/2021 < 50 25 C.V. 1.0176
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.00 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-19 20211201 12/1/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48 20220408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50_20220531 5/31/2022 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-52_20210929 9/29/2021 < 12 6
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-29_20210603 6/3/2021 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-52_20220303 3/3/2022 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21_20210603 6/3/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21_20210707 7/7/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 MW-50 20220103 1/3/2022 < 5 2.5
MW-50 20220131 1/31/2022 < 5 2.5 MW-50 20220131 1/31/2022 < 5 2.5
MW-50 20220228 2/28/2022 < 5 2.5 MW-50 20220228 2/28/2022 < 5 2.5
MW-50 20220404 4/4/2022 < 5 2.5 MW-50 20220404 4/4/2022 < 5 2.5
MW-50 20220502 5/2/2022 < 5 2.5 MW-50 20220502 5/2/2022 < 5 2.5
MW-52 20210902 9/2/2021 < 5 2.5 MW-52 20210902 9/2/2021 < 5 2.5
MW-52 20211105 11/5/2021 < 5 2.5 1 MW-52 20211105 11/5/2021 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 1, data
- 6 - 9/11/2022

REASONABLE POTENTIAL ANALYSIS
11 12
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
Chlorobenzene Maximum data points Chloroethane Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 DUP-1 01/04/2021 1.1 1 Std Dev. 17.6677
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-70 20210706 7/6/2021 0.46 1 Mean 17.6595
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20220406 4/6/2022 < 200 100 C.V. 1.0005
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220601 6/1/2022 < 125 62.5 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20210831 8/31/2021 < 100 50
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220201 2/1/2022 < 100 50 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 Ng/L MW-19_20220301 3/1/2022 < 100 50 Max. Value 100.0 Ng/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20220504 5/4/2022 < 100 50 Max. Pred Cw 100.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20210405 4/5/2021 < 50 25
DUP-2-20211102 11/2/2021 < 25 12.5 MW-19 20210504 5/4/2021 < 50 25
MW-19 20211201 12/1/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 50 25
MW-48 20220408 4/8/2022 < 25 12.5 DUP-2-20211102 11/2/2021 < 50 25
DUP-1-202204408 4/8/2022 < 25 12.5 MW-19 20211201 12/1/2021 < 50 25
MW-48 20220506 5/6/2022 < 25 12.5 MW-48_20220408 4/8/2022 < 50 25
MW-48 20220603 6/3/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 50 25
MW-50 20210106 1/6/2021 < 25 12.5 MW-48 20220506 5/6/2022 < 50 25
MW-52 20220407 4/7/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 50 25
MW-52 20220506 5/6/2022 < 25 12.5 MW-50 20210106 1/6/2021 < 50 25
MW-11 20201020 10/20/2020 < 20 10 MW-52 20220407 4/7/2022 < 50 25
MW-19 20210707 7/7/2021 < 20 10 MW-52 20220506 5/6/2022 < 50 25
MW-19 20210803 8/3/2021 < 20 10 MW-11 20201020 10/20/2020 < 40 20
MW-19 20211001 10/1/2021 < 20 10 MW-19 20210707 7/7/2021 < 40 20
MW-19 20220105 1/5/2022 < 20 10 MW-19 20210803 8/3/2021 < 40 20
MW-29 20210805 8/5/2021 < 20 10 MW-19 20220105 1/5/2022 < 40 20
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210805 8/5/2021 < 40 20
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-29 20210902 9/2/2021 < 40 20
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 25 12.5
DUP-2-20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 25 12.5
MW-40 20210106 01/06/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 25 12.5
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-40 20210106 01/06/2021 < 25 12.5
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-50 20220531 5/31/2022 < 25 12.5
MW-52 20210929 9/29/2021 < 12 6 MW-55 20201023 10/23/2020 < 25 12.5
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 20 10
MW-29 20210603 6/3/2021 < 10 5 MW-19 20211001 10/1/2021 < 20 10
MW-50 20201202 12/02/2020 < 10 5 MW-29 20210603 6/3/2021 < 20 10
MW-52 20220303 3/3/2022 < 10 5 MW-50 20201202 12/02/2020 < 20 10
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-52 20220303 3/3/2022 < 20 10
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 12.5 6.25
DUP-1-20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 12.5 6.25
MW-38 20210902 9/2/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 12.5 6.25
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-38 20210902 9/2/2021 < 12.5 6.25
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-41 20220505 5/5/2022 < 12.5 6.25
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-50 20201020 10/20/2020 < 12.5 6.25
MW-21 20210210 2/10/2021 < 5 2.5 MW-55 20220603 6/3/2022 < 12.5 6.25
MW-21 20210308 3/8/2021 < 5 2.5 MW-52 20210929 9/29/2021 < 12 6
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 10 5
MW-25 20220105 1/5/2022 < 5 2.5 MW-21 20210308 3/8/2021 < 10 5
MW-29 20210507 5/7/2021 < 5 2.5 MW-25 20220105 1/5/2022 < 10 5
MW-38 20210506 5/6/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 10 5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 10 5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 10 5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 10 5
MW-39 20200916 09/16/2020 < 5 2.5 MW-38 20210804 8/4/2021 < 10 5
MW-50 20210212 2/12/2021 < 5 2.5 MW-39 20200916 09/16/2020 < 10 5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 10 5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 10 5
DUP-2-20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 10 5
MW-50 20220103 1/3/2022 < 5 2.5 1 DUP-2-20211130 11/30/2021 < 10 5
NC009000_GW DATA-GENERIC RPA_Part 1, data
- 7 - 9/11/2022

REASONABLE POTENTIAL ANALYSIS
13 14
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
Chloroform (Tricholomethane) Maximum data points Chloromethane (Methyl Chloride) Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
Walker (101-108) 01/13/2021 403 403 Std Dev. 51.8633 MW-50_20211130 11/30/2021 10 10 Std Dev. 17.5760
Walker (48-55) 01/13/2021 81.3 81.3 Mean 27.8750 DUP-2-20211130 11/30/2021 9.6 9.6 Mean 18.0647
Dup-9 01/13/2021 78.7 78.7 C.V. 1.8606 Walker (101-108) 01/13/2021 4.9 4.9 C.V. 0.9729
MW-19 20220406 4/6/2022 < 100 50 n 58 MW-25_20211201 12/1/2021 1.8 1 n 58
MW-23_20200920 09/20/2020 36.9 36.9 Walker (48-55) 01/13/2021 1.1 1
MW-19 20220601 6/1/2022 < 62.5 31.25 Mult Factor= 1.0000 MW-19_20220406 4/6/2022 < 200 100 Mult Factor= 1.0000
MW-61_20201203 12/03/2020 31 31 Max. Value 403.0 pg/L MW-19_20220601 6/1/2022 < 125 62.5 Max. Value 100.0 pg/L
MW-19_20200916 09/16/2020 30.8 30.8 Max. Pred Cw 403.0 pg/L MW-19_20210831 8/31/2021 < 100 50 Max. Pred Cw 100.0 pg/L
MW-54 20201006 10/06/2020 28.2 28.2 MW-19 20220201 2/1/2022 < 100 50
MW-46 20200915 09/15/2020 26.2 26.2 MW-19 20220301 3/1/2022 < 100 50
MW-51 20200922 09/22/2020 26.1 26.1 MW-19 20220504 5/4/2022 < 100 50
MW-19 20210831 8/31/2021 < 50 25 MW-19 20210405 4/5/2021 < 50 25
MW-19 20220201 2/1/2022 < 50 25 MW-19 20210504 5/4/2021 < 50 25
MW-19 20220301 3/1/2022 < 50 25 MW-19 20211102 11/2/2021 < 50 25
MW-19 20220504 5/4/2022 < 50 25 DUP-2-20211102 11/2/2021 < 50 25
MW-19 20201007 10/07/2020 24.5 24.5 MW-19 20211201 12/1/2021 < 50 25
MW-42 20201007 09/13/2020 23.9 23.9 MW-48 20220408 4/8/2022 < 50 25
MW-42 20200915 09/15/2020 23.8 23.8 DUP-1-202204408 4/8/2022 < 50 25
MW-53 20201006 10/06/2020 22.9 22.9 MW-48 20220506 5/6/2022 < 50 25
MW-62 20201203 12/3/2020 22.2 22.2 MW-48 20220603 6/3/2022 < 50 25
MW-13 20200915 09/15/2020 21.7 21.7 MW-50 20210106 1/6/2021 < 50 25
MW-69 20210604 6/4/2021 20.2 20.2 MW-52 20210929 9/29/2021 < 50 25
MW-45 20200915 09/15/2020 20 20 MW-52 20220407 4/7/2022 < 50 25
MW-51 20201007 10/07/2020 19.3 19.3 MW-52 20220506 5/6/2022 < 50 25
Dup-1-20201007 10/07/2020 19.2 19.2 MW-11_20201020 10/20/2020 < 40 20
MW-69 20210507 5/7/2021 18.7 18.7 MW-19 20210707 7/7/2021 < 40 20
MW-44 20200915 09/15/2020 18.5 18.5 MW-19 20210803 8/3/2021 < 40 20
MW-11 20200903 09/03/2020 18.3 18.3 MW-19 20220105 1/5/2022 < 40 20
MW-46 20201020 10/20/2020 17.6 17.6 MW-29 20210805 8/5/2021 < 40 20
MW-62 20210105 1/5/2021 16.8 16.8 MW-29 20210902 9/2/2021 < 40 20
MW-47 20200915 09/15/2020 16.5 16.5 MW-19 20210602 6/2/2021 < 25 12.5
MW-17 20200916 09/16/2020 16.2 16.2 MW-29 20210709 7/9/2021 < 25 12.5
MW-45 20201007 10/07/2020 15.8 15.8 DUP-2-20210709 7/9/2021 < 25 12.5
MW-58 20201007 10/07/2020 15.6 15.6 MW-40 20210106 01/06/2021 < 25 12.5
MW-8 20200903 09/03/2020 15.5 15.5 MW-50 20220531 5/31/2022 < 25 12.5
MW-42 20201020 10/20/2020 15.5 15.5 MW-55 20201023 10/23/2020 < 25 12.5
MW-69 20210804 8/4/2021 15.4 15.4 MW-19 20210308 3/8/2021 < 20 10
MW-60 20201007 10/07/2020 15.2 15.2 MW-29 20210603 6/3/2021 < 20 10
MW-13 20201007 10/07/2020 15.1 15.1 MW-50 20201202 12/02/2020 < 20 10
MW-69 20210708 7/8/2021 14.7 14.7 MW-52 20220303 3/3/2022 < 20 10
MW-69 20210929 9/29/2021 14 14 MW-21 20210603 6/3/2021 < 12.5 6.25
MW-39 20200916 09/16/2020 13.9 13.9 MW-21 20210707 7/7/2021 < 12.5 6.25
MW-51 20201021 10/21/2020 13.4 13.4 DUP-1-20210707 7/7/2021 < 12.5 6.25
DUP-1-20201021 10/21/2020 13 13 MW-38 20210902 9/2/2021 < 12.5 6.25
MW-61 D_20210210 2/10/2021 12.9 12.9 MW-41 20220505 5/5/2022 < 12.5 6.25
MW-08 20200913 09/13/2020 12.8 12.8 MW-50 20201020 10/20/2020 < 12.5 6.25
MW-61 D_20210507 5/7/2021 12.7 12.7 MW-55 20220603 6/3/2022 < 12.5 6.25
MW-19 20210405 4/5/2021 < 25 12.5 MW-21 20210210 2/10/2021 < 10 5
MW-19 20210504 5/4/2021 < 25 12.5 MW-21 20210308 3/8/2021 < 10 5
MW-19 20211102 11/2/2021 < 25 12.5 MW-25 20220105 1/5/2022 < 10 5
DUP-2-20211102 11/2/2021 < 25 12.5 MW-29 20210507 5/7/2021 < 10 5
MW-19 20211201 12/1/2021 < 25 12.5 MW-38 20210506 5/6/2021 < 10 5
MW-48 20220408 4/8/2022 < 25 12.5 MW-38 20210603 6/3/2021 < 10 5
DUP-1-202204408 4/8/2022 < 25 12.5 MW-38 20210707 7/7/2021 < 10 5
MW-48 20220506 5/6/2022 < 25 12.5 MW-38_20210804 8/4/2021 < 10 5
MW-48 20220603 6/3/2022 < 25 12.5 MW-39_20200916 09/16/2020 < 10 5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210212 2/12/2021 < 10 5
MW-52 20220407 4/7/2022 < 25 12.5 MW-50 20210503 5/3/2021 < 10 5
NC009000 GW DATA GENERIC RPA Part 1, data
- 8 - 9/11/2022

REASONABLE POTENTIAL ANALYSIS
15 16
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
2-Chlorotoluene Maximum data points 4-Chlorotoluene Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-29 20210603 6/3/2021 8 8 Std Dev. 8.7563 MW-19_20220406 4/6/2022 < 100 50 Std Dev. 8.7357
Dup-9 01/13/2021 1.3 1.3 Mean 9.0422 MW-19_20220601 6/1/2022 < 62.5 31.25 Mean 9.0336
Walker(48-55) 01/13/2021 1.2 1.2 C.V. 0.9684 MW-19_20210831 8/31/2021 < 50 25 C.V. 0.9670
MW-19 20220406 4/6/2022 < 100 50 n 58 MW-19_20220201 2/1/2022 < 50 25 n 58
MW-19 20220601 6/1/2022 < 62.5 31.25 MW-19_20220301 3/1/2022 < 50 25
MW-19 20210831 8/31/2021 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20220201 2/1/2022 < 50 25 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20220301 3/1/2022 < 50 25 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20220504 5/4/2022 < 50 25 MW-19 20211102 11/2/2021 < 25 12.5
MW-19 20210405 4/5/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20210504 5/4/2021 < 25 12.5 MW-19 20211201 12/1/2021 < 25 12.5
MW-19 20211102 11/2/2021 < 25 12.5 MW-48 20220408 4/8/2022 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-11 20201020 10/20/2020 < 20 10
MW-52 20220407 4/7/2022 < 25 12.5 MW-19 20210707 7/7/2021 < 20 10
MW-52 20220506 5/6/2022 < 25 12.5 MW-19 20210803 8/3/2021 < 20 10
MW-11 20201020 10/20/2020 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210709 7/9/2021 < 12.5 6.25
MW-29 20210902 9/2/2021 < 20 10 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-52 20210929 9/29/2021 < 12 6
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-19_20210308 3/8/2021 < 10 5
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-29_20210603 6/3/2021 < 10 5
MW-52 20210929 9/29/2021 < 12 6 MW-50_20201202 12/02/2020 < 10 5
MW-19 20210308 3/8/2021 < 10 5 MW-52_20220303 3/3/2022 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-21_20210603 6/3/2021 < 6.2 3.1
MW-52 20220303 3/3/2022 < 10 5 MW-21 20210707 7/7/2021 < 6.2 3.1
MW-21 20210603 6/3/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-21 20210210 2/10/2021 < 5 2.5
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-39 20200916 09/16/2020 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 1, data
- 9- 9/11/2022

REASONABLE POTENTIAL ANALYSIS
17 18
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
1,2-Dibromo-3-chloropropane (Nemago Maximum data points Dibromochloromethane (Chlorodibromome Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20211001 10/1/2021 < 200 100 Std Dev. 21.0761 MW-8_20200903 09/03/2020 3.8 3.8 Std Dev. 9.7624
MW-19 20220406 4/6/2022 < 200 100 Mean 20.6250 MW-11_20200903 09/03/2020 3.7 3.7 Mean 5.9009
MW-19 20220601 6/1/2022 < 125 62.5 C.V. 1.0219 MW-23 20200920 09/20/2020 1.5 1 C.V. 1.6544
MW-52 20210929 9/29/2021 < 120 60 n 58 MW-51 20200922 09/22/2020 1.3 1 n 58
MW-19 20210831 8/31/2021 < 100 50 MW-60 20201007 10/07/2020 1.3 1
MW-19 20220201 2/1/2022 < 100 50 Mult Factor= 1.0000 MW-61 20201203 12/03/2020 1.3 1 Mult Factor= 1.0000
MW-19_20220301 3/1/2022 < 100 50 Max. Value 100.0 pg/L MW-62_20201203 12/3/2020 1.2 1 Max. Value 50.0 pg/L
MW-19_20220504 5/4/2022 < 100 50 Max. Pred Cw 100.0 pg/L MW-62_20210105 1/5/2021 0.95 1 Max. Pred Cw 50.0 pg/L
MW-19 20210405 4/5/2021 < 50 25 MW-61 D_20210210 2/10/2021 0.89 1
MW-19 20210504 5/4/2021 < 50 25 MW-69 20210604 6/4/2021 0.88 1
MW-19 20211102 11/2/2021 < 50 25 MW-62 20210211 2/11/2021 0.85 1
DUP-2-20211102 11/2/2021 < 50 25 MW-61 D_20210407 4/7/2021 0.84 1
MW-19 20211201 12/1/2021 < 50 25 MW-19 20200916 09/16/2020 0.79 1
MW-21 20211001 10/1/2021 < 50 25 MW-69 20210507 5/7/2021 0.77 1
MW-48 20220408 4/8/2022 < 50 25 MW-54 20201006 10/06/2020 0.75 1
DUP-1-202204408 4/8/2022 < 50 25 MW-69 20210804 8/4/2021 0.72 1
MW-48 20220506 5/6/2022 < 50 25 MW-61 D_20210507 5/7/2021 0.67 1
MW-48 20220603 6/3/2022 < 50 25 MW-69 20210708 7/8/2021 0.66 1
MW-50_20210106 1/6/2021 < 50 25 MW-61D(96.5-103.5) 01/04/2021 0.65 1
MW-52 20220407 4/7/2022 < 50 25 MW-66 20210107 01/07/2021 0.63 1
MW-52 20220506 5/6/2022 < 50 25 MW-66 20210212 2/12/2021 0.62 1
MW-11_20201020 10/20/2020 < 40 20 Walker(48-55) 01/13/2021 0.62 1
MW-19_20210707 7/7/2021 < 40 20 Dup-9 01/13/2021 0.62 1
MW-19 20210803 8/3/2021 < 40 20 MW-58 20201007 10/07/2020 0.61 1
MW-19 20220105 1/5/2022 < 40 20 MW-61D 20210602 6/2/2021 0.6 1
MW-29 20210805 8/5/2021 < 40 20 MW-61 D_20210310 3/10/2021 0.59 1
MW-29 20210902 9/2/2021 < 40 20 MW-46 20200915 09/15/2020 0.58 1
MW-19 20210602 6/2/2021 < 25 12.5 MW-62 20210312 3/12/2021 0.57 1
MW-29 20210709 7/9/2021 < 25 12.5 MW-66 20210310 3/10/2021 0.55 1
DUP-2-20210709 7/9/2021 < 25 12.5 DUP-1 01/04/2021 0.55 1
MW-40 20210106 01/06/2021 < 25 12.5 MW-13_20200915 09/15/2020 0.54 1
MW-50 20220531 5/31/2022 < 25 12.5 MW-69_20210901 9/1/2021 0.54 1
MW-55 20201023 10/23/2020 < 25 12.5 MW-71_20210311 3/11/2021 0.54 1
MW-19 20210308 3/8/2021 < 20 10 MW-58_20201022 10/22/2020 0.5 1
MW-29 20210603 6/3/2021 < 20 10 MW-66_20220503 5/3/2022 0.46 1
MW-50 20201202 12/02/2020 < 20 10 MW-66_20211130 11/30/2021 0.44 1
MW-52 20220303 3/3/2022 < 20 10 DUP-2-20210901 9/1/2021 0.41 1
MW-21 20210603 6/3/2021 < 12.5 6.25 MW-66 20211004 10/4/2021 0.41 1
MW-21 20210707 7/7/2021 < 12.5 6.25 MW-69 20210929 9/29/2021 0.4 1
DUP-1-20210707 7/7/2021 < 12.5 6.25 MW-69 20211202 12/2/2021 0.4 1
MW-38 20210902 9/2/2021 < 12.5 6.25 MW-66 20211101 11/1/2021 0.39 1
MW-41 20220505 5/5/2022 < 12.5 6.25 MW-61 D_20210929 9/29/2021 0.38 1
MW-50 20201020 10/20/2020 < 12.5 6.25 MW-61 D_20210709 7/9/2021 0.36 1
MW-55 20220603 6/3/2022 < 12.5 6.25 MW-19 20220406 4/6/2022 < 100 50
MW-21 20210210 2/10/2021 < 10 5 MW-19 20220601 6/1/2022 < 62.5 31.25
MW-21 20210308 3/8/2021 < 10 5 MW-19 20210831 8/31/2021 < 50 25
MW-25 20220105 1/5/2022 < 10 5 MW-19 20220201 2/1/2022 < 50 25
MW-29 20210507 5/7/2021 < 10 5 MW-19 20220301 3/1/2022 < 50 25
MW-38 20210506 5/6/2021 < 10 5 MW-19 20220504 5/4/2022 < 50 25
MW-38 20210603 6/3/2021 < 10 5 MW-19 20210405 4/5/2021 < 25 12.5
MW-38 20210707 7/7/2021 < 10 5 MW-19 20210504 5/4/2021 < 25 12.5
MW-38 20210804 8/4/2021 < 10 5 MW-19 20211102 11/2/2021 < 25 12.5
MW-39 20200916 09/16/2020 < 10 5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-50 20210212 2/12/2021 < 10 5 MW-19 20211201 12/1/2021 < 25 12.5
MW-50 20210503 5/3/2021 < 10 5 MW-48 20220408 4/8/2022 < 25 12.5
MW-50 20211004 10/4/2021 < 10 5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-50 20211130 11/30/2021 < 10 5 MW-48 20220506 5/6/2022 < 25 12.5
DUP-2-20211130 11/30/2021 < 10 5 MW-48 20220603 6/3/2022 < 25 12.5
NC009000_GW DATA-GENERIC RPA_Part 1, data
- 10 - 9/11/2022

