4204_HalifaxClosedMSWLF_CAERUpdate_20171001

Corrective Action Evaluation Report

Halifax County Landfill
Halifax County, North Carolina

Prepared for:

Halifax County Department of Public Utilities
26 N. King Street
Halifax, North Carolina 27839

October 2017

Prepared by:

© 2017 Smith Gardner, Inc.
This document is intended for the sole use of the client for which it was prepared and
for the purpose agreed upon by the client and Smith Gardner, Inc.

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Corrective Action Evaluation Report

Halifax County
Halifax, North Carolina

Prepared For:
Department of Public Utilities
Halifax, North Carolina

S+G Project No. Halifax 17-4

Madeline German, P.G.
Geologist

Joan A. Smyth, P.G.
Senior Hydrogeologist

October 2017

DocuSign Envelope ID: 6CBF73A5-76B6-4417-8045-74A68D98A6EE
10/11/2017
10/11/2017

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Halifax County Corrective Action Evaluation Report
October 2017 Table of Contents Page v

Halifax County

Corrective Action Evaluation Report

Table of Contents
Page

1.0 INTRODUCTION ......................................................................................................... 1 
1.1 Site Background ........................................................................................................ 1 
1.2 Aquifer Characteristics ............................................................................................. 3 
1.3 Site Conceptual Model .............................................................................................. 4 
1.4 Sampling History ....................................................................................................... 4 
1.5 Contaminant Distribution .......................................................................................... 5 
2.0 CORRECTIVE ACTION SUMMARY ............................................................................... 7 
2.1 Aquifer Conditions ..................................................................................................... 7 
2.1.1 Physical Changes .......................................................................................... 7 
2.1.2 Chemical Changes ........................................................................................ 7 
2.1.2.1 Constituents of Concern ................................................................. 7 
2.1.2.2 Inorganic Constituents (Metals) ..................................................... 8 
2.2 Plume Characteristics .............................................................................................. 8 
2.2.1 Physical Characteristics ............................................................................... 8 
2.2.2 Chemical Characteristics ............................................................................. 9 
2.2.3 Monitored Natural Attenuation (MNA) ......................................................... 9 
2.2.4 Biochlor ....................................................................................................... 10 
3.0 CORRECTIVE ACTION PLAN UPDATES .................................................................... 11 
3.1 Modifications to the Selected Remedy ................................................................... 11 
3.1.5 Upgradient Contamination (Landfill Gas Trench) ...................................... 11 
3.1.6 Downgradient Contamination (Monitored Natural Attenuation) ............... 12 
3.2 Contingency Plan ..................................................................................................... 12 
4.0 CONCLUSION .......................................................................................................... 13 
4.3 Evaluation of Effectiveness ..................................................................................... 13 
4.4 Report Submittals ................................................................................................... 13 
4.5 Completeness of Corrective Action ........................................................................ 13 

Halifax County Corrective Action Evaluation Report
October 2017 Table of Contents Page vi
Table of Contents Continued

FIGURES
Figure 1 Topograpic Map
Figure 2 Site Location Map
Figure 3 Potentiometric Surface Map – February 2017
Figure 4 February 2017 Detection above the 2L/GWP Standard
Figure 5 Total VOC Isoconcentration Maps

TABLES
Table 1 Well Construction Details 
Table 2 Historic Groundwater Elevations
Table 3 Groundwater Velocity Calculations
Table 4 Historic VOC Detections
Table 5 February 2017 Inorganic Detections
Table 6 MNA Parameter Summary
Table 7 Sampling Schedule

APPENDICES
Appendix A Well Information
Appendix B Concentration Graphs
Appendix C BioChlor Models

Halifax County Corrective Action Evaluation Report
September 2017 Page 1
1.0 INTRODUCTION
This report is the 5 year update to the June 2012 Corrective Action Evaluation Report related to
ongoing corrective measures and MNA monitoring at the Halifax County Landfill.
1.1 Site Background
The Halifax County Landfill (North Carolina Permit # 42-04) is located at 921 Liles Road,
Littleton, Halifax County North Carolina situated southwest of Roanoke Rapids, North
Carolina near Aurelian Springs. Prior to operation as a construction and demolition
(C&D) landfill the site operated as an unlined municipal solid waste (MSW) landfill, but
stopped accepting MSW in December, 1997 and was closed with a compacted soil cover
before September, 1998. An interim cover was used on the closed MSW landfill area
that is currently receiving C&D waste, and the remaining areas were closed in
accordance with 15A NCAC 13B.0500.

Halifax County is currently transporting MSW to a Subtitle D landfill in Virginia and
accepting construction and demolition waste into a C&D landfill (permit 42-04 CDLF-
1998) located on top of the closed MSW landfill, to bring the closed landfill area up to
final closure contours. Halifax County also operates a coal ash monofill landfill unit
(permit 42-04-indus-1994) located north of the MSW landfill. The monofill landfill is not
under any requirement for corrective action at this site and is not included in this report.
A topographic map showing the facility location is provided as Figure 1. Water quality
monitoring is performed at both sites semi-annually. Available well summary
information is provided in Table 1 and well construction records are provided in
Appendix A.

Halifax County retained Smith Gardner, Inc. (S+G) (formerly Richardson Smith Gardner &
Associates, Inc. (RSG)) to develop a Corrective Action Plan (CAP) for the closed C&D over
existing, unlined MSW. The CAP was intended to develop and implement a site-specific
remediation plan to address groundwater contamination associated with the closed
MSW landfill. A CAP was prepared in accordance with Rules 15A NCAC 13B .1636 &
.1637 and submitted to the North Carolina Department of Environment and Natural
Resources (NCDENR), Division of Waste Management (DWM), Solid Waste Section (SWS)
in May 20091 and approved June 8, 20092. These documents defined the areas of
concern (AOC) as the upgradient and downgradient plume areas.

In March 20123 S+G submitted a Corrective Action Parameter Reduction Request. This
letter report cited recent analytical results demonstrating a reduction in VOC
concentrations across the site. Due to these reduced concentrations, S+G requested

1 Corrective Action Plan for Halifax County Landfill, prepared by Richardson Smith Gardner & Associates, submitted
May 2009.
2 Letter from Zinith Barbee, NCDENR to Frank Ralph, Halifax County, June 8, 2009. (Doc ID 7668)
3 “Corrective Action Parameter Reduction Request” letter to Ms. Jaclynne Drummond, from Ms. Joan A. Smyth of
Richardson Smith Gardner & Associates, Inc., March 9, 2012. (DIN 16352)

Halifax County Corrective Action Evaluation Report
September 2017 Page 2
MW-2A, MW-6D, MW-17 and MW-18S MNA parameter monitoring be reduced to
annually; and MW-7D would return to detection monitoring for Appendix I constituents.
Additionally, hydrogen, volatile fatty acids, dissolved methane, ethane and ethane, BOD
and carbon dioxide were requested to be sampled every third year. Methylene chloride
and toluene were requested to be removed as constituents of concern due to lack of 2L
exceedances/detections.

In June 20124 S+G prepared the first Corrective Action Evaluation Report (CAER). The
CAER report summarized the CAP’s effectiveness to this point and renewed the requests
of the March 2012 letter. This report presented MNA as a still effective remedy and
showed VOC concentrations were decreasing based on analytical results. . This report
also presented data as to why further evaluation of Bis (2-ethylhexyl)phthalate was not
warranted.

In October 2012 NCDENR (now NC Department of Environmental Quality (DEQ))
approved the reduced frequency sampling for MW-6D, MW-17 and MW-18S, but not for
MW-2A due to recent vinyl chloride detections. Additionally MW-7D was approved for
Appendix I sampling with Appendix II sampling to be performed every third year in
conjunction with the full MNA parameter suite. Methylene chloride and toluene were
removed from the constituents of concern list, but 1,1-Dichloroethane was added due to
historic detections above the 2L Standard since 2004 in MW-2AD.

The following table shows the historic analysis for the monitoring network:

Well Corrective Action
May 2009
Corrective Action Evaluation Report
March 2012 2
MW-1 1 Detection
Semi-Annual
Detection
Semi-Annual
MW-2A Assessment + MNA
Semi-Annual
Assessment - Semi-Annual
Limited MNA - Annual (spring) 2
MW-2AD Assessment + MNA
Semi-Annual
Assessment + Limited MNA 2
Semi-Annual
MW-3AS Assessment + MNA
Semi-Annual
Assessment + Limited MNA 2
Semi-Annual
MW-3D Assessment + MNA
Semi-Annual
Assessment + Limited MNA 2
Semi-Annual
MW-6D Assessment + MNA
Semi-Annual
Assessment - Semi-Annual
Limited MNA - Annual (spring) 2
MW-7D Assessment
Semi-Annual
Detection
Semi-Annual

4 Corrective Action Evaluation Report, for Halifax County Landfill, by Richardson Smith Gardner &
Associates, Inc., June 2012. (DIN 16760)

Halifax County Corrective Action Evaluation Report
September 2017 Page 3
MW-15R Assessment
Semi-Annual
Assessment
Semi-Annual
MW-16A Assessment
Semi-Annual
Assessment
Semi-Annual
MW-17 Assessment + MNA
Semi-Annual
Assessment - Semi-Annual
Limited MNA - Annual (spring) 2
MW-18S Assessment + MNA
Semi-Annual
Assessment - Semi-Annual
Limited MNA - Annual (spring) 2
MW-18D Assessment + MNA
Annual
Assessment - Semi-Annual
Limited MNA - Annual (spring) 2
G-13 Detection + MNA
Annual
Detection + MNA
Annual
G-13D Detection
Annual
Detection
Annual

Notes:
1. MW-1 Serves as the background well for the site
2. Full MNA analysis every 3rd year (2015, 2018, 2021, etc.)
3. Limited MNA analysis included: sulfide, iron, chloride, nitrate, TOC and COD
1.2 Aquifer Characteristics
The site lies on the eastern edge of the Eastern Piedmont Physiographic Province;
slightly west of the Coastal Plain overlap. This site is bounded by NC 48 to the north,
Brewers Creek to the east and south and a tributary of Brewers Creek to the south and
west.

Depths to groundwater generally range from near surface in lowland areas along
Brewer’s Creek and its tributary to up to 45 ft. below grade along the ridge east of the
landfill. Groundwater flow direction is generally west towards Brewer’s Creek and its
tributary, which is consistent with flow patterns since 1993. There are minor seasonal
variations in the flow pattern, but the overall flow direction remains stable. Please note
Brewer’s Creek has historically been blocked by a beaver dam downgradient of the site,
which has impacted the area near MW-2Aa and MW-3A with slow moving water and an
enlarged ponded area. Table 2 presents the historical water levels measured at the
site.

Groundwater velocities on-site ranged from 3.26 x 10-4 ft/day in MW-16A to 0.147 ft/day
in MW-2A during the most recent sampling event (February 2017). Table 3 presents
groundwater velocity calculations from the spring 2017 groundwater monitoring event.
A single-day potentiometric map is presented as Figure 3.

Halifax County Corrective Action Evaluation Report
September 2017 Page 4
1.3 Site Conceptual Model
Boring logs and construction records indicate the subsurface lithology below the site is
composed primarily of sand and silty sand to a depth of approximately 40 feet below
ground surface (bgs). Bedrock was encountered at 32 feet bgs in MW-18D, on the
southwestern, downgradient side of the landfill. Hydraulic conductivity values were
measured in select wells by slug testing and range from 0.057 ft/day (MW-16A) to 1.835
ft/day (MW-2A). Porosity values were assumed to be 20% from published values based
on grain size found in Groundwater and Wells5. Approximate groundwater velocity
ranges from 3.26 x 10-4 ft/day in MW-16A to 0.147 ft/day in MW-2A. Groundwater flows
through unconsolidated sediment from east to west towards the local discharge feature
of Brewer’s Creek.

Landfill gas and phase transference are influencing the upgradient plume’s migration
path. The primary mechanism for downgradient plume movement is advective flow
thorough the unconsolidated subsurface soils.

Half-life degradation is the amount of time needed for a constituent concentration to
decrease by half compared to its initial concentration. It is used to predict the
concentration of a substance over time. Reductive dechlorination is the common
biotransformation path for most chlorinated solvents. The constituents of concern: 1,1-
dichloroethane, benzene, tetrachloroethene, trichloroethene and vinyl chloride have
been detected in up and downgradient monitoring wells above groundwater standards.
These constituents undergo volatilization when released from soil, ground or surface
water. Half-life reactions in groundwater vary greatly.

Half-Life in Groundwater6
Constituent Half-Life (high) Half-Life (low)
1,1-Dichloroethane 22 weeks 32 days
Benzene 24 months 10 days
Tetrachloroethene 2 years 12 months
Trichloroethene 4.5 years 10.7 months
Vinyl Chloride 95 months 8 weeks

1.4 Sampling History
Semi-annual ground and surface water monitoring for Appendix I constituents was
initiated at the Halifax County Landfill in December, 1993. Monitoring included Appendix
I detection monitoring (1993 - 1995) and Appendix II assessment monitoring (1995 -
present). Groundwater monitoring results from the late 1990’s and early 2000’s

5 Driscoll, Fletcher, Ph.D., Groundwater and Wells, Johnson Division, 1986.
6 Howard, P.H., Boethling, R.S., Jarvis, W.F., Myelan, W.M., and Michalenko, E.M., 1991, Handbook of Environmental Degradation
Rates, Lewis Publishers, Inc, Chelsea, MI.

Halifax County Corrective Action Evaluation Report
September 2017 Page 5
indicated groundwater impacts above the 2L groundwater standards (15A NCAC 2L.0200
through .0202). In 2007, an Assessment of Corrective Measures was prepared to
evaluate remediation options at the site. The CAP was written in response to rule 15A
NCAC 13B.0547 requiring a CAP be submitted with a Permit Application for C&D landfills
accepting waste on top of closed MSW landfills. The first CAER was prepared in 2012 to
evaluate the corrective action performance and recommend changes based on updated
groundwater data.. This report is the second 5-year update on corrective action
progress at the facility as required by rule 15A NCAC 13B .0547.
1.5 Contaminant Distribution
The original list of constituents of concern in the CAP included benzene, methylene
chloride, toluene, tetrachloroethene, trichloroethene and vinyl chloride. Heptachlor and
alpha BHC were listed as constituents of concern for MW-15R only and bis(2-
ethylhexyl)phthalate was included in the CAP to be re-evaluated. In 2012, toluene and
methylene chloride were removed from the constituent of concern list, due to no recent
detections, and 1,1-dichloroethane was added, due to recent concentrations above the
2L Standard. Continued evaluation of bis(2-ethylhexyl)phthalate determined the
constituent was not present in the groundwater, therefore further investigation was not
warranted for this parameter. Additionally, heptachlor and alpha BHC had not been
detected in groundwater samples since 2008 and 2009 respectively, and were removed
as constituents of concern. Therefore in 2012 the constituent of concern list included
1,1-dichloroethane, benzene, tetrachloroethene, trichloroethene and vinyl chloride, plus
heptachlor, alpha BHC for MW-15R only.

Groundwater detections above the 2L Standard are limited to relatively small areas
located immediately downgradient and upgradient of the landfill.

Downgradient wells MW-2A, MW-2AD, MW-3AS, MW-3D, MW-6D and MW-17 have
reported constituent of concern concentrations above their respective 2L Standards
within the last two years. MW-6S is not sampled, however, it is assumed to be impacted
due to its location adjacent to MW-6D (which has constituent of concern detections
above 2L within the last two years) and the fact that it is screened in the same aquifer,
but at a higher elevation than MW-6D. These wells are located within 175 feet from the
waste boundary.

In upgradient wells, MW-15R and MW-16A, impact above the 2L standards is primarily
due to landfill gas migration and phase transference. MW-15R was historically impacted
with constituent of concern concentrations above the 2L Standard; however recent
laboratory analysis indicate decreased concentrations of VOCs to at or below their 2L
Standards. Sampling results from MW-16A still indicate impact above 2L standards in
this well. The area adjacent to MW-15R is approximately 210 feet from the waste mass
and MW-16A is located 140 feet from the waste mass.

Halifax County Corrective Action Evaluation Report
September 2017 Page 6
The most recent groundwater quality sample results, collected February 14, 2017,
detected 1,1-dichloroethane (MW16A & MW-17), 1,2-dichloropropane (MW-16A),
benzene (MW-3AS & MW-16A) and tetrachloroethene (MW-7D, MW-16A & MW-17), at
concentrations above their respective North Carolina Groundwater Standards (2L
Standards).

Historic detection graphs compared with the 2L Standard for wells located in both the
upgradient and downgradient aquifers are included as Appendix B. Historic water
quality sampling results are presented in Table 4. Figure 4 illustrates the reported
detections above the 2L Standards for February 2017. Isoconcentration maps
illustrating total VOCs over the past four sampling events are provided as Figure 5.

No organic constituents have been detected in collected surface water samples

Halifax County Corrective Action Evaluation Report
September 2017 Page 7
2.0 CORRECTIVE ACTION SUMMARY
2.1 Aquifer Conditions
The groundwater contaminant source appears to be the former MSW landfill unit. The
primary mechanisms for downgradient impact are either precipitation that has
percolated through the landfill waste, allowing VOCs to partition from solid/liquid phases
into a dissolved phase, and subsequently to mix with groundwater, or by landfill gas
migration and condensation/phase transference. Impact to upgradient wells was
previously determined to be from landfill gas through phase transference and a landfill
gas vent trench system is the method of corrective action for this AOC. Downgradient,
the impact is due to leachate from the waste. Due to the limited plume area and several
other factors, Natural Attenuation was accepted as the method for corrective action for
this AOC. The current constituents of concern are identified as 1,1-dichloroethane,
benzene, tetrachloroethene, trichloroethene and vinyl chloride. Surface waters remain
un-impacted and impact above the 2L standard is not outside the compliance boundary.
2.1.1 Physical Changes
Halifax County has continued the C&D landfill operation on top of the closed
MSW landfill. Since 1999, several remedies have been implemented to assist
with landfill gas control in the upgradient plume area. In the summer of 1999 a
passive gas vent trench was installed, running approximately 350 feet in length,
parallel to the eastern edge of waste; near MW-15 and MW-15R. Originally the
trench had four passive vents. When the flare was installed, three of these vents
were capped and all LFG was vented through the flare system. A second flare
was installed on a passive vent closer to MW-16A; this flare is not associated
with any trench, nor are there other passive vents in this area. This solar flare
vent system was installed August, 26, 2010. Since the 2012 CAER no additional
physical actions have been implemented at the facility related to corrective
action. The trench and flare locations are shown on Figure 4.
2.1.2 Chemical Changes
2.1.2.1 Constituents of Concern
The current constituents of concern are 1,1-dichloroethane, benzene,
tetrachloroethene, trichloroethene and vinyl chloride. . Since 2012
Halifax County has generally seen a reduction in the quantity of 2L
Standard exceedances. Total VOC concentrations at the facility areas of
concern (AOCs) have also shown a decrease in concentrations, indicating
natural degradation is occurring on-site.

In the upgradient AOC total VOCs in samples from MW-15R have
decreased from 3.5 ug/l in the February 2012 to 0 ug/l in the February

Halifax County Corrective Action Evaluation Report
September 2017 Page 8
2017 event. VOCs in MW-16A increased from 107.7 ug/l, in the February
2012 sampling event to 198.9 ug/l in the most recent sampling event
performed February 2017. The downgradient AOC saw a total VOC
reduction from 42.3 ug/l in February 2012 to 40.7 ug/l in February 2017.
Graphs illustrating historic VOC concentrations for up and down
monitoring locations are included in Appendix B.

Based on water quality laboratory results several trends can be observed
across the site, excluding MW-16A. Sampling results for benzene,
trichloroethene and vinyl chloride indicated decreased concentrations.
Tetrachloroethene concentrations decreased over the study period except
for a 2L exceedance in MW-2D in the February 2017. We will continue to
watch this location and parameter. 1,1-Dichloroethane concentrations
are generally decreasing, except in MW-17. Overall, total VOCs in
groundwater have reduced.
2.1.2.2 Inorganic Constituents (Metals)
Metals continue to be present across the facility in ground and surface
water samples, including background well MW-1. They are still
considered to be naturally occurring. Iron was the only inorganic
constituent detected above its 2L standard in samples collected for the
February 2017 semi-annual sampling event. Elevated turbidity levels are
believed to have contributed to inorganic detections. Dissolved analysis
for cobalt, iron and vanadium confirmed inorganic detections were a
result of suspended solids in the collected groundwater samples. Table
5 shows inorganic analytical results from the February 2017 sampling
event.
2.2 Plume Characteristics
2.2.1 Physical Characteristics
The downgradient plume remains delineated within the property boundary on the
southwestern side by Brewer’s Creek. Sentinel wells G-13 and G-13D have not
exceeded 2L Standards for any VOC in the past two years. There continue to be
no detections in surface water samples indicating the local drainage features
remain non-impacted.

The upgradient plume remains delineated within the property boundary. Active
and passive landfill gas methods are in use near MW-15R and MW-16A.

Halifax County Corrective Action Evaluation Report
September 2017 Page 9
2.2.2 Chemical Characteristics
The CAP identified different target constituents for the different AOCs,
upgradient and downgradient at the facility; however the current constituent of
concern list relates to wells in both the up and down gradient AOCs.

In the upgradient plume contaminant concentrations in samples collected from
MW-15R have been reduced to only tetrachloroethene and concentrations
fluctuate between the 2L standard and non-quantifiable. In MW-16A 1,1-
dichloroethane, 1,2-dichloropropane, tetrachloroethene, trichloroethene,
benzene and vinyl chloride were identified in groundwater samples at
concentrations above their 2L Standard over the past 2 years.

In the downgradient AOC 1,1-dichloroethane, tetrachloroethene and vinyl
chloride were identified in samples collected since February 2015 from multiple
downgradient wells above their 2L Standards. MW-2AD also had reported
concentrations of 1,2-dichloropropane and trichloroethene and MW-6D also had
a reported concentration of Beta BHC. These additional parameters were not
detected with consistency therefore will be observed but are not considered
constituents of concern at this time.
2.2.3 Monitored Natural Attenuation (MNA)
The Environmental Protection Agency (EPA) defines natural attenuation as "a
variety of physical, chemical, or biological processes that, under favorable
conditions, act without human intervention to reduce the mass, toxicity, mobility,
volume, or concentration of contaminants in soil or groundwater.” Monitored
natural attenuation is analyzing groundwater and/or soil for specific parameters
that provide a picture of the processes occurring in the subsurface. Based on
these results it is possible to infer the state of the remedial processes at work in
a system.

The NCDEQ issued guidance related to MNA in 2008. Baseline sampling
parameters include:

Dissolved Oxygen Methane Chloride
Nitrate Ethane/Ethene Alkalinity
Iron Dissolve Oxygen (DO) TOC
Sulfate Oxygen Reduction Potential pH
Sulfide Volatile Fatty Acids Temperature
BOD Hydrogen Specific Conductivity
COD CO2

The full MNA parameter list is monitored at the Halifax County site for both
events every three years.

Halifax County Corrective Action Evaluation Report
September 2017 Page 10
Results from the February 2017 MNA parameters indicate limited evidence for
anaerobic biodegradation of chlorinated solvents. Full MNA sampling is
scheduled for 2018.
2.2.4 Biochlor
Biochlor is a screening model that is based on a sequential, first-order, coupled
reactive transport model. The model assumes simple groundwater flow
conditions and uses user provided site specific data wherever possible to
determine potential solute transport and will present the maximum extent of
dissolved-phase plume migration. Biochlor has a screening tool that can be
used to determine if natural attenuation is occurring. The Biochlor program can
also be used to determine the effectiveness of natural attenuation.

Biochlor evaluation for the downgradient plume was performed based on the
sample results from the February 2017 semi-annual monitoring event. During
this event, only Tetrachlorethene was detected at a concentration above the 2L
standard. Based on the concentrations of chlorinated compounds during this
event, which are in the low parts per billion (ppb), there is evidence of natural
attenuation at the site. Biochlor models for the downgradient plume are
presented in Appendix C.

Halifax County Corrective Action Evaluation Report
September 2017 Page 11
3.0 CORRECTIVE ACTION PLAN UPDATES
A number of factors influenced the original selection of remedial alternatives.

• Groundwater contamination exists at relatively low levels (ppb range).
• The horizontal ground water impact is limited to approximately 200 feet downgradient
and upgradient of the landfill.
• Calculations of Hazard Index and excess cancer risk are within U.S. EPA acceptable
limits.
• Landfill gas influences groundwater impact at upgradient locations.
• Natural attenuation has been on-going at the site.

Due to these factors, a landfill gas trench system between the landfill and MW-15 and MW-15R
was the chosen remedy for the upgradient AOC. The original passive vent trench was later
modified with a solar flare to further enhance LFG recovery. Flare and trench locations are
shown on Figure 4.

For the downgradient AOC, natural attenuation was the chosen remedy.
3.1 Modifications to the Selected Remedy
3.1.5 Upgradient Contamination (Landfill Gas Trench)
Impacted groundwater upgradient of the landfill is located near MW-15R and
MW-16A. This impact is primarily due to landfill gas migration and phase
transference. The impact in the area adjacent to MW-15R is approximately 210
feet from the waste mass and monitoring well MW-16A is located 140 feet from
the waste mass.

Monitoring wells, MW-15R and MW-16A, have been sampled semi-annually in
accordance with the CAP. Groundwater samples were analyzed for the SWS list
of MNA parameters to establish a baseline. Analytical results from MW-15R
indicate VOC concentrations are decreasing. Total VOC concentrations for this
location are generally around 1 ug/l. Tetrachloroethene is the only parameter
still detected at concentrations above the 2L Standard in samples collected from
this location. No adjustments to the selected remedy for MW-15R are needed
this time.

Analytical results from MW-16A indicate VOC concentrations are increasing.
Concentrations over 2L have been observed in samples from 1,1-dichloroethane,
1,2-dichloropropane, benzene, tetrachloroethene and trichloroethene with
increasing trends over the past few years for these parameters. Additional
investigation into the MW-16A area will be needed to determine the most cost
effective remedial strategy for this area. No adjustments to the selected remedy
are proposed until further investigation has been completed.

Halifax County Corrective Action Evaluation Report
September 2017 Page 12
3.1.6 Downgradient Contamination (Monitored Natural Attenuation)
Downgradient of the landfill, groundwater exhibits concentrations of constituents
of concern above the 2L standard in the unconfined, shallow aquifer. Natural
attenuation mechanisms are actively controlling COC movement in this area. The
following are the proposed updates to the existing sampling parameters and the
sampling schedule.

1. GP-13 will not be sampled for MNA parameters due to no detections
above MDL in two years.
3. Sampling will continue as approved in the 2012 CAER for the remaining
downgradient locations.

An updated sampling schedule is provided as Table 6.
3.2 Contingency Plan
At this juncture the contingency plan presented in the CAP does not need to be
implemented; however, additional investigation for the upgradient area near MW-16A is
warranted. This investigation will be performed and submitted to NCDEQ under
separate cover. The recent data indicates a reduction in total VOC concentrations and
Biochlor models utilizing MNA parameters indicate natural attenuation is on-going. If
triggers described in the CAP occur additional alternatives may be presented to the SWS
for approval as necessary.

Halifax County Corrective Action Evaluation Report
September 2017 Page 13
4.0 CONCLUSION
4.3 Evaluation of Effectiveness
Certain changes in the physical and chemical characteristics of the contaminant plume
should occur as remediation progresses. Contaminant concentrations are expected to
exhibit decreasing trends over the remediation period, resulting in a decrease in the
physical extent of the plume. Over the sampling period reductions in total VOCs have
been observed.

Upgradient PlumeAOC
Installation of a trench and solar vent flares in conjunction with natural attenuation
processes have been effective and will continue to reduce total VOC concentrations for
the MW-15R area. The MW-16A area requires additional evaluation to determine the
appropriate response to reduce VOCs in this AOC near this well. Monitoring will
continue to track contaminant concentrations in the upgradient AOC. A report of
additional investigation in the MW-16A area with suggestions for additional actions, as
needed, will be submitted to NCDEQ for review and approval upon further evaluation of
landfill gas migration in this area.

Downgradient PlumeAOC
The contaminant plume is delineated by Brewers Creek downgradient of the facility.
Impacted wells show continued, steady decreases in VOC concentrations, with minimal
effect on groundwater chemistry. Monitoring will continue to track contaminant
reductions in the downgradient AOC. Natural attenuation is ongoing and will continue.
4.4 Report Submittals
Brief status updates regarding the remediation efforts will be submitted within the
semi-annual groundwater sampling reports. Their purpose is to keep the SWS informed
on the remediation progress and aware of situations that may require amendments to
the current CAP. Text, tables, pictures, etc. may be used to illustrate the existing site
conditions. Proposed changes to the sampling or remediation plan will be submitted to
NCDEQ for approval as applicable. CAER updates will be submitted at five year intervals
in accordance with the rule, until corrective action is complete. As stated above, a
report our investigation of landfill gas migration in the area of MW-16A will also be
submitted to NCDEQ.
4.5 Completeness of Corrective Action
Reduction of low-level contamination at the Halifax County landfill is being achieved
through natural attenuation and active or passive landfill gas recovery. Institutional
controls limit access to the site. The source area has been capped to limit infiltration
and continued disposal of C&D waste has allowed for better site topography and
drainage which enhances storm water run-off.

Halifax County Corrective Action Evaluation Report
September 2017 Page 14

The corrective action remedial strategies shall remain in place until remedial goals have
been met. The remedial goals for this site are contaminant concentrations that do not
exceed the 2L groundwater standards, SWS groundwater protection standards, or, if no
standard exists, EPA MCLs. If the current remedial strategies prove to be inadequate,
alternative remedial strategies should be developed. At that time, alternative corrective
action goals may be set (with the approval of NCDEQ).

FIGURES

Corrective Action Evaluation Report Update
Halifax County
Halifax, North Carolina

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PROJECT TITLE:DRAWING TITLE:REV.DATEDESCRIPTIONDESIGNED:DRAWN:APPROVED:PROJECT NO:SCALE:FILENAME:PREPARED BY:PREPARED FOR:SHEET NUMBER:DRAWING NUMBER:DATE:G:\CAD\Halifax\Halifax 17-4\sheets\HALI-D0315.dwg - 7/21/2017 10:17 AM
SEALSEALSMITHGARDNERENGINEERS+14 N. Boylan Avenue, Raleigh NC 27603NC LIC. NO. F-1370 (ENGINEERING)919.828.0577Electronic files are instruments of service provided by SmithGardner, Inc. for the convenience of the intended recipient(s), andno warranty is either expressed or implied.  Any reuse orredistribution of this document in whole or part without thewritten authorization of Smith Gardner, Inc., will be at the solerisk of the recipient.  If there is a discrepancy between theelectronic files and the signed and sealed hard copies, the hardcopies shall govern.  Use of  any electronic files generated orprovided by Smith Gardner, Inc., constitutes an acceptance ofthese terms and conditions.© 2017 Smith Gardner, Inc.HALIFAX COUNTYNORTH CAROLINADEPARTMENT OFPUBLIC UTILITIESHALIFAX COUNTYCORRECTIVE ACTIONEVALUATION REPORT UPDATETOPOGRAPHIC MAPM.M.G.C.T.J.HALIFAX 17-4AS SHOWNJULY 2017HALI-D0315FIG.1PERMITTED FACILITY BOUNDARYCLOSED C&D LANDFILL UNITCLOSED MSW LANDFILL UNITASH MONOFILL UNITPROPOSED C&D LANDFILL UNIT (AREA 2)CURRENT C&D LANDFILL UNIT (AREA 1)
This page intentionally left blank.
DRAWN:APPROVED:SCALE:DATE:PROJECT NO.:FIGURE NO.:FILE NAME:
PREPARED FOR:PREPARED BY:
SMITH
14 N. Boylan Avenue, Raleigh NC 27603
NC LIC. NO. F-1370 (ENGINEERING)
919.828.0577
GARDNER+G:\CAD\Halifax\Halifax 17-4\sheets\HALI-A0316.dwg - 7/21/2017 10:36 AM© 2017 Smith Gardner, Inc.
HALIFAX COUNTY LANDFILL
CORRECTIVE ACTION EVALUATION
REPORT UPDATE
SITE LOCATION MAP
C.T.J.M.M.G.AS SHOWN HALIFAX 17-4 2 HALI-A0316Jul 2017
PERMITTED FACILITY
BOUNDARY
ASH MONOFILL UNIT
PROPOSED C&D
LANDFILL UNIT
(AREA 2)
OLD C&D
LANDFILL UNIT
CURRENT C&D
LANDFILL UNIT
(AREA 1)
CLOSED MSW
LANDFILL UNIT
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MW-2AD
TOC=245.65
DTW=6.25
GWE=239.40
MW-6D
TOC=253.22
DTW=12.51
GWE=240.71
MW-7D
TOC=249.09
DTW=3.72
GWE=245.37
MW-15R
TOC=299.78
DTW=31.20
GWE=268.58
MW-16A
TOC=271.46
DTW=6.50
GWE=264.96
BP-3
TOC=300.50
DTW=30.69
GWE=269.81
BP-9
TOC=303.48
DTW=27.84
GWE=275.64
MW-17
TOC=247.75
DTW=6.85
GWE=240.90MW-18sTOC=244.52
DTW=5.80
GWE=238.72
MW-18d
TOC=244.04
DTW=5.40
GWE=238.64
MW-2ATOC=246.43
DTW=6.90
GWE=239.53
MW-3D
TOC=251.73
DTW=9.78
GWE=241.95
MW-3AS
TOC=251.57
DTW=10.20
GWE=241.26
G:\CAD\Halifax\Halifax 17-4\sheets\HALI-B0317.dwg - 7/21/2017 3:48 PMDRAWN:APPROVED:PROJECT NO:SCALE:FILENAME:DATE:FIGURE NO.PREPARED BY:PREPARED FOR:SMITH14 N. Boylan Avenue, Raleigh NC 27603NC LIC. NO. F-1370 (ENGINEERING)919.828.0577GARDNER+© 2017 Smith Gardner, Inc.HALIFAX COUNTYCLOSED MSW LANDFILLPOTENTIOMETRIC SURFACE MAPFEBRUARY 2017J.A.L.M.M.G.AS SHOWN3Jul 2017HALIFAX 17-4HALI-B0317MW-10
MW-1
TOC=
DTW=
GWE=
BP-3
G:\CAD\Halifax\Halifax 17-4\sheets\HALI-B0317.dwg - 9/25/2017 2:03 PMDRAWN:APPROVED:PROJECT NO:SCALE:FILENAME:DATE:FIGURE NO.PREPARED BY:PREPARED FOR:SMITH14 N. Boylan Avenue, Raleigh NC 27603NC LIC. NO. F-1370 (ENGINEERING)919.828.0577GARDNER+© 2017 Smith Gardner, Inc.HALIFAX COUNTYCLOSED MSW LANDFILLDETECTIONS ABOVE THE 2L STANDARDFEBRUARY 2017C.T.J.M.M.G.AS SHOWN4Sep 2017HALIFAX 17-4HALI-B0317
PROJECT TITLE:DRAWING TITLE:REV.DATEDESCRIPTIONDESIGNED:DRAWN:APPROVED:PROJECT NO:SCALE:FILENAME:PREPARED BY:PREPARED FOR:SHEET NUMBER:DRAWING NUMBER:DATE:G:\CAD\Halifax\Halifax 17-4\sheets\HALI-D0318.dwg - 8/17/2017 5:23 PM
SEALSEALSMITHGARDNERENGINEERS+14 N. Boylan Avenue, Raleigh NC 27603NC LIC. NO. F-1370 (ENGINEERING)919.828.0577Electronic files are instruments of service provided by SmithGardner, Inc. for the convenience of the intended recipient(s), andno warranty is either expressed or implied.  Any reuse orredistribution of this document in whole or part without thewritten authorization of Smith Gardner, Inc., will be at the solerisk of the recipient.  If there is a discrepancy between theelectronic files and the signed and sealed hard copies, the hardcopies shall govern.  Use of  any electronic files generated orprovided by Smith Gardner, Inc., constitutes an acceptance ofthese terms and conditions.© 2017 Smith Gardner, Inc.HALIFAX COUNTYNORTH CAROLINADEPARTMENT OFPUBLIC UTILITIESHALIFAX COUNTYCORRECTIVE ACTIONEVALUATION REPORT UPDATETOTAL VOCISOCONCENTRATION MAPM.M.G.C.T.J.HALIFAX 17-4AS SHOWNJLUY 2017HALI-D0318FIG.5AUGUST 2015AUGUST 2016FEBRUARY 2016FEBRUARY 201721926.624.97.322.29.894.210.21.530.942.88.527.67.21.3169.314.44.31.134.81.71.1190.715.91.11.221.12.414.9198.9
This page intentionally left blank.

TABLES

Corrective Action Evaluation Report Update
Halifax County
Halifax, North Carolina

This page intentionally left blank.

