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HomeMy WebLinkAboutWS-4526_14691_CA_RPTS_20240724_CAPR CORRECTION ACTION PERFORMANCE REPORT Davie County Law Enforcement Center- #14691 Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A PREPARED FOR: County of Davie 298 East Depot Street Mocksville, North Carolina 28555 PREPARED BY: S&ME, Inc. 8646 West Market Street, Suite 105 Greensboro, North Carolina 27409 July 24, 2024 S&ME, Inc. | 8646 West Market Street, Suite 105 | Greensboro, NC 27409 | p 336.288.7180 | www.smeinc.com July 24, 2024 County of Davie 298 East Depot Street Mocksville, North Carolina 27028 Attention: Mr. Brad Blackwelder Reference: Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A Dear Mr. Blackwelder: This report summarizes S&ME, Inc.’s (S&ME’s) active remediation system monitoring services at Davie County Law Enforcement Center from the period August 2023 to June 2024. The report describes the remediation system sample collection and includes a summary of the remediation system operation and inspections for the report period. If you have any questions, then please call (336)-288-7180 at your convenience. Sincerely, S&ME, Inc. Wayne H. Watterson, P.E. Edmund Q.B. Henriques, L.G. Principal Engineer Principal Geologist/Project Manager Lyndal Butler Project Professional Copy: NCDEQ-Division of Waste Management UST Section Attention: Ms. Linda Estkowski 450 W. Hanes Mill Road #300 Winston-Salem, North Carolina 27105 Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 ii Table of Contents 1.0 Site Information ................................................................................................................ 1 1.1 Site Identification ............................................................................................................................................... 1 1.2 Information About Contacts Associated with the Leaking UST System ................................................... 1 Information About Release ................................................................................................................................ 1 2.0 Executive Summary .......................................................................................................... 2 2.1 Free Product ........................................................................................................................................................ 2 2.2 Estimated Contaminant Mass .......................................................................................................................... 2 2.3 Maximum Concentrations and Extent of Dissolved Groundwater Contamination ................................. 2 2.4 Maximum Contaminant Concentrations in Soil ............................................................................................ 2 2.5 Remedial Action Plan ........................................................................................................................................ 2 2.6 Relative Effectiveness of Selected Technology ............................................................................................... 3 2.7 Receptors at Imminent Risk of Impact ............................................................................................................ 3 3.0 Site History and Characterization ................................................................................. 3 3.1 UST Owner and Operator Information ........................................................................................................... 3 3.2 UST Information ................................................................................................................................................. 3 3.3 Non-UST Information........................................................................................................................................ 3 3.4 Description of Release ....................................................................................................................................... 4 3.5 Site Characteristics ............................................................................................................................................. 4 3.6 Site Geology and Hydrogeology ...................................................................................................................... 4 3.7 Owner and Occupants of Property Within or Adjacent to Contamination ............................................... 5 3.8 Information on Receptors/Potential Receptors .............................................................................................. 5 3.9 CAP Implementation ......................................................................................................................................... 6 3.10 Progress of Remediation ................................................................................................................................... 7 4.0 Free Product Removal ...................................................................................................... 7 4.1 Treated Water Effluent Discharges .................................................................................................................. 8 4.1.1 Discharge Permit Information .......................................................................................................... 8 4.1.2 Treatment System Sampling ............................................................................................................. 8 Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 iii 5.0 System Performance ......................................................................................................... 8 5.1 Operations and Maintenance Activities .......................................................................................................... 9 5.2 Total Gallons of Free Project Recovered ......................................................................................................... 9 5.3 Operations and Maintenance Costs ............................................................................................................... 10 6.0 Soil Remediation ............................................................................................................. 10 7.0 Groundwater Remediation ........................................................................................... 10 8.0 Conclusions and Recommendations ........................................................................... 10 List of Figures Figure 1 – Vicinity Map Figure 2 – Site Map Figure 3 – Free Product Thickness Map Figure 4 – Groundwater Contour Map List of Tables Table 1 - Site History - UST/AST Owner Information Table 2 - Site History - UST/AST System Table 3 - Adjoining Property Owners/Occupants Table 4 - Well Construction Data Table 5 - Monitoring Well Liquid Level Data Table 6 - Recovery Well Liquid Level Data Table 7 - Free Product Volume Estimation Table 8 - Summary of Effluent Analytical Results & System Flow Data Table 9 - Summary of Free Product Recovery and Groundwater Recovery Appendices Appendix I – Historic Cross-Sections Appendix II – Fluid Level Measurements Appendix III - Lab Reports for Effluent Samples Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 1 1.0 Site Information 1.1 Site Identification • Date of Report July 24, 2024 • Facility I.D. #: 00-0-0000028202 UST Incident #: 14691 UST No.: WS-4526 • Site Risk/Priority Rank: H 165 D • Site Name Davie County Law Enforcement Center • Street Address 140 South Main Street • City/Town Mocksville, Davie County, 27028 • Description of Geographical Data Point: Former UST Location • Location Method Google Earth • Latitude: 80.5614 Degrees N Longitude: -35.8939 Degrees W 1.2 Information About Contacts Associated with the Leaking UST System • UST Owner/Operator: Davie County 298 East Depot Street Mocksville, North Carolina 27028 Phone: 336-751-5256 • Property Owner/Occupant: Same as above • Consultant/Contractor: S&ME, Inc. Attention: Edmund Q.B. Henriques 8646 West Market Street, Suite 105 Greensboro, North Carolina 27409 Phone: 336-288-7180 • Analytical Laboratories: Pace Analytical 9800 Kincey Avenue, Suite 100, Huntersville, N.C. 28078 Phone: 704-875-9092 Information About Release • Date Release Confirmed: August 15. 1995 • Estimated Quantity of Release: Unknown • Cause and Source of Release: Leak from Underground Storage Tank system • Sizes and Contents of Tanks from Which Release Occurred: One 6,000-gallon heating oil UST, two 2,000- gallon heating oil USTs, one 500-gallon heating oil UST. • Date of Free Product Measurements: May 17, 2024 Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 2 2.0 Executive Summary For the period of September 2023 through June 2024, the following summary is presented. 2.1 Free Product The greatest free phase liquid product (free product), or liquid non-aqueous phase liquid (LNAPL), thicknesses recorded on the site were 9.32 feet in monitor well MW-9 during March 2003, 8.34 feet in MW-7 during July 2000 and 6.59 feet in MW-4 during March 1995. On May 17, 2023, free product was present in monitoring wells MW-7, MW-8 and MW-9, at thicknesses ranging from 0.07 feet to 2.03 feet, and in recovery wells RW-1 and RW-3, at thicknesses of 0.02 feet and 0.16 feet, respectively. 2.2 Estimated Contaminant Mass The estimated contaminant mass baseline for free product ranged from approximately 750,000 pounds in 1997 to approximately 770,000 pounds in 1998. From August 16, 2023, to May 17, 2024, the estimated in-situ volume of free product appears to decrease from approximately 4,500 gallons (approximately 33,200 pounds) to approximately, 2,600 gallons (19,200 pounds). 2.3 Maximum Concentrations and Extent of Dissolved Groundwater Contamination The most recent analysis of groundwater samples for volatile organic compounds and semivolatile organic compounds performed during November 2016, for monitor wells not currently containing free product, did not detect target analytes. The dissolved constituent plume was generally defined upgradient of the free product plume by monitor well MW-5, and downgradient of the free product plume by monitor wells MW-1, MW-10, MW- 11, MW-12 and MW-13. 2.4 Maximum Contaminant Concentrations in Soil The maximum contaminant concentrations in soil, in the unsaturated zone, reported during assessment activities performed during 1995 were 2,430 milligrams per kilogram (mg/kg) for total petroleum hydrocarbons (TPH) as gasoline range organics, and 55,300 mg/kg for TPH as diesel range organics, in a soil sample collected from beneath Tank B, as summarized in historic cross-section figures provided in Appendix I. 2.5 Remedial Action Plan S&ME prepared the Corrective Action Plan (CAP) dated July 26, 1999. As stated in this CAP, the proposed remedial actions will attempt to restore groundwater quality “to the level of the standard, or as close thereto as is economically and technologically feasible.” Because of the high quantity of free product at the site, the site “poses an imminent danger to public health, public safety, or the environment” and was classified as High Risk. A groundwater pump and treatment system is employed to remove free product and to reduce the risk of petroleum hydrocarbon impacts to the nearby Leonard Creek, which is also the NPDES discharge point for the subject remediation system. Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 3 Once free product is removed, the site risk-classification can be reduced to Low-Risk. At that time, the dissolved phase groundwater cleanup goal is estimated to be the NCDEQ Gross Contaminant Levels (GCLs). Based on historic analytical data, no GCL exceedances have been detected at a groundwater monitoring well that did not contain measurable free product. Thus, removal of free product remains the primary goal for site remediation. In accordance with the CAP, soil at the site will be remediated to the Residential risk classification for Maximum Soil Contaminant Concentrations. 2.6 Relative Effectiveness of Selected Technology The CAP stated that operation of the recovery wells was expected to continue until groundwater monitoring data indicates remediation was no longer required. Due to the volume of free product at the site and inherent challenges associated with product recovery, it was not possible to accurately calculate the time frame required to attain the relevant final clean-up standards. 2.7 Receptors at Imminent Risk of Impact A municipal water supply is available in this area. No drinking water well receptors are known to be at risk of the release. A well survey conducted by Davie County representatives reported no water supply wells are within 1,500 feet of the site. A permanently flowing creek (Leonard Creek) is located along the southeastern portion of the site. Sources familiar with the history of the site have indicated that the creek once originated as a spring in the area below where monitoring well MW-1 is now located. The area has since been covered with four to five feet of fill, and the creek now flows from underneath the fill in the southeastern portion of the site. 3.0 Site History and Characterization The Davie County Law Enforcement Center is located at 140 South Main Street in Mocksville, North Carolina (Figure 1). The location of the UST site, USTs, and site structures are depicted on Figure 2. 3.1 UST Owner and Operator Information The owner/operator of these tanks is The County of Davie. Owner/operator information regarding the UST systems at the site is summarized in Table 1. 3.2 UST Information Former UST systems at the site include two 2,000-gallon heating oil USTs. Two heating oil USTs are currently in operation. Information regarding these USTs is summarized in Table 2. 3.3 Non-UST Information S&ME is not aware of above ground storage of petroleum products on the subject property. Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 4 3.4 Description of Release In 1994, surface-stained soil was discovered east of the Davie Law Enforcement Center building during a Phase I Environmental Site Assessment performed by Davie County personnel. At the time of discovery, the stained area was believed to be the result of a surface spill. To evaluate potential on-site sources for the release, the underground storage tanks (USTs) were assessed. As reported in S&ME’s Site Assessment Report dated October 1995, evaluation of each on-site UST included soil boring assessments of each UST basin and tank tightness testing for each UST (line tightness testing not conducted). In addition, tank removal and closure assessment services were completed for two of the four USTs. Tank tightness testing performed on February 7, 1995, indicated that three of the four USTs passed tank tightness tests, with Tank 1 failing the test procedure. On August 3, 1995, Tank 1 and Tank 2 were permanently closed by removal. Analytical results for closure soil samples confirmed a release along the southern end of Tank 2. S&ME was not aware of any additional UST or AST release incidents associated with the subject site. As summarized in S&ME’s Site Assessment Report dated October 1995, seven shallow monitoring wells (MW-1 through MW-5, MW-7, MW-8), one vertical extent monitoring well (MW-6D), 15 temporary Geoprobe™ monitoring points (P-1 through P-15), and 22 hollow-stem auger soil borings (B-1 through B-22) were used in an evaluation of the soil and groundwater impacts at the site. The extent of free product and dissolved phase petroleum hydrocarbons were estimated. The thickness of free product was gauged to be approximately six feet in monitoring well MW-4 located along the south end of the courthouse. Prior to development of the Corrective Action Plan (CAP), initial abatement measures included construction of an interceptor trench and sump adjacent to the stained area for the recovery of free product. 3.5 Site Characteristics The west and central portions of the site are developed with several institutional-use buildings and associated pavement systems, including, but not limited to the Davie County Courthouse, the Davie County Law Enforcement Center, and other county offices. The eastern portion of the property is open, undeveloped land. The property is in the central business district of Mocksville and surrounding land use is primarily commercial. The ground surface topography on the property generally slopes to the east southeast and ranges from elevations of approximately 860 feet mean sea level (MSL) near the northwest corner of the property to approximately 800 feet MSL near the southeast corner of the property. Partially weathered rock was encountered by soil boring P-13 at a depth of 48 feet below ground surface (ft-bgs) (Appendix I). Depth to water on the site ranges from approximately 3 to 10 ft-bgs in monitoring well MW-1 located downgradient of the free product plume, to 36 to 41 ft-bgs in monitoring well MW-5 located upgradient of the free product plume. Groundwater flows generally to the southeast to Leonard Creek located in the southeast portion of the site. 3.6 Site Geology and Hydrogeology The subject site is located in the western portion of the Charlotte Belt Hydrogeologic province in an area underlain by rock types identified on the 1985 Geologic Map of North Carolina as metamorphosed mafic rock and granitic Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 5 rock. Soils in this region are typically composed of residual weathering products of the underlying parent rock. A transition zone exists between the unweather bedrock and the overlying soil. This regolith is primarily saprolite derived from in-situ weathering of underlying bedrock. The thickness of saprolite can often vary considerably within a locale. • Shallow monitoring wells and recovery wells were generally extended to the depths of auger refusal, which typically occurred where partially weathered rock was encountered. • Groundwater at the site occurs in a shallow, unconfined aquifer within residual material and in fractures within underlying bedrock. Near surface groundwater flow generally mimics surface topography, with groundwater moving from topographic highs to topographic lows. In the studied area, shallow groundwater, not under the influence of pumping, would migrate from the UST release source area located near the Courthouse building, generally southeast toward Leonard Creek and the interceptor trench. Historic calculations indicated natural hydraulic gradients at the site ranged from 0.013 to 0.020 feet per foot. Slug test data from well MW-2 suggested a hydraulic conductivity value of 0.854 feet/day. Groundwater occurrence conditions observed on May 17, 2024, are shown on Figure 3, based on liquid level data collected approximately three weeks after the system was turned off. On May 17, 2024, depth to water measurements in the gauged monitor wells not containing free product ranged from 2.89 feet below top of casing (BTOC) in monitor well MW-1 to 35.31 BTOC in monitor well MW-5. Depth to water measurements in recovery wells not containing free product ranged from 18.53 feet BTOC in recovery well RW-8 to 27.00 feet BTOC in recovery well RW-1. • Groundwater flow on the site is generally from the northwest to the southeast. Residual influence of groundwater recovery can be observed in the areas around RW-1 and RW-5. • The liquid level measurements recorded during April 2021 generally indicate the highest historic groundwater occurrence elevations. • Appendix I contains multiple historic figures from the 1995 Site Assessment Report, including two cross- sections. As depicted in Cross-Sections A-A’ and B-B’ shallow groundwater occurs just above partially weathered rock. 3.7 Owner and Occupants of Property Within or Adjacent to Contamination Table 3 summarizes the subject parcel, adjoining and adjacent parcels to the subject property. A residence is located on a south adjacent property. Other properties are in use by Davie Country or are in commercial use. 3.8 Information on Receptors/Potential Receptors A municipal water supply is available in this area. No drinking water well receptors are known to be at risk of the release. Leonard Creek is located approximately 100 feet downgradient of monitor well MW-2 and recovery well RW-12. Free product was not observed in MW-2, but free product was observed at a thickness of 0.02 feet in RW-12 on September 14, 2020. Dissolved constituents were not detected in monitor wells located most proximal to Leonard Creek in 2016, including MW-1 and MW-13. Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 6 3.9 CAP Implementation During August 2002, S&ME installed nine additional recovery wells (RW-4 through RW-12) in accordance with the approved CAP. During August and September 2002, piping was installed to connect recovery well pumps to the groundwater treatment system. This involved installing vacuum piping, air-line, and discharge tubing from each of the existing and newly installed recovery wells to the equipment compound. In October and November 2002, the equipment subcontractor began fabricating the groundwater treatment system. S&ME began operation of the soil and groundwater system on February 26, 2003. The remediation system recovers and treats a mixture of contaminated groundwater and free product from twelve recovery wells (RW-1 through RW-12) and one interceptor trench (SUMP). The influent water from the total fluid recovery pumps is pumped into the discharge manifold located within the equipment compound. From the discharge manifold the water is pumped into the oil/water separator. After leaving the separator, the water is treated in an air stripper to remove dissolved hydrocarbon compounds. The treated water is filtered with 50-micron bag filters. The final treatment process is activated carbon, with treated water being discharged to Leonard Creek in accordance with an NPDES Permit. The remediation system also includes a vacuum system that can apply a vacuum to each of the recovery wells (i.e., vacuum enhancement). The application of a vacuum to the recovery wells can increase the recovery rate and overall capture zone of a given recovery well. The vacuum enhancement at each well provides soil vapor extraction (SVE) that can reduce the levels of volatile organic compounds in soil. S&ME began using vacuum enhancement on recovery wells RW-5, RW-6, RW-8, RW-11, and RW-12, on September 22, 2003. In-well separator pumps (Ferret Pumps) operated in recovery wells RW-2, RW-3, and RW-4 from startup in February 2003 until March 30, 2007. Over time, the effectiveness of the Ferret pumps to recover free product declined. On March 30, 2007, total fluids pumps replaced the Ferret pumps in recovery wells RW-2, RW-3, and RW-4. Based on the free product recovery report submitted for the subject incident during September 2008, and on the Active Remediation Monitoring Report submitted for the subject incident during February 2009, it was determined that the free product plume was not fully defined in the southerly direction relative to the suspected source area. Measurable free product was present in shallow groundwater monitoring wells MW-2, MW-8, and MW-9, and in free product recovery wells RW-4, RW-5, RW-11, and RW-12. Each of these wells is located on the Davie County Law Enforcement Center property. To delineate the horizontal extent of the free product plume beyond these wells, the NCDEQ approved the installation of up to six monitoring wells on adjoining properties located south of the subject property in the primary direction of groundwater flow. S&ME obtained Right of Access agreements from the property owners of two adjoining properties to install additional monitoring wells. On March 11 and 12, 2009, S&ME installed monitoring wells MW-10, MW-11, MW-12, and MW-13. Monitoring wells MW-12 and MW-13 were installed using hollow-stem auger drilling methods. Hollow-stem auger refusal was encountered at locations MW-10 and MW-11 prior to intercepting the uppermost water table aquifer; therefore, the boreholes were advanced into the upper-most prevalent aquifer using air hammer drilling methods. Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 7 Based on the persistent occurrence of free product in monitoring well MW-9, and on the minimal presence of free product in recovery wells RW-5 and RW-11, each located proximal to MW-9, the NCDEQ approved the installation of two monitoring wells to improve delineation of the horizontal extent of the free product plume near MW-9. On March 21, 2022, S&ME subcontractor Geologic Exploration, Inc., installed monitoring wells MW-14 and MW-15 using 4-1/4-inch diameter hollow-stem augers. Soil borings MW-14 and MW-15, performed to depths of 38.5 ft- bgs and 29.5 feet bgs, respectively, were converted to 2-inch diameter, PVC, Type II groundwater monitor wells. Well Construction details are summarized on Table 4. 3.10 Progress of Remediation The greatest free product occurrence was historically observed near source area monitor wells MW-4 and MW-7, at thicknesses exceeding 6 feet and 9 feet, respectively, and in downgradient monitoring wells MW-8 and MW-9, at thicknesses exceeding 8 feet and 7 feet, respectively. The free product plume extended from the source area to beyond downgradient monitor wells MW-1, MW-2, and MW-3. Following operation of the recovery system from 2003 until May 17, 2024, the free product occurrence observed in downgradient monitor wells has shown an overall decline in product thicknesses measured.. The horizontal distribution of the free product plume has been reduced and the free product plume is now defined by monitor wells MW-4, MW-5, MW-10, MW-11, MW-14, and MW-15, and by recovery wells RW-2, RW-4, RW-5 and RW-11. An isolated portion of the free product plume, represented by recovery well RW-3, is generally defined by monitor well MW-3 and by recovery wells RW-7 and RW-10. Fluid level measurements recorded on May 17, 2024, are provided in Appendix II. 4.0 Free Product Removal Prior to collecting depth to groundwater and depth to product measurements, S&ME shut down the recovery well pumps on April 24, 2024. On May 17, 2024, liquid level depth measurements were collected from groundwater monitoring wells MW-1 through MW-15, except for vertical extent monitoring well MW-6D. Well construction data is summarized in Table 4, and summaries of the most recent and historical liquid level data for onsite monitoring and recovery wells are provided in Table 5 and Table 6, respectively. Figure 4 depicts an estimated distribution and thickness measurements of free product. On May 17, 2024, free product was detected in monitor wells MW-7, MW-8, and MW-9, at thicknesses ranging from 0.07 feet in monitor well MW-7 to 2.03 feet in monitor well MW-9. When compared with the prior free product gauging event, free product thicknesses declined at MW-3 (not detected). When compared with the free product gauging event performed on August 16, 2023free product thickness decreases ranged from 0.01 feet to 0.41 feet were observed in monitoring wells MW-3, MW-7 and MW-9. On May 17, 2024, free product was detected in recovery wells RW-1 and RW-3 at thicknesses ranging from 0.02 feet in RW-1 to 0.16 feet in RW-11. When compared with the prior free product gauging event, free product thicknesses declined at RW-5 and RW-11 (not detected). Product thickness decreases ranging from 0.02 feet to 0.16 feet were observed in recovery well RW-1 and RW-3 S&ME estimated the mass of free product using the free product thickness measurements (and estimated extents of various thickness) collected on May 17, 2024, for comparison with estimated mass of free product using previous free product thickness measurements. The analysis is summarized in Table 7. Based on this analysis, it Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 8 would appear that the free product mass remaining in the unconfined aquifer had decreased by approximately 1,900 gallons, or 14,000 pounds (6,356 kilograms). This apparent decrease is subject to the inherent limitations and uncertainty associated with methods used to calculate an estimated volume of free product remaining in formation. In particular, the subject incident involves non-uniformly spaced monitoring wells and recovery wells, each representing a relatively large area. A substantive change in the apparent product thickness at one or more well(s), can have a substantial impact on the free product area calculation. For this site, recovered product volume data have been a better and more reliable indicator of product removal success. 4.1 Treated Water Effluent Discharges The remediation system recovers and treats a mixture of contaminated groundwater and free product from 12 recovery wells (RW-1 through RW-12) and one interceptor trench (SUMP). As noted in Section 5.0, not all of the recovery wells were operated during the reporting period. The influent water from the total fluid recovery pumps is pumped to the equipment compound and into the oil/water separator. After leaving the separator, the water is treated in an air stripper to remove dissolved hydrocarbon compounds. The treated water is filtered with 50- micron bag filters. The final treatment process is activated carbon, with the treated water being discharged to Leonard Creek in accordance with an NPDES Permit. 4.1.1 Discharge Permit Information Special Discharge Permit No.: NPDES No. NCG510000 Expiration Date: September 30, 2025 Schedule: System sample: Quarterly effluent samples 4.1.2 Treatment System Sampling As required by the current NPDES Permit, effluent samples were collected quarterly during this reporting period. Samples were collected from the groundwater treatment system and analyzed for oil & grease, total phenol, naphthalene, and total suspended solids on August 19, 2023, December 12, 2023, January 10, 2024, and April 24, 2024. A summary of the effluent sampling results is presented in Table 8. Copies of the analytical reports for effluent sampling events completed during the monitoring period are included in Appendix II. 5.0 System Performance Based on the on-going successful recovery of free product and the associated long-term reduction of the horizontal extent of free product, it has been possible to shut off certain recovery wells. Operation of the sump associated with the interceptor trench ceased years ago. Pumping occurred from source area recovery well RW-1, and from RW-3, RW-5 and, RW-11 from August 2023 until January 2024. Pumping occurred from recovery wells RW-1, RW-5, and RW-11, from February 2024 until May 2024, and from RW-1, RW-11, and RW-12 during June 2024. Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 9 5.1 Operations and Maintenance Activities S&ME currently performs site inspections at a frequency of approximately every two weeks to monitor the progress of remediation at the site and to maintain the remediation equipment. In general, maintenance includes the following. • Manage and adjust the chlorinator in the batch tank of the oil/water separator in an attempt to control the bacterial growth within the oil/water separator, air stripper, and filtration system. • Inspect bio-film accumulations in oil/water separator and clean the vessel and media to reduce the accumulations, • Change and/or clean bag and particulate filters, • Back-wash the activated carbons vessels, • Inspect and if required, clean the air-stripper trays, • Change oil in the air-compressors and SVE blower, as required, • Other system operations items are maintained, repaired, or replaced as necessary to maintain operation of the system and system components. The system has now operated for approximately 21 years and processed millions of gallons of total fluids. Accordingly, many system components have experienced much wear. As the system ages system components require higher than normal service (air compressor, bag filter housings, oil/water separator coalescing media, etc.). Operational issues for the period included the following. • Replacement of a pneumatic control line during September 2023. • The SVE system operated during the monitoring period from August 2023 until April 24, 2024. • Backwashed carbon filters on each O&M visit from August 2023 until April 24, 2024. • The system was down on January 25, 2024, due to rupture of a pneumatic control line. • Air compressor line check valve and a spring for the automatic blow down were replaced on March 18, 2024. • The system was turned off on April 24, 2024, to prepare for measurement of free product thicknesses on the next site visit. The discharge line totalizing flow meter was inoperable on this date. • After collecting product occurrence measurements on May 17, 2024, the system was not restarted due to a potential leak. • On June 4, 2024, a replacement totalizing flow meter was installed, the air stripper transfer pump was cleaned (fouled with iron), and a damaged pneumatic control line was replaced. The air compressor motor failed sometime prior to the June 25, 2024 site visit. Mechanical issues did not compromise system performance, such that NPDES permit conditions were not met. S&ME is continuing a process of identifying and replacing components. 5.2 Total Gallons of Free Project Recovered For the reporting period from August 2023 to July 2024, approximately 79 gallons of free product were recovered and temporarily stored on site. In total, approximately 39,494 gallons of free product has been recovered at the site since initiation of the CAP approved groundwater remediation activities in February 2003. The free product Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 10 collected by the remediation system is pumped into an onsite storage tank. Table 9 provides a summary of free product recovered as liquid by the pumping system and gallons of water treated and discharged. 5.3 Operations and Maintenance Costs The cost to operate and maintain the system was approximately $24,635 for the reporting period. This equates to approximately $312 recovered gallon of free product. This includes costs for electrical power, system inspections, maintenance, effluent samples, laboratory analyses, utilities, replacement parts and reporting services. 6.0 Soil Remediation A vacuum is applied to recovery wells in order to enhance free product recovery and to perform soil vapor extraction. Soil sampling activities were not performed during the subject period. Soil monitoring is not essential to the removal of free product and the lowering of the site’s NCDEQ risk-rank to Low-Risk. The SVE system was turned off from April 24 to June 25, 2024. 7.0 Groundwater Remediation A remediation system was installed during August 2002, in accordance with the approved CAP. The remediation system was designed to recover and treat a mixture of contaminated groundwater and free product from twelve recovery wells (RW-1 through RW-12) and one interceptor trench (SUMP). The influent water from the total fluid recovery pumps is pumped into the discharge manifold located within the equipment compound. From the discharge manifold the water is pumped into the oil/water separator. After leaving the separator, the water is treated in an air stripper to remove dissolved hydrocarbon compounds. The treated water is filtered with 50- micron bag filters. The final treatment process is activated carbon, with treated water being discharged to Leonard Creek in accordance with an NPDES Permit. The remediation system also includes a vacuum system that can apply a vacuum to each of the recovery wells (i.e., vacuum enhancement). The application of a vacuum to the recovery wells can increase the recovery rate and overall capture zone of a given recovery well. The vacuum enhancement at each well provides soil vapor extraction (SVE) that can reduce the levels of volatile organic compounds in soil. S&ME began using vacuum enhancement on recovery wells RW-5, RW-6, RW-8, RW-11, and RW-12, on September 22, 2003. At times, S&ME turns recovery well pumps on and/or off, as deemed appropriate to manage free-product recovery. The same protocol has applied to the operation of the SVE unit. No sampling of groundwater was conducted during the reporting period. 8.0 Conclusions and Recommendations Leonard Creek remains the primary receptor for this incident since the surrounding area is served by municipal water. S&ME recommends continuing operation of the groundwater pump and treat system. Free product exists in several of the on-site monitoring wells and recovery wells. The remediation system has been successful at reducing the thickness and horizontal extent of free product at this site. Corrective Action Performance Report, August 2023 – June 2024 Davie County Law Enforcement Center; Incident #14691; UST #: WS-4526 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project No. 1584-98-109A July 24, 2024 11 The historic horizontal extent of free product was estimated to encompass approximately 1.6 acres. The current horizontal extent of free product with a thickness greater than 0.01 feet was estimated to encompass less than 0.2 acre. The absence of measurable product since the installation of monitoring wells MW-14 and MW-15 demonstrates a diminished extent of product in the portion of the site located south and east of the Detectives Office building. The rate of product recovery with the existing recovery well network has decreased as the thickness of free product and the horizontal extent of product have diminished. The occurrence of product in monitor well MW-9, representing the portion of the site located between recovery wells RW-5 and RW-11, diminished to thicknesses less than 0.4 feet from August to October 2023, prior to rebounding to thicknesses greater than 2 feet from November 2023 to May 2024. Historically, similar fluctuations in product levels have been observed at monitoring well MW-9. Remediation system operations should continue, with total fluids pumping (e.g., groundwater and free-product) generally limited to recovery wells RW-1, RW-3, RW-5, and RW-11. SCALE: DATE: PROJECT NUMBER FIGURE NO. Dr a w i n g P a t h : Z:\ S h a r e d \ S M E \ O p s \ E N V \ P r o j e c t s \ 1 9 9 8 \ 1 0 9 A D a v i e C o . L a w E n f o r c e m e n t \ D a v i e C t y L E C - F i g 1 . d w g N 0 2000 4000 (IN FEET)GRAPHIC SCALE (IN FEET)GRAPHIC SCALE DAVIE COUNTY LAW ENFORCEMENT CENTER MOCKSVILLE, NORTH CAROLINA 1 1584-98-109A NOV. 2020 AS SHOWNVICINITY MAP SITE SOURCE: MOCKSVILLE, NC QUADRANGLE, 7.5-MINUTE SERIES US TOPO© (2019). AGRICULTURALEXTENSION BUILDING COURT HOUSE DETECTIVES OFFICE SUMPWATER STREET EXT. SO U T H M A I N S T R E E T REMEDIATION SYSTEM COMPOUND(CONTAINS AIR COMPRESSOR AND COMPRESSED AIRMANIFOLD) REMEDIATION SYSTEM BUILDING(ALL BLOWERS, AIR STRIPPER, OIL/WATER SEPARATOR, FILTRATION SYSTEM, DISCHARGE MANIFOLDS AND CHEMICAL FEED) FORMER UST LOCATION STONE FIELD EXCAVATION INTERCEPTOR TRENCH !G !G !G !G !G !G !G !G !G !G !G !G @A @A @A @A @A @A @A @A @A @A @A @A @A @A @A 850 840 830 820 81 0810 848 84 6 84 4 842 83 8 836 834 832 82 8 82 6 824 822 81 2814816 818 442 3 1 ■□JB ■□JB ■□JB RW-1 RW-2 RW-3 RW-4 RW-5 RW-6 RW-7 RW-8 RW-9 RW-10 RW-11 RW-12 MW-3 MW-4 MW-5 MW-6D MW-7 MW-8 MW-9 MW-10 MW-11 MW-12 MW-13 MW-14 MW-15 MW-1 MW-2 FIGURE NO. SCALE: DATE: PROJECT NUMBER ³ Dr a w i n g P a t h : T : \ G r e e n s b o r o - 1 5 8 0 \ P r o j e c t s \ 1 9 9 8 \ 1 5 8 4 - 9 8 - 1 0 9 A D a v i e C o . L a w E n f o r c e m e n t \ G I S \ d a v i e c o u n t y f i g u r e s \ p l o t t e d b y L a u r e n S l a k t e r JULY 2024 1" = 40' 1584-98-109A Note:THIS MAP IS FOR INFORMATIONAL PURPOSES ONLY. ALL FEATURE LOCATIONS DISPLAYEDARE APPROXIMATED. THEY ARE NOT BASED ON CIVIL SURVEY INFORMATION, UNLESS STATED OTHERWISE.2 DA V I E C O U N T Y L A W E N F O R C E M E N T C E N T E R 14 0 S O U T H M A I N S T R E E T MO C K S V I L L E , N O R T H C A R O L I N A SI T E M A P In c i d e n t N o . 