REASONABLE POTENTIAL ANALYSIS
19 20
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
1,2-Dibromoethane (EDB) Maximum data points Dibromomethane Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.8251
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.3612
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9427
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20211001 10/1/2021 < 40 20 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20210504 5/4/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 MW-48 20220408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20210929 9/29/2021 < 25 12.5
MW-11 20201020 10/20/2020 < 20 10 MW-52 20220407 4/7/2022 < 25 12.5
MW-19 20210707 7/7/2021 < 20 10 MW-52 20220506 5/6/2022 < 25 12.5
MW-19 20210803 8/3/2021 < 20 10 MW-11 20201020 10/20/2020 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-29 20210902 9/2/2021 < 20 10
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-21 20211001 10/1/2021 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-29 20210603 6/3/2021 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-50 20201202 12/02/2020 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-52 20220303 3/3/2022 < 10 5
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220131 1/31/2022 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 1, data
- 11 - 9/11/2022

REASONABLE POTENTIAL ANALYSIS
21 22
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
1,2-Dichlorobenzene Maximum data points 1,3-Dichlorobenzene Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-11 20201020 10/20/2020 < 20 10 MW-11 20201020 10/20/2020 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-52 20210929 9/29/2021 < 12 6
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-29 20210603 6/3/2021 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-50 20201202 12/02/2020 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-52 20220303 3/3/2022 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-39 20200916 09/16/2020 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 1, data
- 12 - 9/11/2022

Colonial Pipeline Company — 2020-L1 -SR2448 REASONABLE POTENTIAL ANALYSIS Outfall 001
NCO090000 2018 Generic RPA - 95% Probability/95% Confidence QW = 0.576 MGD
MAXIMUM DATA POINTS = 58
Qw (MGD) = 0.5760 WWTP/WTP Class: PC-1
1Q10S (cfs) = 0.21 IWC% @ 1Q10S = 80.9575626
7Q10S (cfs) = 0.25 IWC% @ 7Q10S = 78.1239062
7Q10W (cfs) = 0.42 IW%C @ 7Q10W= 68.0073126
30Q2 (cfs) = 0.56 IWC% @ 30Q2 = 61.4537445
Avg. Stream Flow, QA(cfs) = 3.90 IWC% @ QA= 18.6279419
Receiving Stream: North Prong Clark Creek HUC 30401050101 Stream Class: C
PARAMETER NC STANDARDS OR EPA CRITERIA J co REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION
TYPE Chronic Applied Acute a. n
Standard n # Det. Max Pred Cw Allowable Cw
Acute: NO WQS
Benzene C 51 HH(Qavg) 1 µg/L 58 58 9240.0
Chronic: 273.78 RPA for non-AL-apply 2/Monthly Monitoring with
Limit. Pollutant of concern for petroluem product
58 value(s) >Allowable Cw groundwater contamination.
Acute: NO WQS
Bromobenzene 1 µg/L 58 0 50.0
Chronic:------------ --------------------------------
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
Bromochloromethane 1 µg/L 58 1 50.0
Chronic:------------ --------------------------------
No standard or criteria - monitor with pollutant scan
No value >Allowable Cw
Acute: NO WQS
Bromodichloromethane (Dichlorobromomethane) C 17 HH(Qavg) 1 µg/L 58 15 50.0 _
Chronic: 91.26 No RPA Predicted Max >_ 50% of Allowable Cw-
No value > Allowable Cw apply Quarterly Monitoring
Acute: NO WQS
Bromoform C 120 HH(Qavg) 2 µg/L 58 0 50.0
Chronic:
-----644.19-- --------------------------------
No Detects
Max MDL= 100
Acute: NO WQS
Bromomethane (Methyl Bromide) NC 0.04 FW(7Q10s) 2 µg/L 58 1 500.0
Chronic:------0.05 --- --------------------------------
RPA for non-AL-apply Monitoring with Limit
58 value(s) >Allowable Cw
Acute: NO WQS
n-Butylbenzene NC 3.9 FW(7Q10s) 1 µg/L 58 7 50.0
Chronic:------4.99 --- --------------------------------
RPA for non-AL-apply Monitoring with Limit
43 value(s) >Allowable Cw
Acute: NO WQS
sec-Butyl benzene 1 µg/L 58 2 50.0
Chronic:------------ --------------------------------
No standard or criteria - monitor with pollutant scan
No value >Allowable Cw
Acute: NO WQS
tert-Butyl benzene 1 µg/L 58 0 50.0
Chronic:------------ -------------------------
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
Carbon tetrachloride C 1.6 HH(Qavg) 1 µg/L 58 0 50.0
Chronic:------8.59 --- --------------------------------
No Detects
NO DETECTS Max MDL= 100
NC009000_GW DATA—GENERIC RPA—Part 1, rpa
Page 13 of 14 9/11/2022

Colonial Pipeline Company — 2020-L1 -SR2448 REASONABLE POTENTIAL ANALYSIS Outfall 001
NCO090000 2018 Generic RPA - 95% Probability/95% Confidence QW = 0.576 MGD
Acute: NO WQS
Chlorobenzene NC 140 FW(7Q10s) 1 µg/L 58 0 50.0
Chronic:
-----179.20-- --------------------------------
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
Chloroethane 2 µg/L 58 2 100.0
Chronic: TBEL 414 - MA 104 ug/I, DM 268 ug/I
No value>Allowable Cw
Acute: NO WQS
Chloroform (Tricholomethane) NC 2000 HH(7Q 1 Os) 1 µg/L 58 41 403.0
Chronic: 2,560.04 No RPA, Predicted Max < 50% of Allowbale Cw_No
No value>Allowable Cw Monitoring required
Acute: NO WQS
Chloromethane (Methyl Chloride) NC 96 HH(7Q1Os) 2 µg/L 58 5 100.0 _
Chronic: 122.88 No RPA Predicted Max >_ 50% of Allowable Cw-
No value >Allowable Cw apply Quarterly Monitoring
Acute: NO WQS
2-Chlorotoluene 1 µg/L 58 3 50.0
Chronic:------------ --------------------------------
No standard or criteria - monitor with pollutant scan
No value>Allowable Cw
Acute: NO WQS
4-Chlorotoluene 1 µg/L 58 0 50.0
Chronic:------------ --------------------------------
NO DETECTS Max MDL 100 No Detects
Acute: NO WQS
1,2-Dibromo-3-chloropropane (Nemagon) C 0.13 HH(Qavg) 2 µg/L 58 0 100.0
Chronic:------0.70 --- --------------------------------
NO DETECTS Max MDL= 200 No Detects
Acute: NO WQS
Dibromochloromethane (Chlorodibromomethane) C 21 HH(Qavg) 2 µg/L 58 43 50.0
Chronic: 112.73 No RPA, Predicted Max < 50% of Allowbale Cw_No
No value>Allowable Cw Monitoring required
Acute: NO WQS
1,2-Dibromoethane (EDB) C 0.1 HH(Qavg) 1 µg/L 58 0 50.0
Chronic:------0.54 --- --------------------------------
NO DETECTS Max MDL= 88582 No Detects
Acute: NO WQS
Dibromomethane 1 µg/L 58 0 50.0
Chronic:------------ --------------------------------
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
1,2-Dichlorobenzene NC 470 FW(7QIOs) 1 µg/L 58 0 50.0
Chronic:
-----601.61 -- --------------------------------
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
1,3-Dichlorobenzene NC 10 HH(7Q10s) 1 µg/L 58 0 50.0
Chronic:
------12.80--- --------------------------------
No Detects
NO DETECTS Max MDL= 100
NC009000_GW DATA—GENERIC RPA—Part 1, rpa
Page 14 of 14 9/11/2022

2018 Generic RPA - 95% Probability/95% Confidence
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY MISSING DATA or ENTRY ERROR
Table 1. Project Information Table 2. Parameters of Concern
❑ CHECK IF HQW OR ORW Name Type Chronic Modifier Acute PQL Units
Facility Name Colonial Pipeline Company—2020-L1-SR2448 Par01 1,4-Dichlorobenzene NC 100 FW pg/L
WWTP/WTP Class PC-1 Par02 Dichlorodifluoromethane pg/L ?DATA?
NPDES Permit NCO090000 Par03 1,1-Dichloroethane C 100 HH pg/L
Outfall 001 Par04 1,2-Dichloroethane C 650 HH pg/L
Flow, Qw (MGD) 0.576 Par05 1,1-Dichloroethene NC 20000 HH pg/L
Receiving Stream North Prong Clark Creek Par06 cis-1,2-Dichloroethene NC 720 HH pg/L
Stream Class C Par07 trans-1,2-Dichloroethene NC 3200 HH pg/L
HUC Number 30401050101 Par08 1,2-Dichloropropane C 31 HH pg/L
7Q10s (cfs) 0.25 Par09 1,3-Dichloropropane pg/L ?DATA?
7Q10w (cfs) 0.42 Par10 2,2-Dichloropropane pg/L ?DATA?
30Q2 (cfs) 0.56 Par11 1,1-Dichloropropene pg/L ?DATA?
QA(cfs) 3.90 Par12 cis-1,3-Dichloropropene C 12 HH pg/L
1Q10s (cfs) 0.21 Par13 trans-1,3-Dichloropropene C 12 HH pg/L
Data Source(s) MW data Sep202O_Jun2O22. PQLs are from the Par14 Diisopropyl ether(Isopropyl Ether) NC 20000 FW pg/L
❑ CHECK TO APPLY MODEL NCDENR_DWR_WSS_LAB_PQLs Current
FCHECK TO APPLY MODEL Par15 Ethylbenzene NC 97 FW pg/L
Revision Date - 1/22/2021.
Par16 Hexachloro-1,3-butadiene C 18 HH pg/L
Par17 Isopropylbenzene (Cumene) NC 250 FW pg/L
Par18 Methylene Chloride C 1000 HH pg/L
Par19 Methyl-tert-butyl ether C 1500 HH pg/L
Follow directions for data entry. In some cases a Par20 Naphthalene NC 12 FW pg/L
comment menu list the available choices or a Par21 n-Propylbenzene NC 80 FW pg/L
dropdown menu will provide a list you may select Par22 Styrene pg/L ?DATA?
from. Error message occur if data entry does not
meet input criteria.
NC009000_GW DATA—GENERIC RPA_Part 2, input
8/25/2022

REASONABLE POTENTIAL ANALYSIS
1 2
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
1,4-Dichlorobenzene Maximum data points Dichlorodifluoromethane Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-11 20201020 10/20/2020 < 20 10 MW-11 20201020 10/20/2020 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-52 20210929 9/29/2021 < 12 6
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-29 20210603 6/3/2021 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-50 20201202 12/02/2020 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-52 20220303 3/3/2022 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-39 20200916 09/16/2020 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 2, data
-2 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
3 4
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
1,1-Dichloroethane Maximum data points 12-Dichloroethane Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7195
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0922
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9590
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-11 20201020 10/20/2020 < 20 10 MW-11 20201020 10/20/2020 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-52 20210929 9/29/2021 < 12 6
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-50 20201202 12/02/2020 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-52 20220303 3/3/2022 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-29 20210603 6/3/2021 8.4 8.4
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-39 20200916 09/16/2020 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 2, data
- 3 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
5 6
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
1,1-Dichloroethene Maximum data points cis-12-Dichloroethene Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-11 20201020 10/20/2020 < 20 10 MW-11 20201020 10/20/2020 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-52 20210929 9/29/2021 < 12 6
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-29 20210603 6/3/2021 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-50 20201202 12/02/2020 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-52 20220303 3/3/2022 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-39 20200916 09/16/2020 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 2, data
-4 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
7 8
Use"PASTE SPECIAL Use"PASTE SPECIAL
trans-1,2-Dichloroethene
Values"then"COPY". Values"then"COPY".
Maximum data points 12-Dichloropropane Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-11 20201020 10/20/2020 < 20 10 MW-11 20201020 10/20/2020 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-52 20210929 9/29/2021 < 12 6
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-29 20210603 6/3/2021 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-50 20201202 12/02/2020 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-52 20220303 3/3/2022 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-39 20200916 09/16/2020 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 2, data
- 5- 8/25/2022