Table 1 Well Construction DetailsHalifax County CAER UpdateBy: MGDate: 7/11/17Monitoring LocationWell Installation DateLatitude LongitudeWell Diameter (inches)Total Well Depth (ft.)**Ground Surface Elevation (ft. amsl)TOC Elevation (ft)Depth to Water (ft)Water Table Elevation (ft)Screen Interval (ft. bgs)Screen GeologyMW-1* NA 36.3804 77.8143 2 46.51 321.18323.18 Ф28.00 294.96 NA NAMW-2A 07/26/1995 36.3731 77.8141 2 16.91 246.43 246.43 6.90 239.53 4-14 Silt & SandMW-2AD 09/01/1999 36.3732 77.8140 2 41.20 245.65 245.65 6.25 239.40 30 - 40Coarse Sandy PWRMW-3AS 07/25/1995 36.3723 77.8134 2 22.29 248.57251.57 Ф10.20 241.26 9-19Clayey Silty SandMW-3D NA 36.3723 77.8134 2 52.20 251.73 251.73 9.78 241.95 NA NAMW-6D 10/30/1991 36.3742 77.8144 2 42.00 253.22 253.22 12.51 240.7125 - 40Sandy SiltMW-7D 10/31/1991 36.3751 77.8137 2 39.40 249.09 249.09 3.72 245.3725 - 40Sandy SiltMW-15R 08/31/1999 36.3744 77.8106 2 46.15 299.78 299.78 31.20 268.58 33 - 43Sandy Clayey SiltMW-16A 07/26/1995 36.3715 77.8111 2 22.23 271.46 271.46 6.50 264.96 5 - 15 Clayey SandMW-17 10/03/2007 36.3726 77.8138 2 27.31 247.75 247.75 6.85 240.90 15 - 25 SaproliteMW-18S 10/16/2007 36.3730 77.8144 2 20.21 244.52 244.52 5.80 238.72 8-18Clayey Sand/SaproliteMW-18D 10/17/2007 36.3731 77.8145 2 54.90 244.04 244.04 5.40 238.6447 - 52 GraniteBP-3 NA 36.3732 77.8102 2 NM NA 300.50 30.69 269.81 NA NABP-9 NA 36.3750 77.8094 2 NM NA 303.48 27.84 275.64 NA NANOTE:1.) *MW-1 is not used in the groundwater characterization calculations due to its remote location from the landfill2.) ** Well depth from Environment 1 03/29/2017 Report client ID#60153.)Ф3' stickup estimated, therefore groundwater elevation is also estimated4.) NA = Not Available5.) NM = Not Measured
Table 2 Historic Groundwater Elevation DataHalifax County CAER UpdateBy: WWDate: 7/11/2017Well 2/6/2001 8/28/2001 2/7/2002 8/14/2002 2/13/2003 8/7/2003 2/24/2004 08/12/04 2/16/2005 8/16/2005 2/14/2006 8/22/2006MW-1 -- -- -- -- -- -- -- -- -- -- -- --MW-2a 241.24 241.32 241.47 240.96 241.68 241.49 241.04 241.28 241.55 241.22 241.59 241.21MW-2ad 240.86 240.91 241.14 240.52 241.38 241.11 240.83 240.94 241.24 240.86 241.25 240.87MW-3a 243.47 243.55 243.98 243.39 244.51 244.03 243.11 243.66 244.11 243.72 244.18 243.49MW-3d 243.28 243.35 243.81 243.23 244.29 243.78 242.80 243.39 243.87 243.45 243.91 243.25MW-6d 240.57 240.28 240.92 240.22 241.57 241.19 241.66 241.02 241.68 240.90 241.45 240.87MW-7d 245.09 244.57 245.11 244.22 245.79 245.35 246.35 245.95 245.99 245.30 245.84 245.10MW-15r268.71 263.10 267.59 266.45 269.01 274.18 271.02 269.29 270.03 268.33 268.41 269.20MW-16a 265.97 265.02 265.67 263.55 267.20 268.11 267.12 265.98 266.64 265.09 266.15 264.85MW-17 -- -- -- -- -- -- -- -- -- -- -- --MW-18s -- -- -- -- -- -- -- -- -- -- -- --MW-18d -- -- -- -- -- -- -- -- -- -- -- --BP-3 179.80 -- -- -- -- -- -- -- -- -- -- 285.97BP-9 -- -- -- -- -- -- -- -- 284.72 280.55 265.09 278.21Well 2/14/2007 8/9/2007 2/19/2008 11/0/2008 2/17/2009 8/25/2009 2/17/2010 8/24/2010 2/22/2011 8/24/2011 2/20/2012 2/20/2013MW-1 -- -- -- -- -- -- -- -- -- -- -- --MW-2a 241.73 241.26 241.18 240.77 240.92 241.18 241.31 241.18 241.64 241.41 241.79 229.52MW-2ad 241.47 240.90 240.90 242.46 240.93 240.80 241.07 240.80 241.24 240.87 241.33 204.45MW-3a 244.33 243.78 243.48 242.97 243.82 243.74 243.63 243.74 244.22 -- -- --MW-3d 243.95 243.56 243.16 242.73 243.49 243.40 243.36 243.40 243.89 243.74 244.29 199.53MW-6d 241.87 240.99 241.33 240.78 241.07 240.46 241.60 240.46 241.24 240.17 241.11 211.22MW-7d 246.32 245.14 245.65 244.95 245.39 244.84 246.19 244.84 245.73 244.45 216.11 209.86MW-15r273.14 270.24 268.06 272.43 269.55 267.78 269.87 267.78 266.08 266.33 -- 253.35MW-16a 268.07 265.04 265.30 265.29 264.99 263.39 266.72 263.39 264.30 262.30 264.87 249.31MW-17 -- -- 242.43 242.12 243.03 243.03 242.50 243.03 243.51 243.53 243.91 220.77MW-18s -- -- 239.47 239.79 240.16 239.97 240.29 239.97 240.11 239.98 240.36 224.52MW-18d -- -- 240.02 239.58 239.95 -- 240.17 -- 240.08 -- 240.09 188.8BP-3 289.58 287.19 285.85 289.16 285.91 284.11 286.08 284.11 282.89 282.99 -- -BP-9 280.67 275.92 272.57 273.84 272.15 272.88 275.25 272.88 271.82 269.63 -- -Well 8/29/2013 2/25/2014 8/6/2014 2/11/2015 8/26/2015 2/9/2016 8/11/2016 2/14/2017MW-1 -- -- -- 295.04 294.96 294.96 294.96 294.96MW-2a 241.09 241.54 240.72 241.3 239.62 240.58 239.43 239.53MW-2ad 240.65 241.24 240.48 240.96 239.24 240.54 234.25 239.40MW-3a -- -- -- 242.67 241.26 241.26 241.26 241.26MW-3d 242.89 243.83 243.03 243.36 242.01 242.78 241.71 241.95MW-6d 240.72 241.45 240.63 241.6 239.62 241.69 240.22 240.71MW-7d 245.05 245.99 245.29 245.95 244.14 246.19 245.16 245.37MW-15r268.27 270.08 270.14 271.58 267.02 272.30 270.10 268.58MW-16a 264.45 266.13 265.20 266.32 263.46 267.24 265.30 264.96MW-17 242.46 243.25 242.24 242.6 241.45 241.49 240.57 240.90MW-18s 239.94 240.40 239.82 240.18 238.39 239.66 238.59 238.72MW-18d - - - 239.93 - 239.54 - 238.64BP-3 - - - 272.76 268.14 273.35 271.50 269.81BP-9 - - - 280.12 275.46 279.44 278.54 275.64
Table 2 Historic Groundwater Elevation DataHalifax County CAER UpdateBy: WWDate: 7/11/2017WellObserved HighObserved LowDifference AverageMW-1 295.04 294.96 0.08 294.98MW-2a 241.79 229.52 12.27 240.74 Measurements reported in feet above mean sea levelMW-2ad 242.46 204.45 38.01 239.56 Measurements collected from top of casing.MW-3a 244.51 241.26 3.25 243.33 NA indicates water level measurement not collected during this event.MW-3d 244.29 199.53 44.76 241.95MW-6d 241.87 211.22 30.65 240.04MW-7d 246.35 209.86 36.49 243.35MW-15r274.18 253.35 20.83 268.65MW-16a 268.11 249.31 18.80 264.92MW-17 243.91 220.77 23.14 241.27MW-18s 240.40 224.52 15.88 238.91MW-18d 240.17 188.80 51.37 234.68BP-3 289.58 179.80 109.78 275.25BP-9 284.72 265.09 19.63 275.55
Table 3Gradient and Velocity CalculationsHalifax County CAER UpdateBy: MGDate: 4/11/2017Monitoring LocationWater Table Elevation (ft)Hydraulic Conductivity (ft/day)Assumed PorosityHydraulic Gradient (ft/ft)Groundwater Velocity (ft/day)MW-2A 239.53 1.835 0.2 0.016 0.147MW-16A 264.96 0.057 0.2 0.001 3.26E-04NOTE:Hydraulic Conductivity data from slug tests performed by G.N. Richardson and Associates in 1997.Porosity values assumed from Groundwater & Wells (Driscoll)Velocity Calculated from V=K*i/nV = velocityK = Hydraulic Conductivityi = Gradientn = PorosityDeep wells not used in velocity calculationsHydraulic Gradient measured based on February 2017 Contours
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
G-13 64-19-7 Acetic Acid 56 ug/l NE NE 2/11/2015
G-13 64-19-7 Acetic Acid 42 ug/l NE NE 8/26/2015
G-13 107-92-6 Butyric Acid 17 ug/l NE NE 8/26/2015
G-13 124-38-9 Carbon Dioxide 79000 ug/l NE 1000 8/25/2010
G-13 124-38-9 Carbon Dioxide 76000 ug/l NE 1000 8/25/2011
G-13 124-38-9 Carbon Dioxide 101000 ug/l NE 1000 8/30/2012
G-13 124-38-9 Carbon Dioxide 47000 ug/l NE 1000 2/11/2015
G-13 124-38-9 Carbon Dioxide 82000 ug/l NE 1000 8/26/2015
G-13 16887-00-6 Chloride 14000 ug/l 250000 5000 8/25/2010
G-13 16887-00-6 Chloride 10000 ug/l 250000 5000 8/25/2011
G-13 16887-00-6 Chloride 12000 ug/l 250000 5000 8/30/2012
G-13 16887-00-6 Chloride 11000 ug/l 250000 5000 8/29/2013
G-13 16887-00-6 Chloride 7000 ug/l 250000 5000 8/6/2014
G-13 16887-00-6 Chloride 7000 ug/l 250000 5000 8/26/2015
G-13 74-84-0 Ethane 0.0018 ug/l NE NE 2/11/2015
G-13 74-84-0 Ethane 0.0043 ug/l NE NE 8/26/2015
G-13 74-85-1 Ethene 0.026 ug/l NE NE 8/25/2011
G-13 74-85-1 Ethene 0.043 ug/l NE NE 8/30/2012
G-13 74-85-1 Ethene 0.012 ug/l NE NE 8/26/2015
G-13 1333-74-0 Hydrogen 2.7 nM NE NE 8/25/2011
G-13 1333-74-0 Hydrogen 3.9 nM NE NE 8/30/2012
G-13 1333-74-0 Hydrogen 1.2 nM NE NE 2/11/2015
G-13 1333-74-0 Hydrogen 2.6 nM NE NE 8/26/2015
G-13 50-21-5 Lactic Acid 110 ug/l NE NE 2/11/2015
G-13 74-82-8 Methane 30 ug/l NE NE 8/25/2011
G-13 74-82-8 Methane 42 ug/l NE NE 8/30/2012
G-13 74-82-8 Methane 3.9 ug/l NE NE 2/11/2015
G-13 74-82-8 Methane 1.4 ug/l NE NE 8/26/2015
G-13 79-09-4 Propionic Acid 52 ug/l NE NE 8/25/2011
MW-1 78-93-3 2-Butanone (Methyl ethyl ketone) 1.8 ug/l 4000 100 2/7/2002
MW-1 78-93-3 2-Butanone (Methyl ethyl ketone) 1.8 ug/l 4000 100 8/9/2007
MW-1 78-93-3 2-Butanone (Methyl ethyl ketone) 4.4 ug/l 4000 100 8/19/2008
MW-1 67-64-1 Acetone 2.2 ug/l 6000 100 2/19/2008
MW-1 67-64-1 Acetone 5.7 ug/l 6000 100 8/19/2008
MW-1 117-81-7 Bis-(2-Ethylhexyl) Phthalate 33 ug/l 3 15 2/25/1997
MW-1 117-81-7 Bis-(2-Ethylhexyl) Phthalate 60 ug/l 3 15 2/25/1999
MW-1 74-87-3 Chloromethane 0.3 ug/l 3 1 8/19/2008
MW-1 7439-97-6 Mercury 0.6 ug/l 1 0.2 8/9/1995
MW-1 108-88-3 Toluene 0.4 ug/l 600 1 2/7/2002
MW-1 108-88-3 Toluene 0.4 ug/l 600 1 8/9/2007
MW-1 108-88-3 Toluene 0.3 ug/l 600 1 2/19/2008
MW-15 71-55-6 1,1,1-Trichloroethane 6 ug/l 200 1 12/4/1995
MW-15 71-55-6 1,1,1-Trichloroethane 6 ug/l 200 1 2/15/1996
MW-15 75-34-3 1,1-Dichloroethane 76 ug/l 6 5 9/26/1994
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-15 75-34-3 1,1-Dichloroethane 68 ug/l 6 5 10/31/1994
MW-15 75-34-3 1,1-Dichloroethane 73 ug/l 6 5 1/9/1995
MW-15 75-34-3 1,1-Dichloroethane 96 ug/l 6 5 3/17/1995
MW-15 75-34-3 1,1-Dichloroethane 64 ug/l 6 5 8/9/1995
MW-15 75-34-3 1,1-Dichloroethane 75 ug/l 6 5 12/4/1995
MW-15 75-34-3 1,1-Dichloroethane 76 ug/l 6 5 2/15/1996
MW-15 75-34-3 1,1-Dichloroethane 66 ug/l 6 5 8/8/1996
MW-15 75-34-3 1,1-Dichloroethane 78 ug/l 6 5 2/25/1997
MW-15 75-34-3 1,1-Dichloroethane 68 ug/l 6 5 8/18/1997
MW-15 75-34-3 1,1-Dichloroethane 73 ug/l 6 5 2/2/1998
MW-15 75-34-3 1,1-Dichloroethane 45 ug/l 6 5 9/10/1998
MW-15 75-34-3 1,1-Dichloroethane 56 ug/l 6 5 2/25/1999
MW-15 75-34-3 1,1-Dichloroethane 40.7 ug/l 6 5 10/7/1999
MW-15 75-34-3 1,1-Dichloroethane 37 ug/l 6 5 2/2/2000
MW-15 75-34-3 1,1-Dichloroethane 49 ug/l 6 5 8/10/2000
MW-15 75-35-4 1,1-Dichloroethene 8 ug/l 7 5 2/25/1997
MW-15 120-82-1 1,2,4-Trichlorobenzene 20 ug/l 70 10 8/9/1995
MW-15 120-82-1 1,2,4-Trichlorobenzene 33 ug/l 70 10 12/4/1995
MW-15 95-50-1 1,2-Dichlorobenzene 5.6 ug/l 20 5 2/2/2000
MW-15 78-87-5 1,2-Dichloropropane 52 ug/l 0.6 1 1/9/1995
MW-15 78-87-5 1,2-Dichloropropane 70 ug/l 0.6 1 3/17/1995
MW-15 78-87-5 1,2-Dichloropropane 33 ug/l 0.6 1 2/2/1998
MW-15 106-46-7 1,4-Dichlorobenzene 9.5 ug/l 6 1 8/18/1997
MW-15 106-46-7 1,4-Dichlorobenzene 14 ug/l 6 1 2/2/1998
MW-15 106-46-7 1,4-Dichlorobenzene 11 ug/l 6 1 9/10/1998
MW-15 106-46-7 1,4-Dichlorobenzene 17 ug/l 6 1 2/25/1999
MW-15 106-46-7 1,4-Dichlorobenzene 18.2 ug/l 6 1 10/7/1999
MW-15 106-46-7 1,4-Dichlorobenzene 23 ug/l 6 1 2/2/2000
MW-15 106-46-7 1,4-Dichlorobenzene 12 ug/l 6 1 8/10/2000
MW-15 309-00-2 Aldrin 0.06 ug/l 0.002 0.05 2/2/1998
MW-15 319-84-6 Alpha-BHC 0.125 ug/l 0.006 0.05 8/10/2000
MW-15 71-43-2 Benzene 8 ug/l 1 1 1/9/1995
MW-15 71-43-2 Benzene 9 ug/l 1 1 3/17/1995
MW-15 71-43-2 Benzene 8 ug/l 1 1 12/4/1995
MW-15 71-43-2 Benzene 9 ug/l 1 1 2/15/1996
MW-15 71-43-2 Benzene 9 ug/l 1 1 8/8/1996
MW-15 71-43-2 Benzene 19 ug/l 1 1 2/25/1997
MW-15 71-43-2 Benzene 12 ug/l 1 1 8/18/1997
MW-15 71-43-2 Benzene 13 ug/l 1 1 2/2/1998
MW-15 71-43-2 Benzene 11 ug/l 1 1 9/10/1998
MW-15 71-43-2 Benzene 15 ug/l 1 1 2/25/1999
MW-15 71-43-2 Benzene 15 ug/l 1 1 10/7/1999
MW-15 71-43-2 Benzene 16 ug/l 1 1 2/2/2000
MW-15 71-43-2 Benzene 14 ug/l 1 1 8/10/2000
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-15 319-85-7 Beta-BHC 0.65 ug/l 0.019 0.05 10/7/1999
MW-15 319-85-7 Beta-BHC 0.73 ug/l 0.019 0.05 2/2/2000
MW-15 117-81-7 Bis-(2-Ethylhexyl) Phthalate 21 ug/l 3 15 2/25/1997
MW-15 117-81-7 Bis-(2-Ethylhexyl) Phthalate 76 ug/l 3 15 2/25/1999
MW-15 75-00-3 Chloroethane 25 ug/l 3000 10 9/26/1994
MW-15 75-00-3 Chloroethane 25 ug/l 3000 10 10/31/1994
MW-15 75-00-3 Chloroethane 20 ug/l 3000 10 1/9/1995
MW-15 75-00-3 Chloroethane 19 ug/l 3000 10 3/17/1995
MW-15 75-00-3 Chloroethane 12 ug/l 3000 10 8/9/1995
MW-15 75-00-3 Chloroethane 20 ug/l 3000 10 12/4/1995
MW-15 75-00-3 Chloroethane 20 ug/l 3000 10 2/15/1996
MW-15 75-00-3 Chloroethane 17 ug/l 3000 10 8/8/1996
MW-15 75-00-3 Chloroethane 13 ug/l 3000 10 8/18/1997
MW-15 75-00-3 Chloroethane 11.9 ug/l 3000 10 2/2/1998
MW-15 75-00-3 Chloroethane 11 ug/l 3000 10 2/25/1999
MW-15 75-00-3 Chloroethane 12.6 ug/l 3000 10 10/7/1999
MW-15 156-59-2 Cis-1,2-Dichloroethene 29 ug/l 70 5 10/31/1994
MW-15 156-59-2 Cis-1,2-Dichloroethene 34 ug/l 70 5 3/17/1995
MW-15 156-59-2 Cis-1,2-Dichloroethene 28 ug/l 70 5 8/9/1995
MW-15 156-59-2 Cis-1,2-Dichloroethene 26 ug/l 70 5 12/4/1995
MW-15 156-59-2 Cis-1,2-Dichloroethene 40 ug/l 70 5 2/15/1996
MW-15 156-59-2 Cis-1,2-Dichloroethene 41 ug/l 70 5 8/8/1996
MW-15 156-59-2 Cis-1,2-Dichloroethene 67 ug/l 70 5 2/25/1997
MW-15 156-59-2 Cis-1,2-Dichloroethene 60 ug/l 70 5 8/18/1997
MW-15 156-59-2 Cis-1,2-Dichloroethene 62 ug/l 70 5 2/2/1998
MW-15 156-59-2 Cis-1,2-Dichloroethene 48 ug/l 70 5 9/10/1998
MW-15 156-59-2 Cis-1,2-Dichloroethene 62 ug/l 70 5 2/25/1999
MW-15 156-59-2 Cis-1,2-Dichloroethene 61 ug/l 70 5 10/7/1999
MW-15 156-59-2 Cis-1,2-Dichloroethene 52 ug/l 70 5 2/2/2000
MW-15 156-59-2 Cis-1,2-Dichloroethene 70 ug/l 70 5 8/10/2000
MW-15 319-86-8 Delta-BHC 0.058 ug/l 0.019 0.05 2/2/2000
MW-15 88-85-7 Dinoseb 1.7 ug/l 7 1 8/10/2000
MW-15 100-41-4 Ethylbenzene 75 ug/l 600 1 9/26/1994
MW-15 100-41-4 Ethylbenzene 10 ug/l 600 1 1/9/1995
MW-15 100-41-4 Ethylbenzene 7 ug/l 600 1 12/4/1995
MW-15 100-41-4 Ethylbenzene 11 ug/l 600 1 8/18/1997
MW-15 100-41-4 Ethylbenzene 7.5 ug/l 600 1 2/2/1998
MW-15 100-41-4 Ethylbenzene 8.2 ug/l 600 1 2/25/1999
MW-15 100-41-4 Ethylbenzene 10.6 ug/l 600 1 10/7/1999
MW-15 100-41-4 Ethylbenzene 19 ug/l 600 1 2/2/2000
MW-15 100-41-4 Ethylbenzene 5.5 ug/l 600 1 8/10/2000
MW-15 7439-97-6 Mercury 0.8 ug/l 1 0.2 2/2/2000
MW-15 75-09-2 Methylene Chloride 305 ug/l 5 1 9/26/1994
MW-15 75-09-2 Methylene Chloride 329 ug/l 5 1 10/31/1994
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-15 75-09-2 Methylene Chloride 353 ug/l 5 1 1/9/1995
MW-15 75-09-2 Methylene Chloride 371 ug/l 5 1 3/17/1995
MW-15 75-09-2 Methylene Chloride 350 ug/l 5 1 8/9/1995
MW-15 75-09-2 Methylene Chloride 354 ug/l 5 1 12/4/1995
MW-15 75-09-2 Methylene Chloride 269 ug/l 5 1 8/8/1996
MW-15 75-09-2 Methylene Chloride 258 ug/l 5 1 2/25/1997
MW-15 75-09-2 Methylene Chloride 184 ug/l 5 1 8/18/1997
MW-15 75-09-2 Methylene Chloride 109 ug/l 5 1 2/2/1998
MW-15 75-09-2 Methylene Chloride 120 ug/l 5 1 2/25/1999
MW-15 75-09-2 Methylene Chloride 157 ug/l 5 1 10/7/1999
MW-15 75-09-2 Methylene Chloride 136 ug/l 5 1 8/10/2000
MW-15 127-18-4 Tetrachloroethene 21 ug/l 0.7 1 10/31/1994
MW-15 127-18-4 Tetrachloroethene 22 ug/l 0.7 1 3/17/1995
MW-15 127-18-4 Tetrachloroethene 20 ug/l 0.7 1 8/9/1995
MW-15 127-18-4 Tetrachloroethene 29 ug/l 0.7 1 12/4/1995
MW-15 127-18-4 Tetrachloroethene 22 ug/l 0.7 1 2/15/1996
MW-15 127-18-4 Tetrachloroethene 7 ug/l 0.7 1 8/8/1996
MW-15 127-18-4 Tetrachloroethene 5.9 ug/l 0.7 1 8/18/1997
MW-15 127-18-4 Tetrachloroethene 9.5 ug/l 0.7 1 2/2/1998
MW-15 127-18-4 Tetrachloroethene 6.4 ug/l 0.7 1 2/25/1999
MW-15 127-18-4 Tetrachloroethene 5.6 ug/l 0.7 1 10/7/1999
MW-15 127-18-4 Tetrachloroethene 5.3 ug/l 0.7 1 2/2/2000
MW-15 127-18-4 Tetrachloroethene 5.7 ug/l 0.7 1 8/10/2000
MW-15 108-88-3 Toluene 605 ug/l 600 1 9/26/1994
MW-15 108-88-3 Toluene 500 ug/l 600 1 10/31/1994
MW-15 108-88-3 Toluene 77 ug/l 600 1 1/9/1995
MW-15 108-88-3 Toluene 31 ug/l 600 1 3/17/1995
MW-15 108-88-3 Toluene 50 ug/l 600 1 8/9/1995
MW-15 108-88-3 Toluene 33 ug/l 600 1 12/4/1995
MW-15 108-88-3 Toluene 18 ug/l 600 1 2/15/1996
MW-15 108-88-3 Toluene 8 ug/l 600 1 8/8/1996
MW-15 108-88-3 Toluene 25 ug/l 600 1 2/25/1997
MW-15 108-88-3 Toluene 9.8 ug/l 600 1 8/18/1997
MW-15 108-88-3 Toluene 7 ug/l 600 1 2/2/1998
MW-15 108-88-3 Toluene 13 ug/l 600 1 9/10/1998
MW-15 108-88-3 Toluene 19 ug/l 600 1 2/25/1999
MW-15 108-88-3 Toluene 16 ug/l 600 1 10/7/1999
MW-15 108-88-3 Toluene 56 ug/l 600 1 2/2/2000
MW-15 108-88-3 Toluene 9.4 ug/l 600 1 8/10/2000
MW-15 79-01-6 Trichloroethene 62 ug/l 3 1 9/26/1994
MW-15 79-01-6 Trichloroethene 50 ug/l 3 1 10/31/1994
MW-15 79-01-6 Trichloroethene 50 ug/l 3 1 8/9/1995
MW-15 79-01-6 Trichloroethene 64 ug/l 3 1 12/4/1995
MW-15 79-01-6 Trichloroethene 70 ug/l 3 1 2/15/1996
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-15 79-01-6 Trichloroethene 44 ug/l 3 1 8/8/1996
MW-15 79-01-6 Trichloroethene 49 ug/l 3 1 2/25/1997
MW-15 79-01-6 Trichloroethene 28 ug/l 3 1 8/18/1997
MW-15 79-01-6 Trichloroethene 20 ug/l 3 1 9/10/1998
MW-15 79-01-6 Trichloroethene 24 ug/l 3 1 2/25/1999
MW-15 79-01-6 Trichloroethene 22 ug/l 3 1 10/7/1999
MW-15 79-01-6 Trichloroethene 18 ug/l 3 1 2/2/2000
MW-15 79-01-6 Trichloroethene 29 ug/l 3 1 8/10/2000
MW-15 1330-20-7 Xylenes 189 ug/l 500 5 9/26/1994
MW-15 1330-20-7 Xylenes 197 ug/l 500 5 10/31/1994
MW-15 1330-20-7 Xylenes 86 ug/l 500 5 1/9/1995
MW-15 1330-20-7 Xylenes 152 ug/l 500 5 3/17/1995
MW-15 1330-20-7 Xylenes 130 ug/l 500 5 8/9/1995
MW-15 1330-20-7 Xylenes 95 ug/l 500 5 12/4/1995
MW-15 1330-20-7 Xylenes 139 ug/l 500 5 2/15/1996
MW-15 1330-20-7 Xylenes 61 ug/l 500 5 8/8/1996
MW-15 1330-20-7 Xylenes 121 ug/l 500 5 2/25/1997
MW-15 1330-20-7 Xylenes 130 ug/l 500 5 8/18/1997
MW-15 1330-20-7 Xylenes 146 ug/l 500 5 2/2/1998
MW-15 1330-20-7 Xylenes 48 ug/l 500 5 9/10/1998
MW-15 1330-20-7 Xylenes 64 ug/l 500 5 2/25/1999
MW-15 1330-20-7 Xylenes 75.5 ug/l 500 5 10/7/1999
MW-15 1330-20-7 Xylenes 126 ug/l 500 5 2/2/2000
MW-15 1330-20-7 Xylenes 68 ug/l 500 5 8/10/2000
MW-15R 71-55-6 1,1,1-Trichloroethane 0.2 ug/l 200 1 2/7/2002
MW-15R 71-55-6 1,1,1-Trichloroethane 0.2 ug/l 200 1 8/9/2007
MW-15R 75-34-3 1,1-Dichloroethane 6.3 ug/l 6 5 2/2/2000
MW-15R 75-34-3 1,1-Dichloroethane 10 ug/l 6 5 8/10/2000
MW-15R 75-34-3 1,1-Dichloroethane 27 ug/l 6 5 2/6/2001
MW-15R 75-34-3 1,1-Dichloroethane 22 ug/l 6 5 8/7/2001
MW-15R 75-34-3 1,1-Dichloroethane 10.3 ug/l 6 5 2/7/2002
MW-15R 75-34-3 1,1-Dichloroethane 18 ug/l 6 5 2/7/2002
MW-15R 75-34-3 1,1-Dichloroethane 23.4 ug/l 6 5 8/14/2002
MW-15R 75-34-3 1,1-Dichloroethane 24 ug/l 6 5 2/12/2003
MW-15R 75-34-3 1,1-Dichloroethane 24.7 ug/l 6 5 8/7/2003
MW-15R 75-34-3 1,1-Dichloroethane 18.1 ug/l 6 5 2/24/2004
MW-15R 75-34-3 1,1-Dichloroethane 17 ug/l 6 5 8/12/2004
MW-15R 75-34-3 1,1-Dichloroethane 9.3 ug/l 6 5 2/15/2005
MW-15R 75-34-3 1,1-Dichloroethane 13 ug/l 6 5 8/16/2005
MW-15R 75-34-3 1,1-Dichloroethane 12.4 ug/l 6 5 2/14/2006
MW-15R 75-34-3 1,1-Dichloroethane 13.1 ug/l 6 5 8/22/2006
MW-15R 75-34-3 1,1-Dichloroethane 9.3 ug/l 6 5 2/14/2007
MW-15R 75-34-3 1,1-Dichloroethane 10.3 ug/l 6 5 8/9/2007
MW-15R 75-34-3 1,1-Dichloroethane 6.5 ug/l 6 5 2/19/2008
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-15R 75-34-3 1,1-Dichloroethane 4.7 ug/l 6 5 8/19/2008
MW-15R 75-34-3 1,1-Dichloroethane 6.4 ug/l 6 5 2/17/2009
MW-15R 75-34-3 1,1-Dichloroethane 8.1 ug/l 6 5 8/20/2009
MW-15R 75-34-3 1,1-Dichloroethane 5.3 ug/l 6 5 2/18/2010
MW-15R 75-34-3 1,1-Dichloroethane 7.9 ug/l 6 5 8/24/2010
MW-15R 75-34-3 1,1-Dichloroethane 9.1 ug/l 6 5 2/23/2011
MW-15R 75-34-3 1,1-Dichloroethane 7 ug/l 6 5 8/24/2011
MW-15R 75-34-3 1,1-Dichloroethane 4.1 ug/l 6 5 2/21/2012
MW-15R 75-34-3 1,1-Dichloroethane 0.5 ug/l 6 5 8/28/2012
MW-15R 75-34-3 1,1-Dichloroethane 1.4 ug/l 6 5 2/19/2013
MW-15R 75-34-3 1,1-Dichloroethane 2.9 ug/l 6 5 8/28/2013
MW-15R 75-34-3 1,1-Dichloroethane 2.4 ug/l 6 5 2/24/2014
MW-15R 75-34-3 1,1-Dichloroethane 2.2 ug/l 6 5 8/5/2014
MW-15R 75-34-3 1,1-Dichloroethane 1.3 ug/l 6 5 2/10/2015
MW-15R 75-34-3 1,1-Dichloroethane 2.9 ug/l 6 5 8/25/2015
MW-15R 75-34-3 1,1-Dichloroethane 2.6 ug/l 6 5 2/9/2016
MW-15R 75-34-3 1,1-Dichloroethane 1.7 ug/l 6 5 2/14/2017
MW-15R 107-06-2 1,2-Dichloroethane 0.6 ug/l 20 1 2/7/2002
MW-15R 107-06-2 1,2-Dichloroethane 0.6 ug/l 20 1 8/9/2007
MW-15R 107-06-2 1,2-Dichloroethane 0.4 ug/l 20 1 2/19/2008
MW-15R 107-06-2 1,2-Dichloroethane 0.4 ug/l 20 1 8/19/2008
MW-15R 107-06-2 1,2-Dichloroethane 0.5 ug/l 20 1 2/17/2009
MW-15R 107-06-2 1,2-Dichloroethane 0.6 ug/l 20 1 8/20/2009
MW-15R 107-06-2 1,2-Dichloroethane 0.5 ug/l 20 1 2/18/2010
MW-15R 107-06-2 1,2-Dichloroethane 0.7 ug/l 20 1 8/24/2010
MW-15R 107-06-2 1,2-Dichloroethane 0.8 ug/l 20 1 2/23/2011
MW-15R 107-06-2 1,2-Dichloroethane 0.6 ug/l 20 1 8/24/2011
MW-15R 107-06-2 1,2-Dichloroethane 0.4 ug/l 20 1 2/21/2012
MW-15R 106-46-7 1,4-Dichlorobenzene 10.2 ug/l 6 1 2/7/2002
MW-15R 106-46-7 1,4-Dichlorobenzene 6.7 ug/l 6 1 2/12/2003
MW-15R 106-46-7 1,4-Dichlorobenzene 8.5 ug/l 6 1 8/7/2003
MW-15R 106-46-7 1,4-Dichlorobenzene 14.7 ug/l 6 1 2/24/2004
MW-15R 106-46-7 1,4-Dichlorobenzene 10.5 ug/l 6 1 8/12/2004
MW-15R 106-46-7 1,4-Dichlorobenzene 5.7 ug/l 6 1 2/15/2005
MW-15R 106-46-7 1,4-Dichlorobenzene 9.6 ug/l 6 1 2/14/2007
MW-15R 106-46-7 1,4-Dichlorobenzene 10.2 ug/l 6 1 8/9/2007
MW-15R 106-46-7 1,4-Dichlorobenzene 10.7 ug/l 6 1 2/19/2008
MW-15R 106-46-7 1,4-Dichlorobenzene 4.1 ug/l 6 1 8/19/2008
MW-15R 106-46-7 1,4-Dichlorobenzene 5.8 ug/l 6 1 2/17/2009
MW-15R 106-46-7 1,4-Dichlorobenzene 12.3 ug/l 6 1 8/20/2009
MW-15R 106-46-7 1,4-Dichlorobenzene 6.6 ug/l 6 1 2/18/2010
MW-15R 106-46-7 1,4-Dichlorobenzene 4.2 ug/l 6 1 8/24/2010
MW-15R 93-72-1 2,4,5-TP 0.66 ug/l 50 NE 8/28/2012
MW-15R 94-75-7 2,4-D 2.04 ug/l 70 2 2/6/2001
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-15R 94-75-7 2,4-D 0.39 ug/l 70 2 2/17/2009
MW-15R 78-93-3 2-Butanone (Methyl ethyl ketone) 1.8 ug/l 4000 100 2/7/2002
MW-15R 78-93-3 2-Butanone (Methyl ethyl ketone) 1.8 ug/l 4000 100 8/9/2007
MW-15R 78-93-3 2-Butanone (Methyl ethyl ketone) 3.4 ug/l 4000 100 8/19/2008
MW-15R 67-64-1 Acetone 1.5 ug/l 6000 100 2/7/2002
MW-15R 67-64-1 Acetone 1.5 ug/l 6000 100 8/9/2007
MW-15R 67-64-1 Acetone 2.7 ug/l 6000 100 2/19/2008
MW-15R 67-64-1 Acetone 5.1 ug/l 6000 100 8/19/2008
MW-15R 319-84-6 Alpha-BHC 0.292 ug/l 0.006 0.05 2/7/2002
MW-15R 319-84-6 Alpha-BHC 0.054 ug/l 0.006 0.05 8/12/2004
MW-15R 319-84-6 Alpha-BHC 0.094 ug/l 0.006 0.05 2/14/2007
MW-15R 319-84-6 Alpha-BHC 0.292 ug/l 0.006 0.05 8/9/2007
MW-15R 319-84-6 Alpha-BHC 0.335 ug/l 0.006 0.05 2/19/2008
MW-15R 319-84-6 Alpha-BHC 0.061 ug/l 0.006 0.05 2/17/2009
MW-15R 71-43-2 Benzene 6.5 ug/l 1 1 8/7/2001
MW-15R 71-43-2 Benzene 0.3 ug/l 1 1 2/7/2002
MW-15R 71-43-2 Benzene 5.6 ug/l 1 1 2/7/2002
MW-15R 71-43-2 Benzene 8 ug/l 1 1 8/14/2002
MW-15R 71-43-2 Benzene 9 ug/l 1 1 2/12/2003
MW-15R 71-43-2 Benzene 7.2 ug/l 1 1 8/7/2003
MW-15R 71-43-2 Benzene 0.3 ug/l 1 1 8/9/2007
MW-15R 71-43-2 Benzene 0.2 ug/l 1 1 2/17/2009
MW-15R 71-43-2 Benzene 0.3 ug/l 1 1 8/20/2009
MW-15R 319-85-7 Beta-BHC 0.08 ug/l 0.019 0.05 10/7/1999
MW-15R 319-85-7 Beta-BHC 0.43 ug/l 0.019 0.05 8/12/2004
MW-15R 319-85-7 Beta-BHC 0.433 ug/l 0.019 0.05 2/15/2005
MW-15R 319-85-7 Beta-BHC 0.27 ug/l 0.019 0.05 8/16/2005
MW-15R 319-85-7 Beta-BHC 0.04 ug/l 0.019 0.05 2/18/2010
MW-15R 117-81-7 Bis-(2-Ethylhexyl) Phthalate 31 ug/l 3 15 2/7/2002
MW-15R 117-81-7 Bis-(2-Ethylhexyl) Phthalate 24 ug/l 3 15 8/22/2006
MW-15R 117-81-7 Bis-(2-Ethylhexyl) Phthalate 47 ug/l 3 15 2/14/2007
MW-15R 117-81-7 Bis-(2-Ethylhexyl) Phthalate 31 ug/l 3 15 8/9/2007
MW-15R 117-81-7 Bis-(2-Ethylhexyl) Phthalate 14.3 ug/l 3 15 8/19/2008
MW-15R 117-81-7 Bis-(2-Ethylhexyl) Phthalate 11.4 ug/l 3 15 2/18/2010
MW-15R 117-81-7 Bis-(2-Ethylhexyl) Phthalate 25 ug/l 3 15 2/23/2011
MW-15R 117-81-7 Bis-(2-Ethylhexyl) Phthalate 23 ug/l 3 15 8/24/2011
MW-15R 117-81-7 Bis-(2-Ethylhexyl) Phthalate 406 ug/l 3 15 2/19/2013
MW-15R 108-90-7 Chlorobenzene 0.2 ug/l 50 3 2/7/2002
MW-15R 108-90-7 Chlorobenzene 0.2 ug/l 50 3 8/9/2007
MW-15R 108-90-7 Chlorobenzene 0.2 ug/l 50 3 2/17/2009
MW-15R 108-90-7 Chlorobenzene 0.3 ug/l 50 3 8/20/2009
MW-15R 75-00-3 Chloroethane 0.3 ug/l 3000 10 2/7/2002
MW-15R 75-00-3 Chloroethane 0.3 ug/l 3000 10 8/9/2007
MW-15R 74-87-3 Chloromethane 0.2 ug/l 3 1 8/19/2008
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-15R 156-59-2 Cis-1,2-Dichloroethene 20 ug/l 70 5 2/6/2001
MW-15R 156-59-2 Cis-1,2-Dichloroethene 17 ug/l 70 5 8/7/2001
MW-15R 156-59-2 Cis-1,2-Dichloroethene 7.8 ug/l 70 5 2/7/2002
MW-15R 156-59-2 Cis-1,2-Dichloroethene 26 ug/l 70 5 2/7/2002
MW-15R 156-59-2 Cis-1,2-Dichloroethene 31.3 ug/l 70 5 8/14/2002
MW-15R 156-59-2 Cis-1,2-Dichloroethene 36.7 ug/l 70 5 2/12/2003
MW-15R 156-59-2 Cis-1,2-Dichloroethene 32.3 ug/l 70 5 8/7/2003
MW-15R 156-59-2 Cis-1,2-Dichloroethene 11.1 ug/l 70 5 2/24/2004
MW-15R 156-59-2 Cis-1,2-Dichloroethene 11.9 ug/l 70 5 8/12/2004
MW-15R 156-59-2 Cis-1,2-Dichloroethene 7.9 ug/l 70 5 2/15/2005
MW-15R 156-59-2 Cis-1,2-Dichloroethene 5.6 ug/l 70 5 2/14/2007
MW-15R 156-59-2 Cis-1,2-Dichloroethene 7.8 ug/l 70 5 8/9/2007
MW-15R 156-59-2 Cis-1,2-Dichloroethene 4.4 ug/l 70 5 2/19/2008
MW-15R 156-59-2 Cis-1,2-Dichloroethene 2.4 ug/l 70 5 8/19/2008
MW-15R 156-59-2 Cis-1,2-Dichloroethene 4.5 ug/l 70 5 2/17/2009
MW-15R 156-59-2 Cis-1,2-Dichloroethene 6.8 ug/l 70 5 8/20/2009
MW-15R 156-59-2 Cis-1,2-Dichloroethene 3.7 ug/l 70 5 2/18/2010
MW-15R 156-59-2 Cis-1,2-Dichloroethene 6.6 ug/l 70 5 8/24/2010
MW-15R 156-59-2 Cis-1,2-Dichloroethene 5.9 ug/l 70 5 2/23/2011
MW-15R 156-59-2 Cis-1,2-Dichloroethene 3.5 ug/l 70 5 8/24/2011
MW-15R 156-59-2 Cis-1,2-Dichloroethene 1 ug/l 70 5 2/21/2012
MW-15R 156-59-2 Cis-1,2-Dichloroethene 0.8 ug/l 70 5 8/28/2013
MW-15R 156-59-2 Cis-1,2-Dichloroethene 0.6 ug/l 70 5 2/24/2014
MW-15R 156-59-2 Cis-1,2-Dichloroethene 0.5 ug/l 70 5 8/5/2014
MW-15R 156-59-2 Cis-1,2-Dichloroethene 0.6 ug/l 70 5 8/25/2015
MW-15R 156-59-2 Cis-1,2-Dichloroethene 0.8 ug/l 70 5 2/9/2016
MW-15R 156-59-2 Cis-1,2-Dichloroethene 0.3 ug/l 70 5 2/14/2017
MW-15R 319-86-8 Delta-BHC 0.068 ug/l 0.019 0.05 2/2/2000
MW-15R 319-86-8 Delta-BHC 0.12 ug/l 0.019 0.05 8/12/2004
MW-15R 319-86-8 Delta-BHC 0.089 ug/l 0.019 0.05 2/15/2005
MW-15R 319-86-8 Delta-BHC 0.067 ug/l 0.019 0.05 2/19/2008
MW-15R 75-71-8 Dichlorodifluoromethane 0.4 ug/l 1000 5 2/7/2002
MW-15R 75-71-8 Dichlorodifluoromethane 0.4 ug/l 1000 5 8/9/2007
MW-15R 75-71-8 Dichlorodifluoromethane 0.3 ug/l 1000 5 2/19/2008
MW-15R 75-71-8 Dichlorodifluoromethane 0.2 ug/l 1000 5 8/19/2008
MW-15R 75-71-8 Dichlorodifluoromethane 0.2 ug/l 1000 5 2/17/2009
MW-15R 72-20-8 Endrin 0.177 ug/l 2 0.1 2/6/2001
MW-15R 58-89-9 Gamma-BHC (Lindane) 0.085 ug/l 0.03 0.05 2/15/2005
MW-15R 58-89-9 Gamma-BHC (Lindane) 0.098 ug/l 0.03 0.05 2/14/2007
MW-15R 58-89-9 Gamma-BHC (Lindane) 0.039 ug/l 0.03 0.05 8/20/2009
MW-15R 58-89-9 Gamma-BHC (Lindane) 0.048 ug/l 0.03 0.05 2/23/2011
MW-15R 76-44-8 Heptachlor 0.069 ug/l 0.008 0.05 2/6/2001
MW-15R 76-44-8 Heptachlor 0.088 ug/l 0.008 0.05 2/7/2002
MW-15R 76-44-8 Heptachlor 0.088 ug/l 0.008 0.05 8/9/2007
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-15R 76-44-8 Heptachlor 0.041 ug/l 0.008 0.05 8/19/2008
MW-15R 7439-97-6 Mercury 0.00665 mg/l 1 0.2 2/7/2002
MW-15R 7439-97-6 Mercury 0.00082 mg/l 1 0.2 2/14/2007
MW-15R 7439-97-6 Mercury 0.00665 mg/l 1 0.2 8/9/2007
MW-15R 7439-97-6 Mercury 0.00077 mg/l 1 0.2 2/19/2008
MW-15R 7439-97-6 Mercury 0.00074 mg/l 1 0.2 8/19/2008
MW-15R 7439-97-6 Mercury 0.74 ug/l 1 0.2 2/17/2009
MW-15R 7439-97-6 Mercury 0.48 ug/l 1 0.2 2/18/2010
MW-15R 7439-97-6 Mercury 0.47 ug/l 1 0.2 8/24/2010
MW-15R 7439-97-6 Mercury 0.28 ug/l 1 0.2 2/23/2011
MW-15R 7439-97-6 Mercury 0.3 ug/l 1 0.2 8/24/2011
MW-15R 7439-97-6 Mercury 0.32 ug/l 1 0.2 2/21/2012
MW-15R 7439-97-6 Mercury 0.16 ug/l 1 0.2 8/28/2012
MW-15R 7439-97-6 Mercury 0.14 ug/l 1 0.2 2/19/2013
MW-15R 7439-97-6 Mercury 0.05 ug/l 1 0.2 8/28/2013
MW-15R 7439-97-6 Mercury 0.1 ug/l 1 0.2 2/24/2014
MW-15R 75-09-2 Methylene Chloride 16 ug/l 5 1 2/6/2001
MW-15R 75-09-2 Methylene Chloride 29 ug/l 5 1 8/7/2001
MW-15R 75-09-2 Methylene Chloride 6.5 ug/l 5 1 2/7/2002
MW-15R 75-09-2 Methylene Chloride 24 ug/l 5 1 2/7/2002
MW-15R 75-09-2 Methylene Chloride 40 ug/l 5 1 8/14/2002
MW-15R 75-09-2 Methylene Chloride 45.3 ug/l 5 1 2/12/2003
MW-15R 75-09-2 Methylene Chloride 33.1 ug/l 5 1 8/7/2003
MW-15R 75-09-2 Methylene Chloride 12.5 ug/l 5 1 2/24/2004
MW-15R 75-09-2 Methylene Chloride 12.4 ug/l 5 1 2/14/2007
MW-15R 75-09-2 Methylene Chloride 6.5 ug/l 5 1 8/9/2007
MW-15R 75-09-2 Methylene Chloride 2.3 ug/l 5 1 2/19/2008
MW-15R 75-09-2 Methylene Chloride 3.1 ug/l 5 1 8/19/2008
MW-15R 75-09-2 Methylene Chloride 3.8 ug/l 5 1 2/17/2009
MW-15R 75-09-2 Methylene Chloride 6 ug/l 5 1 8/20/2009
MW-15R 75-09-2 Methylene Chloride 3.2 ug/l 5 1 2/18/2010
MW-15R 75-09-2 Methylene Chloride 7.7 ug/l 5 1 8/24/2010
MW-15R 75-09-2 Methylene Chloride 8.2 ug/l 5 1 2/23/2011
MW-15R 75-09-2 Methylene Chloride 4.2 ug/l 5 1 8/24/2011
MW-15R 75-09-2 Methylene Chloride 2 ug/l 5 1 2/21/2012
MW-15R 75-09-2 Methylene Chloride 0.7 ug/l 5 1 2/19/2013
MW-15R 75-09-2 Methylene Chloride 0.7 ug/l 5 1 8/28/2013
MW-15R 91-20-3 Naphthalene 9.1 ug/l 6 10 8/10/2000
MW-15R 127-18-4 Tetrachloroethene 5.6 ug/l 0.7 1 2/6/2001
MW-15R 127-18-4 Tetrachloroethene 5.4 ug/l 0.7 1 8/7/2001
MW-15R 127-18-4 Tetrachloroethene 3.3 ug/l 0.7 1 2/7/2002
MW-15R 127-18-4 Tetrachloroethene 5.6 ug/l 0.7 1 2/7/2002
MW-15R 127-18-4 Tetrachloroethene 6.3 ug/l 0.7 1 8/14/2002
MW-15R 127-18-4 Tetrachloroethene 5.6 ug/l 0.7 1 2/12/2003
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-15R 127-18-4 Tetrachloroethene 5.1 ug/l 0.7 1 2/24/2004
MW-15R 127-18-4 Tetrachloroethene 3.3 ug/l 0.7 1 8/9/2007
MW-15R 127-18-4 Tetrachloroethene 2.5 ug/l 0.7 1 2/19/2008
MW-15R 127-18-4 Tetrachloroethene 1.9 ug/l 0.7 1 8/19/2008
MW-15R 127-18-4 Tetrachloroethene 2.5 ug/l 0.7 1 2/17/2009
MW-15R 127-18-4 Tetrachloroethene 3.1 ug/l 0.7 1 8/20/2009
MW-15R 127-18-4 Tetrachloroethene 2.5 ug/l 0.7 1 2/18/2010
MW-15R 127-18-4 Tetrachloroethene 2.5 ug/l 0.7 1 8/24/2010
MW-15R 127-18-4 Tetrachloroethene 2.5 ug/l 0.7 1 2/23/2011
MW-15R 127-18-4 Tetrachloroethene 2.6 ug/l 0.7 1 8/24/2011
MW-15R 127-18-4 Tetrachloroethene 1.5 ug/l 0.7 1 2/21/2012
MW-15R 127-18-4 Tetrachloroethene 0.3 ug/l 0.7 1 8/28/2012
MW-15R 127-18-4 Tetrachloroethene 0.6 ug/l 0.7 1 2/19/2013
MW-15R 127-18-4 Tetrachloroethene 1.3 ug/l 0.7 1 8/28/2013
MW-15R 127-18-4 Tetrachloroethene 1.2 ug/l 0.7 1 2/24/2014
MW-15R 127-18-4 Tetrachloroethene 0.9 ug/l 0.7 1 8/5/2014
MW-15R 127-18-4 Tetrachloroethene 0.9 ug/l 0.7 1 2/10/2015
MW-15R 127-18-4 Tetrachloroethene 1.5 ug/l 0.7 1 8/25/2015
MW-15R 127-18-4 Tetrachloroethene 1.3 ug/l 0.7 1 2/9/2016
MW-15R 127-18-4 Tetrachloroethene 0.9 ug/l 0.7 1 2/14/2017
MW-15R 108-88-3 Toluene 0.4 ug/l 600 1 2/7/2002
MW-15R 108-88-3 Toluene 0.4 ug/l 600 1 8/9/2007
MW-15R 108-88-3 Toluene 0.2 ug/l 600 1 2/19/2008
MW-15R 79-01-6 Trichloroethene 16 ug/l 3 1 2/2/2000
MW-15R 79-01-6 Trichloroethene 12 ug/l 3 1 5/2/2000
MW-15R 79-01-6 Trichloroethene 17 ug/l 3 1 8/10/2000
MW-15R 79-01-6 Trichloroethene 22 ug/l 3 1 2/6/2001
MW-15R 79-01-6 Trichloroethene 25 ug/l 3 1 8/7/2001
MW-15R 79-01-6 Trichloroethene 4.4 ug/l 3 1 2/7/2002
MW-15R 79-01-6 Trichloroethene 21 ug/l 3 1 2/7/2002
MW-15R 79-01-6 Trichloroethene 21 ug/l 3 1 8/14/2002
MW-15R 79-01-6 Trichloroethene 20 ug/l 3 1 2/12/2003
MW-15R 79-01-6 Trichloroethene 16.2 ug/l 3 1 8/7/2003