1 4 6 9 1 0 40 80 (FEET) @A MONITORING WELLS !G RECOVERY WELLS■□JB JUNCTION BOX FORMER UNDERGROUND STORAGE TANK LOCATION (UST) 1 UST IDENTIFICATION AGRICULTURAL EXTENSIONBUILDING COURT HOUSE DETECTIVES OFFICE SUMPWATER STREET EXT. SO U T H M A I N S T R E E T REMEDIATION SYSTEM COMPOUND (CONTAINS AIR COMPRESSOR AND COMPRESSED AIR MANIFOLD) REMEDIATION SYSTEM BUILDING(ALL BLOWERS, AIR STRIPPER, OIL/WATER SEPARATOR,FILTRATION SYSTEM, DISCHARGE MANIFOLDS ANDCHEMICAL FEED) FORMER UST LOCATION STONE FIELD EXCAVATION INTERCEPTOR TRENCH !G !G !G !G !G !G !G !G !G !G !G !G @A @A @A @A @A @A @A @A @A @A @A @A @A @A @A 850 840 830 82 0 810810 84 8 846 844 842 838 83 6 834 832 828 826 824 822 812814 81 6 818 442 3 1 ■□JB ■□JB ■□JB 0.0 1.0 0.0 0.0 RW-1(0.02) RW-2 (0.00) RW-3 (0.16) RW-4 (0.00)RW-5 (0.00) RW-6 (0.00) RW-7 (0.00) RW-8 (0.00) RW-9 (0.00) RW-10 (0.00) RW-11 (0.00) RW-12(0.00) MW-3 (0.00) MW-4(0.00) MW-5(0.00) MW-6D (NM) MW-7(0.07) MW-8(0.19) MW-9(2.03) MW-10(0.00) MW-11 (0.00)MW-12 (0.00)MW-13(0.00) MW-14(0.00) MW-15 (0.00) MW-1 (0.00) MW-2 (0.00) FIGURE NO. SCALE: DATE: PROJECT NUMBER ³ Dr a w i n g P a t h : T : \ G r e e n s b o r o - 1 5 8 0 \ P r o j e c t s \ 1 9 9 8 \ 1 5 8 4 - 9 8 - 1 0 9 A D a v i e C o . L a w E n f o r c e m e n t \ G I S \ d a v i e c o u n t y f i g u r e s \ p l o t t e d b y L a u r e n S l a k t e r JULY 2024 1" = 40' 1584-98-109A Note:THIS MAP IS FOR INFORMATIONAL PURPOSES ONLY. ALL FEATURE LOCATIONS DISPLAYEDARE APPROXIMATED. THEY ARE NOT BASED ON CIVIL SURVEY INFORMATION, UNLESS STATED OTHERWISE.3 DA V I E C O U N T Y L A W E N F O R C E M E N T C E N T E R 14 0 S O U T H M A I N S T R E E T MO C K S V I L L E , N O R T H C A R O L I N A FR E E P R O D U C T T H I C K N E S S M A P (M A Y 1 7 , 2 0 2 4 ) In c i d e n t N o . 1 4 6 9 1 0 40 80 (FEET) @A MONITORING WELLS !G RECOVERY WELLS■□JB JUNCTION BOX FORMER UNDERGROUND STORAGE TANK (UST) LOCATION 1 UST IDENTIFICATION FREE PRODUCT-ESTIMATED HORIZONTAL EXTENT (0.19)FREE PRODUCT THICKNESS MEASURED IN FEET (NM) NOT MEASURED AGRICULTURALEXTENSION BUILDING COURT HOUSE DETECTIVES OFFICE SUMPWATER STREET EXT. SO U T H M A I N S T R E E T REMEDIATION SYSTEM COMPOUND (CONTAINS AIR COMPRESSOR AND COMPRESSED AIR MANIFOLD) REMEDIATION SYSTEM BUILDING (ALL BLOWERS, AIR STRIPPER, OIL/WATER SEPARATOR, FILTRATION SYSTEM, DISCHARGE MANIFOLDS AND CHEMICAL FEED) FORMER UST LOCATION STONE FIELD EXCAVATION INTERCEPTOR TRENCH !G !G !G !G !G !G !G !G !G !G !G !G 44 2 3 1 @A @A @A @A @A @A @A @A @A @A @A @A @A @A @A■□JB ■□JB ■□JB 807 . 5 810 812 . 5 815817 . 5 820 82 2 . 5 825 82 7 . 5 83 0 . 0 83 2 . 5 RW-1 (829.80) RW-2 (829.42) RW-3 (827.42) RW-4 (830.52)RW-5(826.85) RW-6 (823.84) RW-7 (825.57) RW-8 (822.40) RW-9(822.80) RW-10(822.96) RW-11(819.58) RW-12 (816.51) MW-3(827.15) MW-4 (830.39) MW-5 (833.15) MW-6D (NM) MW-7 (829.75) MW-8 (829.21) MW-9 (823.36) MW-10 (828.28) MW-11 (816.64)MW-12 (812.28) MW-13 (807.28) MW-14 (829.97) MW-15(822.88) MW-1 (820.50) MW-2 (818.56) FIGURE NO. SCALE: DATE: PROJECT NUMBER ³ Dr a w i n g P a t h : T : \ G r e e n s b o r o - 1 5 8 0 \ P r o j e c t s \ 1 9 9 8 \ 1 5 8 4 - 9 8 - 1 0 9 A D a v i e C o . L a w E n f o r c e m e n t \ G I S \ d a v i e c o u n t y f i g u r e s \ p l o t t e d b y L a u r e n S l a k t e r JULY 2024 1" = 40' 1584-98-109ANote: THIS MAP IS FOR INFORMATIONAL PURPOSES ONLY. ALL FEATURE LOCATIONS DISPLAYEDARE APPROXIMATED. THEY ARE NOT BASED ON CIVIL SURVEY INFORMATION, UNLESSSTATED OTHERWISE. -MONITORING WELL MW-6D DATA WAS NOT USED SINCE THE WELL SCREEN IS BELOWTHE TOP OF THE WATER TABLE.CONTOUR INTERVAL = 2.5 FEET 4 DA V I E C O U N T Y L A W E N F O R C E M E N T C E N T E R 14 0 S O U T H M A I N S T R E E T MO C K S V I L L E , N O R T H C A R O L I N A GR O U N D W A T E R C O N T O U R M A P (M A Y 1 7 , 2 0 2 4 ) In c i d e n t N o . 1 4 6 9 1 0 40 80 (FEET) @A MONITORING WELLS !G RECOVERY WELLS FORMER UNDERGROUND STORAGE TANK (UST) LOCATION 1 UST IDENTIFICATION ■□JB JUNCTION BOX GROUNDWATER ELEVATION CONTOUR (05/17/2024) (818.56)RELATIVE GROUNDWATER ELEVATION (NM) NOT MEASURED TABLE 1 SITE HISTORY - UST/AST OWNER INFORMATION Davie County Law Enforcement Center 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project # 1584-98-109A UST Facility ID # 0-00-0000028202 Revision Date: 05-23-2018 1, 2 Davie County Unknown to August 1995 14691 Owner/Operator 3, 4 Davie County Unknown to present ---Owner/Operator Address Telephone Number 285 East Depot Street, Mocksville, NC 27028 336-751-5256 UST/AST ID Number(s) Name of Owner or Operator Dates of Ownership / Operation Incident Number Owner or Operator? 285 East Depot Street, Mocksville, NC 27028 336-751-5256 UST/AST ID Number(s) Name of Owner or Operator Dates of Ownership / Operation Incident Number Owner or Operator? Address Telephone Number TABLE 2 SITE HISTORY - UST/AST SYSTEM INFORMATION Davie County Law Enforcement Center 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project # 1584-98-109A UST Facility ID # 0-00-0000028202 Revision Date: 05-23-2018 UST ID Number Current/Last Contents * Previous Contents * Capacity (gallons) Construction Details ** Description of Associated Piping and Pumps Date UST Installed (mm/dd/yy) Status of UST *** Was Release Associated With UST System? (Yes/No) 1 Heating Oil Unknown 2,000 Steel Unknown Unknown Permanently closed by removal; August 1985 Yes 2 Heating Oil Unknown 2,000 Steel Unknown Unknown Permanently closed by removal; August 1995 Yes 3 Heating Oil Unknown 6,000 Steel Unknown Unknown Currently operational No 4 Heating Oil Unknown 500 Steel Unknown Unknown Currently operational No AST ID Number Current/Last Contents * Previous Contents * Capacity (gallons) Construction Details ** Description of Associated Piping and Pumps Date UST Installed (mm/dd/yy) Status of AST *** Was Release Associated With AST System? (Yes/No)None ------------------------ UST Facility ID # 0-00-0000028202 Street/PO Box City State Zip Owner: Davie County Board of Commissioners 123 South Main Street Mocksville NC 27028 Occupant: Davie County Courthouse, Law Enforcement Center, County offices 140, 149, 180 South Main Street Mocksville NC 27028 Owner: Henry P. Van Hoy II, et.al.10 Court Square Mocksville NC 27028 Occupant: Commercial office 10 Court Square Mocksville NC 27028 Owner: County of Davie 123 South Main Street Mocksville NC 27028 Occupant: Undeveloped E. Depot Street; Lots 6-15 Moore & Cheek Mocksville NC 27028 Goodwin Cabinetry, LLC 146 Marajo Court Mocksville NC 27028 Occupant: Commercial 162 E. Depot Street Mocksville NC 27028 Owner: Juanita B. Parks 128 Parks Lane Mocksville NC 27028 Occupant: Vacant Chaffin Street; Lots 30/31 Moore & Cheek Mocksville NC 27028 Owner: County of Davie 123 South Main Street Mocksville NC 27028 Occupant: County of Davie 298 E. Depot Street; 261 Chaffin Street Mocksville NC 27028 Owner: County of Davie 123 South Main Street Mocksville NC 27028 Occupant: Undeveloped 1 Lot Lexington Street Mocksville NC 27028 Owner: Judy Taylor Link 7160 Old Mocksville Road Salisbury NC 28144 Occupant: Residence 124 E. Water Street Mocksville NC 27028 Owner: Mebane Charitable Foundation 232 South Main Street Mocksville NC 27028 Occupant: Office 232 South Main Street Mocksville NC 27028 Owner/Occupant AddressesOwner/Occupant NameParcel Identification Number 5738737771 5738735896 5738736898, 5738738818 5738739779 5738830289, 5738831750 5738739305 Property owner and address information obtained from Davie County GIS website; November 21, 2022; updated August 23, 2023. 5738737500 5738736441 5738739857 TABLE 3 Adjoining Property Owners/Occupants Davie County Law Enforcement Center, (Incident No.: 14691, UST #: WS-4526) 140 South Main Street, Mocksville, Davie County, North Carolina S&ME Project # 1584-98-109A TABLE 4 WELL CONSTRUCTION DATA DAVIE COUNTY LAW ENFORCEMENT CENTER MOCKSVILLE, NORTH CAROLINA S&ME PROJECT NO. 1584-98-109A Revision Date: 8/29/2023 Well ID MW-1 MW-2 MW-3 MW-4 MW-5 MW-6D MW-7 MW-8 Total Depth1 12.0 25.0 32.5 38.0 44.75 80.0 38 38 Screen Interval1 7.0 - 12.0 15.0 - 25.0 17.5 - 32.5 23.0 - 38.0 29.75 - 44.75 75.0 - 80.0 23 - 38 23 - 38 Top of Casing Elevation 823.39 837.97 850.35 858.72 868.46 854.72 856.68 850.25 Consultant S&ME S&ME S&ME S&ME S&ME S&ME S&ME S&ME Installation Date 1/28/1995 2/25/1995 2/24/1995 3/14/1995 3/18/1995 12/18/1995 12/8/1998 12/9/1998 Well ID MW-9 MW-10 MW-11 MW-12 MW-13 MW-14 MW-15 B-4 Total Depth1 36 34.5 29.1 33.6 25.4 38.5 29.1 24 Screen Interval1 15.5-35.10 14.5-34.1 14.1-28.7 13.6-33.2 10.5-25.1 18.3-38.3 8.9-28.9 14 - 24 Top of Casing Elevation 843.42 845.97 834.98 828.56 820.30 850.68 844.20 842.67 Consultant S&ME S&ME S&ME S&ME S&ME S&ME S&ME S&ME Installation Date 8/17/2002 3/12/2009 3/11/2009 3/11/2009 3/11/2009 3/22/2022 3/22/2022 2/23/1995 Well ID RW-1 RW-2 RW-3 RW-4 RW-5 RW-6 RW-7 RW-8 RW-9 RW-10 RW-11 RW-12 Total Depth1 37.5 37.65 32.70 49.50 48.75 40.60 46.35 35.00 40.00 41.70 38.80 36.00 Screen Interval1 22.5 - 37.5 22.55 - 36.95 18.30 - 32.70 14.45-43.95 13.70-43.20 16.55-35.05 16.30-40.80 15.00-30.00 15.00-35.00 16.70-36.70 18.30-32.80 15.85-30.35 Top of Casing Elevation 856.78 854.87 846.29 850.59 848.06 843.73 844.49 840.93 841.68 842.67 840.33 837.33 Consultant S&ME S&ME S&ME S&ME S&ME S&ME S&ME S&ME S&ME S&ME S&ME S&ME Installation Date 3/27/1997 10/29/1997 10/28/1997 8/12/2002 8/13/2002 8/12/2002 8/13/2002 8/15/2002 8/16/2002 8/16/2002 8/15/2002 8/14/2002 Notes: Measurements are displayed in feet 1Measured relative to ground surface DTW = Depth to water measured from top of casing in feet Recovery Wells Monitoring Wells Monitoring Wells Well ID Total Depth1 Screen Interval1 Top of Casing Elevation Consultant Installation Date Date DTW DTP PT GWE DTW DTP PT GWE DTW DTP PT GWE DTW DTP PT GWE DTW DTP PT GWE 3/16/1995 3.80 3.78 0.01 818.37 19.65 nd 0.00 818.32 25.21 nd 0.00 825.14 36.78 30.40 6.38 827.47 NI NI NI NI 3/22/1995 3.99 3.98 0.01 818.18 19.65 nd 0.00 818.32 25.12 nd 0.00 825.23 36.88 30.29 6.59 827.55 39.01 nd 0.00 829.45 12/20/1995 ------------------ 4/2/1996 8.33 7.68 0.65 814.39 20.18 nd 0.00 817.79 26.20 24.67 1.53 825.47 34.61 29.61 5.00 828.44 38.27 nd 0.00 830.19 8/28/1996 8.16 7.86 0.30 814.26 24.37 nd 0.00 813.60 27.99 26.06 1.93 824.03 35.52 30.25 5.27 827.76 38.59 nd 0.00 829.87 12/20/1996 7.93 7.71 0.22 814.42 21.92 nd 0.00 816.05 28.00 26.33 1.67 823.80 36.59 30.82 5.77 827.13 39.30 nd 0.00 829.16 3/26/1997 7.64 7.42 0.22 814.71 20.90 nd 0.00 817.07 26.69 25.74 0.95 824.48 35.36 30.49 4.87 827.58 39.05 nd 0.00 829.41 4/25/1997 ------------34.87 30.51 4.36 827.63 ---- 5/19/1997 --------26.05 25.59 0.46 824.70 34.44 30.28 4.16 827.88 ---- 6/23/1997 ------------34.08 30.14 3.94 828.05 ---- 7/21/1997 --------27.30 25.82 1.48 824.33 33.82 30.23 3.59 828.01 ---- 9/16/1997 --------27.94 26.00 1.94 824.09 34.21 30.40 3.81 827.81 ---- 10/22/1997 7.86 7.63 0.23 814.50 ----28.25 26.10 2.15 823.96 34.60 30.61 3.99 827.58 ---- 11/24/1997 --------28.36 26.08 2.28 823.96 35.20 30.85 4.35 827.29 ---- 12/15/1997 --------28.24 25.05 3.19 824.87 35.40 30.99 4.41 827.14 ---- 1/21/1998 --------26.80 25.80 1.00 824.42 35.02 31.01 4.01 827.17 ---- 3/9/1998 --------23.31 23.30 0.01 827.05 34.00 30.47 3.53 827.78 ---- 3/30/1998 --------25.15 nd 0.00 825.20 33.65 30.30 3.35 827.97 ---- 5/15/1998 7.57 7.40 0.17 814.74 20.93 nd 0.00 817.04 24.89 nd 0.00 825.46 33.02 29.92 3.10 828.38 35.17 nd 0.00 833.29 6/9/1998 7.36 7.12 0.24 815.01 ----25.07 nd 0.00 825.28 32.95 29.84 3.11 828.46 ---- 8/31/1998 7.73 7.56 0.17 814.58 ----26.92 25.75 1.17 824.44 33.25 31.12 2.13 827.31 ---- 11/10/1998 7.90 7.68 0.22 814.45 ----28.30 26.20 2.10 823.87 34.37 30.70 3.67 827.53 ---- 12/17/1998 -------------------- 1/13/1999 ------------35.20 31.20 4.00 826.98 ---- 5/24/1999 7.42 7.40 0.02 814.76 ----27.60 25.69 1.91 824.40 34.76 31.06 3.70 827.16 ---- 11/10/1999 7.53 7.50 0.03 814.66 22.75 nd 0.00 815.22 29.55 26.40 3.15 823.53 35.92 31.50 4.42 826.63 ---- 7/8/2000 7.95 7.93 0.02 814.23 >24.31 22.15 >2.16 815.53 30.02 26.67 3.35 823.23 36.66 31.80 4.86 826.27 ---- 1/22/2001 7.79 7.78 0.01 814.38 >24.31 22.37 >1.94 815.34 30.65 27.55 3.10 822.38 37.03 32.61 4.42 825.52 ---- 8/3/2001 7.99 7.97 0.02 814.19 >24.31 22.53 >1.78 815.20 30.84 27.77 3.07 822.17 37.28 32.70 4.58 825.41 ---- 1/4/2002 ---->24.31 23.11 >1.2 814.70 ------------ 7/3/2002 8.60 8.57 0.03 813.59 >24.31 23.13 >1.18 814.68 31.46 28.55 2.91 821.41 >37.65 33.44 >4.21 824.72 ---- 9/23/2002 --------31.64 28.82 2.82 821.15 >37.65 33.64 >4.01 824.54 ---- 2/12/2003 ----22.25 21.34 0.91 816.51 28.35 27.56 0.79 822.68 >37.65 32.68 >4.97 825.37 ---- 3/26/2003 8.09 8.07 0.02 814.09 22.56 21.44 1.12 816.38 27.53 nd 0.00 822.82 >37.65 32.46 5.19 825.56 ---- 4/29/2003 ----23.00 21.61 1.39 816.17 ----36.75 32.08 4.67 826.01 ---- 6/9/2003 -------------------- 7/22/2003 8.04 8.01 0.03 814.15 23.05 21.89 1.16 815.92 26.91 nd 0.00 823.44 34.62 31.19 3.43 827.07 ---- 8/18/2003 7.72 7.69 0.03 814.47 22.68 21.67 1.01 816.16 26.71 nd 0.00 823.64 34.09 30.95 3.14 827.35 38.88 nd 0.00 829.58 9/15/2003 8.91 8.90 0.01 813.26 >24.31 22.47 >1.84 815.25 27.08 nd 0.00 823.27 33.90 30.87 3.03 827.44 ---- 10/13/2003 ---->24.31 23.68 >0.63 814.21 27.33 27.32 0.01 823.03 33.93 31.07 2.86 827.27 ---- 11/10/2003 8.56 8.55 0.01 813.61 >24.31 23.37 >0.94 814.47 27.43 sheen sheen 822.92 34.10 31.28 2.82 827.06 38.76 nd 0.00 829.70 2/3/2004 9.60 9.57 0.03 812.59 >24.31 23.21 >1.1 814.61 28.55 27.96 0.59 822.31 35.30 31.94 3.36 826.33 39.39 sheen sheen 829.07 3/29/2004 10.25 10.24 0.01 811.92 >24.31 23.36 >0.95 814.48 29.25 28.24 1.01 821.97 35.92 32.44 3.48 825.81 39.83 nd 0.00 828.63 6/7/2004 10.35 10.31 0.04 811.84 24.26 23.55 0.71 814.32 29.55 28.42 1.13 821.78 35.85 32.62 3.23 825.67 40.05 nd 0.00 828.41 7/7/2004 10.73 10.70 0.03 811.46 >24.31 23.41 >0.9 814.44 30.02 28.53 1.49 821.62 35.95 32.65 3.30 825.63 40.11 nd 0.00 828.35 8/16/2004 9.31 nd 0.00 812.85 >24.31 23.51 >0.8 814.35 29.80 28.41 1.39 821.75 35.74 32.82 2.92 825.51 40.24 nd 0.00 828.22 8/30/2004 9.35 nd 0.00 812.81 ------------40.24 nd 0.00 828.22 10/12/2004 9.73 nd 0.00 812.43 >24.31 22.94 >1.37 814.85 29.52 28.31 1.21 821.88 35.31 32.71 2.60 825.66 40.23 nd 0.00 828.23 11/22/2004 9.21 nd 0.00 812.95 >24.31 22.90 >1.41 814.88 28.55 28.04 0.51 822.24 34.95 32.71 2.24 825.71 40.06 nd 0.00 828.40 12/21/2004 9.95 nd 0.00 813.44 >24.31 23.01 >1.3 814.79 29.11 28.31 0.8 821.93 34.80 32.74 2.06 825.70 ---- 2/26/2007 5.65 nd 0.00 817.74 24.02 22.27 1.75 815.47 28.31 27.86 0.45 822.43 33.35 33.15 0.20 825.54 ---- 1/28/2008 7.52 nd 0.00 815.87 nd 23.99 0.26 NM 31.36 29.05 2.31 820.99 35.26 34.18 1.08 824.40 41.28 nd 0.00 827.18 5/12/2008 6.49 nd 0.00 816.90 23.38 22.33 1.05 815.50 28.62 28.42 0.20 821.90 34.80 33.85 0.95 824.74 39.99 nd 0.00 828.47 5/5/2009 5.41 nd 0.00 817.98 22.08 21.55 0.53 816.35 27.55 27.51 0.04 822.83 33.69 33.39 0.30 825.29 39.15 nd 0.00 829.31 1/15/2011 ----21.91 21.05 0.86 816.80 26.19 nd 0.00 824.16 32.56 31.88 0.68 826.75 ---- 11/28/2011 6.94 nd 0.00 816.45 25.07 24.48 0.59 813.41 29.34 29.16 0.18 821.17 35.45 33.27 2.18 825.16 ---- 2/25/2013 4.78 nd 0.00 818.61 22.31 21.95 0.36 815.97 27.39 nd 0.00 822.96 34.68 33.39 1.29 825.16 ---- 2/20/2014 5.66 nd 0.00 817.73 21.25 21.17 0.08 816.79 27.33 nd 0.00 823.02 33.23 32.85 0.38 825.82 40.04 nd 0.00 828.42 2/20/2015 NF NF 0.00 NF 22.90 22.45 0.45 815.46 27.27 nd 0.00 823.08 33.15 31.15 0.00 825.57 40.24 40.24 0.00 828.22 9/18/2015 - - --24.02 23.41 0.61 814.48 - - --32.42 31.23 1.19 827.33 - - - - 1/21/2016 4.68 nd 0.00 818.71 20.60 20.55 0.05 817.41 26.31 nd 0.00 824.04 32.12 nd 0.00 826.60 39.33 nd 0.00 829.13 7/28/2016 4.33 nd 0.00 819.06 21.75 21.63 0.12 816.32 25.84 nd 0.00 824.51 31.61 nd 0.00 827.11 38.35 nd 0.00 830.11 12/19/2016 ----23.10 23.03 0.07 814.93 ----32.52 nd 0.00 826.20 ---- 10/18/2017 ----22.88 nd 0.00 815.09 27.18 nd 0.00 823.17 32.69 nd 0.00 826.03 ---- 5/18/2018 ----21.45 nd 0.00 816.52 26.43 nd 0.00 823.92 32.39 nd 0.00 826.33 ---- 4/2/2019 ----19.60 19.66 0.06 818.42 24.24 nd 0.00 826.11 29.91 nd 0.00 828.81 ---- 11/22/2019 ----21.20 nd 0.00 816.77 25.28 nd 0.00 825.07 30.06 nd 0.00 828.66 ---- 9/14/2020 ----20.26 nd 0.00 817.71 23.89 23.88 0.01 826.47 28.49 nd 0.00 830.23 ---- 4/16/2021 ----18.91 nd 0.00 819.06 22.81 nd 0.00 827.54 27.78 nd 0.00 830.94 ---- 10/6/2021 ----20.51 nd 0.00 817.46 23.82 23.81 0.01 826.54 -------- 11/7/2022 3.13 ND 0.00 820.26 20.91 nd 0.00 817.06 24.35 nd 0.00 826.00 29.71 nd 0.00 829.01 36.90 nd 0.00 831.56 8/16/2023 ----20.12 nd 0.00 817.85 23.97 23.96 0.01 826.39 28.72 nd 0.00 830.00 35.84 nd 0.00 832.62 11/15/2023 --------24.78 nd 0.00 825.57 --------5/17/2024 2.89 ND 0.00 820.50 19.41 nd 0.00 818.56 23.20 nd 0.00 827.15 28.33 nd 0.00 830.39 35.31 nd 0.00 833.15 Thickness Change2 No Free Product Since 4/2/19 -0.01 No Free Product Since 2015 Free Product not detected Revision Date: 5/22/2024 No Free Product Since 7/7/04 17.5 - 32.5 1/28/1995 2/24/1995 S&MES&MES&ME 3/18/19953/14/1995 S&ME 2/25/1995 S&ME TABLE 5MONITORING WELL LIQUID LEVEL DATA DAVIE COUNTY LAW ENFORCEMENT CENTERMOCKSVILLE, NORTH CAROLINA 7.0 - 12.0 823.39 MW-4 38.0 23.0 - 38.0 858.72 MW-2 MW-3 12.0 32.525.0 850.35 15.0 - 25.0 837.97 44.75 S&ME PROJECT NO. 1584-98-109A MW-1 MW-5 29.75 - 44.75 868.46 T:\Greensboro-1580\Projects\1998\1584-98-109A Davie Co. Law Enforcement\Remediation Monitoring Reports\Corrective Action Performance Report (2024 July)\Tables_2024 Mon Rpt_preliminary.xlsx Well ID Total Depth1 Screen Interval1 Top of Casing Elevation Consultant Installation DateDate DTW DTP PT GWE DTW DTP PT GWE DTW DTP PT GWE DTW DTP PT GWE DTW DTP PT GWE 3/16/1995 NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI ---- 3/22/1995 NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI 24.48 20.10 4.38 821.98 12/20/1995 27.23 nd 0.00 827.49 NI NI NI NI NI NI NI NI NI NI NI NI ---- 4/2/1996 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.77 22.58 2.19 819.808/28/1996 28.36 nd 0.00 826.36 NI NI NI NI NI NI NI NI NI NI NI NI 24.80 23.57 1.23 818.94 12/20/1996 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.87 23.46 1.41 819.02 3/26/1997 27.85 nd 0.00 826.87 NI NI NI NI NI NI NI NI NI NI NI NI 24.87 23.11 1.76 819.32 4/25/1997 ----NI NI NI NI NI NI NI NI NI NI NI NI ---- 5/19/1997 ----NI NI NI NI NI NI NI NI NI NI NI NI ----6/23/1997 ----NI NI NI NI NI NI NI NI NI NI NI NI ---- 7/21/1997 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.90 23.28 1.62 819.17 9/16/1997 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.93 23.35 1.58 819.11 10/22/1997 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.94 23.41 1.53 819.05 11/24/1997 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.94 23.16 1.78 819.27 12/15/1997 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.95 23.33 1.62 819.12 1/21/1998 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.92 23.09 1.83 819.33 3/9/1998 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.93 22.77 2.16 819.61 3/30/1998 ----NI NI NI NI NI NI NI NI NI NI NI NI 22.84 20.93 1.91 821.48 5/15/1998 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.77 22.68 2.09 819.71 6/9/1998 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.82 22.82 2.00 819.58 8/31/1998 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.83 23.12 1.71 819.32 11/10/1998 ----NI NI NI NI NI NI NI NI NI NI NI NI 24.82 23.43 1.39 819.05 12/17/1998 ----43.66 36.36 7.30 819.34 34.85 29.12 5.73 820.36 NI NI NI NI ---- 1/13/1999 28.71 nd 0.00 826.01 36.77 29.24 7.53 826.43 30.28 23.24 7.04 826.07 NI NI NI NI ---- 5/24/1999 ----36.25 29.06 7.19 826.66 29.46 23.20 6.26 826.21 NI NI NI NI 24.82 23.03 1.79 819.40 11/10/1999 ----37.68 29.46 8.22 826.12 31.03 23.46 7.57 825.78 NI NI NI NI 24.84 23.50 1.34 818.99 7/8/2000 29.25 nd 0.00 825.47 38.16 29.82 8.34 825.74 31.11 24.05 7.06 825.25 NI NI NI NI ---- 1/22/2001 ---->38.38 30.61 >7.77 825.03 32.90 24.80 8.10 824.36 NI NI NI NI 8/3/2001 ---->38.38 30.69 >7.69 824.96 32.55 24.90 7.65 824.32 NI NI NI NI 1/4/2002 ------------NI NI NI NI 7/3/2002 30.85 nd 0.00 823.87 >38.38 31.53 >6.85 824.23 33.84 25.73 8.11 823.43 NI NI NI NI 9/23/2002 ---->38.38 31.78 >6.6 824.02 33.95 25.96 7.99 823.22 ---- 2/12/2003 ---->38.38 30.77 >7.61 824.89 31.24 25.00 6.24 824.41 25.34 21.75 3.59 821.19 3/26/2003 ---->38.38 30.64 >7.74 825.00 31.92 25.38 6.54 823.99 33.08 23.76 9.32 818.41 4/29/2003 ----37.97 30.42 7.55 825.25 31.69 25.28 6.41 824.11 33.73 24.58 9.15 817.61 6/9/2003 29.84 nd 0.00 824.88 ------------ 7/22/2003 ----35.59 29.57 6.02 826.30 29.18 24.18 5.00 825.40 30.38 24.75 5.63 817.92 8/18/2003 39.21 nd 0.00 815.51 35.36 29.34 6.02 826.53 28.07 23.98 4.09 825.72 29.63 24.52 5.11 818.22 9/15/2003 ----35.22 29.31 5.91 826.58 28.16 24.05 4.11 825.65 ---- 9/22/2003 ------------32.54 25.06 7.48 817.36 10/13/2003 ----35.42 29.51 5.91 826.38 28.46 24.51 3.95 825.21 32.27 26.64 5.63 816.03 11/10/2003 31.56 nd 0.00 823.16 35.51 