REASONABLE POTENTIAL ANALYSIS
9 10
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
1,3-Dichloropropane Maximum data points 2,2-Dichloropropane Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.74
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.03
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.00 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-11 20201020 10/20/2020 < 20 10 MW-11 20201020 10/20/2020 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-52 20210929 9/29/2021 < 12 6
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-29 20210603 6/3/2021 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-50 20201202 12/02/2020 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-52 20220303 3/3/2022 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-39 20200916 09/16/2020 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 2, data
- 6 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
11 12
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
1,1-Dichloropropene Maximum data points cis-1,3-Dichloropropene Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-11 20201020 10/20/2020 < 20 10 MW-11 20201020 10/20/2020 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-52 20210929 9/29/2021 < 12 6
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-29 20210603 6/3/2021 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-50 20201202 12/02/2020 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-52 20220303 3/3/2022 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-39 20200916 09/16/2020 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 2, data
- 7 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
13 14
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
trans-1,3-Dichloropropene Maximum data points Diisopropyl ether (Isopropyl Ether) Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-52_20220506 5/6/2022 1010 1010 Std Dev. 210.4507
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 DUP-1-202204408 4/8/2022 933 933 Mean 305.1207
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-48 20220408 4/8/2022 905 905 C.V. 0.6897
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-48 20220506 5/6/2022 873 873 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-52 20220407 4/7/2022 647 647
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-48 20220603 6/3/2022 621 621 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-50_20210106 1/6/2021 587 587 Max. Value 1010.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-50_20201202 12/02/2020 482 482 Max. Pred Cw 1010.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20210405 4/5/2021 445 445
DUP-2-20211102 11/2/2021 < 25 12.5 MW-19 20210707 7/7/2021 371 371
MW-19 20211201 12/1/2021 < 25 12.5 MW-19 20210602 6/2/2021 354 354
MW-48 20220408 4/8/2022 < 25 12.5 MW-19 20220601 6/1/2022 353 353
DUP-1-202204408 4/8/2022 < 25 12.5 MW-19 20210504 5/4/2021 346 346
MW-48 20220506 5/6/2022 < 25 12.5 MW-52 20211203 12/3/2021 341 341
MW-48 20220603 6/3/2022 < 25 12.5 MW-19 20211201 12/1/2021 330 330
MW-50 20210106 1/6/2021 < 25 12.5 MW-19 20220406 4/6/2022 328 328
MW-52 20220407 4/7/2022 < 25 12.5 MW-38 20210902 9/2/2021 324 324
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220303 3/3/2022 320 320
MW-11 20201020 10/20/2020 < 20 10 MW-19 20220504 5/4/2022 312 312
MW-19 20210707 7/7/2021 < 20 10 MW-19 20220201 2/1/2022 308 308
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 306 306
MW-19 20211001 10/1/2021 < 20 10 MW-38 20210804 8/4/2021 302 302
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 290 290
MW-29 20210805 8/5/2021 < 20 10 MW-19 20210831 8/31/2021 287 287
MW-29 20210902 9/2/2021 < 20 10 DUP-2-20211102 11/2/2021 283 283
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20211102 11/2/2021 278 278
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210805 8/5/2021 278 278
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-1-20210707 7/7/2021 271 271
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-38 20210707 7/7/2021 264 264
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-29 20210902 9/2/2021 262 262
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-19 20220301 3/1/2022 249 249
MW-52 20210929 9/29/2021 < 12 6 MW-21 20210603 6/3/2021 249 249
MW-19 20210308 3/8/2021 < 10 5 MW-29 20210709 7/9/2021 236 236
MW-29 20210603 6/3/2021 < 10 5 MW-38 20210603 6/3/2021 230 230
MW-50 20201202 12/02/2020 < 10 5 DUP-2-20210709 7/9/2021 229 229
MW-52 20220303 3/3/2022 < 10 5 MW-19 20210308 3/8/2021 227 227
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-50 20201020 10/20/2020 208 208
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210308 3/8/2021 192 192
DUP-1-20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 181 181
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-52 20220203 2/3/2022 173 173
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-11 20201020 10/20/2020 172 172
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-29 20210603 6/3/2021 161 161
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-50 20210212 2/12/2021 161 161
MW-21 20210210 2/10/2021 < 5 2.5 MW-19 20211001 10/1/2021 160 160
MW-21 20210308 3/8/2021 < 5 2.5 MW-38 20210506 5/6/2021 159 159
MW-21 20211001 10/1/2021 < 5 2.5 MW-54 20210805 8/5/2021 149 149
MW-25 20220105 1/5/2022 < 5 2.5 MW-40 20210106 01/06/2021 146 146
MW-29 20210507 5/7/2021 < 5 2.5 MW-55 20201023 10/23/2020 144 144
MW-38 20210506 5/6/2021 < 5 2.5 MW-52 20210929 9/29/2021 140 140
MW-38 20210603 6/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 137 137
MW-38 20210707 7/7/2021 < 5 2.5 MW-52 20210902 9/2/2021 137 137
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210407 4/7/2021 136 136
MW-39 20200916 09/16/2020 < 5 2.5 MW-21 20210210 2/10/2021 130 130
MW-50 20210212 2/12/2021 < 5 2.5 MW-52 20211105 11/5/2021 125 125
MW-50 20210503 5/3/2021 < 5 2.5 MW-52 20220106 1/6/2022 120 120
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20210406 4/6/2021 114 114
DUP-2-20211130 11/30/2021 < 5 2.5 MW-50 20210312 3/12/2021 113 113
MW-50 20220103 1/3/2022 < 5 2.5 1 MW-21 20210106 01/06/2021 108 108
NC009000_GW DATA-GENERIC RPA_Part 2, data
- 8 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
15 16
Use"PASTE SPECIAL Use"PASTE SPECIAL
Ethylbenzene Values"then"COPY". Hexachloro-1'3-butadiene values"then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 1490 1490 Std Dev. 382.8826 MW-09_20210804 8/4/2021 4.2 4.2 Std Dev. 35.7597
MW-19 20220601 6/1/2022 1460 1460 Mean 338.8983 MW-56_20210804 8/4/2021 4.1 4.1 Mean 34.7397
MW-19 20220201 2/1/2022 1450 1450 C.V. 1.1298 MW-17_20210804 8/4/2021 3.8 3.8 C.V. 1.0294
MW-19 20220301 3/1/2022 1340 1340 n 58 MW-16D_20210804 8/4/2021 3.6 3.6 n 58
MW-19 20220504 5/4/2022 1210 1210 MW-62D_20220201 2/1/2022 2.8 2.8
MW-19 20211201 12/1/2021 959 959 Mult Factor= 1.0000 MW-76_20220201 2/1/2022 1.9 1.9 Mult Factor= 1.0000
MW-19_20210831 8/31/2021 864 864 Max. Value 1490.0 Ng/L MW-19_20220406 4/6/2022 < 400 200 Max. Value 200.0 pg/L
DUP-2-20211102 11/2/2021 607 607 Max. Pred Cw 1490.0 pg/L MW-19_20220601 6/1/2022 < 250 125 Max. Pred Cw 200.0 pg/L
MW-19 20211102 11/2/2021 559 559 MW-19_20210831 8/31/2021 < 200 100
MW-19 20220105 1/5/2022 557 557 MW-19_20220201 2/1/2022 < 200 100
MW-50 20210106 1/6/2021 552 552 MW-19_20220301 3/1/2022 < 200 100
MW-55 20201023 10/23/2020 457 457 MW-19_20220504 5/4/2022 < 200 100
MW-52 20220506 5/6/2022 454 454 MW-19_20210405 4/5/2021 < 100 50
MW-19 20210803 8/3/2021 445 445 MW-19_20210504 5/4/2021 < 100 50
MW-48 20220506 5/6/2022 412 412 MW-19_20211102 11/2/2021 < 100 50
MW-50 20201202 12/02/2020 406 406 DUP-2-20211102 11/2/2021 < 100 50
MW-19 20210707 7/7/2021 398 398 MW-19_20211201 12/1/2021 < 100 50
MW-19 20210405 4/5/2021 367 367 MW-48_20220408 4/8/2022 < 100 50
MW-19 20210504 5/4/2021 358 358 DUP-1-202204408 4/8/2022 < 100 50
DUP-1-202204408 4/8/2022 325 325 MW-48 20220506 5/6/2022 < 100 50
MW-48 20220408 4/8/2022 316 316 MW-48_20220603 6/3/2022 < 100 50
MW-38 20210902 9/2/2021 307 307 MW-50_20210106 1/6/2021 < 100 50
MW-1 120201020 10/20/2020 286 286 MW-52_20220407 4/7/2022 < 100 50
MW-40 20210106 01/06/2021 252 252 MW-52_20220506 5/6/2022 < 100 50
MW-19 20210602 6/2/2021 238 238 MW-11_20201020 10/20/2020 < 80 40
MW-48 20220603 6/3/2022 218 218 MW-19_20210707 7/7/2021 < 80 40
DUP-1-20210707 7/7/2021 209 209 MW-19 20210803 8/3/2021 < 80 40
MW-52 20220407 4/7/2022 208 208 MW-19_20220105 1/5/2022 < 80 40
MW-38 20210707 7/7/2021 205 205 MW-29_20210805 8/5/2021 < 80 40
MW-50 20220531 5/31/2022 154 154 MW-29_20210902 9/2/2021 < 80 40
MW-19 20210308 3/8/2021 151 151 MW-19_20210602 6/2/2021 < 50 25
MW-38 20210804 8/4/2021 150 150 MW-29_20210709 7/9/2021 < 50 25
MW-38 20210603 6/3/2021 147 147 DUP-2-20210709 7/9/2021 < 50 25
MW-50 20201020 10/20/2020 144 144 MW-40_20210106 01/06/2021 < 50 25
MW-19 20211001 10/1/2021 140 140 MW-50_20220531 5/31/2022 < 50 25
MW-39 20200916 09/16/2020 124 124 MW-55_20201023 10/23/2020 < 50 25
MW-29 20210805 8/5/2021 122 122 MW-19_20210308 3/8/2021 < 40 20
MW-29 20210709 7/9/2021 117 117 MW-29_20210603 6/3/2021 < 40 20
DUP-2-20210709 7/9/2021 115 115 MW-50 20201202 12/02/2020 < 40 20
MW-38 20210506 5/6/2021 107 107 MW-52 20220303 3/3/2022 < 40 20
MW-41 20220505 5/5/2022 99 99 MW-21 20210603 6/3/2021 < 25 12.5
MW-54 20210805 8/5/2021 98.4 98.4 MW-21 20210707 7/7/2021 < 25 12.5
MW-07 20210916 9/16/2021 92.4 92.4 DUP-1-20210707 7/7/2021 < 25 12.5
DUP-2-20220603 6/3/2022 87.6 87.6 MW-38 20210902 9/2/2021 < 25 12.5
MW-50 20220228 2/28/2022 83.8 83.8 MW-41_20220505 5/5/2022 < 25 12.5
MW-55 20220603 6/3/2022 83.2 83.2 MW-50_20201020 10/20/2020 < 25 12.5
MW-50 20220404 4/4/2022 75 75 MW-55_20220603 6/3/2022 < 25 12.5
MW-50 20220502 5/2/2022 71.3 71.3 MW-19_20211001 10/1/2021 < 24 12
MW-41 R_20220603 6/3/2022 70.2 70.2 MW-21_20210210 2/10/2021 < 20 10
MW-38 20210407 4/7/2021 68.1 68.1 MW-21_20210308 3/8/2021 < 20 10
MW-29 20210902 9/2/2021 63.1 63.1 MW-25_20220105 1/5/2022 < 20 10
MW-07 20210928 9/28/2021 59 59 MW-29_20210507 5/7/2021 < 20 10
MW-50 20211130 11/30/2021 57.5 57.5 MW-38_20210506 5/6/2021 < 20 10
MW-50 20210503 5/3/2021 57.1 57.1 MW-38_20210603 6/3/2021 < 20 10
MW-50 20220131 1/31/2022 54.7 54.7 MW-38_20210707 7/7/2021 < 20 10
MW-87 20220504 5/4/2022 54 54 MW-38_20210804 8/4/2021 < 20 10
MW-25R 20220408 4/8/2022 51.7 51.7 MW-39_20200916 09/16/2020 < 20 10
DUP-2-20211130 11/30/2021 50 50 MW-50 20210212 2/12/2021 < 20 10
NC009000_GW DATA-GENERIC RPA_Part 2, data
- 9 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
17 18
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
Isopropyl benzene (Cumene) Maximum data points Methylene Chloride Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 12.1077 MW-19_20220406 4/6/2022 < 400 200 Std Dev. 36.4630
MW-19 20220201 2/1/2022 43.1 43.1 Mean 13.4966 MW-19_20220601 6/1/2022 < 250 125 Mean 42.2466
MW-19 20220301 3/1/2022 37.5 37.5 C.V. 0.8971 MW-19_20210831 8/31/2021 < 200 100 C.V. 0.8631
MW-52 20220506 5/6/2022 37.4 37.4 n 58 MW-19_20211001 10/1/2021 < 200 100 n 58
MW-48 20220506 5/6/2022 37.2 37.2 MW-19_20220201 2/1/2022 < 200 100
MW-19 20220504 5/4/2022 33.7 33.7 Mult Factor= 1.0000 MW-19_20220301 3/1/2022 < 200 100 Mult Factor= 1.0000
MW-48_20220603 6/3/2022 32 32 Max. Value 50.0 pg/L MW-19_20220504 5/4/2022 < 200 100 Max. Value 200.0 pg/L
MW-19_20220601 6/1/2022 < 62.5 31.25 Max. Pred Cw 50.0 pg/L MW-11_20201020 10/20/2020 99.8 99.8 Max. Pred Cw 200.0 pg/L
DUP-1-202204408 4/8/2022 30.5 30.5 DUP-2-20210709 7/9/2021 80 80
MW-48 20220408 4/8/2022 27.9 27.9 MW-50_20220404 4/4/2022 67.8 67.8
MW-19 20211201 12/1/2021 27.6 27.6 MW-52_20210929 9/29/2021 < 120 60
MW-55 20201023 10/23/2020 26.5 26.5 MW-19_20210405 4/5/2021 < 100 50
MW-19 20210831 8/31/2021 < 50 25 MW-19_20210504 5/4/2021 < 100 50
MW-52 20220407 4/7/2022 23.4 23.4 MW-19_20211102 11/2/2021 < 100 50
MW-55 20220603 6/3/2022 20.8 20.8 DUP-2-20211102 11/2/2021 < 100 50
MW-19 20210405 4/5/2021 < 25 12.5 MW-19_20211201 12/1/2021 < 100 50
MW-19 20210504 5/4/2021 < 25 12.5 MW-48_20220408 4/8/2022 < 100 50
MW-19 20211102 11/2/2021 < 25 12.5 DUP-1-202204408 4/8/2022 < 100 50
DUP-2-20211102 11/2/2021 < 25 12.5 MW-48 20220506 5/6/2022 < 100 50
MW-50 20210106 1/6/2021 < 25 12.5 MW-48_20220603 6/3/2022 < 100 50
MW-50 20201202 12/02/2020 10.3 10.3 MW-50_20210106 1/6/2021 < 100 50
MW-1 120201020 10/20/2020 < 20 10 MW-52_20220407 4/7/2022 < 100 50
MW-19 20210707 7/7/2021 < 20 10 MW-52_20220506 5/6/2022 < 100 50
MW-19 20210803 8/3/2021 < 20 10 MW-50_20210503 5/3/2021 44.2 44.2
MW-19 20211001 10/1/2021 < 20 10 MW-19_20210707 7/7/2021 < 80 40
MW-19 20220105 1/5/2022 < 20 10 MW-19_20210803 8/3/2021 < 80 40
MW-29 20210805 8/5/2021 < 20 10 MW-19_20220105 1/5/2022 < 80 40
MW-29 20210902 9/2/2021 < 20 10 MW-29_20210805 8/5/2021 < 80 40
MW-38 20210902 9/2/2021 9 9 MW-29_20210902 9/2/2021 < 80 40
MW-61 20220506 5/6/2022 8.9 8.9 MW-50_20201020 10/20/2020 35.8 35.8
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19_20210602 6/2/2021 < 50 25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-21_20211001 10/1/2021 < 50 25
DUP-2-20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 50 25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40_20210106 01/06/2021 < 50 25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50_20220531 5/31/2022 < 50 25
MW-50 20211130 11/30/2021 6.2 6.2 MW-55_20201023 10/23/2020 < 50 25
DUP-2-20211130 11/30/2021 6.2 6.2 MW-50 20220131 1/31/2022 21.9 21.9
DUP-2-20220603 6/3/2022 5.8 5.8 MW-19 20210308 3/8/2021 < 40 20
DUP-1-20210707 7/7/2021 5.7 5.7 MW-29 20210603 6/3/2021 < 40 20
MW-38 20210707 7/7/2021 5.7 5.7 MW-50_20201202 12/02/2020 < 40 20
MW-41 20220505 5/5/2022 5.6 5.6 MW-52_20220303 3/3/2022 < 40 20
MW-50 20210706 7/6/2021 5.1 5.1 MW-21_20210603 6/3/2021 < 25 12.5
MW-19 20210308 3/8/2021 < 10 5 MW-21_20210707 7/7/2021 < 25 12.5
MW-29 20210603 6/3/2021 < 10 5 DUP-1-20210707 7/7/2021 < 25 12.5
MW-52 20220303 3/3/2022 < 10 5 MW-38_20210902 9/2/2021 < 25 12.5
MW-41 R_20220603 6/3/2022 5 5 MW-41_20220505 5/5/2022 < 25 12.5
MW-52 20210929 9/29/2021 4.5 4.5 MW-55_20220603 6/3/2022 < 25 12.5
MW-25 20220105 1/5/2022 4.4 4.4 DUP-2-20220603 6/3/2022 10.8 10.8
MW-38 20210603 6/3/2021 4.4 4.4 MW-21_20210210 2/10/2021 < 20 10
MW-50 20220103 1/3/2022 4.2 4.2 MW-21_20210308 3/8/2021 < 20 10
MW-52 20211203 12/3/2021 4.2 4.2 MW-25 20220105 1/5/2022 < 20 10
MW-25R 20220408 4/8/2022 4.1 4.1 MW-29_20210507 5/7/2021 < 20 10
MW-50 20220228 2/28/2022 4 4 MW-38_20210506 5/6/2021 < 20 10
MW-38 20210804 8/4/2021 3.9 3.9 MW-38_20210603 6/3/2021 < 20 10
MW-50 20220131 1/31/2022 3.7 3.7 MW-38_20210707 7/7/2021 < 20 10
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-38_20210804 8/4/2021 < 20 10
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-39_20200916 09/16/2020 < 20 10
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50 20210212 2/12/2021 < 20 10
NC009000 GW DATA GENERIC RPA Part 2, data
- 10 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
19 20
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
Methyl-tent-butyl ether Maximum data points Naphthalene Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-50 20210106 1/6/2021 392 392 Std Dev. 68.8752 MW-19_20220201 2/1/2022 314 314 Std Dev. 70.3560
MW-50 20201202 12/02/2020 287 287 Mean 85.0578 MW-19_20220406 4/6/2022 276 276 Mean 83.0172
DUP-1-202204408 4/8/2022 228 228 C.V. 0.8097 MW-19 20220301 3/1/2022 244 244 C.V. 0.8475
MW-48 20220408 4/8/2022 217 217 n 58 MW-19 20220601 6/1/2022 243 243 n 58
MW-52 20220506 5/6/2022 204 204 MW-19 20220504 5/4/2022 243 243
MW-48 20220506 5/6/2022 171 171 Mult Factor= 1.0000 MW-48 20220506 5/6/2022 197 197 Mult Factor= 1.0000
MW-52_20220407 4/7/2022 166 166 Max. Value 392.0 pg/L MW-52_20220506 5/6/2022 170 170 Max. Value 314.0 pg/L
MW-50_20201020 10/20/2020 138 138 Max. Pred Cw 392.0 pg/L MW-48_20220603 6/3/2022 163 163 Max. Pred Cw 314.0 pg/L
MW-38 20210804 8/4/2021 134 134 MW-19 20210308 3/8/2021 155 155
MW-19 20210405 4/5/2021 120 120 MW-19 20210831 8/31/2021 146 146
MW-21 20210603 6/3/2021 117 117 DUP-1-202204408 4/8/2022 127 127
MW-50 20210212 2/12/2021 116 116 MW-52 20220407 4/7/2022 124 124
MW-38 20210902 9/2/2021 115 115 MW-48 20220408 4/8/2022 116 116
DUP-1-20210707 7/7/2021 113 113 MW-19 20211201 12/1/2021 113 113
MW-38 20210707 7/7/2021 109 109 MW-50 20210106 1/6/2021 111 111
MW-19 20210504 5/4/2021 99.9 99.9 DUP-2-20211102 11/2/2021 103 103
MW-21 20210308 3/8/2021 92.3 92.3 MW-19 20220105 1/5/2022 91.6 91.6
MW-48 20220603 6/3/2022 89.6 89.6 MW-19 20211102 11/2/2021 91.1 91.1
MW-38 20210603 6/3/2021 87.8 87.8 MW-19 20210504 5/4/2021 88.3 88.3
MW-21 20210707 7/7/2021 87 87 MW-55 20201023 10/23/2020 85.7 85.7
MW-19 20210602 6/2/2021 80.5 80.5 MW-40 20210106 01/06/2021 78.4 78.4
MW-19 20210707 7/7/2021 76.9 76.9 MW-55 20220603 6/3/2022 75.5 75.5
MW-52 20220303 3/3/2022 73.4 73.4 MW-19 20210707 7/7/2021 68.5 68.5
MW-38 20210506 5/6/2021 72.7 72.7 MW-50_20201202 12/02/2020 68.3 68.3
MW-52 20211203 12/3/2021 72.4 72.4 MW-38_20210902 9/2/2021 64.6 64.6
MW-21 20210210 2/10/2021 68.7 68.7 MW-19_20210803 8/3/2021 63.6 63.6
MW-19 20210308 3/8/2021 65.7 65.7 MW-50_20220131 1/31/2022 61.6 61.6
MW-19 20210803 8/3/2021 60.8 60.8 DUP-2-20210709 7/9/2021 60.6 60.6
MW-19 20210831 8/31/2021 60.5 60.5 MW-50 20210212 2/12/2021 54 54
MW-50 20210312 3/12/2021 59.6 59.6 MW-50 20220531 5/31/2022 51.5 51.5
MW-21 20210505 5/5/2021 53.9 53.9 MW-19 20210405 4/5/2021 < 100 50
MW-19 20211201 12/1/2021 53.2 53.2 MW-19 20211001 10/1/2021 48 48
DUP-2-20211102 11/2/2021 52.7 52.7 MW-50 20210312 3/12/2021 45.8 45.8
MW-19 20220105 1/5/2022 52.4 52.4 MW-19 20210602 6/2/2021 43.8 43.8
MW-19 20211102 11/2/2021 51.3 51.3 MW-21 20210603 6/3/2021 43.7 43.7
MW-38 20210407 4/7/2021 50.2 50.2 MW-29 20210902 9/2/2021 42.7 42.7
MW-19 20220406 4/6/2022 < 100 50 MW-52 20220303 3/3/2022 41.4 41.4
MW-21 20210106 01/06/2021 50 50 MW-11 20201020 10/20/2020 < 80 40
MW-50 20210406 4/6/2021 46.9 46.9 DUP-2-20211130 11/30/2021 38.1 38.1
DUP-2-20210709 7/9/2021 46.7 46.7 MW-50 20211130 11/30/2021 38 38
MW-19 20220504 5/4/2022 45.6 45.6 MW-50_20220228 2/28/2022 36.1 36.1
MW-19 20220201 2/1/2022 43.7 43.7 MW-41_20220505 5/5/2022 34.9 34.9
MW-29 20210709 7/9/2021 43.3 43.3 DUP-2-20220603 6/3/2022 34 34
MW-19 20211001 10/1/2021 42 42 MW-19_20210210 2/10/2021 33.2 33.2
MW-21 20211001 10/1/2021 41 41 MW-50_20220103 1/3/2022 32.7 32.7
MW-21 20220405 4/5/2022 40.8 40.8 MW-52_20211203 12/3/2021 32.6 32.6
MW-21 20220601 6/1/2022 39.5 39.5 MW-50 20210503 5/3/2021 32 32
MW-50 20210503 5/3/2021 38.1 38.1 MW-50 20220404 4/4/2022 30.8 30.8
MW-29 20210805 8/5/2021 38 38 MW-41 R_20220603 6/3/2022 29.8 29.8
MW-52 20220203 2/3/2022 37.9 37.9 MW-50 20220502 5/2/2022 28.9 28.9
DUP-1-20210310 3/10/2021 35.1 35.1 MW-29 20210603 6/3/2021 27.8 27.8
MW-38 20210310 3/10/2021 33.4 33.4 MW-50 20210706 7/6/2021 27.5 27.5
MW-29 20210902 9/2/2021 32 32 MW-72R 20220506 5/6/2022 27.4 27.4
MW-19 20220601 6/1/2022 < 62.5 31.25 MW-29 20210805 8/5/2021 26.4 26.4
MW-11 20201020 10/20/2020 29.5 29.5 MW-25 20220105 1/5/2022 25.9 25.9
MW-19 20210210 2/10/2021 28 28 MW-52 20211105 11/5/2021 25.5 25.5
MW-52 20210929 9/29/2021 27 27 DUP-1-20210707 7/7/2021 25.1 25.1
MW-52 20211105 11/5/2021 25.1 25.1 MW-29 20210709 7/9/2021 24.6 24.6
NC009000_GW DATA-GENERIC RPA_Part 2, data
- 11 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
21 22
Use"PASTE SPECIAL Use"PASTE SPECIAL
n-Propylbenzene Values"then"COPY". Styrene Values"then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220201 2/1/2022 120 120 Std Dev. 29.1778 MW-19_20220406 4/6/2022 < 100 50 Std Dev. 8.7252
MW-19 20220301 3/1/2022 89.8 89.8 Mean 23.9509 MW-19_20220601 6/1/2022 < 62.5 31.25 Mean 9.0612
MW-19 20220406 4/6/2022 89.2 89.2 C.V. 1.2182 MW-19_20210831 8/31/2021 < 50 25 C.V. 0.9629
MW-19 20220601 6/1/2022 83.8 83.8 n 58 MW-19_20220201 2/1/2022 < 50 25 n 58
MW-48 20220506 5/6/2022 82.6 82.6 MW-19_20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 75.6 75.6 Mult Factor = 1.0000 MW-19_20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-52_20220506 5/6/2022 69.7 69.7 Max. Value 120.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20211201 12/1/2021 66.8 66.8 Max. Pred Cw 120.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 Ng/L
DUP-1-202204408 4/8/2022 66 66 MW-19 20211102 11/2/2021 < 25 12.5
MW-48 20220408 4/8/2022 62.3 62.3 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20210831 8/31/2021 57.6 57.6 MW-19 20211201 12/1/2021 < 25 12.5
MW-48 20220603 6/3/2022 54.5 54.5 MW-48 20220408 4/8/2022 < 25 12.5
DUP-2-20211102 11/2/2021 43.2 43.2 DUP-1-202204408 4/8/2022 < 25 12.5
MW-52 20220407 4/7/2022 39.9 39.9 MW-48_20220506 5/6/2022 < 25 12.5
MW-61 20220506 5/6/2022 27.4 27.4 MW-48_20220603 6/3/2022 < 25 12.5
MW-55 20220603 6/3/2022 25.9 25.9 MW-50_20210106 1/6/2021 < 25 12.5
MW-19 20220105 1/5/2022 18.2 18.2 MW-52_20220407 4/7/2022 < 25 12.5
DUP-1-20210707 7/7/2021 12.8 12.8 MW-52 20220506 5/6/2022 < 25 12.5
MW-19 20210405 4/5/2021 < 25 12.5 MW-11_20201020 10/20/2020 < 20 10
MW-19 20210504 5/4/2021 < 25 12.5 MW-19_20210707 7/7/2021 < 20 10
MW-19 20211102 11/2/2021 < 25 12.5 MW-19_20210803 8/3/2021 < 20 10
MW-50 20210106 1/6/2021 < 25 12.5 MW-19_20211001 10/1/2021 < 20 10
MW-38 20210707 7/7/2021 12.3 12.3 MW-19_20220105 1/5/2022 < 20 10
MW-50 20220531 5/31/2022 10.4 10.4 MW-29_20210805 8/5/2021 < 20 10
MW-11 20201020 10/20/2020 < 20 10 MW-29_20210902 9/2/2021 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19_20210602 6/2/2021 < 12.5 6.25
MW-19 20210803 8/3/2021 < 20 10 MW-29_20210709 7/9/2021 < 12.5 6.25
MW-29 20210805 8/5/2021 < 20 10 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-29 20210902 9/2/2021 < 20 10 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220103 1/3/2022 9.1 9.1 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-25R 20220408 4/8/2022 8.6 8.6 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-50 20220131 1/31/2022 8.5 8.5 MW-52 20210929 9/29/2021 < 12 6
MW-41 20220505 5/5/2022 8.3 8.3 MW-19 20210308 3/8/2021 < 10 5
MW-50 20220404 4/4/2022 8.3 8.3 MW-50 20201202 12/02/2020 < 10 5
MW-50 20210706 7/6/2021 8 8 MW-52 20220303 3/3/2022 < 10 5
DUP-2-20220603 6/3/2022 7.9 7.9 MW-29 20210603 6/3/2021 6.6 6.6
MW-50 20220228 2/28/2022 7.4 7.4 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-19 20211001 10/1/2021 7.2 7.2 MW-21 20210707 7/7/2021 < 6.2 3.1
MW-25 20220105 1/5/2022 7.2 7.2 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210804 8/4/2021 7 7 MW-38_20210902 9/2/2021 < 6.2 3.1
MW-07 20210916 9/16/2021 6.4 6.4 MW-41_20220505 5/5/2022 < 6.2 3.1
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-50_20201020 10/20/2020 < 6.2 3.1
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-55_20220603 6/3/2022 < 6.2 3.1
DUP-2-20210709 7/9/2021 < 12.5 6.25 MW-21 20210210 2/10/2021 < 5 2.5
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-21 20210308 3/8/2021 < 5 2.5
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-21 20211001 10/1/2021 < 5 2.5
MW-41 R20220603 6/3/2022 6.2 6.2 MW-25 20220105 1/5/2022 < 5 2.5
MW-52 20210929 9/29/2021 < 12 6 MW-29 20210507 5/7/2021 < 5 2.5
MW-50 20220502 5/2/2022 5.9 5.9 MW-38 20210506 5/6/2021 < 5 2.5
MW-19 20210308 3/8/2021 < 10 5 MW-38 20210603 6/3/2021 < 5 2.5
MW-29 20210603 6/3/2021 < 10 5 MW-38 20210707 7/7/2021 < 5 2.5
MW-50 20201202 12/02/2020 < 10 5 MW-38 20210804 8/4/2021 < 5 2.5
MW-52 20220303 3/3/2022 < 10 5 MW-39 20200916 09/16/2020 < 5 2.5
MW-72R 20220506 5/6/2022 4.6 4.6 MW-50 20210212 2/12/2021 < 5 2.5
MW-87 20220504 5/4/2022 3.7 3.7 MW-50 20210503 5/3/2021 < 5 2.5
MW-03 20220302 3/2/2022 3.4 3.4 MW-50 20211130 11/30/2021 < 5 2.5
MW-21 20210603 6/3/2021 < 6.2 3.1 DUP-2-20211130 11/30/2021 < 5 2.5
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000 GW DATA GENERIC RPA Part 2, data
- 12 - 8/25/2022