MW-15R 79-01-6 Trichloroethene 8.6 ug/l 3 1 2/24/2004
MW-15R 79-01-6 Trichloroethene 8.5 ug/l 3 1 8/12/2004
MW-15R 79-01-6 Trichloroethene 3.4 ug/l 3 1 2/14/2007
MW-15R 79-01-6 Trichloroethene 4.4 ug/l 3 1 8/9/2007
MW-15R 79-01-6 Trichloroethene 2.9 ug/l 3 1 2/19/2008
MW-15R 79-01-6 Trichloroethene 1.3 ug/l 3 1 8/19/2008
MW-15R 79-01-6 Trichloroethene 2.6 ug/l 3 1 2/17/2009
MW-15R 79-01-6 Trichloroethene 3.5 ug/l 3 1 8/20/2009
MW-15R 79-01-6 Trichloroethene 2.1 ug/l 3 1 2/18/2010
MW-15R 79-01-6 Trichloroethene 2.8 ug/l 3 1 8/24/2010
MW-15R 79-01-6 Trichloroethene 2.6 ug/l 3 1 2/23/2011
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-15R 79-01-6 Trichloroethene 2 ug/l 3 1 8/24/2011
MW-15R 79-01-6 Trichloroethene 0.7 ug/l 3 1 2/21/2012
MW-15R 79-01-6 Trichloroethene 0.5 ug/l 3 1 8/28/2013
MW-15R 79-01-6 Trichloroethene 0.5 ug/l 3 1 2/24/2014
MW-15R 79-01-6 Trichloroethene 0.3 ug/l 3 1 8/5/2014
MW-15R 79-01-6 Trichloroethene 0.7 ug/l 3 1 2/9/2016
MW-15R 75-69-4 Trichlorofluoromethane 0.3 ug/l 2000 1 2/7/2002
MW-15R 75-69-4 Trichlorofluoromethane 0.3 ug/l 2000 1 8/9/2007
MW-15R 1330-20-7 Xylenes 8 ug/l 500 5 2/2/2000
MW-15R 1330-20-7 Xylenes 14 ug/l 500 5 2/6/2001
MW-15R 1330-20-7 Xylenes 17 ug/l 500 5 8/7/2001
MW-15R 1330-20-7 Xylenes 2.2 ug/l 500 5 2/7/2002
MW-15R 1330-20-7 Xylenes 17 ug/l 500 5 2/7/2002
MW-15R 1330-20-7 Xylenes 22.3 ug/l 500 5 8/14/2002
MW-15R 1330-20-7 Xylenes 23.8 ug/l 500 5 2/12/2003
MW-15R 1330-20-7 Xylenes 24.9 ug/l 500 5 8/7/2003
MW-15R 1330-20-7 Xylenes 5.9 ug/l 500 5 2/24/2004
MW-15R 1330-20-7 Xylenes 2.2 ug/l 500 5 8/9/2007
MW-15R 1330-20-7 Xylenes 0.6 ug/l 500 5 2/19/2008
MW-15R 1330-20-7 Xylenes 0.5 ug/l 500 5 8/19/2008
MW-15R 1330-20-7 Xylenes 0.7 ug/l 500 5 2/17/2009
MW-15R 1330-20-7 Xylenes 0.8 ug/l 500 5 8/20/2009
MW-16A 71-55-6 1,1,1-Trichloroethane 0.3 ug/l 200 1 2/7/2002
MW-16A 71-55-6 1,1,1-Trichloroethane 0.3 ug/l 200 1 8/9/2007
MW-16A 71-55-6 1,1,1-Trichloroethane 0.2 ug/l 200 1 2/19/2008
MW-16A 71-55-6 1,1,1-Trichloroethane 0.2 ug/l 200 1 8/19/2008
MW-16A 71-55-6 1,1,1-Trichloroethane 0.2 ug/l 200 1 2/17/2009
MW-16A 79-34-5 1,1,2,2-Tetrachloroethane 0.6 ug/l 0.2 3 2/21/2012
MW-16A 75-34-3 1,1-Dichloroethane 14.3 ug/l 6 5 2/7/2002
MW-16A 75-34-3 1,1-Dichloroethane 9.6 ug/l 6 5 2/24/2004
MW-16A 75-34-3 1,1-Dichloroethane 12.3 ug/l 6 5 8/12/2004
MW-16A 75-34-3 1,1-Dichloroethane 9.8 ug/l 6 5 2/15/2005
MW-16A 75-34-3 1,1-Dichloroethane 12.1 ug/l 6 5 8/16/2005
MW-16A 75-34-3 1,1-Dichloroethane 12.9 ug/l 6 5 2/14/2006
MW-16A 75-34-3 1,1-Dichloroethane 13.6 ug/l 6 5 8/22/2006
MW-16A 75-34-3 1,1-Dichloroethane 13.4 ug/l 6 5 2/14/2007
MW-16A 75-34-3 1,1-Dichloroethane 14.3 ug/l 6 5 8/9/2007
MW-16A 75-34-3 1,1-Dichloroethane 10.3 ug/l 6 5 2/19/2008
MW-16A 75-34-3 1,1-Dichloroethane 13.2 ug/l 6 5 8/19/2008
MW-16A 75-34-3 1,1-Dichloroethane 10.6 ug/l 6 5 2/17/2009
MW-16A 75-34-3 1,1-Dichloroethane 9.6 ug/l 6 5 8/20/2009
MW-16A 75-34-3 1,1-Dichloroethane 8 ug/l 6 5 2/18/2010
MW-16A 75-34-3 1,1-Dichloroethane 11.3 ug/l 6 5 8/24/2010
MW-16A 75-34-3 1,1-Dichloroethane 12.4 ug/l 6 5 2/23/2011
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-16A 75-34-3 1,1-Dichloroethane 11.5 ug/l 6 5 8/24/2011
MW-16A 75-34-3 1,1-Dichloroethane 11.2 ug/l 6 5 2/21/2012
MW-16A 75-34-3 1,1-Dichloroethane 11 ug/l 6 5 8/28/2012
MW-16A 75-34-3 1,1-Dichloroethane 14.3 ug/l 6 5 2/19/2013
MW-16A 75-34-3 1,1-Dichloroethane 14 ug/l 6 5 8/28/2013
MW-16A 75-34-3 1,1-Dichloroethane 13 ug/l 6 5 2/24/2014
MW-16A 75-34-3 1,1-Dichloroethane 18.6 ug/l 6 5 8/5/2014
MW-16A 75-34-3 1,1-Dichloroethane 15.8 ug/l 6 5 2/11/2015
MW-16A 75-34-3 1,1-Dichloroethane 18.9 ug/l 6 5 8/25/2015
MW-16A 75-34-3 1,1-Dichloroethane 13.9 ug/l 6 5 2/9/2016
MW-16A 75-34-3 1,1-Dichloroethane 19.5 ug/l 6 5 2/14/2017
MW-16A 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/7/2002
MW-16A 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 8/9/2007
MW-16A 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 2/19/2008
MW-16A 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 8/19/2008
MW-16A 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/17/2009
MW-16A 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/20/2009
MW-16A 75-35-4 1,1-Dichloroethene 0.5 ug/l 7 5 8/24/2010
MW-16A 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 2/23/2011
MW-16A 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 8/24/2011
MW-16A 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/21/2012
MW-16A 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 8/28/2012
MW-16A 75-35-4 1,1-Dichloroethene 0.5 ug/l 7 5 2/19/2013
MW-16A 75-35-4 1,1-Dichloroethene 0.6 ug/l 7 5 8/28/2013
MW-16A 75-35-4 1,1-Dichloroethene 0.5 ug/l 7 5 2/24/2014
MW-16A 75-35-4 1,1-Dichloroethene 0.7 ug/l 7 5 8/5/2014
MW-16A 75-35-4 1,1-Dichloroethene 0.6 ug/l 7 5 2/11/2015
MW-16A 75-35-4 1,1-Dichloroethene 0.7 ug/l 7 5 8/25/2015
MW-16A 75-35-4 1,1-Dichloroethene 0.6 ug/l 7 5 2/9/2016
MW-16A 75-35-4 1,1-Dichloroethene 0.8 ug/l 7 5 2/14/2017
MW-16A 95-50-1 1,2-Dichlorobenzene 0.9 ug/l 20 5 2/7/2002
MW-16A 95-50-1 1,2-Dichlorobenzene 0.9 ug/l 20 5 8/9/2007
MW-16A 95-50-1 1,2-Dichlorobenzene 0.7 ug/l 20 5 2/19/2008
MW-16A 95-50-1 1,2-Dichlorobenzene 1 ug/l 20 5 8/19/2008
MW-16A 95-50-1 1,2-Dichlorobenzene 1 ug/l 20 5 2/17/2009
MW-16A 95-50-1 1,2-Dichlorobenzene 1 ug/l 20 5 8/20/2009
MW-16A 95-50-1 1,2-Dichlorobenzene 0.5 ug/l 20 5 2/18/2010
MW-16A 95-50-1 1,2-Dichlorobenzene 0.9 ug/l 20 5 8/24/2010
MW-16A 95-50-1 1,2-Dichlorobenzene 0.4 ug/l 20 5 2/23/2011
MW-16A 95-50-1 1,2-Dichlorobenzene 0.8 ug/l 20 5 8/24/2011
MW-16A 95-50-1 1,2-Dichlorobenzene 0.6 ug/l 20 5 8/28/2012
MW-16A 95-50-1 1,2-Dichlorobenzene 0.8 ug/l 20 5 2/19/2013
MW-16A 95-50-1 1,2-Dichlorobenzene 1 ug/l 20 5 8/28/2013
MW-16A 95-50-1 1,2-Dichlorobenzene 0.7 ug/l 20 5 2/24/2014
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-16A 95-50-1 1,2-Dichlorobenzene 1.3 ug/l 20 5 8/5/2014
MW-16A 95-50-1 1,2-Dichlorobenzene 1.3 ug/l 20 5 2/11/2015
MW-16A 95-50-1 1,2-Dichlorobenzene 1.5 ug/l 20 5 8/25/2015
MW-16A 95-50-1 1,2-Dichlorobenzene 1 ug/l 20 5 2/9/2016
MW-16A 95-50-1 1,2-Dichlorobenzene 1.2 ug/l 20 5 2/14/2017
MW-16A 107-06-2 1,2-Dichloroethane 0.3 ug/l 20 1 2/7/2002
MW-16A 107-06-2 1,2-Dichloroethane 0.3 ug/l 20 1 8/9/2007
MW-16A 107-06-2 1,2-Dichloroethane 0.2 ug/l 20 1 2/19/2008
MW-16A 107-06-2 1,2-Dichloroethane 0.3 ug/l 20 1 8/19/2008
MW-16A 107-06-2 1,2-Dichloroethane 0.4 ug/l 20 1 8/5/2014
MW-16A 107-06-2 1,2-Dichloroethane 0.4 ug/l 20 1 2/11/2015
MW-16A 107-06-2 1,2-Dichloroethane 0.4 ug/l 20 1 8/25/2015
MW-16A 107-06-2 1,2-Dichloroethane 0.5 ug/l 20 1 2/14/2017
MW-16A 78-87-5 1,2-Dichloropropane 0.6 ug/l 0.6 1 2/7/2002
MW-16A 78-87-5 1,2-Dichloropropane 0.6 ug/l 0.6 1 8/9/2007
MW-16A 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 2/19/2008
MW-16A 78-87-5 1,2-Dichloropropane 0.6 ug/l 0.6 1 8/19/2008
MW-16A 78-87-5 1,2-Dichloropropane 0.5 ug/l 0.6 1 2/17/2009
MW-16A 78-87-5 1,2-Dichloropropane 0.6 ug/l 0.6 1 8/20/2009
MW-16A 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 2/18/2010
MW-16A 78-87-5 1,2-Dichloropropane 0.5 ug/l 0.6 1 8/24/2010
MW-16A 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 2/23/2011
MW-16A 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 8/24/2011
MW-16A 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 2/21/2012
MW-16A 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 8/28/2012
MW-16A 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 2/19/2013
MW-16A 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 8/28/2013
MW-16A 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 2/24/2014
MW-16A 78-87-5 1,2-Dichloropropane 0.9 ug/l 0.6 1 8/5/2014
MW-16A 78-87-5 1,2-Dichloropropane 0.6 ug/l 0.6 1 2/11/2015
MW-16A 78-87-5 1,2-Dichloropropane 1 ug/l 0.6 1 8/25/2015
MW-16A 78-87-5 1,2-Dichloropropane 1.1 ug/l 0.6 1 2/14/2017
MW-16A 106-46-7 1,4-Dichlorobenzene 1.4 ug/l 6 1 2/7/2002
MW-16A 106-46-7 1,4-Dichlorobenzene 1.4 ug/l 6 1 8/9/2007
MW-16A 106-46-7 1,4-Dichlorobenzene 1.1 ug/l 6 1 2/19/2008
MW-16A 106-46-7 1,4-Dichlorobenzene 1.5 ug/l 6 1 8/19/2008
MW-16A 106-46-7 1,4-Dichlorobenzene 1.5 ug/l 6 1 2/17/2009
MW-16A 106-46-7 1,4-Dichlorobenzene 1.8 ug/l 6 1 8/20/2009
MW-16A 106-46-7 1,4-Dichlorobenzene 0.9 ug/l 6 1 2/18/2010
MW-16A 106-46-7 1,4-Dichlorobenzene 1.5 ug/l 6 1 8/24/2010
MW-16A 106-46-7 1,4-Dichlorobenzene 0.6 ug/l 6 1 2/23/2011
MW-16A 106-46-7 1,4-Dichlorobenzene 1.2 ug/l 6 1 8/24/2011
MW-16A 106-46-7 1,4-Dichlorobenzene 1 ug/l 6 1 8/28/2012
MW-16A 106-46-7 1,4-Dichlorobenzene 1.3 ug/l 6 1 2/19/2013
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-16A 106-46-7 1,4-Dichlorobenzene 1.6 ug/l 6 1 8/28/2013
MW-16A 106-46-7 1,4-Dichlorobenzene 1.2 ug/l 6 1 2/24/2014
MW-16A 106-46-7 1,4-Dichlorobenzene 2.2 ug/l 6 1 8/5/2014
MW-16A 106-46-7 1,4-Dichlorobenzene 2.1 ug/l 6 1 2/11/2015
MW-16A 106-46-7 1,4-Dichlorobenzene 2.8 ug/l 6 1 8/25/2015
MW-16A 106-46-7 1,4-Dichlorobenzene 1.9 ug/l 6 1 2/9/2016
MW-16A 106-46-7 1,4-Dichlorobenzene 2.4 ug/l 6 1 2/14/2017
MW-16A 58-90-2 2,3,4,6-Tetrachlorophenol 23 ug/l 200 10 8/9/1995
MW-16A 94-75-7 2,4-D 0.53 ug/l 70 2 8/28/2012
MW-16A 78-93-3 2-Butanone (Methyl ethyl ketone) 2.1 ug/l 4000 100 2/7/2002
MW-16A 78-93-3 2-Butanone (Methyl ethyl ketone) 2.1 ug/l 4000 100 8/9/2007
MW-16A 78-93-3 2-Butanone (Methyl ethyl ketone) 2.8 ug/l 4000 100 8/19/2008
MW-16A 67-64-1 Acetone 2.1 ug/l 6000 100 2/7/2002
MW-16A 67-64-1 Acetone 2.1 ug/l 6000 100 8/9/2007
MW-16A 67-64-1 Acetone 3 ug/l 6000 100 2/19/2008
MW-16A 67-64-1 Acetone 4.6 ug/l 6000 100 8/19/2008
MW-16A 309-00-2 Aldrin 0.0365 ug/l 0.002 0.05 2/17/2009
MW-16A 319-84-6 Alpha-BHC 0.039 ug/l 0.006 0.05 2/19/2008
MW-16A 71-43-2 Benzene 2.9 ug/l 1 1 2/7/2002
MW-16A 71-43-2 Benzene 2.9 ug/l 1 1 8/9/2007
MW-16A 71-43-2 Benzene 2 ug/l 1 1 2/19/2008
MW-16A 71-43-2 Benzene 2.7 ug/l 1 1 8/19/2008
MW-16A 71-43-2 Benzene 2.5 ug/l 1 1 2/17/2009
MW-16A 71-43-2 Benzene 2.5 ug/l 1 1 8/20/2009
MW-16A 71-43-2 Benzene 1.5 ug/l 1 1 2/18/2010
MW-16A 71-43-2 Benzene 2.5 ug/l 1 1 8/24/2010
MW-16A 71-43-2 Benzene 1.2 ug/l 1 1 2/23/2011
MW-16A 71-43-2 Benzene 2.1 ug/l 1 1 8/24/2011
MW-16A 71-43-2 Benzene 1.9 ug/l 1 1 2/21/2012
MW-16A 71-43-2 Benzene 2.1 ug/l 1 1 8/28/2012
MW-16A 71-43-2 Benzene 2.5 ug/l 1 1 2/19/2013
MW-16A 71-43-2 Benzene 3 ug/l 1 1 8/28/2013
MW-16A 71-43-2 Benzene 2.3 ug/l 1 1 2/24/2014
MW-16A 71-43-2 Benzene 3.9 ug/l 1 1 8/5/2014
MW-16A 71-43-2 Benzene 3.9 ug/l 1 1 2/11/2015
MW-16A 71-43-2 Benzene 4.8 ug/l 1 1 8/25/2015
MW-16A 71-43-2 Benzene 3.5 ug/l 1 1 2/9/2016
MW-16A 71-43-2 Benzene 4.5 ug/l 1 1 2/14/2017
MW-16A 117-81-7 Bis-(2-Ethylhexyl) Phthalate 62 ug/l 3 15 2/25/1997
MW-16A 117-81-7 Bis-(2-Ethylhexyl) Phthalate 160 ug/l 3 15 2/25/1999
MW-16A 117-81-7 Bis-(2-Ethylhexyl) Phthalate 11.1 ug/l 3 15 2/7/2002
MW-16A 117-81-7 Bis-(2-Ethylhexyl) Phthalate 11.1 ug/l 3 15 8/9/2007
MW-16A 74-97-5 Bromochloromethane 6.8 ug/l 0.6 3 8/14/2002
MW-16A 75-25-2 Bromoform 1 ug/l 4 3 2/21/2012
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-16A 108-90-7 Chlorobenzene 1.1 ug/l 50 3 2/7/2002
MW-16A 108-90-7 Chlorobenzene 1.1 ug/l 50 3 8/9/2007
MW-16A 108-90-7 Chlorobenzene 0.9 ug/l 50 3 2/19/2008
MW-16A 108-90-7 Chlorobenzene 1.2 ug/l 50 3 8/19/2008
MW-16A 108-90-7 Chlorobenzene 1.1 ug/l 50 3 2/17/2009
MW-16A 108-90-7 Chlorobenzene 1.1 ug/l 50 3 8/20/2009
MW-16A 108-90-7 Chlorobenzene 0.7 ug/l 50 3 2/18/2010
MW-16A 108-90-7 Chlorobenzene 1 ug/l 50 3 8/24/2010
MW-16A 108-90-7 Chlorobenzene 0.5 ug/l 50 3 2/23/2011
MW-16A 108-90-7 Chlorobenzene 0.9 ug/l 50 3 8/24/2011
MW-16A 108-90-7 Chlorobenzene 0.7 ug/l 50 3 2/21/2012
MW-16A 108-90-7 Chlorobenzene 0.7 ug/l 50 3 8/28/2012
MW-16A 108-90-7 Chlorobenzene 0.9 ug/l 50 3 2/19/2013
MW-16A 108-90-7 Chlorobenzene 1.1 ug/l 50 3 8/28/2013
MW-16A 108-90-7 Chlorobenzene 0.9 ug/l 50 3 2/24/2014
MW-16A 108-90-7 Chlorobenzene 1.5 ug/l 50 3 8/5/2014
MW-16A 108-90-7 Chlorobenzene 1.5 ug/l 50 3 2/11/2015
MW-16A 108-90-7 Chlorobenzene 1.8 ug/l 50 3 8/25/2015
MW-16A 108-90-7 Chlorobenzene 1.4 ug/l 50 3 2/9/2016
MW-16A 108-90-7 Chlorobenzene 2.2 ug/l 50 3 2/14/2017
MW-16A 75-00-3 Chloroethane 0.9 ug/l 3000 10 2/7/2002
MW-16A 75-00-3 Chloroethane 0.9 ug/l 3000 10 8/9/2007
MW-16A 75-00-3 Chloroethane 1 ug/l 3000 10 2/19/2008
MW-16A 75-00-3 Chloroethane 1 ug/l 3000 10 8/19/2008
MW-16A 75-00-3 Chloroethane 0.8 ug/l 3000 10 2/17/2009
MW-16A 75-00-3 Chloroethane 0.7 ug/l 3000 10 8/20/2009
MW-16A 75-00-3 Chloroethane 0.5 ug/l 3000 10 2/18/2010
MW-16A 75-00-3 Chloroethane 0.9 ug/l 3000 10 8/24/2010
MW-16A 75-00-3 Chloroethane 0.7 ug/l 3000 10 8/24/2011
MW-16A 75-00-3 Chloroethane 0.7 ug/l 3000 10 8/28/2013
MW-16A 75-00-3 Chloroethane 0.5 ug/l 3000 10 2/24/2014
MW-16A 75-00-3 Chloroethane 0.9 ug/l 3000 10 8/25/2015
MW-16A 75-00-3 Chloroethane 0.5 ug/l 3000 10 2/9/2016
MW-16A 74-87-3 Chloromethane 0.2 ug/l 3 1 8/19/2008
MW-16A 74-87-3 Chloromethane 0.6 ug/l 3 1 8/20/2009
MW-16A 156-59-2 Cis-1,2-Dichloroethene 40.5 ug/l 70 5 2/7/2002
MW-16A 156-59-2 Cis-1,2-Dichloroethene 9.6 ug/l 70 5 2/24/2004
MW-16A 156-59-2 Cis-1,2-Dichloroethene 20.3 ug/l 70 5 8/12/2004
MW-16A 156-59-2 Cis-1,2-Dichloroethene 22.1 ug/l 70 5 2/15/2005
MW-16A 156-59-2 Cis-1,2-Dichloroethene 27.7 ug/l 70 5 8/16/2005
MW-16A 156-59-2 Cis-1,2-Dichloroethene 27.3 ug/l 70 5 2/14/2006
MW-16A 156-59-2 Cis-1,2-Dichloroethene 32.4 ug/l 70 5 8/22/2006
MW-16A 156-59-2 Cis-1,2-Dichloroethene 35.7 ug/l 70 5 2/14/2007
MW-16A 156-59-2 Cis-1,2-Dichloroethene 40.5 ug/l 70 5 8/9/2007
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-16A 156-59-2 Cis-1,2-Dichloroethene 26.3 ug/l 70 5 2/19/2008
MW-16A 156-59-2 Cis-1,2-Dichloroethene 35.1 ug/l 70 5 8/19/2008
MW-16A 156-59-2 Cis-1,2-Dichloroethene 32.4 ug/l 70 5 2/17/2009
MW-16A 156-59-2 Cis-1,2-Dichloroethene 29.8 ug/l 70 5 8/20/2009
MW-16A 156-59-2 Cis-1,2-Dichloroethene 19.1 ug/l 70 5 2/18/2010
MW-16A 156-59-2 Cis-1,2-Dichloroethene 29.6 ug/l 70 5 8/24/2010
MW-16A 156-59-2 Cis-1,2-Dichloroethene 18.6 ug/l 70 5 2/23/2011
MW-16A 156-59-2 Cis-1,2-Dichloroethene 26.4 ug/l 70 5 8/24/2011
MW-16A 156-59-2 Cis-1,2-Dichloroethene 23.1 ug/l 70 5 2/21/2012
MW-16A 156-59-2 Cis-1,2-Dichloroethene 21.1 ug/l 70 5 8/28/2012
MW-16A 156-59-2 Cis-1,2-Dichloroethene 30.2 ug/l 70 5 2/19/2013
MW-16A 156-59-2 Cis-1,2-Dichloroethene 37.4 ug/l 70 5 8/28/2013
MW-16A 156-59-2 Cis-1,2-Dichloroethene 26 ug/l 70 5 2/24/2014
MW-16A 156-59-2 Cis-1,2-Dichloroethene 48.2 ug/l 70 5 8/5/2014
MW-16A 156-59-2 Cis-1,2-Dichloroethene 51.5 ug/l 70 5 2/11/2015
MW-16A 156-59-2 Cis-1,2-Dichloroethene 64.9 ug/l 70 5 8/25/2015
MW-16A 156-59-2 Cis-1,2-Dichloroethene 50.6 ug/l 70 5 2/9/2016
MW-16A 156-59-2 Cis-1,2-Dichloroethene 64.1 ug/l 70 5 2/14/2017
MW-16A 75-71-8 Dichlorodifluoromethane 4.7 ug/l 1000 5 2/7/2002
MW-16A 75-71-8 Dichlorodifluoromethane 9.4 ug/l 1000 5 8/12/2004
MW-16A 75-71-8 Dichlorodifluoromethane 7.1 ug/l 1000 5 2/14/2006
MW-16A 75-71-8 Dichlorodifluoromethane 9.6 ug/l 1000 5 2/14/2007
MW-16A 75-71-8 Dichlorodifluoromethane 4.7 ug/l 1000 5 8/9/2007
MW-16A 75-71-8 Dichlorodifluoromethane 9.3 ug/l 1000 5 2/19/2008
MW-16A 75-71-8 Dichlorodifluoromethane 6.3 ug/l 1000 5 8/19/2008
MW-16A 75-71-8 Dichlorodifluoromethane 7.1 ug/l 1000 5 2/17/2009
MW-16A 75-71-8 Dichlorodifluoromethane 6.7 ug/l 1000 5 8/20/2009
MW-16A 75-71-8 Dichlorodifluoromethane 5.3 ug/l 1000 5 2/18/2010
MW-16A 75-71-8 Dichlorodifluoromethane 5.3 ug/l 1000 5 8/24/2010
MW-16A 75-71-8 Dichlorodifluoromethane 6.7 ug/l 1000 5 2/23/2011
MW-16A 75-71-8 Dichlorodifluoromethane 10 ug/l 1000 5 8/24/2011
MW-16A 75-71-8 Dichlorodifluoromethane 6.6 ug/l 1000 5 2/21/2012
MW-16A 75-71-8 Dichlorodifluoromethane 6.6 ug/l 1000 5 8/28/2012
MW-16A 75-71-8 Dichlorodifluoromethane 16.9 ug/l 1000 5 2/19/2013
MW-16A 75-71-8 Dichlorodifluoromethane 8.5 ug/l 1000 5 8/28/2013
MW-16A 75-71-8 Dichlorodifluoromethane 5.5 ug/l 1000 5 2/24/2014
MW-16A 75-71-8 Dichlorodifluoromethane 16.2 ug/l 1000 5 8/5/2014
MW-16A 75-71-8 Dichlorodifluoromethane 6.4 ug/l 1000 5 2/11/2015
MW-16A 75-71-8 Dichlorodifluoromethane 17.2 ug/l 1000 5 8/25/2015
MW-16A 75-71-8 Dichlorodifluoromethane 11.1 ug/l 1000 5 2/9/2016
MW-16A 75-71-8 Dichlorodifluoromethane 13.4 ug/l 1000 5 2/14/2017
MW-16A 76-44-8 Heptachlor 0.044 ug/l 0.008 0.05 8/20/2009
MW-16A 7439-97-6 Mercury 0.5 ug/l 1 0.2 8/9/1995
MW-16A 7439-97-6 Mercury 1.4 ug/l 1 0.2 2/15/1996
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-16A 7439-97-6 Mercury 0.8 ug/l 1 0.2 8/8/1996
MW-16A 7439-97-6 Mercury 0.55 ug/l 1 0.2 2/2/1998
MW-16A 7439-97-6 Mercury 0.00044 mg/l 1 0.2 2/7/2002
MW-16A 7439-97-6 Mercury 0.00044 mg/l 1 0.2 8/9/2007
MW-16A 7439-97-6 Mercury 0.00005 mg/l 1 0.2 2/19/2008
MW-16A 7439-97-6 Mercury 0.00041 mg/l 1 0.2 8/19/2008
MW-16A 7439-97-6 Mercury 0.39 ug/l 1 0.2 2/17/2009
MW-16A 7439-97-6 Mercury 0.11 ug/l 1 0.2 2/18/2010
MW-16A 7439-97-6 Mercury 0.23 ug/l 1 0.2 8/24/2010
MW-16A 7439-97-6 Mercury 0.22 ug/l 1 0.2 8/24/2011
MW-16A 7439-97-6 Mercury 0.11 ug/l 1 0.2 2/21/2012
MW-16A 7439-97-6 Mercury 0.25 ug/l 1 0.2 8/28/2012
MW-16A 7439-97-6 Mercury 1.1 ug/l 1 0.2 2/19/2013
MW-16A 7439-97-6 Mercury 0.22 ug/l 1 0.2 2/24/2014
MW-16A 75-09-2 Methylene Chloride 22.5 ug/l 5 1 2/7/2002
MW-16A 75-09-2 Methylene Chloride 18.5 ug/l 5 1 2/24/2004
MW-16A 75-09-2 Methylene Chloride 42.1 ug/l 5 1 8/12/2004
MW-16A 75-09-2 Methylene Chloride 49.3 ug/l 5 1 2/15/2005
MW-16A 75-09-2 Methylene Chloride 53.4 ug/l 5 1 8/16/2005
MW-16A 75-09-2 Methylene Chloride 46.6 ug/l 5 1 2/14/2006
MW-16A 75-09-2 Methylene Chloride 18.3 ug/l 5 1 8/22/2006
MW-16A 75-09-2 Methylene Chloride 48.3 ug/l 5 1 2/14/2007
MW-16A 75-09-2 Methylene Chloride 22.5 ug/l 5 1 8/9/2007
MW-16A 75-09-2 Methylene Chloride 1.2 ug/l 5 1 2/19/2008
MW-16A 75-09-2 Methylene Chloride 20 ug/l 5 1 8/19/2008
MW-16A 75-09-2 Methylene Chloride 6.4 ug/l 5 1 2/17/2009
MW-16A 75-09-2 Methylene Chloride 4.4 ug/l 5 1 8/20/2009
MW-16A 75-09-2 Methylene Chloride 2.6 ug/l 5 1 2/18/2010
MW-16A 75-09-2 Methylene Chloride 1.4 ug/l 5 1 8/24/2010
MW-16A 75-09-2 Methylene Chloride 1.7 ug/l 5 1 2/23/2011
MW-16A 75-09-2 Methylene Chloride 3.1 ug/l 5 1 8/24/2011
MW-16A 75-09-2 Methylene Chloride 3.6 ug/l 5 1 8/28/2012
MW-16A 75-09-2 Methylene Chloride 3.9 ug/l 5 1 2/19/2013
MW-16A 75-09-2 Methylene Chloride 1.7 ug/l 5 1 8/28/2013
MW-16A 75-09-2 Methylene Chloride 6.4 ug/l 5 1 8/5/2014
MW-16A 75-09-2 Methylene Chloride 4.2 ug/l 5 1 2/11/2015
MW-16A 75-09-2 Methylene Chloride 0.7 ug/l 5 1 8/25/2015
MW-16A 75-09-2 Methylene Chloride 1.6 ug/l 5 1 2/9/2016
MW-16A 127-18-4 Tetrachloroethene 5.8 ug/l 0.7 1 2/7/2002
MW-16A 127-18-4 Tetrachloroethene 26.6 ug/l 0.7 1 2/7/2002
MW-16A 127-18-4 Tetrachloroethene 5.1 ug/l 0.7 1 2/12/2003
MW-16A 127-18-4 Tetrachloroethene 7.5 ug/l 0.7 1 8/7/2003
MW-16A 127-18-4 Tetrachloroethene 16.7 ug/l 0.7 1 2/24/2004
MW-16A 127-18-4 Tetrachloroethene 21.7 ug/l 0.7 1 8/12/2004
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-16A 127-18-4 Tetrachloroethene 15.6 ug/l 0.7 1 2/15/2005
MW-16A 127-18-4 Tetrachloroethene 20.9 ug/l 0.7 1 8/16/2005
MW-16A 127-18-4 Tetrachloroethene 23.2 ug/l 0.7 1 2/14/2006
MW-16A 127-18-4 Tetrachloroethene 22.1 ug/l 0.7 1 8/22/2006
MW-16A 127-18-4 Tetrachloroethene 23.6 ug/l 0.7 1 2/14/2007
MW-16A 127-18-4 Tetrachloroethene 26.6 ug/l 0.7 1 8/9/2007
MW-16A 127-18-4 Tetrachloroethene 31.9 ug/l 0.7 1 2/19/2008
MW-16A 127-18-4 Tetrachloroethene 36.6 ug/l 0.7 1 8/19/2008
MW-16A 127-18-4 Tetrachloroethene 37 ug/l 0.7 1 2/17/2009
MW-16A 127-18-4 Tetrachloroethene 40.9 ug/l 0.7 1 8/20/2009
MW-16A 127-18-4 Tetrachloroethene 35.1 ug/l 0.7 1 2/18/2010
MW-16A 127-18-4 Tetrachloroethene 52.2 ug/l 0.7 1 8/24/2010
MW-16A 127-18-4 Tetrachloroethene 44.9 ug/l 0.7 1 2/23/2011
MW-16A 127-18-4 Tetrachloroethene 53.1 ug/l 0.7 1 8/24/2011
MW-16A 127-18-4 Tetrachloroethene 45.8 ug/l 0.7 1 2/21/2012
MW-16A 127-18-4 Tetrachloroethene 47.3 ug/l 0.7 1 8/28/2012
MW-16A 127-18-4 Tetrachloroethene 50.2 ug/l 0.7 1 2/19/2013
MW-16A 127-18-4 Tetrachloroethene 58.9 ug/l 0.7 1 8/28/2013
MW-16A 127-18-4 Tetrachloroethene 50 ug/l 0.7 1 2/24/2014
MW-16A 127-18-4 Tetrachloroethene 53.8 ug/l 0.7 1 8/5/2014
MW-16A 127-18-4 Tetrachloroethene 59.2 ug/l 0.7 1 2/11/2015
MW-16A 127-18-4 Tetrachloroethene 72.1 ug/l 0.7 1 8/25/2015
MW-16A 127-18-4 Tetrachloroethene 56.5 ug/l 0.7 1 2/9/2016
MW-16A 127-18-4 Tetrachloroethene 61.1 ug/l 0.7 1 2/14/2017
MW-16A 108-88-3 Toluene 0.6 ug/l 600 1 2/7/2002
MW-16A 108-88-3 Toluene 0.6 ug/l 600 1 8/9/2007
MW-16A 108-88-3 Toluene 0.3 ug/l 600 1 2/19/2008
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.4 ug/l 100 5 2/7/2002
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.4 ug/l 100 5 8/9/2007
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.2 ug/l 100 5 2/19/2008
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.4 ug/l 100 5 8/19/2008
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.3 ug/l 100 5 2/17/2009
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.4 ug/l 100 5 8/20/2009
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.3 ug/l 100 5 2/18/2010
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.5 ug/l 100 5 8/24/2011
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.4 ug/l 100 5 2/21/2012
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.5 ug/l 100 5 8/28/2012
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.5 ug/l 100 5 2/19/2013
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.5 ug/l 100 5 8/28/2013
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.4 ug/l 100 5 2/24/2014
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.7 ug/l 100 5 8/5/2014
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.6 ug/l 100 5 2/11/2015
MW-16A 156-60-5 trans-1,2-Dichloroethene 1 ug/l 100 5 8/25/2015
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.6 ug/l 100 5 2/9/2016
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-16A 156-60-5 trans-1,2-Dichloroethene 0.8 ug/l 100 5 2/14/2017
MW-16A 79-01-6 Trichloroethene 20.8 ug/l 3 1 2/7/2002
MW-16A 79-01-6 Trichloroethene 6.2 ug/l 3 1 8/7/2003
MW-16A 79-01-6 Trichloroethene 12.4 ug/l 3 1 2/24/2004
MW-16A 79-01-6 Trichloroethene 17.2 ug/l 3 1 8/12/2004
MW-16A 79-01-6 Trichloroethene 14.1 ug/l 3 1 2/15/2005
MW-16A 79-01-6 Trichloroethene 16.8 ug/l 3 1 8/16/2005
MW-16A 79-01-6 Trichloroethene 18.3 ug/l 3 1 2/14/2006
MW-16A 79-01-6 Trichloroethene 19.2 ug/l 3 1 8/22/2006
MW-16A 79-01-6 Trichloroethene 20.5 ug/l 3 1 2/14/2007
MW-16A 79-01-6 Trichloroethene 20.8 ug/l 3 1 8/9/2007
MW-16A 79-01-6 Trichloroethene 17.4 ug/l 3 1 2/19/2008
MW-16A 79-01-6 Trichloroethene 20.2 ug/l 3 1 8/19/2008
MW-16A 79-01-6 Trichloroethene 18.5 ug/l 3 1 2/17/2009
MW-16A 79-01-6 Trichloroethene 19.9 ug/l 3 1 8/20/2009
MW-16A 79-01-6 Trichloroethene 14.7 ug/l 3 1 2/18/2010
MW-16A 79-01-6 Trichloroethene 20.2 ug/l 3 1 8/24/2010
MW-16A 79-01-6 Trichloroethene 20.1 ug/l 3 1 2/23/2011
MW-16A 79-01-6 Trichloroethene 20.6 ug/l 3 1 8/24/2011
MW-16A 79-01-6 Trichloroethene 19.1 ug/l 3 1 2/21/2012
MW-16A 79-01-6 Trichloroethene 18.9 ug/l 3 1 8/28/2012
MW-16A 79-01-6 Trichloroethene 24 ug/l 3 1 2/19/2013
MW-16A 79-01-6 Trichloroethene 26.4 ug/l 3 1 8/28/2013
MW-16A 79-01-6 Trichloroethene 21.9 ug/l 3 1 2/24/2014
MW-16A 79-01-6 Trichloroethene 31.5 ug/l 3 1 8/5/2014
MW-16A 79-01-6 Trichloroethene 28.9 ug/l 3 1 2/11/2015
MW-16A 79-01-6 Trichloroethene 35.5 ug/l 3 1 8/25/2015
MW-16A 79-01-6 Trichloroethene 29.1 ug/l 3 1 2/9/2016
MW-16A 79-01-6 Trichloroethene 32.8 ug/l 3 1 2/14/2017
MW-16A 75-69-4 Trichlorofluoromethane 1.3 ug/l 2000 1 2/7/2002
MW-16A 75-69-4 Trichlorofluoromethane 1.3 ug/l 2000 1 8/9/2007
MW-16A 75-69-4 Trichlorofluoromethane 0.9 ug/l 2000 1 2/19/2008
MW-16A 75-69-4 Trichlorofluoromethane 1.3 ug/l 2000 1 8/19/2008
MW-16A 75-69-4 Trichlorofluoromethane 1.3 ug/l 2000 1 2/17/2009
MW-16A 75-69-4 Trichlorofluoromethane 0.9 ug/l 2000 1 8/20/2009
MW-16A 75-69-4 Trichlorofluoromethane 0.8 ug/l 2000 1 2/18/2010
MW-16A 75-69-4 Trichlorofluoromethane 0.7 ug/l 2000 1 8/24/2010
MW-16A 75-69-4 Trichlorofluoromethane 0.5 ug/l 2000 1 2/23/2011
MW-16A 75-69-4 Trichlorofluoromethane 0.7 ug/l 2000 1 8/24/2011
MW-16A 75-69-4 Trichlorofluoromethane 0.6 ug/l 2000 1 2/21/2012
MW-16A 75-69-4 Trichlorofluoromethane 0.6 ug/l 2000 1 8/28/2012
MW-16A 75-69-4 Trichlorofluoromethane 0.4 ug/l 2000 1 8/28/2013
MW-16A 75-69-4 Trichlorofluoromethane 0.4 ug/l 2000 1 2/24/2014
MW-16A 75-69-4 Trichlorofluoromethane 0.6 ug/l 2000 1 8/5/2014
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-16A 75-69-4 Trichlorofluoromethane 0.4 ug/l 2000 1 2/11/2015
MW-16A 75-69-4 Trichlorofluoromethane 0.5 ug/l 2000 1 2/9/2016
MW-16A 75-69-4 Trichlorofluoromethane 0.3 ug/l 2000 1 2/14/2017
MW-16A 75-01-4 Vinyl chloride 0.8 ug/l 0.03 1 2/7/2002
MW-16A 75-01-4 Vinyl chloride 0.8 ug/l 0.03 1 8/9/2007
MW-16A 75-01-4 Vinyl chloride 0.5 ug/l 0.03 1 2/19/2008
MW-16A 75-01-4 Vinyl chloride 0.8 ug/l 0.03 1 8/19/2008
MW-16A 75-01-4 Vinyl Chloride 0.8 ug/l 0.03 1 2/17/2009
MW-16A 75-01-4 Vinyl Chloride 0.7 ug/l 0.03 1 8/24/2011
MW-16A 75-01-4 Vinyl Chloride 0.7 ug/l 0.03 1 2/21/2012
MW-16A 75-01-4 Vinyl Chloride 1 ug/l 0.03 1 8/5/2014
MW-16A 75-01-4 Vinyl Chloride 1.8 ug/l 0.03 1 8/25/2015
MW-16A 75-01-4 Vinyl Chloride 1.1 ug/l 0.03 1 2/9/2016
MW-16A 1330-20-7 Xylenes 2.3 ug/l 500 5 2/7/2002
MW-16A 1330-20-7 Xylenes 2.3 ug/l 500 5 8/9/2007
MW-16A 1330-20-7 Xylenes 1.8 ug/l 500 5 8/19/2008
MW-16A 1330-20-7 Xylenes 1.3 ug/l 500 5 2/17/2009
MW-16A 1330-20-7 Xylenes 0.7 ug/l 500 5 8/24/2011
MW-17 75-34-3 1,1-Dichloroethane 3.1 ug/l 6 5 8/9/2007
MW-17 75-34-3 1,1-Dichloroethane 2 ug/l 6 5 2/19/2008
MW-17 75-34-3 1,1-Dichloroethane 3.4 ug/l 6 5 8/19/2008
MW-17 75-34-3 1,1-Dichloroethane 2.8 ug/l 6 5 2/17/2009
MW-17 75-34-3 1,1-Dichloroethane 3.8 ug/l 6 5 8/19/2009
MW-17 75-34-3 1,1-Dichloroethane 3.3 ug/l 6 5 2/18/2010
MW-17 75-34-3 1,1-Dichloroethane 4.8 ug/l 6 5 8/25/2010
MW-17 75-34-3 1,1-Dichloroethane 4.4 ug/l 6 5 2/22/2011
MW-17 75-34-3 1,1-Dichloroethane 4.8 ug/l 6 5 8/25/2011
MW-17 75-34-3 1,1-Dichloroethane 4.7 ug/l 6 5 2/22/2012
MW-17 75-34-3 1,1-Dichloroethane 3.9 ug/l 6 5 8/30/2012
MW-17 75-34-3 1,1-Dichloroethane 4.4 ug/l 6 5 2/20/2013
MW-17 75-34-3 1,1-Dichloroethane 3.6 ug/l 6 5 8/29/2013
MW-17 75-34-3 1,1-Dichloroethane 4.8 ug/l 6 5 2/25/2014
MW-17 75-34-3 1,1-Dichloroethane 6.7 ug/l 6 5 8/6/2014
MW-17 75-34-3 1,1-Dichloroethane 4.2 ug/l 6 5 2/11/2015
MW-17 75-34-3 1,1-Dichloroethane 5.1 ug/l 6 5 8/26/2015
MW-17 75-34-3 1,1-Dichloroethane 5.9 ug/l 6 5 2/9/2016
MW-17 75-34-3 1,1-Dichloroethane 7.9 ug/l 6 5 2/14/2017
MW-17 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/9/2007
MW-17 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/19/2008
MW-17 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 2/18/2010
MW-17 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 8/25/2010
MW-17 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 2/22/2011
MW-17 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/25/2011
MW-17 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 2/22/2012
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-17 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/30/2012
MW-17 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/6/2014
MW-17 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 2/11/2015
MW-17 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 2/14/2017
MW-17 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 2/14/2017
MW-17 106-46-7 1,4-Dichlorobenzene 0.5 ug/l 6 1 2/14/2017
MW-17 78-93-3 2-Butanone (Methyl ethyl ketone) 3.8 ug/l 4000 100 8/19/2008
MW-17 78-93-3 2-Butanone (Methyl ethyl ketone) 1.3 ug/l 4000 100 8/19/2009
MW-17 64-19-7 Acetic Acid 47 ug/L NE NE 2/24/2011
MW-17 64-19-7 Acetic Acid 63 ug/l NE NE 2/11/2015
MW-17 64-19-7 Acetic Acid 37 ug/l NE NE 8/26/2015
MW-17 67-64-1 Acetone 4.1 ug/l 6000 100 2/19/2008
MW-17 67-64-1 Acetone 5.3 ug/l 6000 100 8/19/2008
MW-17 67-64-1 Acetone 1.6 ug/l 6000 100 8/19/2009
MW-17 71-43-2 Benzene 0.2 ug/l 1 1 8/19/2009
MW-17 71-43-2 Benzene 0.3 ug/l 1 1 8/25/2010
MW-17 71-43-2 Benzene 0.3 ug/l 1 1 8/6/2014
MW-17 71-43-2 Benzene 0.3 ug/l 1 1 2/9/2016
MW-17 71-43-2 Benzene 0.5 ug/l 1 1 2/14/2017
MW-17 117-81-7 Bis-(2-Ethylhexyl) Phthalate 11.8 ug/l 3 15 2/18/2010
MW-17 107-92-6 Butyric Acid 100 ug/L NE NE 2/24/2011
MW-17 107-92-6 Butyric Acid 16 ug/l NE NE 8/26/2015
MW-17 124-38-9 Carbon Dioxide 92 mg/l NE NE 8/19/2009
MW-17 124-38-9 Carbon Dioxide 75 mg/l NE NE 2/18/2010
MW-17 124-38-9 Carbon Dioxide 122000 ug/l NE 1000 8/25/2010
MW-17 124-38-9 Carbon Dioxide 52000 ug/l NE 1000 2/22/2011
MW-17 124-38-9 Carbon Dioxide 68000 ug/l NE 1000 8/25/2011
MW-17 124-38-9 Carbon Dioxide 25000 ug/l NE 1000 2/22/2012
MW-17 124-38-9 Carbon Dioxide 55000 ug/l NE 1000 8/30/2012
MW-17 124-38-9 Carbon Dioxide 38000 ug/l NE 1000 2/11/2015
MW-17 124-38-9 Carbon Dioxide 60000 ug/l NE 1000 8/26/2015
MW-17 16887-00-6 Chloride 5 mg/l 250 5 8/19/2009
MW-17 16887-00-6 Chloride 7 mg/l 250 5 2/18/2010
MW-17 16887-00-6 Chloride 6000 ug/l 250000 5000 8/25/2010
MW-17 16887-00-6 Chloride 6000 ug/l 250000 5000 2/22/2011
MW-17 16887-00-6 Chloride 6000 ug/l 250000 5000 8/25/2011
MW-17 16887-00-6 Chloride 5000 ug/l 250000 5000 2/22/2012
MW-17 16887-00-6 Chloride 10000 ug/l 250000 5000 8/30/2012
MW-17 16887-00-6 Chloride 8000 ug/l 250000 5000 2/20/2013
MW-17 16887-00-6 Chloride 8000 ug/l 250000 5000 2/25/2014
MW-17 16887-00-6 Chloride 7000 ug/l 250000 5000 2/9/2016
MW-17 16887-00-6 Chloride 9000 ug/l 250000 5000 2/14/2017
MW-17 108-90-7 Chlorobenzene 0.2 ug/l 50 3 8/19/2009
MW-17 108-90-7 Chlorobenzene 0.5 ug/l 50 3 2/14/2017
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-17 74-87-3 Chloromethane 0.2 ug/l 3 1 8/19/2008
MW-17 156-59-2 Cis-1,2-Dichloroethene 1.4 ug/l 70 5 8/9/2007
MW-17 156-59-2 Cis-1,2-Dichloroethene 0.9 ug/l 70 5 2/19/2008
MW-17 156-59-2 Cis-1,2-Dichloroethene 1.4 ug/l 70 5 8/19/2008
MW-17 156-59-2 Cis-1,2-Dichloroethene 1.2 ug/l 70 5 2/17/2009
MW-17 156-59-2 Cis-1,2-Dichloroethene 3 ug/l 70 5 8/19/2009
MW-17 156-59-2 Cis-1,2-Dichloroethene 1.6 ug/l 70 5 2/18/2010
MW-17 156-59-2 Cis-1,2-Dichloroethene 2.9 ug/l 70 5 8/25/2010
MW-17 156-59-2 Cis-1,2-Dichloroethene 2.3 ug/l 70 5 2/22/2011
MW-17 156-59-2 Cis-1,2-Dichloroethene 2.8 ug/l 70 5 8/25/2011
MW-17 156-59-2 Cis-1,2-Dichloroethene 2.4 ug/l 70 5 2/22/2012
MW-17 156-59-2 Cis-1,2-Dichloroethene 2 ug/l 70 5 8/30/2012
MW-17 156-59-2 Cis-1,2-Dichloroethene 2.6 ug/l 70 5 2/20/2013
MW-17 156-59-2 Cis-1,2-Dichloroethene 2.4 ug/l 70 5 8/29/2013
MW-17 156-59-2 Cis-1,2-Dichloroethene 2.8 ug/l 70 5 2/25/2014
MW-17 156-59-2 Cis-1,2-Dichloroethene 4.8 ug/l 70 5 8/6/2014
MW-17 156-59-2 Cis-1,2-Dichloroethene 2.8 ug/l 70 5 2/11/2015
MW-17 156-59-2 Cis-1,2-Dichloroethene 3.5 ug/l 70 5 8/26/2015
MW-17 156-59-2 Cis-1,2-Dichloroethene 5.7 ug/l 70 5 2/9/2016
MW-17 156-59-2 Cis-1,2-Dichloroethene 9.9 ug/l 70 5 2/14/2017
MW-17 75-71-8 Dichlorodifluoromethane 1.9 ug/l 1000 5 8/19/2009