29.67 5.84 826.23 28.99 24.41 4.58 825.23 32.96 26.05 6.91 816.44 2/3/2004 30.39 nd 0.00 824.33 36.37 30.25 6.12 825.61 30.38 24.91 5.47 824.61 31.86 25.99 5.87 816.64 3/29/2004 32.16 nd 0.00 822.56 37.93 30.81 7.12 824.92 31.73 25.34 6.39 824.05 32.74 26.71 6.03 815.90 6/7/2004 ----38.18 30.82 7.36 824.87 31.47 25.25 6.22 824.17 31.15 25.98 5.17 816.75 7/7/2004 ----38.40 30.86 7.54 824.81 31.57 25.25 6.32 824.15 31.04 25.95 5.09 816.79 8/16/2004 31.41 nd 0.00 823.31 38.30 30.98 7.32 824.72 31.30 25.35 5.95 824.10 30.71 25.96 4.75 816.82 8/30/2004 31.03 nd 0.00 823.69 ------------ 10/12/2004 30.61 nd 0.00 824.11 38.15 30.82 7.33 824.88 30.94 25.12 5.82 824.35 30.55 25.67 4.88 817.10 11/22/2004 30.16 nd 0.00 824.56 37.41 30.85 6.56 824.95 30.14 25.15 4.99 824.43 30.32 25.36 4.96 817.40 12/21/2004 ----37.12 30.91 6.21 824.94 30.59 25.18 5.41 824.35 30.28 25.52 4.76 817.26 2/26/2007 29.91 nd 0.00 824.81 36.14 31.12 5.02 824.89 29.50 25.06 4.44 824.60 26.09 24.12 1.97 819.04 1/28/2008 31.41 nd 0.00 823.31 38.40 32.08 6.32 823.75 26.31 nd 0.00 823.94 32.30 25.69 6.61 816.84 5/12/2008 31.29 nd 0.00 823.43 37.74 31.71 6.03 824.16 30.66 25.65 5.01 823.93 27.25 24.35 2.90 818.68 5/5/2009 30.12 nd 0.00 824.60 35.61 31.45 4.16 824.67 27.48 25.08 2.40 824.85 25.10 24.06 1.04 819.22 1/15/2011 28.45 nd 0.00 826.27 31.70 30.27 1.43 826.22 24.46 24.29 0.17 825.94 23.91 22.33 1.58 820.88 11/28/2011 29.51 nd 0.00 825.21 35.90 34.95 0.95 821.60 27.80 27.20 0.60 822.97 26.86 25.40 1.46 817.82 2/25/2013 30.08 nd 0.00 824.64 34.21 31.62 2.59 824.71 26.20 22.79 3.41 820.17 2/19/2014 - - --33.05 31.27 1.78 825.17 25.40 23.11 2.29 820.00 2/20/2015 - - --32.70 31.50 1.20 825.02 27.40 25.45 1.95 824.54 26.15 22.90 3.25 820.08 9/18/2015 - - --32.87 32.86 0.01 823.82 26.73 25.32 1.41 824.74 27.88 23.41 4.47 819.41 1/21/2016 28.98 nd 0.00 825.74 31.08 30.64 0.44 825.98 25.48 24.73 0.75 825.42 25.82 22.29 3.53 820.66 7/28/2016 28.34 nd 0.00 826.38 30.19 30.03 0.16 826.63 24.52 nd 0.00 825.73 25.02 21.64 3.38 821.33 12/19/2016 ----31.80 30.89 0.91 825.67 25.43 25.16 0.27 825.05 25.90 22.73 3.17 820.27 10/18/2017 ----31.73 31.04 0.69 825.55 26.11 25.44 0.67 824.72 26.03 22.69 3.34 820.28 5/18/2018 ----31.32 30.79 0.53 825.82 25.40 24.90 0.50 825.28 25.90 22.45 3.45 820.51 4/2/2019 27.52 nd 0.00 827.20 28.55 28.47 0.08 828.20 23.04 22.78 0.26 827.44 24.44 20.88 3.56 822.06 11/22/2019 ----28.72 28.66 0.06 828.01 22.91 22.68 0.23 827.54 24.46 21.02 3.44 821.94 9/14/2020 ----27.30 27.16 0.14 829.50 21.39 21.15 0.24 829.07 22.78 19.40 3.38 823.57 4/16/2021 ----26.48 26.43 0.05 830.24 20.79 20.55 0.24 829.67 21.90 19.08 2.82 823.96 10/6/2021 ----26.93 26.83 0.10 829.84 21.03 20.78 0.25 829.44 21.95 19.32 2.63 823.75 11/7/2022 ----28.29 28.19 0.10 828.48 22.47 22.30 0.17 827.93 23.01 20.55 2.46 822.54 8/16/2023 27.48 27.33 0.15 829.33 21.51 21.30 0.21 828.92 19.66 19.59 0.07 823.82 9/21/2023 --------20.38 20.07 0.31 823.31 10/6/2023 ------------21.41 21.04 0.37 822.33 11/15/2023 ------------24.11 21.70 2.41 821.40 2/23/2024 ------------23.14 20.70 2.44 822.395/17/2024 ----26.99 26.92 0.07 829.75 21.20 21.01 0.19 829.21 21.82 19.79 2.03 823.36 Thickness Change2 Deep Well 'Not Assessed -0.08 -0.02 1.96 Not Assessed 14 - 24 filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment S&ME S&ME S&ME S&ME 15.5-35.10 S&ME PROJECT NO. 1584-98-109A 856.68 850.25 843.42 842.67 filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment S&ME 12/18/1995 12/8/1998 filled in with sediment filled in with sediment 12/9/1998 8/17/2002 filled in with sediment filled in with sediment filled in with sediment filled in with sediment 2/23/1995 filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment 38 MW-9 MONITORING WELL LIQUID LEVEL DATA DAVIE COUNTY LAW ENFORCEMENT CENTERMOCKSVILLE, NORTH CAROLINA 24 TABLE 5 (CONTINUED) 36 B-4 854.72 MW-6D MW-7 MW-8 80.0 38 75.0 - 80.0 23 - 38 23 - 38 filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled with sediment filled in with sediment filled with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment filled in with sediment T:\Greensboro-1580\Projects\1998\1584-98-109A Davie Co. Law Enforcement\Remediation Monitoring Reports\Corrective Action Performance Report (2024 July)\Tables_2024 Mon Rpt_preliminary.xlsx Well ID Total Depth1 Screen Interval1Top of Casing Elevation Consultant Installation Date Date DTW DTP PT GWE DTW DTP PT GWE DTW DTP PT GWE DTW DTP PT GWE 4/6/2009 23.58 nd 0.00 822.39 21.14 nd 0.00 813.84 17.07 nd 0.00 811.49 14.01 nd 0.00 806.29 5/5/2009 23.19 nd 0.00 822.78 21.41 nd 0.00 813.57 17.53 nd 0.00 811.03 14.47 nd 0.00 805.83 1/15/2011 21.21 nd 0.00 824.76 22.12 nd 0.00 812.86 18.23 nd 0.00 810.33 15.02 nd 0.00 805.28 11/28/2011 26.61 nd 0.00 819.36 22.71 nd 0.00 812.27 18.95 nd 0.00 809.61 15.77 nd 0.00 804.53 2/25/2013 23.42 nd 0.00 822.55 22.61 nd 0.00 812.37 18.7 nd 0.00 809.86 15.88 nd 0.00 804.422/19/2014 22.12 nd 0.00 823.85 20.79 nd 0.00 814.19 17.18 nd 0.00 811.38 13.99 nd 0.00 806.31 2/20/2015 22.9 nd 0.00 823.07 22.49 nd 0.00 812.49 18.67 nd 0.00 809.89 15.26 nd 0.00 805.04 9/18/2015 - - - - - - - - - - - - - - - - 1/21/2016 21.82 nd 0.00 824.15 19.98 nd 0.00 815.00 16.42 nd 0.00 812.14 13.71 nd 0.00 806.59 7/28/2016 21.91 nd 0.00 824.06 21.73 nd 0.00 813.25 17.14 nd 0.00 811.42 14.15 nd 0.00 806.1512/19/2016 - - - - - - - - - - - - - - - - 10/18/2017 - - - - - - - - - - - - - - - - 5/18/2018 22.52 nd 0.00 823.45 22.53 nd 0.00 812.45 17.81 nd 0.00 810.75 13.95 nd 0.00 802.49 4/2/2019 19.62 nd 0.00 826.35 19.07 nd 0.00 815.91 15.61 nd 0.00 812.95 nd 0.00 804.69 11/22/2019 - - - - - - - - - - - - - - - - 9/14/2020 17.62 nd 0.00 828.35 20.29 nd 0.00 814.69 16.90 nd 0.00 811.66 13.15 nd 0.00 807.15 4/16/2021 -nd 0.00 --nd 0.00 --nd 0.00 --nd 0.00 - 10/6/2021 ---------------- 11/7/2022 19.43 nd 0.00 826.54 21.79 nd 0.00 813.19 18.57 nd 0.00 809.99 15.10 nd 0.00 805.20 8/16/2023 17.93 nd 0.00 828.04 20.62 nd 0.00 814.36 17.41 nd 0.00 811.15 13.90 nd 0.00 806.405/17/2024 17.69 nd 0.00 828.28 18.34 nd 0.00 816.64 16.28 nd 0.00 812.28 13.02 nd 0.00 807.28 Thickness Change2 No Free Product No Free Product No Free Product No Free Product Well ID Total Depth1 Screen Interval1 Top of Casing Elevation Consultant Installation Date Date DTW DTP PT GWE DTW DTP PT GWE 3/30/2022 22.12 nd 0.00 828.56 22.72 nd 0.00 821.48 5/24/2022 21.95 nd 0.00 828.73 22.59 nd 0.00 821.61 11/17/2022 22.01 nd 0.00 828.67 21.99 nd 0.00 822.21 8/16/2023 20.99 nd 0.00 829.69 21.22 nd 0.00 822.98 5/17/2024 20.71 nd 0.00 829.97 21.32 nd 0.00 822.88 Thickness Change2 No Free Product No Free Product Notes: Measurements are displayed in feet 1Measured relative to ground surface Thickness Change2 = Change in Free Product Thickness when compared with prior event. Negative values are declines, positive values are increases. DTW = Depth to water measured from top of casing in feet DTP = Depth to free product measured from top of casing in feet PT = Free product thickness in feet GWE = Corrected groundwater elevation = TOC Elevation - (DTW - Product Thickness * Specific Weight of Product) Specific Weight of Product estimated to be 0.866 NI = Recovery well was not installed at the date of measurement nd = Free product not detected - = No data / well not gauged Groundwater Elevation (GWE) corrected for free product by factoring the specific gravity of diesel fuel above the static water column TABLE 5 (CONTINUED)MONITORING WELL LIQUID LEVEL DATADAVIE COUNTY LAW ENFORCEMENT CENTERMOCKSVILLE, NORTH CAROLINAS&ME PROJECT NO. 1584-98-109A MW-10 MW-11 MW-12 MW-13 3/12/2009 3/11/2009 3/11/2009 3/11/2009 S&ME S&ME S&ME S&ME 845.97 834.98 828.56 820.30 S&ME S&ME 3/21/2022 3/21/2022 38.3 28.9 18.3-38.3 8.9-28.9 850.68 844.20 MW-14 MW-15 14.5-34.1 14.1-28.7 13.6-33.2 10.5-25.1 34.5 29.1 33.6 25.4 T:\Greensboro-1580\Projects\1998\1584-98-109A Davie Co. Law Enforcement\Remediation Monitoring Reports\Corrective Action Performance Report (2024 July)\Tables_2024 Mon Rpt_preliminary.xlsx TABLE 6RECOVERY WELL LIQUID LEVEL DATADAVIE COUNTY LAW ENFORCEMENT CENTERMOCKSVILLE, NORTH CAROLINAS&ME PROJECT NO. 1584-98-109A Revision Date: 5/22/2024 Well ID Total Depth1 Screen Interval1 Top of Casing Consultant Installation Date Date DTW GWE DTP PT DTW GWE DTP PT DTW GWE DTP PT DTW GWE DTP PT 4/25/1997 35.31 826.96 28.97 6.34 - ---- ---NI NI NI 5/19/1997 - ---35.29 825.30 28.68 6.61 ---NI NI NI 6/23/1997 35.00 827.33 28.59 6.41 ------NI NI NI 7/21/1997 34.66 827.30 28.68 5.98 ------NI NI NI 9/16/1997 35.19 827.12 28.81 6.38 ------NI NI NI 10/22/1997 35.67 826.89 29.00 6.67 ------NI NI NI 11/24/1997 36.30 826.60 29.23 7.07 35.85 826.27 27.48 8.37 23.94 823.93 22.12 1.82 NI NI NI 12/15/1997 36.40 826.57 29.25 7.15 36.33 826.25 27.43 8.90 23.64 824.16 21.90 1.74 NI NI NI 1/21/1998 36.06 826.60 29.27 6.79 35.69 826.33 27.43 8.26 23.14 824.33 21.78 1.36 NI NI NI 3/9/1998 35.16 827.23 28.68 6.48 34.33 826.93 26.95 7.38 22.95 824.99 21.04 1.91 NI NI NI 3/30/1998 34.70 827.39 28.57 6.13 33.72 827.04 26.92 6.80 24.94 823.18 22.83 2.11 NI NI NI 5/15/1998 33.87 827.80 28.22 5.65 32.62 827.46 26.60 6.02 22.30 825.41 20.66 1.64 NI NI NI 6/9/1998 33.70 827.83 28.22 5.48 32.47 827.50 26.58 5.89 22.62 825.25 20.80 1.82 NI NI NI 8/31/1998 34.10 827.44 28.60 5.50 33.70 827.08 26.88 6.82 25.65 824.43 21.27 4.38 NI NI NI 11/10/1998 35.40 826.84 29.10 6.30 35.30 826.54 27.25 8.05 26.35 823.95 21.72 4.63 NI NI NI 12/17/1998 42.92 819.76 36.11 6.81 ------NI NI NI 1/13/1999 36.16 826.34 29.55 6.61 36.45 826.08 27.60 8.85 NI NI NI 5/24/1999 35.81 826.58 29.33 6.48 35.65 826.32 27.45 8.20 26.17 824.47 21.15 5.02 NI NI NI 11/10/1999 37.19 826.01 29.78 7.41 36.65 825.82 27.87 8.78 28.01 823.63 21.83 6.18 NI NI NI 7/8/2000 37.38 825.70 30.10 7.28 - ---28.31 823.38 22.08 6.23 NI NI NI 1/22/2001 38.68 824.86 30.87 7.81 36.70 824.86 28.97 7.73 29.37 822.48 22.95 6.42 NI NI NI 8/3/2001 37.69 824.91 30.97 6.72 36.70 824.81 29.03 7.67 NI NI NI 1/4/2002 ---- ---- ---NI NI NI 7/3/2002 37.69 824.29 31.68 6.01 36.63 824.15 29.81 6.82 28.34 821.80 23.89 4.45 NI NI NI 9/23/2002 37.40 824.42 31.58 5.82 36.44 824.14 29.85 6.59 30.14 821.70 23.73 6.41 32.85 823.78 25.87 6.98 10/5/2002 - ---36.40 824.19 29.80 6.6 30.00 821.75 23.70 6.30 33.00 823.83 25.80 7.20 2/12/2003 >37.7 -30.77 >6.93 3/26/2003 - --- 12/22/2003 36.01 826.02 29.95 6.06 - ---- ---- --- 2/3/2004 36.82 825.68 30.21 6.61 - ---- ---- --- 7/7/2004 - ---- ---- ---- --- 5/3/2007 - -31.70 N/A 31.20 824.09 30.72 0.48 24.45 822.07 24.18 0.27 27.32 824.63 25.75 1.57 5/12/2008 *- -31.82 >5.68 - -30.41 >7.24 25.80 -23.69 2.11 28.42 824.43 25.81 2.61 5/5/2009 - -31.54 >5.96 23.38 823.21 23.03 0.35 1/15/2011 31.42 826.44 30.17 1.25 29.07 825.89 28.97 0.10 21.63 824.69 21.59 0.04 24.11 826.51 24.08 0.03 11/28/2011 33.30 823.58 33.18 0.12 32.75 824.54 29.96 2.79 24.92 821.69 24.55 0.37 27.62 823.37 27.16 0.46 2/25/2013**nd - -1.13 30.60 824.40 30.45 0.15 23.45 823.49 22.70 0.75 26.35 824.89 25.60 0.75 2/20/2014 32.80 825.41 31.15 1.65 31.01 823.86 nd 0.00 23.13 823.16 nd 0.00 25.80 825.40 25.10 0.70 2/20/2015 *31.05 826.08 30.65 0.40 30.50 824.67 30.15 0.35 23.15 823.53 22.70 0.45 25.85 824.98 25.57 0.28 1/21/2016*31.64 826.08 30.55 1.09 29.19 825.83 29.02 0.17 22.04 824.26 22.03 0.01 24.50 826.10 24.49 0.01 7/28/2016*30.26 826.58 30.19 0.07 28.63 826.26 28.61 0.02 21.23 825.06 nd 0.00 24.05 815.20 nd 0.00 12/19/2016**31.24 825.77 30.98 0.26 29.80 825.45 29.36 0.44 22.61 823.79 22.48 0.13 24.74 825.85 nd 0.00 10/18/2017*31.55 825.49 31.25 0.30 29.70 825.17 nd 0.00 22.70 823.72 22.55 0.15 25.15 825.48 25.10 0.05 5/18/2018*31.20 825.80 30.95 0.25 Dry Dry dry 0.00 22.00 824.42 21.85 0.15 24.74 825.85 nd 0.00 4/2/2019*30.95 828.30 28.10 2.85 26.90 827.99 26.88 0.02 20.15 826.16 20.13 0.02 22.55 828.04 nd 0.00 11/22/2019 28.93 828.12 28.62 0.31 27.22 827.65 nd 0.00 21.05 825.53 20.72 0.33 22.51 828.08 nd 0.00 9/14/2020 27.19 829.67 27.10 0.09 25.73 829.14 nd 0.00 19.60 826.75 19.53 0.07 21.03 829.56 nd 0.00 4/16/2021 26.60 830.29 26.47 0.13 25.02 829.85 nd 0.00 18.43 827.86 nd 0.00 20.25 830.34 nd 0.00 10/6/2021 27.01 829.89 26.87 0.14 25.38 829.49 nd 0.00 19.21 827.10 19.19 0.02 20.78 829.81 nd 0.00 11/7/2022 28.32 828.49 28.29 0.03 26.73 828.14 nd 0.00 20.17 826.25 20.02 0.15 22.16 828.43 nd 0.00 8/16/2023**27.46 829.36 27.41 0.05 25.86 829.01 nd 0.00 19.90 826.72 19.52 0.38 21.13 829.46 nd 0.00 5/17/2024**27.00 829.80 26.98 0.02 25.45 829.42 nd 0.00 19.01 827.42 18.85 0.16 20.07 830.52 nd 0.00 Thickness Change -0.03 -0.22 No Free Product Since 2017 Notes: Measurements are displayed in feet NI = Recovery well was not installed at the date of measurement 1Measured relative to ground surface PT = Free product thickness in feet DTW = Depth to water measured from top of casing in feet DTP = Depth to free product measured from top of casing in feet nd = Free product not detected - = No data * = Measurements were collected after a complete shut down of the system for approximately 2 weeks. ** = Measurements were collected after a complete shut down of the recovery well pumps for approximately 5 weeks. Groundwater Elevation (GWE) corrected for free product by factoring the specific gravity of diesel fuel above the static water column RW-4 37.5 49.50 RW-2 RW-3RW-1 37.65 32.70 14.45-43.9518.30 - 32.70 product below pump product below pump 10/28/199710/29/1997 22.55 - 36.9522.5 - 37.5 850.59 product below pump product below pump 854.87 S&ME S&ME 8/12/2002 vault filled with water product below pump product below pump product below pump 846.29 S&ME 856.78 S&ME 3/27/1997 product below pump No Free Product Since 2019 T:\Greensboro-1580\Projects\1998\1584-98-109A Davie Co. Law Enforcement\Remediation Monitoring Reports\Corrective Action Performance Report (2024 July)\Tables_2024 Mon Rpt_preliminary.xlsx TABLE 6RECOVERY WELL LIQUID LEVEL DATADAVIE COUNTY LAW ENFORCEMENT CENTERMOCKSVILLE, NORTH CAROLINAS&ME PROJECT NO. 1584-98-109A Well ID Total Depth1 Screen Interval1 Top of Casing Consultant Installation Date Date DTW GWE DTP PT DTW GWE DTP PT DTW GWE DTP PT DTW GWE DTP PT 4/25/1997 NI NI NI NI NI NI NI NI NI NI NI NI 5/19/1997 NI NI NI NI NI NI NI NI NI NI NI NI 6/23/1997 NI NI NI NI NI NI NI NI NI NI NI NI 7/21/1997 NI NI NI NI NI NI NI NI NI NI NI NI 9/16/1997 NI NI NI NI NI NI NI NI NI NI NI NI 10/22/1997 NI NI NI NI NI NI NI NI NI NI NI NI 11/24/1997 NI NI NI NI NI NI NI NI NI NI NI NI 12/15/1997 NI NI NI NI NI NI NI NI NI NI NI NI 1/21/1998 NI NI NI NI NI NI NI NI NI NI NI NI 3/9/1998 NI NI NI NI NI NI NI NI NI NI NI NI 3/30/1998 NI NI NI NI NI NI NI NI NI NI NI NI 5/15/1998 NI NI NI NI NI NI NI NI NI NI NI NI 6/9/1998 NI NI NI NI NI NI NI NI NI NI NI NI 8/31/1998 NI NI NI NI NI NI NI NI NI NI NI NI 11/10/1998 NI NI NI NI NI NI NI NI NI NI NI NI 12/17/1998 NI NI NI NI NI NI NI NI NI NI NI NI 1/13/1999 NI NI NI NI NI NI NI NI NI NI NI NI 5/24/1999 NI NI NI NI NI NI NI NI NI NI NI NI 11/10/1999 NI NI NI NI NI NI NI NI NI NI NI NI 7/8/2000 NI NI NI NI NI NI NI NI NI NI NI NI 1/22/2001 NI NI NI NI NI NI NI NI NI NI NI NI 8/3/2001 NI NI NI NI NI NI NI NI NI NI NI NI 1/4/2002 NI NI NI NI NI NI NI NI NI NI NI NI 7/3/2002 NI NI NI NI NI NI NI NI NI NI NI NI 9/23/2002 27.54 821.33 26.60 0.94 24.89 818.84 nd 0.00 26.81 819.80 24.36 2.45 26.17 818.70 21.62 4.55 10/5/2002 27.70 821.40 26.50 1.20 24.85 818.88 nd 0.0 26.80 820.03 24.10 2.70 26.20 818.71 21.60 4.60 2/12/2003 29.11 822.73 24.75 4.36 24.00 819.90 23.80 0.20 24.78 820.97 23.32 1.46 25.60 819.68 20.58 5.02 3/26/2003 38.3 809.76 nd 0.00 29.20 814.53 nd 0.00 37.2 807.29 nd 0.00 24.75 816.27 24.65 0.10 12/22/2003 ------------ 2/3/2004 ------------ 7/7/2004 ---------26.35 815.16 25.68 0.67 5/3/2007 27.75 821.63 26.22 1.53 26.91 816.82 nd 0.00 26.80 817.71 26.78 0.02 24.60 817.00 23.83 0.77 5/12/2008 *29.10 821.99 25.6 3.50 25.30 818.43 nd 0.00 24.52 819.97 nd nd 23.20 817.82 23.10 0.10 5/5/2009 24.09 819.64 nd 0.00 20.17 824.32 nd nd 19.55 823.24 17.40 2.15 1/15/2011 25.10 824.15 23.73 1.37 22.82 820.91 nd 0.00 21.71 822.78 nd nd 21.76 820.60 20.11 1.65 11/28/2011 31.04 820.86 26.61 4.43 26.95 816.78 25.70 1.25 24.83 819.73 24.75 0.08 24.25 817.24 23.60 0.65 2/25/2013**29.00 822.87 24.60 4.40 23.25 820.48 nd 0.00 22.50 821.99 nd 0.00 22.10 820.00 20.75 1.35 2/20/2014 27.39 822.83 24.90 2.49 26.00 817.73 nd 0.00 28.50 815.99 nd 0.00 23.10 817.83 nd 0.00 2/20/2015*30.40 822.52 24.79 5.61 23.55 820.18 nd 0.00 22.80 821.69 nd 0.00 22.20 819.21 21.65 0.55 1/21/2016*25.10 823.57 24.40 0.70 23.84 819.89 nd 0.00 23.19 821.30 nd 0.00 21.25 819.70 21.23 0.02 7/28/2016*24.13 824.02 24.03 0.10 22.13 821.60 nd 0.00 21.23 823.26 nd 0.00 21.12 820.26 20.60 0.52 12/19/2016**25.66 823.40 24.51 1.15 --------21.85 819.18 21.74 0.11 10/18/2017*28.80 822.90 24.60 4.20 23.20 820.53 nd 0.00 22.38 822.11 nd 0.00 21.94 819.09 21.82 0.12 5/18/2018*24.80 823.39 24.65 0.15 21.61 822.12 nd 0.00 20.95 823.54 20.85 0.10 21.47 819.46 nd 0.00 4/2/2019*25.60 825.45 22.15 3.45 20.15 823.58 nd 0.00 20.02 824.47 nd 0.00 21.46 821.79 18.78 2.68 11/22/2019 22.67 825.48 22.57 0.10 21.42 822.31 nd 0.00 20.50 823.99 nd 0.00 20.24 820.79 20.12 0.12 9/14/2020 21.51 826.74 21.29 0.22 20.08 823.65 nd 0.00 19.37 825.12 nd 0.00 19.73 821.54 19.34 0.39 4/16/2021 20.75 827.33 20.73 0.02 19.73 824.00 nd 0.00 18.60 825.89 nd 0.00 18.32 822.71 18.2 0.12 10/6/2021 20.75 827.35 20.70 0.05 19.84 823.89 nd 0.00 19.19 825.30 nd 0.00 19.30 821.70 19.22 0.08 11/7/2022 22.38 825.69 22.37 0.01 20.81 822.92 nd 0.00 20.05 824.44 nd 0.00 19.65 821.28 nd 0.00 8/16/2023**21.43 826.65 21.41 0.02 20.16 823.57 nd 0.00 19.50 824.99 nd 0.00 19.20 821.73 nd 0.00 5/17/2024**21.21 826.85 nd 0.00 19.89 823.84 nd 0.00 18.92 825.57 nd 0.00 18.53 822.40 nd 0.00 Thickness Change -0.02 No Free Product Since 2011 No Free Product Since 2018 No Free Product Since 2021 Notes: Measurements are displayed in feet NI = Recovery well was not installed at the date of measurement 1Measured relative to ground surface PT = Free product thickness in feet DTW = Depth to water measured from top of casing in feet DTP = Depth to free product measured from top of casing in feet nd = Free product not detected - = No data * = Measurements were collected after a complete shut down of the system for approximately 2 weeks. ** = Measurements were collected after a complete shut down of the recovery well pumps for approximately 5 weeks. Groundwater Elevation (GWE) corrected for free product by factoring the specific gravity of diesel fuel above the static water column 15.00-30.00 46.3540.60 S&ME S&ME 8/13/2002 8/15/2002 840.93 48.75 RW-8 13.70-43.20 16.55-35.05 16.30-40.80 RW-5 RW-6 RW-7 product below pump 8/13/2002 S&ME S&ME 35.00 848.06 8/12/2002 843.73 844.49 T:\Greensboro-1580\Projects\1998\1584-98-109A Davie Co. Law Enforcement\Remediation Monitoring Reports\Corrective Action Performance Report (2024 July)\Tables_2024 Mon Rpt_preliminary.xlsx TABLE 6RECOVERY WELL LIQUID LEVEL DATADAVIE COUNTY LAW ENFORCEMENT CENTERMOCKSVILLE, NORTH CAROLINAS&ME PROJECT NO. 1584-98-109A Well ID Total Depth1 Screen Interval1 Top of Casing Consultant Installation Date Date DTW GWE DTP PT DTW GWE DTP PT DTW GWE DTP PT DTW GWE DTP PT 4/25/1997 NI NI NI NI NI NI NI NI NI NI NI NI 5/19/1997 NI NI NI NI NI NI NI NI NI NI NI NI 6/23/1997 NI NI NI NI NI NI NI NI NI NI NI NI 7/21/1997 NI NI NI NI NI NI NI NI NI NI NI NI 9/16/1997 NI NI NI NI NI NI NI NI NI NI NI NI 10/22/1997 NI NI NI NI NI NI NI NI NI NI NI NI 11/24/1997 NI NI NI NI NI NI NI NI NI NI NI NI 12/15/1997 NI NI NI NI NI NI NI NI NI NI NI NI 1/21/1998 NI NI NI NI NI NI NI NI NI NI NI NI 3/9/1998 NI NI NI NI NI NI NI NI NI NI NI NI 3/30/1998 NI NI NI NI NI NI NI NI NI NI NI NI 5/15/1998 NI NI NI NI NI NI NI NI NI NI NI NI 6/9/1998 NI NI NI NI NI NI NI NI NI NI NI NI 8/31/1998 NI NI NI NI NI NI NI NI NI NI NI NI 11/10/1998 NI NI NI NI NI NI NI NI NI NI NI NI 12/17/1998 NI NI NI NI NI NI NI NI NI NI NI NI 1/13/1999 NI NI NI NI NI NI NI NI NI NI NI NI 5/24/1999 NI NI NI NI NI NI NI NI NI NI NI NI 11/10/1999 NI NI NI NI NI NI NI NI NI NI NI NI 7/8/2000 NI NI NI NI NI NI NI NI NI NI NI NI 1/22/2001 NI NI NI NI NI NI NI NI NI NI NI NI 8/3/2001 NI NI NI NI NI NI NI NI NI NI NI NI 1/4/2002 NI NI NI NI NI NI NI NI NI NI NI NI 7/3/2002 NI NI NI NI NI NI NI NI NI NI NI NI 9/23/2002 28.21 818.26 22.68 5.53 24.24 818.49 24.17 0.07 24.75 816.48 23.71 