Colonial Pipeline Company — 2020-L1-SR2448 REASONABLE POTENTIAL ANALYSIS Outfall 001
NCO090000 2018 Generic RPA - 95% Probability/95% Confidence QW = 0.576 MGD
MAXIMUM DATA POINTS = 58
Qw (MGD)= 0.5760 WWTP/WTP Class: PC-1
1Q10S (cfs) = 0.21 IWC% @ 1Q10S = 80.9575626
7Q10S (cfs) = 0.25 IWC% @ 7Q10S = 78.1239062
7Q10W(cfs) = 0.42 IW%C @ 7Q10W= 68.0073126
30Q2 (cfs)= 0.56 IWC% @ 30Q2 = 61.4537445
Avg. Stream Flow, QA(cfs)= 3.90 IWC% @ QA= 18.6279419
Receiving Stream: North Prong Clark Creek HUC 30401050101 Stream Class: C
PARAMETER NC STANDARDS OR EPA CRITERIA J Cn REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION
TYPE Chronic Standard Acute D n #Det. Max Pred Cw Allowable Cw
Acute: NO WQS
1,4-Dichlorobenzene NC 100 FW(7Q1Os) µg/L 58 0 50.0 _ _ _ ----_-_-_
Chronic - --------------------------
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
Dichlorodifluoromethane µg/L 58 0 50.0 _ _ _
Chronic:----------------------------------------
hronic---------- --------------------------
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
1,1-Dichloroethane C 100 HH(Qavg) µg/L 58 0 50.0 _ _ _ ----_-_-_
Chronic: ------------------------------
hronic - --------------------------
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
_
1,2-Dichloroethane C 650 HH(Qavg) µg/L 58 1 50.0 _ _ _____ _ __ _ ___ _ _ _ _ _ _ _ _ ___
Chronic 3,489.38 No RPA, Predicted Max< 50% of Allowbale Cw.
Pollutant of concern for petroluem product
No value >Allowable Cw groundwater contamination - Monitor with Limit.
Acute: NO WQS
1,1-Dichloroethene NC 20000 HH(7Q10s) µg/L 58 0 50.0 _ _ _ ___ _ ____ __________________________
Chronic 25,600 36
No Detects
NO DETECTS Max MDL= 100
Acute: NO WQS
cis-1,2-Dichloroethene NC 720 HH(7Q10s) µg/L 58 0 50.0 _ _ _ ----_-_-_
Chronic: ------------------------------
hronic - --------------------------
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
trans-1,2-Dichloroethene NC 3200 HH(7Q10s) µg/L 58 0 50.0 _ _ _ _____ _ __ __________________________
Chronic 4,096.06
No Detects
NO DETECTS Max MDL= 100
Acute: NO WQS
1,2-Dichloropropane C 31 HH(Qavg) µg/L 58 0 50.0 _ _ _ ----_-_-_
Chronic: ------------------------------
hronic - --------------------------
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
1,3-Dichloropropane µg/L 58 0 50.0 _ _ _
---------- --------------------------
Chronic No Standard, Criteria or TBEL. No Detects.
NO DETECTS Max MDL= 100
NC009000_GW DATA—GENERIC RPA—Part 2, rpa
Page 13 of 14 8/25/2022

Colonial Pipeline Company — 2020-L1 -SR2448 REASONABLE POTENTIAL ANALYSIS Outfall 001
NCOO9OOOO 2018 Generic RPA - 95% Probability/95% Confidence QW = 0.576 MGD
Acute: NO WQS
2,2-Dichloropropane µg/L 58 0 50.0 1
Chronic: --------------------------
No Standard, Criteria or TBEL. No Detects.
NO DETECTS Max MDL= 100
Acute: NO WQS
1,1-Dichloropropene µg/L 58 0 50.0 _ _ _
----------- --------------------------
Chronic:
No Standard, Criteria or TBEL. No Detects.
NO DETECTS Max MDL= 100
Acute: NO WQS
cis-1,3-Dichloropropene C 12 HH(Qavg) µg/L 58 0 50.0 _ _ _ ----_ _
Chronic - --- --------------------------
4.42
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
trans-1,3-Dichloropropene C 12 HH(Qavg) µg/L 58 0 50.0 _ _ _ ----_ _
Chronic - --- --------------------------
4.42
NO DETECTS Max MDL= 100 No Detects
Acute: NO WQS
_
Diisopropyl ether(Isopropyl Ether) NC 20000 FW(7Q lOs) µg/L 58 58 1010.0 _ _ ___ _ _ __ _ ___ _ _ _ _ _ _ _ _ _ _
Chronic 25,600.36 No RPA, Predicted Max < 50% of Allowbale Cw- No
No value >Allowable Cw Monitoring required
Acute: NO WQS
Ethylbenzene NC 97 FW(7Q 1 Os) µg/L 58 58 1490.0 _ _ _ _____ _ _ _ _ _ ___ _ _ _ _ _ _ _ _
Chronic 124.16 RPA for non-AL- apply Monthly Monitoring with Limit.
Pollutant of concern for petroluem product
35 value(s)>Allowable Cw groundwater contamination.
Acute: NO WQS
Hexachloro-1,3-butadiene C 18 HH(Qavg) µg/L 58 6 200.0 _ _ _ _
---- - --- --------------------------Chronic RPA for non-AL- apply Monitoring with Limit
6 value(s) >Allowable Cw
Acute: NO WQS
Isopropylbenzene (Cumene) NC 250 FW(7Q10s) µg/L 58 32 50.0 _ _ _ _____ _ __ _ ___ _ _ _ _ _ _ _ _ _ _
Chronic 320.00 No RPA, Predicted Max < 50% of Allowbale Cw- No
No value >Allowable Cw Monitoring required
Acute: NO WQS
Methylene Chloride C 1000 HH(Qavg) µg/L 58 7 200.0 _ _ _ _____ _ __ _ ___ _ _ _ _ _ _ _ _ _ _
Chronic 5,368.28 No RPA, Predicted Max< 50% of Allowbale Cw- No
No value >Allowable Cw Monitoring required
Acute: NO WQS
Methyl-tert-butyl ether C 1500 HH(Qavg) µg/L 58 56 392.0 _ _ _ _____ _ __ _ ___ _ _ _ _ _ _ _ _ ___
Chronic 8,052.42 No RPA, Predicted Max< 50% of Allowbale Cw.
Pollutant of concern for Petrolueum products -Monitor
No value >Allowable Cw with Limit.
Acute: NO WQS
_
Naphthalene NC 12 FW(7Q 1 Os) µg/L 58 56 314.0 _ _ _____ _ __ _ _ _ ___ _ _ _ _ _ _____
Chronic 15.36 RPA for non-AL- apply Monitoring with Limit.
Pollutant of concern for petroluem product
58 value(s) >Allowable Cw groundwater contamination.
Acute: NO WQS
n-Propylbenzene NC 80 FW(7Q10s) µg/L 58 37 120.0 _ _ _ ----_ _ _
- --------------------------Chronic 102.40 RPA for non-AL- apply Monitoring with Limit
1 value(s) >Allowable Cw
Acute: NO WQS
Styrene µg/L 58 1 50.0 _ _ _
---------- --------------------------
Chronic No Standard, Criteria or TBEL. No Detects.
No value >Allowable Cw
NC009000_GW DATA—GENERIC RPA—Part 2, rpa
Page 14 of 14 8/25/2022

2018 Generic RPA - 95% Probability/95% Confidence
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY MISSING DATA or ENTRY ERROR
Table 1. Project Information Table 2. Parameters of Concern
❑ CHECK IF HQW OR ORW Name Type Chronic Modifier Acute PQL Units
Facility Name Colonial Pipeline Company—2020-L1-SR2448 Par01 1,1,1,2-Tetrachloroethane pg/L ?DATA?
WWTP/WTP Class PC-1 Par02 1,1,2,2-Tetrachloroethane C 4 HH pg/L
NPDES Permit NCO090000 Par03 Tetrachloroethene(Tetrachloroethylene)(PERC) C 3.3 HH pg/L
Outfall 001 Par04 Toluene NC 11 FW pg/L
Flow, Qw (MGD) 0.576 Par05 1,2,3-Trichlorobenzene pg/L ?DATA?
Receiving Stream North Prong Clark Creek Par06 1,2,4-Trichlorobenzene NC 0.076 HH pg/L
Stream Class C Par07 1,1,1-Trichloroethane C 2500 FW pg/L
HUC Number 30401050101 Par08 1,1,2-Trichloroethane C 8.9 HH pg/L
7Q10s (cfs) 0.25 Par09 Trichloroethene C 30 HH pg/L
7Q10w (cfs) 0.42 Par10 Trichlorofluoromethane (Freon 11) NC 67000 HH pg/L
30Q2 (cfs) 0.56 Par11 1,2,3-Trichloropropane (1,2,3-TCP) C 0.001 HH pg/L
QA(cfs) 3.90 Par12 1,2,4-Trim ethyl benzene NC 390 FW pg/L
1Q10s (cfs) 0.21 Par13 1,3,5-Trim ethyl benzene NC 215 HH pg/L
Data Source(s) MW data Sep202O_Jun2O22. PQLs are from the Par14 Vinyl chloride C 2.4 HH pg/L
❑ CHECK TO APPLY MODEL NCDENR_DWR_WSS_LAB_PQLs Current
FCHECK TO APPLY MODEL Par15 Xylene (Total) NC 670 FW pg/L
Revision Date - 1/22/2021.
Par16 m&p-Xylene NC 420 FW pg/L
Par17 o-Xylene NC 600 FW pg/L
Par18 C5 - C8 Aliphatics NC 180 FW pg/L
Par19 C9 - C12 Aliphatics NC 180 FW pg/L
p
Follow directions for data entry. In some cases a Par20 C9 - C10 Aromatics NC 4000 HH g/L
comment menu list the available choices or a Par21 VPH (Total) mg/L ?DATA?
dropdown menu will provide a list you may select Par22
from. Error message occur if data entry does not
meet input criteria.
NC009000_GW DATA—GENERIC RPA_Part 3, input
8/25/2022

REASONABLE POTENTIAL ANALYSIS
1 2
Use"PASTE SPECIAL Use"PASTE SPECIAL
1,1,1,2-Tetrachloroethane
Values"then"COPY". Values"then"COPY".
Maximum data points 1,1,2,2-Tetrachloroethane Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-11 20201020 10/20/2020 < 20 10 MW-11 20201020 10/20/2020 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-52 20210929 9/29/2021 < 12 6
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-29 20210603 6/3/2021 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-50 20201202 12/02/2020 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-52 20220303 3/3/2022 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-39 20200916 09/16/2020 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 3, data
-2 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
3 4
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
Tetrachloroethene (Tetrachloroethylene) ( Maximum data points Toluene Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-13 20200915 09/15/2020 4.4 4.4 Std Dev. 9.6275 MW-19 20220601 6/1/2022 22800 22800 Std Dev. 4844.1463
MW-11 20200903 09/03/2020 4.1 4.1 Mean 7.4940 MW-19 20220406 4/6/2022 22200 22200 Mean 4613.2069
MW-13 20201007 10/07/2020 2.8 2.8 C.V. 1.2847 MW-19 20220504 5/4/2022 16400 16400 C.V. 1.0501
MW-17 20200916 09/16/2020 2.7 2.7 n 58 MW-19 20220301 3/1/2022 14400 14400 n 58
MW-19 20201007 10/07/2020 2.6 2.6 MW-19 20220201 2/1/2022 13300 13300
MW-19 20200916 09/16/2020 2.4 2.4 Mult Factor= 1.0000 MW-19 20210831 8/31/2021 10500 10500 Mult Factor= 1.0000
MW-11_20200913 09/13/2020 1.9 1.9 Max. Value 50.0 pg/L MW-19_20211201 12/1/2021 9280 9280 Max. Value 22800.0 pg/L
MW-17_20210210 2/10/2021 1.4 1.4 Max. Pred Cw 50.0 pg/L MW-19_20210405 4/5/2021 7000 7000 Max. Pred Cw 22800.0 pg/L
MW-19 20201202 12/02/2020 1.4 1.4 MW-19 20220105 1/5/2022 6870 6870
MW-21 20200916 09/16/2020 1.3 1.3 MW-50 20210106 1/6/2021 6590 6590
MW-13 20201020 10/20/2020 1.2 1.2 DUP-1-202204408 4/8/2022 6350 6350
MW-17 20201020 10/20/2020 1.2 1.2 MW-19 20210504 5/4/2021 6300 6300
MW-13 20201202 12/02/2020 1.1 1.1 MW-48 20220408 4/8/2022 6240 6240
MW-13 20210312 3/12/2021 1.1 1.1 DUP-2-20211102 11/2/2021 6080 6080
MW-13 20210601 6/1/2021 1.1 1.1 MW-52_20220506 5/6/2022 5960 5960
MW-19 20201020 10/20/2020 1.1 1.1 MW-19_20210707 7/7/2021 5750 5750
MW-13 20210505 5/5/2021 0.94 0.94 MW-19_20210803 8/3/2021 5710 5710
MW-19 20210106 01/06/2021 0.93 0.93 MW-19_20211102 11/2/2021 5520 5520
MW-21 20201020 10/20/2020 0.93 0.93 MW-48 20220506 5/6/2022 5050 5050
MW-13 20210106 01/06/2021 0.85 0.85 MW-29_20210805 8/5/2021 4970 4970
MW-21 20201201 12/01/2020 0.82 0.82 MW-19_20210602 6/2/2021 4740 4740
MW-17 20210308 3/8/2021 0.77 0.77 MW-40 20210106 01/06/2021 4460 4460
MW-13 20210212 2/12/2021 0.69 0.69 MW-11 20201020 10/20/2020 4370 4370
MW-17 20210804 8/4/2021 0.69 0.69 MW-29 20210902 9/2/2021 4360 4360
MW-17 20201201 12/01/2020 0.61 0.61 MW-19 20211001 10/1/2021 4000 4000
MW-13 20210706 7/6/2021 0.59 0.59 MW-29 20210709 7/9/2021 3860 3860
MW-13 20210406 4/6/2021 0.58 0.58 MW-50 20220531 5/31/2022 3810 3810
DUP-1-20210706 7/6/2021 0.58 0.58 MW-50 20201202 12/02/2020 3760 3760
MW-17 20210407 4/7/2021 0.53 0.53 DUP-2-20210709 7/9/2021 3640 3640
MW-17 20210505 5/5/2021 0.52 0.52 MW-55 20201023 10/23/2020 3590 3590
MW-17 20210602 6/2/2021 0.51 0.51 MW-48 20220603 6/3/2022 2760 2760
MW-17 20210707 7/7/2021 0.49 0.49 MW-52 20220407 4/7/2022 2550 2550
MW-17 20210930 9/30/2021 0.33 0.33 MW-19 20210308 3/8/2021 2440 2440
MW-13 20211004 10/4/2021 0.24 0.24 MW-29 20210603 6/3/2021 2400 2400
MW-19 20220406 4/6/2022 < 100 50 MW-39 20200916 09/16/2020 1980 1980
MW-19 20220601 6/1/2022 < 62.5 31.25 MW-50 20201020 10/20/2020 1980 1980
MW-19 20210831 8/31/2021 < 50 25 MW-50 20220502 5/2/2022 1830 1830
MW-19 20220201 2/1/2022 < 50 25 MW-54 20210805 8/5/2021 1670 1670
MW-19 20220301 3/1/2022 < 50 25 MW-50 20220228 2/28/2022 1570 1570
MW-19 20220504 5/4/2022 < 50 25 MW-50 20220131 1/31/2022 1550 1550
MW-19 20210405 4/5/2021 < 25 12.5 MW-50 20220404 4/4/2022 1550 1550
MW-19 20210504 5/4/2021 < 25 12.5 MW-50 20211130 11/30/2021 1460 1460
MW-19 20211102 11/2/2021 < 25 12.5 MW-41 20220505 5/5/2022 1410 1410
DUP-2-20211102 11/2/2021 < 25 12.5 MW-50 20220103 1/3/2022 1380 1380
MW-19 20211201 12/1/2021 < 25 12.5 MW-50 20210503 5/3/2021 1310 1310
MW-48 20220408 4/8/2022 < 25 12.5 DUP-2-20211130 11/30/2021 1270 1270
DUP-1-202204408 4/8/2022 < 25 12.5 MW-54 20210604 6/4/2021 1200 1200
MW-48 20220506 5/6/2022 < 25 12.5 MW-29 20210507 5/7/2021 1170 1170
MW-48 20220603 6/3/2022 < 25 12.5 MW-54 20210506 5/6/2021 999 999
MW-50 20210106 1/6/2021 < 25 12.5 MW-25 20220105 1/5/2022 911 911
MW-52 20220407 4/7/2022 < 25 12.5 MW-40 20201201 12/01/2020 829 829
MW-52 20220506 5/6/2022 < 25 12.5 DUP-2-20220603 6/3/2022 823 823
MW-1 120201020 10/20/2020 < 20 10 MW-38_20210902 9/2/2021 822 822
MW-19 20210707 7/7/2021 < 20 10 DUP-1-20210707 7/7/2021 795 795
MW-19 20210803 8/3/2021 < 20 10 MW-38 20210707 7/7/2021 780 780
MW-19 20211001 10/1/2021 < 20 10 MW-07 20210916 9/16/2021 778 778
MW-19 20220105 1/5/2022 < 20 10 MW-71 20210805 8/5/2021 746 746
MW-29 20210805 8/5/2021 < 20 10 MW-38 20210506 5/6/2021 743 743
NC009000_GW DATA-GENERIC RPA_Part 3, data
- 3 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
5 6
Use"PASTE SPECIAL Use"PASTE SPECIAL
1,2,3-Trichlorobenzene
Values"then"COPY". Values"then"COPY".
Maximum data points 1,2,4-Trichlorobenzene Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 400 200 Std Dev. 35.0948 MW-19 20220406 4/6/2022 < 400 200 Std Dev. 35.2273
MW-19 20220601 6/1/2022 < 250 125 Mean 35.6034 MW-19 20220601 6/1/2022 < 250 125 Mean 35.3879
MW-19 20210831 8/31/2021 < 200 100 C.V. 0.9857 MW-19 20210831 8/31/2021 < 200 100 C.V. 0.9955
MW-19 20220201 2/1/2022 < 200 100 n 58 MW-19 20220201 2/1/2022 < 200 100 n 58
MW-19 20220301 3/1/2022 < 200 100 MW-19 20220301 3/1/2022 < 200 100
MW-19 20220504 5/4/2022 < 200 100 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 200 100 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 100 50 Max. Value 200.0 pg/L MW-19_20210405 4/5/2021 < 100 50 Max. Value 200.0 pg/L
MW-19_20210504 5/4/2021 < 100 50 Max. Pred Cw 200.0 pg/L MW-19_20210504 5/4/2021 < 100 50 Max. Pred Cw 200.0 pg/L
MW-19 20211102 11/2/2021 < 100 50 MW-19 20211102 11/2/2021 < 100 50
DUP-2-20211102 11/2/2021 < 100 50 DUP-2-20211102 11/2/2021 < 100 50
MW-19 20211201 12/1/2021 < 100 50 MW-19 20211201 12/1/2021 < 100 50
MW-48 20220408 4/8/2022 < 100 50 MW-48 20220408 4/8/2022 < 100 50
DUP-1-202204408 4/8/2022 < 100 50 DUP-1-202204408 4/8/2022 < 100 50
MW-48 20220506 5/6/2022 < 100 50 MW-48 20220506 5/6/2022 < 100 50
MW-48 20220603 6/3/2022 < 100 50 MW-48 20220603 6/3/2022 < 100 50
MW-50 20210106 1/6/2021 < 100 50 MW-50 20210106 1/6/2021 < 100 50
MW-52 20220407 4/7/2022 < 100 50 MW-52 20220407 4/7/2022 < 100 50
MW-52 20220506 5/6/2022 < 100 50 MW-52 20220506 5/6/2022 < 100 50
MW-11 20201020 10/20/2020 < 80 40 MW-11 20201020 10/20/2020 < 80 40
MW-19 20210707 7/7/2021 < 80 40 MW-19_20210707 7/7/2021 < 80 40
MW-19 20210803 8/3/2021 < 80 40 MW-19_20210803 8/3/2021 < 80 40
MW-19 20220105 1/5/2022 < 80 40 MW-19_20220105 1/5/2022 < 80 40
MW-29 20210805 8/5/2021 < 80 40 MW-29_20210805 8/5/2021 < 80 40
MW-29 20210902 9/2/2021 < 80 40 MW-29_20210902 9/2/2021 < 80 40
MW-19 20210602 6/2/2021 < 50 25 MW-19_20210602 6/2/2021 < 50 25
MW-29 20210709 7/9/2021 < 50 25 MW-29_20210709 7/9/2021 < 50 25
DUP-2-20210709 7/9/2021 < 50 25 DUP-2-20210709 7/9/2021 < 50 25
MW-40 20210106 01/06/2021 < 50 25 MW-40 20210106 01/06/2021 < 50 25
MW-50 20220531 5/31/2022 < 50 25 MW-50 20220531 5/31/2022 < 50 25
MW-55 20201023 10/23/2020 < 50 25 MW-55 20201023 10/23/2020 < 50 25
MW-19 20210308 3/8/2021 < 40 20 MW-19 20210308 3/8/2021 < 40 20
MW-19 20211001 10/1/2021 < 40 20 MW-29 20210603 6/3/2021 < 40 20
MW-29 20210603 6/3/2021 < 40 20 MW-50 20201202 12/02/2020 < 40 20
MW-50 20201202 12/02/2020 < 40 20 MW-52 20220303 3/3/2022 < 40 20
MW-52 20220303 3/3/2022 < 40 20 MW-21 20210603 6/3/2021 < 25 12.5
MW-21 20210603 6/3/2021 < 25 12.5 MW-21 20210707 7/7/2021 < 25 12.5
MW-21 20210707 7/7/2021 < 25 12.5 DUP-1-20210707 7/7/2021 < 25 12.5
DUP-1-20210707 7/7/2021 < 25 12.5 MW-38 20210902 9/2/2021 < 25 12.5
MW-38 20210902 9/2/2021 < 25 12.5 MW-41_20220505 5/5/2022 < 25 12.5
MW-41 20220505 5/5/2022 < 25 12.5 MW-50_20201020 10/20/2020 < 25 12.5
MW-50 20201020 10/20/2020 < 25 12.5 MW-55_20220603 6/3/2022 < 25 12.5
MW-52 20210929 9/29/2021 < 25 12.5 MW-19 20211001 10/1/2021 < 20 10
MW-55 20220603 6/3/2022 < 25 12.5 MW-21 20210210 2/10/2021 < 20 10
MW-21 20210210 2/10/2021 < 20 10 MW-21 20210308 3/8/2021 < 20 10
MW-21 20210308 3/8/2021 < 20 10 MW-25 20220105 1/5/2022 < 20 10
MW-25 20220105 1/5/2022 < 20 10 MW-29 20210507 5/7/2021 < 20 10
MW-29 20210507 5/7/2021 < 20 10 MW-38 20210506 5/6/2021 < 20 10
MW-38 20210506 5/6/2021 < 20 10 MW-38 20210603 6/3/2021 < 20 10
MW-38 20210603 6/3/2021 < 20 10 MW-38 20210707 7/7/2021 < 20 10
MW-38 20210707 7/7/2021 < 20 10 MW-38 20210804 8/4/2021 < 20 10
MW-38 20210804 8/4/2021 < 20 10 MW-39 20200916 09/16/2020 < 20 10
MW-39 20200916 09/16/2020 < 20 10 MW-50 20210212 2/12/2021 < 20 10
MW-50 20210212 2/12/2021 < 20 10 MW-50 20210503 5/3/2021 < 20 10
MW-50 20210503 5/3/2021 < 20 10 MW-50 20211130 11/30/2021 < 20 10
MW-50 20211130 11/30/2021 < 20 10 DUP-2-20211130 11/30/2021 < 20 10
DUP-2-20211130 11/30/2021 < 20 10 MW-50 20220103 1/3/2022 < 20 10
MW-50 20220103 1/3/2022 < 20 10 MW-50_20220131 1/31/2022 < 20 10
MW-50 20220131 1/31/2022 < 20 10 MW-50 20220228 2/28/2022 < 20 10
NC009000_GW DATA—GENERIC RPA_Part 3, data
-4 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
7 8
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
1,1,1-Trichloroethane Maximum data points 1,1,2-Trichloroethane Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 < 50 25 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 < 50 25
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20211102 11/2/2021 < 25 12.5
DUP-2-20211102 11/2/2021 < 25 12.5 DUP-2-20211102 11/2/2021 < 25 12.5
MW-19 20211201 12/1/2021 < 25 12.5 MW-19_20211201 12/1/2021 < 25 12.5
MW-48 20220408 4/8/2022 < 25 12.5 MW-48_20220408 4/8/2022 < 25 12.5
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 < 25 12.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-48 20220506 5/6/2022 < 25 12.5
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220603 6/3/2022 < 25 12.5
MW-50 20210106 1/6/2021 < 25 12.5 MW-50 20210106 1/6/2021 < 25 12.5
MW-52 20220407 4/7/2022 < 25 12.5 MW-52 20220407 4/7/2022 < 25 12.5
MW-52 20220506 5/6/2022 < 25 12.5 MW-52 20220506 5/6/2022 < 25 12.5
MW-11 20201020 10/20/2020 < 20 10 MW-11 20201020 10/20/2020 < 20 10
MW-19 20210707 7/7/2021 < 20 10 MW-19 20210707 7/7/2021 < 20 10
MW-19 20210803 8/3/2021 < 20 10 MW-19 20210803 8/3/2021 < 20 10
MW-19 20211001 10/1/2021 < 20 10 MW-19 20211001 10/1/2021 < 20 10
MW-19 20220105 1/5/2022 < 20 10 MW-19 20220105 1/5/2022 < 20 10
MW-29 20210805 8/5/2021 < 20 10 MW-29 20210805 8/5/2021 < 20 10
MW-29 20210902 9/2/2021 < 20 10 MW-29 20210902 9/2/2021 < 20 10
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 < 12.5 6.25
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-29 20210709 7/9/2021 < 12.5 6.25
DUP-2-20210709 7/9/2021 < 12.5 6.25 DUP-2-20210709 7/9/2021 < 12.5 6.25
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-40 20210106 01/06/2021 < 12.5 6.25
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 < 12.5 6.25
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-55 20201023 10/23/2020 < 12.5 6.25
MW-52 20210929 9/29/2021 < 12 6 MW-52 20210929 9/29/2021 < 12 6
MW-19 20210308 3/8/2021 < 10 5 MW-19 20210308 3/8/2021 < 10 5
MW-29 20210603 6/3/2021 < 10 5 MW-29 20210603 6/3/2021 < 10 5
MW-50 20201202 12/02/2020 < 10 5 MW-50 20201202 12/02/2020 < 10 5
MW-52 20220303 3/3/2022 < 10 5 MW-52 20220303 3/3/2022 < 10 5
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-21 20210603 6/3/2021 < 6.2 3.1
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-21 20210707 7/7/2021 < 6.2 3.1
DUP-1-20210707 7/7/2021 < 6.2 3.1 DUP-1-20210707 7/7/2021 < 6.2 3.1
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-38 20210902 9/2/2021 < 6.2 3.1
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-41 20220505 5/5/2022 < 6.2 3.1
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-50 20201020 10/20/2020 < 6.2 3.1
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-55 20220603 6/3/2022 < 6.2 3.1
MW-21 20210210 2/10/2021 < 5 2.5 MW-21 20210210 2/10/2021 < 5 2.5
MW-21 20210308 3/8/2021 < 5 2.5 MW-21 20210308 3/8/2021 < 5 2.5
MW-21 20211001 10/1/2021 < 5 2.5 MW-21 20211001 10/1/2021 < 5 2.5
MW-25 20220105 1/5/2022 < 5 2.5 MW-25 20220105 1/5/2022 < 5 2.5
MW-29 20210507 5/7/2021 < 5 2.5 MW-29 20210507 5/7/2021 < 5 2.5
MW-38 20210506 5/6/2021 < 5 2.5 MW-38 20210506 5/6/2021 < 5 2.5
MW-38 20210603 6/3/2021 < 5 2.5 MW-38 20210603 6/3/2021 < 5 2.5
MW-38 20210707 7/7/2021 < 5 2.5 MW-38 20210707 7/7/2021 < 5 2.5
MW-38 20210804 8/4/2021 < 5 2.5 MW-38 20210804 8/4/2021 < 5 2.5
MW-39 20200916 09/16/2020 < 5 2.5 MW-39 20200916 09/16/2020 < 5 2.5
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210212 2/12/2021 < 5 2.5
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20210503 5/3/2021 < 5 2.5
MW-50 20211130 11/30/2021 < 5 2.5 MW-50 20211130 11/30/2021 < 5 2.5
DUP-2-20211130 11/30/2021 < 5 2.5 DUP-2-20211130 11/30/2021 < 5 2.5
MW-50 20220103 1/3/2022 < 5 2.5 1 MW-50 20220103 1/3/2022 < 5 2.5
NC009000_GW DATA-GENERIC RPA_Part 3, data
- 5- 8/25/2022