MW-17 75-71-8 Dichlorodifluoromethane 2 ug/l 1000 5 8/25/2010
MW-17 75-71-8 Dichlorodifluoromethane 1.7 ug/l 1000 5 2/22/2011
MW-17 75-71-8 Dichlorodifluoromethane 1.7 ug/l 1000 5 8/25/2011
MW-17 75-71-8 Dichlorodifluoromethane 1.1 ug/l 1000 5 2/22/2012
MW-17 75-71-8 Dichlorodifluoromethane 0.9 ug/l 1000 5 8/30/2012
MW-17 75-71-8 Dichlorodifluoromethane 1.9 ug/l 1000 5 2/20/2013
MW-17 75-71-8 Dichlorodifluoromethane 0.8 ug/l 1000 5 8/29/2013
MW-17 75-71-8 Dichlorodifluoromethane 0.8 ug/l 1000 5 2/25/2014
MW-17 75-71-8 Dichlorodifluoromethane 2.6 ug/l 1000 5 8/6/2014
MW-17 75-71-8 Dichlorodifluoromethane 0.8 ug/l 1000 5 2/11/2015
MW-17 75-71-8 Dichlorodifluoromethane 1.6 ug/l 1000 5 8/26/2015
MW-17 75-71-8 Dichlorodifluoromethane 2.4 ug/l 1000 5 2/9/2016
MW-17 75-71-8 Dichlorodifluoromethane 2.1 ug/l 1000 5 2/14/2017
MW-17 74-84-0 Ethane 0.014 ug/l NE NE 8/26/2015
MW-17 74-85-1 Ethene 0.057 ug/l NE NE 8/30/2012
MW-17 74-85-1 Ethene 0.013 ug/l NE NE 8/26/2015
MW-17 76-44-8 Heptachlor 0.042 ug/l 0.008 0.05 8/19/2009
MW-17 1333-74-0 Hydrogen 0.79 nM NE NE 2/24/2011
MW-17 1333-74-0 Hydrogen 1.5 nM NE NE 8/25/2011
MW-17 1333-74-0 Hydrogen 0.62 nM NE NE 2/22/2012
MW-17 1333-74-0 Hydrogen 6.5 nM NE NE 8/30/2012
MW-17 1333-74-0 Hydrogen 0.66 nM NE NE 2/11/2015
MW-17 1333-74-0 Hydrogen 3.1 nM NE NE 8/26/2015
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-17 50-21-5 Lactic Acid 240 ug/L NE NE 2/24/2011
MW-17 50-21-5 Lactic Acid 220 ug/l NE NE 8/25/2011
MW-17 50-21-5 Lactic Acid 190 ug/l NE NE 8/30/2012
MW-17 50-21-5 Lactic Acid 260 ug/l NE NE 2/11/2015
MW-17 7439-97-6 Mercury 0.18 ug/l 1 0.2 8/19/2009
MW-17 7439-97-6 Mercury 0.1 ug/l 1 0.2 2/18/2010
MW-17 7439-97-6 Mercury 0.19 ug/l 1 0.2 8/25/2010
MW-17 7439-97-6 Mercury 0.13 ug/l 1 0.2 2/22/2011
MW-17 7439-97-6 Mercury 0.17 ug/l 1 0.2 8/30/2012
MW-17 7439-97-6 Mercury 0.05 ug/l 1 0.2 2/20/2013
MW-17 7439-97-6 Mercury 0.02 ug/l 1 0.2 2/25/2014
MW-17 74-82-8 Methane 1400 ug/L NE NE 2/24/2011
MW-17 74-82-8 Methane 2000 ug/l NE NE 8/25/2011
MW-17 74-82-8 Methane 1100 ug/l NE NE 2/22/2012
MW-17 74-82-8 Methane 1100 ug/l NE NE 8/30/2012
MW-17 74-82-8 Methane 1100 ug/l NE NE 2/11/2015
MW-17 74-82-8 Methane 1300 ug/l NE NE 8/26/2015
MW-17 75-09-2 Methylene Chloride 0.2 ug/l 5 1 8/9/2007
MW-17 75-09-2 Methylene Chloride 0.2 ug/l 5 1 2/19/2008
MW-17 75-09-2 Methylene Chloride 0.7 ug/l 5 1 8/19/2008
MW-17 75-09-2 Methylene Chloride 0.4 ug/l 5 1 2/17/2009
MW-17 75-09-2 Methylene Chloride 0.8 ug/l 5 1 8/19/2009
MW-17 79-09-4 Propionic Acid 67 ug/l NE NE 8/25/2011
MW-17 127-17-3 Pyruvic Acid 33 ug/l NE NE 2/22/2012
MW-17 127-18-4 Tetrachloroethene 1.1 ug/l 0.7 1 8/9/2007
MW-17 127-18-4 Tetrachloroethene 1.4 ug/l 0.7 1 2/19/2008
MW-17 127-18-4 Tetrachloroethene 1.7 ug/l 0.7 1 8/19/2008
MW-17 127-18-4 Tetrachloroethene 1.6 ug/l 0.7 1 2/17/2009
MW-17 127-18-4 Tetrachloroethene 1.5 ug/l 0.7 1 8/19/2009
MW-17 127-18-4 Tetrachloroethene 1.6 ug/l 0.7 1 2/18/2010
MW-17 127-18-4 Tetrachloroethene 1.8 ug/l 0.7 1 8/25/2010
MW-17 127-18-4 Tetrachloroethene 1.5 ug/l 0.7 1 2/22/2011
MW-17 127-18-4 Tetrachloroethene 1.5 ug/l 0.7 1 8/25/2011
MW-17 127-18-4 Tetrachloroethene 1.2 ug/l 0.7 1 2/22/2012
MW-17 127-18-4 Tetrachloroethene 1.2 ug/l 0.7 1 8/30/2012
MW-17 127-18-4 Tetrachloroethene 1 ug/l 0.7 1 2/20/2013
MW-17 127-18-4 Tetrachloroethene 1.1 ug/l 0.7 1 8/29/2013
MW-17 127-18-4 Tetrachloroethene 1.2 ug/l 0.7 1 2/25/2014
MW-17 127-18-4 Tetrachloroethene 1.4 ug/l 0.7 1 8/6/2014
MW-17 127-18-4 Tetrachloroethene 1.1 ug/l 0.7 1 2/11/2015
MW-17 127-18-4 Tetrachloroethene 1 ug/l 0.7 1 8/26/2015
MW-17 127-18-4 Tetrachloroethene 1.2 ug/l 0.7 1 2/9/2016
MW-17 127-18-4 Tetrachloroethene 1.1 ug/l 0.7 1 2/14/2017
MW-17 108-88-3 Toluene 0.3 ug/l 600 1 2/19/2008
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-17 79-01-6 Trichloroethene 1.8 ug/l 3 1 8/9/2007
MW-17 79-01-6 Trichloroethene 1.3 ug/l 3 1 2/19/2008
MW-17 79-01-6 Trichloroethene 1.8 ug/l 3 1 8/19/2008
MW-17 79-01-6 Trichloroethene 1.5 ug/l 3 1 2/17/2009
MW-17 79-01-6 Trichloroethene 2.3 ug/l 3 1 8/19/2009
MW-17 79-01-6 Trichloroethene 1.6 ug/l 3 1 2/18/2010
MW-17 79-01-6 Trichloroethene 2.1 ug/l 3 1 8/25/2010
MW-17 79-01-6 Trichloroethene 1.7 ug/l 3 1 2/22/2011
MW-17 79-01-6 Trichloroethene 1.4 ug/l 3 1 8/25/2011
MW-17 79-01-6 Trichloroethene 1.2 ug/l 3 1 2/22/2012
MW-17 79-01-6 Trichloroethene 1.1 ug/l 3 1 8/30/2012
MW-17 79-01-6 Trichloroethene 0.9 ug/l 3 1 2/20/2013
MW-17 79-01-6 Trichloroethene 0.9 ug/l 3 1 8/29/2013
MW-17 79-01-6 Trichloroethene 1.1 ug/l 3 1 2/25/2014
MW-17 79-01-6 Trichloroethene 1.7 ug/l 3 1 8/6/2014
MW-17 79-01-6 Trichloroethene 1.1 ug/l 3 1 2/11/2015
MW-17 79-01-6 Trichloroethene 1.2 ug/l 3 1 8/26/2015
MW-17 79-01-6 Trichloroethene 1.6 ug/l 3 1 2/9/2016
MW-17 79-01-6 Trichloroethene 2.2 ug/l 3 1 2/14/2017
MW-17 75-69-4 Trichlorofluoromethane 0.3 ug/l 2000 1 8/9/2007
MW-17 75-69-4 Trichlorofluoromethane 0.2 ug/l 2000 1 2/19/2008
MW-17 75-69-4 Trichlorofluoromethane 0.3 ug/l 2000 1 8/19/2008
MW-17 75-69-4 Trichlorofluoromethane 0.3 ug/l 2000 1 8/6/2014
MW-17 75-01-4 Vinyl Chloride 0.7 ug/l 0.03 1 2/9/2016
MW-18D 75-34-3 1,1-Dichloroethane 1.5 ug/l 6 5 8/9/2007
MW-18D 75-34-3 1,1-Dichloroethane 1.1 ug/l 6 5 2/19/2008
MW-18D 75-34-3 1,1-Dichloroethane 1.2 ug/l 6 5 8/19/2008
MW-18D 75-34-3 1,1-Dichloroethane 1 ug/l 6 5 2/17/2009
MW-18D 75-34-3 1,1-Dichloroethane 0.9 ug/l 6 5 2/18/2010
MW-18D 75-34-3 1,1-Dichloroethane 0.9 ug/l 6 5 2/22/2011
MW-18D 78-93-3 2-Butanone (Methyl ethyl ketone) 3.3 ug/l 4000 100 8/19/2008
MW-18D 64-19-7 Acetic Acid 51 ug/L NE NE 2/24/2011
MW-18D 64-19-7 Acetic Acid 260 ug/l NE NE 2/22/2012
MW-18D 64-19-7 Acetic Acid 68 ug/l NE NE 2/11/2015
MW-18D 64-19-7 Acetic Acid 42 ug/l NE NE 8/26/2015
MW-18D 67-64-1 Acetone 2.8 ug/l 6000 100 2/19/2008
MW-18D 67-64-1 Acetone 5 ug/l 6000 100 8/19/2008
MW-18D 107-92-6 Butyric Acid 230 ug/l NE NE 2/22/2012
MW-18D 107-92-6 Butyric Acid 20 ug/l NE NE 8/26/2015
MW-18D 124-38-9 Carbon Dioxide 55 mg/l NE NE 2/18/2010
MW-18D 124-38-9 Carbon Dioxide 43000 ug/l NE 1000 2/22/2011
MW-18D 124-38-9 Carbon Dioxide 32000 ug/l NE 1000 2/11/2015
MW-18D 124-38-9 Carbon Dioxide 18000 ug/l NE 1000 8/26/2015
MW-18D 16887-00-6 Chloride 10 mg/l 250 5 2/18/2010
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-18D 16887-00-6 Chloride 5000 ug/l 250000 5000 2/22/2011
MW-18D 16887-00-6 Chloride 5000 ug/l 250000 5000 2/20/2013
MW-18D 16887-00-6 Chloride 7000 ug/l 250000 5000 2/25/2014
MW-18D 16887-00-6 Chloride 5000 ug/l 250000 5000 2/11/2015
MW-18D 16887-00-6 Chloride 9000 ug/l 250000 5000 2/9/2016
MW-18D 16887-00-6 Chloride 12000 ug/l 250000 5000 2/14/2017
MW-18D 74-87-3 Chloromethane 0.2 ug/l 3 1 8/19/2008
MW-18D 156-59-2 Cis-1,2-Dichloroethene 0.8 ug/l 70 5 8/9/2007
MW-18D 156-59-2 Cis-1,2-Dichloroethene 0.6 ug/l 70 5 2/19/2008
MW-18D 156-59-2 Cis-1,2-Dichloroethene 0.6 ug/l 70 5 8/19/2008
MW-18D 156-59-2 Cis-1,2-Dichloroethene 0.5 ug/l 70 5 2/17/2009
MW-18D 156-59-2 Cis-1,2-Dichloroethene 0.6 ug/l 70 5 2/18/2010
MW-18D 156-59-2 Cis-1,2-Dichloroethene 0.5 ug/l 70 5 2/22/2011
MW-18D 74-84-0 Ethane 0.003 ug/L NE NE 2/24/2011
MW-18D 74-84-0 Ethane 0.0032 ug/l NE NE 2/11/2015
MW-18D 74-84-0 Ethane 0.015 ug/l NE NE 8/26/2015
MW-18D 74-85-1 Ethene 0.027 ug/L NE NE 2/24/2011
MW-18D 74-85-1 Ethene 0.68 ug/l NE NE 2/22/2012
MW-18D 74-85-1 Ethene 0.038 ug/l NE NE 2/11/2015
MW-18D 74-85-1 Ethene 0.097 ug/l NE NE 8/26/2015
MW-18D 1333-74-0 Hydrogen 1.3 nM NE NE 2/24/2011
MW-18D 1333-74-0 Hydrogen 0.68 nM NE NE 2/22/2012
MW-18D 1333-74-0 Hydrogen 1.2 nM NE NE 2/11/2015
MW-18D 1333-74-0 Hydrogen 2.8 nM NE NE 8/26/2015
MW-18D 50-21-5 Lactic Acid 100 ug/l NE NE 2/22/2012
MW-18D 50-21-5 Lactic Acid 310 ug/l NE NE 2/11/2015
MW-18D 50-21-5 Lactic Acid 15 ug/l NE NE 8/26/2015
MW-18D 7439-97-6 Mercury 0.07 ug/l 1 0.2 2/18/2010
MW-18D 74-82-8 Methane 46 ug/L NE NE 2/24/2011
MW-18D 74-82-8 Methane 30 ug/l NE NE 2/22/2012
MW-18D 74-82-8 Methane 6.6 ug/l NE NE 2/11/2015
MW-18D 74-82-8 Methane 30 ug/l NE NE 8/26/2015
MW-18D 79-09-4 Propionic Acid 65 ug/l NE NE 2/22/2012
MW-18D 127-18-4 Tetrachloroethene 0.2 ug/l 0.7 1 2/19/2008
MW-18D 108-88-3 Toluene 0.3 ug/l 600 1 2/19/2008
MW-18D 79-01-6 Trichloroethene 0.3 ug/l 3 1 8/9/2007
MW-18D 79-01-6 Trichloroethene 0.2 ug/l 3 1 2/19/2008
MW-18D 79-01-6 Trichloroethene 0.3 ug/l 3 1 8/19/2008
MW-18D 79-01-6 Trichloroethene 0.2 ug/l 3 1 2/17/2009
MW-18S 75-34-3 1,1-Dichloroethane 1.2 ug/l 6 5 8/9/2007
MW-18S 75-34-3 1,1-Dichloroethane 0.5 ug/l 6 5 2/19/2008
MW-18S 75-34-3 1,1-Dichloroethane 1.4 ug/l 6 5 8/19/2008
MW-18S 75-34-3 1,1-Dichloroethane 0.7 ug/l 6 5 2/17/2009
MW-18S 75-34-3 1,1-Dichloroethane 0.9 ug/l 6 5 8/19/2009
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-18S 75-34-3 1,1-Dichloroethane 0.3 ug/l 6 5 2/18/2010
MW-18S 75-34-3 1,1-Dichloroethane 0.8 ug/l 6 5 8/25/2010
MW-18S 75-34-3 1,1-Dichloroethane 0.4 ug/l 6 5 2/22/2011
MW-18S 75-34-3 1,1-Dichloroethane 0.4 ug/l 6 5 8/25/2011
MW-18S 75-34-3 1,1-Dichloroethane 0.7 ug/l 6 5 2/20/2013
MW-18S 75-34-3 1,1-Dichloroethane 0.4 ug/l 6 5 8/29/2013
MW-18S 75-34-3 1,1-Dichloroethane 0.5 ug/l 6 5 2/25/2014
MW-18S 75-34-3 1,1-Dichloroethane 1.9 ug/l 6 5 8/6/2014
MW-18S 75-34-3 1,1-Dichloroethane 2.2 ug/l 6 5 2/11/2015
MW-18S 75-34-3 1,1-Dichloroethane 6.2 ug/l 6 5 8/26/2015
MW-18S 75-34-3 1,1-Dichloroethane 0.5 ug/l 6 5 2/9/2016
MW-18S 75-34-3 1,1-Dichloroethane 1.1 ug/l 6 5 2/14/2017
MW-18S 106-46-7 1,4-Dichlorobenzene 0.9 ug/l 6 1 8/26/2015
MW-18S 78-93-3 2-Butanone (Methyl ethyl ketone) 1.4 ug/l 4000 100 8/9/2007
MW-18S 78-93-3 2-Butanone (Methyl ethyl ketone) 3.3 ug/l 4000 100 8/19/2008
MW-18S 64-19-7 Acetic Acid 84 ug/L NE NE 2/24/2011
MW-18S 64-19-7 Acetic Acid 110 ug/l NE NE 8/25/2011
MW-18S 64-19-7 Acetic Acid 120 ug/l NE NE 2/22/2012
MW-18S 64-19-7 Acetic Acid 71 ug/l NE NE 2/11/2015
MW-18S 64-19-7 Acetic Acid 66 ug/l NE NE 8/26/2015
MW-18S 67-64-1 Acetone 9.1 ug/l 6000 100 8/9/2007
MW-18S 67-64-1 Acetone 3.2 ug/l 6000 100 2/19/2008
MW-18S 67-64-1 Acetone 5.4 ug/l 6000 100 8/19/2008
MW-18S 67-64-1 Acetone 2.6 ug/l 6000 100 8/19/2009
MW-18S 71-43-2 Benzene 0.6 ug/l 1 1 8/26/2015
MW-18S 117-81-7 Bis-(2-Ethylhexyl) Phthalate 10.3 ug/l 3 15 8/25/2010
MW-18S 107-92-6 Butyric Acid 93 ug/l NE NE 2/22/2012
MW-18S 107-92-6 Butyric Acid 19 ug/l NE NE 8/26/2015
MW-18S 124-38-9 Carbon Dioxide 124 mg/l NE NE 8/19/2009
MW-18S 124-38-9 Carbon Dioxide 82 mg/l NE NE 2/18/2010
MW-18S 124-38-9 Carbon Dioxide 75000 ug/l NE 1000 8/25/2010
MW-18S 124-38-9 Carbon Dioxide 72000 ug/l NE 1000 2/22/2011
MW-18S 124-38-9 Carbon Dioxide 75000 ug/l NE 1000 8/25/2011
MW-18S 124-38-9 Carbon Dioxide 15000 ug/l NE 1000 2/22/2012
MW-18S 124-38-9 Carbon Dioxide 71000 ug/l NE 1000 2/22/2012
MW-18S 124-38-9 Carbon Dioxide 70000 ug/l NE 1000 8/30/2012
MW-18S 124-38-9 Carbon Dioxide 115000 ug/l NE 1000 2/11/2015
MW-18S 124-38-9 Carbon Dioxide 79000 ug/l NE 1000 8/26/2015
MW-18S 16887-00-6 Chloride 11 mg/l 250 5 8/19/2009
MW-18S 16887-00-6 Chloride 5 mg/l 250 5 2/18/2010
MW-18S 16887-00-6 Chloride 8000 ug/l 250000 5000 8/25/2010
MW-18S 16887-00-6 Chloride 6000 ug/l 250000 5000 2/22/2011
MW-18S 16887-00-6 Chloride 8000 ug/l 250000 5000 8/25/2011
MW-18S 16887-00-6 Chloride 5000 ug/l 250000 5000 2/22/2012
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-18S 16887-00-6 Chloride 5000 ug/l 250000 5000 2/22/2012
MW-18S 16887-00-6 Chloride 8000 ug/l 250000 5000 8/30/2012
MW-18S 16887-00-6 Chloride 6000 ug/l 250000 5000 2/20/2013
MW-18S 16887-00-6 Chloride 9000 ug/l 250000 5000 2/25/2014
MW-18S 16887-00-6 Chloride 5000 ug/l 250000 5000 2/11/2015
MW-18S 16887-00-6 Chloride 26000 ug/l 250000 5000 2/9/2016
MW-18S 16887-00-6 Chloride 11000 ug/l 250000 5000 2/14/2017
MW-18S 108-90-7 Chlorobenzene 0.5 ug/l 50 3 2/11/2015
MW-18S 108-90-7 Chlorobenzene 1.8 ug/l 50 3 8/26/2015
MW-18S 75-00-3 Chloroethane 0.3 ug/l 3000 10 8/19/2009
MW-18S 75-00-3 Chloroethane 0.7 ug/l 3000 10 8/26/2015
MW-18S 74-87-3 Chloromethane 0.2 ug/l 3 1 8/19/2008
MW-18S 74-87-3 Chloromethane 0.2 ug/l 3 1 8/19/2009
MW-18S 156-59-2 Cis-1,2-Dichloroethene 0.2 ug/l 70 5 8/9/2007
MW-18S 156-59-2 Cis-1,2-Dichloroethene 0.3 ug/l 70 5 2/19/2008
MW-18S 156-59-2 Cis-1,2-Dichloroethene 0.6 ug/l 70 5 8/19/2008
MW-18S 156-59-2 Cis-1,2-Dichloroethene 0.2 ug/l 70 5 2/17/2009
MW-18S 156-59-2 Cis-1,2-Dichloroethene 0.4 ug/l 70 5 2/11/2015
MW-18S 156-59-2 Cis-1,2-Dichloroethene 0.3 ug/l 70 5 2/9/2016
MW-18S 156-59-2 Cis-1,2-Dichloroethene 0.6 ug/l 70 5 2/14/2017
MW-18S 74-84-0 Ethane 0.062 ug/L NE NE 2/24/2011
MW-18S 74-84-0 Ethane 0.05 ug/l NE NE 8/25/2011
MW-18S 74-84-0 Ethane 0.048 ug/l NE NE 8/30/2012
MW-18S 74-84-0 Ethane 0.22 ug/l NE NE 2/11/2015
MW-18S 74-84-0 Ethane 0.59 ug/l NE NE 8/26/2015
MW-18S 74-85-1 Ethene 0.015 ug/L NE NE 2/24/2011
MW-18S 74-85-1 Ethene 0.049 ug/l NE NE 8/25/2011
MW-18S 74-85-1 Ethene 0.048 ug/l NE NE 8/26/2015
MW-18S 1333-74-0 Hydrogen 1.1 nM NE NE 2/24/2011
MW-18S 1333-74-0 Hydrogen 4.5 nM NE NE 8/25/2011
MW-18S 1333-74-0 Hydrogen 0.87 nM NE NE 2/22/2012
MW-18S 1333-74-0 Hydrogen 6 nM NE NE 8/30/2012
MW-18S 1333-74-0 Hydrogen 1.1 nM NE NE 2/11/2015
MW-18S 1333-74-0 Hydrogen 2.9 nM NE NE 8/26/2015
MW-18S 50-21-5 Lactic Acid 350 ug/L NE NE 2/24/2011
MW-18S 50-21-5 Lactic Acid 380 ug/l NE NE 8/25/2011
MW-18S 50-21-5 Lactic Acid 260 ug/l NE NE 8/30/2012
MW-18S 50-21-5 Lactic Acid 230 ug/l NE NE 2/11/2015
MW-18S 7439-97-6 Mercury 0.03 ug/l 1 0.2 8/30/2012
MW-18S 7439-97-6 Mercury 0.05 ug/l 1 0.2 2/9/2016
MW-18S 74-82-8 Methane 4000 ug/L NE NE 2/24/2011
MW-18S 74-82-8 Methane 4400 ug/l NE NE 8/25/2011
MW-18S 74-82-8 Methane 3800 ug/l NE NE 2/22/2012
MW-18S 74-82-8 Methane 4800 ug/l NE NE 8/30/2012
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-18S 74-82-8 Methane 9200 ug/l NE NE 2/11/2015
MW-18S 74-82-8 Methane 1200 ug/l NE NE 8/26/2015
MW-18S 79-09-4 Propionic Acid 83 ug/l NE NE 8/25/2011
MW-18S 108-88-3 Toluene 0.3 ug/l 600 1 8/9/2007
MW-18S 108-88-3 Toluene 0.3 ug/l 600 1 2/19/2008
MW-18S 75-01-4 Vinyl chloride 0.7 ug/l 0.03 1 8/9/2007
MW-18S 75-01-4 Vinyl chloride 0.5 ug/l 0.03 1 2/19/2008
MW-18S 75-01-4 Vinyl chloride 0.7 ug/l 0.03 1 8/19/2008
MW-18S 75-01-4 Vinyl Chloride 0.4 ug/l 0.03 1 2/17/2009
MW-18S 75-01-4 Vinyl Chloride 0.4 ug/l 0.03 1 8/19/2009
MW-18S 75-01-4 Vinyl Chloride 3.6 ug/l 0.03 1 8/26/2015
MW-2A 75-34-3 1,1-Dichloroethane 13 ug/l 6 5 8/9/1995
MW-2A 75-34-3 1,1-Dichloroethane 21 ug/l 6 5 12/4/1995
MW-2A 75-34-3 1,1-Dichloroethane 31 ug/l 6 5 2/25/1997
MW-2A 75-34-3 1,1-Dichloroethane 16 ug/l 6 5 8/18/1997
MW-2A 75-34-3 1,1-Dichloroethane 18 ug/l 6 5 2/2/1998
MW-2A 75-34-3 1,1-Dichloroethane 17 ug/l 6 5 9/10/1998
MW-2A 75-34-3 1,1-Dichloroethane 19 ug/l 6 5 2/25/1999
MW-2A 75-34-3 1,1-Dichloroethane 15.5 ug/l 6 5 10/7/1999
MW-2A 75-34-3 1,1-Dichloroethane 14 ug/l 6 5 2/2/2000
MW-2A 75-34-3 1,1-Dichloroethane 4.4 ug/l 6 5 2/7/2002
MW-2A 75-34-3 1,1-Dichloroethane 5.2 ug/l 6 5 2/12/2003
MW-2A 75-34-3 1,1-Dichloroethane 22.6 ug/l 6 5 2/24/2004
MW-2A 75-34-3 1,1-Dichloroethane 13 ug/l 6 5 2/15/2005
MW-2A 75-34-3 1,1-Dichloroethane 5 ug/l 6 5 8/16/2005
MW-2A 75-34-3 1,1-Dichloroethane 8.2 ug/l 6 5 2/14/2006
MW-2A 75-34-3 1,1-Dichloroethane 13.6 ug/l 6 5 2/14/2007
MW-2A 75-34-3 1,1-Dichloroethane 4.4 ug/l 6 5 8/9/2007
MW-2A 75-34-3 1,1-Dichloroethane 16.8 ug/l 6 5 2/19/2008
MW-2A 75-34-3 1,1-Dichloroethane 15.5 ug/l 6 5 8/19/2008
MW-2A 75-34-3 1,1-Dichloroethane 6.5 ug/l 6 5 2/17/2009
MW-2A 75-34-3 1,1-Dichloroethane 5.8 ug/l 6 5 8/19/2009
MW-2A 75-34-3 1,1-Dichloroethane 14.6 ug/l 6 5 2/18/2010
MW-2A 75-34-3 1,1-Dichloroethane 5.1 ug/l 6 5 8/25/2010
MW-2A 75-34-3 1,1-Dichloroethane 2 ug/l 6 5 2/22/2011
MW-2A 75-34-3 1,1-Dichloroethane 0.8 ug/l 6 5 8/25/2011
MW-2A 75-34-3 1,1-Dichloroethane 1 ug/l 6 5 2/22/2012
MW-2A 75-34-3 1,1-Dichloroethane 2 ug/l 6 5 8/30/2012
MW-2A 75-34-3 1,1-Dichloroethane 2.3 ug/l 6 5 2/20/2013
MW-2A 75-34-3 1,1-Dichloroethane 1.8 ug/l 6 5 8/29/2013
MW-2A 75-34-3 1,1-Dichloroethane 3.9 ug/l 6 5 2/25/2014
MW-2A 75-34-3 1,1-Dichloroethane 5 ug/l 6 5 8/6/2014
MW-2A 75-34-3 1,1-Dichloroethane 9.6 ug/l 6 5 2/11/2015
MW-2A 75-34-3 1,1-Dichloroethane 7.7 ug/l 6 5 8/26/2015
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2A 75-34-3 1,1-Dichloroethane 7.9 ug/l 6 5 2/9/2016
MW-2A 75-34-3 1,1-Dichloroethane 1 ug/l 6 5 2/14/2017
MW-2A 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 2/7/2002
MW-2A 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/9/2007
MW-2A 75-35-4 1,1-Dichloroethene 0.7 ug/l 7 5 2/19/2008
MW-2A 75-35-4 1,1-Dichloroethene 0.8 ug/l 7 5 8/19/2008
MW-2A 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/17/2009
MW-2A 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 8/19/2009
MW-2A 75-35-4 1,1-Dichloroethene 1 ug/l 7 5 2/18/2010
MW-2A 75-35-4 1,1-Dichloroethene 0.6 ug/l 7 5 2/11/2015
MW-2A 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/9/2016
MW-2A 107-06-2 1,2-Dichloroethane 0.3 ug/l 20 1 2/19/2008
MW-2A 107-06-2 1,2-Dichloroethane 0.3 ug/l 20 1 8/19/2008
MW-2A 107-06-2 1,2-Dichloroethane 0.4 ug/l 20 1 2/18/2010
MW-2A 78-87-5 1,2-Dichloropropane 9.5 ug/l 0.6 1 2/2/1998
MW-2A 78-87-5 1,2-Dichloropropane 0.2 ug/l 0.6 1 2/19/2008
MW-2A 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 2/11/2015
MW-2A 106-46-7 1,4-Dichlorobenzene 0.6 ug/l 6 1 2/19/2008
MW-2A 106-46-7 1,4-Dichlorobenzene 0.5 ug/l 6 1 8/19/2008
MW-2A 106-46-7 1,4-Dichlorobenzene 1.1 ug/l 6 1 2/18/2010
MW-2A 106-46-7 1,4-Dichlorobenzene 1.9 ug/l 6 1 2/11/2015
MW-2A 106-46-7 1,4-Dichlorobenzene 1 ug/l 6 1 8/26/2015
MW-2A 106-46-7 1,4-Dichlorobenzene 1.9 ug/l 6 1 2/9/2016
MW-2A 94-75-7 2,4-D 0.42 ug/l 70 2 8/30/2012
MW-2A 94-75-7 2,4-D 0.39 ug/l 70 2 8/29/2013
MW-2A 78-93-3 2-Butanone (Methyl ethyl ketone) 2.1 ug/l 4000 100 2/7/2002
MW-2A 78-93-3 2-Butanone (Methyl ethyl ketone) 2.1 ug/l 4000 100 8/9/2007
MW-2A 78-93-3 2-Butanone (Methyl ethyl ketone) 3.5 ug/l 4000 100 8/19/2008
MW-2A 78-93-3 2-Butanone (Methyl ethyl ketone) 0.9 ug/l 4000 100 2/17/2009
MW-2A 64-19-7 Acetic Acid 55 ug/L NE NE 2/24/2011
MW-2A 64-19-7 Acetic Acid 110 ug/l NE NE 8/25/2011
MW-2A 64-19-7 Acetic Acid 62 ug/l NE NE 2/11/2015
MW-2A 64-19-7 Acetic Acid 48 ug/l NE NE 8/26/2015
MW-2A 67-64-1 Acetone 1.4 ug/l 6000 100 2/7/2002
MW-2A 67-64-1 Acetone 1.4 ug/l 6000 100 8/9/2007
MW-2A 67-64-1 Acetone 3.2 ug/l 6000 100 2/19/2008
MW-2A 67-64-1 Acetone 5.4 ug/l 6000 100 8/19/2008
MW-2A 67-64-1 Acetone 1.3 ug/l 6000 100 8/19/2009
MW-2A 71-43-2 Benzene 0.5 ug/l 1 1 2/19/2008
MW-2A 71-43-2 Benzene 0.6 ug/l 1 1 8/19/2008
MW-2A 71-43-2 Benzene 0.3 ug/l 1 1 2/17/2009
MW-2A 71-43-2 Benzene 0.3 ug/l 1 1 8/19/2009
MW-2A 71-43-2 Benzene 0.8 ug/l 1 1 2/18/2010
MW-2A 71-43-2 Benzene 0.3 ug/l 1 1 8/25/2010
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2A 71-43-2 Benzene 0.3 ug/l 1 1 8/6/2014
MW-2A 71-43-2 Benzene 0.7 ug/l 1 1 2/11/2015
MW-2A 71-43-2 Benzene 0.6 ug/l 1 1 8/26/2015
MW-2A 71-43-2 Benzene 0.8 ug/l 1 1 2/9/2016
MW-2A 71-43-2 Benzene 0.4 ug/l 1 1 2/14/2017
MW-2A 117-81-7 Bis-(2-Ethylhexyl) Phthalate 105 ug/l 3 15 2/20/2013
MW-2A 117-81-7 Bis-(2-Ethylhexyl) Phthalate 10.2 ug/l 3 15 8/29/2013
MW-2A 107-92-6 Butyric Acid 19 ug/l NE NE 8/26/2015
MW-2A 124-38-9 Carbon Dioxide 230 mg/l NE NE 8/19/2009
MW-2A 124-38-9 Carbon Dioxide 292 mg/l NE NE 2/18/2010
MW-2A 124-38-9 Carbon Dioxide 72000 ug/l NE 1000 8/25/2010
MW-2A 124-38-9 Carbon Dioxide 93000 ug/l NE 1000 2/22/2011
MW-2A 124-38-9 Carbon Dioxide 60000 ug/l NE 1000 8/25/2011
MW-2A 124-38-9 Carbon Dioxide 85000 ug/l NE 1000 2/22/2012
MW-2A 124-38-9 Carbon Dioxide 118000 ug/l NE 1000 8/30/2012
MW-2A 124-38-9 Carbon Dioxide 75000 ug/l NE 1000 2/11/2015
MW-2A 124-38-9 Carbon Dioxide 193000 ug/l NE 1000 8/26/2015
MW-2A 16887-00-6 Chloride 7 mg/l 250 5 8/19/2009
MW-2A 16887-00-6 Chloride 5 mg/l 250 5 2/18/2010
MW-2A 16887-00-6 Chloride 6000 ug/l 250000 5000 8/25/2010
MW-2A 16887-00-6 Chloride 7000 ug/l 250000 5000 2/22/2011
MW-2A 16887-00-6 Chloride 5000 ug/l 250000 5000 8/25/2011
MW-2A 16887-00-6 Chloride 6000 ug/l 250000 5000 2/22/2012
MW-2A 16887-00-6 Chloride 9800 ug/l 250000 5000 8/30/2012
MW-2A 16887-00-6 Chloride 10000 ug/l 250000 5000 2/20/2013
MW-2A 16887-00-6 Chloride 8000 ug/l 250000 5000 8/29/2013
MW-2A 16887-00-6 Chloride 7000 ug/l 250000 5000 2/25/2014
MW-2A 16887-00-6 Chloride 7000 ug/l 250000 5000 8/6/2014
MW-2A 16887-00-6 Chloride 5000 ug/l 250000 5000 2/11/2015
MW-2A 16887-00-6 Chloride 7000 ug/l 250000 5000 8/26/2015
MW-2A 16887-00-6 Chloride 31000 ug/l 250000 5000 2/9/2016
MW-2A 16887-00-6 Chloride 32000 ug/l 250000 5000 2/14/2017
MW-2A 108-90-7 Chlorobenzene 0.2 ug/l 50 3 2/7/2002
MW-2A 108-90-7 Chlorobenzene 0.2 ug/l 50 3 8/9/2007
MW-2A 108-90-7 Chlorobenzene 1.1 ug/l 50 3 2/19/2008
MW-2A 108-90-7 Chlorobenzene 1.6 ug/l 50 3 8/19/2008
MW-2A 108-90-7 Chlorobenzene 1 ug/l 50 3 2/17/2009
MW-2A 108-90-7 Chlorobenzene 1 ug/l 50 3 8/19/2009
MW-2A 108-90-7 Chlorobenzene 2.5 ug/l 50 3 2/18/2010
MW-2A 108-90-7 Chlorobenzene 1 ug/l 50 3 8/25/2010
MW-2A 108-90-7 Chlorobenzene 0.4 ug/l 50 3 2/22/2011
MW-2A 108-90-7 Chlorobenzene 0.3 ug/l 50 3 8/29/2013
MW-2A 108-90-7 Chlorobenzene 0.6 ug/l 50 3 2/25/2014
MW-2A 108-90-7 Chlorobenzene 1 ug/l 50 3 8/6/2014
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2A 108-90-7 Chlorobenzene 3.3 ug/l 50 3 2/11/2015
MW-2A 108-90-7 Chlorobenzene 2 ug/l 50 3 8/26/2015
MW-2A 108-90-7 Chlorobenzene 3 ug/l 50 3 2/9/2016
MW-2A 108-90-7 Chlorobenzene 1.3 ug/l 50 3 2/14/2017
MW-2A 75-00-3 Chloroethane 1.1 ug/l 3000 10 2/19/2008
MW-2A 75-00-3 Chloroethane 0.7 ug/l 3000 10 2/18/2010
MW-2A 75-00-3 Chloroethane 0.6 ug/l 3000 10 8/25/2010
MW-2A 75-00-3 Chloroethane 0.6 ug/l 3000 10 2/9/2016
MW-2A 74-87-3 Chloromethane 0.3 ug/l 3 1 8/19/2008
MW-2A 156-59-2 Cis-1,2-Dichloroethene 12 ug/l 70 5 8/9/1995
MW-2A 156-59-2 Cis-1,2-Dichloroethene 21 ug/l 70 5 12/4/1995
MW-2A 156-59-2 Cis-1,2-Dichloroethene 26 ug/l 70 5 2/15/1996
MW-2A 156-59-2 Cis-1,2-Dichloroethene 16 ug/l 70 5 8/8/1996
MW-2A 156-59-2 Cis-1,2-Dichloroethene 32 ug/l 70 5 2/25/1997
MW-2A 156-59-2 Cis-1,2-Dichloroethene 12 ug/l 70 5 8/18/1997
MW-2A 156-59-2 Cis-1,2-Dichloroethene 15 ug/l 70 5 2/2/1998
MW-2A 156-59-2 Cis-1,2-Dichloroethene 10 ug/l 70 5 9/10/1998
MW-2A 156-59-2 Cis-1,2-Dichloroethene 16 ug/l 70 5 2/25/1999
MW-2A 156-59-2 Cis-1,2-Dichloroethene 17.3 ug/l 70 5 10/7/1999
MW-2A 156-59-2 Cis-1,2-Dichloroethene 15 ug/l 70 5 2/2/2000
MW-2A 156-59-2 Cis-1,2-Dichloroethene 2.7 ug/l 70 5 2/7/2002
MW-2A 156-59-2 Cis-1,2-Dichloroethene 16.7 ug/l 70 5 2/24/2004
MW-2A 156-59-2 Cis-1,2-Dichloroethene 11.6 ug/l 70 5 2/15/2005
MW-2A 156-59-2 Cis-1,2-Dichloroethene 7.6 ug/l 70 5 2/14/2006
MW-2A 156-59-2 Cis-1,2-Dichloroethene 11.8 ug/l 70 5 2/14/2007
MW-2A 156-59-2 Cis-1,2-Dichloroethene 2.7 ug/l 70 5 8/9/2007
MW-2A 156-59-2 Cis-1,2-Dichloroethene 15.8 ug/l 70 5 2/19/2008
MW-2A 156-59-2 Cis-1,2-Dichloroethene 11.9 ug/l 70 5 8/19/2008
MW-2A 156-59-2 Cis-1,2-Dichloroethene 6.9 ug/l 70 5 2/17/2009
MW-2A 156-59-2 Cis-1,2-Dichloroethene 4.7 ug/l 70 5 8/19/2009
MW-2A 156-59-2 Cis-1,2-Dichloroethene 18.7 ug/l 70 5 2/18/2010
MW-2A 156-59-2 Cis-1,2-Dichloroethene 1.9 ug/l 70 5 8/25/2010
MW-2A 156-59-2 Cis-1,2-Dichloroethene 1.4 ug/l 70 5 2/22/2011
MW-2A 156-59-2 Cis-1,2-Dichloroethene 0.3 ug/l 70 5 8/25/2011
MW-2A 156-59-2 Cis-1,2-Dichloroethene 0.5 ug/l 70 5 2/22/2012
MW-2A 156-59-2 Cis-1,2-Dichloroethene 0.3 ug/l 70 5 2/20/2013
MW-2A 156-59-2 Cis-1,2-Dichloroethene 0.3 ug/l 70 5 2/25/2014
MW-2A 156-59-2 Cis-1,2-Dichloroethene 9.7 ug/l 70 5 2/11/2015
MW-2A 156-59-2 Cis-1,2-Dichloroethene 1.9 ug/l 70 5 8/26/2015
MW-2A 156-59-2 Cis-1,2-Dichloroethene 6 ug/l 70 5 2/9/2016
MW-2A 75-71-8 Dichlorodifluoromethane 0.3 ug/l 1000 5 2/7/2002
MW-2A 75-71-8 Dichlorodifluoromethane 0.3 ug/l 1000 5 8/9/2007
MW-2A 75-71-8 Dichlorodifluoromethane 1 ug/l 1000 5 2/19/2008
MW-2A 75-71-8 Dichlorodifluoromethane 1 ug/l 1000 5 8/19/2008
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2A 75-71-8 Dichlorodifluoromethane 0.5 ug/l 1000 5 2/17/2009
MW-2A 75-71-8 Dichlorodifluoromethane 0.5 ug/l 1000 5 8/19/2009
MW-2A 75-71-8 Dichlorodifluoromethane 0.9 ug/l 1000 5 2/18/2010
MW-2A 75-71-8 Dichlorodifluoromethane 0.8 ug/l 1000 5 8/26/2015
MW-2A 88-85-7 Dinoseb 2.7 ug/l 7 1 2/2/1998
MW-2A 74-84-0 Ethane 0.14 ug/l NE NE 2/11/2015
MW-2A 74-84-0 Ethane 0.32 ug/l NE NE 8/26/2015
MW-2A 74-85-1 Ethene 0.27 ug/l NE NE 8/30/2012
MW-2A 74-85-1 Ethene 0.19 ug/l NE NE 2/11/2015
MW-2A 74-85-1 Ethene 0.49 ug/l NE NE 8/26/2015
MW-2A 1333-74-0 Hydrogen 0.567 nM NE NE 2/24/2011
MW-2A 1333-74-0 Hydrogen 3.5 nM NE NE 8/25/2011
MW-2A 1333-74-0 Hydrogen 1.4 nM NE NE 2/22/2012
MW-2A 1333-74-0 Hydrogen 4.8 nM NE NE 8/30/2012
MW-2A 1333-74-0 Hydrogen 0.81 nM NE NE 2/11/2015
MW-2A 1333-74-0 Hydrogen 2.9 nM NE NE 8/26/2015
MW-2A 50-21-5 Lactic Acid 260 ug/l NE NE 8/25/2011
MW-2A 50-21-5 Lactic Acid 500 ug/l NE NE 8/30/2012
MW-2A 50-21-5 Lactic Acid 200 ug/l NE NE 2/11/2015
MW-2A 50-21-5 Lactic Acid 14 ug/l NE NE 8/26/2015
MW-2A 7439-97-6 Mercury 0.00007 mg/l 1 0.2 2/19/2008
MW-2A 7439-97-6 Mercury 0.00011 mg/l 1 0.2 8/19/2008
MW-2A 7439-97-6 Mercury 0.09 ug/l 1 0.2 2/17/2009
MW-2A 7439-97-6 Mercury 0.06 ug/l 1 0.2 8/19/2009
MW-2A 7439-97-6 Mercury 0.04 ug/l 1 0.2 8/30/2012
MW-2A 7439-97-6 Mercury 0.02 ug/l 1 0.2 2/20/2013
MW-2A 74-82-8 Methane 0.009 ug/L NE NE 2/24/2011
MW-2A 74-82-8 Methane 8800 ug/l NE NE 8/25/2011
MW-2A 74-82-8 Methane 3900 ug/l NE NE 2/22/2012
MW-2A 74-82-8 Methane 5800 ug/l NE NE 8/30/2012
MW-2A 74-82-8 Methane 2600 ug/l NE NE 2/11/2015
MW-2A 74-82-8 Methane 3000 ug/l NE NE 8/26/2015
MW-2A 79-09-4 Propionic Acid 79 ug/l NE NE 8/25/2011
MW-2A 127-18-4 Tetrachloroethene 0.5 ug/l 0.7 1 2/19/2008
MW-2A 127-18-4 Tetrachloroethene 0.4 ug/l 0.7 1 2/18/2010
MW-2A 108-88-3 Toluene 0.4 ug/l 600 1 2/7/2002
MW-2A 108-88-3 Toluene 0.4 ug/l 600 1 8/9/2007
MW-2A 108-88-3 Toluene 0.3 ug/l 600 1 2/19/2008
MW-2A 156-60-5 trans-1,2-Dichloroethene 24 ug/l 100 5 2/15/1996
MW-2A 156-60-5 trans-1,2-Dichloroethene 18 ug/l 100 5 8/8/1996
MW-2A 156-60-5 trans-1,2-Dichloroethene 0.2 ug/l 100 5 2/19/2008
MW-2A 156-60-5 trans-1,2-Dichloroethene 0.2 ug/l 100 5 8/19/2008
MW-2A 156-60-5 trans-1,2-Dichloroethene 0.3 ug/l 100 5 2/11/2015
MW-2A 79-01-6 Trichloroethene 15 ug/l 3 1 8/9/1995
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2A 79-01-6 Trichloroethene 25 ug/l 3 1 12/4/1995
MW-2A 79-01-6 Trichloroethene 25 ug/l 3 1 2/15/1996
MW-2A 79-01-6 Trichloroethene 16 ug/l 3 1 8/8/1996
MW-2A 79-01-6 Trichloroethene 21 ug/l 3 1 2/25/1997
MW-2A 79-01-6 Trichloroethene 6.5 ug/l 3 1 8/18/1997
MW-2A 79-01-6 Trichloroethene 5.4 ug/l 3 1 9/10/1998
MW-2A 79-01-6 Trichloroethene 8.2 ug/l 3 1 2/25/1999
MW-2A 79-01-6 Trichloroethene 9.2 ug/l 3 1 10/7/1999
MW-2A 79-01-6 Trichloroethene 5.8 ug/l 3 1 2/2/2000
MW-2A 79-01-6 Trichloroethene 0.6 ug/l 3 1 2/7/2002
MW-2A 79-01-6 Trichloroethene 10.3 ug/l 3 1 2/24/2004
MW-2A 79-01-6 Trichloroethene 5.2 ug/l 3 1 2/15/2005
MW-2A 79-01-6 Trichloroethene 5.1 ug/l 3 1 2/14/2007
MW-2A 79-01-6 Trichloroethene 0.6 ug/l 3 1 8/9/2007
MW-2A 79-01-6 Trichloroethene 5.6 ug/l 3 1 2/19/2008
MW-2A 79-01-6 Trichloroethene 4 ug/l 3 1 8/19/2008
MW-2A 79-01-6 Trichloroethene 2.6 ug/l 3 1 2/17/2009
MW-2A 79-01-6 Trichloroethene 2 ug/l 3 1 8/19/2009
MW-2A 79-01-6 Trichloroethene 7.3 ug/l 3 1 2/18/2010
MW-2A 79-01-6 Trichloroethene 0.6 ug/l 3 1 8/25/2010
MW-2A 79-01-6 Trichloroethene 0.3 ug/l 3 1 2/22/2011
MW-2A 79-01-6 Trichloroethene 2.4 ug/l 3 1 2/11/2015
MW-2A 79-01-6 Trichloroethene 0.4 ug/l 3 1 8/26/2015
MW-2A 79-01-6 Trichloroethene 1 ug/l 3 1 2/9/2016
MW-2A 75-01-4 Vinyl chloride 1.8 ug/l 0.03 1 2/7/2002
MW-2A 75-01-4 Vinyl chloride 1.8 ug/l 0.03 1 8/9/2007
MW-2A 75-01-4 Vinyl chloride 3.3 ug/l 0.03 1 2/19/2008
MW-2A 75-01-4 Vinyl chloride 8 ug/l 0.03 1 8/19/2008
MW-2A 75-01-4 Vinyl Chloride 3.3 ug/l 0.03 1 2/17/2009
MW-2A 75-01-4 Vinyl Chloride 4.9 ug/l 0.03 1 8/19/2009
MW-2A 75-01-4 Vinyl Chloride 5.2 ug/l 0.03 1 2/18/2010
MW-2A 75-01-4 Vinyl Chloride 5.4 ug/l 0.03 1 8/25/2010
MW-2A 75-01-4 Vinyl Chloride 3.6 ug/l 0.03 1 2/22/2011
MW-2A 75-01-4 Vinyl Chloride 1.2 ug/l 0.03 1 8/25/2011
MW-2A 75-01-4 Vinyl Chloride 3.7 ug/l 0.03 1 8/30/2012
MW-2A 75-01-4 Vinyl Chloride 5 ug/l 0.03 1 2/20/2013
MW-2A 75-01-4 Vinyl Chloride 2.7 ug/l 0.03 1 8/29/2013
MW-2A 75-01-4 Vinyl Chloride 2.3 ug/l 0.03 1 2/25/2014
MW-2A 75-01-4 Vinyl Chloride 1.3 ug/l 0.03 1 8/6/2014
MW-2A 75-01-4 Vinyl Chloride 9.3 ug/l 0.03 1 2/11/2015
MW-2A 75-01-4 Vinyl Chloride 13.5 ug/l 0.03 1 8/26/2015
MW-2A 75-01-4 Vinyl Chloride 11.1 ug/l 0.03 1 2/9/2016
MW-2AD 75-34-3 1,1-Dichloroethane 13 ug/l 6 5 2/2/2000
MW-2AD 75-34-3 1,1-Dichloroethane 12 ug/l 6 5 5/2/2000
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2AD 75-34-3 1,1-Dichloroethane 19 ug/l 6 5 8/10/2000
MW-2AD 75-34-3 1,1-Dichloroethane 26 ug/l 6 5 2/6/2001
MW-2AD 75-34-3 1,1-Dichloroethane 13 ug/l 6 5 8/7/2001
MW-2AD 75-34-3 1,1-Dichloroethane 6.6 ug/l 6 5 2/7/2002
MW-2AD 75-34-3 1,1-Dichloroethane 36.8 ug/l 6 5 2/7/2002
MW-2AD 75-34-3 1,1-Dichloroethane 7.5 ug/l 6 5 8/14/2002
MW-2AD 75-34-3 1,1-Dichloroethane 9.9 ug/l 6 5 2/12/2003
MW-2AD 75-34-3 1,1-Dichloroethane 14.4 ug/l 6 5 8/7/2003
MW-2AD 75-34-3 1,1-Dichloroethane 27.3 ug/l 6 5 2/24/2004
MW-2AD 75-34-3 1,1-Dichloroethane 31.5 ug/l 6 5 8/12/2004
MW-2AD 75-34-3 1,1-Dichloroethane 20.6 ug/l 6 5 2/15/2005
MW-2AD 75-34-3 1,1-Dichloroethane 30.4 ug/l 6 5 8/16/2005
MW-2AD 75-34-3 1,1-Dichloroethane 27.2 ug/l 6 5 2/14/2006
MW-2AD 75-34-3 1,1-Dichloroethane 26.6 ug/l 6 5 8/22/2006
MW-2AD 75-34-3 1,1-Dichloroethane 31.4 ug/l 6 5 2/14/2007
MW-2AD 75-34-3 1,1-Dichloroethane 36.8 ug/l 6 5 8/9/2007
MW-2AD 75-34-3 1,1-Dichloroethane 29 ug/l 6 5 2/19/2008
MW-2AD 75-34-3 1,1-Dichloroethane 31.4 ug/l 6 5 8/19/2008
MW-2AD 75-34-3 1,1-Dichloroethane 28.4 ug/l 6 5 2/17/2009
MW-2AD 75-34-3 1,1-Dichloroethane 25.5 ug/l 6 5 8/19/2009
MW-2AD 75-34-3 1,1-Dichloroethane 21.8 ug/l 6 5 2/18/2010
MW-2AD 75-34-3 1,1-Dichloroethane 25.1 ug/l 6 5 8/25/2010
MW-2AD 75-34-3 1,1-Dichloroethane 17.8 ug/l 6 5 2/22/2011
MW-2AD 75-34-3 1,1-Dichloroethane 6.6 ug/l 6 5 8/25/2011
MW-2AD 75-34-3 1,1-Dichloroethane 5 ug/l 6 5 2/22/2012
MW-2AD 75-34-3 1,1-Dichloroethane 1.9 ug/l 6 5 8/30/2012
MW-2AD 75-34-3 1,1-Dichloroethane 7.3 ug/l 6 5 2/20/2013
MW-2AD 75-34-3 1,1-Dichloroethane 7.9 ug/l 6 5 8/29/2013
MW-2AD 75-34-3 1,1-Dichloroethane 8.4 ug/l 6 5 2/25/2014
MW-2AD 75-34-3 1,1-Dichloroethane 13.1 ug/l 6 5 8/6/2014
MW-2AD 75-34-3 1,1-Dichloroethane 6.4 ug/l 6 5 2/11/2015
MW-2AD 75-34-3 1,1-Dichloroethane 22.4 ug/l 6 5 8/26/2015
MW-2AD 75-34-3 1,1-Dichloroethane 10.2 ug/l 6 5 2/9/2016
MW-2AD 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/7/2002
MW-2AD 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 8/9/2007
MW-2AD 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 2/19/2008
MW-2AD 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/19/2008