1.04 24.44 813.05 24.26 0.18 10/5/2002 28.00 818.18 22.80 5.20 24.25 818.51 24.15 0.10 24.60 816.51 23.70 0.9 24.25 813.19 24.12 0.13 2/12/2003 25.34 819.45 21.75 3.59 23.31 819.61 23.02 0.29 23.92 817.93 22.17 1.75 22.45 814.88 nd 0.00 3/26/2003 27.35 814.33 nd 0.00 34.00 808.67 nd 0.00 30.00 810.33 nd 0.00 27.20 810.13 nd 0.00 12/22/2003 ------------ 2/3/2004 ------------ 7/7/2004 ------------ 5/3/2007 24.66 817.02 nd 0.00 25.25 817.42 nd 0.00 24.75 815.67 24.65 0.10 23.78 813.55 nd 0.00 5/12/2008 *23.90 817.78 nd 0.00 24.65 818.07 24.59 0.06 24.20 816.58 23.68 0.52 23.80 813.94 23.33 0.47 5/5/2009 19.70 821.98 nd 0.00 - ---20.99 821.70 18.27 2.72 18.25 819.08 nd nd 1/15/2011 20.76 820.94 20.74 0.02 21.39 821.36 21.30 0.09 22.30 818.64 21.60 0.70 22.64 814.69 nd 0.00 11/28/2011 23.95 817.77 23.90 0.05 24.39 818.28 nd 0.00 26.33 815.07 25.09 1.24 26.12 811.40 25.90 0.22 2/25/2013**21.25 820.43 nd 0.00 21.90 820.77 nd 0.00 22.30 818.03 nd 0.00 23.33 814.03 23.30 0.03 2/20/2014 23.80 817.88 nd 0.00 - - - -24.30 817.85 22.20 2.10 22.50 814.92 22.40 0.10 2/20/2015*22.15 819.53 nd 0.00 22.35 820.32 nd 0.00 23.70 817.45 22.75 0.95 23.85 813.48 nd 0.00 1/21/2016*21.73 819.95 nd 0.00 21.83 820.84 nd 0.00 22.62 818.58 21.62 1.00 21.52 815.81 nd 0.00 7/28/2016*21.29 820.39 nd 0.00 21.52 821.15 nd 0.00 22.40 817.94 22.39 0.01 23.31 814.02 nd 0.00 12/19/2016**--------24.18 816.51 23.77 0.41 24.39 812.94 nd 0.00 10/18/2017*22.37 819.31 nd 0.00 ----23.95 816.44 23.88 0.07 24.78 812.55 nd 0.00 5/18/2018*21.47 820.21 nd 0.00 ----22.93 817.43 22.90 0.03 22.91 814.42 nd 0.00 4/2/2019*19.60 822.08 nd 0.00 19.65 823.02 nd 0.00 22.75 819.29 20.77 1.98 20.80 816.58 20.74 0.06 11/22/2019 20.63 821.05 nd 0.00 ----22.58 817.89 22.42 0.16 23.00 814.77 22.49 0.51 9/14/2020 19.76 821.92 nd 0.00 ----22.33 818.69 21.53 0.80 21.97 815.38 21.95 0.02 4/16/2021 18.52 823.16 nd 0.00 ----20.48 819.91 20.41 0.07 20.21 817.14 20.19 0.02 10/6/2021 19.67 822.01 nd 0.00 ----31.73 808.60 nd 0.00 22.27 815.08 22.25 0.02 11/7/2022 20.08 821.60 nd 0.00 19.92 822.75 nd 0.00 22.47 817.88 22.45 0.02 22.92 814.43 22.90 0.02 8/16/2023**19.82 821.86 nd 0.00 19.71 822.96 nd 0.00 21.36 819.11 21.20 0.16 21.93 815.40 nd 0.00 5/17/2024**18.88 822.80 nd 0.00 19.71 822.96 nd 0.00 20.75 819.58 nd 0.00 20.82 816.51 nd 0.00 Thickness Change No Free Product Since 2011 No Free Product Since 2011 -0.16 No Free Product Since 2022 Notes: Measurements are displayed in feet NI = Recovery well was not installed at the date of measurement 1Measured relative to ground surface PT = Free product thickness in feet DTW = Depth to water measured from top of casing in feet DTP = Depth to free product measured from top of casing in feet nd = Free product not detected - = No data * = Measurements were collected after a complete shut down of the system for approximately 2 weeks. ** = Measurements were collected after a complete shut down of the recovery well pumps for approximately 4-5 weeks. Groundwater Elevation (GWE) corrected for free product by factoring the specific gravity of diesel fuel above the static water column 8/16/2002 S&ME S&ME 15.00-35.00 8/15/2002 8/14/2002 837.33 16.70-36.70 8/16/2002 15.85-30.3518.30-32.80 S&ME S&ME 841.68 842.67 840.33 RW-12 41.70 RW-11 38.80 RW-9 40.00 RW-10 36.00 T:\Greensboro-1580\Projects\1998\1584-98-109A Davie Co. Law Enforcement\Remediation Monitoring Reports\Corrective Action Performance Report (2024 July)\Tables_2024 Mon Rpt_preliminary.xlsx TABLE 7Free Product Volume EstimationDavie County Law Enforcement Center, Incident # 14691 S&ME Project No. 1584-98-109A Date 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-8.0 8.0-8.37 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.1917,310 14,047 11,999 8,471 5,324 5,029 2,698 1,907 960 8,700 21,100 30,000 29,600 24,000 27,700 17,500 14,300 7,900 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-8.0 8.0-8.05 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.025 14,941 12,244 10,373 7,844 5,843 4,632 3,843 3,277 533 7,500 18,400 25,900 27,500 26,300 25,500 25,000 24,600 4,300 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-7.9 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.4517,045 12,650 13,083 9,046 8,101 7,699 4,457 1,613 8,500 19,000 32,700 31,700 36,500 42,300 29,000 12,0000.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-7.24 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.1212,783 9,444 6,320 5,144 3,550 3,206 1,804 922 6,400 14,200 15,800 18,000 16,000 17,600 11,700 6,600 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0-4.16 0.5 1.5 2.5 3.5 4.1 23,721 15,540 9,958 1,664 824 11,900 23,300 24,900 5,800 3,400 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 4.4 0.5 1.5 2.5 3.5 4.222,581 23,349 2,820 1,734 753 11,300 35,000 7,100 6,100 3,2000.0 - 1.0 1.0 - 2.0 2.0 - 2.5 0.5 1.5 2.25018,535 11,960 18,535 9,300 17,900 41,700 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 3.17 0.5 1.5 2.5 3.1 36,383 9,547 2,136 767 18,200 14,300 5,300 2,400 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 3.37 4.0-5.0 0.5 1.5 2.5 3.19 23,443 4,248 1,693 531 0 11,700 6,400 4,200 1,7000.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 3.46 4.0-5.0 0.5 1.5 2.5 3.2320,687 3,716 1,692 532 0 10,300 5,600 4,200 1,700 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 3.56 4.0-5.0 0.5 1.5 2.5 3.28 17,010 10,880 5,080 1,940 0 8,500 16,300 12,700 6,400 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 3.44 4.0-5.0 0.5 1.5 2.5 3.22 42,675 1,690 1,025 430 0 21,300 2,500 2,600 1,400 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 3.38 4.0-5.0 0.5 1.5 2.5 3.19 36,180 2,100 1,140 410 0 18,100 3,200 2,900 1,300 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 0.5 1.5 2.5 25,640 2,750 640 12,800 4,100 1,600 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 0.5 1.5 2.5 17,355 605 355 8,700 900 900 0.0 - 1.0 0.5 16,160 8,100 0.0 - 1.0 1.0 - 2.0 0.5 1.5 7,566 591 3,800 900 Date Total Gallons Total Pounds 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-8.0 8.0-8.37 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-8.0 8.0-8.372,200 5,300 7,500 7,400 6,000 6,900 4,400 3,600 2,000 4,900 11,900 16,800 16,600 13,500 15,500 9,900 8,100 4,5000.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-8.0 8.0-8.05 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-8.0 8.0-8.05 1,900 4,600 6,500 6,900 6,600 6,400 6,300 6,200 1,100 4,300 10,300 14,600 15,500 14,800 14,400 14,100 13,900 2,500 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-7.9 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-7.9 2,100 4,800 8,200 7,900 9,100 10,600 7,300 3,000 4,700 10,800 18,400 17,700 20,400 23,800 16,400 6,7000.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-7.24 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0-6.0 6.0-7.0 7.0-7.241,600 3,600 4,000 4,500 4,000 4,400 2,900 1,700 3,600 8,100 9,000 10,100 9,000 9,900 6,500 3,8000.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0-4.16 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0-4.16 3,000 5,800 6,200 1,500 900 6,700 13,000 13,900 3,400 2,000 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 4.4 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 4.4 2,800 8,800 1,800 1,500 800 6,300 19,700 4,000 3,400 1,8000.0 - 1.0 1.0 - 2.0 2.0 - 2.5 0.0 - 1.0 1.0 - 2.0 2.0 - 2.52,300 4,500 10,400 5,200 10,100 23,3000.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 3.17 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 3.17 4,600 3,600 1,300 600 10,300 8,100 2,900 1,300 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 2,900 1,600 1,100 400 6,500 3,600 2,500 900 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 2,600 1,400 1,100 400 5,800 3,100 2,500 9000.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 2,100 4,100 3,200 1,600 4,700 9,200 7,200 3,600 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 5,300 600 700 400 11,900 1,300 1,600 900 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 3.38 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3.0 - 3.38 4,500 800 700 300 10,100 1,800 1,600 700 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 3,200 1,000 400 7,200 2,200 900 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 2,200 200 200 4,900 400 400 0.0 - 1.0 0.0 - 1.0 2,000 4,500 0.0 - 1.0 1.0 - 2.0 0.0 - 1.0 1.0 - 2.0 1,000 200 2,200 400 Notes:change from prior monitoring event =1,900 14,000 Date: Date of Free Product Thickness Maps FP = Free Product FP Thickness Contours based on FP measured in the monitor/recovery wells FP volume based on an assumed 30% aquifer porosity 4,500 33,200 11/7/22 5,700 42,000 5/17/24 2,600 19,200 4/2/19 11/22/19 15,700 115,700 2/20/14 38,600 284,500 12/19/16 22,600 4/2/19 24,700 182,000 8/16/23 5/5/09 39,000 287,400 2/25/13 35,200 259,400 166,600 5/18/18 12,300 90,700 10/17/17 13,500 99,500 118,900 876,300 2008 60,000 442,200 10/17/17 5/17/24 9/14/20 4/16/21 9/23/04 11/7/22 8/16/23 140 South Main Street, Mocksville, Davie County, North Carolina Surface Area between FP Thickness Contours (ft^2)Average FP Thickness (ft) * Area (ft^2) = Bulk Volume (ft^3) Between Contours 11/24/97 12/17/98 Revised: 8/24/2023 9/23/04 12/17/98 104,400 769,400 2008 5/5/09 2/25/13 2/20/14 12/19/16 11/22/19 Estimated FP Thickness in Aquifer Volume (ft^3) Between Contours (3:1 ratio)Estimated FP Volume (ft^3*7.48 gal/ft^3) x 30% porosity 11/24/97 101,700 749,500 5/18/18 4/16/21 10,300 75,900 9/14/20 14,200 104,700 TABLE 8 SUMMARY OF EFFLUENT ANALYTICAL RESULTS & SYSTEM FLOW DATA DAVIE COUNTY LAW ENFORCEMENT CENTER MOCKSVILLE, NORTH CAROLINA S&ME PROJECT NO. 1584-98-109A Sample Date Na p h t h a l e n e To t a l P h e n o l Oi l a n d G r e a s e To t a l S u s p e n d e d S o l i d s (T S S ) pH To t a l i z e r F l o w M e t e r Re a d i n g s f o r T r e a t e d Ef f l u e n t Ef f l u e n t V o l u m e Di s c h a r g e d S i n c e L a s t Me t e r R e a d i n g Method SW 8270D PAH SIM EPA 420.1 EPA 1664B SM 2540D-1997 Field Parameter Flow Meter Calculated units (ug/L)(mg/L)(mg/L)(mg/L)(Standard Units)(gallons)(gallons) 3/19/2015 <0.033 <0.03 <2.40 <1 7.4 3,963,510 228,980 6/19/2015 <0.033 <0.03 <2.40 <2.5 6.9 4,209,870 246,360 10/2/2015 <0.033 0.14 <2.40 <2.5 6.9 4,353,070 143,200 11/5/2015 NA 0.03 J NA NA 7.0 4,396,280 43,210 1/8/2016 <0.033 <0.03 <2.40 <2.5 7.1 4,561,500 165,220 4/7/2016 <0.033 0.03 J 3.52 J <4.2 7.0 4,830,550 269,050 6/30/2016 <0.033 0.04 J 6.10 2.9 6.8 5,074,200 243,650 10/6/2016 <0.033 0.03 J <2.40 <2.5 7.0 5,539,975 465,775 3/3/2017 <0.059 <0.03 <2.40 <2.5 7.6 5,641,370 101,395 4/25/2017 <0.059 0.16 4.48 <2.5 6.9 5,741,680 100,310 10/5/2017 <0.076 <0.034 2.69 J 5.5 7.1 6,127,260 385,580 12/1/2017 <0.076 <0.034 <2.40 16 7.2 6,186,460 59,200 3/30/2018 <0.076 <0.034 2.40 J 5.6 7.7 6,404,050 217,590 6/29/2018 <0.076 0.054 4.26 J 12 7.4 6,573,480 169,430 8/6/2018 <0.076 0.069 2.48 J 16 7.4 6,610,550 37,070 12/6/2018 0.22 0.11 3.45 J 12 7.3 6,812,000 201,450 2/25/2019 15 0.13 <1.50 16 7.4 6,970,680 158,680 4/14/2019 <0.035 <0.034 4.07 J 4 7.3 7,136,290 165,610 12/9/2019 <0.035 <0.034 10.80 12 7.4 7,510,430 374,140 3/6/2020 <0.035 <0.034 3.23 J 5.5 7.0 7,680,020 169,590 6/16/2020 <0.035 0.036 J <1.50 5.8 7.4 7,802,790 122,770 9/24/2020 <0.050 <0.034 <1.50 24 7.2 7,902,240 99,450 12/16/2020 <0.050 0.057 2.76 J 3.8 6.8 8,108,100 205,860 3/3/2021 <0.050 0.079 9.85 3.5 7.3 8,207,420 99,320 6/23/2021 <0.050 <0.034 1.57 3.5 NA 8,307,800 100,380 9/13/2021 <0.050 <0.034 <1.50 4.9 NA 8,372,220 64,420 12/17/2021 0.45 0.036 J 1.58 8.6 7.1 8,540,370 168,150 3/30/2022 1.6 0.028 <4.9 29.4 6.3 8,729,838 189,468 5/24/2022 <9.1 <0.020 <4.9 16.6 6.8 8,820,390 90,552 8/12/2022 <9.1 0.021 <4.9 20.0 6.6 8,917,084 96,694 11/30/2022 <8.3 <0.020 <4.8 7.9 7.2 46,170 46,170 3/2/2023 <1.5 <0.020 <4.9 5.4 6.7 104,120 57,950 6/6/2023 <8.3 <0.020 <4.8 24.0 7.0 218,270 172,100 6/28/2023 NA NA NA 7.5 NA 265,320 47,050 8/29/2023 <10.0 <0.020 <4.8 11.0 7.0 297,550 32,230 12/12/2023 <1.5 <0.020 <4.9 7.5 6.8 382,410 84,860 1/10/2024 <8.3 <0.020 <4.8 12.3 6.8 400,460 18,050 4/24/2024 <1.5 0.010 <4.9 10.9 6.8 446,440 45,980 Permit Defined Effluent Limits - Daily Maximum 12 0.300 monitor only 30 > 6.0 pH <9.0 monitor only monitor only milligrams per liter (mg/L) NA = Not analyzed for constituent micrograms per liter (ug/L)J = Estimated concentration NA = Not analyzed for constituent Revison Date: 7/11/2024 T:\Greensboro-1580\Projects\1998\1584-98-109A Davie Co. Law Enforcement\Remediation Monitoring Reports\Corrective Action Performance Report (2024 July)\Tables_2024 Mon Rpt_preliminary.xlsx SUMMARY OF FREE-PRODUCT RECOVERY AND GROUNDWATER RECOVERY DAVIE COUNTY LAW ENFORCEMENT CENTER MOCKSVILLE, NORTH CAROLINA S&ME PROJECT NO. 1584-98-109A Revision Date: 8/16/2023 Date of Product Pick-Up Free Product Recycling Contractor Volume of Product Recovered and Recycled (Gallons) Free-Product Recovered for Calendar Year (Gallons) Total Gallons Of Water Treated and Discharged* Gallons Free Product / Total Water Recovered & Treated 3/21/2003 Holston 1000 5/27/2003 Holston 870 7/10/2003 A&D 941 10/13/2003 A&D 105 10/16/2003 Holston 1045 12/18/2003 Holston 760 4,721 1,644,830 0.29% 4/14/2004 Holston 900 6/22/2004 Holston 1000 7/19/2004 Holston 700 8/11/2004 Holston 700 9/13/2004 Holston 900 10/29/2004 Holston 976 12/7/2004 Holston 1000 6,176 1,974,220 0.31% 1/25/2005 Holston 900 3/16/2005 Holston 800 4/21/2005 Holston 940 5/4/2005 Holston 632 6/14/2005 Holston 750 8/19/2005 Holston 850 10/25/2005 Holston 900 5,772 1,547,660 0.37% 1/26/2006 Holston 900 7/19/2006 Holston 755 1,655 1,801,870 0.09% 1/5/2007 Holston 915 5/8/2007 Holston 745 11/12/2007 Holston 785 2,445 1,195,030 0.20% 5/27/2008 Holston 800 9/10/2008 Holston 865 1,665 875,620 0.19% 3/11/2009 Holston 700 5/7/2009 Holston 650 7/17/2009 Holston 755 9/25/2009 Holston 600 11/25/2009 Holston 950 3,655 826,330 0.44% 2/19/2010 Holston 800 4/20/2010 Holston 965 6/9/2010 Holston 750 8/17/2010 Holston 830 10/29/2010 Holston 630 3,975 415,913 0.96% 1/26/2011 Holston 800 4/12/2011 Holston 500 7/20/2011 Holston 700 10/14/2011 Holston 600 2,600 717,687 0.36% 4/30/2012 Holston 375 7/18/2012 Holston 400 12/7/2012 Holston 400 1,175 542,580 0.22% 8/7/2013 Holston 600 600 892,790 0.07% 5/2/2014 Holston 700 700 1,214,640 0.06% 9/15/2015 Holston 800 800 800,100 0.10% 1/21/2016 Noble Oil 692 7/12/2016 Noble Oil 565 12/19/16 Noble Oil 30 1,287 947,595 0.14% 12/15/17 Noble Oil 402 402 646,485 0.06% 12/4/18 Noble Oil 440 440 6/4/19 Noble Oil 391 12/4/19 Noble Oil 123 514 305,720 0.17% 6/1/20 Noble Oil 158 12/2/20 Noble Oil 113 271 490,620 0.06% 3/28/22 Noble Oil 146 146 728,798 0.02% 10/12/22 Noble Oil 221 221 205,186 0.11% 8/16/23 In Tank 195 195 268,180 0.07% 6/25/24 In Tank 79 27 163,782 0.02% Total Free-Product Recovered 39,494 18,205,636 Note: The recovered free-product varied in terms of water content. * = Approximate volume for reporting period calculated using nearest period end flow readings obtained during a site visit TABLE 9 T:\Greensboro-1580\Projects\1998\1584-98-109A Davie Co. Law Enforcement\Remediation Monitoring Reports\Corrective Action Performance Report (2024 July)\Tables_2024 Mon Rpt_preliminary.xlsx Appendices Appendix I – Historic Cross-Sections Appendix II – Fluid Level Measurements Date:Technician: Notes: MW-1 N/D 2.89 N/D MW-2 N/D 19.41 N/D Davie County Law Enforcement Center S&ME Project No. 1584-98-109A Friday, May 17, 2024 Gary Simcox Well ID Depth to Product Depth to Water Product Thickness MW-5 N/D 35.51 N/D MW-6d Not measured Not measured MW-3 N/D 23.20 N/D MW-4 N/D 28.33 N/D MW-9 19.79 21.82 2.03 MW-10 N/D 17.69 N/D MW-7 26.92 26.99 0.07 MW-8 21.01 21.20 0.19 MW-13 N/D 13.02 N/D MW-14 N/D 20.71 N/D MW-11 N/D 18.34 N/D MW-12 N/D 16.28 N/D RW-1 26.98 27.00 0.02 RW-2 N/D 25.45 N/D MW-15 N/D 21.32 N/D RW-5 N/D 21.21 N/D RW-6 N/D 19.89 N/D RW-3 18.85 19.01 0.16 RW-4 N/D 20.77 N/D RW-9 N/D 18.88 N/D RW-10 N/D 19.71 N/D RW-7 N/D 18.92 N/D RW-8 N/D 18.53 N/D Sump Not Measured Not Measured RW-11 N/D 20.75 N/D RW-12 N/D 20.82 N/D Appendix III - Lab Reports for Effluent Samples #=CL# December 18, 2023 LIMS USE: FR - ED HENRIQUES LIMS OBJECT ID: 92703252 92703252 Project: Pace Project No.: RE: Mr. Ed Henriques S&ME, Inc. 8646 West Market Street Suite 105 Greensboro, NC 27409 Davie County Law Enforcement Dear Mr. Henriques: Enclosed are the analytical results for sample(s) received by the laboratory on December 12, 2023. The results relate only to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report. The test results provided in this final report were generated by each of the following laboratories within the Pace Network: • Pace Analytical Services - Asheville • Pace Analytical Services - Charlotte If you have any questions concerning this report, please feel free to contact me. Sincerely, Angela Baioni angela.baioni@pacelabs.com Project Manager 612-473-6801 Enclosures cc:Cody McMechen Cody McMechen, S+ME REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 1 of 19 #=CP# CERTIFICATIONS Pace Project No.: Project: 92703252 Davie County Law Enforcement Pace Analytical Services Charlotte South Carolina Laboratory ID: 99006 9800 Kincey Ave. Ste 100, Huntersville, NC 28078 North Carolina Drinking Water Certification #: 37706 North Carolina Field Services Certification #: 5342 North Carolina Wastewater Certification #: 12 South Carolina Laboratory ID: 99006 South Carolina Certification #: 99006001 South Carolina Drinking Water Cert. #: 99006003 Florida/NELAP Certification #: E87627 Kentucky UST Certification #: 84 Louisiana DoH Drinking Water #: LA029 Virginia/VELAP Certification #: 460221 Pace Analytical Services Asheville 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 South Carolina Laboratory ID: 99030 South Carolina Certification #: 99030001 Virginia/VELAP Certification #: 460222 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 2 of 19 #=SS# SAMPLE SUMMARY Pace Project No.: Project: 92703252 Davie County Law Enforcement Lab ID Sample ID Matrix Date Collected Date Received 92703252001 Effluent Water 12/12/23 08:15 12/12/23 13:56 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 3 of 19 #=SA# SAMPLE ANALYTE COUNT Pace Project No.: Project: 92703252 Davie County Law Enforcement Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 92703252001 Effluent EPA 1664B 1 PASI-CDVR EPA 8270E by SIM 21 PASI-CBPJ SM 2540D-2015 1 PASI-AJAY EPA 420.4 Rev 1.0 1993 1 PASI-AARJ PASI-A = Pace Analytical Services - Asheville PASI-C = Pace Analytical Services - Charlotte REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 4 of 19 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92703252 Davie County Law Enforcement Method: Client:S&ME - Greensboro EPA 1664B Date:December 18, 2023 Description:HEM, Oil and Grease General Information: 1 sample was analyzed for EPA 1664B by Pace Analytical Services Charlotte. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below. Continuing Calibration: All criteria were within method requirements with any exceptions noted below. Surrogates: All surrogates were within QC limits with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. Duplicate Sample: All duplicate sample results were within method acceptance criteria with any exceptions noted below. Additional Comments: REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 5 of 19 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92703252 Davie County Law Enforcement Method: Client:S&ME - Greensboro EPA 8270E by SIM Date:December 18, 2023 Description:8270E Low Volume PAH SIM General Information: 1 sample was analyzed for EPA 8270E by SIM by Pace Analytical Services Charlotte. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Sample Preparation: The samples were prepared in accordance with EPA 3511 with any exceptions noted below. Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below. Continuing Calibration: All criteria were within method requirements with any exceptions noted below. Internal Standards: All internal standards were within QC limits with any exceptions noted below. Surrogates: All surrogates were within QC limits with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. Additional Comments: REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 6 of 19 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92703252 Davie County Law Enforcement Method: Client:S&ME - Greensboro SM 2540D-2015 Date:December 18, 2023 Description:2540D Total Suspended Solids General Information: 1 sample was analyzed for SM 2540D-2015 by Pace Analytical Services Asheville. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. Duplicate Sample: All duplicate sample results were within method acceptance criteria with any exceptions noted below. Additional Comments: REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 7 of 19 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92703252 Davie County Law Enforcement Method: Client:S&ME - Greensboro EPA 420.4 Rev 1.0 1993 Date:December 18, 2023 Description:420.4 Phenolics, Total General Information: 1 sample was analyzed for EPA 420.4 Rev 1.0 1993 by Pace Analytical Services Asheville. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Sample Preparation: The samples were prepared in accordance with EPA 420.4 Rev 1.0 1993 with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. QC Batch: 819505 A matrix spike and/or matrix spike duplicate (MS/MSD) were performed on the following sample(s): 35846077009,35846077018 M1: Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. • MS (Lab ID: 4241936) • Phenolics, Total Recoverable • MS (Lab ID: 4241938) • Phenolics, Total Recoverable • MSD (Lab ID: 4241939) • Phenolics, Total Recoverable Additional Comments: This data package has been reviewed for quality and completeness and is approved for release. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 8 of 19 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92703252 Davie County Law Enforcement Sample:Effluent Lab ID:92703252001 Collected:12/12/23 08:15 Received:12/12/23 13:56 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: EPA 1664B Pace Analytical Services - Charlotte HEM, Oil and Grease Oil and Grease <4.9 mg/L 12/18/23 13:154.9 1.1 1 Analytical Method: EPA 8270E by SIM Preparation Method: EPA 3511 Pace Analytical Services - Charlotte 8270E Low Volume PAH SIM Acenaphthene <0.50 ug/L 12/18/23 10:29 83-32-912/15/23 16:030.50 0.062 1 Acenaphthylene <0.50 ug/L 12/18/23 10:29 208-96-812/15/23 16:030.50 0.027 1 Anthracene <0.050 ug/L 12/18/23 10:29 120-12-712/15/23 16:030.050 0.030 1 Benzo(a)anthracene <0.050 ug/L 12/18/23 10:29 56-55-312/15/23 16:030.050 0.037 1 Benzo(a)pyrene <0.10 ug/L 12/18/23 10:29 50-32-812/15/23 16:030.10 0.043 1 Benzo(b)fluoranthene <0.050 ug/L 12/18/23 10:29 205-99-212/15/23 16:030.050 0.035 1 Benzo(g,h,i)perylene <0.20 ug/L 12/18/23 10:29 191-24-212/15/23 16:030.20 0.031 1 Benzo(k)fluoranthene <0.20 ug/L 12/18/23 10:29 207-08-912/15/23 16:030.20 0.038 1 Chrysene <0.10 ug/L 12/18/23 10:29 218-01-912/15/23 16:030.10 0.032 1 Dibenz(a,h)anthracene <0.15 ug/L 12/18/23 10:29 53-70-312/15/23 16:030.15 0.029 1 Fluoranthene <0.30 ug/L 12/18/23 10:29 206-44-012/15/23 16:030.30 0.046 1 Fluorene <0.31 ug/L 12/18/23 10:29 86-73-712/15/23 16:030.31 0.031 1 Indeno(1,2,3-cd)pyrene <0.050 ug/L 12/18/23 10:29 193-39-512/15/23 16:030.050 0.029 1 1-Methylnaphthalene <0.81 ug/L 12/18/23 10:29 90-12-012/15/23 16:030.81 0.033 1 2-Methylnaphthalene <0.81 ug/L 12/18/23 10:29 91-57-612/15/23 16:030.81 0.038 1 Naphthalene <1.5 ug/L 12/18/23 10:29 91-20-312/15/23 16:031.5 0.065 1 Phenanthrene <0.20 ug/L 12/18/23 10:29 85-01-812/15/23 16:030.20 0.042 1 Pyrene <0.10 ug/L 12/18/23 10:29 129-00-012/15/23 16:030.10 0.054 1 Surrogates Nitrobenzene-d5 (S)117 %12/18/23 10:29 4165-60-012/15/23 16:0347-188 1 2-Fluorobiphenyl (S)94 %12/18/23 10:29 321-60-812/15/23 16:0340-167 1 Terphenyl-d14 (S)121 %12/18/23 10:29 1718-51-012/15/23 16:0346-173 1 Analytical Method: SM 2540D-2015 Pace Analytical Services - Asheville 2540D Total Suspended Solids Total Suspended Solids 7.5 mg/L 12/14/23 16:413.3 3.3 1 Analytical Method: EPA 420.4 Rev 1.0 1993 Preparation Method: EPA 420.4 Rev 1.0 1993 Pace Analytical Services - Asheville 420.4 Phenolics, Total Phenolics, Total Recoverable <0.020 mg/L 12/14/23 12:28 64743-03-912/14/23 10:200.020 0.0076 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 12/18/2023 08:16 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 9 of 19 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92703252 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 820296 EPA 1664B EPA 1664B 1664 HEM, Oil and Grease Laboratory:Pace Analytical Services - Charlotte Associated Lab Samples:92703252001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4245885 Associated Lab Samples:92703252001 Matrix:Water AnalyzedMDL Oil and Grease mg/L <5.0 5.0 12/18/23 13:151.1 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4245886LABORATORY CONTROL SAMPLE: LCSSpike Oil and Grease mg/L 34.340 86 78-114 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 4245887MATRIX SPIKE SAMPLE: MSSpike Result 35847270001 Oil and Grease mg/L 32.938.8 84 78-1141.1U Parameter Units Dup Result Max RPD QualifiersRPDResult 92703252001 4245888SAMPLE DUPLICATE: Oil and Grease mg/L <4.9 30<4.9 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 12/18/2023 08:16 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 10 of 19 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92703252 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 819879 EPA 3511 EPA 8270E by SIM 8270E 3511 Low Volume PAH SIM Laboratory:Pace Analytical Services - Charlotte Associated Lab Samples:92703252001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4243832 Associated Lab Samples:92703252001 Matrix:Water AnalyzedMDL 1-Methylnaphthalene ug/L <0.80 0.80 12/18/23 09:240.033 2-Methylnaphthalene ug/L <0.80 0.80 12/18/23 09:240.037 Acenaphthene ug/L <0.50 0.50 12/18/23 09:240.061 Acenaphthylene ug/L <0.50 0.50 12/18/23 09:240.027 Anthracene ug/L <0.050 0.050 12/18/23 09:240.029 Benzo(a)anthracene ug/L <0.050 0.050 12/18/23 09:240.037 Benzo(a)pyrene ug/L <0.10 0.10 12/18/23 09:240.043 Benzo(b)fluoranthene ug/L <0.050 0.050 12/18/23 09:240.035 Benzo(g,h,i)perylene ug/L <0.20 0.20 12/18/23 09:240.031 Benzo(k)fluoranthene ug/L <0.20 0.20 12/18/23 09:240.038 Chrysene ug/L <0.10 0.10 12/18/23 09:240.032 Dibenz(a,h)anthracene ug/L <0.15 0.15 12/18/23 09:240.029 Fluoranthene ug/L <0.30 0.30 12/18/23 09:240.045 Fluorene ug/L <0.31 0.31 12/18/23 09:240.031 Indeno(1,2,3-cd)pyrene ug/L <0.050 0.050 12/18/23 09:240.029 Naphthalene ug/L <1.5 1.5 12/18/23 09:240.064 Phenanthrene ug/L <0.20 0.20 12/18/23 09:240.042 Pyrene ug/L <0.10 0.10 12/18/23 09:240.054 2-Fluorobiphenyl (S)%96 40-167 12/18/23 09:24 Nitrobenzene-d5 (S)%122 47-188 12/18/23 09:24 Terphenyl-d14 (S)%125 46-173 12/18/23 09:24 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4243833LABORATORY CONTROL SAMPLE: LCSSpike 1-Methylnaphthalene ug/L 2.02.5 79 70-130 2-Methylnaphthalene ug/L 1.92.5 76 70-130 Acenaphthene ug/L 1.92.5 78 70-130 Acenaphthylene ug/L 1.92.5 74 70-130 Anthracene ug/L 2.72.5 109 70-130 Benzo(a)anthracene ug/L 2.02.5 81 70-130 Benzo(a)pyrene ug/L 2.02.5 80 70-130 Benzo(b)fluoranthene ug/L 2.02.5 80 70-130 Benzo(g,h,i)perylene ug/L 2.12.5 86 70-130 Benzo(k)fluoranthene ug/L 3.02.5 119 70-130 Chrysene ug/L 2.92.5 115 70-130 Dibenz(a,h)anthracene ug/L 2.02.5 80 70-130 Fluoranthene ug/L 2.62.5 105 70-130 Fluorene ug/L 2.12.5 82 70-130 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 12/18/2023 08:16 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 11 of 19 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92703252 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4243833LABORATORY CONTROL SAMPLE: LCSSpike Indeno(1,2,3-cd)pyrene ug/L 2.02.5 82 70-130 Naphthalene ug/L 2.12.5 84 70-130 Phenanthrene ug/L 1.92.5 76 70-130 Pyrene ug/L 2.62.5 103 70-130 2-Fluorobiphenyl (S)%94 40-167 Nitrobenzene-d5 (S)%115 47-188 Terphenyl-d14 (S)%117 46-173 Parameter Units MS Result % Rec Limits Qual% RecConc. 4243834MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92703252001 4243835 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. 1-Methylnaphthalene ug/L 5 85 46-15993 9 305<0.81 4.2 4.6 2-Methylnaphthalene ug/L 5 83 40-16488 7 305<0.81 4.1 4.4 Acenaphthene ug/L 5 83 46-15492 10 305<0.50 4.1 4.6 Acenaphthylene ug/L 5 86 54-16695 10 305<0.50 4.3 4.7 Anthracene ug/L 5 100 49-167114 14 305<0.050 5.0 5.7 Benzo(a)anthracene ug/L 5 96 37-16297 2 305<0.050 4.7 4.8 Benzo(a)pyrene ug/L 5 83 10-19183 1 305<0.10 4.1 4.2 Benzo(b)fluoranthene ug/L 5 85 10-16581 5 305<0.050 4.2 4.0 Benzo(g,h,i)perylene ug/L 5 83 10-15786 4 305<0.20 4.1 4.3 Benzo(k)fluoranthene ug/L 5 123 10-167123 0 305<0.20 6.1 6.1 Chrysene ug/L 5 107 18-160115 8 305<0.10 5.3 5.7 Dibenz(a,h)anthracene ug/L 5 82 10-16485 4 305<0.15 4.0 4.2 Fluoranthene ug/L 5 98 25-192107 9 305<0.30 4.9 5.3 Fluorene ug/L 5 88 50-16398 11 305<0.31 4.3 4.9 Indeno(1,2,3-cd)pyrene ug/L 5 83 10-16282 1 305<0.050 4.1 4.1 Naphthalene ug/L 5 87 49-14792 6 305<1.5 4.3 4.6 Phenanthrene ug/L 5 81 42-15688 9 305<0.20 4.0 4.4 Pyrene ug/L 5 96 44-181106 10 305<0.10 4.8 5.3 2-Fluorobiphenyl (S)%87 40-167106 Nitrobenzene-d5 (S)%117 47-188123 Terphenyl-d14 (S)%122 46-173127 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 12/18/2023 08:16 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 12 of 19 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92703252 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 819495 SM 2540D-2015 SM 2540D-2015 2540D Total Suspended Solids Laboratory:Pace Analytical Services - Asheville Associated Lab Samples:92703252001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4241911 Associated Lab Samples:92703252001 Matrix:Water AnalyzedMDL Total Suspended Solids mg/L <2.5 2.5 12/14/23 16:352.5 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4241912LABORATORY CONTROL SAMPLE: LCSSpike Total Suspended Solids mg/L 238250 95 90-110 Parameter Units Dup Result Max RPD QualifiersRPDResult 92703128001 4242117SAMPLE DUPLICATE: Total Suspended Solids mg/L 235 11 25262 Parameter Units Dup Result Max RPD QualifiersRPDResult 92703199003 4242118SAMPLE DUPLICATE: Total Suspended Solids mg/L 3090 7 253310 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 12/18/2023 08:16 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 13 of 19 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92703252 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 819505 EPA 420.4 Rev 1.0 1993 EPA 420.4 Rev 1.0 1993 420.4 Phenolics Laboratory:Pace Analytical Services - Asheville Associated Lab Samples:92703252001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4241934 Associated Lab Samples:92703252001 Matrix:Water AnalyzedMDL Phenolics, Total Recoverable mg/L <0.020 0.020 12/14/23 12:210.0076 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4241935LABORATORY CONTROL SAMPLE: LCSSpike Phenolics, Total Recoverable mg/L 0.0530.05 106 90-110 Parameter Units MS Result % Rec Limits Qual% RecConc. 4241936MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 35846077009 4241937 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. Phenolics, Total Recoverable mg/L M10.05 88 90-11095 8 100.050.0076U 0.049 0.053 Parameter Units MS Result % Rec Limits Qual% RecConc. 4241938MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 35846077018 4241939 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. Phenolics, Total Recoverable mg/L M10.05 89 90-11089 0 100.050.0076U 0.047 0.048 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 12/18/2023 08:16 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 14 of 19 #=QL# QUALIFIERS Pace Project No.: Project: 92703252 Davie County Law Enforcement DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean-Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as "Total" may vary slightly from the sum of the reported component parameters. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. ANALYTE QUALIFIERS Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery.M1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 12/18/2023 08:16 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 15 of 19 #=CR# QUALITY CONTROL DATA CROSS REFERENCE TABLE Pace Project No.: Project: 92703252 Davie County Law Enforcement Lab ID Sample ID QC Batch Method QC Batch Analytical Method Analytical Batch 92703252001 820296EffluentEPA 1664B 92703252001 819879 820185EffluentEPA 3511 EPA 8270E by SIM 92703252001 819495EffluentSM 2540D-2015 92703252001 819505 819539EffluentEPA 420.4 Rev 1.0 1993 EPA 420.4 Rev 1.0 1993 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 12/18/2023 08:16 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 16 of 19 Page 17 of 19 Page 18 of 19 Page 19 of 19 #=CL# January 17, 2024 LIMS USE: FR - ED HENRIQUES LIMS OBJECT ID: 92707807 92707807 Project: Pace Project No.: RE: Mr. Ed Henriques S&ME, Inc. 8646 West Market Street Suite 105 Greensboro, NC 27409 Davie County Law Enforcement Dear Mr. Henriques: Enclosed are the analytical results for sample(s) received by the laboratory on January 10, 2024. The results relate only to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report. The test results provided in this final report were generated by each of the following laboratories within the Pace Network: • Pace Analytical Services - Asheville • Pace Analytical Services - Charlotte If you have any questions concerning this report, please feel free to contact me. Sincerely, Angela Baioni angela.baioni@pacelabs.com Project Manager 612-473-6801 Enclosures cc:Cody McMechen Cody McMechen, S+ME REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 1 of 25 #=CP# CERTIFICATIONS Pace Project No.: Project: 92707807 Davie County Law Enforcement Pace Analytical Services Charlotte South Carolina Laboratory ID: 99006 9800 Kincey Ave. Ste 100, Huntersville, NC 28078 North Carolina Drinking Water Certification #: 37706 North Carolina Field Services Certification #: 5342 North Carolina Wastewater Certification #: 12 South Carolina Laboratory ID: 99006 South Carolina Certification #: 99006001 South Carolina Drinking Water Cert. #: 99006003 Florida/NELAP Certification #: E87627 Kentucky UST Certification #: 84 Louisiana DoH Drinking Water #: LA029 Virginia/VELAP Certification #: 460221 Pace Analytical Services Asheville 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 South Carolina Laboratory ID: 99030 South Carolina Certification #: 99030001 Virginia/VELAP Certification #: 460222 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 2 of 25 #=SS# SAMPLE SUMMARY Pace Project No.: Project: 92707807 Davie County Law Enforcement Lab ID Sample ID Matrix Date Collected Date Received 92707807001 Effluent Water 01/10/24 09:30 01/10/24 16:50 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 3 of 25 #=SA# SAMPLE ANALYTE COUNT Pace Project No.: Project: 92707807 Davie County Law Enforcement Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 92707807001 Effluent EPA 1664B 1 PASI-CDVR EPA 8270E 74 PASI-CPKS SM 2540D-2015 1 PASI-AJAY EPA 420.4 Rev 1.0 1993 1 PASI-AARJ PASI-A = Pace Analytical Services - Asheville PASI-C = Pace Analytical Services - Charlotte REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 4 of 25 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92707807 Davie County Law Enforcement Method: Client:S&ME - Greensboro EPA 1664B Date:January 17, 2024 Description:HEM, Oil and Grease General Information: 1 sample was analyzed for EPA 1664B by Pace Analytical Services Charlotte. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below. Continuing Calibration: All criteria were within method requirements with any exceptions noted below. Surrogates: All surrogates were within QC limits with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. Duplicate Sample: All duplicate sample results were within method acceptance criteria with any exceptions noted below. Additional Comments: REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 5 of 25 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92707807 Davie County Law Enforcement Method: Client:S&ME - Greensboro EPA 8270E Date:January 17, 2024 Description:8270E RVE General Information: 1 sample was analyzed for EPA 8270E by Pace Analytical Services Charlotte. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Sample Preparation: The samples were prepared in accordance with EPA 3510C with any exceptions noted below. Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below. Continuing Calibration: All criteria were within method requirements with any exceptions noted below. QC Batch: 824952 v1: The continuing calibration verification was above the method acceptance limit. Any detection for the analyte in the associated samples may have a high bias. • Effluent (Lab ID: 92707807001) • 4,6-Dinitro-2-methylphenol • Benzoic Acid • MS (Lab ID: 4267064) • 4,6-Dinitro-2-methylphenol • Benzoic Acid • MSD (Lab ID: 4267065) • 4,6-Dinitro-2-methylphenol • Benzoic Acid Internal Standards: All internal standards were within QC limits with any exceptions noted below. Surrogates: All surrogates were within QC limits with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 6 of 25 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92707807 Davie County Law Enforcement Method: Client:S&ME - Greensboro EPA 8270E Date:January 17, 2024 Description:8270E RVE QC Batch: 824952 A matrix spike and/or matrix spike duplicate (MS/MSD) were performed on the following sample(s): 92707566001 R1: RPD value was outside control limits. • MSD (Lab ID: 4267065) • 1,2-Dichlorobenzene • 1,3-Dichlorobenzene • 1,4-Dichlorobenzene • 2,4,5-Trichlorophenol • 2,4,6-Trichlorophenol • 2,4-Dichlorophenol • 2,4-Dinitrophenol • 2-Chlorophenol • 2-Nitrophenol • 4,6-Dinitro-2-methylphenol • Hexachloroethane • Pentachlorophenol • Phenol Additional Comments: REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 7 of 25 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92707807 Davie County Law Enforcement Method: Client:S&ME - Greensboro SM 2540D-2015 Date:January 17, 2024 Description:2540D Total Suspended Solids General Information: 1 sample was analyzed for SM 2540D-2015 by Pace Analytical Services Asheville. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. Duplicate Sample: All duplicate sample results were within method acceptance criteria with any exceptions noted below. Additional Comments: REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 8 of 25 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92707807 Davie County Law Enforcement Method: Client:S&ME - Greensboro EPA 420.4 Rev 1.0 1993 Date:January 17, 2024 Description:420.4 Phenolics, Total General Information: 1 sample was analyzed for EPA 420.4 Rev 1.0 1993 by Pace Analytical Services Asheville. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Sample Preparation: The samples were prepared in accordance with EPA 420.4 Rev 1.0 1993 with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. QC Batch: 825119 A matrix spike and/or matrix spike duplicate (MS/MSD) were performed on the following sample(s): 92706926001,92707036001 M1: Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. • MS (Lab ID: 4267757) • Phenolics, Total Recoverable • MS (Lab ID: 4267759) • Phenolics, Total Recoverable • MSD (Lab ID: 4267758) • Phenolics, Total Recoverable • MSD (Lab ID: 4267760) • Phenolics, Total Recoverable Additional Comments: This data package has been reviewed for quality and completeness and is approved for release. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 9 of 25 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92707807 Davie County Law Enforcement Sample:Effluent Lab ID:92707807001 Collected:01/10/24 09:30 Received:01/10/24 16:50 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: EPA 1664B Pace Analytical Services - Charlotte HEM, Oil and Grease Oil and Grease <4.8 mg/L 01/16/24 19:164.8 1.1 1 Analytical Method: EPA 8270E Preparation Method: EPA 3510C Pace Analytical Services - Charlotte 8270E RVE Acenaphthene <8.3 ug/L 01/12/24 12:37 83-32-901/12/24 01:578.3 1.7 1 Acenaphthylene <8.3 ug/L 01/12/24 12:37 208-96-801/12/24 01:578.3 1.6 1 Aniline <8.3 ug/L 01/12/24 12:37 62-53-301/12/24 01:578.3 1.4 1 Anthracene <8.3 ug/L 01/12/24 12:37 120-12-701/12/24 01:578.3 1.9 1 Benzo(a)anthracene <8.3 ug/L 01/12/24 12:37 56-55-301/12/24 01:578.3 2.2 1 Benzo(a)pyrene <8.3 ug/L 01/12/24 12:37 50-32-801/12/24 01:578.3 2.3 1 Benzo(b)fluoranthene <8.3 ug/L 01/12/24 12:37 205-99-201/12/24 01:578.3 2.2 1 Benzo(g,h,i)perylene <8.3 ug/L 01/12/24 12:37 191-24-201/12/24 01:578.3 2.4 1 Benzo(k)fluoranthene <8.3 ug/L 01/12/24 12:37 207-08-901/12/24 01:578.3 2.3 1 Benzoic Acid <41.7 ug/L 01/12/24 12:37 65-85-0 v101/12/24 01:5741.7 18.3 1 Benzyl alcohol <16.7 ug/L 01/12/24 12:37 100-51-601/12/24 01:5716.7 2.4 1 4-Bromophenylphenyl ether <8.3 ug/L 01/12/24 12:37 101-55-301/12/24 01:578.3 1.5 1 Butylbenzylphthalate <8.3 ug/L 01/12/24 12:37 85-68-701/12/24 01:578.3 2.6 1 4-Chloro-3-methylphenol <8.3 ug/L 01/12/24 12:37 59-50-701/12/24 01:578.3 2.8 1 4-Chloroaniline <16.7 ug/L 01/12/24 12:37 106-47-801/12/24 01:5716.7 3.0 1 bis(2-Chloroethoxy)methane <8.3 ug/L 01/12/24 12:37 111-91-101/12/24 01:578.3 1.5 1 bis(2-Chloroethyl) ether <8.3 ug/L 01/12/24 12:37 111-44-401/12/24 01:578.3 1.6 1 2-Chloronaphthalene <8.3 ug/L 01/12/24 12:37 91-58-701/12/24 01:578.3 1.4 1 2-Chlorophenol <8.3 ug/L 01/12/24 12:37 95-57-801/12/24 01:578.3 1.0 1 4-Chlorophenylphenyl ether <8.3 ug/L 01/12/24 12:37 7005-72-301/12/24 01:578.3 1.7 1 Chrysene <8.3 ug/L 01/12/24 12:37 218-01-901/12/24 01:578.3 2.3 1 Dibenz(a,h)anthracene <8.3 ug/L 01/12/24 12:37 53-70-301/12/24 01:578.3 2.5 1 Dibenzofuran <8.3 ug/L 01/12/24 12:37 132-64-901/12/24 01:578.3 1.8 1 1,2-Dichlorobenzene <8.3 ug/L 01/12/24 12:37 95-50-101/12/24 01:578.3 1.5 1 1,3-Dichlorobenzene <8.3 ug/L 01/12/24 12:37 541-73-101/12/24 01:578.3 1.3 1 1,4-Dichlorobenzene <8.3 ug/L 01/12/24 12:37 106-46-701/12/24 01:578.3 1.4 1 3,3'-Dichlorobenzidine <16.7 ug/L 01/12/24 12:37 91-94-101/12/24 01:5716.7 6.8 1 2,4-Dichlorophenol <8.3 ug/L 01/12/24 12:37 120-83-201/12/24 01:578.3 1.2 1 Diethylphthalate <8.3 ug/L 01/12/24 12:37 84-66-201/12/24 01:578.3 1.7 1 2,4-Dimethylphenol <8.3 ug/L 01/12/24 12:37 105-67-901/12/24 01:578.3 1.4 1 Dimethylphthalate <8.3 ug/L 01/12/24 12:37 131-11-301/12/24 01:578.3 1.8 1 Di-n-butylphthalate <8.3 ug/L 01/12/24 12:37 84-74-201/12/24 01:578.3 1.8 1 4,6-Dinitro-2-methylphenol <16.7 ug/L 01/12/24 12:37 534-52-1 v101/12/24 01:5716.7 6.5 1 2,4-Dinitrophenol <41.7 ug/L 01/12/24 12:37 51-28-501/12/24 01:5741.7 21.7 1 2,4-Dinitrotoluene <8.3 ug/L 01/12/24 12:37 121-14-201/12/24 01:578.3 1.4 1 2,6-Dinitrotoluene <8.3 ug/L 01/12/24 12:37 606-20-201/12/24 01:578.3 1.4 1 Di-n-octylphthalate <8.3 ug/L 01/12/24 12:37 117-84-001/12/24 01:578.3 3.3 1 bis(2-Ethylhexyl)phthalate <5.0 ug/L 01/12/24 12:37 117-81-701/12/24 01:575.0 3.1 1 Fluoranthene <8.3 ug/L 01/12/24 12:37 206-44-001/12/24 01:578.3 1.8 1 Fluorene <8.3 ug/L 01/12/24 12:37 86-73-701/12/24 01:578.3 1.7 1 Hexachloro-1,3-butadiene <8.3 ug/L 01/12/24 12:37 87-68-301/12/24 01:578.3 1.5 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 10 of 25 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92707807 Davie County Law Enforcement Sample:Effluent Lab ID:92707807001 Collected:01/10/24 09:30 Received:01/10/24 16:50 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: EPA 8270E Preparation Method: EPA 3510C Pace Analytical Services - Charlotte 8270E RVE Hexachlorobenzene <8.3 ug/L 01/12/24 12:37 118-74-101/12/24 01:578.3 1.8 1 Hexachlorocyclopentadiene <8.3 ug/L 01/12/24 12:37 77-47-401/12/24 01:578.3 1.3 1 Hexachloroethane <8.3 ug/L 01/12/24 12:37 67-72-101/12/24 01:578.3 1.2 1 Indeno(1,2,3-cd)pyrene <8.3 ug/L 01/12/24 12:37 193-39-501/12/24 01:578.3 2.4 1 Isophorone <8.3 ug/L 01/12/24 12:37 78-59-101/12/24 01:578.3 1.4 1 1-Methylnaphthalene <8.3 ug/L 01/12/24 12:37 90-12-001/12/24 01:578.3 1.7 1 2-Methylnaphthalene <8.3 ug/L 01/12/24 12:37 91-57-601/12/24 01:578.3 1.6 1 2-Methylphenol(o-Cresol)<8.3 ug/L 01/12/24 12:37 95-48-701/12/24 01:578.3 1.6 1 3&4-Methylphenol(m&p Cresol)<8.3 ug/L 01/12/24 12:37 15831-10-401/12/24 01:578.3 1.0 1 Naphthalene <8.3 ug/L 01/12/24 12:37 91-20-301/12/24 01:578.3 1.7 1 2-Nitroaniline <16.7 ug/L 01/12/24 12:37 88-74-401/12/24 01:5716.7 2.5 1 3-Nitroaniline <16.7 ug/L 01/12/24 12:37 99-09-201/12/24 01:5716.7 3.1 1 4-Nitroaniline <16.7 ug/L 01/12/24 12:37 100-01-601/12/24 01:5716.7 4.2 1 Nitrobenzene <8.3 ug/L 01/12/24 12:37 98-95-301/12/24 01:578.3 1.6 1 2-Nitrophenol <8.3 ug/L 01/12/24 12:37 88-75-501/12/24 01:578.3 1.2 1 4-Nitrophenol <41.7 ug/L 01/12/24 12:37 100-02-701/12/24 01:5741.7 5.5 1 N-Nitrosodimethylamine <8.3 ug/L 01/12/24 12:37 62-75-901/12/24 01:578.3 1.6 1 N-Nitroso-di-n-propylamine <8.3 ug/L 01/12/24 12:37 621-64-701/12/24 01:578.3 1.1 1 N-Nitrosodiphenylamine <8.3 ug/L 01/12/24 12:37 86-30-601/12/24 01:578.3 2.5 1 2,2'-Oxybis(1-chloropropane)<8.3 ug/L 01/12/24 12:37 108-60-101/12/24 01:578.3 0.96 1 Pentachlorophenol <16.7 ug/L 01/12/24 12:37 87-86-501/12/24 01:5716.7 3.1 1 Phenanthrene <8.3 ug/L 01/12/24 12:37 85-01-801/12/24 01:578.3 1.7 1 Phenol <8.3 ug/L 01/12/24 12:37 108-95-201/12/24 01:578.3 1.1 1 Pyrene <8.3 ug/L 01/12/24 12:37 129-00-001/12/24 01:578.3 1.8 1 1,2,4-Trichlorobenzene <8.3 ug/L 01/12/24 12:37 120-82-101/12/24 01:578.3 1.4 1 2,4,5-Trichlorophenol <8.3 ug/L 01/12/24 12:37 95-95-401/12/24 01:578.3 1.2 1 2,4,6-Trichlorophenol <8.3 ug/L 01/12/24 12:37 88-06-201/12/24 01:578.3 1.3 1 Surrogates Nitrobenzene-d5 (S)101 %01/12/24 12:37 4165-60-001/12/24 01:5710-133 1 2-Fluorobiphenyl (S)93 %01/12/24 12:37 321-60-801/12/24 01:5710-130 1 Terphenyl-d14 (S)119 %01/12/24 12:37 1718-51-001/12/24 01:5710-193 1 Phenol-d6 (S)57 %01/12/24 12:37 13127-88-301/12/24 01:5710-130 1 2-Fluorophenol (S)69 %01/12/24 12:37 367-12-401/12/24 01:5710-130 1 2,4,6-Tribromophenol (S)109 %01/12/24 12:37 118-79-601/12/24 01:5710-166 1 Analytical Method: SM 2540D-2015 Pace Analytical Services - Asheville 2540D Total Suspended Solids Total Suspended Solids 12.3 mg/L 01/15/24 12:182.5 2.5 1 Analytical Method: EPA 420.4 Rev 1.0 1993 Preparation Method: EPA 420.4 Rev 1.0 1993 Pace Analytical Services - Asheville 420.4 Phenolics, Total Phenolics, Total Recoverable <0.020 mg/L 01/12/24 14:27 64743-03-901/12/24 11:040.020 0.0076 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 11 of 25 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92707807 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 825779 EPA 1664B EPA 1664B 1664 HEM, Oil and Grease Laboratory:Pace Analytical Services - Charlotte Associated Lab Samples:92707807001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4270696 Associated Lab Samples:92707807001 Matrix:Water AnalyzedMDL Oil and Grease mg/L <5.0 5.0 01/16/24 19:151.1 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4270697LABORATORY CONTROL SAMPLE: LCSSpike Oil and Grease mg/L 32.440 81 78-114 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 4270698MATRIX SPIKE SAMPLE: MSSpike Result 92707807001 Oil and Grease mg/L 31.238.5 81 78-114<4.8 Parameter Units Dup Result Max RPD QualifiersRPDResult 92707973001 4270699SAMPLE DUPLICATE: Oil and Grease mg/L <5.0 30ND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 12 of 25 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92707807 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 824952 EPA 3510C EPA 8270E 8270E Water MSSV RVE Laboratory:Pace Analytical Services - Charlotte Associated Lab Samples:92707807001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4267062 Associated Lab Samples:92707807001 Matrix:Water AnalyzedMDL 1,2,4-Trichlorobenzene ug/L <10.0 10.0 01/12/24 09:351.7 1,2-Dichlorobenzene ug/L <10.0 10.0 01/12/24 09:351.8 1,3-Dichlorobenzene ug/L <10.0 10.0 01/12/24 09:351.6 1,4-Dichlorobenzene ug/L <10.0 10.0 01/12/24 09:351.7 1-Methylnaphthalene ug/L <10.0 10.0 01/12/24 09:352.0 2,2'-Oxybis(1-chloropropane)ug/L <10.0 10.0 01/12/24 09:351.2 2,4,5-Trichlorophenol ug/L <10.0 10.0 01/12/24 09:351.4 2,4,6-Trichlorophenol ug/L <10.0 10.0 01/12/24 09:351.6 2,4-Dichlorophenol ug/L <10.0 10.0 01/12/24 09:351.4 2,4-Dimethylphenol ug/L <10.0 10.0 01/12/24 09:351.7 2,4-Dinitrophenol ug/L <50.0 50.0 01/12/24 09:3526.0 2,4-Dinitrotoluene ug/L <10.0 10.0 01/12/24 09:351.6 2,6-Dinitrotoluene ug/L <10.0 10.0 01/12/24 09:351.7 2-Chloronaphthalene ug/L <10.0 10.0 01/12/24 09:351.7 2-Chlorophenol ug/L <10.0 10.0 01/12/24 09:351.2 2-Methylnaphthalene ug/L <10.0 10.0 01/12/24 09:351.9 2-Methylphenol(o-Cresol)ug/L <10.0 10.0 01/12/24 09:351.9 2-Nitroaniline ug/L <20.0 20.0 01/12/24 09:353.0 2-Nitrophenol ug/L <10.0 10.0 01/12/24 09:351.4 3&4-Methylphenol(m&p Cresol)ug/L <10.0 10.0 01/12/24 09:351.2 3,3'-Dichlorobenzidine ug/L <20.0 20.0 01/12/24 09:358.1 3-Nitroaniline ug/L <20.0 20.0 01/12/24 09:353.8 4,6-Dinitro-2-methylphenol ug/L <20.0 20.0 01/12/24 09:357.8 4-Bromophenylphenyl ether ug/L <10.0 10.0 01/12/24 09:351.8 4-Chloro-3-methylphenol ug/L <10.0 10.0 01/12/24 09:353.3 4-Chloroaniline ug/L <20.0 20.0 01/12/24 09:353.6 4-Chlorophenylphenyl ether ug/L <10.0 10.0 01/12/24 09:352.0 4-Nitroaniline ug/L <20.0 20.0 01/12/24 09:355.1 4-Nitrophenol ug/L <50.0 50.0 01/12/24 09:356.6 Acenaphthene ug/L <10.0 10.0 01/12/24 09:352.0 Acenaphthylene ug/L <10.0 10.0 01/12/24 09:352.0 Aniline ug/L <10.0 10.0 01/12/24 09:351.6 Anthracene ug/L <10.0 10.0 01/12/24 09:352.3 Benzo(a)anthracene ug/L <10.0 10.0 01/12/24 09:352.7 Benzo(a)pyrene ug/L <10.0 10.0 01/12/24 09:352.8 Benzo(b)fluoranthene ug/L <10.0 10.0 01/12/24 09:352.6 Benzo(g,h,i)perylene ug/L <10.0 10.0 01/12/24 09:352.8 Benzo(k)fluoranthene ug/L <10.0 10.0 01/12/24 09:352.7 Benzoic Acid ug/L <50.0 50.0 01/12/24 09:3522.0 Benzyl alcohol ug/L <20.0 20.0 01/12/24 09:352.9 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 13 of 25 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92707807 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4267062 Associated Lab Samples:92707807001 Matrix:Water AnalyzedMDL bis(2-Chloroethoxy)methane ug/L <10.0 10.0 01/12/24 09:351.8 bis(2-Chloroethyl) ether ug/L <10.0 10.0 01/12/24 09:351.9 bis(2-Ethylhexyl)phthalate ug/L <6.0 6.0 01/12/24 09:353.7 Butylbenzylphthalate ug/L <10.0 10.0 01/12/24 09:353.1 Chrysene ug/L <10.0 10.0 01/12/24 09:352.8 Di-n-butylphthalate ug/L <10.0 10.0 01/12/24 09:352.2 Di-n-octylphthalate ug/L <10.0 10.0 01/12/24 09:353.9 Dibenz(a,h)anthracene ug/L <10.0 10.0 01/12/24 09:353.0 Dibenzofuran ug/L <10.0 10.0 01/12/24 09:352.1 Diethylphthalate ug/L <10.0 10.0 01/12/24 09:352.0 Dimethylphthalate ug/L <10.0 10.0 01/12/24 09:352.1 Fluoranthene ug/L <10.0 10.0 01/12/24 09:352.2 Fluorene ug/L <10.0 10.0 01/12/24 09:352.1 Hexachloro-1,3-butadiene ug/L <10.0 10.0 01/12/24 09:351.8 Hexachlorobenzene ug/L <10.0 10.0 01/12/24 09:352.2 Hexachlorocyclopentadiene ug/L <10.0 10.0 01/12/24 09:351.6 Hexachloroethane ug/L <10.0 10.0 01/12/24 09:351.4 Indeno(1,2,3-cd)pyrene ug/L <10.0 10.0 01/12/24 09:352.9 Isophorone ug/L <10.0 10.0 01/12/24 09:351.7 N-Nitroso-di-n-propylamine ug/L <10.0 10.0 01/12/24 09:351.3 N-Nitrosodimethylamine ug/L <10.0 10.0 01/12/24 09:351.9 N-Nitrosodiphenylamine ug/L <10.0 10.0 01/12/24 09:353.0 Naphthalene ug/L <10.0 10.0 01/12/24 09:352.1 Nitrobenzene ug/L <10.0 10.0 01/12/24 09:351.9 Pentachlorophenol ug/L <20.0 20.0 01/12/24 09:353.8 Phenanthrene ug/L <10.0 10.0 01/12/24 09:352.0 Phenol ug/L <10.0 10.0 01/12/24 09:351.4 Pyrene ug/L <10.0 10.0 01/12/24 09:352.2 2,4,6-Tribromophenol (S)%113 10-166 01/12/24 09:35 2-Fluorobiphenyl (S)%80 10-130 01/12/24 09:35 2-Fluorophenol (S)%72 10-130 01/12/24 09:35 Nitrobenzene-d5 (S)%89 10-133 01/12/24 09:35 Phenol-d6 (S)%58 10-130 01/12/24 09:35 Terphenyl-d14 (S)%135 10-193 01/12/24 09:35 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4267063LABORATORY CONTROL SAMPLE: LCSSpike 1,2,4-Trichlorobenzene ug/L 339500 68 14-130 1,2-Dichlorobenzene ug/L 248500 50 10-130 1,3-Dichlorobenzene ug/L 218500 44 10-130 1,4-Dichlorobenzene ug/L 221500 44 10-130 1-Methylnaphthalene ug/L 393500 79 26-131 2,2'-Oxybis(1-chloropropane)ug/L 382500 76 23-130 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 14 of 25 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92707807 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4267063LABORATORY CONTROL SAMPLE: LCSSpike 2,4,5-Trichlorophenol ug/L 437500 87 36-150 2,4,6-Trichlorophenol ug/L 413500 83 30-151 2,4-Dichlorophenol ug/L 404500 81 36-140 2,4-Dimethylphenol ug/L 440500 88 36-155 2,4-Dinitrophenol ug/L 20002500 80 10-169 2,4-Dinitrotoluene ug/L 513500 103 46-160 2,6-Dinitrotoluene ug/L 475500 95 47-161 2-Chloronaphthalene ug/L 405500 81 29-134 2-Chlorophenol ug/L 409500 82 29-130 2-Methylnaphthalene ug/L 400500 80 26-130 2-Methylphenol(o-Cresol)ug/L 396500 79 32-130 2-Nitroaniline ug/L 8921000 89 41-150 2-Nitrophenol ug/L 421500 84 31-145 3&4-Methylphenol(m&p Cresol)ug/L 377500 75 29-130 3,3'-Dichlorobenzidine ug/L 10301000 103 46-153 3-Nitroaniline ug/L 9581000 96 47-156 4,6-Dinitro-2-methylphenol ug/L 9331000 93 23-161 4-Bromophenylphenyl ether ug/L 467500 93 45-143 4-Chloro-3-methylphenol ug/L 8091000 81 42-143 4-Chloroaniline ug/L 8171000 82 37-135 4-Chlorophenylphenyl ether ug/L 423500 85 43-140 4-Nitroaniline ug/L 10801000 108 47-157 4-Nitrophenol ug/L 14102500 56 10-130 Acenaphthene ug/L 399500 80 38-138 Acenaphthylene ug/L 406500 81 39-139 Aniline ug/L 325500 65 16-130 Anthracene ug/L 481500 96 45-136 Benzo(a)anthracene ug/L 531500 106 52-151 Benzo(a)pyrene ug/L 549500 110 46-165 Benzo(b)fluoranthene ug/L 547500 109 44-170 Benzo(g,h,i)perylene ug/L 538500 108 39-171 Benzo(k)fluoranthene ug/L 555500 111 43-168 Benzoic Acid ug/L 10102500 40 10-130 Benzyl alcohol ug/L 8661000 87 33-134 bis(2-Chloroethoxy)methane ug/L 437500 87 37-140 bis(2-Chloroethyl) ether ug/L 415500 83 33-136 bis(2-Ethylhexyl)phthalate ug/L 596500 119 50-169 Butylbenzylphthalate ug/L 582500 116 50-174 Chrysene ug/L 510500 102 52-148 Di-n-butylphthalate ug/L 575500 115 51-154 Di-n-octylphthalate ug/L 574500 115 44-170 Dibenz(a,h)anthracene ug/L 518500 104 41-171 Dibenzofuran ug/L 416500 83 42-157 Diethylphthalate ug/L 475500 95 50-149 Dimethylphthalate ug/L 437500 87 47-146 Fluoranthene ug/L 529500 106 51-152 Fluorene ug/L 408500 82 46-143 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 15 of 25 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92707807 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4267063LABORATORY CONTROL SAMPLE: LCSSpike Hexachloro-1,3-butadiene ug/L 310500 62 10-130 Hexachlorobenzene ug/L 470500 94 40-139 Hexachlorocyclopentadiene ug/L 393500 79 10-130 Hexachloroethane ug/L 211500 42 10-130 Indeno(1,2,3-cd)pyrene ug/L 514500 103 40-172 Isophorone ug/L 413500 83 37-143 N-Nitroso-di-n-propylamine ug/L 447500 89 38-145 N-Nitrosodimethylamine ug/L 367500 73 30-130 N-Nitrosodiphenylamine ug/L 479500 96 46-144 Naphthalene ug/L 363500 73 21-130 Nitrobenzene ug/L 409500 82 33-136 Pentachlorophenol ug/L 9041000 90 19-156 Phenanthrene ug/L 495500 99 49-143 Phenol ug/L 285500 57 18-130 Pyrene ug/L 530500 106 48-156 2,4,6-Tribromophenol (S)%104 10-166 2-Fluorobiphenyl (S)%74 10-130 2-Fluorophenol (S)%64 10-130 Nitrobenzene-d5 (S)%84 10-133 Phenol-d6 (S)%52 10-130 Terphenyl-d14 (S)%113 10-193 Parameter Units MS Result % Rec Limits Qual% RecConc. 4267064MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92707566001 4267065 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. 1,2,4-Trichlorobenzene ug/L 100 57 10-13068 18 30100ND56.9 68.1 1,2-Dichlorobenzene ug/L R11003210-13047 36 30100ND32.4 46.5 1,3-Dichlorobenzene ug/L R11002610-13040 44 30100ND25.8 40.3 1,4-Dichlorobenzene ug/L R11002710-13042 41 30100ND27.3 41.5 1-Methylnaphthalene ug/L 100 81 10-13091 11 30100ND81.5 91.3 2,2'-Oxybis(1- chloropropane) ug/L 100 59 10-13268 15 30100ND58.8 68.3 2,4,5-Trichlorophenol ug/L R11003010-17489 100 30100ND29.5 89.2 2,4,6-Trichlorophenol ug/L R11002210-17385 119 30100ND21.7 85.0 2,4-Dichlorophenol ug/L R11003710-15394 87 30100ND37.0 93.9 2,4-Dimethylphenol ug/L 100 89 12-157101 13 30100ND88.9 101 2,4-Dinitrophenol ug/L R15002010-16584 122 30500ND101418 2,4-Dinitrotoluene ug/L 100 99 29-168106 7 30100ND98.8 106 2,6-Dinitrotoluene ug/L 100 91 28-168100 10 30100ND91.0 100 2-Chloronaphthalene ug/L 100 73 11-13680 10 30100ND72.7 80.2 2-Chlorophenol ug/L R11003510-13483 83 30100ND34.6 83.3 2-Methylnaphthalene ug/L 100 81 10-13190 11 30100ND80.8 90.2 2-Methylphenol(o-Cresol)ug/L 100 71 10-13084 16 30100ND71.5 84.2 2-Nitroaniline ug/L 200 68 19-15676 10 30200ND137151 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 16 of 25 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92707807 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units MS Result % Rec Limits Qual% RecConc. 4267064MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92707566001 4267065 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. 2-Nitrophenol ug/L R11003010-16092 101 30100ND30.3 91.7 3&4-Methylphenol(m&p Cresol)ug/L 100 62 10-13280 25 30100ND62.4 79.9 3,3'-Dichlorobenzidine ug/L 200 96 10-173100 4 30200ND192201 3-Nitroaniline ug/L 200 87 19-16996 10 30200ND174191 4,6-Dinitro-2-methylphenol ug/L R1,v12002610-178104 119 30200ND52.7 209 4-Bromophenylphenyl ether ug/L 100 91 28-149102 11 30100ND91.2 102 4-Chloro-3-methylphenol ug/L 200 79 18-148101 24 30200ND158202 4-Chloroaniline ug/L 200 83 10-14187 5 30200ND166175 4-Chlorophenylphenyl ether ug/L 100 92 24-14499 8 30100ND91.9 99.1 4-Nitroaniline ug/L 200 93 18-17099 6 30200ND186198 4-Nitrophenol ug/L 500 12 10-13050 30500ND<100 252 Acenaphthene ug/L 100 78 18-14286 9 30100ND78.3 85.6 Acenaphthylene ug/L 100 78 18-14385 9 30100ND77.8 85.3 Aniline ug/L 100 66 10-13067 1 30100ND66.4 66.8 Anthracene ug/L 100 89 32-13897 9 30100ND88.6 97.2 Benzo(a)anthracene ug/L 100 96 41-155104 8 30100ND95.5 104 Benzo(a)pyrene ug/L 100 98 10-167107 8 30100ND98.4 107 Benzo(b)fluoranthene ug/L 100 99 31-172109 10 30100ND98.8 109 Benzo(g,h,i)perylene ug/L 100 103 26-177112 8 30100ND103112 Benzo(k)fluoranthene ug/L 100 97 31-168106 9 30100ND97.1 106 Benzoic Acid ug/L v15001010-13042 30500ND<100 209 Benzyl alcohol ug/L 200 80 10-13690 12 30200ND160180 bis(2- Chloroethoxy)methane ug/L 100 84 12-14395 12 30100ND84.4 95.3 bis(2-Chloroethyl) ether ug/L 100 75 10-13987 14 30100ND75.3 86.7 bis(2-Ethylhexyl)phthalate ug/L 100 102 41-173112 9 30100ND102112 Butylbenzylphthalate ug/L 100 91 38-182102 11 30100ND96.2 107 Chrysene ug/L 100 97 41-152104 7 30100ND97.2 104 Di-n-butylphthalate ug/L 100 99 37-162108 9 30100ND98.9 108 Di-n-octylphthalate ug/L 100 97 36-176107 10 30100ND97.2 107 Dibenz(a,h)anthracene ug/L 100 102 29-175111 8 30100ND102111 Dibenzofuran ug/L 100 83 23-14491 9 30100ND83.4 90.9 Diethylphthalate ug/L 100 93 33-15499 6 30100ND93.3 98.7 Dimethylphthalate ug/L 100 90 29-15096 7 30100ND89.6 96.4 Fluoranthene ug/L 100 100 40-156108 7 30100ND100108 Fluorene ug/L 100 85 26-14892 7 30100ND85.4 92.0 Hexachloro-1,3-butadiene ug/L 100 45 10-13059 28 30100ND45.0 59.5 Hexachlorobenzene ug/L 100 91 27-14597 7 30100ND90.7 96.9 Hexachlorocyclopentadiene ug/L 100 54 10-13063 15 30100ND54.1 62.9 Hexachloroethane ug/L R11002310-13035 41 30100ND23.4 35.5 Indeno(1,2,3-cd)pyrene ug/L 100 100 28-176109 9 30100ND99.6 109 Isophorone ug/L 100 86 14-14599 14 30100ND85.9 98.6 N-Nitroso-di-n-propylamine ug/L 100 83 12-14994 13 30100ND83.0 94.2 N-Nitrosodimethylamine ug/L 100 63 10-13070 11 30100ND63.1 70.1 N-Nitrosodiphenylamine ug/L 100 86 29-14994 9 30100ND86.0 94.4 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 17 of 25 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92707807 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units MS Result % Rec Limits Qual% RecConc. 4267064MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92707566001 4267065 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. Naphthalene ug/L 100 64 10-13075 16 30100ND64.3 75.5 Nitrobenzene ug/L 100 73 10-14583 12 30100ND73.3 82.7 Pentachlorophenol ug/L R12002310-17894 121 30200ND46.6 189 Phenanthrene ug/L 100 90 36-14698 8 30100ND90.1 97.6 Phenol ug/L R11003510-13060 51 30100ND35.5 60.0 Pyrene ug/L 100 91 42-156100 9 30100ND90.9 99.5 2,4,6-Tribromophenol (S)%38 10-166108 2-Fluorobiphenyl (S)%76 10-13083 2-Fluorophenol (S)%19 10-13066 Nitrobenzene-d5 (S)%80 10-13390 Phenol-d6 (S)%32 10-13057 Terphenyl-d14 (S)%105 10-193109 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 18 of 25 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92707807 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 825500 SM 2540D-2015 SM 2540D-2015 2540D Total Suspended Solids Laboratory:Pace Analytical Services - Asheville Associated Lab Samples:92707807001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4269567 Associated Lab Samples:92707807001 Matrix:Water AnalyzedMDL Total Suspended Solids mg/L <2.5 2.5 01/15/24 12:092.5 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4269568LABORATORY CONTROL SAMPLE: LCSSpike Total Suspended Solids mg/L 236250 95 90-110 Parameter Units Dup Result Max RPD QualifiersRPDResult 92707471003 4269628SAMPLE DUPLICATE: Total Suspended Solids mg/L 218 5 25228 Parameter Units Dup Result Max RPD QualifiersRPDResult 92707983001 4269629SAMPLE DUPLICATE: Total Suspended Solids mg/L 1050 12 251180 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 19 of 25 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92707807 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 825119 EPA 420.4 Rev 1.0 1993 EPA 420.4 Rev 1.0 1993 420.4 Phenolics Laboratory:Pace Analytical Services - Asheville Associated Lab Samples:92707807001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4267755 Associated Lab Samples:92707807001 Matrix:Water AnalyzedMDL Phenolics, Total Recoverable mg/L <0.020 0.020 01/12/24 13:580.0076 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4267756LABORATORY CONTROL SAMPLE: LCSSpike Phenolics, Total Recoverable mg/L 0.0510.05 103 90-110 Parameter Units MS Result % Rec Limits Qual% RecConc. 