REASONABLE POTENTIAL ANALYSIS
9 10
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
Trichloroethene Maximum data points Trichlorofluoromethane (Freon 11) Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-43 20210929 9/29/2021 0.24 0.24 Std Dev. 8.7703 MW-43 20210902 9/2/2021 0.77 0.77 Std Dev. 20.01
MW-19 20220406 4/6/2022 < 100 50 Mean 8.9947 MW-43 20220302 3/2/2022 0.68 0.68 Mean 13.76
MW-19 20220601 6/1/2022 < 62.5 31.25 C.V. 0.9751 MW-43 20220408 4/8/2022 0.66 0.66 C.V. 1.4544
MW-19 20210831 8/31/2021 < 50 25 n 58 MW-43 20211202 12/2/2021 0.64 0.64 n 58
MW-19 20220201 2/1/2022 < 50 25 MW-43 20210929 9/29/2021 0.63 0.63
MW-19 20220301 3/1/2022 < 50 25 Mult Factor= 1.00 MW-43 20220506 5/6/2022 0.62 0.62 Mult Factor= 1.0000
MW-19_20220504 5/4/2022 < 50 25 Max. Value 50.0 Ng/L MW-43_20220602 6/2/2022 0.62 0.62 Max. Value 100.0 pg/L
MW-19_20210405 4/5/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-43_20210805 8/5/2021 0.58 0.58 Max. Pred Cw 100.0 pg/L
MW-19 20210504 5/4/2021 < 25 12.5 MW-36 20220602 6/2/2022 0.57 0.57
MW-19 20211102 11/2/2021 < 25 12.5 MW-43 20210507 5/7/2021 0.55 0.55
DUP-2-20211102 11/2/2021 < 25 12.5 MW-43 20220203 2/3/2022 0.54 0.54
MW-19 20211201 12/1/2021 < 25 12.5 MW-36_20220407 4/7/2022 0.52 0.52
MW-48 20220408 4/8/2022 < 25 12.5 MW-95_20211104 11/4/2021 0.51 0.51
DUP-1-202204408 4/8/2022 < 25 12.5 MW-36 20220505 5/5/2022 0.5 0.5
MW-48 20220506 5/6/2022 < 25 12.5 MW-43 20210603 6/3/2021 0.48 0.48
MW-48 20220603 6/3/2022 < 25 12.5 MW-36 20211203 12/3/2021 0.47 0.47
MW-50 20210106 1/6/2021 < 25 12.5 MW-43 20211103 11/3/2021 0.47 0.47
MW-52 20220407 4/7/2022 < 25 12.5 MW-43 20210708 7/8/2021 0.46 0.46
MW-52 20220506 5/6/2022 < 25 12.5 MW-36 20211104 11/4/2021 0.4 0.4
MW-1 120201020 10/20/2020 < 20 10 DUP-2-20210902 9/2/2021 0.39 0.39
MW-19 20210707 7/7/2021 < 20 10 MW-36_20210902 9/2/2021 0.38 0.38
MW-19 20210803 8/3/2021 < 20 10 MW-98D_20220405 4/5/2022 0.37 0.37
MW-19 20211001 10/1/2021 < 20 10 MW-98D_20220503 5/3/2022 0.37 0.37
MW-19 20220105 1/5/2022 < 20 10 MW-79D_20210602 6/2/2021 0.36 0.36
MW-29 20210805 8/5/2021 < 20 10 MW-98D 20220601 6/1/2022 0.36 0.36
MW-29 20210902 9/2/2021 < 20 10 MW-95 20211001 10/1/2021 0.35 0.35
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-36 20220202 2/2/2022 0.34 0.34
MW-29 20210709 7/9/2021 < 12.5 6.25 MW-36 20210603 6/3/2021 0.33 0.33
DUP-2-20210709 7/9/2021 < 12.5 6.25 MW-79D 20210505 5/5/2021 0.33 0.33
MW-40 20210106 01/06/2021 < 12.5 6.25 DUP-2-20211104 11/4/2021 0.32 0.32
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-95 20220602 6/2/2022 0.31 0.31
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-36 20210708 7/8/2021 0.3 0.3
MW-52 20210929 9/29/2021 < 12 6 MW-36 20210928 9/28/2021 0.27 0.27
MW-19 20210308 3/8/2021 < 10 5 MW-34 20210928 9/28/2021 0.19 0.19
MW-29 20210603 6/3/2021 < 10 5 MW-19 20220406 4/6/2022 < 200 100
MW-50 20201202 12/02/2020 < 10 5 MW-19 20220601 6/1/2022 < 125 62.5
MW-52 20220303 3/3/2022 < 10 5 MW-19 20210831 8/31/2021 < 100 50
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-19 20220201 2/1/2022 < 100 50
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-19 20220301 3/1/2022 < 100 50
DUP-1-20210707 7/7/2021 < 6.2 3.1 MW-19 20220504 5/4/2022 < 100 50
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-19 20210405 4/5/2021 < 50 25
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-19 20210504 5/4/2021 < 50 25
MW-50 20201020 10/20/2020 < 6.2 3.1 MW-19 20211102 11/2/2021 < 50 25
MW-55 20220603 6/3/2022 < 6.2 3.1 DUP-2-20211102 11/2/2021 < 50 25
MW-21 20210210 2/10/2021 < 5 2.5 MW-19 20211201 12/1/2021 < 50 25
MW-21 20210308 3/8/2021 < 5 2.5 MW-48 20220408 4/8/2022 < 50 25
MW-21 20211001 10/1/2021 < 5 2.5 DUP-1-202204408 4/8/2022 < 50 25
MW-25 20220105 1/5/2022 < 5 2.5 MW-48 20220506 5/6/2022 < 50 25
MW-29 20210507 5/7/2021 < 5 2.5 MW-48 20220603 6/3/2022 < 50 25
MW-38 20210506 5/6/2021 < 5 2.5 MW-50 20210106 1/6/2021 < 50 25
MW-38 20210603 6/3/2021 < 5 2.5 MW-52 20220407 4/7/2022 < 50 25
MW-38 20210707 7/7/2021 < 5 2.5 MW-52 20220506 5/6/2022 < 50 25
MW-38 20210804 8/4/2021 < 5 2.5 MW-11 20201020 10/20/2020 < 40 20
MW-39 20200916 09/16/2020 < 5 2.5 MW-19 20210707 7/7/2021 < 40 20
MW-50 20210212 2/12/2021 < 5 2.5 MW-19 20210803 8/3/2021 < 40 20
MW-50 20210503 5/3/2021 < 5 2.5 MW-19 20220105 1/5/2022 < 40 20
MW-50 20211130 11/30/2021 < 5 2.5 MW-29 20210805 8/5/2021 < 40 20
DUP-2-20211130 11/30/2021 < 5 2.5 MW-29 20210902 9/2/2021 < 40 20
NC009000_GW DATA-GENERIC RPA_Part 3, data
- 6 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
11 12
Use"PASTE SPECIAL Use"PASTE SPECIAL
Values"then"COPY". Values"then"COPY".
1,2,3-Trichloropropane (1,2,3-TCP) Maximum data points 1,2,4-Trimethylbenzene Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220406 4/6/2022 < 100 50 Std Dev. 8.7357 MW-55 20220603 6/3/2022 1380 1380 Std Dev. 262.3810
MW-19 20220601 6/1/2022 < 62.5 31.25 Mean 9.0336 MW-19 20220601 6/1/2022 956 956 Mean 293.6483
MW-19 20210831 8/31/2021 < 50 25 C.V. 0.9670 MW-19 20220406 4/6/2022 944 944 C.V. 0.8935
MW-19 20220201 2/1/2022 < 50 25 n 58 MW-19 20220201 2/1/2022 884 884 n 58
MW-19 20220301 3/1/2022 < 50 25 MW-19 20220301 3/1/2022 800 800
MW-19 20220504 5/4/2022 < 50 25 Mult Factor= 1.0000 MW-19 20220504 5/4/2022 773 773 Mult Factor= 1.0000
MW-19_20210405 4/5/2021 < 25 12.5 Max. Value 50.0 pg/L MW-55_20201023 10/23/2020 626 626 Max. Value 1380.0 Ng/L
MW-19_20210504 5/4/2021 < 25 12.5 Max. Pred Cw 50.0 pg/L MW-19_20211201 12/1/2021 557 557 Max. Pred Cw 1380.0 pg/L
MW-19 20211102 11/2/2021 < 25 12.5 MW-19 20210831 8/31/2021 471 471
DUP-2-20211102 11/2/2021 < 25 12.5 MW-50 20210106 1/6/2021 450 450
MW-19 20211201 12/1/2021 < 25 12.5 MW-48 20220506 5/6/2022 415 415
MW-48 20220408 4/8/2022 < 25 12.5 MW-40 20210106 01/06/2021 355 355
DUP-1-202204408 4/8/2022 < 25 12.5 DUP-1-202204408 4/8/2022 338 338
MW-48 20220506 5/6/2022 < 25 12.5 DUP-2-20211102 11/2/2021 322 322
MW-48 20220603 6/3/2022 < 25 12.5 MW-48 20220408 4/8/2022 319 319
MW-50 20210106 1/6/2021 < 25 12.5 MW-19 20211102 11/2/2021 305 305
MW-52 20220407 4/7/2022 < 25 12.5 MW-19 20210405 4/5/2021 297 297
MW-52 20220506 5/6/2022 < 25 12.5 MW-19 20210707 7/7/2021 289 289
MW-11 20201020 10/20/2020 < 20 10 MW-19 20210803 8/3/2021 283 283
MW-19 20210707 7/7/2021 < 20 10 MW-19 20220105 1/5/2022 275 275
MW-19 20210803 8/3/2021 < 20 10 MW-50 20201202 12/02/2020 270 270
MW-19 20211001 10/1/2021 < 20 10 MW-11 20201020 10/20/2020 265 265
MW-19 20220105 1/5/2022 < 20 10 MW-19 20210504 5/4/2021 256 256
MW-29 20210805 8/5/2021 < 20 10 MW-52 20220506 5/6/2022 235 235
MW-29 20210902 9/2/2021 < 20 10 MW-19 20211001 10/1/2021 230 230
MW-19 20210602 6/2/2021 < 12.5 6.25 MW-19 20210602 6/2/2021 224 224
MW-29 20210709 7/9/2021 < 12.5 6.25 DUP-2-20220603 6/3/2022 202 202
DUP-2-20210709 7/9/2021 < 12.5 6.25 MW-61 20220603 6/3/2022 195 195
MW-40 20210106 01/06/2021 < 12.5 6.25 MW-61 20220506 5/6/2022 184 184
MW-50 20220531 5/31/2022 < 12.5 6.25 MW-50 20220531 5/31/2022 182 182
MW-55 20201023 10/23/2020 < 12.5 6.25 MW-48 20220603 6/3/2022 173 173
MW-52 20210929 9/29/2021 < 12 6 MW-50 20210503 5/3/2021 171 171
MW-19 20210308 3/8/2021 < 10 5 MW-29 20210805 8/5/2021 167 167
MW-29 20210603 6/3/2021 < 10 5 MW-41 20220505 5/5/2022 165 165
MW-50 20201202 12/02/2020 < 10 5 MW-38 20210902 9/2/2021 163 163
MW-52 20220303 3/3/2022 < 10 5 MW-41 R_20220603 6/3/2022 162 162
MW-21 20210603 6/3/2021 < 6.2 3.1 MW-29 20210902 9/2/2021 158 158
MW-21 20210707 7/7/2021 < 6.2 3.1 MW-72R 20220408 4/8/2022 150 150
DUP-1-20210707 7/7/2021 < 6.2 3.1 MW-72R 20220506 5/6/2022 149 149
MW-38 20210902 9/2/2021 < 6.2 3.1 MW-19 20210308 3/8/2021 148 148
MW-41 20220505 5/5/2022 < 6.2 3.1 MW-50 20211130 11/30/2021 147 147
MW-50 20201020 10/20/2020 < 6.2 3.1 DUP-2-20211130 11/30/2021 140 140
MW-55 20220603 6/3/2022 < 6.2 3.1 MW-50_20220131 1/31/2022 140 140
MW-21 20210210 2/10/2021 < 5 2.5 DUP-2-20210709 7/9/2021 137 137
MW-21 20210308 3/8/2021 < 5 2.5 MW-29 20210709 7/9/2021 133 133
MW-21 20211001 10/1/2021 < 5 2.5 MW-50 20220103 1/3/2022 131 131
MW-25 20220105 1/5/2022 < 5 2.5 MW-50 20210212 2/12/2021 127 127
MW-29 20210507 5/7/2021 < 5 2.5 MW-50 20210706 7/6/2021 126 126
MW-38 20210506 5/6/2021 < 5 2.5 MW-50 20210312 3/12/2021 125 125
MW-38 20210603 6/3/2021 < 5 2.5 MW-25R 20220603 6/3/2022 121 121
MW-38 20210707 7/7/2021 < 5 2.5 MW-50 20220228 2/28/2022 120 120
MW-38 20210804 8/4/2021 < 5 2.5 DUP-1-20210707 7/7/2021 106 106
MW-39 20200916 09/16/2020 < 5 2.5 MW-50 20220502 5/2/2022 104 104
MW-50 20210212 2/12/2021 < 5 2.5 MW-50 20210601 6/1/2021 103 103
MW-50 20210503 5/3/2021 < 5 2.5 MW-50 20220404 4/4/2022 100 100
MW-50 20211130 11/30/2021 < 5 2.5 MW-38 20210707 7/7/2021 99.9 99.9
DUP-2-20211130 11/30/2021 < 5 2.5 MW-25R 20220408 4/8/2022 94.5 94.5
MW-50 20220103 1/3/2022 < 5 2.5 MW-50 20201020 10/20/2020 89.2 89.2
NC009000_GW DATA-GENERIC RPA_Part 3, data
- 7 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
13 14
Use"PASTE SPECIAL Use"PASTE SPECIAL
1,3,5-Tri methyl benzene
Values"then"COPY". Values"then"COPY".
Maximum data points Vinyl chloride Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-55 20220603 6/3/2022 382 382 Std Dev. 75.1092 MW-79D_20211001 10/1/2021 0.22 0.22 Std Dev. 17.6226
MW-19 20220406 4/6/2022 235 235 Mean 66.3052 MW-19_20220406 4/6/2022 < 200 100 Mean 17.7150
MW-19 20220601 6/1/2022 218 218 C.V. 1.1328 MW-19_20220601 6/1/2022 < 125 62.5 C.V. 0.9948
MW-19 20220201 2/1/2022 215 215 n 58 MW-19_20210831 8/31/2021 < 100 50 n 58
MW-19 20220301 3/1/2022 207 207 MW-19_20220201 2/1/2022 < 100 50
MW-19 20220504 5/4/2022 193 193 Mult Factor= 1.0000 MW-19_20220301 3/1/2022 < 100 50 Mult Factor= 1.0000
MW-48_20220506 5/6/2022 169 169 Max. Value 382.0 pg/L MW-19_20220504 5/4/2022 < 100 50 Max. Value 100.0 pg/L
MW-19_20211201 12/1/2021 156 156 Max. Pred Cw 382.0 Ng/L MW-19_20210405 4/5/2021 < 50 25 Max. Pred Cw 100.0 pg/L
MW-52 20220506 5/6/2022 148 148 MW-19 20210504 5/4/2021 < 50 25
DUP-1-202204408 4/8/2022 141 141 MW-19 20211102 11/2/2021 < 50 25
MW-48 20220408 4/8/2022 134 134 DUP-2-20211102 11/2/2021 < 50 25
MW-19 20210831 8/31/2021 104 104 MW-19_20211201 12/1/2021 < 50 25
MW-61 20220603 6/3/2022 92.7 92.7 MW-48_20220408 4/8/2022 < 50 25
DUP-2-20211102 11/2/2021 90 90 DUP-1-202204408 4/8/2022 < 50 25
MW-48 20220603 6/3/2022 88.3 88.3 MW-48_20220506 5/6/2022 < 50 25
MW-52 20220407 4/7/2022 75.5 75.5 MW-48_20220603 6/3/2022 < 50 25
MW-19 20210707 7/7/2021 68.9 68.9 MW-50_20210106 1/6/2021 < 50 25
DUP-2-20220603 6/3/2022 68.1 68.1 MW-52 20220407 4/7/2022 < 50 25
MW-19 20211001 10/1/2021 66 66 MW-52 20220506 5/6/2022 < 50 25
MW-61 20220506 5/6/2022 60.1 60.1 MW-11 20201020 10/20/2020 < 40 20
MW-41 R_20220603 6/3/2022 57.9 57.9 MW-19 20210707 7/7/2021 < 40 20
MW-72R 20220408 4/8/2022 53.9 53.9 MW-19 20210803 8/3/2021 < 40 20
MW-41 20220505 5/5/2022 49.5 49.5 MW-19 20220105 1/5/2022 < 40 20
MW-50 20220531 5/31/2022 49.3 49.3 MW-29 20210805 8/5/2021 < 40 20
MW-72R 20220506 5/6/2022 48.2 48.2 MW-29 20210902 9/2/2021 < 40 20
MW-25R 20220603 6/3/2022 42.8 42.8 MW-19 20210602 6/2/2021 < 25 12.5
MW-50 20220131 1/31/2022 38.8 38.8 MW-29 20210709 7/9/2021 < 25 12.5
MW-61 20220408 4/8/2022 38 38 DUP-2-20210709 7/9/2021 < 25 12.5
MW-50 20220103 1/3/2022 34.6 34.6 MW-40_20210106 01/06/2021 < 25 12.5
MW-50 20220228 2/28/2022 33 33 MW-50_20220531 5/31/2022 < 25 12.5
MW-50 20210706 7/6/2021 32.5 32.5 MW-55 20201023 10/23/2020 < 25 12.5
MW-25R 20220408 4/8/2022 28.7 28.7 MW-19_20210308 3/8/2021 < 20 10
MW-50 20220502 5/2/2022 27.9 27.9 MW-19_20211001 10/1/2021 < 20 10
DUP-1-20210707 7/7/2021 27.6 27.6 MW-29 20210603 6/3/2021 < 20 10
MW-50 20220404 4/4/2022 27.6 27.6 MW-50 20201202 12/02/2020 < 20 10
MW-25R 20220506 5/6/2022 26.9 26.9 MW-52_20220303 3/3/2022 < 20 10
MW-25 20220105 1/5/2022 26.3 26.3 MW-21_20210603 6/3/2021 < 12.5 6.25
MW-52 20220303 3/3/2022 26.2 26.2 MW-21_20210707 7/7/2021 < 12.5 6.25
MW-38 20210707 7/7/2021 26 26 DUP-1-20210707 7/7/2021 < 12.5 6.25
MW-41 R_20220408 4/8/2022 18.2 18.2 MW-38_20210902 9/2/2021 < 12.5 6.25
MW-07 20210916 9/16/2021 15.3 15.3 MW-41_20220505 5/5/2022 < 12.5 6.25
DUP-1-20211102 11/2/2021 14.4 14.4 MW-50 20201020 10/20/2020 < 12.5 6.25
MW-38 20210804 8/4/2021 13.8 13.8 MW-55_20220603 6/3/2022 < 12.5 6.25
MW-50 20211102 11/2/2021 13.8 13.8 MW-52_20210929 9/29/2021 < 12 6
MW-52 20220203 2/3/2022 13.5 13.5 MW-21_20210308 3/8/2021 < 10 5
MW-87 20220504 5/4/2022 12.8 12.8 MW-23_20210210 2/10/2021 < 10 5
MW-19 20210405 4/5/2021 < 25 12.5 MW-25_20220105 1/5/2022 < 10 5
MW-19 20210504 5/4/2021 < 25 12.5 MW-29_20210507 5/7/2021 < 10 5
MW-19 20211102 11/2/2021 < 25 12.5 MW-38_20210506 5/6/2021 < 10 5
MW-50 20210106 1/6/2021 < 25 12.5 MW-38_20210603 6/3/2021 < 10 5
MW-07 20210928 9/28/2021 12 12 MW-38_20210707 7/7/2021 < 10 5
MW-03 20220302 3/2/2022 11.5 11.5 MW-38_20210804 8/4/2021 < 10 5
MW-52 20211203 12/3/2021 11.5 11.5 MW-39 20200916 09/16/2020 < 10 5
MW-72R 20220603 6/3/2022 11.4 11.4 MW-50_20210212 2/12/2021 < 10 5
MW-52 20210902 9/2/2021 10.2 10.2 MW-50_20210503 5/3/2021 < 10 5
M W-11_20201020 10/20/2020 < 20 10 M W-50_20211130 11/30/2021 < 10 5
MW-19 20210803 8/3/2021 < 20 10 DUP-2-20211130 11/30/2021 < 10 5
MW-19 20220105 1/5/2022 < 20 10 MW-50 20220103 1/3/2022 < 10 5
NC009000 GW DATA GENERIC RPA Part 3, data
- 8 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
15 16
Use"PASTE SPECIAL Use"PASTE SPECIAL
Xylene (Total) Values"then"COPY". m&p-Xylene Values"then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220601 6/1/2022 10700 10700 Std Dev. 2379.3280 MW-19_20220601 6/1/2022 7050 7050 Std Dev. 1509.6991
MW-19 20220406 4/6/2022 9730 9730 Mean 2641.5690 MW-19_20220406 4/6/2022 6500 6500 Mean 1760.6897
MW-19 20220301 3/1/2022 8330 8330 C.V. 0.9007 MW-19_20220301 3/1/2022 5450 5450 C.V. 0.8574
MW-19 20220201 2/1/2022 8080 8080 n 58 MW-19_20220201 2/1/2022 5250 5250 n 58
MW-19 20220504 5/4/2022 7860 7860 MW-19_20220504 5/4/2022 5040 5040
MW-19 20211201 12/1/2021 6020 6020 Mult Factor= 1.0000 MW-19_20211201 12/1/2021 3920 3920 Mult Factor= 1.0000
MW-55_20220603 6/3/2022 5840 5840 Max. Value 10700.0 pg/L MW-55_20220603 6/3/2022 3820 3820 Max. Value 7050.0 pg/L
MW-19_20210831 8/31/2021 5130 5130 Max. Pred Cw 10700.0 pg/L MW-19_20210831 8/31/2021 3350 3350 Max. Pred Cw 7050.0 pg/L
MW-52 20220506 5/6/2022 4580 4580 MW-50_20210106 1/6/2021 2460 2460
MW-48 20220506 5/6/2022 4330 4330 DUP-2-20211102 11/2/2021 2430 2430
DUP-2-20211102 11/2/2021 3780 3780 MW-19 20211102 11/2/2021 2390 2390
MW-19 20211102 11/2/2021 3730 3730 MW-52_20220506 5/6/2022 2360 2360
MW-19 20220105 1/5/2022 3590 3590 MW-19_20220105 1/5/2022 2180 2180
DUP-1-202204408 4/8/2022 3550 3550 MW-48 20220506 5/6/2022 2070 2070
MW-48 20220408 4/8/2022 3430 3430 MW-19_20210405 4/5/2021 1980 1980
MW-48 20220603 6/3/2022 3170 3170 MW-19_20210707 7/7/2021 1980 1980
MW-19 20210504 5/4/2021 3060 3060 MW-19_20210803 8/3/2021 1980 1980
MW-19 20210707 7/7/2021 3060 3060 MW-19_20210504 5/4/2021 1970 1970
MW-19 20210405 4/5/2021 3040 3040 MW-50_20201202 12/02/2020 1950 1950
MW-19 20210803 8/3/2021 3040 3040 MW-55_20201023 10/23/2020 1870 1870
MW-19 20211001 10/1/2021 2680 2680 DUP-1-202204408 4/8/2022 1840 1840
MW-19 20210602 6/2/2021 2459 2459 MW-48_20220408 4/8/2022 1790 1790
MW-52 20220407 4/7/2022 2309 2309 MW-19_20211001 10/1/2021 1700 1700
MW-50 20220531 5/31/2022 2215 2215 MW-19_20210602 6/2/2021 1590 1590
MW-38 20210902 9/2/2021 1948 1948 MW-50_20220531 5/31/2022 1370 1370
MW-29 20210902 9/2/2021 1722 1722 MW-48_20220603 6/3/2022 1320 1320
MW-29 20210805 8/5/2021 1639 1639 MW-38_20210902 9/2/2021 1290 1290
MW-50 20210503 5/3/2021 1536 1536 MW-40_20210106 01/06/2021 1280 1280
MW-50 20211130 11/30/2021 1467 1467 MW-29_20210902 9/2/2021 1120 1120
MW-50 20220103 1/3/2022 1413 1413 MW-11_20201020 10/20/2020 1110 1110
DUP-2-20220603 6/3/2022 1404 1404 MW-29 20210805 8/5/2021 1080 1080
MW-29 20210709 7/9/2021 1380 1380 MW-50 20210503 5/3/2021 1010 1010
DUP-2-20211130 11/30/2021 1366 1366 MW-52 20220407 4/7/2022 949 949
MW-50 20220228 2/28/2022 1360 1360 MW-50 20211130 11/30/2021 909 909
DUP-2-20210709 7/9/2021 1310 1310 MW-29 20210709 7/9/2021 901 901
MW-41 20220505 5/5/2022 1304 1304 DUP-2-20210709 7/9/2021 853 853
MW-50 20220131 1/31/2022 1300 1300 MW-50 20220103 1/3/2022 853 853
DUP-1-20210707 7/7/2021 1256 1256 MW-19 20210308 3/8/2021 838 838
MW-61 20220603 6/3/2022 1245 1245 DUP-2-20211130 11/30/2021 835 835
MW-50 20220502 5/2/2022 1241 1241 DUP-1-20210707 7/7/2021 829 829
MW-38 20210707 7/7/2021 1225 1225 DUP-2-20220603 6/3/2022 824 824
MW-50 20220404 4/4/2022 1176 1176 MW-41_20220505 5/5/2022 814 814
MW-50 20210312 3/12/2021 1149 1149 MW-50_20220228 2/28/2022 812 812
MW-41 R_20220603 6/3/2022 1145 1145 MW-38_20210707 7/7/2021 805 805
MW-25 20220105 1/5/2022 1067 1067 MW-50_20220131 1/31/2022 778 778
MW-54 20210805 8/5/2021 1045 1045 MW-50_20210312 3/12/2021 750 750
MW-50 20210706 7/6/2021 1043 1043 MW-50_20220502 5/2/2022 748 748
MW-38 20210603 6/3/2021 935 935 MW-50_20210212 2/12/2021 713 713
MW-38 20210804 8/4/2021 892 892 MW-50_20220404 4/4/2022 712 712
MW-50 20210406 4/6/2021 885 885 MW-61_20220603 6/3/2022 693 693
MW-50 20210601 6/1/2021 881 881 MW-41R_20220603 6/3/2022 675 675
MW-72R 20220408 4/8/2022 862 862 MW-50_20210706 7/6/2021 662 662
MW-29 20210603 6/3/2021 774 774 MW-25_20220105 1/5/2022 661 661
MW-54 20210604 6/4/2021 751 751 MW-54_20210805 8/5/2021 649 649
MW-38 20210506 5/6/2021 713 713 MW-38_20210603 6/3/2021 615 615
MW-72R 20220506 5/6/2022 703 703 MW-50_20201020 10/20/2020 611 611
MW-52 20220303 3/3/2022 688 688 MW-50_20210601 6/1/2021 568 568
MW-25R 20220603 6/3/2022 673 673 MW-50 20210406 4/6/2021 563 563
NC009000_GW DATA—GENERIC RPA_Part 3, data
- 9- 8/25/2022