MW-2AD 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/17/2009
MW-2AD 75-35-4 1,1-Dichloroethene 0.5 ug/l 7 5 8/19/2009
MW-2AD 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 2/18/2010
MW-2AD 75-35-4 1,1-Dichloroethene 0.5 ug/l 7 5 8/25/2010
MW-2AD 75-35-4 1,1-Dichloroethene 0.6 ug/l 7 5 2/22/2011
MW-2AD 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/25/2011
MW-2AD 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 8/26/2015
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2AD 107-06-2 1,2-Dichloroethane 0.4 ug/l 20 1 2/7/2002
MW-2AD 107-06-2 1,2-Dichloroethane 0.4 ug/l 20 1 8/9/2007
MW-2AD 107-06-2 1,2-Dichloroethane 0.2 ug/l 20 1 2/19/2008
MW-2AD 107-06-2 1,2-Dichloroethane 0.2 ug/l 20 1 8/19/2008
MW-2AD 107-06-2 1,2-Dichloroethane 0.3 ug/l 20 1 2/17/2009
MW-2AD 107-06-2 1,2-Dichloroethane 0.4 ug/l 20 1 8/19/2009
MW-2AD 107-06-2 1,2-Dichloroethane 0.3 ug/l 20 1 8/25/2010
MW-2AD 107-06-2 1,2-Dichloroethane 0.3 ug/l 20 1 2/22/2011
MW-2AD 78-87-5 1,2-Dichloropropane 0.2 ug/l 0.6 1 2/7/2002
MW-2AD 78-87-5 1,2-Dichloropropane 0.2 ug/l 0.6 1 8/9/2007
MW-2AD 78-87-5 1,2-Dichloropropane 0.2 ug/l 0.6 1 2/19/2008
MW-2AD 78-87-5 1,2-Dichloropropane 0.2 ug/l 0.6 1 2/17/2009
MW-2AD 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 8/25/2010
MW-2AD 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 8/6/2014
MW-2AD 78-87-5 1,2-Dichloropropane 1.3 ug/l 0.6 1 2/11/2015
MW-2AD 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 8/26/2015
MW-2AD 106-46-7 1,4-Dichlorobenzene 0.7 ug/l 6 1 2/7/2002
MW-2AD 106-46-7 1,4-Dichlorobenzene 0.7 ug/l 6 1 8/9/2007
MW-2AD 106-46-7 1,4-Dichlorobenzene 0.7 ug/l 6 1 2/19/2008
MW-2AD 106-46-7 1,4-Dichlorobenzene 0.7 ug/l 6 1 8/19/2008
MW-2AD 106-46-7 1,4-Dichlorobenzene 1.1 ug/l 6 1 2/17/2009
MW-2AD 106-46-7 1,4-Dichlorobenzene 1.3 ug/l 6 1 8/19/2009
MW-2AD 106-46-7 1,4-Dichlorobenzene 1.3 ug/l 6 1 2/18/2010
MW-2AD 106-46-7 1,4-Dichlorobenzene 1.4 ug/l 6 1 8/25/2010
MW-2AD 106-46-7 1,4-Dichlorobenzene 1.3 ug/l 6 1 2/22/2011
MW-2AD 106-46-7 1,4-Dichlorobenzene 0.4 ug/l 6 1 8/25/2011
MW-2AD 106-46-7 1,4-Dichlorobenzene 0.5 ug/l 6 1 2/20/2013
MW-2AD 106-46-7 1,4-Dichlorobenzene 1 ug/l 6 1 8/29/2013
MW-2AD 106-46-7 1,4-Dichlorobenzene 1.3 ug/l 6 1 2/25/2014
MW-2AD 106-46-7 1,4-Dichlorobenzene 2.5 ug/l 6 1 8/6/2014
MW-2AD 106-46-7 1,4-Dichlorobenzene 1.3 ug/l 6 1 2/11/2015
MW-2AD 106-46-7 1,4-Dichlorobenzene 1.7 ug/l 6 1 8/26/2015
MW-2AD 106-46-7 1,4-Dichlorobenzene 0.9 ug/l 6 1 2/9/2016
MW-2AD 78-93-3 2-Butanone (Methyl ethyl ketone) 1.7 ug/l 4000 100 2/7/2002
MW-2AD 78-93-3 2-Butanone (Methyl ethyl ketone) 1.7 ug/l 4000 100 8/9/2007
MW-2AD 78-93-3 2-Butanone (Methyl ethyl ketone) 4 ug/l 4000 100 8/19/2008
MW-2AD 78-93-3 2-Butanone (Methyl ethyl ketone) 2.1 ug/l 4000 100 8/19/2009
MW-2AD 64-19-7 Acetic Acid 41 ug/L NE NE 2/24/2011
MW-2AD 64-19-7 Acetic Acid 86 ug/l NE NE 8/25/2011
MW-2AD 64-19-7 Acetic Acid 56 ug/l NE NE 2/11/2015
MW-2AD 64-19-7 Acetic Acid 39 ug/l NE NE 8/26/2015
MW-2AD 67-64-1 Acetone 5.3 ug/l 6000 100 2/19/2008
MW-2AD 67-64-1 Acetone 5.6 ug/l 6000 100 8/19/2008
MW-2AD 67-64-1 Acetone 1.8 ug/l 6000 100 8/19/2009
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2AD 71-43-2 Benzene 0.9 ug/l 1 1 2/7/2002
MW-2AD 71-43-2 Benzene 0.9 ug/l 1 1 8/9/2007
MW-2AD 71-43-2 Benzene 1.3 ug/l 1 1 2/19/2008
MW-2AD 71-43-2 Benzene 1.2 ug/l 1 1 8/19/2008
MW-2AD 71-43-2 Benzene 0.7 ug/l 1 1 2/17/2009
MW-2AD 71-43-2 Benzene 0.8 ug/l 1 1 8/19/2009
MW-2AD 71-43-2 Benzene 1.4 ug/l 1 1 2/18/2010
MW-2AD 71-43-2 Benzene 0.9 ug/l 1 1 8/25/2010
MW-2AD 71-43-2 Benzene 0.7 ug/l 1 1 2/22/2011
MW-2AD 71-43-2 Benzene 0.3 ug/l 1 1 2/22/2012
MW-2AD 71-43-2 Benzene 0.4 ug/l 1 1 2/20/2013
MW-2AD 71-43-2 Benzene 0.5 ug/l 1 1 8/29/2013
MW-2AD 71-43-2 Benzene 0.5 ug/l 1 1 2/25/2014
MW-2AD 71-43-2 Benzene 0.8 ug/l 1 1 8/6/2014
MW-2AD 71-43-2 Benzene 0.4 ug/l 1 1 2/11/2015
MW-2AD 71-43-2 Benzene 1.2 ug/l 1 1 8/26/2015
MW-2AD 71-43-2 Benzene 0.4 ug/l 1 1 2/9/2016
MW-2AD 117-81-7 Bis-(2-Ethylhexyl) Phthalate 25 ug/l 3 15 8/10/2000
MW-2AD 117-81-7 Bis-(2-Ethylhexyl) Phthalate 13.3 ug/l 3 15 2/18/2010
MW-2AD 117-81-7 Bis-(2-Ethylhexyl) Phthalate 117 ug/l 3 15 2/20/2013
MW-2AD 107-92-6 Butyric Acid 21 ug/l NE NE 8/26/2015
MW-2AD 124-38-9 Carbon Dioxide 210 mg/l NE NE 8/19/2009
MW-2AD 124-38-9 Carbon Dioxide 200 mg/l NE NE 2/18/2010
MW-2AD 124-38-9 Carbon Dioxide 171000 ug/l NE 1000 8/25/2010
MW-2AD 124-38-9 Carbon Dioxide 118000 ug/l NE 1000 2/22/2011
MW-2AD 124-38-9 Carbon Dioxide 95000 ug/l NE 1000 8/25/2011
MW-2AD 124-38-9 Carbon Dioxide 54000 ug/l NE 1000 2/22/2012
MW-2AD 124-38-9 Carbon Dioxide 79000 ug/l NE 1000 8/30/2012
MW-2AD 124-38-9 Carbon Dioxide 32000 ug/l NE 1000 2/11/2015
MW-2AD 124-38-9 Carbon Dioxide 122000 ug/l NE 1000 8/26/2015
MW-2AD 16887-00-6 Chloride 7 mg/l 250 5 8/19/2009
MW-2AD 16887-00-6 Chloride 6 mg/l 250 5 2/18/2010
MW-2AD 16887-00-6 Chloride 5000 ug/l 250000 5000 8/25/2010
MW-2AD 16887-00-6 Chloride 6000 ug/l 250000 5000 2/22/2011
MW-2AD 16887-00-6 Chloride 5000 ug/l 250000 5000 8/25/2011
MW-2AD 16887-00-6 Chloride 5000 ug/l 250000 5000 2/22/2012
MW-2AD 16887-00-6 Chloride 8000 ug/l 250000 5000 8/30/2012
MW-2AD 16887-00-6 Chloride 8000 ug/l 250000 5000 2/20/2013
MW-2AD 16887-00-6 Chloride 7000 ug/l 250000 5000 8/29/2013
MW-2AD 16887-00-6 Chloride 7000 ug/l 250000 5000 2/25/2014
MW-2AD 16887-00-6 Chloride 8000 ug/l 250000 5000 8/6/2014
MW-2AD 16887-00-6 Chloride 8000 ug/l 250000 5000 2/11/2015
MW-2AD 16887-00-6 Chloride 10000 ug/l 250000 5000 8/26/2015
MW-2AD 16887-00-6 Chloride 6000 ug/l 250000 5000 2/9/2016
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2AD 16887-00-6 Chloride 12000 ug/l 250000 5000 2/14/2017
MW-2AD 108-90-7 Chlorobenzene 1.1 ug/l 50 3 2/7/2002
MW-2AD 108-90-7 Chlorobenzene 1.1 ug/l 50 3 8/9/2007
MW-2AD 108-90-7 Chlorobenzene 0.9 ug/l 50 3 2/19/2008
MW-2AD 108-90-7 Chlorobenzene 0.9 ug/l 50 3 8/19/2008
MW-2AD 108-90-7 Chlorobenzene 1.2 ug/l 50 3 2/17/2009
MW-2AD 108-90-7 Chlorobenzene 1.5 ug/l 50 3 8/19/2009
MW-2AD 108-90-7 Chlorobenzene 1.6 ug/l 50 3 2/18/2010
MW-2AD 108-90-7 Chlorobenzene 2.2 ug/l 50 3 8/25/2010
MW-2AD 108-90-7 Chlorobenzene 2.4 ug/l 50 3 2/22/2011
MW-2AD 108-90-7 Chlorobenzene 1.4 ug/l 50 3 8/25/2011
MW-2AD 108-90-7 Chlorobenzene 1 ug/l 50 3 2/22/2012
MW-2AD 108-90-7 Chlorobenzene 0.5 ug/l 50 3 8/30/2012
MW-2AD 108-90-7 Chlorobenzene 1.5 ug/l 50 3 2/20/2013
MW-2AD 108-90-7 Chlorobenzene 2.2 ug/l 50 3 8/29/2013
MW-2AD 108-90-7 Chlorobenzene 2.4 ug/l 50 3 2/25/2014
MW-2AD 108-90-7 Chlorobenzene 4.1 ug/l 50 3 8/6/2014
MW-2AD 108-90-7 Chlorobenzene 2.5 ug/l 50 3 2/11/2015
MW-2AD 108-90-7 Chlorobenzene 1.2 ug/l 50 3 8/26/2015
MW-2AD 108-90-7 Chlorobenzene 0.5 ug/l 50 3 2/9/2016
MW-2AD 75-00-3 Chloroethane 2.5 ug/l 3000 10 2/7/2002
MW-2AD 75-00-3 Chloroethane 2.5 ug/l 3000 10 8/9/2007
MW-2AD 75-00-3 Chloroethane 2.5 ug/l 3000 10 2/19/2008
MW-2AD 75-00-3 Chloroethane 2.4 ug/l 3000 10 8/19/2008
MW-2AD 75-00-3 Chloroethane 2.2 ug/l 3000 10 2/17/2009
MW-2AD 75-00-3 Chloroethane 1.9 ug/l 3000 10 8/19/2009
MW-2AD 75-00-3 Chloroethane 1.7 ug/l 3000 10 2/18/2010
MW-2AD 75-00-3 Chloroethane 2.3 ug/l 3000 10 8/25/2010
MW-2AD 75-00-3 Chloroethane 1.6 ug/l 3000 10 2/22/2011
MW-2AD 75-00-3 Chloroethane 0.7 ug/l 3000 10 8/25/2011
MW-2AD 75-00-3 Chloroethane 0.7 ug/l 3000 10 2/25/2014
MW-2AD 75-00-3 Chloroethane 1.4 ug/l 3000 10 8/6/2014
MW-2AD 75-00-3 Chloroethane 1 ug/l 3000 10 8/26/2015
MW-2AD 74-87-3 Chloromethane 0.3 ug/l 3 1 2/19/2008
MW-2AD 74-87-3 Chloromethane 0.3 ug/l 3 1 8/19/2008
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 22.9 ug/l 70 5 2/7/2002
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 11.8 ug/l 70 5 8/12/2004
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 5.2 ug/l 70 5 2/15/2005
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 13.6 ug/l 70 5 8/16/2005
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 11 ug/l 70 5 2/14/2006
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 16 ug/l 70 5 8/22/2006
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 10.2 ug/l 70 5 2/14/2007
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 22.9 ug/l 70 5 8/9/2007
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 11 ug/l 70 5 2/19/2008
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 12.6 ug/l 70 5 8/19/2008
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 19.9 ug/l 70 5 2/17/2009
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 22.2 ug/l 70 5 8/19/2009
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 12.66 ug/l 70 5 2/18/2010
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 23.8 ug/l 70 5 8/25/2010
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 21.7 ug/l 70 5 2/22/2011
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 9.4 ug/l 70 5 8/25/2011
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 6.2 ug/l 70 5 2/22/2012
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 2 ug/l 70 5 8/30/2012
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 10 ug/l 70 5 2/20/2013
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 10.5 ug/l 70 5 8/29/2013
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 10.1 ug/l 70 5 2/25/2014
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 15.6 ug/l 70 5 8/6/2014
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 7.9 ug/l 70 5 2/11/2015
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 33.3 ug/l 70 5 8/26/2015
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 19.6 ug/l 70 5 2/9/2016
MW-2AD 156-59-2 Cis-1,2-Dichloroethene 0.3 ug/l 70 5 2/14/2017
MW-2AD 319-86-8 Delta-BHC 0.043 ug/l 0.019 0.05 2/19/2008
MW-2AD 75-71-8 Dichlorodifluoromethane 0.3 ug/l 1000 5 2/7/2002
MW-2AD 75-71-8 Dichlorodifluoromethane 0.3 ug/l 1000 5 8/9/2007
MW-2AD 75-71-8 Dichlorodifluoromethane 1 ug/l 1000 5 2/19/2008
MW-2AD 75-71-8 Dichlorodifluoromethane 0.5 ug/l 1000 5 8/19/2008
MW-2AD 75-71-8 Dichlorodifluoromethane 0.3 ug/l 1000 5 2/17/2009
MW-2AD 75-71-8 Dichlorodifluoromethane 0.2 ug/l 1000 5 8/19/2009
MW-2AD 75-71-8 Dichlorodifluoromethane 0.9 ug/l 1000 5 2/18/2010
MW-2AD 75-71-8 Dichlorodifluoromethane 1.3 ug/l 1000 5 8/26/2015
MW-2AD 75-71-8 Dichlorodifluoromethane 0.7 ug/l 1000 5 2/9/2016
MW-2AD 88-85-7 Dinoseb 1.5 ug/l 7 1 10/7/1999
MW-2AD 88-85-7 Dinoseb 2.6 ug/l 7 1 2/2/2000
MW-2AD 74-84-0 Ethane 0.13 ug/L NE NE 2/24/2011
MW-2AD 74-84-0 Ethane 0.054 ug/l NE NE 8/25/2011
MW-2AD 74-84-0 Ethane 0.03 ug/l NE NE 2/22/2012
MW-2AD 74-84-0 Ethane 0.052 ug/l NE NE 8/30/2012
MW-2AD 74-84-0 Ethane 0.0047 ug/l NE NE 2/11/2015
MW-2AD 74-84-0 Ethane 1.3 ug/l NE NE 8/26/2015
MW-2AD 74-85-1 Ethene 0.15 ug/L NE NE 2/24/2011
MW-2AD 74-85-1 Ethene 0.1 ug/l NE NE 8/25/2011
MW-2AD 74-85-1 Ethene 0.058 ug/l NE NE 2/22/2012
MW-2AD 74-85-1 Ethene 0.28 ug/l NE NE 8/30/2012
MW-2AD 74-85-1 Ethene 0.013 ug/l NE NE 2/11/2015
MW-2AD 74-85-1 Ethene 3.2 ug/l NE NE 8/26/2015
MW-2AD 58-89-9 Gamma-BHC (Lindane) 0.073 ug/l 0.03 0.05 2/22/2011
MW-2AD 1333-74-0 Hydrogen 2 nM NE NE 2/24/2011
MW-2AD 1333-74-0 Hydrogen 3.4 nM NE NE 8/25/2011
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2AD 1333-74-0 Hydrogen 0.75 nM NE NE 2/22/2012
MW-2AD 1333-74-0 Hydrogen 4.7 nM NE NE 8/30/2012
MW-2AD 1333-74-0 Hydrogen 1.6 nM NE NE 2/11/2015
MW-2AD 1333-74-0 Hydrogen 2.7 nM NE NE 8/26/2015
MW-2AD 50-21-5 Lactic Acid 260 ug/L NE NE 2/24/2011
MW-2AD 50-21-5 Lactic Acid 160 ug/l NE NE 8/25/2011
MW-2AD 50-21-5 Lactic Acid 210 ug/l NE NE 2/11/2015
MW-2AD 50-21-5 Lactic Acid 18 ug/l NE NE 8/26/2015
MW-2AD 7439-97-6 Mercury 0.00006 mg/l 1 0.2 2/7/2002
MW-2AD 7439-97-6 Mercury 0.00006 mg/l 1 0.2 8/9/2007
MW-2AD 7439-97-6 Mercury 0.00004 mg/l 1 0.2 2/19/2008
MW-2AD 7439-97-6 Mercury 0.00013 mg/l 1 0.2 8/19/2008
MW-2AD 7439-97-6 Mercury 0.07 ug/l 1 0.2 2/17/2009
MW-2AD 7439-97-6 Mercury 0.11 ug/l 1 0.2 8/19/2009
MW-2AD 7439-97-6 Mercury 0.07 ug/l 1 0.2 8/30/2012
MW-2AD 7439-97-6 Mercury 0.03 ug/l 1 0.2 2/20/2013
MW-2AD 74-82-8 Methane 340 ug/L NE NE 2/24/2011
MW-2AD 74-82-8 Methane 670 ug/l NE NE 8/25/2011
MW-2AD 74-82-8 Methane 230 ug/l NE NE 2/22/2012
MW-2AD 74-82-8 Methane 700 ug/l NE NE 8/30/2012
MW-2AD 74-82-8 Methane 0.47 ug/l NE NE 2/11/2015
MW-2AD 74-82-8 Methane 1600 ug/l NE NE 8/26/2015
MW-2AD 75-09-2 Methylene Chloride 0.2 ug/l 5 1 2/7/2002
MW-2AD 75-09-2 Methylene Chloride 0.2 ug/l 5 1 8/9/2007
MW-2AD 75-09-2 Methylene Chloride 0.3 ug/l 5 1 8/19/2008
MW-2AD 75-09-2 Methylene Chloride 0.2 ug/l 5 1 2/17/2009
MW-2AD 75-09-2 Methylene Chloride 0.2 ug/l 5 1 8/19/2009
MW-2AD 79-09-4 Propionic Acid 78 ug/l NE NE 8/25/2011
MW-2AD 127-18-4 Tetrachloroethene 0.3 ug/l 0.7 1 2/19/2008
MW-2AD 127-18-4 Tetrachloroethene 1.7 ug/l 0.7 1 8/26/2015
MW-2AD 127-18-4 Tetrachloroethene 0.5 ug/l 0.7 1 2/9/2016
MW-2AD 108-88-3 Toluene 0.5 ug/l 600 1 2/7/2002
MW-2AD 108-88-3 Toluene 0.5 ug/l 600 1 8/9/2007
MW-2AD 108-88-3 Toluene 0.3 ug/l 600 1 2/19/2008
MW-2AD 156-60-5 trans-1,2-Dichloroethene 0.3 ug/l 100 5 2/7/2002
MW-2AD 156-60-5 trans-1,2-Dichloroethene 0.3 ug/l 100 5 8/9/2007
MW-2AD 156-60-5 trans-1,2-Dichloroethene 0.2 ug/l 100 5 2/19/2008
MW-2AD 156-60-5 trans-1,2-Dichloroethene 0.2 ug/l 100 5 8/19/2008
MW-2AD 156-60-5 trans-1,2-Dichloroethene 0.2 ug/l 100 5 2/17/2009
MW-2AD 156-60-5 trans-1,2-Dichloroethene 0.2 ug/l 100 5 8/19/2009
MW-2AD 156-60-5 trans-1,2-Dichloroethene 0.4 ug/l 100 5 8/26/2015
MW-2AD 79-01-6 Trichloroethene 5.4 ug/l 3 1 2/7/2002
MW-2AD 79-01-6 Trichloroethene 5.5 ug/l 3 1 8/12/2004
MW-2AD 79-01-6 Trichloroethene 5.4 ug/l 3 1 8/9/2007
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-2AD 79-01-6 Trichloroethene 3.2 ug/l 3 1 2/19/2008
MW-2AD 79-01-6 Trichloroethene 3.5 ug/l 3 1 8/19/2008
MW-2AD 79-01-6 Trichloroethene 4.1 ug/l 3 1 2/17/2009
MW-2AD 79-01-6 Trichloroethene 4.2 ug/l 3 1 8/19/2009
MW-2AD 79-01-6 Trichloroethene 3.4 ug/l 3 1 2/18/2010
MW-2AD 79-01-6 Trichloroethene 4.1 ug/l 3 1 8/25/2010
MW-2AD 79-01-6 Trichloroethene 3.4 ug/l 3 1 2/22/2011
MW-2AD 79-01-6 Trichloroethene 1.3 ug/l 3 1 8/25/2011
MW-2AD 79-01-6 Trichloroethene 1 ug/l 3 1 2/22/2012
MW-2AD 79-01-6 Trichloroethene 0.3 ug/l 3 1 8/30/2012
MW-2AD 79-01-6 Trichloroethene 1.8 ug/l 3 1 2/20/2013
MW-2AD 79-01-6 Trichloroethene 2.4 ug/l 3 1 8/29/2013
MW-2AD 79-01-6 Trichloroethene 2.1 ug/l 3 1 2/25/2014
MW-2AD 79-01-6 Trichloroethene 2.7 ug/l 3 1 8/6/2014
MW-2AD 79-01-6 Trichloroethene 10.2 ug/l 3 1 8/26/2015
MW-2AD 79-01-6 Trichloroethene 8 ug/l 3 1 2/9/2016
MW-2AD 75-01-4 Vinyl chloride 5.8 ug/l 0.03 1 2/7/2002
MW-2AD 75-01-4 Vinyl chloride 7 ug/l 0.03 1 2/14/2007
MW-2AD 75-01-4 Vinyl chloride 5.8 ug/l 0.03 1 8/9/2007
MW-2AD 75-01-4 Vinyl chloride 4.1 ug/l 0.03 1 2/19/2008
MW-2AD 75-01-4 Vinyl chloride 5.5 ug/l 0.03 1 8/19/2008
MW-2AD 75-01-4 Vinyl Chloride 5.2 ug/l 0.03 1 2/17/2009
MW-2AD 75-01-4 Vinyl Chloride 4.3 ug/l 0.03 1 8/19/2009
MW-2AD 75-01-4 Vinyl Chloride 5 ug/l 0.03 1 2/18/2010
MW-2AD 75-01-4 Vinyl Chloride 5 ug/l 0.03 1 8/25/2010
MW-2AD 75-01-4 Vinyl Chloride 3.3 ug/l 0.03 1 2/22/2011
MW-2AD 75-01-4 Vinyl Chloride 2.1 ug/l 0.03 1 8/25/2011
MW-2AD 75-01-4 Vinyl Chloride 1.2 ug/l 0.03 1 2/22/2012
MW-2AD 75-01-4 Vinyl Chloride 0.8 ug/l 0.03 1 8/30/2012
MW-2AD 75-01-4 Vinyl Chloride 3 ug/l 0.03 1 2/20/2013
MW-2AD 75-01-4 Vinyl Chloride 3.8 ug/l 0.03 1 8/29/2013
MW-2AD 75-01-4 Vinyl Chloride 2.7 ug/l 0.03 1 2/25/2014
MW-2AD 75-01-4 Vinyl Chloride 6.9 ug/l 0.03 1 8/6/2014
MW-2AD 75-01-4 Vinyl Chloride 23.7 ug/l 0.03 1 8/26/2015
MW-2AD 75-01-4 Vinyl Chloride 5 ug/l 0.03 1 2/9/2016
MW-3A 75-34-3 1,1-Dichloroethane 9 ug/l 6 5 8/8/1996
MW-3A 75-34-3 1,1-Dichloroethane 5.3 ug/l 6 5 8/18/1997
MW-3A 75-34-3 1,1-Dichloroethane 18 ug/l 6 5 2/2/1998
MW-3A 75-34-3 1,1-Dichloroethane 5.6 ug/l 6 5 9/10/1998
MW-3A 75-34-3 1,1-Dichloroethane 17 ug/l 6 5 2/25/1999
MW-3A 75-34-3 1,1-Dichloroethane 25 ug/l 6 5 2/2/2000
MW-3A 75-34-3 1,1-Dichloroethane 29 ug/l 6 5 8/10/2000
MW-3A 75-34-3 1,1-Dichloroethane 20 ug/l 6 5 8/7/2001
MW-3A 75-34-3 1,1-Dichloroethane 5.6 ug/l 6 5 2/7/2002
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3A 75-34-3 1,1-Dichloroethane 21 ug/l 6 5 2/7/2002
MW-3A 75-34-3 1,1-Dichloroethane 8.9 ug/l 6 5 8/14/2002
MW-3A 75-34-3 1,1-Dichloroethane 13.2 ug/l 6 5 2/12/2003
MW-3A 75-34-3 1,1-Dichloroethane 11.9 ug/l 6 5 8/7/2003
MW-3A 75-34-3 1,1-Dichloroethane 10.5 ug/l 6 5 2/24/2004
MW-3A 75-34-3 1,1-Dichloroethane 11.3 ug/l 6 5 8/12/2004
MW-3A 75-34-3 1,1-Dichloroethane 7.1 ug/l 6 5 2/15/2005
MW-3A 75-34-3 1,1-Dichloroethane 7.3 ug/l 6 5 8/16/2005
MW-3A 75-34-3 1,1-Dichloroethane 8.4 ug/l 6 5 2/14/2006
MW-3A 75-34-3 1,1-Dichloroethane 8.3 ug/l 6 5 8/22/2006
MW-3A 75-34-3 1,1-Dichloroethane 6.6 ug/l 6 5 2/14/2007
MW-3A 75-34-3 1,1-Dichloroethane 5.6 ug/l 6 5 8/9/2007
MW-3A 75-34-3 1,1-Dichloroethane 7.1 ug/l 6 5 2/19/2008
MW-3A 75-34-3 1,1-Dichloroethane 6.2 ug/l 6 5 8/19/2008
MW-3A 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 2/7/2002
MW-3A 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 8/9/2007
MW-3A 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 2/19/2008
MW-3A 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/19/2008
MW-3A 107-06-2 1,2-Dichloroethane 7 ug/l 20 1 2/25/1997
MW-3A 107-06-2 1,2-Dichloroethane 0.2 ug/l 20 1 2/19/2008
MW-3A 107-06-2 1,2-Dichloroethane 0.2 ug/l 20 1 8/19/2008
MW-3A 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 2/7/2002
MW-3A 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 8/9/2007
MW-3A 78-87-5 1,2-Dichloropropane 1.1 ug/l 0.6 1 2/19/2008
MW-3A 78-87-5 1,2-Dichloropropane 0.8 ug/l 0.6 1 8/19/2008
MW-3A 106-46-7 1,4-Dichlorobenzene 0.4 ug/l 6 1 2/7/2002
MW-3A 106-46-7 1,4-Dichlorobenzene 0.4 ug/l 6 1 8/9/2007
MW-3A 106-46-7 1,4-Dichlorobenzene 7.3 ug/l 6 1 2/19/2008
MW-3A 106-46-7 1,4-Dichlorobenzene 2.6 ug/l 6 1 8/19/2008
MW-3A 94-75-7 2,4-D 3.8 ug/l 70 2 2/12/2003
MW-3A 94-75-7 2,4-D 2.7 ug/l 70 2 8/7/2003
MW-3A 78-93-3 2-Butanone (Methyl ethyl ketone) 2.2 ug/l 4000 100 2/7/2002
MW-3A 78-93-3 2-Butanone (Methyl ethyl ketone) 2.2 ug/l 4000 100 8/9/2007
MW-3A 78-93-3 2-Butanone (Methyl ethyl ketone) 4.6 ug/l 4000 100 8/19/2008
MW-3A 67-64-1 Acetone 1.4 ug/l 6000 100 2/7/2002
MW-3A 67-64-1 Acetone 1.4 ug/l 6000 100 8/9/2007
MW-3A 67-64-1 Acetone 2.7 ug/l 6000 100 2/19/2008
MW-3A 67-64-1 Acetone 6.6 ug/l 6000 100 8/19/2008
MW-3A 71-43-2 Benzene 10 ug/l 1 1 2/2/1998
MW-3A 71-43-2 Benzene 7.8 ug/l 1 1 8/10/2000
MW-3A 71-43-2 Benzene 0.8 ug/l 1 1 2/7/2002
MW-3A 71-43-2 Benzene 5.2 ug/l 1 1 2/7/2002
MW-3A 71-43-2 Benzene 6.1 ug/l 1 1 8/12/2004
MW-3A 71-43-2 Benzene 0.8 ug/l 1 1 8/9/2007
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3A 71-43-2 Benzene 2.6 ug/l 1 1 2/19/2008
MW-3A 71-43-2 Benzene 2.1 ug/l 1 1 8/19/2008
MW-3A 319-85-7 Beta-BHC 0.032 ug/l 0.019 0.05 2/19/2008
MW-3A 117-81-7 Bis-(2-Ethylhexyl) Phthalate 200 ug/l 3 15 2/25/1999
MW-3A 108-90-7 Chlorobenzene 5 ug/l 50 3 8/8/1996
MW-3A 108-90-7 Chlorobenzene 8.7 ug/l 50 3 2/2/2000
MW-3A 108-90-7 Chlorobenzene 28 ug/l 50 3 8/10/2000
MW-3A 108-90-7 Chlorobenzene 11 ug/l 50 3 8/7/2001
MW-3A 108-90-7 Chlorobenzene 0.6 ug/l 50 3 2/7/2002
MW-3A 108-90-7 Chlorobenzene 15 ug/l 50 3 2/7/2002
MW-3A 108-90-7 Chlorobenzene 12.4 ug/l 50 3 2/12/2003
MW-3A 108-90-7 Chlorobenzene 6.5 ug/l 50 3 8/7/2003
MW-3A 108-90-7 Chlorobenzene 7.2 ug/l 50 3 8/12/2004
MW-3A 108-90-7 Chlorobenzene 5.5 ug/l 50 3 2/15/2005
MW-3A 108-90-7 Chlorobenzene 5.6 ug/l 50 3 2/14/2007
MW-3A 108-90-7 Chlorobenzene 0.6 ug/l 50 3 8/9/2007
MW-3A 108-90-7 Chlorobenzene 3.7 ug/l 50 3 2/19/2008
MW-3A 108-90-7 Chlorobenzene 4.3 ug/l 50 3 8/19/2008
MW-3A 75-00-3 Chloroethane 11 ug/l 3000 10 2/2/2000
MW-3A 75-00-3 Chloroethane 0.7 ug/l 3000 10 2/7/2002
MW-3A 75-00-3 Chloroethane 0.7 ug/l 3000 10 8/9/2007
MW-3A 75-00-3 Chloroethane 1.5 ug/l 3000 10 2/19/2008
MW-3A 74-87-3 Chloromethane 0.2 ug/l 3 1 8/19/2008
MW-3A 156-59-2 Cis-1,2-Dichloroethene 33 ug/l 70 5 8/8/1996
MW-3A 156-59-2 Cis-1,2-Dichloroethene 27 ug/l 70 5 2/25/1997
MW-3A 156-59-2 Cis-1,2-Dichloroethene 17 ug/l 70 5 8/18/1997
MW-3A 156-59-2 Cis-1,2-Dichloroethene 70 ug/l 70 5 2/2/1998
MW-3A 156-59-2 Cis-1,2-Dichloroethene 9.9 ug/l 70 5 9/10/1998
MW-3A 156-59-2 Cis-1,2-Dichloroethene 31 ug/l 70 5 2/25/1999
MW-3A 156-59-2 Cis-1,2-Dichloroethene 44 ug/l 70 5 2/2/2000
MW-3A 156-59-2 Cis-1,2-Dichloroethene 89 ug/l 70 5 8/10/2000
MW-3A 156-59-2 Cis-1,2-Dichloroethene 52 ug/l 70 5 8/7/2001
MW-3A 156-59-2 Cis-1,2-Dichloroethene 8.1 ug/l 70 5 2/7/2002
MW-3A 156-59-2 Cis-1,2-Dichloroethene 84 ug/l 70 5 2/7/2002
MW-3A 156-59-2 Cis-1,2-Dichloroethene 24.8 ug/l 70 5 8/14/2002
MW-3A 156-59-2 Cis-1,2-Dichloroethene 56.5 ug/l 70 5 2/12/2003
MW-3A 156-59-2 Cis-1,2-Dichloroethene 57.3 ug/l 70 5 8/7/2003
MW-3A 156-59-2 Cis-1,2-Dichloroethene 46.8 ug/l 70 5 2/24/2004
MW-3A 156-59-2 Cis-1,2-Dichloroethene 43.2 ug/l 70 5 8/12/2004
MW-3A 156-59-2 Cis-1,2-Dichloroethene 27 ug/l 70 5 2/15/2005
MW-3A 156-59-2 Cis-1,2-Dichloroethene 11.8 ug/l 70 5 8/16/2005
MW-3A 156-59-2 Cis-1,2-Dichloroethene 17.1 ug/l 70 5 2/14/2006
MW-3A 156-59-2 Cis-1,2-Dichloroethene 5.8 ug/l 70 5 8/22/2006
MW-3A 156-59-2 Cis-1,2-Dichloroethene 8.1 ug/l 70 5 8/9/2007
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3A 156-59-2 Cis-1,2-Dichloroethene 10.8 ug/l 70 5 2/19/2008
MW-3A 156-59-2 Cis-1,2-Dichloroethene 5 ug/l 70 5 8/19/2008
MW-3A 75-71-8 Dichlorodifluoromethane 0.2 ug/l 1000 5 2/7/2002
MW-3A 75-71-8 Dichlorodifluoromethane 0.2 ug/l 1000 5 8/9/2007
MW-3A 75-71-8 Dichlorodifluoromethane 0.2 ug/l 1000 5 8/19/2008
MW-3A 76-44-8 Heptachlor 0.09 ug/l 0.008 0.05 2/2/1998
MW-3A 7439-97-6 Mercury 0.00004 mg/l 1 0.2 2/7/2002
MW-3A 7439-97-6 Mercury 0.00004 mg/l 1 0.2 8/9/2007
MW-3A 7439-97-6 Mercury 0.00008 mg/l 1 0.2 8/19/2008
MW-3A 75-09-2 Methylene Chloride 0.2 ug/l 5 1 8/19/2008
MW-3A 127-18-4 Tetrachloroethene 0.4 ug/l 0.7 1 2/7/2002
MW-3A 127-18-4 Tetrachloroethene 0.4 ug/l 0.7 1 8/9/2007
MW-3A 108-88-3 Toluene 0.5 ug/l 600 1 2/7/2002
MW-3A 108-88-3 Toluene 5.1 ug/l 600 1 8/16/2005
MW-3A 108-88-3 Toluene 0.5 ug/l 600 1 8/9/2007
MW-3A 108-88-3 Toluene 0.3 ug/l 600 1 2/19/2008
MW-3A 108-88-3 Toluene 0.2 ug/l 600 1 8/19/2008
MW-3A 156-60-5 trans-1,2-Dichloroethene 0.4 ug/l 100 5 2/19/2008
MW-3A 156-60-5 trans-1,2-Dichloroethene 0.2 ug/l 100 5 8/19/2008
MW-3A 79-01-6 Trichloroethene 6 ug/l 3 1 8/8/1996
MW-3A 79-01-6 Trichloroethene 7.9 ug/l 3 1 8/10/2000
MW-3A 79-01-6 Trichloroethene 2 ug/l 3 1 2/7/2002
MW-3A 79-01-6 Trichloroethene 8.7 ug/l 3 1 2/7/2002
MW-3A 79-01-6 Trichloroethene 7.7 ug/l 3 1 2/24/2004
MW-3A 79-01-6 Trichloroethene 2 ug/l 3 1 8/9/2007
MW-3A 79-01-6 Trichloroethene 1.9 ug/l 3 1 2/19/2008
MW-3A 79-01-6 Trichloroethene 1 ug/l 3 1 8/19/2008
MW-3A 75-01-4 Vinyl chloride 12 ug/l 0.03 1 2/2/2000
MW-3A 75-01-4 Vinyl chloride 4.7 ug/l 0.03 1 2/7/2002
MW-3A 75-01-4 Vinyl chloride 16.2 ug/l 0.03 1 2/12/2003
MW-3A 75-01-4 Vinyl chloride 16.3 ug/l 0.03 1 8/7/2003
MW-3A 75-01-4 Vinyl chloride 11.8 ug/l 0.03 1 2/24/2004
MW-3A 75-01-4 Vinyl chloride 16.1 ug/l 0.03 1 8/12/2004
MW-3A 75-01-4 Vinyl chloride 5.1 ug/l 0.03 1 2/14/2007
MW-3A 75-01-4 Vinyl chloride 4.7 ug/l 0.03 1 8/9/2007
MW-3A 75-01-4 Vinyl chloride 3.3 ug/l 0.03 1 2/19/2008
MW-3A 75-01-4 Vinyl chloride 3.9 ug/l 0.03 1 8/19/2008
MW-3AD 75-34-3 1,1-Dichloroethane 5.1 ug/l 6 5 2/17/2009
MW-3AD 75-34-3 1,1-Dichloroethane 6.5 ug/l 6 5 8/19/2009
MW-3AD 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 8/19/2009
MW-3AD 107-06-2 1,2-Dichloroethane 0.2 ug/l 20 1 2/17/2009
MW-3AD 78-87-5 1,2-Dichloropropane 1 ug/l 0.6 1 2/17/2009
MW-3AD 106-46-7 1,4-Dichlorobenzene 3.6 ug/l 6 1 2/17/2009
MW-3AD 78-93-3 2-Butanone (Methyl ethyl ketone) 1.2 ug/l 4000 100 8/19/2009
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3AD 71-43-2 Benzene 3.1 ug/l 1 1 2/17/2009
MW-3AD 71-43-2 Benzene 0.3 ug/l 1 1 8/19/2009
MW-3AD 124-38-9 Carbon Dioxide 112 mg/l NE NE 8/19/2009
MW-3AD 16887-00-6 Chloride 14 mg/l 250 5 8/19/2009
MW-3AD 108-90-7 Chlorobenzene 6.3 ug/l 50 3 2/17/2009
MW-3AD 108-90-7 Chlorobenzene 0.2 ug/l 50 3 8/19/2009
MW-3AD 75-00-3 Chloroethane 1.4 ug/l 3000 10 2/17/2009
MW-3AD 156-59-2 Cis-1,2-Dichloroethene 0.5 ug/l 70 5 2/17/2009
MW-3AD 156-59-2 Cis-1,2-Dichloroethene 3.3 ug/l 70 5 8/19/2009
MW-3AD 75-71-8 Dichlorodifluoromethane 1.4 ug/l 1000 5 8/19/2009
MW-3AD 7439-97-6 Mercury 0.03 ug/l 1 0.2 2/17/2009
MW-3AD 7439-97-6 Mercury 0.15 ug/l 1 0.2 8/19/2009
MW-3AD 75-09-2 Methylene Chloride 0.2 ug/l 5 1 8/19/2009
MW-3AD 127-18-4 Tetrachloroethene 2.1 ug/l 0.7 1 8/19/2009
MW-3AD 108-88-3 Toluene 0.4 ug/l 600 1 2/17/2009
MW-3AD 79-01-6 Trichloroethene 1.4 ug/l 3 1 8/19/2009
MW-3AD 75-01-4 Vinyl Chloride 1.3 ug/l 0.03 1 2/17/2009
MW-3AS 75-34-3 1,1-Dichloroethane 3.9 ug/l 6 5 8/19/2009
MW-3AS 75-34-3 1,1-Dichloroethane 3.5 ug/l 6 5 2/18/2010
MW-3AS 75-34-3 1,1-Dichloroethane 3.4 ug/l 6 5 8/25/2010
MW-3AS 75-34-3 1,1-Dichloroethane 4.3 ug/l 6 5 2/22/2011
MW-3AS 75-34-3 1,1-Dichloroethane 6.4 ug/l 6 5 8/25/2011
MW-3AS 75-34-3 1,1-Dichloroethane 6.1 ug/l 6 5 2/22/2012
MW-3AS 75-34-3 1,1-Dichloroethane 2 ug/l 6 5 8/30/2012
MW-3AS 75-34-3 1,1-Dichloroethane 5.2 ug/l 6 5 2/20/2013
MW-3AS 75-34-3 1,1-Dichloroethane 6.3 ug/l 6 5 8/29/2013
MW-3AS 75-34-3 1,1-Dichloroethane 2 ug/l 6 5 2/25/2014
MW-3AS 75-34-3 1,1-Dichloroethane 2.1 ug/l 6 5 8/6/2014
MW-3AS 75-34-3 1,1-Dichloroethane 1.4 ug/l 6 5 2/11/2015
MW-3AS 75-34-3 1,1-Dichloroethane 11 ug/l 6 5 8/26/2015
MW-3AS 75-34-3 1,1-Dichloroethane 1 ug/l 6 5 2/9/2016
MW-3AS 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 8/25/2011
MW-3AS 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 8/26/2015
MW-3AS 78-87-5 1,2-Dichloropropane 0.8 ug/l 0.6 1 8/19/2009
MW-3AS 78-87-5 1,2-Dichloropropane 0.7 ug/l 0.6 1 2/18/2010
MW-3AS 78-87-5 1,2-Dichloropropane 0.5 ug/l 0.6 1 8/25/2010
MW-3AS 78-87-5 1,2-Dichloropropane 0.6 ug/l 0.6 1 2/22/2011
MW-3AS 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 8/25/2011
MW-3AS 78-87-5 1,2-Dichloropropane 0.6 ug/l 0.6 1 8/30/2012
MW-3AS 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 2/20/2013
MW-3AS 78-87-5 1,2-Dichloropropane 0.5 ug/l 0.6 1 2/25/2014
MW-3AS 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 8/6/2014
MW-3AS 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 2/11/2015
MW-3AS 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 8/26/2015
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3AS 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 2/9/2016
MW-3AS 106-46-7 1,4-Dichlorobenzene 3.2 ug/l 6 1 8/19/2009
MW-3AS 106-46-7 1,4-Dichlorobenzene 2.6 ug/l 6 1 2/18/2010
MW-3AS 106-46-7 1,4-Dichlorobenzene 1.8 ug/l 6 1 8/25/2010
MW-3AS 106-46-7 1,4-Dichlorobenzene 2.1 ug/l 6 1 2/22/2011
MW-3AS 106-46-7 1,4-Dichlorobenzene 0.5 ug/l 6 1 8/25/2011
MW-3AS 106-46-7 1,4-Dichlorobenzene 0.6 ug/l 6 1 2/22/2012
MW-3AS 106-46-7 1,4-Dichlorobenzene 2.6 ug/l 6 1 8/30/2012
MW-3AS 106-46-7 1,4-Dichlorobenzene 1.3 ug/l 6 1 2/20/2013
MW-3AS 106-46-7 1,4-Dichlorobenzene 0.5 ug/l 6 1 8/29/2013
MW-3AS 106-46-7 1,4-Dichlorobenzene 2.4 ug/l 6 1 2/25/2014
MW-3AS 106-46-7 1,4-Dichlorobenzene 1.8 ug/l 6 1 8/6/2014
MW-3AS 106-46-7 1,4-Dichlorobenzene 1.8 ug/l 6 1 2/11/2015
MW-3AS 106-46-7 1,4-Dichlorobenzene 0.6 ug/l 6 1 8/26/2015
MW-3AS 106-46-7 1,4-Dichlorobenzene 2 ug/l 6 1 2/9/2016
MW-3AS 106-46-7 1,4-Dichlorobenzene 1.3 ug/l 6 1 2/14/2017
MW-3AS 78-93-3 2-Butanone (Methyl ethyl ketone) 1.8 ug/l 4000 100 8/19/2009
MW-3AS 64-19-7 Acetic Acid 58 ug/L NE NE 2/24/2011
MW-3AS 64-19-7 Acetic Acid 100 ug/l NE NE 8/25/2011
MW-3AS 64-19-7 Acetic Acid 99 ug/l NE NE 2/11/2015
MW-3AS 64-19-7 Acetic Acid 55 ug/l NE NE 8/26/2015
MW-3AS 67-64-1 Acetone 1.5 ug/l 6000 100 8/19/2009
MW-3AS 71-43-2 Benzene 2.6 ug/l 1 1 8/19/2009
MW-3AS 71-43-2 Benzene 2.9 ug/l 1 1 2/18/2010
MW-3AS 71-43-2 Benzene 1.7 ug/l 1 1 8/25/2010
MW-3AS 71-43-2 Benzene 2.7 ug/l 1 1 2/22/2011
MW-3AS 71-43-2 Benzene 0.6 ug/l 1 1 8/25/2011
MW-3AS 71-43-2 Benzene 1.2 ug/l 1 1 2/22/2012
MW-3AS 71-43-2 Benzene 2.5 ug/l 1 1 8/30/2012
MW-3AS 71-43-2 Benzene 2 ug/l 1 1 2/20/2013
MW-3AS 71-43-2 Benzene 0.8 ug/l 1 1 8/29/2013
MW-3AS 71-43-2 Benzene 3.1 ug/l 1 1 2/25/2014
MW-3AS 71-43-2 Benzene 2.1 ug/l 1 1 8/6/2014
MW-3AS 71-43-2 Benzene 2.4 ug/l 1 1 2/11/2015
MW-3AS 71-43-2 Benzene 0.8 ug/l 1 1 8/26/2015
MW-3AS 71-43-2 Benzene 2.6 ug/l 1 1 2/9/2016
MW-3AS 71-43-2 Benzene 1.1 ug/l 1 1 2/14/2017
MW-3AS 107-92-6 Butyric Acid 100 ug/L NE NE 2/24/2011
MW-3AS 107-92-6 Butyric Acid 18 ug/l NE NE 8/26/2015
MW-3AS 124-38-9 Carbon Dioxide 168 mg/l NE NE 8/19/2009
MW-3AS 124-38-9 Carbon Dioxide 768 mg/l NE NE 2/18/2010
MW-3AS 124-38-9 Carbon Dioxide 427000 ug/l NE 1000 8/25/2010
MW-3AS 124-38-9 Carbon Dioxide 561000 ug/l NE 1000 2/22/2011
MW-3AS 124-38-9 Carbon Dioxide 215000 ug/l NE 1000 8/25/2011
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3AS 124-38-9 Carbon Dioxide 458000 ug/l NE 1000 2/22/2012
MW-3AS 124-38-9 Carbon Dioxide 599000 ug/l NE 1000 8/30/2012
MW-3AS 124-38-9 Carbon Dioxide 535000 ug/l NE 1000 2/11/2015
MW-3AS 124-38-9 Carbon Dioxide 175000 ug/l NE 1000 8/26/2015
MW-3AS 16887-00-6 Chloride 14 mg/l 250 5 8/19/2009
MW-3AS 16887-00-6 Chloride 19 mg/l 250 5 2/18/2010
MW-3AS 16887-00-6 Chloride 8000 ug/l 250000 5000 8/25/2010
MW-3AS 16887-00-6 Chloride 12000 ug/l 250000 5000 2/22/2011
MW-3AS 16887-00-6 Chloride 7000 ug/l 250000 5000 8/25/2011
MW-3AS 16887-00-6 Chloride 7000 ug/l 250000 5000 2/22/2012
MW-3AS 16887-00-6 Chloride 17000 ug/l 250000 5000 8/30/2012
MW-3AS 16887-00-6 Chloride 12000 ug/l 250000 5000 2/20/2013
MW-3AS 16887-00-6 Chloride 11000 ug/l 250000 5000 8/29/2013
MW-3AS 16887-00-6 Chloride 18000 ug/l 250000 5000 2/25/2014
MW-3AS 16887-00-6 Chloride 10000 ug/l 250000 5000 8/6/2014
MW-3AS 16887-00-6 Chloride 10000 ug/l 250000 5000 2/11/2015
MW-3AS 16887-00-6 Chloride 29000 ug/l 250000 5000 2/9/2016
MW-3AS 16887-00-6 Chloride 15000 ug/l 250000 5000 2/14/2017
MW-3AS 108-90-7 Chlorobenzene 5.9 ug/l 50 3 8/19/2009
MW-3AS 108-90-7 Chlorobenzene 7.6 ug/l 50 3 2/18/2010
MW-3AS 108-90-7 Chlorobenzene 3.8 ug/l 50 3 8/25/2010
MW-3AS 108-90-7 Chlorobenzene 5.3 ug/l 50 3 2/22/2011
MW-3AS 108-90-7 Chlorobenzene 0.6 ug/l 50 3 8/25/2011
MW-3AS 108-90-7 Chlorobenzene 1.9 ug/l 50 3 2/22/2012
MW-3AS 108-90-7 Chlorobenzene 6.3 ug/l 50 3 8/30/2012
MW-3AS 108-90-7 Chlorobenzene 4.3 ug/l 50 3 2/20/2013
MW-3AS 108-90-7 Chlorobenzene 1.1 ug/l 50 3 8/29/2013
MW-3AS 108-90-7 Chlorobenzene 6.2 ug/l 50 3 2/25/2014
MW-3AS 108-90-7 Chlorobenzene 4.5 ug/l 50 3 8/6/2014
MW-3AS 108-90-7 Chlorobenzene 4.5 ug/l 50 3 2/11/2015
MW-3AS 108-90-7 Chlorobenzene 0.7 ug/l 50 3 8/26/2015
MW-3AS 108-90-7 Chlorobenzene 3.9 ug/l 50 3 2/9/2016
MW-3AS 108-90-7 Chlorobenzene 2.6 ug/l 50 3 2/14/2017
MW-3AS 75-00-3 Chloroethane 1.4 ug/l 3000 10 2/18/2010
MW-3AS 75-00-3 Chloroethane 1.2 ug/l 3000 10 8/25/2010
MW-3AS 75-00-3 Chloroethane 1.3 ug/l 3000 10 2/22/2011
MW-3AS 75-00-3 Chloroethane 0.6 ug/l 3000 10 8/25/2011
MW-3AS 75-00-3 Chloroethane 1.1 ug/l 3000 10 2/22/2012
MW-3AS 75-00-3 Chloroethane 1 ug/l 3000 10 8/30/2012