4267757MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92706926001 4267758 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. Phenolics, Total Recoverable mg/L M10.05 65 90-11059 3 100.050.065 0.097 0.094 Parameter Units MS Result % Rec Limits Qual% RecConc. 4267759MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92707036001 4267760 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. Phenolics, Total Recoverable mg/L M10.05 70 90-11063 3 100.050.068 0.10 0.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 20 of 25 #=QL# QUALIFIERS Pace Project No.: Project: 92707807 Davie County Law Enforcement DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean-Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as "Total" may vary slightly from the sum of the reported component parameters. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. ANALYTE QUALIFIERS Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery.M1 RPD value was outside control limits.R1 The continuing calibration verification was above the method acceptance limit. Any detection for the analyte in the associated samples may have a high bias.v1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 21 of 25 #=CR# QUALITY CONTROL DATA CROSS REFERENCE TABLE Pace Project No.: Project: 92707807 Davie County Law Enforcement Lab ID Sample ID QC Batch Method QC Batch Analytical Method Analytical Batch 92707807001 825779EffluentEPA 1664B 92707807001 824952 825081EffluentEPA 3510C EPA 8270E 92707807001 825500EffluentSM 2540D-2015 92707807001 825119 825155EffluentEPA 420.4 Rev 1.0 1993 EPA 420.4 Rev 1.0 1993 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 01/17/2024 07:13 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 22 of 25 Page 23 of 25 Page 24 of 25 Page 25 of 25 #=CL# May 02, 2024 LIMS USE: FR - ED HENRIQUES LIMS OBJECT ID: 92726959 92726959 Project: Pace Project No.: RE: Mr. Ed Henriques S&ME, Inc. 8646 West Market Street Suite 105 Greensboro, NC 27409 Davie County Law Enforcement Dear Mr. Henriques: Enclosed are the analytical results for sample(s) received by the laboratory on April 24, 2024. The results relate only to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report. The test results provided in this final report were generated by each of the following laboratories within the Pace Network: • Pace Analytical Services - Asheville • Pace Analytical Services - Charlotte • Pace Analytical Services - Eden If you have any questions concerning this report, please feel free to contact me. Sincerely, Nicole D'Oleo nicole.doleo@pacelabs.com Project Manager (704) 875-9092 Enclosures cc:Cody McMechen Cody McMechen, S+ME REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 1 of 19 #=CP# CERTIFICATIONS Pace Project No.: Project: 92726959 Davie County Law Enforcement Pace Analytical Services Charlotte South Carolina Laboratory ID: 99006 9800 Kincey Ave. Ste 100, Huntersville, NC 28078 North Carolina Drinking Water Certification #: 37706 North Carolina Field Services Certification #: 5342 North Carolina Wastewater Certification #: 12 South Carolina Laboratory ID: 99006 South Carolina Certification #: 99006001 South Carolina Drinking Water Cert. #: 99006003 Florida/NELAP Certification #: E87627 Kentucky UST Certification #: 84 Louisiana DoH Drinking Water #: LA029 Virginia/VELAP Certification #: 460221 Pace Analytical Services Asheville 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 South Carolina Laboratory ID: 99030 South Carolina Certification #: 99030001 Virginia/VELAP Certification #: 460222 Pace Analytical Services Eden 205 East Meadow Road Suite A, Eden, NC 27288 North Carolina Drinking Water Certification #: 37738 North Carolina Wastewater Certification #: 633 Virginia/VELAP Certification #: 460025 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 2 of 19 #=SS# SAMPLE SUMMARY Pace Project No.: Project: 92726959 Davie County Law Enforcement Lab ID Sample ID Matrix Date Collected Date Received 92726959001 Effluent Water 04/24/24 09:00 04/24/24 14:45 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 3 of 19 #=SA# SAMPLE ANALYTE COUNT Pace Project No.: Project: 92726959 Davie County Law Enforcement Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 92726959001 Effluent SM 2540D-2015 1 PASI-EVLG EPA 1664B 1 PASI-CYY EPA 8270E by SIM 21 PASI-CSEM EPA 420.4 Rev 1.0 1993 1 PASI-AARJ PASI-A = Pace Analytical Services - Asheville PASI-C = Pace Analytical Services - Charlotte PASI-E = Pace Analytical Services - Eden REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 4 of 19 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92726959 Davie County Law Enforcement Method: Client:S&ME - Greensboro SM 2540D-2015 Date:May 02, 2024 Description:2540D Total Suspended Solids General Information: 1 sample was analyzed for SM 2540D-2015 by Pace Analytical Services Eden. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. Duplicate Sample: All duplicate sample results were within method acceptance criteria with any exceptions noted below. Additional Comments: REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 5 of 19 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92726959 Davie County Law Enforcement Method: Client:S&ME - Greensboro EPA 1664B Date:May 02, 2024 Description:HEM, Oil and Grease General Information: 1 sample was analyzed for EPA 1664B by Pace Analytical Services Charlotte. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below. Continuing Calibration: All criteria were within method requirements with any exceptions noted below. Surrogates: All surrogates were within QC limits with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. Duplicate Sample: All duplicate sample results were within method acceptance criteria with any exceptions noted below. Additional Comments: REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 6 of 19 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92726959 Davie County Law Enforcement Method: Client:S&ME - Greensboro EPA 8270E by SIM Date:May 02, 2024 Description:8270E Low Volume PAH SIM General Information: 1 sample was analyzed for EPA 8270E by SIM by Pace Analytical Services Charlotte. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Sample Preparation: The samples were prepared in accordance with EPA 3511 with any exceptions noted below. Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below. Continuing Calibration: All criteria were within method requirements with any exceptions noted below. Internal Standards: All internal standards were within QC limits with any exceptions noted below. Surrogates: All surrogates were within QC limits with any exceptions noted below. QC Batch: 850004 S3: Surrogate recovery exceeded laboratory control limits. Analyte presence below reporting limits in associated sample. • Effluent (Lab ID: 92726959001) • Terphenyl-d14 (S) Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. Additional Comments: REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 7 of 19 #=NA# PROJECT NARRATIVE Pace Project No.: Project: 92726959 Davie County Law Enforcement Method: Client:S&ME - Greensboro EPA 420.4 Rev 1.0 1993 Date:May 02, 2024 Description:420.4 Phenolics, Total General Information: 1 sample was analyzed for EPA 420.4 Rev 1.0 1993 by Pace Analytical Services Asheville. All samples were received in acceptable condition with any exceptions noted below or on the chain-of custody and/or the sample condition upon receipt form (SCUR) attached at the end of this report. Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below. Sample Preparation: The samples were prepared in accordance with EPA 420.4 Rev 1.0 1993 with any exceptions noted below. Method Blank: All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below. Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below. Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. Additional Comments: This data package has been reviewed for quality and completeness and is approved for release. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 8 of 19 #=AR# ANALYTICAL RESULTS Pace Project No.: Project: 92726959 Davie County Law Enforcement Sample:Effluent Lab ID:92726959001 Collected:04/24/24 09:00 Received:04/24/24 14:45 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report Analytical Method: SM 2540D-2015 Pace Analytical Services - Eden 2540D Total Suspended Solids Total Suspended Solids 10.9 mg/L 04/25/24 11:072.5 2.5 1 Analytical Method: EPA 1664B Pace Analytical Services - Charlotte HEM, Oil and Grease Oil and Grease <4.9 mg/L 04/26/24 13:304.9 1.1 1 Analytical Method: EPA 8270E by SIM Preparation Method: EPA 3511 Pace Analytical Services - Charlotte 8270E Low Volume PAH SIM Acenaphthene <0.50 ug/L 04/26/24 12:57 83-32-904/26/24 05:010.50 0.061 1 Acenaphthylene <0.50 ug/L 04/26/24 12:57 208-96-804/26/24 05:010.50 0.027 1 Anthracene <0.050 ug/L 04/26/24 12:57 120-12-704/26/24 05:010.050 0.029 1 Benzo(a)anthracene <0.050 ug/L 04/26/24 12:57 56-55-304/26/24 05:010.050 0.037 1 Benzo(a)pyrene <0.10 ug/L 04/26/24 12:57 50-32-804/26/24 05:010.10 0.043 1 Benzo(b)fluoranthene <0.050 ug/L 04/26/24 12:57 205-99-204/26/24 05:010.050 0.035 1 Benzo(g,h,i)perylene <0.20 ug/L 04/26/24 12:57 191-24-204/26/24 05:010.20 0.031 1 Benzo(k)fluoranthene <0.20 ug/L 04/26/24 12:57 207-08-904/26/24 05:010.20 0.038 1 Chrysene <0.10 ug/L 04/26/24 12:57 218-01-904/26/24 05:010.10 0.032 1 Dibenz(a,h)anthracene <0.15 ug/L 04/26/24 12:57 53-70-304/26/24 05:010.15 0.029 1 Fluoranthene <0.30 ug/L 04/26/24 12:57 206-44-004/26/24 05:010.30 0.045 1 Fluorene <0.31 ug/L 04/26/24 12:57 86-73-704/26/24 05:010.31 0.031 1 Indeno(1,2,3-cd)pyrene <0.050 ug/L 04/26/24 12:57 193-39-504/26/24 05:010.050 0.029 1 1-Methylnaphthalene <0.80 ug/L 04/26/24 12:57 90-12-004/26/24 05:010.80 0.033 1 2-Methylnaphthalene <0.80 ug/L 04/26/24 12:57 91-57-604/26/24 05:010.80 0.037 1 Naphthalene <1.5 ug/L 04/26/24 12:57 91-20-304/26/24 05:011.5 0.064 1 Phenanthrene <0.20 ug/L 04/26/24 12:57 85-01-804/26/24 05:010.20 0.042 1 Pyrene <0.10 ug/L 04/26/24 12:57 129-00-004/26/24 05:010.10 0.054 1 Surrogates Nitrobenzene-d5 (S)168 %04/26/24 12:57 4165-60-004/26/24 05:0147-188 1 2-Fluorobiphenyl (S)128 %04/26/24 12:57 321-60-804/26/24 05:0140-167 1 Terphenyl-d14 (S)174 %04/26/24 12:57 1718-51-0 S304/26/24 05:0146-173 1 Analytical Method: EPA 420.4 Rev 1.0 1993 Preparation Method: EPA 420.4 Rev 1.0 1993 Pace Analytical Services - Asheville 420.4 Phenolics, Total Phenolics, Total Recoverable 0.010 mg/L 05/02/24 15:44 64743-03-905/02/24 11:220.0050 0.0039 1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 05/02/2024 05:17 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 9 of 19 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92726959 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 849777 SM 2540D-2015 SM 2540D-2015 2540D Total Suspended Solids Laboratory:Pace Analytical Services - Eden Associated Lab Samples:92726959001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4386337 Associated Lab Samples:92726959001 Matrix:Water AnalyzedMDL Total Suspended Solids mg/L <2.5 2.5 04/25/24 11:062.5 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4386338LABORATORY CONTROL SAMPLE: LCSSpike Total Suspended Solids mg/L 236250 94 90-110 Parameter Units Dup Result Max RPD QualifiersRPDResult 92726977001 4386339SAMPLE DUPLICATE: Total Suspended Solids mg/L 21.3 14 2524.4 Parameter Units Dup Result Max RPD QualifiersRPDResult 92726779001 4386340SAMPLE DUPLICATE: Total Suspended Solids mg/L 2440 1 252420 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 05/02/2024 05:17 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 10 of 19 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92726959 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 850119 EPA 1664B EPA 1664B 1664 HEM, Oil and Grease Laboratory:Pace Analytical Services - Charlotte Associated Lab Samples:92726959001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4388341 Associated Lab Samples:92726959001 Matrix:Water AnalyzedMDL Oil and Grease mg/L <5.0 5.0 04/26/24 13:301.1 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4388342LABORATORY CONTROL SAMPLE: LCSSpike Oil and Grease mg/L 32.440 81 78-114 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 4388343MATRIX SPIKE SAMPLE: MSSpike Result 35874878002 Oil and Grease mg/L 31.638.5 82 78-1141.1U Parameter Units Dup Result Max RPD QualifiersRPDResult 92726689001 4388344SAMPLE DUPLICATE: Oil and Grease mg/L <4.8 30ND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 05/02/2024 05:17 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 11 of 19 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92726959 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 850004 EPA 3511 EPA 8270E by SIM 8270E 3511 Low Volume PAH SIM Laboratory:Pace Analytical Services - Charlotte Associated Lab Samples:92726959001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4387920 Associated Lab Samples:92726959001 Matrix:Water AnalyzedMDL 1-Methylnaphthalene ug/L <0.80 0.80 04/26/24 07:030.033 2-Methylnaphthalene ug/L <0.80 0.80 04/26/24 07:030.037 Acenaphthene ug/L <0.50 0.50 04/26/24 07:030.061 Acenaphthylene ug/L <0.50 0.50 04/26/24 07:030.027 Anthracene ug/L <0.050 0.050 04/26/24 07:030.029 Benzo(a)anthracene ug/L <0.050 0.050 04/26/24 07:030.037 Benzo(a)pyrene ug/L <0.10 0.10 04/26/24 07:030.043 Benzo(b)fluoranthene ug/L <0.050 0.050 04/26/24 07:030.035 Benzo(g,h,i)perylene ug/L <0.20 0.20 04/26/24 07:030.031 Benzo(k)fluoranthene ug/L <0.20 0.20 04/26/24 07:030.038 Chrysene ug/L <0.10 0.10 04/26/24 07:030.032 Dibenz(a,h)anthracene ug/L <0.15 0.15 04/26/24 07:030.029 Fluoranthene ug/L <0.30 0.30 04/26/24 07:030.045 Fluorene ug/L <0.31 0.31 04/26/24 07:030.031 Indeno(1,2,3-cd)pyrene ug/L <0.050 0.050 04/26/24 07:030.029 Naphthalene ug/L <1.5 1.5 04/26/24 07:030.064 Phenanthrene ug/L <0.20 0.20 04/26/24 07:030.042 Pyrene ug/L <0.10 0.10 04/26/24 07:030.054 2-Fluorobiphenyl (S)%153 40-167 04/26/24 07:03 Nitrobenzene-d5 (S)%149 47-188 04/26/24 07:03 Terphenyl-d14 (S)%144 46-173 04/26/24 07:03 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4387921LABORATORY CONTROL SAMPLE: LCSSpike 1-Methylnaphthalene ug/L 2.42.5 96 70-130 2-Methylnaphthalene ug/L 2.32.5 93 70-130 Acenaphthene ug/L 2.42.5 98 70-130 Acenaphthylene ug/L 2.52.5 100 70-130 Anthracene ug/L 2.62.5 103 70-130 Benzo(a)anthracene ug/L 2.32.5 92 70-130 Benzo(a)pyrene ug/L 2.42.5 97 70-130 Benzo(b)fluoranthene ug/L 2.12.5 83 70-130 Benzo(g,h,i)perylene ug/L 2.62.5 103 70-130 Benzo(k)fluoranthene ug/L 2.32.5 94 70-130 Chrysene ug/L 2.32.5 93 70-130 Dibenz(a,h)anthracene ug/L 2.42.5 95 70-130 Fluoranthene ug/L 2.52.5 100 70-130 Fluorene ug/L 2.22.5 88 70-130 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 05/02/2024 05:17 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 12 of 19 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92726959 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4387921LABORATORY CONTROL SAMPLE: LCSSpike Indeno(1,2,3-cd)pyrene ug/L 2.52.5 99 70-130 Naphthalene ug/L 2.42.5 97 70-130 Phenanthrene ug/L 2.22.5 87 70-130 Pyrene ug/L 2.52.5 102 70-130 2-Fluorobiphenyl (S)%143 40-167 Nitrobenzene-d5 (S)%178 47-188 Terphenyl-d14 (S)%140 46-173 Parameter Units MS Result % Rec Limits Qual% RecConc. 4387922MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92726959001 4387923 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. 1-Methylnaphthalene ug/L 2.5 96 46-15993 2 302.5<0.80 2.4 2.3 2-Methylnaphthalene ug/L 2.5 95 40-16493 3 302.5<0.80 2.4 2.3 Acenaphthene ug/L 2.5 74 46-15472 2 302.5<0.50 1.8 1.8 Acenaphthylene ug/L 2.5 84 54-16681 3 302.5<0.50 2.1 2.0 Anthracene ug/L 2.5 98 49-16795 3 302.5<0.050 2.4 2.4 Benzo(a)anthracene ug/L 2.5 97 37-16292 6 302.5<0.050 2.4 2.3 Benzo(a)pyrene ug/L 2.5 89 10-19184 6 302.5<0.10 2.2 2.1 Benzo(b)fluoranthene ug/L 2.5 78 10-16572 8 302.5<0.050 1.9 1.8 Benzo(g,h,i)perylene ug/L 2.5 94 10-15788 7 302.5<0.20 2.3 2.2 Benzo(k)fluoranthene ug/L 2.5 86 10-16780 7 302.5<0.20 2.1 2.0 Chrysene ug/L 2.5 83 18-16079 6 302.5<0.10 2.1 2.0 Dibenz(a,h)anthracene ug/L 2.5 91 10-16486 6 302.5<0.15 2.3 2.1 Fluoranthene ug/L 2.5 93 25-19289 4 302.5<0.30 2.3 2.2 Fluorene ug/L 2.5 78 50-16374 4 302.5<0.31 2.0 1.9 Indeno(1,2,3-cd)pyrene ug/L 2.5 93 10-16286 7 302.5<0.050 2.3 2.2 Naphthalene ug/L 2.5 95 49-14792 3 302.5<1.5 2.4 2.4 Phenanthrene ug/L 2.5 85 42-15681 4 302.5<0.20 2.1 2.0 Pyrene ug/L 2.5 90 44-18187 4 302.5<0.10 2.3 2.2 2-Fluorobiphenyl (S)%101 40-16796 Nitrobenzene-d5 (S)%159 47-188156 Terphenyl-d14 (S)%165 46-173152 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 05/02/2024 05:17 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 13 of 19 #=QC# QUALITY CONTROL DATA Pace Project No.: Project: 92726959 Davie County Law Enforcement Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. QC Batch: QC Batch Method: Analysis Method: Analysis Description: 850772 EPA 420.4 Rev 1.0 1993 EPA 420.4 Rev 1.0 1993 420.4 Phenolics Laboratory:Pace Analytical Services - Asheville Associated Lab Samples:92726959001 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:4391394 Associated Lab Samples:92726959001 Matrix:Water AnalyzedMDL Phenolics, Total Recoverable mg/L <0.0050 0.0050 05/02/24 15:300.0039 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 4391395LABORATORY CONTROL SAMPLE: LCSSpike Phenolics, Total Recoverable mg/L 0.0550.05 109 90-110 Parameter Units MS Result % Rec Limits Qual% RecConc. 4391396MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92725191003 4391397 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. Phenolics, Total Recoverable mg/L 0.05 91 90-110100 4 100.050.051 0.096 0.10 Parameter Units MS Result % Rec Limits Qual% RecConc. 4391398MATRIX SPIKE & MATRIX SPIKE DUPLICATE: MSSpike Result 92726654002 4391399 MSD Result MSD % Rec RPD RPD Max MSDMS Spike Conc. Phenolics, Total Recoverable mg/L 0.05 105 90-11092 9 100.050.021 0.074 0.067 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 05/02/2024 05:17 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 14 of 19 #=QL# QUALIFIERS Pace Project No.: Project: 92726959 Davie County Law Enforcement DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean-Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as "Total" may vary slightly from the sum of the reported component parameters. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. ANALYTE QUALIFIERS Surrogate recovery exceeded laboratory control limits. Analyte presence below reporting limits in associated sample.S3 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 05/02/2024 05:17 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 15 of 19 #=CR# QUALITY CONTROL DATA CROSS REFERENCE TABLE Pace Project No.: Project: 92726959 Davie County Law Enforcement Lab ID Sample ID QC Batch Method QC Batch Analytical Method Analytical Batch 92726959001 849777EffluentSM 2540D-2015 92726959001 850119EffluentEPA 1664B 92726959001 850004 850058EffluentEPA 3511 EPA 8270E by SIM 92726959001 850772 851511EffluentEPA 420.4 Rev 1.0 1993 EPA 420.4 Rev 1.0 1993 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC.Date: 05/02/2024 05:17 PM Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 16 of 19 Page 17 of 19 Page 18 of 19 Page 19 of 19