REASONABLE POTENTIAL ANALYSIS
17 18
Use"PASTE SPECIAL Use"PASTE SPECIAL-
O-Xylene Values"then"COPY". C5 - C8 Aliphatics Values"then"COPY".
Maximum data points Maximum data points=
=58 58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220601 6/1/2022 3650 3650 Std Dev. 821.5628 MW-19_20220601 6/1/2022 153000 153000 Std Dev. 34045.8159
MW-19 20220406 4/6/2022 3230 3230 Mean 1064.0862 MW-19_20220406 4/6/2022 139000 139000 Mean 36756.8966
MW-19 20220301 3/1/2022 2880 2880 C.V. 0.7721 MW-19_20220504 5/4/2022 136000 136000 C.V. 0.9262
MW-19 20220201 2/1/2022 2830 2830 n 58 MW-19_20220301 3/1/2022 104000 104000 n 58
MW-19 20220504 5/4/2022 2820 2820 MW-52_20220506 5/6/2022 85500 85500
MW-48 20220506 5/6/2022 2260 2260 Mult Factor= 1.0000 MW-19_20210831 8/31/2021 78300 78300 Mult Factor= 1.0000
MW-52_20220506 5/6/2022 2220 2220 Max. Value 3650.0 pg/L MW-19_20220201 2/1/2022 75600 75600 Max. Value 153000.0 pg/L
MW-19_20211201 12/1/2021 2100 2100 Max. Pred Cw 3650.0 pg/L MW-48_20220506 5/6/2022 72400 72400 Max. Pred Cw 153000.0 pg/L
MW-55 20220603 6/3/2022 2020 2020 MW-48_20220603 6/3/2022 64200 64200
MW-48 20220603 6/3/2022 1850 1850 MW-19_20211201 12/1/2021 62000 62000
MW-19 20210831 8/31/2021 1780 1780 DUP-1-202204408 4/8/2022 59400 59400
DUP-1-202204408 4/8/2022 1710 1710 MW-19 20210803 8/3/2021 58900 58900
MW-48 20220408 4/8/2022 1640 1640 MW-48_20220408 4/8/2022 58300 58300
MW-19 20220105 1/5/2022 1410 1410 MW-19_20210707 7/7/2021 58200 58200
MW-52 20220407 4/7/2022 1360 1360 MW-19_20210504 5/4/2021 56000 56000
DUP-2-20211102 11/2/2021 1350 1350 MW-19 20210405 4/5/2021 47300 47300
MW-19 20211102 11/2/2021 1340 1340 MW-19 20220105 1/5/2022 45300 45300
MW-50 20210106 1/6/2021 1230 1230 DUP-2-20211102 11/2/2021 42900 42900
MW-19 20210504 5/4/2021 1090 1090 MW-52_20220407 4/7/2022 42900 42900
MW-19 20210707 7/7/2021 1080 1080 MW-29_20210805 8/5/2021 42800 42800
MW-19 20210405 4/5/2021 1060 1060 MW-19_20211102 11/2/2021 41900 41900
MW-19 20210803 8/3/2021 1060 1060 MW-19_20210602 6/2/2021 38600 38600
MW-19 20211001 10/1/2021 980 980 DUP-2-20210709 7/9/2021 31100 31100
MW-50 20201202 12/02/2020 962 962 MW-29_20210902 9/2/2021 29300 29300
MW-19 20210602 6/2/2021 869 869 MW-29_20210709 7/9/2021 28300 28300
MW-55 20201023 10/23/2020 860 860 MW-50_20210106 1/6/2021 25900 25900
MW-50 20220531 5/31/2022 845 845 MW-50_20220531 5/31/2022 22700 22700
MW-40 20210106 01/06/2021 662 662 MW-03_20220202 2/2/2022 19100 19100
MW-38 20210902 9/2/2021 658 658 MW-50_20220502 5/2/2022 19100 19100
MW-1 120201020 10/20/2020 645 645 MW-29_20210603 6/3/2021 19000 19000
MW-29 20210902 9/2/2021 602 602 MW-50_20201202 12/02/2020 18700 18700
DUP-2-20220603 6/3/2022 580 580 MW-11 20201020 10/20/2020 16700 16700
MW-52 20220303 3/3/2022 561 561 MW-03_20220302 3/2/2022 16100 16100
MW-50 20220103 1/3/2022 560 560 MW-52_20220303 3/3/2022 15900 15900
MW-29 20210805 8/5/2021 559 559 MW-54_20210805 8/5/2021 15900 15900
MW-50 20211130 11/30/2021 558 558 MW-38_20210902 9/2/2021 15600 15600
MW-61 20220603 6/3/2022 552 552 MW-50_20220131 1/31/2022 15300 15300
MW-50 20220228 2/28/2022 548 548 MW-38_20210804 8/4/2021 15200 15200
DUP-2-20211130 11/30/2021 531 531 MW-41 20220505 5/5/2022 15100 15100
MW-50 20210503 5/3/2021 526 526 DUP-1-20210707 7/7/2021 14700 14700
MW-50 20220131 1/31/2022 522 522 MW-50_20220228 2/28/2022 14300 14300
MW-50 20220502 5/2/2022 493 493 MW-50_20210503 5/3/2021 13500 13500
MW-41 20220505 5/5/2022 490 490 MW-38_20210707 7/7/2021 13400 13400
MW-29 20210709 7/9/2021 479 479 MW-50 20220404 4/4/2022 13300 13300
MW-41 R_20220603 6/3/2022 470 470 MW-52_20220203 2/3/2022 13100 13100
MW-19 20210308 3/8/2021 465 465 MW-55_20201023 10/23/2020 13000 13000
MW-50 20220404 4/4/2022 464 464 MW-03_20220107 1/7/2022 12200 12200
DUP-2-20210709 7/9/2021 457 457 MW-40 20210106 01/06/2021 12100 12100
DUP-1-20210707 7/7/2021 427 427 MW-19 20211001 10/1/2021 12000 12000
MW-38 20210707 7/7/2021 420 420 MW-25_20220105 1/5/2022 11600 11600
MW-25 20220105 1/5/2022 406 406 MW-55_20220603 6/3/2022 11600 11600
MW-50 20210312 3/12/2021 399 399 DUP-2-20211130 11/30/2021 11200 11200
MW-54 20210805 8/5/2021 396 396 MW-38_20210603 6/3/2021 11100 11100
MW-50 20210706 7/6/2021 381 381 MW-87_20220504 5/4/2022 11000 11000
MW-52 20211203 12/3/2021 375 375 MW-03_20220407 4/7/2022 10800 10800
MW-50 20210212 2/12/2021 367 367 MW-21 20210603 6/3/2021 10500 10500
MW-72R 20220408 4/8/2022 342 342 MW-50 20211130 11/30/2021 10500 10500
MW-50 20201020 10/20/2020 336 336 MW-50 20220103 1/3/2022 10500 10500
NC009000 GW DATA GENERIC RPA Part 3, data
- 10 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
19 20
Use"PASTE SPECIAL Use"PASTE SPECIAL
C9 - C12 Aliphatics Values"then"COPY". C9 - C10 Aromatics Values"then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20220601 6/1/2022 25800 25800 Std Dev. 5285.1052 MW-19_20220406 4/6/2022 7340 7340 Std Dev. 1241.7965
MW-19 20220406 4/6/2022 25300 25300 Mean 6051.2069 MW-55_20220603 6/3/2022 4390 4390 Mean 1187.1897
MW-19 20220301 3/1/2022 19600 19600 C.V. 0.8734 MW-19 20220601 6/1/2022 4320 4320 C.V. 1.0460
MW-19 20220504 5/4/2022 17700 17700 n 58 MW-19 20220301 3/1/2022 3480 3480 n 58
MW-19 20220201 2/1/2022 13300 13300 MW-19 20220504 5/4/2022 3190 3190
MW-19 20211201 12/1/2021 11800 11800 Mult Factor= 1.0000 MW-19 20220201 2/1/2022 2450 2450 Mult Factor= 1.0000
MW-19_20210831 8/31/2021 11600 11600 Max. Value 25800.0 pg/L MW-48_20220506 5/6/2022 2340 2340 Max. Value 7340.0 pg/L
MW-55_20220603 6/3/2022 10900 10900 Max. Pred Cw 25800.0 Ng/L MW-52_20220506 5/6/2022 1890 1890 Max. Pred Cw 7340.0 pg/L
MW-19 20210504 5/4/2021 8520 8520 DUP-1-202204408 4/8/2022 1880 1880
MW-50 20210106 1/6/2021 8140 8140 MW-48 20220408 4/8/2022 1810 1810
DUP-2-20211102 11/2/2021 8080 8080 MW-55 20201023 10/23/2020 1720 1720
MW-19 20211102 11/2/2021 7720 7720 MW-48 20220603 6/3/2022 1610 1610
MW-19 20210405 4/5/2021 7550 7550 MW-40 20210106 01/06/2021 1430 1430
MW-19 20220105 1/5/2022 7390 7390 MW-19 20211001 10/1/2021 1400 1400
MW-19 20210707 7/7/2021 7250 7250 MW-11 20201020 10/20/2020 1370 1370
MW-52 20220506 5/6/2022 7180 7180 MW-61 20220506 5/6/2022 1340 1340
MW-19 20210803 8/3/2021 7110 7110 MW-19 20210831 8/31/2021 1330 1330
MW-48 20220506 5/6/2022 6930 6930 MW-19 20211201 12/1/2021 < 2500 1250
MW-40 20210106 01/06/2021 6890 6890 MW-41 20220505 5/5/2022 1210 1210
MW-48 20220603 6/3/2022 6480 6480 MW-50 20210106 1/6/2021 1210 1210
DUP-1-202204408 4/8/2022 6360 6360 MW-72R 20220506 5/6/2022 1100 1100
MW-19 20210602 6/2/2021 6190 6190 DUP-2-20211102 11/2/2021 1040 1040
MW-48 20220408 4/8/2022 6090 6090 MW-19 20211102 11/2/2021 1020 1020
MW-50 20201202 12/02/2020 5620 5620 MW-50 20201202 12/02/2020 934 934
MW-52 20220407 4/7/2022 5230 5230 MW-19 20220105 1/5/2022 842 842
MW-11 20201020 10/20/2020 4580 4580 MW-61 20220603 6/3/2022 814 814
MW-29 20210805 8/5/2021 4580 4580 MW-72R 20220408 4/8/2022 790 790
MW-55 20201023 10/23/2020 4580 4580 MW-19 20210405 4/5/2021 744 744
MW-50 20220531 5/31/2022 4310 4310 DUP-2-20220603 6/3/2022 740 740
MW-50 20210503 5/3/2021 4060 4060 MW-41 R_20220603 6/3/2022 705 705
MW-41 20220505 5/5/2022 3980 3980 MW-50 20220531 5/31/2022 657 657
MW-38 20210902 9/2/2021 3890 3890 MW-19 20210602 6/2/2021 652 652
MW-29 20210902 9/2/2021 3360 3360 MW-52 20220407 4/7/2022 < 1250 625
DUP-2-20210709 7/9/2021 3250 3250 MW-61 20220408 4/8/2022 567 567
DUP-1-20210707 7/7/2021 3070 3070 MW-25R 20220603 6/3/2022 546 546
MW-50 20220228 2/28/2022 2970 2970 MW-50 20220228 2/28/2022 523 523
MW-29 20210709 7/9/2021 2870 2870 MW-52 20210929 9/29/2021 510 510
MW-50 20220502 5/2/2022 2870 2870 MW-50 20220502 5/2/2022 504 504
MW-38 20210707 7/7/2021 2840 2840 MW-50 20210212 2/12/2021 < 1000 500
DUP-2-20220603 6/3/2022 2640 2640 MW-19 20210504 5/4/2021 < 1000 500
DUP-2-20211130 11/30/2021 2620 2620 MW-19 20210707 7/7/2021 < 1000 500
MW-38 20210603 6/3/2021 2600 2600 MW-19_20210803 8/3/2021 < 1000 500
MW-41 R_20220603 6/3/2022 2570 2570 MW-29_20210805 8/5/2021 < 1000 500
MW-50 20210706 7/6/2021 2550 2550 MW-50 20210503 5/3/2021 491 491
MW-38 20210804 8/4/2021 2530 2530 MW-19 20210308 3/8/2021 473 473
MW-50 20211130 11/30/2021 2480 2480 MW-50 20220131 1/31/2022 465 465
MW-50 20210312 3/12/2021 2460 2460 MW-25R 20220506 5/6/2022 426 426
MW-50 20210212 2/12/2021 2420 2420 MW-50 20210706 7/6/2021 421 421
MW-25 20220105 1/5/2022 2360 2360 DUP-2-20211130 11/30/2021 418 418
MW-50 20220404 4/4/2022 2350 2350 MW-50 20211130 11/30/2021 404 404
MW-50 20220131 1/31/2022 2340 2340 MW-50 20201020 10/20/2020 398 398
MW-50 20220103 1/3/2022 2240 2240 MW-25R 20220408 4/8/2022 396 396
MW-50 20210601 6/1/2021 2200 2200 MW-38 20210902 9/2/2021 395 395
MW-54 20210805 8/5/2021 2180 2180 MW-50 20220404 4/4/2022 386 386
MW-50 20210406 4/6/2021 2170 2170 MW-41 R_20220408 4/8/2022 366 366
MW-61 20220603 6/3/2022 2120 2120 DUP-1-20210707 7/7/2021 356 356
MW-29 20210603 6/3/2021 2100 2100 MW-52_20220303 3/3/2022 350 350
MW-38 20210506 5/6/2021 2100 2100 MW-50 20210312 3/12/2021 339 339
NC009000 GW DATA GENERIC RPA Part 3, data
- 11 - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
21
Use"PASTE SPECIAL
VPH (Total) values"then"COPY".
Maximum data points
=58
Date Data BDL=1/2DL Results
MW-19 20220601 6/1/2022 183 183 Std Dev. 40.4199
MW-19 20220406 4/6/2022 171 171 Mean 43.0261
MW-19 20220504 5/4/2022 157 157 C.V. 0.9394
MW-19 20220301 3/1/2022 127 127 n 58
MW-52 20220506 5/6/2022 94.5 94.5
MW-19 20220201 2/1/2022 91.4 91.4 Mult Factor= 1.0000
MW-19_20210831 8/31/2021 91.2 91.2 Max. Value 183.0 mg/L
MW-48_20220506 5/6/2022 81.7 81.7 Max. Pred Cw 183.0 mg/L
MW-19 20211201 12/1/2021 75.3 75.3
MW-48 20220603 6/3/2022 72.2 72.2
DUP-1-202204408 4/8/2022 67.6 67.6
MW-19 20210803 8/3/2021 66.9 66.9
MW-19 20210707 7/7/2021 66.3 66.3
MW-48 20220408 4/8/2022 66.2 66.2
MW-19 20210504 5/4/2021 64.5 64.5
MW-19 20210405 4/5/2021 54.854 54.854
MW-19 20220105 1/5/2022 53.5 53.5
DUP-2-20211102 11/2/2021 52 52
MW-19 20211102 11/2/2021 50.6 50.6
MW-52 20220407 4/7/2022 49.3 49.3
MW-29 20210805 8/5/2021 48.1 48.1
MW-19 20210602 6/2/2021 44.8 44.8
MW-50 20210106 1/6/2021 35.3 35.3
DUP-2-20210709 7/9/2021 34.9 34.9
MW-29 20210902 9/2/2021 33.1 33.1
MW-29 20210709 7/9/2021 31.6 31.6
MW-50 20220531 5/31/2022 27.7 27.7
MW-55 20220603 6/3/2022 26.9 26.9
MW-50 20220502 5/2/2022 22.5 22.5
MW-29 20210603 6/3/2021 21.1 21.1
MW-40 20210106 01/06/2021 20.4 20.4
MW-41 20220505 5/5/2022 20.2 20.2
MW-38 20210902 9/2/2021 19.9 19.9
MW-03 20220202 2/2/2022 19.2 19.2
MW-54 20210805 8/5/2021 18.3 18.3
DUP-1-20210707 7/7/2021 18.1 18.1
MW-50 20220131 1/31/2022 18.1 18.1
MW-38 20210804 8/4/2021 17.9 17.9
MW-52 20220303 3/3/2022 17.9 17.9
MW-50 20220228 2/28/2022 17.8 17.8
MW-50 20210503 5/3/2021 17.5 17.5
MW-03 20220302 3/2/2022 16.8 16.8
MW-38 20210707 7/7/2021 16.66 16.66
MW-50 20220404 4/4/2022 16.1 16.1
MW-25 20220105 1/5/2022 14.3 14.3
DUP-2-20211130 11/30/2021 14.3 14.3
MW-52 20220203 2/3/2022 14.1 14.1
MW-38 20210603 6/3/2021 13.7 13.7
MW-50 20211130 11/30/2021 13.4 13.4
MW-87 20220504 5/4/2022 13.1 13.1
MW-50 20220103 1/3/2022 13 13
MW-61 20220506 5/6/2022 12.9 12.9
MW-19 20210308 3/8/2021 12.6 12.6
MW-03 20220107 1/7/2022 12.4 12.4
DUP-2-20220603 6/3/2022 11.4 11.4
MW-03 20220407 4/7/2022 11.2 11.2
MW-21 20210603 6/3/2021 11.2 11.2
MW-38 20210506 5/6/2021 11 11
NC009000_GW DATA-GENERIC RPA_Part 3, data
- 12 - 8/25/2022