MW-3AS 75-00-3 Chloroethane 0.7 ug/l 3000 10 8/29/2013
MW-3AS 75-00-3 Chloroethane 1 ug/l 3000 10 2/25/2014
MW-3AS 75-00-3 Chloroethane 0.7 ug/l 3000 10 2/11/2015
MW-3AS 75-00-3 Chloroethane 0.9 ug/l 3000 10 8/26/2015
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 0.9 ug/l 70 5 8/19/2009
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 0.9 ug/l 70 5 2/18/2010
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 2.6 ug/l 70 5 8/25/2010
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 2.4 ug/l 70 5 2/22/2011
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 9.3 ug/l 70 5 8/25/2011
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 3.3 ug/l 70 5 2/22/2012
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 4.6 ug/l 70 5 2/20/2013
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 5 ug/l 70 5 8/29/2013
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 0.9 ug/l 70 5 8/6/2014
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 0.6 ug/l 70 5 2/11/2015
MW-3AS 156-59-2 Cis-1,2-Dichloroethene 8.3 ug/l 70 5 8/26/2015
MW-3AS 75-71-8 Dichlorodifluoromethane 0.2 ug/l 1000 5 8/19/2009
MW-3AS 74-84-0 Ethane 1.05 ug/L NE NE 2/24/2011
MW-3AS 74-84-0 Ethane 0.27 ug/l NE NE 8/25/2011
MW-3AS 74-84-0 Ethane 0.51 ug/l NE NE 2/22/2012
MW-3AS 74-84-0 Ethane 1.1 ug/l NE NE 8/30/2012
MW-3AS 74-84-0 Ethane 0.25 ug/l NE NE 2/11/2015
MW-3AS 74-84-0 Ethane 0.58 ug/l NE NE 8/26/2015
MW-3AS 74-85-1 Ethene 0.14 ug/l NE NE 8/25/2011
MW-3AS 74-85-1 Ethene 0.22 ug/l NE NE 2/22/2012
MW-3AS 74-85-1 Ethene 0.21 ug/l NE NE 8/26/2015
MW-3AS 1333-74-0 Hydrogen 1.3 nM NE NE 2/24/2011
MW-3AS 1333-74-0 Hydrogen 4.2 nM NE NE 8/25/2011
MW-3AS 1333-74-0 Hydrogen 0.63 nM NE NE 2/22/2012
MW-3AS 1333-74-0 Hydrogen 4.7 nM NE NE 8/30/2012
MW-3AS 1333-74-0 Hydrogen 1.2 nM NE NE 2/11/2015
MW-3AS 1333-74-0 Hydrogen 4.1 nM NE NE 8/26/2015
MW-3AS 50-21-5 Lactic Acid 280 ug/l NE NE 8/25/2011
MW-3AS 50-21-5 Lactic Acid 230 ug/l NE NE 8/30/2012
MW-3AS 50-21-5 Lactic Acid 300 ug/l NE NE 2/11/2015
MW-3AS 50-21-5 Lactic Acid 22 ug/l NE NE 8/26/2015
MW-3AS 7439-97-6 Mercury 0.05 ug/l 1 0.2 8/19/2009
MW-3AS 7439-97-6 Mercury 0.08 ug/l 1 0.2 8/30/2012
MW-3AS 7439-97-6 Mercury 0.07 ug/l 1 0.2 2/11/2015
MW-3AS 74-82-8 Methane 9000 ug/L NE NE 2/24/2011
MW-3AS 74-82-8 Methane 1400 ug/l NE NE 8/25/2011
MW-3AS 74-82-8 Methane 3000 ug/l NE NE 2/22/2012
MW-3AS 74-82-8 Methane 8700 ug/l NE NE 8/30/2012
MW-3AS 74-82-8 Methane 11000 ug/l NE NE 2/11/2015
MW-3AS 74-82-8 Methane 1500 ug/l NE NE 8/26/2015
MW-3AS 79-09-4 Propionic Acid 74 ug/l NE NE 8/25/2011
MW-3AS 127-18-4 Tetrachloroethene 0.3 ug/l 0.7 1 8/26/2015
MW-3AS 108-88-3 Toluene 0.5 ug/l 600 1 8/19/2009
MW-3AS 108-88-3 Toluene 0.3 ug/l 600 1 2/18/2010
MW-3AS 79-01-6 Trichloroethene 0.6 ug/l 3 1 8/25/2010
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3AS 79-01-6 Trichloroethene 1.9 ug/l 3 1 8/25/2011
MW-3AS 79-01-6 Trichloroethene 0.6 ug/l 3 1 2/22/2012
MW-3AS 79-01-6 Trichloroethene 0.7 ug/l 3 1 8/29/2013
MW-3AS 79-01-6 Trichloroethene 1.6 ug/l 3 1 8/26/2015
MW-3AS 75-01-4 Vinyl Chloride 1 ug/l 0.03 1 8/19/2009
MW-3AS 75-01-4 Vinyl Chloride 2.1 ug/l 0.03 1 2/18/2010
MW-3AS 75-01-4 Vinyl Chloride 1.6 ug/l 0.03 1 8/25/2010
MW-3AS 75-01-4 Vinyl Chloride 1.3 ug/l 0.03 1 2/22/2011
MW-3AS 75-01-4 Vinyl Chloride 2.1 ug/l 0.03 1 8/25/2011
MW-3AS 75-01-4 Vinyl Chloride 4.9 ug/l 0.03 1 2/22/2012
MW-3AS 75-01-4 Vinyl Chloride 2.8 ug/l 0.03 1 2/20/2013
MW-3AS 75-01-4 Vinyl Chloride 2.2 ug/l 0.03 1 8/29/2013
MW-3AS 75-01-4 Vinyl Chloride 0.7 ug/l 0.03 1 8/6/2014
MW-3AS 75-01-4 Vinyl Chloride 4 ug/l 0.03 1 8/26/2015
MW-3AS 75-01-4 Vinyl Chloride 0.8 ug/l 0.03 1 2/9/2016
MW-3D 75-34-3 1,1-Dichloroethane 19.8 ug/l 6 5 10/7/1999
MW-3D 75-34-3 1,1-Dichloroethane 4.3 ug/l 6 5 2/7/2002
MW-3D 75-34-3 1,1-Dichloroethane 4.3 ug/l 6 5 8/9/2007
MW-3D 75-34-3 1,1-Dichloroethane 5 ug/l 6 5 2/19/2008
MW-3D 75-34-3 1,1-Dichloroethane 6.9 ug/l 6 5 8/19/2008
MW-3D 75-34-3 1,1-Dichloroethane 6.7 ug/l 6 5 2/17/2009
MW-3D 75-34-3 1,1-Dichloroethane 6.5 ug/l 6 5 2/18/2010
MW-3D 75-34-3 1,1-Dichloroethane 7.5 ug/l 6 5 8/25/2010
MW-3D 75-34-3 1,1-Dichloroethane 9 ug/l 6 5 2/22/2011
MW-3D 75-34-3 1,1-Dichloroethane 7.6 ug/l 6 5 8/25/2011
MW-3D 75-34-3 1,1-Dichloroethane 5.8 ug/l 6 5 2/22/2012
MW-3D 75-34-3 1,1-Dichloroethane 8.5 ug/l 6 5 8/30/2012
MW-3D 75-34-3 1,1-Dichloroethane 10.5 ug/l 6 5 2/20/2013
MW-3D 75-34-3 1,1-Dichloroethane 7.5 ug/l 6 5 8/29/2013
MW-3D 75-34-3 1,1-Dichloroethane 9.2 ug/l 6 5 2/25/2014
MW-3D 75-34-3 1,1-Dichloroethane 9.4 ug/l 6 5 8/6/2014
MW-3D 75-34-3 1,1-Dichloroethane 7.7 ug/l 6 5 2/11/2015
MW-3D 75-34-3 1,1-Dichloroethane 9.7 ug/l 6 5 8/26/2015
MW-3D 75-34-3 1,1-Dichloroethane 9.3 ug/l 6 5 2/9/2016
MW-3D 75-34-3 1,1-Dichloroethane 5.4 ug/l 6 5 2/14/2017
MW-3D 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 2/7/2002
MW-3D 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 8/9/2007
MW-3D 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/19/2008
MW-3D 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 8/19/2008
MW-3D 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/17/2009
MW-3D 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/18/2010
MW-3D 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 8/25/2010
MW-3D 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/22/2011
MW-3D 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/25/2011
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3D 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 2/22/2012
MW-3D 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 8/30/2012
MW-3D 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 2/20/2013
MW-3D 75-35-4 1,1-Dichloroethene 0.2 ug/l 7 5 8/29/2013
MW-3D 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 2/25/2014
MW-3D 75-35-4 1,1-Dichloroethene 0.3 ug/l 7 5 8/6/2014
MW-3D 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 8/26/2015
MW-3D 75-35-4 1,1-Dichloroethene 0.4 ug/l 7 5 2/9/2016
MW-3D 78-87-5 1,2-Dichloropropane 2.1 ug/l 0.6 1 2/19/2008
MW-3D 78-87-5 1,2-Dichloropropane 0.3 ug/l 0.6 1 2/20/2013
MW-3D 78-87-5 1,2-Dichloropropane 0.5 ug/l 0.6 1 8/6/2014
MW-3D 78-87-5 1,2-Dichloropropane 0.4 ug/l 0.6 1 2/11/2015
MW-3D 78-87-5 1,2-Dichloropropane 0.5 ug/l 0.6 1 8/26/2015
MW-3D 78-87-5 1,2-Dichloropropane 0.5 ug/l 0.6 1 2/14/2017
MW-3D 106-46-7 1,4-Dichlorobenzene 0.4 ug/l 6 1 2/20/2013
MW-3D 106-46-7 1,4-Dichlorobenzene 0.4 ug/l 6 1 8/29/2013
MW-3D 106-46-7 1,4-Dichlorobenzene 0.5 ug/l 6 1 2/25/2014
MW-3D 106-46-7 1,4-Dichlorobenzene 0.6 ug/l 6 1 8/6/2014
MW-3D 106-46-7 1,4-Dichlorobenzene 0.5 ug/l 6 1 2/11/2015
MW-3D 106-46-7 1,4-Dichlorobenzene 0.7 ug/l 6 1 8/26/2015
MW-3D 106-46-7 1,4-Dichlorobenzene 0.8 ug/l 6 1 2/9/2016
MW-3D 106-46-7 1,4-Dichlorobenzene 0.5 ug/l 6 1 2/14/2017
MW-3D 94-75-7 2,4-D 0.46 ug/l 70 2 8/30/2012
MW-3D 78-93-3 2-Butanone (Methyl ethyl ketone) 1 ug/l 4000 100 2/7/2002
MW-3D 78-93-3 2-Butanone (Methyl ethyl ketone) 1 ug/l 4000 100 8/9/2007
MW-3D 78-93-3 2-Butanone (Methyl ethyl ketone) 2.7 ug/l 4000 100 8/19/2008
MW-3D 64-19-7 Acetic Acid 40 ug/L NE NE 2/24/2011
MW-3D 64-19-7 Acetic Acid 380 ug/l NE NE 8/30/2012
MW-3D 64-19-7 Acetic Acid 69 ug/l NE NE 2/11/2015
MW-3D 64-19-7 Acetic Acid 36 ug/l NE NE 8/26/2015
MW-3D 67-64-1 Acetone 2.2 ug/l 6000 100 2/19/2008
MW-3D 67-64-1 Acetone 3.9 ug/l 6000 100 8/19/2008
MW-3D 319-84-6 Alpha-BHC 0.042 ug/l 0.006 0.05 2/19/2008
MW-3D 71-43-2 Benzene 0.2 ug/l 1 1 2/7/2002
MW-3D 71-43-2 Benzene 0.2 ug/l 1 1 8/9/2007
MW-3D 71-43-2 Benzene 0.2 ug/l 1 1 2/19/2008
MW-3D 71-43-2 Benzene 0.3 ug/l 1 1 8/19/2008
MW-3D 71-43-2 Benzene 0.3 ug/l 1 1 2/17/2009
MW-3D 71-43-2 Benzene 0.3 ug/l 1 1 2/18/2010
MW-3D 71-43-2 Benzene 0.4 ug/l 1 1 8/25/2010
MW-3D 71-43-2 Benzene 0.4 ug/l 1 1 2/22/2011
MW-3D 71-43-2 Benzene 0.4 ug/l 1 1 8/25/2011
MW-3D 71-43-2 Benzene 0.5 ug/l 1 1 8/30/2012
MW-3D 71-43-2 Benzene 0.5 ug/l 1 1 2/20/2013
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3D 71-43-2 Benzene 0.4 ug/l 1 1 8/29/2013
MW-3D 71-43-2 Benzene 0.6 ug/l 1 1 2/25/2014
MW-3D 71-43-2 Benzene 0.6 ug/l 1 1 8/6/2014
MW-3D 71-43-2 Benzene 0.6 ug/l 1 1 2/11/2015
MW-3D 71-43-2 Benzene 0.8 ug/l 1 1 8/26/2015
MW-3D 71-43-2 Benzene 0.8 ug/l 1 1 2/9/2016
MW-3D 71-43-2 Benzene 0.6 ug/l 1 1 2/14/2017
MW-3D 117-81-7 Bis-(2-Ethylhexyl) Phthalate 32 ug/l 3 15 8/12/2004
MW-3D 117-81-7 Bis-(2-Ethylhexyl) Phthalate 11.3 ug/l 3 15 2/18/2010
MW-3D 117-81-7 Bis-(2-Ethylhexyl) Phthalate 11.7 ug/l 3 15 8/29/2013
MW-3D 107-92-6 Butyric Acid 100 ug/L NE NE 2/24/2011
MW-3D 107-92-6 Butyric Acid 240 ug/l NE NE 2/22/2012
MW-3D 107-92-6 Butyric Acid 17 ug/l NE NE 8/26/2015
MW-3D 124-38-9 Carbon Dioxide 123 mg/l NE NE 2/18/2010
MW-3D 124-38-9 Carbon Dioxide 84000 ug/l NE 1000 8/25/2010
MW-3D 124-38-9 Carbon Dioxide 65000 ug/l NE 1000 2/22/2011
MW-3D 124-38-9 Carbon Dioxide 21000 ug/l NE 1000 8/25/2011
MW-3D 124-38-9 Carbon Dioxide 15000 ug/l NE 1000 2/22/2012
MW-3D 124-38-9 Carbon Dioxide 88000 ug/l NE 1000 8/30/2012
MW-3D 124-38-9 Carbon Dioxide 61000 ug/l NE 1000 2/11/2015
MW-3D 124-38-9 Carbon Dioxide 87000 ug/l NE 1000 8/26/2015
MW-3D 16887-00-6 Chloride 9 mg/l 250 5 2/18/2010
MW-3D 16887-00-6 Chloride 8000 ug/l 250000 5000 8/25/2010
MW-3D 16887-00-6 Chloride 9000 ug/l 250000 5000 2/22/2011
MW-3D 16887-00-6 Chloride 7000 ug/l 250000 5000 8/25/2011
MW-3D 16887-00-6 Chloride 9000 ug/l 250000 5000 2/22/2012
MW-3D 16887-00-6 Chloride 12000 ug/l 250000 5000 8/30/2012
MW-3D 16887-00-6 Chloride 9000 ug/l 250000 5000 2/20/2013
MW-3D 16887-00-6 Chloride 10000 ug/l 250000 5000 8/29/2013
MW-3D 16887-00-6 Chloride 10000 ug/l 250000 5000 2/25/2014
MW-3D 16887-00-6 Chloride 9000 ug/l 250000 5000 8/6/2014
MW-3D 16887-00-6 Chloride 8000 ug/l 250000 5000 2/11/2015
MW-3D 16887-00-6 Chloride 7000 ug/l 250000 5000 8/26/2015
MW-3D 16887-00-6 Chloride 13000 ug/l 250000 5000 2/9/2016
MW-3D 16887-00-6 Chloride 10000 ug/l 250000 5000 2/14/2017
MW-3D 108-90-7 Chlorobenzene 7 ug/l 50 3 10/7/1999
MW-3D 108-90-7 Chlorobenzene 0.3 ug/l 50 3 8/30/2012
MW-3D 108-90-7 Chlorobenzene 0.4 ug/l 50 3 2/20/2013
MW-3D 108-90-7 Chlorobenzene 0.4 ug/l 50 3 8/29/2013
MW-3D 108-90-7 Chlorobenzene 0.5 ug/l 50 3 2/25/2014
MW-3D 108-90-7 Chlorobenzene 0.5 ug/l 50 3 8/6/2014
MW-3D 108-90-7 Chlorobenzene 0.5 ug/l 50 3 2/11/2015
MW-3D 108-90-7 Chlorobenzene 0.7 ug/l 50 3 8/26/2015
MW-3D 108-90-7 Chlorobenzene 0.8 ug/l 50 3 2/9/2016
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3D 108-90-7 Chlorobenzene 0.6 ug/l 50 3 2/14/2017
MW-3D 74-87-3 Chloromethane 0.2 ug/l 3 1 8/19/2008
MW-3D 156-59-2 Cis-1,2-Dichloroethene 1.2 ug/l 70 5 2/7/2002
MW-3D 156-59-2 Cis-1,2-Dichloroethene 1.2 ug/l 70 5 8/9/2007
MW-3D 156-59-2 Cis-1,2-Dichloroethene 1.3 ug/l 70 5 2/19/2008
MW-3D 156-59-2 Cis-1,2-Dichloroethene 2.2 ug/l 70 5 8/19/2008
MW-3D 156-59-2 Cis-1,2-Dichloroethene 2.7 ug/l 70 5 2/17/2009
MW-3D 156-59-2 Cis-1,2-Dichloroethene 4 ug/l 70 5 2/18/2010
MW-3D 156-59-2 Cis-1,2-Dichloroethene 4.8 ug/l 70 5 8/25/2010
MW-3D 156-59-2 Cis-1,2-Dichloroethene 6.4 ug/l 70 5 2/22/2011
MW-3D 156-59-2 Cis-1,2-Dichloroethene 6 ug/l 70 5 8/25/2011
MW-3D 156-59-2 Cis-1,2-Dichloroethene 3 ug/l 70 5 2/22/2012
MW-3D 156-59-2 Cis-1,2-Dichloroethene 7.3 ug/l 70 5 8/30/2012
MW-3D 156-59-2 Cis-1,2-Dichloroethene 9.6 ug/l 70 5 2/20/2013
MW-3D 156-59-2 Cis-1,2-Dichloroethene 8.5 ug/l 70 5 8/29/2013
MW-3D 156-59-2 Cis-1,2-Dichloroethene 10.2 ug/l 70 5 2/25/2014
MW-3D 156-59-2 Cis-1,2-Dichloroethene 11.9 ug/l 70 5 8/6/2014
MW-3D 156-59-2 Cis-1,2-Dichloroethene 8.6 ug/l 70 5 2/11/2015
MW-3D 156-59-2 Cis-1,2-Dichloroethene 14.6 ug/l 70 5 8/26/2015
MW-3D 156-59-2 Cis-1,2-Dichloroethene 15.6 ug/l 70 5 2/9/2016
MW-3D 156-59-2 Cis-1,2-Dichloroethene 8.3 ug/l 70 5 2/14/2017
MW-3D 319-86-8 Delta-BHC 0.067 ug/l 0.019 0.05 8/12/2004
MW-3D 75-71-8 Dichlorodifluoromethane 5.5 ug/l 1000 5 2/2/2000
MW-3D 75-71-8 Dichlorodifluoromethane 7.1 ug/l 1000 5 8/10/2000
MW-3D 75-71-8 Dichlorodifluoromethane 1.8 ug/l 1000 5 2/7/2002
MW-3D 75-71-8 Dichlorodifluoromethane 1.8 ug/l 1000 5 8/9/2007
MW-3D 75-71-8 Dichlorodifluoromethane 2.2 ug/l 1000 5 2/19/2008
MW-3D 75-71-8 Dichlorodifluoromethane 1.7 ug/l 1000 5 8/19/2008
MW-3D 75-71-8 Dichlorodifluoromethane 1.3 ug/l 1000 5 2/17/2009
MW-3D 75-71-8 Dichlorodifluoromethane 1.3 ug/l 1000 5 2/18/2010
MW-3D 75-71-8 Dichlorodifluoromethane 1.1 ug/l 1000 5 8/25/2010
MW-3D 75-71-8 Dichlorodifluoromethane 1.3 ug/l 1000 5 2/22/2011
MW-3D 75-71-8 Dichlorodifluoromethane 1.1 ug/l 1000 5 8/25/2011
MW-3D 75-71-8 Dichlorodifluoromethane 0.6 ug/l 1000 5 2/22/2012
MW-3D 75-71-8 Dichlorodifluoromethane 1 ug/l 1000 5 8/30/2012
MW-3D 75-71-8 Dichlorodifluoromethane 2.2 ug/l 1000 5 2/20/2013
MW-3D 75-71-8 Dichlorodifluoromethane 0.8 ug/l 1000 5 8/29/2013
MW-3D 75-71-8 Dichlorodifluoromethane 0.6 ug/l 1000 5 2/25/2014
MW-3D 75-71-8 Dichlorodifluoromethane 0.9 ug/l 1000 5 8/26/2015
MW-3D 75-71-8 Dichlorodifluoromethane 0.7 ug/l 1000 5 2/9/2016
MW-3D 88-85-7 Dinoseb 2.6 ug/l 7 1 10/7/1999
MW-3D 74-84-0 Ethane 0.016 ug/l NE NE 8/26/2015
MW-3D 74-85-1 Ethene 0.03 ug/l NE NE 8/25/2011
MW-3D 74-85-1 Ethene 0.069 ug/l NE NE 2/22/2012
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3D 74-85-1 Ethene 0.017 ug/l NE NE 2/11/2015
MW-3D 58-89-9 Gamma-BHC (Lindane) 0.033 ug/l 0.03 0.05 2/19/2008
MW-3D 1333-74-0 Hydrogen 0.79 nM NE NE 2/24/2011
MW-3D 1333-74-0 Hydrogen 5.5 nM NE NE 8/25/2011
MW-3D 1333-74-0 Hydrogen 0.9 nM NE NE 2/22/2012
MW-3D 1333-74-0 Hydrogen 2.2 nM NE NE 8/30/2012
MW-3D 1333-74-0 Hydrogen 1.2 nM NE NE 2/23/2015
MW-3D 1333-74-0 Hydrogen 2.6 nM NE NE 8/26/2015
MW-3D 50-21-5 Lactic Acid 230 ug/L NE NE 2/24/2011
MW-3D 50-21-5 Lactic Acid 220 ug/l NE NE 8/25/2011
MW-3D 50-21-5 Lactic Acid 120 ug/l NE NE 2/22/2012
MW-3D 50-21-5 Lactic Acid 230 ug/l NE NE 2/11/2015
MW-3D 50-21-5 Lactic Acid 14 ug/l NE NE 8/26/2015
MW-3D 7439-97-6 Mercury 0.00015 mg/l 1 0.2 2/7/2002
MW-3D 7439-97-6 Mercury 0.00015 mg/l 1 0.2 8/9/2007
MW-3D 7439-97-6 Mercury 0.00014 mg/l 1 0.2 2/19/2008
MW-3D 7439-97-6 Mercury 0.00018 mg/l 1 0.2 8/19/2008
MW-3D 7439-97-6 Mercury 0.13 ug/l 1 0.2 2/17/2009
MW-3D 7439-97-6 Mercury 0.11 ug/l 1 0.2 2/18/2010
MW-3D 7439-97-6 Mercury 0.1 ug/l 1 0.2 2/22/2011
MW-3D 7439-97-6 Mercury 0.16 ug/l 1 0.2 8/30/2012
MW-3D 7439-97-6 Mercury 0.05 ug/l 1 0.2 2/20/2013
MW-3D 74-82-8 Methane 3300 ug/L NE NE 2/24/2011
MW-3D 74-82-8 Methane 3000 ug/l NE NE 8/25/2011
MW-3D 74-82-8 Methane 2500 ug/l NE NE 2/22/2012
MW-3D 74-82-8 Methane 3900 ug/l NE NE 8/30/2012
MW-3D 74-82-8 Methane 1600 ug/l NE NE 2/11/2015
MW-3D 74-82-8 Methane 2100 ug/l NE NE 8/26/2015
MW-3D 75-09-2 Methylene Chloride 0.7 ug/l 5 1 2/7/2002
MW-3D 75-09-2 Methylene Chloride 0.7 ug/l 5 1 8/9/2007
MW-3D 75-09-2 Methylene Chloride 0.6 ug/l 5 1 8/19/2008
MW-3D 75-09-2 Methylene Chloride 0.3 ug/l 5 1 2/17/2009
MW-3D 91-20-3 Naphthalene 17 ug/l 6 10 8/10/2000
MW-3D 79-09-4 Propionic Acid 54 ug/l NE NE 8/25/2011
MW-3D 127-18-4 Tetrachloroethene 1.9 ug/l 0.7 1 2/7/2002
MW-3D 127-18-4 Tetrachloroethene 1.9 ug/l 0.7 1 8/9/2007
MW-3D 127-18-4 Tetrachloroethene 2.3 ug/l 0.7 1 2/19/2008
MW-3D 127-18-4 Tetrachloroethene 2.5 ug/l 0.7 1 8/19/2008
MW-3D 127-18-4 Tetrachloroethene 2.2 ug/l 0.7 1 2/17/2009
MW-3D 127-18-4 Tetrachloroethene 1.9 ug/l 0.7 1 2/18/2010
MW-3D 127-18-4 Tetrachloroethene 1.5 ug/l 0.7 1 8/25/2010
MW-3D 127-18-4 Tetrachloroethene 1.5 ug/l 0.7 1 2/22/2011
MW-3D 127-18-4 Tetrachloroethene 1.2 ug/l 0.7 1 8/25/2011
MW-3D 127-18-4 Tetrachloroethene 0.9 ug/l 0.7 1 2/22/2012
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-3D 127-18-4 Tetrachloroethene 1.4 ug/l 0.7 1 8/30/2012
MW-3D 127-18-4 Tetrachloroethene 1.2 ug/l 0.7 1 2/20/2013
MW-3D 127-18-4 Tetrachloroethene 1.4 ug/l 0.7 1 8/29/2013
MW-3D 127-18-4 Tetrachloroethene 1.2 ug/l 0.7 1 2/25/2014
MW-3D 127-18-4 Tetrachloroethene 1.1 ug/l 0.7 1 8/6/2014
MW-3D 127-18-4 Tetrachloroethene 1.1 ug/l 0.7 1 2/11/2015
MW-3D 127-18-4 Tetrachloroethene 0.9 ug/l 0.7 1 8/26/2015
MW-3D 127-18-4 Tetrachloroethene 0.9 ug/l 0.7 1 2/9/2016
MW-3D 127-18-4 Tetrachloroethene 0.4 ug/l 0.7 1 2/14/2017
MW-3D 108-88-3 Toluene 0.6 ug/l 600 1 2/7/2002
MW-3D 108-88-3 Toluene 0.6 ug/l 600 1 8/9/2007
MW-3D 108-88-3 Toluene 0.3 ug/l 600 1 2/19/2008
MW-3D 79-01-6 Trichloroethene 5.4 ug/l 3 1 10/7/1999
MW-3D 79-01-6 Trichloroethene 1.9 ug/l 3 1 2/7/2002
MW-3D 79-01-6 Trichloroethene 1.9 ug/l 3 1 8/9/2007
MW-3D 79-01-6 Trichloroethene 2.1 ug/l 3 1 8/19/2008
MW-3D 79-01-6 Trichloroethene 1.7 ug/l 3 1 2/17/2009
MW-3D 79-01-6 Trichloroethene 1.3 ug/l 3 1 2/18/2010
MW-3D 79-01-6 Trichloroethene 1.2 ug/l 3 1 8/25/2010
MW-3D 79-01-6 Trichloroethene 1.3 ug/l 3 1 2/22/2011
MW-3D 79-01-6 Trichloroethene 1.2 ug/l 3 1 8/25/2011
MW-3D 79-01-6 Trichloroethene 0.8 ug/l 3 1 2/22/2012
MW-3D 79-01-6 Trichloroethene 1.4 ug/l 3 1 8/30/2012
MW-3D 79-01-6 Trichloroethene 1.5 ug/l 3 1 2/20/2013
MW-3D 79-01-6 Trichloroethene 1.3 ug/l 3 1 8/29/2013
MW-3D 79-01-6 Trichloroethene 1.7 ug/l 3 1 2/25/2014
MW-3D 79-01-6 Trichloroethene 1.6 ug/l 3 1 8/6/2014
MW-3D 79-01-6 Trichloroethene 1.7 ug/l 3 1 2/11/2015
MW-3D 79-01-6 Trichloroethene 2.3 ug/l 3 1 8/26/2015
MW-3D 79-01-6 Trichloroethene 2.7 ug/l 3 1 2/9/2016
MW-3D 79-01-6 Trichloroethene 1.2 ug/l 3 1 2/14/2017
MW-3D 75-01-4 Vinyl Chloride 1.2 ug/l 0.03 1 8/6/2014
MW-6D 75-34-3 1,1-Dichloroethane 1 ug/l 6 5 2/7/2002
MW-6D 75-34-3 1,1-Dichloroethane 1 ug/l 6 5 8/9/2007
MW-6D 75-34-3 1,1-Dichloroethane 0.4 ug/l 6 5 2/19/2008
MW-6D 75-34-3 1,1-Dichloroethane 0.5 ug/l 6 5 8/19/2008
MW-6D 75-34-3 1,1-Dichloroethane 0.3 ug/l 6 5 8/19/2009
MW-6D 75-34-3 1,1-Dichloroethane 0.5 ug/l 6 5 2/18/2010
MW-6D 75-34-3 1,1-Dichloroethane 0.3 ug/l 6 5 8/25/2010
MW-6D 75-34-3 1,1-Dichloroethane 0.4 ug/l 6 5 2/22/2011
MW-6D 75-34-3 1,1-Dichloroethane 0.6 ug/l 6 5 2/20/2013
MW-6D 75-34-3 1,1-Dichloroethane 0.3 ug/l 6 5 8/29/2013
MW-6D 75-34-3 1,1-Dichloroethane 0.4 ug/l 6 5 2/25/2014
MW-6D 75-34-3 1,1-Dichloroethane 0.5 ug/l 6 5 8/6/2014
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-6D 95-50-1 1,2-Dichlorobenzene 0.3 ug/l 20 5 2/7/2002
MW-6D 95-50-1 1,2-Dichlorobenzene 0.3 ug/l 20 5 8/9/2007
MW-6D 95-50-1 1,2-Dichlorobenzene 0.2 ug/l 20 5 2/19/2008
MW-6D 95-50-1 1,2-Dichlorobenzene 0.3 ug/l 20 5 8/19/2008
MW-6D 95-50-1 1,2-Dichlorobenzene 0.2 ug/l 20 5 8/19/2009
MW-6D 107-06-2 1,2-Dichloroethane 0.2 ug/l 20 1 2/7/2002
MW-6D 107-06-2 1,2-Dichloroethane 0.2 ug/l 20 1 8/9/2007
MW-6D 106-46-7 1,4-Dichlorobenzene 1.9 ug/l 6 1 2/7/2002
MW-6D 106-46-7 1,4-Dichlorobenzene 1.9 ug/l 6 1 8/9/2007
MW-6D 106-46-7 1,4-Dichlorobenzene 1.8 ug/l 6 1 2/19/2008
MW-6D 106-46-7 1,4-Dichlorobenzene 2.4 ug/l 6 1 8/19/2008
MW-6D 106-46-7 1,4-Dichlorobenzene 2.4 ug/l 6 1 2/17/2009
MW-6D 106-46-7 1,4-Dichlorobenzene 2.2 ug/l 6 1 8/19/2009
MW-6D 106-46-7 1,4-Dichlorobenzene 1.7 ug/l 6 1 2/18/2010
MW-6D 106-46-7 1,4-Dichlorobenzene 2.5 ug/l 6 1 8/25/2010
MW-6D 106-46-7 1,4-Dichlorobenzene 2.1 ug/l 6 1 2/22/2011
MW-6D 106-46-7 1,4-Dichlorobenzene 1.7 ug/l 6 1 8/25/2011
MW-6D 106-46-7 1,4-Dichlorobenzene 1.8 ug/l 6 1 2/22/2012
MW-6D 106-46-7 1,4-Dichlorobenzene 2.9 ug/l 6 1 8/30/2012
MW-6D 106-46-7 1,4-Dichlorobenzene 2.3 ug/l 6 1 2/20/2013
MW-6D 106-46-7 1,4-Dichlorobenzene 3.1 ug/l 6 1 8/29/2013
MW-6D 106-46-7 1,4-Dichlorobenzene 2.4 ug/l 6 1 2/25/2014
MW-6D 106-46-7 1,4-Dichlorobenzene 3.7 ug/l 6 1 8/6/2014
MW-6D 106-46-7 1,4-Dichlorobenzene 1.6 ug/l 6 1 2/11/2015
MW-6D 106-46-7 1,4-Dichlorobenzene 2.6 ug/l 6 1 8/26/2015
MW-6D 106-46-7 1,4-Dichlorobenzene 1.8 ug/l 6 1 2/9/2016
MW-6D 106-46-7 1,4-Dichlorobenzene 1.2 ug/l 6 1 2/14/2017
MW-6D 94-75-7 2,4-D 2.6 ug/l 70 2 8/10/2000
MW-6D 94-75-7 2,4-D 3.1 ug/l 70 2 2/24/2004
MW-6D 78-93-3 2-Butanone (Methyl ethyl ketone) 1.8 ug/l 4000 100 2/7/2002
MW-6D 78-93-3 2-Butanone (Methyl ethyl ketone) 1.8 ug/l 4000 100 8/9/2007
MW-6D 78-93-3 2-Butanone (Methyl ethyl ketone) 3.1 ug/l 4000 100 8/19/2008
MW-6D 78-93-3 2-Butanone (Methyl ethyl ketone) 1.6 ug/l 4000 100 8/19/2009
MW-6D 72-54-8 4,4-DDD 0.055 ug/l 0.1 0.1 2/22/2012
MW-6D 64-19-7 Acetic Acid 31 ug/L NE NE 2/24/2011
MW-6D 64-19-7 Acetic Acid 58 ug/l NE NE 2/11/2015
MW-6D 64-19-7 Acetic Acid 22 ug/l NE NE 8/26/2015
MW-6D 67-64-1 Acetone 1.3 ug/l 6000 100 2/7/2002
MW-6D 67-64-1 Acetone 1.3 ug/l 6000 100 8/9/2007
MW-6D 67-64-1 Acetone 3.2 ug/l 6000 100 2/19/2008
MW-6D 67-64-1 Acetone 4.7 ug/l 6000 100 8/19/2008
MW-6D 67-64-1 Acetone 3.2 ug/l 6000 100 8/19/2009
MW-6D 319-84-6 Alpha-BHC 0.054 ug/l 0.006 0.05 2/24/2004
MW-6D 319-84-6 Alpha-BHC 0.038 ug/l 0.006 0.05 2/19/2008
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-6D 71-43-2 Benzene 2.1 ug/l 1 1 2/7/2002
MW-6D 71-43-2 Benzene 2.1 ug/l 1 1 8/9/2007
MW-6D 71-43-2 Benzene 1.7 ug/l 1 1 2/19/2008
MW-6D 71-43-2 Benzene 2.2 ug/l 1 1 8/19/2008
MW-6D 71-43-2 Benzene 1.8 ug/l 1 1 2/17/2009
MW-6D 71-43-2 Benzene 1.8 ug/l 1 1 8/19/2009
MW-6D 71-43-2 Benzene 1.8 ug/l 1 1 2/18/2010
MW-6D 71-43-2 Benzene 1.9 ug/l 1 1 8/25/2010
MW-6D 71-43-2 Benzene 1.8 ug/l 1 1 2/22/2011
MW-6D 71-43-2 Benzene 1.6 ug/l 1 1 8/25/2011
MW-6D 71-43-2 Benzene 1.1 ug/l 1 1 2/22/2012
MW-6D 71-43-2 Benzene 2.3 ug/l 1 1 8/30/2012
MW-6D 71-43-2 Benzene 2 ug/l 1 1 2/20/2013
MW-6D 71-43-2 Benzene 2 ug/l 1 1 8/29/2013
MW-6D 71-43-2 Benzene 2 ug/l 1 1 2/25/2014
MW-6D 71-43-2 Benzene 2.3 ug/l 1 1 8/6/2014
MW-6D 71-43-2 Benzene 0.5 ug/l 1 1 2/11/2015
MW-6D 71-43-2 Benzene 1.4 ug/l 1 1 8/26/2015
MW-6D 71-43-2 Benzene 1.2 ug/l 1 1 2/9/2016
MW-6D 71-43-2 Benzene 0.3 ug/l 1 1 2/14/2017
MW-6D 319-85-7 Beta-BHC 0.036 ug/l 0.019 0.05 2/9/2016
MW-6D 117-81-7 Bis-(2-Ethylhexyl) Phthalate 15.1 ug/l 3 15 2/7/2002
MW-6D 117-81-7 Bis-(2-Ethylhexyl) Phthalate 15.1 ug/l 3 15 8/9/2007
MW-6D 117-81-7 Bis-(2-Ethylhexyl) Phthalate 10.6 ug/l 3 15 2/18/2010
MW-6D 107-92-6 Butyric Acid 110 ug/L NE NE 2/24/2011
MW-6D 124-38-9 Carbon Dioxide 390 mg/l NE NE 8/19/2009
MW-6D 124-38-9 Carbon Dioxide 421 mg/l NE NE 2/18/2010
MW-6D 124-38-9 Carbon Dioxide 314000 ug/l NE 1000 8/25/2010
MW-6D 124-38-9 Carbon Dioxide 278000 ug/l NE 1000 2/22/2011
MW-6D 124-38-9 Carbon Dioxide 262000 ug/l NE 1000 8/25/2011
MW-6D 124-38-9 Carbon Dioxide 188000 ug/l NE 1000 2/22/2012
MW-6D 124-38-9 Carbon Dioxide 257000 ug/l NE 1000 8/30/2012
MW-6D 124-38-9 Carbon Dioxide 52000 ug/l NE 1000 2/11/2015
MW-6D 124-38-9 Carbon Dioxide 212000 ug/l NE 1000 8/26/2015
MW-6D 16887-00-6 Chloride 19 mg/l 250 5 8/19/2009
MW-6D 16887-00-6 Chloride 23 mg/l 250 5 2/18/2010
MW-6D 16887-00-6 Chloride 16000 ug/l 250000 5000 8/25/2010
MW-6D 16887-00-6 Chloride 22000 ug/l 250000 5000 2/22/2011
MW-6D 16887-00-6 Chloride 22000 ug/l 250000 5000 8/25/2011
MW-6D 16887-00-6 Chloride 23000 ug/l 250000 5000 2/22/2012
MW-6D 16887-00-6 Chloride 21000 ug/l 250000 5000 8/30/2012
MW-6D 16887-00-6 Chloride 25000 ug/l 250000 5000 2/20/2013
MW-6D 16887-00-6 Chloride 30000 ug/l 250000 5000 2/25/2014
MW-6D 16887-00-6 Chloride 20000 ug/l 250000 5000 2/11/2015
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-6D 16887-00-6 Chloride 31000 ug/l 250000 5000 2/9/2016
MW-6D 16887-00-6 Chloride 19000 ug/l 250000 5000 2/14/2017
MW-6D 108-90-7 Chlorobenzene 41 ug/l 50 3 8/10/2000
MW-6D 108-90-7 Chlorobenzene 7.4 ug/l 50 3 2/7/2002
MW-6D 108-90-7 Chlorobenzene 9.7 ug/l 50 3 2/7/2002
MW-6D 108-90-7 Chlorobenzene 15.7 ug/l 50 3 8/14/2002
MW-6D 108-90-7 Chlorobenzene 7.5 ug/l 50 3 2/12/2003
MW-6D 108-90-7 Chlorobenzene 5.5 ug/l 50 3 8/7/2003
MW-6D 108-90-7 Chlorobenzene 10.2 ug/l 50 3 8/12/2004
MW-6D 108-90-7 Chlorobenzene 7.9 ug/l 50 3 8/16/2005
MW-6D 108-90-7 Chlorobenzene 7.5 ug/l 50 3 2/14/2006
MW-6D 108-90-7 Chlorobenzene 7.6 ug/l 50 3 8/22/2006
MW-6D 108-90-7 Chlorobenzene 5.4 ug/l 50 3 2/14/2007
MW-6D 108-90-7 Chlorobenzene 9.7 ug/l 50 3 8/9/2007
MW-6D 108-90-7 Chlorobenzene 9.5 ug/l 50 3 2/19/2008
MW-6D 108-90-7 Chlorobenzene 11.9 ug/l 50 3 8/19/2008
MW-6D 108-90-7 Chlorobenzene 11.8 ug/l 50 3 2/17/2009
MW-6D 108-90-7 Chlorobenzene 10 ug/l 50 3 8/19/2009
MW-6D 108-90-7 Chlorobenzene 18.5 ug/l 50 3 2/18/2010
MW-6D 108-90-7 Chlorobenzene 10.3 ug/l 50 3 8/25/2010
MW-6D 108-90-7 Chlorobenzene 13 ug/l 50 3 2/22/2011
MW-6D 108-90-7 Chlorobenzene 7 ug/l 50 3 8/25/2011
MW-6D 108-90-7 Chlorobenzene 5.6 ug/l 50 3 2/22/2012
MW-6D 108-90-7 Chlorobenzene 8.5 ug/l 50 3 8/30/2012
MW-6D 108-90-7 Chlorobenzene 10.9 ug/l 50 3 2/20/2013
MW-6D 108-90-7 Chlorobenzene 10.1 ug/l 50 3 8/29/2013
MW-6D 108-90-7 Chlorobenzene 9.7 ug/l 50 3 2/25/2014
MW-6D 108-90-7 Chlorobenzene 9.6 ug/l 50 3 8/6/2014
MW-6D 108-90-7 Chlorobenzene 2.9 ug/l 50 3 2/11/2015
MW-6D 108-90-7 Chlorobenzene 6.2 ug/l 50 3 8/26/2015
MW-6D 108-90-7 Chlorobenzene 4.2 ug/l 50 3 2/9/2016
MW-6D 108-90-7 Chlorobenzene 2.2 ug/l 50 3 2/14/2017
MW-6D 75-00-3 Chloroethane 0.6 ug/l 3000 10 2/7/2002
MW-6D 75-00-3 Chloroethane 0.6 ug/l 3000 10 8/9/2007
MW-6D 75-00-3 Chloroethane 0.9 ug/l 3000 10 8/19/2008
MW-6D 75-00-3 Chloroethane 1.2 ug/l 3000 10 8/25/2010
MW-6D 75-00-3 Chloroethane 0.8 ug/l 3000 10 2/22/2011
MW-6D 75-00-3 Chloroethane 0.7 ug/l 3000 10 8/25/2011
MW-6D 75-00-3 Chloroethane 0.7 ug/l 3000 10 2/22/2012
MW-6D 75-00-3 Chloroethane 1 ug/l 3000 10 8/30/2012
MW-6D 75-00-3 Chloroethane 1.1 ug/l 3000 10 2/20/2013
MW-6D 75-00-3 Chloroethane 1.1 ug/l 3000 10 8/29/2013
MW-6D 75-00-3 Chloroethane 0.7 ug/l 3000 10 2/25/2014
MW-6D 75-00-3 Chloroethane 1.9 ug/l 3000 10 8/6/2014
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-6D 75-00-3 Chloroethane 0.6 ug/l 3000 10 8/26/2015
MW-6D 156-59-2 Cis-1,2-Dichloroethene 1.1 ug/l 70 5 2/19/2008
MW-6D 156-59-2 Cis-1,2-Dichloroethene 1.1 ug/l 70 5 8/19/2008
MW-6D 156-59-2 Cis-1,2-Dichloroethene 1 ug/l 70 5 2/17/2009
MW-6D 156-59-2 Cis-1,2-Dichloroethene 0.7 ug/l 70 5 8/19/2009
MW-6D 156-59-2 Cis-1,2-Dichloroethene 1.5 ug/l 70 5 2/18/2010
MW-6D 156-59-2 Cis-1,2-Dichloroethene 0.5 ug/l 70 5 8/25/2010
MW-6D 156-59-2 Cis-1,2-Dichloroethene 0.8 ug/l 70 5 2/22/2011
MW-6D 156-59-2 Cis-1,2-Dichloroethene 0.3 ug/l 70 5 8/30/2012
MW-6D 156-59-2 Cis-1,2-Dichloroethene 1.2 ug/l 70 5 2/20/2013
MW-6D 156-59-2 Cis-1,2-Dichloroethene 0.5 ug/l 70 5 8/29/2013
MW-6D 156-59-2 Cis-1,2-Dichloroethene 0.9 ug/l 70 5 2/25/2014
MW-6D 156-59-2 Cis-1,2-Dichloroethene 0.7 ug/l 70 5 8/6/2014
MW-6D 156-59-2 Cis-1,2-Dichloroethene 0.3 ug/l 70 5 8/26/2015
MW-6D 156-59-2 Cis-1,2-Dichloroethene 1.1 ug/l 70 5 2/9/2016
MW-6D 319-86-8 Delta-BHC 0.17 ug/l 0.019 0.05 10/7/1999
MW-6D 319-86-8 Delta-BHC 0.086 ug/l 0.019 0.05 2/2/2000
MW-6D 319-86-8 Delta-BHC 0.084 ug/l 0.019 0.05 8/12/2004
MW-6D 319-86-8 Delta-BHC 0.042 ug/l 0.019 0.05 2/19/2008
MW-6D 75-71-8 Dichlorodifluoromethane 0.2 ug/l 1000 5 2/7/2002
MW-6D 75-71-8 Dichlorodifluoromethane 0.2 ug/l 1000 5 8/9/2007
MW-6D 75-71-8 Dichlorodifluoromethane 0.2 ug/l 1000 5 8/19/2008
MW-6D 88-85-7 Dinoseb 2.3 ug/l 7 1 10/7/1999
MW-6D 74-84-0 Ethane 0.15 ug/L NE NE 2/24/2011
MW-6D 74-84-0 Ethane 0.46 ug/l NE NE 8/25/2011
MW-6D 74-84-0 Ethane 0.32 ug/l NE NE 2/22/2012
MW-6D 74-84-0 Ethane 0.56 ug/l NE NE 8/30/2012
MW-6D 74-84-0 Ethane 0.098 ug/l NE NE 2/11/2015
MW-6D 74-84-0 Ethane 0.61 ug/l NE NE 8/26/2015
MW-6D 74-85-1 Ethene 0.013 ug/L NE NE 2/24/2011
MW-6D 74-85-1 Ethene 0.12 ug/l NE NE 8/25/2011
MW-6D 74-85-1 Ethene 0.033 ug/l NE NE 2/22/2012
MW-6D 74-85-1 Ethene 0.088 ug/l NE NE 8/30/2012
MW-6D 74-85-1 Ethene 0.01 ug/l NE NE 2/11/2015
MW-6D 74-85-1 Ethene 0.046 ug/l NE NE 8/26/2015
MW-6D 76-44-8 Heptachlor 0.042 ug/l 0.008 0.05 8/19/2009
MW-6D 76-44-8 Heptachlor 0.043 ug/l 0.008 0.05 2/20/2013
MW-6D 1333-74-0 Hydrogen 0.48 nM NE NE 2/24/2011
MW-6D 1333-74-0 Hydrogen 4.9 nM NE NE 8/25/2011
MW-6D 1333-74-0 Hydrogen 1.2 nM NE NE 2/22/2012
MW-6D 1333-74-0 Hydrogen 3.4 nM NE NE 8/30/2012
MW-6D 1333-74-0 Hydrogen 1.6 nM NE NE 2/11/2015
MW-6D 1333-74-0 Hydrogen 2.7 nM NE NE 8/26/2015
MW-6D 50-21-5 Lactic Acid 210 ug/L NE NE 2/24/2011
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-6D 50-21-5 Lactic Acid 110 ug/l NE NE 8/25/2011
MW-6D 50-21-5 Lactic Acid 110 ug/l NE NE 2/11/2015
MW-6D 7439-97-6 Mercury 0.00008 mg/l 1 0.2 2/7/2002
MW-6D 7439-97-6 Mercury 0.0081 mg/l 1 0.2 2/15/2005
MW-6D 7439-97-6 Mercury 0.001 mg/l 1 0.2 8/16/2005
MW-6D 7439-97-6 Mercury 0.00008 mg/l 1 0.2 8/9/2007
MW-6D 7439-97-6 Mercury 0.00011 mg/l 1 0.2 8/19/2008
MW-6D 7439-97-6 Mercury 0.03 ug/l 1 0.2 2/17/2009
MW-6D 7439-97-6 Mercury 0.08 ug/l 1 0.2 8/19/2009
MW-6D 7439-97-6 Mercury 0.06 ug/l 1 0.2 8/30/2012
MW-6D 74-82-8 Methane 120 ug/L NE NE 2/24/2011
MW-6D 74-82-8 Methane 98 ug/l NE NE 8/25/2011
MW-6D 74-82-8 Methane 38 ug/l NE NE 2/22/2012
MW-6D 74-82-8 Methane 67 ug/l NE NE 8/30/2012
MW-6D 74-82-8 Methane 66 ug/l NE NE 2/11/2015
MW-6D 74-82-8 Methane 150 ug/l NE NE 8/26/2015
MW-6D 75-09-2 Methylene Chloride 0.2 ug/l 5 1 2/7/2002
MW-6D 75-09-2 Methylene Chloride 0.2 ug/l 5 1 8/9/2007
MW-6D 91-20-3 Naphthalene 44 ug/l 6 10 8/10/2000
MW-6D 79-09-4 Propionic Acid 62 ug/l NE NE 8/25/2011
MW-6D 108-88-3 Toluene 0.5 ug/l 600 1 2/7/2002
MW-6D 108-88-3 Toluene 0.5 ug/l 600 1 8/9/2007
MW-6D 108-88-3 Toluene 0.2 ug/l 600 1 2/19/2008
MW-6D 75-01-4 Vinyl chloride 1.4 ug/l 0.03 1 2/7/2002
MW-6D 75-01-4 Vinyl chloride 1.4 ug/l 0.03 1 8/9/2007
MW-6D 75-01-4 Vinyl chloride 0.9 ug/l 0.03 1 2/19/2008
MW-6D 75-01-4 Vinyl chloride 1.1 ug/l 0.03 1 8/19/2008
MW-6D 75-01-4 Vinyl Chloride 0.9 ug/l 0.03 1 2/17/2009
MW-6D 75-01-4 Vinyl Chloride 0.7 ug/l 0.03 1 8/19/2009
MW-6D 75-01-4 Vinyl Chloride 1.1 ug/l 0.03 1 2/18/2010
MW-6D 75-01-4 Vinyl Chloride 0.8 ug/l 0.03 1 2/22/2011
MW-6D 75-01-4 Vinyl Chloride 0.8 ug/l 0.03 1 8/6/2014
MW-6D 75-01-4 Vinyl Chloride 0.7 ug/l 0.03 1 2/9/2016
MW-6S 75-34-3 1,1-Dichloroethane 6 ug/l 6 5 2/25/1997
MW-6S 117-81-7 Bis-(2-Ethylhexyl) Phthalate 620 ug/l 3 15 2/25/1999
MW-6S 108-90-7 Chlorobenzene 5 ug/l 50 3 2/15/1996
MW-6S 108-90-7 Chlorobenzene 5.7 ug/l 50 3 2/2/1998
MW-6S 88-85-7 Dinoseb 2.3 ug/l 7 1 2/2/1998
MW-6S 78-59-1 Isophorone 10 ug/l 40 10 8/9/1995
MW-6S 7439-97-6 Mercury 0.5 ug/l 1 0.2 8/9/1995
MW-7D 78-93-3 2-Butanone (Methyl ethyl ketone) 1.9 ug/l 4000 100 2/7/2002
MW-7D 78-93-3 2-Butanone (Methyl ethyl ketone) 1.9 ug/l 4000 100 8/9/2007
MW-7D 78-93-3 2-Butanone (Methyl ethyl ketone) 3.6 ug/l 4000 100 8/19/2008
MW-7D 67-64-1 Acetone 1.3 ug/l 6000 100 2/7/2002
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
MW-7D 67-64-1 Acetone 1.3 ug/l 6000 100 8/9/2007
MW-7D 67-64-1 Acetone 3 ug/l 6000 100 2/19/2008
MW-7D 67-64-1 Acetone 5.1 ug/l 6000 100 8/19/2008
MW-7D 319-84-6 Alpha-BHC 0.037 ug/l 0.006 0.05 2/19/2008
MW-7D 117-81-7 Bis-(2-Ethylhexyl) Phthalate 23 ug/l 3 15 8/10/2000
MW-7D 117-81-7 Bis-(2-Ethylhexyl) Phthalate 31 ug/l 3 15 2/15/2005
MW-7D 117-81-7 Bis-(2-Ethylhexyl) Phthalate 14.8 ug/l 3 15 8/19/2008
MW-7D 117-81-7 Bis-(2-Ethylhexyl) Phthalate 11.1 ug/l 3 15 2/18/2010
MW-7D 319-86-8 Delta-BHC 0.043 ug/l 0.019 0.05 2/19/2008
MW-7D 7439-97-6 Mercury 0.00003 mg/l 1 0.2 8/19/2008
MW-7D 7439-97-6 Mercury 0.12 ug/l 1 0.2 8/20/2009
MW-7D 7439-97-6 Mercury 0.03 ug/l 1 0.2 2/18/2010
MW-7D 91-20-3 Naphthalene 5.8 ug/l 6 10 8/10/2000
MW-7D 127-18-4 Tetrachloroethene 1.1 ug/l 0.7 1 2/14/2017
MW-7D 108-88-3 Toluene 0.4 ug/l 600 1 2/7/2002
MW-7D 108-88-3 Toluene 0.4 ug/l 600 1 8/9/2007
MW-7D 108-88-3 Toluene 0.2 ug/l 600 1 2/19/2008
MW-7D 79-01-6 Trichloroethene 0.3 ug/l 3 1 2/14/2017
MW-7S 117-81-7 Bis-(2-Ethylhexyl) Phthalate 59 ug/l 3 15 2/25/1997
MW-7S 117-81-7 Bis-(2-Ethylhexyl) Phthalate 46 ug/l 3 15 2/25/1999
MW-7S 88-85-7 Dinoseb 1.6 ug/l 7 1 2/2/1998
MW-7S 88-85-7 Dinoseb 2.9 ug/l 7 1 4/16/1998
SW-1 78-93-3 2-Butanone (Methyl ethyl ketone) 1.9 ug/l 4000 100 2/7/2002
SW-1 78-93-3 2-Butanone (Methyl ethyl ketone) 1.9 ug/l 4000 100 8/9/2007
SW-1 78-93-3 2-Butanone (Methyl ethyl ketone) 4.2 ug/l 4000 100 8/19/2008
SW-1 78-93-3 2-Butanone (Methyl ethyl ketone) 1.6 ug/l 4000 100 8/18/2009
SW-1 78-93-3 2-Butanone (Methyl ethyl ketone) 2.4 ug/l 4000 100 8/23/2010
SW-1 67-64-1 Acetone 4.8 ug/l 6000 100 2/19/2008
SW-1 67-64-1 Acetone 6.1 ug/l 6000 100 8/19/2008
SW-1 67-64-1 Acetone 1.7 ug/l 6000 100 8/18/2009
SW-1 74-87-3 Chloromethane 0.2 ug/l 3 1 8/19/2008
SW-1 74-87-3 Chloromethane 0.3 ug/l 3 1 8/18/2009
SW-1 108-88-3 Toluene 0.4 ug/l 600 1 2/7/2002
SW-1 108-88-3 Toluene 0.4 ug/l 600 1 8/9/2007
SW-1 108-88-3 Toluene 0.4 ug/l 600 1 2/19/2008
SW-1 108-88-3 Toluene 0.2 ug/l 600 1 8/19/2008
SW-1 108-88-3 Toluene 0.3 ug/l 600 1 8/23/2010
SW-1 108-88-3 Toluene 0.3 ug/l 600 1 8/23/2011
SW-2 78-93-3 2-Butanone (Methyl ethyl ketone) 3.8 ug/l 4000 100 2/7/2002
SW-2 78-93-3 2-Butanone (Methyl ethyl ketone) 3.8 ug/l 4000 100 8/9/2007
SW-2 78-93-3 2-Butanone (Methyl ethyl ketone) 5.2 ug/l 4000 100 8/19/2008
SW-2 78-93-3 2-Butanone (Methyl ethyl ketone) 2.9 ug/l 4000 100 8/18/2009
SW-2 78-93-3 2-Butanone (Methyl ethyl ketone) 2.4 ug/l 4000 100 8/23/2010
SW-2 67-64-1 Acetone 2.2 ug/l 6000 100 2/7/2002
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 4
Historic Detections
Halifax County CAER Update
By: MG
Date:7/17/17
Well ID CAS Number Parameter Concentration Units
2L/GWP
Standard SWSL Collection
Date
SW-2 67-64-1 Acetone 2.2 ug/l 6000 100 8/9/2007
SW-2 67-64-1 Acetone 2.8 ug/l 6000 100 2/19/2008
SW-2 67-64-1 Acetone 7.4 ug/l 6000 100 8/19/2008
SW-2 67-64-1 Acetone 2 ug/l 6000 100 8/18/2009
SW-2 74-87-3 Chloromethane 0.4 ug/l 3 1 8/19/2008
SW-2 74-87-3 Chloromethane 0.4 ug/l 3 1 8/18/2009
SW-2 108-88-3 Toluene 0.3 ug/l 600 1 2/7/2002
SW-2 108-88-3 Toluene 0.3 ug/l 600 1 8/9/2007
SW-2 108-88-3 Toluene 0.5 ug/l 600 1 2/19/2008
SW-3 78-93-3 2-Butanone (Methyl ethyl ketone) 1.7 ug/l 4000 100 2/7/2002
SW-3 78-93-3 2-Butanone (Methyl ethyl ketone) 1.7 ug/l 4000 100 8/9/2007
SW-3 78-93-3 2-Butanone (Methyl ethyl ketone) 4.6 ug/l 4000 100 8/19/2008
SW-3 78-93-3 2-Butanone (Methyl ethyl ketone) 3.5 ug/l 4000 100 8/18/2009
SW-3 67-64-1 Acetone 2.6 ug/l 6000 100 2/7/2002
SW-3 67-64-1 Acetone 2.6 ug/l 6000 100 8/9/2007
SW-3 67-64-1 Acetone 2.5 ug/l 6000 100 2/19/2008
SW-3 67-64-1 Acetone 6.3 ug/l 6000 100 8/19/2008
SW-3 67-64-1 Acetone 2.4 ug/l 6000 100 8/18/2009
SW-3 74-87-3 Chloromethane 0.2 ug/l 3 1 8/19/2008
SW-3 74-87-3 Chloromethane 0.3 ug/l 3 1 8/18/2009
SW-3 156-59-2 Cis-1,2-Dichloroethene 0.2 ug/l 70 5 2/17/2009
SW-3 108-88-3 Toluene 0.3 ug/l 600 1 2/7/2002
SW-3 108-88-3 Toluene 0.3 ug/l 600 1 8/9/2007
SW-3 108-88-3 Toluene 0.3 ug/l 600 1 2/19/2008
SW-3 79-01-6 Trichloroethene 0.2 ug/l 3 1 2/17/2009
NOTE:
Detections over the 2L Standard are shown BOLD and highlighted
H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Historic Detections.xlsx
Table 5 February 2017 Inorganic DetectionsHalifax County CAER UpdateBy: MGDate:4/4/2017Monitoring LocationMDL SWSL2L or GWP* StandardMCL2B StandardMW-1 MW-2A MW-2AD MW-3AS MW-3D MW-6D MW-7D MW-15R MW-16A MW-17 MW-18S MW-18D SW-1 SW-2 SW-3Antimony 0.05 6 1 * 6 640 0.25 J <0.05 <0.05 <0.05 <0.05 0.2 J 0.05 J 0.14 J <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05Arsenic 0.66 10 10 10 10 0.86 J 1.5 J 0.84 J 1.8 J <0.66 <0.66 <0.66 <0.66 <0.66 <0.66 1.1 J <0.66 <0.66 0.94 J <0.66Barium 0.02 100 700 2000 200000 76.5 J 135 37.9 J 51.8 J 98.4 J 411 37.6 J 40.4 J 144 56.3 J 66.5 J 69.8 J 11.2 J 40 J 17.5 JBeryllium 0.04 1 4 * 4 6.5 0.66 J 0.68 J <0.04 <0.04 0.21 J 0.35 J <0.04 0.15 J 2 0.53 J 0.09 J <0.04 <0.04 <0.04 <0.04Cadmium 0.0512520.48 J 0.33 J 0.05 J 0.22 J 0.76 J 1 0.23 J 0.36 J 0.57 J 0.29 J 0.08 J 0.23 J <0.05 <0.05 <0.05Cobalt 0.04 10 1 * NE 4 1.5 J 4.6 J 2.4 J 0.43 J 0.3 J 3.7 J <0.04 0.34 J 1.2 J 0.36 J 6.5 J <0.04 0.07 J 0.6 J 0.1 JCobalt, dissolved 0.04 10 1 * NE 4 0.28 J 4.5 J 2.3 J 0.3 J 0.06 J 3.7 J NS 0.26 J 1.1 J 0.08 J 5.7 J NS NS NS NSChromium, total 0.06 10 10 100 50 1.5 J <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06Copper 0.07 10 1000 1300 7 2.5 J 1.3 J 0.16 J 0.21 J 1 J 1.1 J 0.61 J 0.82 J 0.94 J 1.1 J 0.14 J 0.29 J 0.09 J 0.25 J 0.12 JIron 5.23 300 300 300** 1000 NS33861 498 93225 1045 593NS NS NS1623 1019055 JNSNSNSIron, dissolved 5.23 300 300 300** 1000 NS 31.1 J 26.4 J339925.2 J 47.5 J NS NS NS 15.3 J 27.9 J <5.23 NS NS NSLead 0.06 10 15 15 25 5.4 J 1.5 J <0.06 0.06 J 0.58 J 0.38 J 0.07 J 0.21 J 1.4 J 1.8 J <0.06 <0.06 <0.06 0.15 J 0.09 JNickel 0.06 50 100 NE 88 1.5 J 1.3 J 0.59 J 0.78 J 0.99 J 2.4 J 0.35 J 0.6 J 0.79 J 1 J 2.1 J 0.77 J 0.38 J 1.6 J 0.42 JSelenium 0.54 10 20 50 5 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 4.8 J <0.54Silver 0.06 10 20 100 0.06 <0.06 <0.06 <0.06 <0.06 0.07 J <0.06 <0.06 <0.06 <0.06 0.08 J <0.06 <0.06 <0.06 <0.06 <0.06Thallium 0.05 5.5 0.28* 2 0.47 0.13 J 0.06 J <0.05 <0.05 <0.05 0.05 J <0.05 0.14 J 0.05 J <0.05 <0.05 <0.05 <0.05 0.05 J <0.05Tin 0.06 100 2000 * NE 800 NS 0.25 J <0.06 0.38 J 0.19 J 0.71 J NS 0.32 J 0.08 J 0.39 J 0.19 J NS NS NS NSVanadium 0.36 25 0.3 * NE NE 5.4 J 3.9 J <0.36 0.71 J <0.36 0.47 J <0.36 <0.36 0.93 J 1.2 J <0.36 0.5 J 2 J <0.36 0.6 JVanadium, dissolved 0.36 25 0.3 * NE NE <0.36 <0.36 NS <0.36 NS 0.53 J NS NS 0.98 J <0.36 NS 1.2 J NS NS NSZinc 1.61 10 1000 5000** 50 21 11 <1.61 2.4 J 8.3 J 34 2.9 J 4.2 J 13 11 2.8 J 3.2 J <1.61 3.4 J <1.61NOTE: MDL -Method Detection LimitSWSL -Solid Waste Section Quantitation Limits2L-Groundwater Standards (15A NCAC 2L 0200)GWP-Groundwater Protection Standards (noted by *)MCL - Federal Maximum Contaminant Limit** - National Secondary Drinking Water Standards2B-NCAC 2B Standard for Class C watersBold-Detection above 2L or GWP StandardJ-Laboratory defined detection between MDL and SWSL limit<MDL -Not detected at or above MDL valueNA - Parameter Not AnalyzedNE - Standard Not EstablishedTable units are presented in ug/l.Lab data analysis by Environment 1, Inc. Reports dated 03/29/2017 Client ID#6015H:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\Table 5 - Feb 2017 inorganics.xlsx
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Table 6 MNA Parameter SummaryHalifax County CAER UpdateBy: WWDate: 7/12/2017DateBOD (ug/l)COD (ug/l)Nitrate Nitrogen as N (ug/l)TOC (ug/l)Total Alkalinity (ug/l)Chloride (ug/l)Sulfate (ug/l)Sulfide (ug/l)Iron (ug/l)Turbidity (NTU)Dissolved Oxygen (ug/l)Carbon Dioxide (ug/l)ORP (mv)Dissolved Methane (ug/l)Ethane (ug/l)Ethene (ug/l)Hydrogen (nM)Lactic Acid (mg/l)Acetic Acid (mg/l)Propionic Acid (mg/l)Butyric Acid (mg/l)8/19/2009 5100 23000 90 J 5180 93000 7000 10100 J<1000 NS105 930 230000 -62.76000<0.010 0.0431.2 <0.100 <0.070 0.140<0.0702/16/2010 7800 13000 NS 1860 128000 5000 <25000<100019800 190 890 292000 60.615000.091 0.029<0.600 <0.100 <0.070 <0.070<0.0708/23/2010 7000 44000 80 J 6540 124000 6000 <25000<100019130 500 2940 72000 -26.759000.043 0.131.2 0.170<0.070 <0.050<0.0502/21/2011* 4400 24000 <10000 5640 106000 7000 <25000<100028850 15 1660 93000 -48.8<0.015<0.010 <0.010<0.600 <0.100 <0.070<0.050<0.0508/24/2011 <2000 26000 50 J 8540 101000 5000 6300 <100 26225 42 450 60000 -53.6 8800 <0.001 <0.010 3.5 0.260 0.110 0.079 <0.0502/20/2012 <2000 25000 <30 645 96000 6000 <5000 <100 23300 70 2210 85000 -39.2 3900 <0.001 <0.010 1.4 <0.10 <0.070 <0.050 <0.0508/30/2012 6700 27000 100 J 6970 91000 9800 7300 J <100 30725 35 150 118000 18.1 5800 <0.001 0.27 4.8 5.000 <0.070 <0.050 <0.0502/20/2013 NS 23000 110 J 6920 NS 10000 NS <100 27320 27 3810 NS 23 NS NS NS NS NS NS NS NS8/29/2013 NS 29000 <30 7250 NS 8000 NS <100 31275 180 2540 NS -38.7 NS NS NS NS NS NS NS NS2/25/2014 NS 20000 70 J 5130 NS 7000 NS <100 29725 160 610 NS 231.5 NS NS NS NS NS NS NS NS8/6/2014 NS 22000 0 5350 NS 7000 NS <100 21150 120 610 NS -17 NS NS NS NS NS NS NS NS2/11/2015 0 0 0 2300 NS 5000 NS <100 32700 21 1430 75000 70 2600 0.14 0.19 0.81 2.000 0.62 J <0.050 <0.0508/26/2015 0 0 0 2880 NS 7000 NS <100 27928 54 410 193000 11 3000 0.32 0.49 2.9 0.14 J 0.48 J <0.050 0.19 J2/9/2016 NS 31000 <40 4020 NS 31000 NS <100 39788 5.6 3990 NS 31 NS NS NS NS NS NS NS NS2/14/2017NS31000<33810NS32000NS<1003386150190NS78NSNSNSNSNSNSNSNS8/19/2009 <2000 10000 <10000 <1000 306000 7000 10500 J <1000 NS 25 1850 210000 43.1 410 0.098 0.38 1.1 0.160 <0.070 0.140 <0.0702/16/2010 <2000 12000 <10000 1040 284000 6000 23000 J <1000 3005 45 290 200000 91.1 780 0.12 1 1.1 0.110 <0.070 <0.070 <0.0708/23/2010 <2000 17000 <10000 1170 289000 5000 13600 J <1000 2565 20 580 171000 77.9 340 0.12 0.36 1.3 0.140 <0.070 <0.050 0.0542/21/2011 <2000 <10000 <10000 <1000 271000 6000 21300 J <1000 3500 25 920 118000 40.7 340 0.13 0.15 2 0.260 <0.070 <0.050 <0.0508/24/2011 <2000 <20000 <30 1000 242000 5000 12500 <100 3686 33 480 95000 34.2 670 0.054 0.1 3.4 0.160 0.086 0.078 <0.0502/20/2012 <2000 <20000 <30 <300 216000 5000 13200 J <100 2011 14 6140 54000 97.3 230 0.03 0.058 0.75 <0.10 <0.007 <0.007 <0.0508/30/2012 <2000 <20000 <30 1070 189000 8000 <5000 <100 6215 19 130 79000 59.3 700 0.052 0.28 4.7 <0.10 <0.007 <0.007 <0.0042/20/2013 NS <20000 <30 <300 NS 8000 NS <100 2260 60 1280 NS 23 NS NS NS NS NS NS NS NS8/29/2013 NS <20000 130 J 1220 NS 7000 NS <100 4820 20 750 NS 67.8 NS NS NS NS NS NS NS NS2/25/2014 NS <20000 <30 1210 NS 7000 NS <100 2957 21 1510 NS 232.4 NS NS NS NS NS NS NS NS8/6/2014 NS 0 0 1100 NS 8000 NS <100 5170 37 1340 NS 24 NS NS NS NS NS NS NS NS2/11/2015 0 0 0 0 NS 8000 NS <100 287 J 4.2 2070 32000 190 0.47 0.0047 J 0.013 1.6 210.000 0.56 J <0.011 <0.0078/26/2015 0 0 0 0 NS 10000 NS <100 6585 34 790 122000 24 1600 1.3 3.2 2.7 0.18 J 0.39 J <0.011 0.021 J2/9/2016 NS <20000 <40 1440 NS 6000 NS <100 2249 45 10470 NS 36 NS NS NS NS NS NS NS NS2/14/2017NS25000<3<120NS12000NS<1004981.72300NS83NSNSNSNSNSNSNSNS8/19/2009 20000 38000 <10000 6490 368000 14000 12200 J <1000 NS 600 1480 168000 -18.5 6300 2.2 <0.010 5.3 <0.100 0.079 0.170 <0.0702/16/2010 15000 38000 40 J 7500 435000 19000 NS <1000 102875 400 610 768000 42.4 5700 0.8 0.12 0.87 <0.100 <0.070 <0.070 <0.0708/23/2010 9200 44000 50 J 6370 313000 8000 <250000 <1000 72450 700 2060 427000 67.3 800 0.57 0.042 1.1 0.160 <0.070 <0.050 <0.0502/21/2011 8200 37000 <10000 6840 423000 12000 6400 J <1000 176000 380 2690 561000 -35 9000 1.05 <0.010 1.3 <0.100 <0.070 <0.050 0.1008/24/2011 <2000 27000 <30 3120 159000 7000 <5000 <100 72450 550 3190 215000 -57.3 1400 0.27 0.14 4.2 0.280 0.100 0.074 <0.0502/20/2012 11000 <20000 <30 5170 251000 7000 <5000 <100 213250 750 1480 458000 48.3 3000 0.51 0.22 0.63 <0.10 <0.070 <0.050 <0.0508/30/2012 30000 44000 <30 7580 337000 17000 6100 J <100 152600 550 1930 599000 20.6 8700 1.1 <0.002 4.7 0.230 <0.006 <0.007 <0.0042/20/2013 NS 32000 <30 6280 NS 12000 NS <100 88900 260 2150 NS -12.6 NS NS NS NS NS NS NS NS8/29/2013 NS 22000 70 J 3300 NS 11000 NS <100 203125 180 650 NS -43.4 NS NS NS NS NS NS NS NS2/25/2014 NS 48000 <30 8620 NS 18000 NS <100 203125 320 400 NS 225.6 NS NS NS NS NS NS NS NS8/6/2014 NS 46000 0 7980 NS 10000 NS <100 155625 310 870 NS -39 NS NS NS NS NS NS NS NS2/11/2015 15000 41000 70 J 7140 NS 10000 NS <100 70338 450 650 535000 -12 11000 0.25 <0.008 1.2 0.300 0.099 <0.011 <0.0078/26/2015 3200 0 0 1910 NS 0 NS <100 199722 350 390 175000 -25 1500 0.58 0.21 4.1 0.022 J 0.055 J <0.011 0.018 J2/9/2016 NS 65000 90 J 9210 NS 29000 NS <100 93225 320 2730 NS 32 NS NS NS NS NS NS NS NS2/14/2017NS44000<310830NS15000NS<100100250NS43NSNSNSNSNSNSNSNSMW-2AMW-2ADMW-3AS
Table 6 MNA Parameter SummaryHalifax County CAER UpdateBy: WWDate: 7/12/2017DateBOD (ug/l)COD (ug/l)Nitrate Nitrogen as N (ug/l)TOC (ug/l)Total Alkalinity (ug/l)Chloride (ug/l)Sulfate (ug/l)Sulfide (ug/l)Iron (ug/l)Turbidity (NTU)Dissolved Oxygen (ug/l)Carbon Dioxide (ug/l)ORP (mv)Dissolved Methane (ug/l)Ethane (ug/l)Ethene (ug/l)Hydrogen (nM)Lactic Acid (mg/l)Acetic Acid (mg/l)Propionic Acid (mg/l)Butyric Acid (mg/l)8/19/2009 <2000 12000 50 J <1000 63000 14000 14000 J <1000 NS <1 1680 112000 504.2 2800 <0.010 <0.010 1 <0.100 <0.070 0.150 <0.0702/16/2010 <2000 10000 70 J <1000 63000 9000 12200 J <1000 240 17 1190 123000 231.1 3000 <0.010 <0.010 0.67 <0.100 <0.070 <0.070 <0.0708/23/2010 <2000 16000 80 J 1020 66000 8000 8400 J <1000 <300 3.2 860 84000 585.3 3400 <0.010 <0.010 1.1 0.150 <0.070 <0.050 <0.0502/21/2011 <2000 16000 80 J <1000 63000 9000 <250000 <1000 <300 4.7 4910 65000 235.6 3300 <0.010 <0.010 0.79 0.230 <0.070 <0.050 0.1008/24/2011 <2000 <20000 80 J <300 64000 7000 10500 <100 96 1.4 1520 21000 353.6 3000 <0.010 0.03 5.5 0.220 <0.070 0.054 <0.0502/20/2012 2100 <20000 <30 <300 59000 9000 <5000 <100 112 J 1 2310 15000 243.1 2500 <0.010 0.069 0.9 0.120 <0.070 <0.050 0.248/30/2012 <2000 <20000 80 J <300 71000 12000 6200 J <100 140 J 1 210 88000 268.5 3900 <0.001 <0.002 2.2 <0.01 0.380 <0.007 <0.0042/20/2013 NS <20000 90 J <300 NS 9000 NS <100 168 J 2.5 2150 NS 30.6 NS NS NS NS NS NS NS NS8/29/2013 NS <20000 50 J <300 NS 10000 NS <100 291 J 9.9 660 NS 209.2 NS NS NS NS NS NS NS NS2/25/2014 NS <20000 150 J <300 NS 10000 NS <100 382 21 960 NS 228.9 NS NS NS NS NS NS NS NS8/6/2014 NS 0 0 1040 NS 9000 NS <100 371 8.7 1120 NS 75 NS NS NS NS NS NS NS NS2/11/2015 0 0 0 0 NS 8000 NS <100 78 J 1.5 800 61000 55 1600 <0.002 0.017 J 1.2 0.230 0.069 J <0.011 <0.0078/26/2015 0 <20000 80 J 0 NS 7000 NS <100 <8.64 2.3 350 87000 58 2100 0.016 -666 2.6 0.014 J 0.036 J <0.011 0.017 J2/9/2016 NS <20000 50 J 1070 NS 13000 NS <100 293 J 22 1880 NS -25 NS NS NS NS NS NS NS NS2/14/2017NS23000<3<120NS10000NS<10010452.61260NS130NSNSNSNSNSNSNSNS8/19/2009 <2000 11000 <10000 1610 261000 19000 165000 <1000 NS 10 1910 390000 86.7 180 0.27 0.036 1.3 <0.100 <0.070 0.140 <0.0702/16/2010 <2000 11000 <10000 2140 269000 23000 21300 J <1000 911 18 890 421000 95.7 93 0.13 <0.010 <0.600 <0.100 <0.070 <0.070 <0.0708/23/2010 2000 17000 <10000 2080 259000 16000 20400 <1000 589 18 1620 314000 92.9 200 0.33 0.049 1 0.140 <0.070 <0.050 <0.0502/21/2011 <2000 13000 <10000 1920 259000 22000 14400 J <1000 888 13 2680 278000 144.4 120 0.15 0.013 <0.600 0.210 <0.070 <0.050 0.1108/24/2011 <2000 <20000 <30 1820 234000 22000 12400 <100 796 <1 360 26200 147.1 98 0.46 0.12 4.9 0.110 <0.070 0.062 <0.0502/20/2012* <2000 <20000 <30 1810 216000 23000 10100 J <100 531 3 700 188000 151.1 38 0.32 0.033 1.2 <0.10 <0.070 <0.050 <0.0508/30/2012 <2000 <20000 <30 1930 223000 21000 6400 J <100 543 4.1 1020 257000 245.4 67 0.56 0.088 3.4 <0.01 <0.006 <0.007 <0.0042/20/2013 NS <20000 <30 2620 NS 25000 NS <100 753 2.9 1700 NS 27.1 NS NS NS NS NS NS NS NS8/29/2013 NS <20000 NS NS NS NS NS NS NS 24 1060 NS 138.3 NS NS NS NS NS NS NS NS2/25/2014 NS <20000 <30 1720 NS 30000 NS <100 2168 20 1180 NS 232.4 NS NS NS NS NS NS NS NS8/6/2014 NS 0 NS NS NS NS NS NS NS 19 1390 NS 91 NS NS NS NS NS NS NS NS2/11/2015 0 0 190 J 1560 NS 20000 NS <100 377 4.9 2050 52000 72 66 0.098 0.01 1.6 0.110 0.058 J <0.011 <0.0078/26/2015 0 <20000 NS NS NS NS NS NS NS 3.4 1590 212000 63 150 0.61 0.046 2.7 <0.012 0.022 J <0.011 <0.0072/9/2016 NS <20000 <40 2260 NS 31000 NS <100 806 15 910 NS 57 NS NS NS NS NS NS NS NS2/14/2017NS28000300 J2540NS19000NS<1005935.8570NS133NSNSNSNSNSNSNSNS8/19/2009 <2000 <10000 90 J <1000 53000 5000 10300 J <1000 5745 260 1240 92000 186.8 830 0.012 <0.010 1.1 0.250 0.072 0.160 <0.0702/16/2010 3400 <10000 130 J <1000 59000 7000 28700 J <1000 3115 100 360 75000 122.5 730 <0.010 <0.010 <0.600 <0.100 <0.070 <0.070 <0.0708/23/2010 <2000 <10000 60 J <1000 64000 6000 <250000 <1000 2316 160 600 122000 324.5 1300 <0.010 0.013 1.4 0.130 <0.070 <0.050 <0.0502/21/2011 <2000 <10000 140 J <1000 59000 6000 5600 J <1000 3356 150 1400 52000 164.3 1400 <0.010 <0.010 0.79 0.240 <0.070 <0.050 0.1008/24/2011 <2000 <20000 110 J <300 59000 6000 8900 <100 45140 70 740 68000 464.9 2000 <0.010 <0.010 1.5 0.220 <0.070 0.067 <0.0502/20/2012 <2000 33000 120 <300 306000 <5000 <5000 <100 548 240 2430 25000 217.9 1100 <0.010 <0.010 0.62 <0.10 <0.070 <0.050 <0.0508/30/2012 <2000 <20000 220 J <300 54000 10000 <5000 <100 548 22 390 55000 267.4 1100 <0.002 0.057 6.5 <0.190 <0.006 <0.007 <0.0042/20/2013 NS <20000 230 J <300 NS 8000 NS <100 616 9.1 6280 NS 54.5 NS NS NS NS NS NS NS NS8/29/2013 NS NS NS NS NS NS NS NS NS 65 750 NS 176.4 NS NS NS NS NS NS NS NS2/25/2014 NS <20000 280 J <300 NS 8000 NS <100 2637 130 840 NS 235.1 NS NS NS NS NS NS NS NS8/6/2014 NS NS NS NS NS NS NS NS NS 73 600 NS 87 NS NS NS NS NS NS NS NS2/11/2015 0 0 210 J 0 NS 0 NS <100 66 J 4.1 830 38000 84 1100 <0.001 <0.008 0.66 0.260 0.063 J <0.011 <0.0078/26/2015 0 NS NS NS NS NS NS NS NS 430 1410 60000 40 1300 0.014 0.013 3.1 <0.012 0.037 J <0.011 0.016 J2/9/2016 NS <20000 160 J 1160 NS 7000 NS <100 1138 29 430 NS 22 NS NS NS NS NS NS NS NS2/14/2017NS<840130 J<120NS9000NS<100162318260NS113NSNSNSNSNSNSNSNSMW-3DMW-17MW-6D
Table 6 MNA Parameter SummaryHalifax County CAER UpdateBy: WWDate: 7/12/2017DateBOD (ug/l)COD (ug/l)Nitrate Nitrogen as N (ug/l)TOC (ug/l)Total Alkalinity (ug/l)Chloride (ug/l)Sulfate (ug/l)Sulfide (ug/l)Iron (ug/l)Turbidity (NTU)Dissolved Oxygen (ug/l)Carbon Dioxide (ug/l)ORP (mv)Dissolved Methane (ug/l)Ethane (ug/l)Ethene (ug/l)Hydrogen (nM)Lactic Acid (mg/l)Acetic Acid (mg/l)Propionic Acid (mg/l)Butyric Acid (mg/l)8/19/2009 <2000 19000 <10000 4690 104000 11000 11400 J <1000 17675 210 1060 124000 12 4100 0.081 0.02 1.6 0.110 <0.070 0.140 <0.0702/16/2010 2600 13000 <10000 5800 116000 5000 <250000 <1000 20075 210 3180 82000 56.5 2900 0.018 0.011 <0.600 0.230 0.079 <0.070 <0.0708/23/2010 11000 38000 80 J 8770 81000 8000 <250000 <1000 23420 950 8210 75000 10.2 4700 0.26 0.054 1.1 0.210 <0.070 <0.050 <0.0502/21/2011 5500 19000 <10000 4740 105000 6000 <250000 <1000 24320 150 1110 72000 -36.3 4000 0.062 0.015 1.1 0.350 0.084 <0.050 <0.0508/24/2011 <2000 <20000 80 J 5020 96000 8000 <5000 <100 26950 190 830 75000 -36 4400 0.05 0.049 4.5 0.380 0.11 0.083 <0.0502/20/2012 <2000 29000 <30 7100 128000 <5000 <5000 <100 27030 1 790 71000 -54.1 3800 <0.010 <0.010 0.87 <0.10 0.12 <0.050 0.0938/30/2012 5900 23000 100 J 5510 76000 8000 <5000 <100 26750 180 290 70000 -4.3 4800 0.048 <0.004 6 0.260 <0.006 <0.007 <0.0042/20/2013 NS 31000 <30 6270 NS 6000 NS <100 85 J 250 7460 NS -12.1 NS NS NS NS NS NS NS NS8/29/2013 NS NS NS NS NS NS NS NS NS 230 900 NS 11.6 NS NS NS NS NS NS NS NS2/25/2014 NS <20000 80 J 5340 NS 9000 NS <100 38650 330 870 NS 237.9 NS NS NS NS NS NS NS NS8/6/2014 NS NS NS NS NS NS NS NS NS 160 1230 NS 6 NS NS NS NS NS NS NS NS2/11/2015 2200 0 60 J 4960 NS 5000 NS <100 31500 85 900 115000 62 9200 0.22 <0.008 1.1 0.230 0.071 <0.011 <0.0078/26/2015 0 NS NS NS NS NS NS NS NS 130 790 79000 -24 1200 0.59 0.048 2.9 <0.012 0.066J <0.011 0.019 J2/9/2016 NS 23000 60 J 2890 NS 26000 NS <100 25604 220 290 NS 69 NS NS NS NS NS NS NS NS2/14/2017NS26000<31810NS11000NS<1001019032260NS121NSNSNSNSNSNSNSNS2/16/2010 <2000 11000 <10000 1090 76000 10000 9900 J <1000 161 3.4 1930 55000 154.4 88 <0.010 <0.010 <0.600 0.190 <0.070 <0.070 <0.0702/21/2011 <2000 <10000 <10000 <1000 74000 5000 7200 J <1000 452 2.4 950 43000 106.5 46 <0.010 0.027 1.3 <0.100 <0.070 <0.050 <0.0502/20/2012 <2000 <2000 60 <300 6700 <5000 <5000 <100 NS 340 6600 15000 98 30 <0.010 0.68 0.68 0.100 0.26 0.065 0.238/30/2012 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS2/20/2013 NS <20000 110 J <300 NS 5000 NS <100 54550 1 3570 NS 64.5 NS NS NS NS NS NS NS NS8/29/2013 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS2/25/2014 NS <20000 90 J <300 NS 7000 NS <100 168 J 3.6 1580 NS 235.8 NS NS NS NS NS NS NS NS8/6/2014 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS2/11/2015 0 0 0 0 NS 5000 NS <100 19 J NS 5470 32000 72 6.6 0.0032 J 0.038 1.2 0.310 0.068 J <0.011 <0.0078/26/2015 0 NS NS NS NS NS NS NS NS NS NS 18000 NS 30 0.015 0.097 2.8 0.015 J 0.048 J <0.011 0.020 J2/9/2016 NS <20000 90 J <85 NS 9000 NS <100 95 J 1.6 840 NS 51 NS NS NS NS NS NS NS NS2/14/2017NS21000160 J<120NS12000NS<10055 J15420NS169NSNSNSNSNSNSNSNS8/23/2010 <2000 <10000 250 J 1930 72000 14000 18800 <100 6441 14 590 79000 -12.4 1000 <0.010 0.015 1.3 <0.100 <0.070 <0.050 <0.0508/24/2011 <2000 <20000 140 J 1400 47000 10000 16700 <100 5104 21 250 76000 45.4 30 <0.010 0.026 2.7 <0.100 <0.070 0.052 <0.0508/30/2012 2200 <20000 120 J 1790 30000 12000 9500 <100 5935 93 330 101000 211.2 42 <0.002 0.043 3.9 <0.010 <0.006 <0.007 <0.0042/20/2013 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS8/29/2013 NS 27000 120 J 2650 NS 11000 NS <100 24775 340 660 NS 242 NS NS NS NS NS NS NS NS2/25/2014 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS8/6/2014 NS 0 110 J 3140 NS 7000 NS <100 25975 230 1870 NS 100 NS NS NS NS NS NS NS NS2/11/2015 0 NS NS NS NS NS NS NS NS NS NS 47000 NS 3.9 0.0018 J <0.008 1.2 0.110 0.056 J <0.011 <0.0078/26/2015 0 0 430 J 1040 NS 7000 NS <100 216 J 2.9 960 82000 81 1.4 0.0043 J 0.012 2.6 <0.012 0.042 J <0.011 0.017 J2/9/2016 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS2/14/2017NSNSNSNSNSNSNSNSNSNSNSNSNSNSNSNSNSNSNSNSNSNOTE:* 2/20/2012 Sampe MW-6D was analyzed out of hold for Microseeps parametersNS= Parameter Not Analyzed*2/21/2011 Microseeps samples for MW-2A was unable to acieve sufficient vial pressure in the field. Additionally samples were diluted two times to achieve results. MW-18SMW-18DG-13
Table 6 MNA Parameter SummaryHalifax County CAER UpdateBy: WWDate: 7/12/2017Date8/19/20092/16/20108/23/20102/21/2011*8/24/20112/20/20128/30/20122/20/20138/29/20132/25/20148/6/20142/11/20158/26/20152/9/20162/14/20178/19/20092/16/20108/23/20102/21/20118/24/20112/20/20128/30/20122/20/20138/29/20132/25/20148/6/20142/11/20158/26/20152/9/20162/14/20178/19/20092/16/20108/23/20102/21/20118/24/20112/20/20128/30/20122/20/20138/29/20132/25/20148/6/20142/11/20158/26/20152/9/20162/14/2017MW-2AMW-2ADMW-3ASPyruvic Acid (mg/l)i-Pentanoic Acid (mg/l)Pentanoic Acid (mg/l)i-Hexanoic Acid (mg/l)Hexanoic Acid (mg/l)pH (std units)Specific Conductivity (umhos/cm)Temperature (degrees C)<0.070 <0.070 <0.070 <0.100<0.1006.00 249 24.00<0.070 <0.070 <0.070 <0.100 <0.100 6.78 278 12.55<0.150 <0.150 <0.070 <0.050 <0.050 6.05 268 20.24<0.150 <0.150 <0.070 <0.050 <0.050 6.23 212 11.67<0.15 <0.15 <0.070 <0.050 <0.050 6.07 237 21.43<0.15 <0.15 <0.070 <0.050 <0.050 5.84 196 11.71<0.15 <0.15 <0.070 <0.050 <0.050 6.21 249 20.09NS NS NS NS NS 6.30 207 11NS NS NS NS NS 6.00 240 22NS NS NS NS NS 6.80 232 11NS NS NS NS NS 6.20 501 22<0.15 <0.15 <0.070 <0.050 <0.050 6.10 287 10<0.15 <0.15 <0.070 <0.050 <0.050 6.10 254 21NS NS NS NS NS 6.10 330 13NSNSNSNSNS6.2019915<0.070 <0.070 <0.070 <0.100 <0.100 6.20 526 19.00<0.070 <0.070 <0.070 <0.100 <0.100 6.97 544 16.55<0.150 <0.150 <0.070 <0.050 <0.050 6.27 547 15.98<0.150 <0.150 <0.070 <0.050 <0.050 6.32 478 14.78<0.15 <0.15 <0.070 <0.050 <0.050 6.13 427 16.85<0.15 <0.15 <0.070 <0.050 <0.050 6.42 358 12.66<0.033 <0.044 <0.012 <0.006 <0.006 6.28 389 17.37NS NS NS NS NS 6.30 354 13NS NS NS NS NS 5.70 403 16NS NS NS NS NS 6.50 414 11NS NS NS NS NS 6.10 502 21<0.009 <0.008 <0.014 <0.100 <0.120 6.70 485 10<0.009 <0.008 <0.014 <0.100 <0.120 6.40 413 21NS NS NS NS NS 6.50 370 14NSNSNSNSNS7.1014215<0.070 <0.070 <0.070 <0.100 <0.100 6.00 601 20.00<0.070 <0.070 <0.070 <0.100 <0.100 6.92 852 13.29<0.150 <0.150 <0.070 <0.050 <0.050 6.20 713 17.33<0.150 <0.150 <0.070 <0.050 <0.050 6.32 660 13.06<0.15 <0.15 <0.070 <0.050 <0.050 6.40 378 20.20<0.15 <0.15 <0.070 <0.050 <0.050 5.72 489 14.09<0.033 <0.044 <0.012 <0.006 <0.006 6.12 758 20.11NS NS NS NS NS 6.30 668 14NS NS NS NS NS 6.10 422 19NS NS NS NS NS 6.80 910 14NS NS NS NS NS 6.00 892 19<0.009 <0.008 <0.014 <0.100 <0.120 6.10 906 14<0.009 <0.008 <0.014 <0.100 <0.120 6.40 357 19NS NS NS NS NS 6.20 941 13NSNSNSNSNS6.4046215
Table 6 MNA Parameter SummaryHalifax County CAER UpdateBy: WWDate: 7/12/2017Date8/19/20092/16/20108/23/20102/21/20118/24/20112/20/20128/30/20122/20/20138/29/20132/25/20148/6/20142/11/20158/26/20152/9/20162/14/20178/19/20092/16/20108/23/20102/21/20118/24/20112/20/2012*8/30/20122/20/20138/29/20132/25/20148/6/20142/11/20158/26/20152/9/20162/14/20178/19/20092/16/20108/23/20102/21/20118/24/20112/20/20128/30/20122/20/20138/29/20132/25/20148/6/20142/11/20158/26/20152/9/20162/14/2017MW-3DMW-17MW-6DPyruvic Acid (mg/l)i-Pentanoic Acid (mg/l)Pentanoic Acid (mg/l)i-Hexanoic Acid (mg/l)Hexanoic Acid (mg/l)pH (std units)Specific Conductivity (umhos/cm)Temperature (degrees C)<0.070 <0.070 <0.070 <0.100 <0.100 5.70 142 19.00<0.070 <0.070 <0.070 <0.100 <0.100 6.55 154 14.86<0.150 <0.150 <0.070 <0.050 <0.050 5.59 155 16.69<0.150 <0.150 <0.070 <0.050 <0.050 5.95 146 14.02<0.15 <0.15 <0.070 <0.050 <0.050 5.82 166 18.25<0.15 <0.15 <0.070 <0.050 <0.050 5.82 162 15.86<0.033 <0.044 <0.012 <0.006 <0.006 5.82 165 17.07NS NS NS NS NS 6.10 172 15NS NS NS NS NS 5.80 187 19NS NS NS NS NS 6.40 186 13NS NS NS NS NS 5.90 205 19<0.009 <0.008 <0.014 <0.100 <0.120 6.10 192 14<0.009 <0.008 <0.014 <0.100 <0.120 6.10 183 18NS NS NS NS NS 6.20 239 14NSNSNSNSNS6.7018616<0.070 <0.070 <0.070 <0.100 1.100 5.80 442 19.00<0.070 <0.070 <0.070 <0.100 <0.100 6.75 617 14.99<0.150 <0.150 <0.070 <0.050 <0.050 5.95 589 15.99<0.150 <0.150 <0.070 <0.050 <0.050 6.00 546 13.49<0.15 <0.15 <0.070 <0.050 <0.050 5.70 533 16.21<0.15 <0.15 <0.070 <0.050 <0.050 5.84 504 16.11<0.033 <0.044 <0.012 <0.006 <0.006 5.90 521 17.58NS NS NS NS NS 6.10 544 15NS NS NS NS NS 5.70 558 18NS NS NS NS NS 6.50 592 13NS NS NS NS NS 5.90 569 17<0.009 <0.008 <0.014 <0.100 <0.120 6.50 454 14<0.009 <0.008 <0.014 <0.100 <0.120 6.10 423 18NS NS NS NS NS 6.10 523 14NSNSNSNSNS6.6041214<0.070 <0.070 <0.070 <0.100 <0.100 5.70 133 19.00<0.070 <0.070 <0.070 <0.100 <0.100 6.53 131 14.41<0.150 <0.150 <0.070 <0.050 <0.050 5.88 142 17.12<0.150 <0.150 <0.070 <0.050 <0.050 6.03 126 12.80<0.15 <0.15 <0.070 <0.050 <0.050 5.76 142 19.80<0.15 <0.15 <0.070 <0.050 <0.050 5.50 127 11.96<0.033 <0.044 <0.012 <0.006 <0.006 5.94 128 17.97NS NS NS NS NS 6.10 124 11NS NS NS NS NS 5.60 137 20NS NS NS NS NS 6.60 133 9NS NS NS NS NS 5.80 170 19<0.009 <0.008 <0.014 <0.100 <0.120 6.00 146 10<0.009 <0.008 <0.014 <0.100 <0.120 6.10 126 24NS NS NS NS NS 6.10 165 12NSNSNSNSNS6.0012814
Table 6 MNA Parameter SummaryHalifax County CAER UpdateBy: WWDate: 7/12/2017Date8/19/20092/16/20108/23/20102/21/20118/24/20112/20/20128/30/20122/20/20138/29/20132/25/20148/6/20142/11/20158/26/20152/9/20162/14/20172/16/20102/21/20112/20/20128/30/20122/20/20138/29/20132/25/20148/6/20142/11/20158/26/20152/9/20162/14/20178/23/20108/24/20118/30/20122/20/20138/29/20132/25/20148/6/20142/11/20158/26/20152/9/20162/14/2017MW-18SMW-18DG-13Pyruvic Acid (mg/l)i-Pentanoic Acid (mg/l)Pentanoic Acid (mg/l)i-Hexanoic Acid (mg/l)Hexanoic Acid (mg/l)pH (std units)Specific Conductivity (umhos/cm)Temperature (degrees C)<0.070 <0.070 <0.070 <0.100 <0.100 6.30 258 21.00<0.070 <0.070 <0.070 <0.100 <0.100 7.04 269 12.96<0.150 <0.150 <0.070 <0.050 <0.050 6.60 248 18.20<0.150 <0.150 <0.070 <0.050 <0.050 6.48 226 12.18<0.15 <0.15 <0.070 <0.050 <0.050 6.58 221 16.49<0.15 <0.15 <0.070 <0.050 <0.050 6.13 241 13.49<0.033 <0.044 <0.012 <0.006 <0.006 6.37 233 17.27NS NS NS NS NS 6.50 255 13NS NS NS NS NS 6.10 176 21NS NS NS NS NS 6.50 238 9NS NS NS NS NS 6.20 216 21<0.009 <0.008 <0.014 <0.100 <0.120 6.40 278 9<0.009 <0.008 <0.014 <0.100 <0.120 6.30 330 22NS NS NS NS NS 6.50 255 11NSNSNSNSNS6.5017310<0.070 <0.070 <0.070 <0.100 <0.100 6.63 166 9.65<0.150 <0.150 <0.070 <0.050 <0.050 6.16 143 13.62<0.15 <0.15 <0.070 <0.050 <0.050 6.16 131 13.36NS NS NS NS NS NS NS NSNS NS NS NS NS 6.30 146 11NS NS NS NS NS NS NS NSNS NS NS NS NS 6.30 160 9NS NS NS NS NS NS NS NS<0.009 <0.008 <0.014 <0.100 <0.120 6.40 151 8<0.009 <0.008 <0.014 <0.100 <0.120 NS NS NSNS NS NS NS NS 6.30 202 11NSNSNSNSNS6.6013013<0.150 <0.150 <0.070 <0.050 <0.050 6.05 18.22 224.00<0.150 <0.150 <0.070 <0.050 <0.050 5.67 127 17.82<0.033 <0.044 <0.012 <0.006 <0.006 5.40 120 18.65NS NS NS NS NS NS NS NSNS NS NS NS NS 4.60 108 18NS NS NS NS NS NS NS NSNS NS NS NS NS 5.30 113 18<0.009 <0.008 <0.014 <0.100 <0.120 NS NS NS<0.009 <0.008 <0.014 <0.100 <0.120 5.20 76 19NS NS NS NS NS NS NS NSNSNSNSNSNSNSNSNS
Table 7Proposed Sampling ScheduleHalifax County CAER UpdateBy: MGDate: 7/17/2017WellDetection MonitoringAssessment Monitoring*pH DO ORP Turbidity TemperatureSpecific ConductivitySulfide Iron Chloride Nitrate TOC CODMW-1 semi semi semi semi semi semi semi NM NM NM NM NM NMMW-2Asemi * semi semi semi semi semi semi semi semi semi semi semi semiMW-2ADsemi * semi semi semi semi semi semi semi semi semi semi semi semiMW-3Asemi semi semi semi semi semi semi NM NM NM NM NM NMMW-3ASsemi * semi semi semi semi semi semi semi semi semi semi semi semiMW-3Dsemi * semi semi semi semi semi semi semi semi semi semi semi semiMW-6Dsemi * semi semi semi semi semi semi A-spring A-spring A-spring A-spring A-spring A-springMW-7Dsemi 3 semi semi semi semi semi semi NM NM NM NM NM NMMW-15Rsemi * semi semi semi semi semi semi NM NM NM NM NM NMMW-16Asemi * semi semi semi semi semi semi NM NM NM NM NM NMMW-17 semi * semi semi semi semi semi semi A-spring A-spring A-spring A-spring A-spring A-springMW-18Ssemi * semi semi semi semi semi semi A-spring A-spring A-spring A-spring A-spring A-springMW-18DA-spring A-spring A-spring A-spring A-spring A-spring A-spring A-spring A-spring A-spring A-spring A-spring A-springG-13A-fall A-fall A-fall A-fall A-fall A-fall A-fall NM NM NM NM NM NMG13DA-fall A-fall A-fall A-fall A-fall A-fall A-fall NM NM NM NM NM NMWellDissolved MethaneVFA CO2 Hydrogen BODethane/ etheneMW-1 NM NM NM NM NM NMMW-2A333333MW-2AD3 3 3 3 3 3 NOTE:MW-3ANM NM NM NM NM NMMW-3AS333333MW-3D333333A-spring = well sampled annually spring event onlyMW-6D333333A- fall = well sampled annually fall event onlyMW-7DNM NM NM NM NM NMNM = Not MonitoredMW-15RNM NM NM NM NM NM3 = well sampled every third year(both sampling events)MW-16ANM NM NM NM NM NM (2018, 2021, 2024, etc)MW-17 3 3 3 3 3 3 7D monitored App II every 3rd year (2018, 2021, 2024, etc)MW-18S333333MW-18D333333G-13NM NM NM NM NM NMG13DNM NM NM NM NM NM* Assesment monitoring is performed annually with detected parameters analyzed semi-annuallyH:\Projects\Halifax County (NC)\02 HC Compliance\02 HC Assessment & Corrective Action\CAER _ Update\tables\table -sampling schedule.xlsx
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APPENDIX A
Well Information