Colonial Pipeline Company - 2020-L1-SR2448 REASONABLE POTENTIAL ANALYSIS Outfall 001
NCO090000 2018 Generic RPA - 95% Probability/95% Confidence QW = 0.576 M G D
MAXIMUM DATA POINTS = 58
Qw(MGD) = 0.5760 WWTP/WTP Class: PC-1
1Q10S (cfs) = 0.21 IWC% @ 1Q10S = 80.95756257
7Q10S (cfs) = 0.25 IWC% @ 7Q10S = 78.1239062
7Q10W(cfs) = 0.42 IW%C @ 7Q10W= 68.00731261
30Q2 (cfs) = 0.56 IWC% @ 30Q2 = 61.45374449
Avg. Stream Flow, QA(cfs) = 3.90 IWC% @ QA= 18.62794191
Receiving Stream: North Prong Clark Creek HUC 30401050101 Stream Class: C
PARAMETER NC STANDARDS OR EPA CRITERIA J (n REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION
TYPEAplied Chronic Standa d Acute n #Det. Max Pred Cw Allowable Cw
Acute: NO WQS
1,1,1,2-Tetrachloroethane µg/L 58 0 50.0
Chronic:----------- ---------------------------
NO DETECTS Max MDL = 100 No Detects
Acute: NO WQS
1,1,2,2-Tetrachloroethane C 4 HH(Qavg) µg/L 58 0 50.0
Chronic:
-----21_47--- ---------------------------
NO DETECTS Max MDL = 100 No Detects
Acute: NO WQS
Tetrachloroethene (Tetrachloroethylene) (PERC) C 3.3 HH(Qavg) µg/L 58 34 50.0
Chronic:----- 17.72--- ---------------------------
RPA for non-AL -apply Monthly Monitoring with Limit
6 value(s) >Allowable Cw
Acute: NO WQS
Toluene NC 11 FW(7Q10s) µg/L 58 58 22800.0
Chronic: 14.08 RPA for non-AL -apply Monthly Monitoring with Limit.
Pollutant of concern for petroluem product
58 value(s) >Allowable Cw groundwater contamination.
Acute: NO WQS
1,2,3-Trichlorobenzene µg/L 58 0 200.0
Chronic:----------- ---------------------------
No Detects. No Standards, Criteria, or TBEL.
NO DETECTS Max MDL = 400
Acute: NO WQS
1,2,4-Trichlorobenzene NC 0.076 HH(7Q10s) µg/L 58 0 200.0
Chronic:----- 0.10 --- ---------------------------
NO DETECTS Max MDL 400 No Detects
Acute: NO WQS
1,1,1-Trichloroethane C 2500 FW(7Q10s) µg/L 58 0 50.0
Chronic:----3,200.04-- ---------------------------
NO DETECTS Max MDL = 100 No Detects
Acute: NO WQS
1,1,2-Trichloroethane C 8.9 HH(Qavg) µg/L 58 0 50.0
Chronic:
-----47.78--- ---------------------------
NO DETECTS Max MDL = 100 No Detects
Acute: NO WQS
Trichloroethene C 30 HH(Qavg) µg/L 58 1 50.0
Chronic: 161.05 No RPA, Predicted Max< 50% of Allowbale Cw- No
No value > Allowable Cw Monitoring required
Acute: NO WQS
Trichlorofluoromethane (Freon 11) NC 67000 HH(7Q10s) µg/L 58 34 100.0
Chronic: 85,761.20 No RPA, Predicted Max< 50% of Allowbale Cw- No
No value > Allowable Cw Monitoring required
Acute: NO WQS
1,2,3-Trichloropropane (1,2,3-TCP) C 0.001 HH(Qavg) µg/L 58 0 50.0
Chronic: 0.01 No RPA, Predicted Max< 50% of Allowbale Cw- No
NO DETECTS Max MDL = 100 Monitoring required
Acute: NO WQS
1,2,4-Trimethylbenzene NC 390 FW(7Q10s) µg/L 58 58 1380.0
Chronic:
-----499.21--- ---------------------------
RPA for non-AL -apply Monthly Monitoring with Limit
8 value(s) >Allowable Cw
Acute: NO WQS
1,3,5-Trimethylbenzene NC 215 HH(7Q10s) µg/L 58 51 382.0
Chronic:-----275.20 --1 value(s) >Allowable Cw ---------------------------
RPA for non-AL -apply Monthly Monitoring with Limit
NC009000_GW DATA-GENERIC RPA-Part 3, rpa
Page 13 of 14 8/25/2022

Colonial Pipeline Company — 2020-L1-SR2448 REASONABLE POTENTIAL ANALYSIS Outfall 001
N CO090000 2018 Generic RPA - 95% Probability/95% Confidence QW = 0.576 M G D
Acute: NO WQS
Vinyl chloride C 2.4 HH(Qavg) µg/L 58 1 100.0
Chronic:----- 12.88--- ---------------------------
RPA for non-AL -apply Monthly Monitoring with Limit
24 value(s) >Allowable Cw
Acute: NO WQS
Xylene (Total) NC 670 FW(7Q10s) µg/L 58 58 10700.0
Chronic: 857.61 RPA for non-AL -apply Monthly Monitoring with Limit.
Pollutant of concern for petroluem product
52 value(s) >Allowable Cw groundwater contamination.
Acute: NO WQS
m&p-Xylene NC 420 FW(7QlOs) µg/L 58 58 7050.0
Chronic: 537.61 RPA for non-AL -apply Monthly Monitoring with Limit.
58 value(s) > Allowable Cw Monitor Total Xylene.
Acute: NO WQS
o-Xylene NC 600 FW(7Q10s) µg/L 58 58 3650.0
Chronic: 768.01 RPA for non-AL -apply Monthly Monitoring with Limit.
27 value(s) > Allowable Cw Monitor Total Xylene.
Acute: NO WQS
C5 -C8 Aliphatics NC 180 FW(7Q10s) µg/L 58 58 153000.0
Chronic: 230.40 RPA for non-AL -apply Monthly Monitoring with Limit.
Toxicity exceeds solubility, no visible sheen or free
product in water or on sediment or shoreline per 15A
58 value(s) > Allowable Cw NCAC 02B .0211 & .0220. TBEL for O&G - MA 15
mg/L, DM 20 mg/L.
Acute: NO WQS
C9 -C12 Aliphatics NC 180 FW(7Q10s) µg/L 58 58 25800.0
Chronic: 230.40 RPA for non-AL -apply Monthly Monitoring with Limit.
Toxicity exceeds solubility, no visible sheen or free
product in water or on sediment or shoreline per 15A
58 value(s) > Allowable Cw NCAC 02B .0211 & .0220. TBEL for O&G - MA 15
mg/L, DM 20 mg/L.
Acute: NO WQS
C9 -C10 Aromatics NC 4000 HH(7Q10s) µg/L 58 51 7340.0
Chronic: 5,120.07 RPA for non-AL -apply Monthly Monitoring with Limit.
Toxicity exceeds solubility, no visible sheen or free
product in water or on sediment or shoreline per 15A
1 value(s)>Allowable Cw NCAC 02B .0211 & .0220. TBEL for O&G - MA 15
mg/L, DM 20 mg/L.
Acute: NO WQS
VPH (Total) mg/L 58 58 183.0
Chronic: TBEL for O&G - MA 15 mg/L, DM 20 mg/L.
No value > Allowable Cw
NC009000_GW DATA—GENERIC RPA—Part 3, rpa
Page 14 of 14 8/25/2022

2018 Generic RPA - 95% Probability/95% Confidence
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY MISSING DATA or ENTRY ERROR
Table 1. Project Information Table 2. Parameters of Concern
❑ CHECK IF HQW OR ORW Name Type Chronic Modifier Acute PQL Units
Facility Name Colonial Pipeline Company—2020-L1-SR2448 Par01 n-Butanol mg/L ?DATA?
WWTP/WTP Class PC-1 Par02 Ethanol NC 5000 FW pg/L
NPDES Permit NCO090000 Par03 Ethyl-tert-butyl ether pg/L ?DATA?
Outfall 001 Par04 tert-Amyl Alcohol pg/L ?DATA?
Flow, Qw (MGD) 0.576 Par05 tert-Amylmethyl ether pg/L ?DATA?
Receiving Stream North Prong Clark Creek Par06 tert-Butyl Alcohol pg/L ?DATA?
Stream Class C Par07
HUC Number 30401050101 Par08
7Q10s (cfs) 0.25 Par09
7Q10w (cfs) 0.42 Par10
30Q2 (cfs) 0.56 Par11
QA(cfs) 3.90 Par12
1 Q10s (cfs) 0.21 Par13
Data Source(s) MW data Sep202O_Jun2O22. PQLs are from the Par14
❑ CHECK TO APPLY MODEL NCDENR_DWR_WSS_LAB_PQLs Current
FCHECK TO APPLY MODEL par15
Revision Date - 1/22/2021.
Par16
Par17
Par18
Par19
Par20
Follow directions for data entry. In some cases a
comment menu list the available choices or a Par21
dropdown menu will provide a list you may select Par22
from. Error message occur if data entry does not
meet input criteria.
NC009000_GW DATA—GENERIC RPA_Part 4, input
8/25/2022