Corrective Action Evaluation Report Update
Halifax County
Halifax, North Carolina

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APPENDIX B
Concentration Graphs

Corrective Action Evaluation Report Update
Halifax County
Halifax, North Carolina

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MW-16A

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0.005.0010.0015.0020.0025.004/19/20011/14/200410/10/20067/6/20094/1/201212/27/20149/22/20176/18/2020concentration (ug/l)date1,1‐DichloroethaneMW‐16A2L
0.000.200.400.600.801.001.2010/10/20062/22/20087/6/200911/18/20104/1/20128/14/201312/27/20145/10/20169/22/2017Concentration (ug/l)Date1,2‐DichloropropaneMW‐16A2L
0.001.002.003.004.005.006.0010/10/20062/22/20087/6/200911/18/20104/1/20128/14/201312/27/20145/10/20169/22/2017Concentration (ug/l)DateBenzeneMW‐16A2L
0.0010.0020.0030.0040.0050.0060.0070.0080.004/19/20011/14/200410/10/20067/6/20094/1/201212/27/20149/22/20176/18/2020Concentration (ug/l)DateTetrachloroetheneMW‐16A2L
0.005.0010.0015.0020.0025.0030.0035.0040.004/19/20011/14/200410/10/20067/6/20094/1/201212/27/20149/22/20176/18/2020Concentration (ug/l)DateTrichloroetheneMW‐16A2L
0.000.200.400.600.801.001.201.401.601.802.0010/10/20062/22/20087/6/200911/18/20104/1/20128/14/201312/27/20145/10/20169/22/2017Concentration (ug/l)DateVinyl ChlorideMW‐16A2L

Downgradient Wells

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0.005.0010.0015.0020.0025.0030.0035.0040.0010/28/199510/27/199610/27/199710/27/199810/27/199910/26/200010/26/200110/26/200210/26/200310/25/200410/25/200510/25/200610/25/200710/24/200810/24/200910/24/201010/24/201110/23/201210/23/201310/23/201410/23/201510/22/2016Concentration (ug/l)Date1,1‐DichloroethaneMW‐17MW‐18SMW‐2AMW‐2ADMW‐3ASMW‐3D2L
0.000.200.400.600.801.001.201.407/24/19984/19/20011/14/200410/10/20067/6/20094/1/201212/27/20149/22/20176/18/2020Concentration (ug/l)Date1,2‐DichloropropaneMW‐2AD2L
0.000.501.001.502.002.503.003.5010/10/20062/22/20087/6/200911/18/20104/1/20128/14/201312/27/20145/10/20169/22/2017Concentration (ug/l)DateBenzeneMW‐2ADMW‐3ASMW‐6D2L
0.000.501.001.502.002.503.0010/10/20062/22/20087/6/200911/18/20104/1/20128/14/201312/27/20145/10/20169/22/2017Concentration (ug/l)DateTetrachloroetheneMW‐17MW‐2ADMW‐3DMW‐7D2L
0.002.004.006.008.0010.0012.009/1/20029/1/20038/31/20048/31/20058/31/20068/31/20078/30/20088/30/20098/30/20108/30/20118/29/20128/29/20138/29/20148/29/20158/28/20168/28/2017Concentration (ug/l)DateTrichloroetheneMW‐2AD2L
0.005.0010.0015.0020.0025.0010/10/20062/22/20087/6/200911/18/20104/1/20128/14/201312/27/20145/10/20169/22/2017Concentration (ug/l)DateVinyl ChlorideMW‐17MW‐18SMW‐2AMW‐2ADMW‐3AS2L

APPENDIX C
Biochlor Models

Corrective Action Evaluation Report Update
Halifax County
Halifax, North Carolina

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Natural Attenuation Interpretation Score
Screening Inadequate evidence for anaerobic biodegradation* of chlorinated organics 0 to 5
Protocol Limited evidence for anaerobic biodegradation* of chlorinated organics 6 to 14 Score:11
Adequate evidence for anaerobic biodegradation* of chlorinated organics 15 to 20
Strong evidence for anaerobic biodegradation* of chlorinated organics >20 Scroll to End of Table
Concentration in PointsAnalysisMost Contam. Zone Interpretation Yes No Awarded
Oxygen* <0.5 mg/L Tolerated, suppresses the reductive pathway at higher
concentrations
> 5mg/L Not tolerated; however, VC may be oxidized aerobically -3
Nitrate* <1 mg/L At higher concentrations may compete with reductive 2
pathway
Iron II* >1 mg/L Reductive pathway possible; VC may be oxidized under
Fe(III)-reducing conditions
Sulfate* <20 mg/L At higher concentrations may compete with reductive 2
pathway
Sulfide* >1 mg/L Reductive pathway possible

Methane* >0.5 mg/L Ultimate reductive daughter product, VC Accumulates
Oxidation <50 millivolts (mV) Reductive pathway possible
Reduction
Potential* (ORP) <-100mV Reductive pathway likely

pH* 5 < pH < 9 Optimal range for reductive pathway 0
TOC >20 mg/L Carbon and energy source; drives dechlorination; can be 0
natural or anthropogenic
Temperature*>20oC At T >20
oC biochemical process is accelerated 0
Carbon Dioxide >2x background Ultimate oxidative daughter product
Alkalinity >2x background Results from interaction of carbon dioxide with aquifer
minerals
Chloride* >2x background Daughter product of organic chlorine 2
Hydrogen >1 nM Reductive pathway possible, VC may accumulate
Volatile Fatty Acids >0.1 mg/L Intermediates resulting from biodegradation of aromatic 2
compounds; carbon and energy source
BTEX* >0.1 mg/L Carbon and energy source; drives dechlorination
PCE* Material released 0
TCE*Daughter product of PCE a/2

DCE* Daughter product of TCE.
If cis is greater than 80% of total DCE it is likely a daughter 2
product of TCEa/; 1,1-DCE can be a chem. reaction product of TCA
VC*Daughter product of DCEa/0
1,1,1- Material released 0
Trichloroethane*
DCA Daughter product of TCA under reducing conditions 2
Carbon Material released
Tetrachloride
Chloroethane* Daughter product of DCA or VC under reducing conditions
Ethene/Ethane >0.01 mg/L Daughter product of VC/ethene
>0.1 mg/L Daughter product of VC/ethene
Chloroform Daughter product of Carbon Tetrachloride
Dichloromethane Daughter product of Chloroform

* required analysis.
a/ Points awarded only if it can be shown that the compound is a daughter product
(i.e., not a constituent of the source NAPL).
End of Form
RSC
* reductive dechlorination
The following is taken from the USEPA protocol (USEPA, 1998). The results of this scoring process have no regulatory significance.
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BIOCHLOR Natural Attenuation Decision Support SystemHalifax CountyData Input Instructions:Version 2.2Downgradient Plume115 1. Enter value directly....orExcel 2000Run Name 2. Calculate by filling in gray TYPE OF CHLORINATED SOLVENT:Ethenes5. GENERAL 0.02 cells. Press Enter, then Ethanes Simulation Time* 10 (yr)(To restore formulas, hit "Restore Formulas" button )1. ADVECTIONModeled Area Width* 1350 (ft) Variable* Data used directly in model. Seepage Velocity* Vs 66.6(ft/yr)Modeled Area Length* 150 (ft) Test iforZone 1 Length* 150 (ft) BiotransformationHydraulic Conductivity K 3.785E-04(cm/sec)Zone 2 Length* 0 (ft) is OccurringHydraulic Gradient i 0.034(ft/ft)Effective Porosity n 0.2(-)6. SOURCE DATA TYPE: Decaying2. DISPERSION Single PlanarAlpha x* 15 (ft)(Alpha y) / (Alpha x)* 0.1 (-) Source Thickness in Sat. Zone* 25 (ft)(Alpha z) / (Alpha x)* 1.E-99 (-) Y13. ADSORPTION Width* (ft) 1350Retardation Factor* Rks*orConc. (mg/L)*C1(1/yr)Soil Bulk Density, rho 1.7 (kg/L) PCE .04 0.2FractionOrganicCarbon, foc1.0E-3(-) TCE 5.5 0.2 View of Plume Looking DownPartition Coefficient Koc DCE 3.25 0.2PCE 426 (L/kg) 4.62 (-) VC 1.6 0.2 Observed Centerline Conc. at Monitoring Wells TCE 130 (L/kg) 2.11 (-) ETH 0.03 0.2DCE 125 (L/kg) 2.06 (-) VC 30 (L/kg) 1.25 (-)7. FIELD DATA FOR COMPARISONETH 302 (L/kg) 3.57 (-) PCE Conc. (mg/L)0.0 0.4 1.1Common R (used in model)* = 2.11TCE Conc. (mg/L)0.0 1.2 2.24. BIOTRANSFORMATION-1st Order Decay Coefficient* DCE Conc. (mg/L)0.3 8.30 10.80Zone 1 (1/yr)half-life (yrs) YieldVC Conc. (mg/L)0.0 0.0 0.0PCE TCE9.9000.070.79ETH Conc. (mg/L)TCE DCE13.8600.050.74Distance from Source (ft)100 125 150DCE VC3.8500.180.64Date Data Collected2017VC ETH5.7750.120.458. CHOOSE TYPE OF OUTPUT TO SEE:Zone 2 (1/yr)half-life (yrs) PCE TCE0.000TCE DCE0.000DCE VC0.000VC ETH0.000Vertical Plane Source: Determine Source Well Location and Input Solvent ConcentrationsPaste Restore RUN CENTERLINE HelpNatural AttenuationLWorRUN ARRAYZone 2=CRESETSource OptionsSEE HELPCalc.
DISSOLVED CHLORINATED SOLVENT CONCENTRATIONS ALONG PLUME CENTERLINE (mg/L) at Z=0Distance from Source (ft)PCE0 15 30 45 60 75 90 105 120 135 150No Degradation0.005 0.006 0.007 0.007 0.008 0.009 0.010 0.011 0.011 0.012 0.013Biotransformation0.0054 0.002 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Monitoring Well Locations (ft)100 125 150Field Data from Site0.000 0.400 1.100Time:10.0 YearsReturn to InputSee PCESee TCESee DCETo All015304560901051201351500.0010.0100.1001.00010.0000 20 40 60 80 100 120 140 160Concentration (mg/L)Distance From Source (ft.)No Degradation/ProductionSequential 1st Order DecayField Data from SiteTo ArrayLog Linear Prepare AnimationSee VCSee ETH
DISSOLVED CHLORINATED SOLVENT CONCENTRATIONS ALONG PLUME CENTERLINE (mg/L) at Z=0Distance from Source (ft)TCE0 15 30 45 60 75 90 105 120 135 150No Degradation0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.937Biotransformation0.7443 0.202 0.055 0.015 0.004 0.001 0.000 0.000 0.000 0.000 0.000Monitoring Well Locations (ft)100 125 150Field Data from Site0.000 1.200 2.200Time:10.0 YearsReturn to InputSee PCESee TCESee DCETo All015304560901051201351500.0010.0100.1001.00010.0000 20 40 60 80 100 120 140 160Concentration (mg/L)Distance From Source (ft.)No Degradation/ProductionSequential 1st Order DecayField Data from SiteTo ArrayLog Linear Prepare AnimationSee VCSee ETH
DISSOLVED CHLORINATED SOLVENT CONCENTRATIONS ALONG PLUME CENTERLINE (mg/L) at Z=0Distance from Source (ft)DCE0 15 30 45 60 75 90 105 120 135 150No Degradation0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.145Biotransformation0.4398 0.516 0.377 0.245 0.152 0.093 0.056 0.034 0.020 0.012 0.007Monitoring Well Locations (ft)100 125 150Field Data from Site0.300 8.300 10.800Time:10.0 YearsReturn to InputSee PCESee TCESee DCETo All015304560901051201351500.0010.0100.1001.00010.000100.0000 20 40 60 80 100 120 140 160Concentration (mg/L)Distance From Source (ft.)No Degradation/ProductionSequential 1st Order DecayField Data from SiteTo ArrayLog Linear Prepare AnimationSee VCSee ETH
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.005 0.002 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000270 0.005 0.002 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0000 0.005 0.002 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000-270 0.005 0.002 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000-540 0.005 0.002 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00098.500MASS1.9E+2 6.6E+1 2.3E+1 8.2E+0 2.9E+0 1.0E+0 3.6E-1 1.3E-1 4.4E-2 1.6E-2 5.5E-3RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.005mg/L Displayed Model: Biotransformation PCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation0.6(Kg) - Plume Mass If Biotransformation/Production 0.0(Kg) Mass Removed 0.6(Kg)% Biotransformed =+94.2%% Change in Mass Rate = 100.0 % Current Volume of Ground Water in Plume0.76MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr. 0.00# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.000.000.000.000.010.010153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.744 0.202 0.055 0.015 0.004 0.001 0.000 0.000 0.000 0.000 0.000270 0.744 0.202 0.055 0.015 0.004 0.001 0.000 0.000 0.000 0.000 0.0000 0.744 0.202 0.055 0.015 0.004 0.001 0.000 0.000 0.000 0.000 0.000-270 0.744 0.202 0.055 0.015 0.004 0.001 0.000 0.000 0.000 0.000 0.000-540 0.744 0.202 0.055 0.015 0.004 0.001 0.000 0.000 0.000 0.000 0.00098.500MASS2.6E+4 7.0E+3 1.9E+3 5.2E+2 1.4E+2 3.8E+1 1.1E+1 2.9E+0 8.0E-1 2.2E-1 6.3E-2RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.005mg/L Displayed Model: Biotransformation TCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation83.1(Kg) - Plume Mass If Biotransformation/Production 3.9(Kg) Mass Removed 79.2(Kg)% Biotransformed =+95.3%% Change in Mass Rate = 100.0 % Current Volume of Ground Water in Plume3.03MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr. 0.00# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.100.200.300.400.500.600.700.800153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.440 0.516 0.377 0.245 0.152 0.093 0.056 0.034 0.020 0.012 0.007270 0.440 0.516 0.377 0.245 0.152 0.093 0.056 0.034 0.020 0.012 0.0070 0.440 0.516 0.377 0.245 0.152 0.093 0.056 0.034 0.020 0.012 0.007-270 0.440 0.516 0.377 0.245 0.152 0.093 0.056 0.034 0.020 0.012 0.007-540 0.440 0.516 0.377 0.245 0.152 0.093 0.056 0.034 0.020 0.012 0.00798.500MASS1.5E+4 1.8E+4 1.3E+4 8.5E+3 5.3E+3 3.2E+3 1.9E+3 1.2E+3 7.0E+2 4.2E+2 2.5E+2RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.070mg/L Displayed Model: Biotransformation DCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation49.1(Kg) - Plume Mass If Biotransformation/Production 10.4(Kg) Mass Removed 38.7(Kg)% Biotransformed =+78.7%% Change in Mass Rate = 98.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.100.200.300.400.500.600153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.217 0.220 0.193 0.151 0.109 0.075 0.050 0.032 0.021 0.013 0.008270 0.217 0.220 0.193 0.151 0.109 0.075 0.050 0.032 0.021 0.013 0.0080 0.217 0.220 0.193 0.151 0.109 0.075 0.050 0.032 0.021 0.013 0.008-270 0.217 0.220 0.193 0.151 0.109 0.075 0.050 0.032 0.021 0.013 0.008-540 0.217 0.220 0.193 0.151 0.109 0.075 0.050 0.032 0.021 0.013 0.00898.500MASS7.5E+3 7.7E+3 6.7E+3 5.3E+3 3.8E+3 2.6E+3 1.7E+3 1.1E+3 7.2E+2 4.5E+2 2.8E+2RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.002mg/L Displayed Model: Biotransformation VCPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation24.2(Kg) - Plume Mass If Biotransformation/Production 5.9(Kg) Mass Removed 18.3(Kg)% Biotransformed =+75.5%% Change in Mass Rate = 96.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.050.100.150.200.250153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.004 0.141 0.272 0.390 0.496 0.591 0.680 0.765 0.848 0.928 1.007270 0.004 0.141 0.272 0.390 0.496 0.591 0.680 0.765 0.848 0.928 1.0070 0.004 0.141 0.272 0.390 0.496 0.591 0.680 0.765 0.848 0.928 1.007-270 0.004 0.141 0.272 0.390 0.496 0.591 0.680 0.765 0.848 0.928 1.007-540 0.004 0.141 0.272 0.390 0.496 0.591 0.680 0.765 0.848 0.928 1.00798.500MASS1.4E+2 4.9E+3 9.5E+3 1.4E+4 1.7E+4 2.1E+4 2.4E+4 2.7E+4 3.0E+4 3.2E+4 3.5E+4RATEDisplayed Compound(mg/day)Time:10 yr Target Level: mg/L Displayed Model: Biotransformation ETHPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation0.5(Kg) - Plume Mass If Biotransformation/Production 36.9(Kg) Mass Removed -36.5(Kg)% Biotransformed =-8042.2 %% Change in Mass Rate = -24699.1 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.200.400.600.801.001.200153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.005 0.006 0.007 0.007 0.008 0.009 0.010 0.011 0.011 0.012 0.013270 0.005 0.006 0.007 0.007 0.008 0.009 0.010 0.011 0.011 0.012 0.0130 0.005 0.006 0.007 0.007 0.008 0.009 0.010 0.011 0.011 0.012 0.013-270 0.005 0.006 0.007 0.007 0.008 0.009 0.010 0.011 0.011 0.012 0.013-540 0.005 0.006 0.007 0.007 0.008 0.009 0.010 0.011 0.011 0.012 0.01398.500MASS1.9E+2 2.1E+2 2.3E+2 2.5E+2 2.8E+2 3.1E+2 3.4E+2 3.7E+2 4.0E+2 4.3E+2 4.6E+2RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.005mg/L Displayed Model: No Degradation PCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation0.6(Kg) - Plume Mass If Biotransformation/Production 0.0(Kg) Mass Removed 0.6(Kg)% Biotransformed =+94.2%% Change in Mass Rate = -145.7 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.000.000.010.010.010.010.010153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.937270 0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.9370 0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.937-270 0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.937-540 0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.93798.500MASS2.6E+4 2.9E+4 3.2E+4 3.5E+4 3.9E+4 4.3E+4 4.8E+4 5.3E+4 5.8E+4 6.3E+4 6.7E+4RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.005mg/L Displayed Model: No Degradation TCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation83.1(Kg) - Plume Mass If Biotransformation/Production 3.9(Kg) Mass Removed 79.2(Kg)% Biotransformed =+95.3%% Change in Mass Rate = -160.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.501.001.502.000153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.145270 0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.1450 0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.145-270 0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.145-540 0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.14598.500MASS1.5E+4 1.7E+4 1.9E+4 2.1E+4 2.3E+4 2.6E+4 2.8E+4 3.1E+4 3.4E+4 3.7E+4 4.0E+4RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.070mg/L Displayed Model: No Degradation DCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation49.1(Kg) - Plume Mass If Biotransformation/Production 10.4(Kg) Mass Removed 38.7(Kg)% Biotransformed =+78.7%% Change in Mass Rate = -160.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.200.400.600.801.001.200153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.217 0.241 0.267 0.296 0.328 0.363 0.400 0.439 0.480 0.522 0.564270 0.217 0.241 0.267 0.296 0.328 0.363 0.400 0.439 0.480 0.522 0.5640 0.217 0.241 0.267 0.296 0.328 0.363 0.400 0.439 0.480 0.522 0.564-270 0.217 0.241 0.267 0.296 0.328 0.363 0.400 0.439 0.480 0.522 0.564-540 0.217 0.241 0.267 0.296 0.328 0.363 0.400 0.439 0.480 0.522 0.56498.500MASS7.5E+3 8.4E+3 9.3E+3 1.0E+4 1.1E+4 1.3E+4 1.4E+4 1.5E+4 1.7E+4 1.8E+4 2.0E+4RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.002mg/L Displayed Model: No Degradation VCPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation24.2(Kg) - Plume Mass If Biotransformation/Production 5.9(Kg) Mass Removed 18.3(Kg)% Biotransformed =+75.5%% Change in Mass Rate = -160.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.100.200.300.400.500.600153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.004 0.005 0.005 0.006 0.006 0.007 0.007 0.008 0.009 0.010 0.011270 0.004 0.005 0.005 0.006 0.006 0.007 0.007 0.008 0.009 0.010 0.0110 0.004 0.005 0.005 0.006 0.006 0.007 0.007 0.008 0.009 0.010 0.011-270 0.004 0.005 0.005 0.006 0.006 0.007 0.007 0.008 0.009 0.010 0.011-540 0.004 0.005 0.005 0.006 0.006 0.007 0.007 0.008 0.009 0.010 0.01198.500MASS1.4E+2 1.6E+2 1.7E+2 1.9E+2 2.1E+2 2.4E+2 2.6E+2 2.9E+2 3.1E+2 3.4E+2 3.7E+2RATEDisplayed Compound(mg/day)Time:10 yr Target Level: mg/L Displayed Model: No Degradation ETHPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation0.5(Kg) - Plume Mass If Biotransformation/Production 36.9(Kg) Mass Removed -36.5(Kg)% Biotransformed =-8042.2 %% Change in Mass Rate = -160.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.000.000.010.010.010.010153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
BIOCHLOR Natural Attenuation Decision Support SystemHalifax CountyData Input Instructions:Version 2.2Downgradient Plume115 1. Enter value directly....orExcel 2000Run Name 2. Calculate by filling in gray TYPE OF CHLORINATED SOLVENT:Ethenes5. GENERAL 0.02 cells. Press Enter, then Ethanes Simulation Time* 10 (yr)(To restore formulas, hit "Restore Formulas" button )1. ADVECTIONModeled Area Width* 1350 (ft) Variable* Data used directly in model. Seepage Velocity* Vs 66.6(ft/yr)Modeled Area Length* 150 (ft) Test iforZone 1 Length* 150 (ft) BiotransformationHydraulic Conductivity K 3.785E-04(cm/sec)Zone 2 Length* 0 (ft) is OccurringHydraulic Gradient i 0.034(ft/ft)Effective Porosity n 0.2(-)6. SOURCE DATA TYPE: Decaying2. DISPERSION Single PlanarAlpha x* 15 (ft)(Alpha y) / (Alpha x)* 0.1 (-) Source Thickness in Sat. Zone* 25 (ft)(Alpha z) / (Alpha x)* 1.E-99 (-) Y13. ADSORPTION Width* (ft) 1350Retardation Factor* Rks*orConc. (mg/L)*C1(1/yr)Soil Bulk Density, rho 1.7 (kg/L) PCE 0.4 0.2FractionOrganicCarbon, foc1.0E-3(-) TCE 5.5 0.2 View of Plume Looking DownPartition Coefficient Koc DCE 3.25 0.2PCE 426 (L/kg) 4.62 (-) VC 1.6 0.2 Observed Centerline Conc. at Monitoring Wells TCE 130 (L/kg) 2.11 (-) ETH 0.03 0.2DCE 125 (L/kg) 2.06 (-) VC 30 (L/kg) 1.25 (-)7. FIELD DATA FOR COMPARISONETH 302 (L/kg) 3.57 (-) PCE Conc. (mg/L)0.0 0.4 1.1Common R (used in model)* = 2.11TCE Conc. (mg/L)0.0 1.2 2.24. BIOTRANSFORMATION-1st Order Decay Coefficient* DCE Conc. (mg/L)0.0 8.3 10.8Zone 1 (1/yr)half-life (yrs) YieldVC Conc. (mg/L)0.0 0.0 0.0PCE TCE0.5781.200.79ETH Conc. (mg/L)TCE DCE0.7700.900.74Distance from Source (ft)100 125 150DCE VC0.2103.300.64Date Data Collected2017VC ETH0.2672.600.458. CHOOSE TYPE OF OUTPUT TO SEE:Zone 2 (1/yr)half-life (yrs) PCE TCE0.000TCE DCE0.000DCE VC0.000VC ETH0.000Vertical Plane Source: Determine Source Well Location and Input Solvent ConcentrationsPaste Restore RUN CENTERLINE HelpNatural AttenuationLWorRUN ARRAYZone 2=CRESETSource OptionsSEE HELPCalc.
DISSOLVED CHLORINATED SOLVENT CONCENTRATIONS ALONG PLUME CENTERLINE (mg/L) at Z=0Distance from Source (ft)PCE0 15 30 45 60 75 90 105 120 135 150No Degradation0.054 0.060 0.067 0.074 0.082 0.091 0.100 0.110 0.120 0.130 0.141Biotransformation0.0541 0.052 0.051 0.049 0.047 0.046 0.044 0.042 0.041 0.039 0.038Monitoring Well Locations (ft)100 125 150Field Data from Site0.000 0.400 1.100Time:10.0 YearsReturn to InputSee PCESee TCESee DCETo All015304560901051201351500.0010.0100.1001.00010.0000 20 40 60 80 100 120 140 160Concentration (mg/L)Distance From Source (ft.)No Degradation/ProductionSequential 1st Order DecayField Data from SiteTo ArrayLog Linear Prepare AnimationSee VCSee ETH
DISSOLVED CHLORINATED SOLVENT CONCENTRATIONS ALONG PLUME CENTERLINE (mg/L) at Z=0Distance from Source (ft)TCE0 15 30 45 60 75 90 105 120 135 150No Degradation0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.937Biotransformation0.7443 0.697 0.652 0.610 0.571 0.535 0.501 0.469 0.439 0.411 0.384Monitoring Well Locations (ft)100 125 150Field Data from Site0.000 1.200 2.200Time:10.0 YearsReturn to InputSee PCESee TCESee DCETo All015304560901051201351500.0010.0100.1001.00010.0000 20 40 60 80 100 120 140 160Concentration (mg/L)Distance From Source (ft.)No Degradation/ProductionSequential 1st Order DecayField Data from SiteTo ArrayLog Linear Prepare AnimationSee VCSee ETH
DISSOLVED CHLORINATED SOLVENT CONCENTRATIONS ALONG PLUME CENTERLINE (mg/L) at Z=0Distance from Source (ft)DCE0 15 30 45 60 75 90 105 120 135 150No Degradation0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.145Biotransformation0.4398 0.555 0.670 0.785 0.899 1.013 1.125 1.236 1.343 1.446 1.541Monitoring Well Locations (ft)100 125 150Field Data from Site0.000 8.300 10.800Time:10.0 YearsReturn to InputSee PCESee TCESee DCETo All015304560901051201351500.0010.0100.1001.00010.000100.0000 20 40 60 80 100 120 140 160Concentration (mg/L)Distance From Source (ft.)No Degradation/ProductionSequential 1st Order DecayField Data from SiteTo ArrayLog Linear Prepare AnimationSee VCSee ETH
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.054 0.052 0.051 0.049 0.047 0.046 0.044 0.042 0.041 0.039 0.038270 0.054 0.052 0.051 0.049 0.047 0.046 0.044 0.042 0.041 0.039 0.0380 0.054 0.052 0.051 0.049 0.047 0.046 0.044 0.042 0.041 0.039 0.038-270 0.054 0.052 0.051 0.049 0.047 0.046 0.044 0.042 0.041 0.039 0.038-540 0.054 0.052 0.051 0.049 0.047 0.046 0.044 0.042 0.041 0.039 0.03898.500MASS1.9E+3 1.8E+3 1.8E+3 1.7E+3 1.6E+3 1.6E+3 1.5E+3 1.5E+3 1.4E+3 1.4E+3 1.3E+3RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.005mg/L Displayed Model: Biotransformation PCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation6.0(Kg) - Plume Mass If Biotransformation/Production 2.9(Kg) Mass Removed 3.2(Kg)% Biotransformed =+52.5%% Change in Mass Rate = 30.0 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.010.020.030.040.050.060153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.744 0.697 0.652 0.610 0.571 0.535 0.501 0.469 0.439 0.411 0.384270 0.744 0.697 0.652 0.610 0.571 0.535 0.501 0.469 0.439 0.411 0.3840 0.744 0.697 0.652 0.610 0.571 0.535 0.501 0.469 0.439 0.411 0.384-270 0.744 0.697 0.652 0.610 0.571 0.535 0.501 0.469 0.439 0.411 0.384-540 0.744 0.697 0.652 0.610 0.571 0.535 0.501 0.469 0.439 0.411 0.38498.500MASS2.6E+4 2.4E+4 2.3E+4 2.1E+4 2.0E+4 1.9E+4 1.7E+4 1.6E+4 1.5E+4 1.4E+4 1.3E+4RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.005mg/L Displayed Model: Biotransformation TCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation83.1(Kg) - Plume Mass If Biotransformation/Production 34.0(Kg) Mass Removed 49.1(Kg)% Biotransformed =+59.1%% Change in Mass Rate = 48.4 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.100.200.300.400.500.600.700.800153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.440 0.555 0.670 0.785 0.899 1.013 1.125 1.236 1.343 1.446 1.541270 0.440 0.555 0.670 0.785 0.899 1.013 1.125 1.236 1.343 1.446 1.5410 0.440 0.555 0.670 0.785 0.899 1.013 1.125 1.236 1.343 1.446 1.541-270 0.440 0.555 0.670 0.785 0.899 1.013 1.125 1.236 1.343 1.446 1.541-540 0.440 0.555 0.670 0.785 0.899 1.013 1.125 1.236 1.343 1.446 1.54198.500MASS1.5E+4 1.9E+4 2.3E+4 2.7E+4 3.1E+4 3.5E+4 3.9E+4 4.3E+4 4.7E+4 5.0E+4 5.4E+4RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.070mg/L Displayed Model: Biotransformation DCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation49.1(Kg) - Plume Mass If Biotransformation/Production 65.3(Kg) Mass Removed -16.2(Kg)% Biotransformed =-33.1 %% Change in Mass Rate = -250.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.200.400.600.801.001.201.401.600153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.217 0.244 0.276 0.313 0.354 0.400 0.449 0.501 0.556 0.612 0.668270 0.217 0.244 0.276 0.313 0.354 0.400 0.449 0.501 0.556 0.612 0.6680 0.217 0.244 0.276 0.313 0.354 0.400 0.449 0.501 0.556 0.612 0.668-270 0.217 0.244 0.276 0.313 0.354 0.400 0.449 0.501 0.556 0.612 0.668-540 0.217 0.244 0.276 0.313 0.354 0.400 0.449 0.501 0.556 0.612 0.66898.500MASS7.5E+3 8.5E+3 9.6E+3 1.1E+4 1.2E+4 1.4E+4 1.6E+4 1.7E+4 1.9E+4 2.1E+4 2.3E+4RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.002mg/L Displayed Model: Biotransformation VCPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation24.2(Kg) - Plume Mass If Biotransformation/Production 27.0(Kg) Mass Removed -2.9(Kg)% Biotransformed =-11.8 %% Change in Mass Rate = -208.5 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.100.200.300.400.500.600.700153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.004 0.013 0.024 0.037 0.052 0.070 0.091 0.115 0.141 0.169 0.198270 0.004 0.013 0.024 0.037 0.052 0.070 0.091 0.115 0.141 0.169 0.1980 0.004 0.013 0.024 0.037 0.052 0.070 0.091 0.115 0.141 0.169 0.198-270 0.004 0.013 0.024 0.037 0.052 0.070 0.091 0.115 0.141 0.169 0.198-540 0.004 0.013 0.024 0.037 0.052 0.070 0.091 0.115 0.141 0.169 0.19898.500MASS1.4E+2 4.5E+2 8.2E+2 1.3E+3 1.8E+3 2.4E+3 3.2E+3 4.0E+3 4.9E+3 5.9E+3 6.9E+3RATEDisplayed Compound(mg/day)Time:10 yr Target Level: mg/L Displayed Model: Biotransformation ETHPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation0.5(Kg) - Plume Mass If Biotransformation/Production 5.5(Kg) Mass Removed -5.0(Kg)% Biotransformed =-1112.0 %% Change in Mass Rate = -4787.9 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.050.100.150.200153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.054 0.060 0.067 0.074 0.082 0.091 0.100 0.110 0.120 0.130 0.141270 0.054 0.060 0.067 0.074 0.082 0.091 0.100 0.110 0.120 0.130 0.1410 0.054 0.060 0.067 0.074 0.082 0.091 0.100 0.110 0.120 0.130 0.141-270 0.054 0.060 0.067 0.074 0.082 0.091 0.100 0.110 0.120 0.130 0.141-540 0.054 0.060 0.067 0.074 0.082 0.091 0.100 0.110 0.120 0.130 0.14198.500MASS1.9E+3 2.1E+3 2.3E+3 2.6E+3 2.9E+3 3.2E+3 3.5E+3 3.8E+3 4.2E+3 4.5E+3 4.9E+3RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.005mg/L Displayed Model: No Degradation PCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation6.0(Kg) - Plume Mass If Biotransformation/Production 2.9(Kg) Mass Removed 3.2(Kg)% Biotransformed =+52.5%% Change in Mass Rate = -160.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.020.040.060.080.100.120.140.160153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.937270 0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.9370 0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.937-270 0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.937-540 0.744 0.827 0.918 1.019 1.128 1.247 1.375 1.510 1.650 1.794 1.93798.500MASS2.6E+4 2.9E+4 3.2E+4 3.5E+4 3.9E+4 4.3E+4 4.8E+4 5.3E+4 5.8E+4 6.3E+4 6.7E+4RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.005mg/L Displayed Model: No Degradation TCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation83.1(Kg) - Plume Mass If Biotransformation/Production 34.0(Kg) Mass Removed 49.1(Kg)% Biotransformed =+59.1%% Change in Mass Rate = -160.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.501.001.502.000153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.145270 0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.1450 0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.145-270 0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.145-540 0.440 0.489 0.543 0.602 0.667 0.737 0.812 0.892 0.975 1.060 1.14598.500MASS1.5E+4 1.7E+4 1.9E+4 2.1E+4 2.3E+4 2.6E+4 2.8E+4 3.1E+4 3.4E+4 3.7E+4 4.0E+4RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.070mg/L Displayed Model: No Degradation DCEPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation49.1(Kg) - Plume Mass If Biotransformation/Production 65.3(Kg) Mass Removed -16.2(Kg)% Biotransformed =-33.1 %% Change in Mass Rate = -160.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.200.400.600.801.001.200153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.217 0.241 0.267 0.296 0.328 0.363 0.400 0.439 0.480 0.522 0.564270 0.217 0.241 0.267 0.296 0.328 0.363 0.400 0.439 0.480 0.522 0.5640 0.217 0.241 0.267 0.296 0.328 0.363 0.400 0.439 0.480 0.522 0.564-270 0.217 0.241 0.267 0.296 0.328 0.363 0.400 0.439 0.480 0.522 0.564-540 0.217 0.241 0.267 0.296 0.328 0.363 0.400 0.439 0.480 0.522 0.56498.500MASS7.5E+3 8.4E+3 9.3E+3 1.0E+4 1.1E+4 1.3E+4 1.4E+4 1.5E+4 1.7E+4 1.8E+4 2.0E+4RATEDisplayed Compound(mg/day)Time:10 yr Target Level: 0.002mg/L Displayed Model: No Degradation VCPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation24.2(Kg) - Plume Mass If Biotransformation/Production 27.0(Kg) Mass Removed -2.9(Kg)% Biotransformed =-11.8 %% Change in Mass Rate = -160.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.100.200.300.400.500.600153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft
Start HerePCEDISSOLVED SOLVENT CONCENTRATIONS IN PLUMETCETransverse DCEDistance (ft) Distance from Source (ft) VC0 15 30 45 60 75 90 105 120 135 150ETH540 0.004 0.005 0.005 0.006 0.006 0.007 0.007 0.008 0.009 0.010 0.011270 0.004 0.005 0.005 0.006 0.006 0.007 0.007 0.008 0.009 0.010 0.0110 0.004 0.005 0.005 0.006 0.006 0.007 0.007 0.008 0.009 0.010 0.011-270 0.004 0.005 0.005 0.006 0.006 0.007 0.007 0.008 0.009 0.010 0.011-540 0.004 0.005 0.005 0.006 0.006 0.007 0.007 0.008 0.009 0.010 0.01198.500MASS1.4E+2 1.6E+2 1.7E+2 1.9E+2 2.1E+2 2.4E+2 2.6E+2 2.9E+2 3.1E+2 3.4E+2 3.7E+2RATEDisplayed Compound(mg/day)Time:10 yr Target Level: mg/L Displayed Model: No Degradation ETHPlume Mass (Order-of-Magnitude Accuracy) Plume Mass If No Degradation0.5(Kg) - Plume Mass If Biotransformation/Production 5.5(Kg) Mass Removed -5.0(Kg)% Biotransformed =-1112.0 %% Change in Mass Rate = -160.3 % Current Volume of Ground Water in PlumeCan't Calc.MGal Flow Rate of Water Through Source Area0.009MGD Pumping Rate(gpm)# Pore Volumes Removed Per Yr.# Pore Volumes to Clean-Up Clean-Up Time(yr)Return to InputPlot All DataPlot Data > TargetMass HELPSee GallonShow No Show To CenterlineIf "Can't Calc.", make model area longer5400.000001-5400.000.000.000.010.010.010.010153045607590105120135150ft.Concentration (mg/L)Distance from Source (ft.)Compare to Pump and Treat(source to edge)See acre-ft