REASONABLE POTENTIAL ANALYSIS
1 2
Use"PASTE SPECIAL Use"PASTE SPECIAL
n-Butanol Values"then"COPY". Ethanol Values"then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-1 920210803 8/3/2021 < 5 2.5 Std Dev. 1.0630 MW-19_20210803 8/3/2021 < 8000 4000 Std Dev. 730.3071
MW-21 20210803 8/3/2021 < 5 2.5 Mean 1.8534 MW-29_20210805 8/5/2021 < 8000 4000 Mean 277.5862
MW-23 20210803 8/3/2021 < 5 2.5 C.V. 0.5735 MW-38_20210804 8/4/2021 < 2000 1000 C.V. 2.6309
MW-31 20210803 8/3/2021 < 5 2.5 n 58 MW-54_20210805 8/5/2021 < 2000 1000 n 58
DUP-1-20210803 8/3/2021 < 5 2.5 MW-52 20210805 8/5/2021 < 800 400
MW-42 20210802 8/2/2021 < 5 2.5 Mult Factor= 1.0000 MW-71_20210805 8/5/2021 < 800 400 Mult Factor= 1.0000
MW-45_20210802 8/2/2021 < 5 2.5 Max. Value 2.5 mg/L MW-50_20210803 8/3/2021 < 400 200 Max. Value 4000.0 dig/L
MW-49_20210802 8/2/2021 < 5 2.5 Max. Pred Cw 2.5 mg/L MW-01_20210805 8/5/2021 < 200 100 Max. Pred Cw 4000.0 dig/L
MW-50 20210803 8/3/2021 < 5 2.5 MW-02_20210806 8/6/2021 < 200 100
MW-51 20210802 8/2/2021 < 5 2.5 MW-03_20210805 8/5/2021 < 200 100
DUP-2-20210802 8/2/2021 < 5 2.5 MW-04 20210806 8/6/2021 < 200 100
MW-62 20210802 8/2/2021 < 5 2.5 MW-05_20210806 8/6/2021 < 200 100
MW-64 20210802 8/2/2021 < 5 2.5 MW-06_20210804 8/4/2021 < 200 100
MW-65 20210802 8/2/2021 < 5 2.5 MW-07_20210805 8/5/2021 < 200 100
MW-66 20210802 8/2/2021 < 5 2.5 MW-08_20210803 8/3/2021 < 200 100
MW-67 20210802 8/2/2021 < 5 2.5 MW-09_20210804 8/4/2021 < 200 100
DUP-1 20210802 8/2/2021 < 5 2.5 MW-12 20210806 8/6/2021 < 200 100
MW-68 20210802 8/2/2021 < 5 2.5 MW-13 20210803 8/3/2021 < 200 100
MW-70 20210802 8/2/2021 < 5 2.5 MW-14 20210803 8/3/2021 < 200 100
MW-73 20210802 8/2/2021 < 5 2.5 MW-15 20210806 8/6/2021 < 200 100
MW-74 20210802 8/2/2021 < 5 2.5 MW-16 20210804 8/4/2021 < 200 100
MW-75 20210802 8/2/2021 < 5 2.5 MW-17 20210804 8/4/2021 < 200 100
MW-77 20210803 8/3/2021 < 5 2.5 MW-20 20210804 8/4/2021 < 200 100
MW-78 20210803 8/3/2021 < 5 2.5 MW-21 20210803 8/3/2021 < 200 100
MW-79 20210803 8/3/2021 < 5 2.5 MW-23 20210803 8/3/2021 < 200 100
MW-80 20210803 8/3/2021 < 5 2.5 MW-25 20210804 8/4/2021 < 200 100
MW-81 20210803 8/3/2021 < 5 2.5 MW-27 20210805 8/5/2021 < 200 100
MW-82 20210803 8/3/2021 < 5 2.5 MW-28 20210804 8/4/2021 < 200 100
MW-84 20210803 8/3/2021 < 5 2.5 DUP-1-20210804 8/4/2021 < 200 100
MW-86 20210802 8/2/2021 < 5 2.5 MW-30_20210804 8/4/2021 < 200 100
MW-14D 20210802 8/2/2021 < 5 2.5 MW-31_20210803 8/3/2021 < 200 100
MW-31 D20210803 8/3/2021 < 5 2.5 DUP-1-20210803 8/3/2021 < 200 100
MW-65D 20210802 8/2/2021 < 5 2.5 MW-32 20210805 8/5/2021 < 200 100
MW-81 D_20210803 8/3/2021 < 5 2.5 MW-33 20210805 8/5/2021 < 200 100
EB-1-20210802 8/2/2021 < 5 2.5 MW-34 20210804 8/4/2021 < 200 100
EB-2-20210802 8/2/2021 < 5 2.5 MW-35 20210805 8/5/2021 < 200 100
FB-1-20210802 8/2/2021 < 5 2.5 MW-36 20210806 8/6/2021 < 200 100
FB-2-20210802 8/2/2021 < 5 2.5 MW-41 20210804 8/4/2021 < 200 100
EB-2-20210803 8/3/2021 < 5 2.5 MW-42 20210802 8/2/2021 < 200 100
FB-2-20210803 8/3/2021 < 5 2.5 MW-43 20210805 8/5/2021 < 200 100
E13-1-20210806 8/6/2021 < 5 2.5 MW-44 20210803 8/3/2021 < 200 100
FB-1-20210806 8/6/2021 < 5 2.5 MW-45 20210802 8/2/2021 < 200 100
MW-29 20210805 8/5/2021 < 2 1 MW-46_20210803 8/3/2021 < 200 100
MW-01 20210805 8/5/2021 < 0.2 0.1 MW-49_20210802 8/2/2021 < 200 100
MW-02 20210806 8/6/2021 < 0.2 0.1 MW-51_20210802 8/2/2021 < 200 100
MW-03 20210805 8/5/2021 < 0.2 0.1 DUP-2-20210802 8/2/2021 < 200 100
MW-04 20210806 8/6/2021 < 0.2 0.1 MW-53_20210805 8/5/2021 < 200 100
MW-05 20210806 8/6/2021 < 0.2 0.1 DUP-2-20210805 8/5/2021 < 200 100
MW-06 20210804 8/4/2021 < 0.2 0.1 MW-56 20210804 8/4/2021 < 200 100
MW-07 20210805 8/5/2021 < 0.2 0.1 MW-57 20210804 8/4/2021 < 200 100
MW-08 20210803 8/3/2021 < 0.2 0.1 MW-58 20210805 8/5/2021 < 200 100
MW-09 20210804 8/4/2021 < 0.2 0.1 MW-59 20210805 8/5/2021 < 200 100
MW-12 20210806 8/6/2021 < 0.2 0.1 MW-60 20210803 8/3/2021 < 200 100
MW-13 20210803 8/3/2021 < 0.2 0.1 MW-62 20210802 8/2/2021 < 200 100
MW-14 20210803 8/3/2021 < 0.2 0.1 MW-63 20210805 8/5/2021 < 200 100
MW-1 520210806 8/6/2021 < 0.2 0.1 MW-64 20210802 8/2/2021 < 200 100
MW-1 620210804 8/4/2021 < 0.2 0.1 MW-65 20210802 8/2/2021 < 200 100
MW-17 20210804 8/4/2021 < 0.2 0.1 1 MW-66 20210802 8/2/2021 < 200 100
NC009000 GW DATA GENERIC RPA Part 4, data
-2 - - - - 8/25/2022

REASONABLE POTENTIAL ANALYSIS
3 4
Use"PASTE SPECIAL Use"PASTE SPECIAL
Ethyl-tert-butyl ether values"then"COPY". tert-Amyl Alcohol values"then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20210803 8/3/2021 < 400 400 Std Dev. 73.0550 MW-19 20210803 8/3/2021 < 4000 2000 Std Dev. 365.1321
MW-29 20210805 8/5/2021 < 400 400 Mean 27.6724 MW-29 20210805 8/5/2021 < 4000 2000 Mean 139.0345
MW-38 20210804 8/4/2021 < 100 100 C.V. 2.6400 MW-38 20210804 8/4/2021 < 1000 500 C.V. 2.6262
MW-54 20210805 8/5/2021 < 100 100 n 58 MW-54 20210805 8/5/2021 < 1000 500 n 58
MW-52 20210805 8/5/2021 < 40 40 MW-52_20210805 8/5/2021 < 400 200
MW-71 20210805 8/5/2021 < 40 40 Mult Factor= 1.0000 MW-71_20210805 8/5/2021 < 400 200 Mult Factor= 1.0000
MW-50_20210803 8/3/2021 < 20 20 Max. Value 400.0 pg/L MW-50_20210803 8/3/2021 114 114 Max. Value 2000.0 fag/L
MW-01_20210805 8/5/2021 < 10 10 Max. Pred Cw 400.0 pg/L MW-01_20210805 8/5/2021 < 100 50 Max. Pred Cw 2000.0 pg/L
MW-02 20210806 8/6/2021 < 10 10 MW-02_20210806 8/6/2021 < 100 50
MW-03 20210805 8/5/2021 < 10 10 MW-03_20210805 8/5/2021 < 100 50
MW-04 20210806 8/6/2021 < 10 10 MW-04_20210806 8/6/2021 < 100 50
MW-05 20210806 8/6/2021 < 10 10 MW-05_20210806 8/6/2021 < 100 50
MW-06 20210804 8/4/2021 < 10 10 MW-06_20210804 8/4/2021 < 100 50
MW-07 20210805 8/5/2021 < 10 10 MW-07_20210805 8/5/2021 < 100 50
MW-08 20210803 8/3/2021 < 10 10 MW-08_20210803 8/3/2021 < 100 50
MW-09 20210804 8/4/2021 < 10 10 MW-09_20210804 8/4/2021 < 100 50
MW-12 20210806 8/6/2021 < 10 10 MW-12_20210806 8/6/2021 < 100 50
MW-13 20210803 8/3/2021 < 10 10 MW-13_20210803 8/3/2021 < 100 50
MW-14 20210803 8/3/2021 < 10 10 MW-14_20210803 8/3/2021 < 100 50
MW-15 20210806 8/6/2021 < 10 10 MW-15_20210806 8/6/2021 < 100 50
MW-16 20210804 8/4/2021 < 10 10 MW-16_20210804 8/4/2021 < 100 50
MW-17 20210804 8/4/2021 < 10 10 MW-17_20210804 8/4/2021 < 100 50
MW-20 20210804 8/4/2021 < 10 10 MW-20_20210804 8/4/2021 < 100 50
MW-21 20210803 8/3/2021 < 10 10 MW-21_20210803 8/3/2021 < 100 50
MW-23 20210803 8/3/2021 < 10 10 MW-23_20210803 8/3/2021 < 100 50
MW-25 20210804 8/4/2021 < 10 10 MW-25_20210804 8/4/2021 < 100 50
MW-27 20210805 8/5/2021 < 10 10 MW-27_20210805 8/5/2021 < 100 50
MW-28 20210804 8/4/2021 < 10 10 MW-28_20210804 8/4/2021 < 100 50
DUP-1-20210804 8/4/2021 < 10 10 DUP-1-20210804 8/4/2021 < 100 50
MW-30 20210804 8/4/2021 < 10 10 MW-30_20210804 8/4/2021 < 100 50
MW-31 20210803 8/3/2021 < 10 10 MW-31_20210803 8/3/2021 < 100 50
DUP-1-20210803 8/3/2021 < 10 10 DUP-1-20210803 8/3/2021 < 100 50
MW-32 20210805 8/5/2021 < 10 10 MW-32_20210805 8/5/2021 < 100 50
MW-33 20210805 8/5/2021 < 10 10 MW-33_20210805 8/5/2021 < 100 50
MW-34 20210804 8/4/2021 < 10 10 MW-34_20210804 8/4/2021 < 100 50
MW-35 20210805 8/5/2021 < 10 10 MW-35_20210805 8/5/2021 < 100 50
MW-36 20210806 8/6/2021 < 10 10 MW-36_20210806 8/6/2021 < 100 50
MW-41 20210804 8/4/2021 < 10 10 MW-41_20210804 8/4/2021 < 100 50
MW-42 20210802 8/2/2021 < 10 10 MW-42_20210802 8/2/2021 < 100 50
MW-43 20210805 8/5/2021 < 10 10 MW-43_20210805 8/5/2021 < 100 50
MW-44 20210803 8/3/2021 < 10 10 MW-44_20210803 8/3/2021 < 100 50
MW-45 20210802 8/2/2021 < 10 10 MW-45_20210802 8/2/2021 < 100 50
MW-46 20210803 8/3/2021 < 10 10 MW-46_20210803 8/3/2021 < 100 50
MW-49 20210802 8/2/2021 < 10 10 MW-49_20210802 8/2/2021 < 100 50
MW-51 20210802 8/2/2021 < 10 10 MW-51_20210802 8/2/2021 < 100 50
DUP-2-20210802 8/2/2021 < 10 10 DUP-2-20210802 8/2/2021 < 100 50
MW-53 20210805 8/5/2021 < 10 10 MW-53_20210805 8/5/2021 < 100 50
DUP-2-20210805 8/5/2021 < 10 10 DUP-2-20210805 8/5/2021 < 100 50
MW-56 20210804 8/4/2021 < 10 10 MW-56_20210804 8/4/2021 < 100 50
MW-57 20210804 8/4/2021 < 10 10 MW-57_20210804 8/4/2021 < 100 50
MW-58 20210805 8/5/2021 < 10 10 MW-58_20210805 8/5/2021 < 100 50
MW-59 20210805 8/5/2021 < 10 10 MW-59_20210805 8/5/2021 < 100 50
MW-60 20210803 8/3/2021 < 10 10 MW-60_20210803 8/3/2021 < 100 50
MW-62 20210802 8/2/2021 < 10 10 MW-62_20210802 8/2/2021 < 100 50
MW-63 20210805 8/5/2021 < 10 10 MW-63_20210805 8/5/2021 < 100 50
MW-64 20210802 8/2/2021 < 10 10 MW-64_20210802 8/2/2021 < 100 50
MW-65 20210802 8/2/2021 < 10 10 MW-65_20210802 8/2/2021 < 100 50
MW-66 20210802 8/2/2021 < 10 5 MW-66 20210802 8/2/2021 < 100 50
NC009000 GW DATA GENERIC RPA Part 4, data
- 3 - — — — 8/25/2022

REASONABLE POTENTIAL ANALYSIS
5 6
Use"PASTE SPECIAL Use"PASTE SPECIAL
tert-Amylmethyl ether Values"then"COPY". tert-Butyl Alcohol Values"then"COPY".
Maximum data points Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
MW-19 20210803 8/3/2021 < 400 200 Std Dev. 36.5288 MW-19_20210803 8/3/2021 < 2000 1000 Std Dev. 182.5768
MW-29 20210805 8/5/2021 < 400 200 Mean 13.8621 MW-29_20210805 8/5/2021 < 2000 1000 Mean 69.3966
MW-54 20210805 8/5/2021 < 100 50 C.V. 2.6352 MW-38_20210804 8/4/2021 < 500 250 C.V. 2.6309
MW-38 20210804 8/4/2021 50.4 50.4 n 58 MW-54_20210805 8/5/2021 < 500 250 n 58
MW-52 20210805 8/5/2021 < 40 20 MW-52_20210805 8/5/2021 < 200 100
MW-71 20210805 8/5/2021 < 40 20 Mult Factor= 1.0000 MW-71_20210805 8/5/2021 < 200 100 Mult Factor= 1.0000
MW-50_20210803 8/3/2021 < 20 10 Max. Value 200.0 fag/L MW-50_20210803 8/3/2021 < 100 50 Max. Value 1000.0 pg/L
2
MW-01_20210805 8/5/2021 < 10 5 Max. Pred Cw 200.0 pg/L MW-01_20210805 8/5/2021 < 50 25 Max. Pred Cw 1000.0 pg/L
MW-02 0210806 8/6/2021 < 10 5 MW-02_20210806 8/6/2021 < 50 25
MW-03 20210805 8/5/2021 < 10 5 MW-03 20210805 8/5/2021 < 50 25
MW-04 20210806 8/6/2021 < 10 5 MW-04 20210806 8/6/2021 < 50 25
MW-05 20210806 8/6/2021 < 10 5 MW-05 20210806 8/6/2021 < 50 25
MW-06 20210804 8/4/2021 < 10 5 MW-06_20210804 8/4/2021 < 50 25
MW-07 20210805 8/5/2021 < 10 5 MW-07_20210805 8/5/2021 < 50 25
MW-08 20210803 8/3/2021 < 10 5 MW-08_20210803 8/3/2021 < 50 25
MW-09 20210804 8/4/2021 < 10 5 MW-09_20210804 8/4/2021 < 50 25
MW-12 20210806 8/6/2021 < 10 5 MW-12_20210806 8/6/2021 < 50 25
MW-13 20210803 8/3/2021 < 10 5 MW-13_20210803 8/3/2021 < 50 25
MW-14 20210803 8/3/2021 < 10 5 MW-14_20210803 8/3/2021 < 50 25
MW-1 520210806 8/6/2021 < 10 5 MW-15_20210806 8/6/2021 < 50 25
MW-16 20210804 8/4/2021 < 10 5 MW-16_20210804 8/4/2021 < 50 25
MW-1 720210804 8/4/2021 < 10 5 MW-17_20210804 8/4/2021 < 50 25
MW-20 20210804 8/4/2021 < 10 5 MW-20_20210804 8/4/2021 < 50 25
MW-23 20210803 8/3/2021 < 10 5 MW-21_20210803 8/3/2021 < 50 25
MW-25 20210804 8/4/2021 < 10 5 MW-23 20210803 8/3/2021 < 50 25
MW-27 20210805 8/5/2021 < 10 5 MW-25 20210804 8/4/2021 < 50 25
MW-28 20210804 8/4/2021 < 10 5 MW-27 20210805 8/5/2021 < 50 25
DUP-1-20210804 8/4/2021 < 10 5 MW-28 20210804 8/4/2021 < 50 25
MW-30 20210804 8/4/2021 < 10 5 DUP-1-20210804 8/4/2021 < 50 25
MW-31 20210803 8/3/2021 < 10 5 MW-30_20210804 8/4/2021 < 50 25
DUP-1-20210803 8/3/2021 < 10 5 MW-31 20210803 8/3/2021 < 50 25
MW-32 20210805 8/5/2021 < 10 5 DUP-1-20210803 8/3/2021 < 50 25
MW-33 20210805 8/5/2021 < 10 5 MW-32_20210805 8/5/2021 < 50 25
MW-34 20210804 8/4/2021 < 10 5 MW-33_20210805 8/5/2021 < 50 25
MW-35 20210805 8/5/2021 < 10 5 MW-34_20210804 8/4/2021 < 50 25
MW-36 20210806 8/6/2021 < 10 5 MW-35_20210805 8/5/2021 < 50 25
MW-41 20210804 8/4/2021 < 10 5 MW-36_20210806 8/6/2021 < 50 25
MW-42 20210802 8/2/2021 < 10 5 MW-41 20210804 8/4/2021 < 50 25
MW-43 20210805 8/5/2021 < 10 5 MW-42 20210802 8/2/2021 < 50 25
MW-44 20210803 8/3/2021 < 10 5 MW-43 20210805 8/5/2021 < 50 25
MW-45 20210802 8/2/2021 < 10 5 MW-44 20210803 8/3/2021 < 50 25
MW-46 20210803 8/3/2021 < 10 5 MW-45 20210802 8/2/2021 < 50 25
MW-49 20210802 8/2/2021 < 10 5 MW-46 20210803 8/3/2021 < 50 25
MW-51 20210802 8/2/2021 < 10 5 MW-49 20210802 8/2/2021 < 50 25
DUP-2-20210802 8/2/2021 < 10 5 MW-51 20210802 8/2/2021 < 50 25
MW-53 20210805 8/5/2021 < 10 5 DUP-2-20210802 8/2/2021 < 50 25
DUP-2-20210805 8/5/2021 < 10 5 MW-53 20210805 8/5/2021 < 50 25
MW-56 20210804 8/4/2021 < 10 5 DUP-2-20210805 8/5/2021 < 50 25
MW-57 20210804 8/4/2021 < 10 5 MW-56_20210804 8/4/2021 < 50 25
MW-58 20210805 8/5/2021 < 10 5 MW-57_20210804 8/4/2021 < 50 25
MW-59 20210805 8/5/2021 < 10 5 MW-58_20210805 8/5/2021 < 50 25
MW-60 20210803 8/3/2021 < 10 5 MW-59_20210805 8/5/2021 < 50 25
MW-62 20210802 8/2/2021 < 10 5 MW-60 20210803 8/3/2021 < 50 25
MW-63 20210805 8/5/2021 < 10 5 MW-62_20210802 8/2/2021 < 50 25
MW-64 20210802 8/2/2021 < 10 5 MW-63_20210805 8/5/2021 < 50 25
MW-65 20210802 8/2/2021 < 10 5 MW-64_20210802 8/2/2021 < 50 25
MW-66 20210802 8/2/2021 < 10 5 MW-65_20210802 8/2/2021 < 50 25
MW-21 20210803 8/3/2021 3.6 3.6 MW-66 20210802 8/2/2021 < 50 25
NC009000 GW DATA GENERIC RPA Part 4, data
-4 - — — — 8/25/2022

Colonial Pipeline Company — 2020-L1 -SR2448 REASONABLE POTENTIAL ANALYSIS Outfall 001
NCOO9OOOO 2018 Generic RPA - 95% Probability/95% Confidence QW = 0.576 MGD
MAXIMUM DATA POINTS = 58
Qw (MGD) = 0.5760 WWTP/WTP Class: PC-1
1Q10S (cfs) = 0.21 IWC% @ 1Q10S = 80.9575626
7Q10S (cfs) = 0.25 IWC% @ 7Q10S = 78.1239062
7Q10W (cfs) = 0.42 IW%C @ 7Q10W 68.0073126
30Q2 (cfs)= 0.56 IWC% @ 30Q2 = 61.4537445
Avg. Stream Flow, QA (cfs) = 3.90 IWC% @ QA= 18.6279419
Receiving Stream: North Prong Clark Creek HUC 30401050101 Stream Class: C
PARAMETER NC STANDARDS OR EPA CRITERIA J Cn REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION
CY
TYPE Chronic Standard Acute n # Det. Max Pred Cw Allowable Cw
Acute: NO WQS
n-Butanol mg/L 58 0 2.5
--Chronic: ----------- -------------------------------
NO DETECTS Max MDL 5 No Detects
Acute: NO WQS
Ethanol NC 5000 FW(7QIOs) µg/L 58 0 4000.0
--Chronic: ----6,400.09 - -------------------------------
NO DETECTS Max MDL = 8000 No Detects
Acute: NO WQS
Ethyl-tent-butyl ether µg/L 58 0 400.0 _
--Chronic: ----------- -------------------------------
NO DETECTS Max MDL 800 No Detects
Acute: NO WQS
tert-Amyl Alcohol µg/L 58 1 2000.0 _
--Chronic: ----------- -------------------------------
No Standards, Criteria or TBEL.
No value > Allowable Cw
Acute: NO WQS
tert-Amylmethyl ether µg/L 58 2 200.0
Chronic: No Standards, Criteria or TBEL.
No value >Allowable Cw
Acute: NO WQS
tert-Butyl Alcohol µg/L 58 0 1000.0 _
--Chronic: ----------- -------------------------------
No Detects
NO DETECTS Max MDL = 2000
NC009000_GW DATA—GENERIC RPA_Part 4, rpa
Page 5 of 5 8/25/2022