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Home My WebLink AboutFA-29176_48356_CA_SCH_20220509 3502 Hayes Road • Monroe, North Carolina 28110 113 West Firetower Road, Suite G • Winterville, North Carolina 28590 Phone (704) 845-4010 • (888) 870-4133 • Fax (704) 845-4012 May 9, 2022 Mr. James Brown NCDEQ-UST Section Fayetteville Regional Office Systel Building 225 Green Street, Suite 714 Fayetteville, NC 28301-5043 Re: Site Check Report Value Mart 5231 Highway87 South Sanford, Harnett County North Carolina Facility ID Number: 00-0-0000009843 Incident Number: Pending GRI Project Number: 5943 Dear Mr. Brown, Please find enclosed the referenced report for the above mentioned site. If you have any questions, please contact Chris Birchfield at 704-845-4010. Sincerely, Geological Resources, Inc. Leslie Maxtone-Graham Administrative Assistant Enclosure Cc: Mr. Roger Calcutt; Hunter Oil Company, file 3502 Hayes Road • Monroe, North Carolina 28110 113 West Firetower Road, Suite G • Winterville, North Carolina 28590 Phone (704) 845-4010 • (888) 870-4133 • Fax (704) 845-4012 Engineering Certification: C-2727 • Geology Certification: C-127 Site Check Report Value Mart 5231 Highway 87 South Sanford, Harnett County North Carolina Facility ID Number: 00-0-0000009843 Incident Number: Pending GRI Project Number: 5943 Prepared for: Mr. Roger Calcutt Hunter Oil Company 1203 S. Horner Street Sanford, North Carolina 27330 May 9, 2022 Chris Birchfield Junior Project Manager ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: May 9, 2022 Value Mart Project Manager: Chris Birchfield GRI Project No. 5943 i EXECUTIVE SUMMARY The Value Mart site is located at 5231 Highway 87 South in Sanford, Harnett County, North Carolina. The property operates as a petroleum retail facility and convenience store. The site is covered by asphalt, concrete, and grass. Two 2,000-gallon gasoline USTs were removed in April 1997. There are one 10,000- gallon unleaded gasoline, one 8,000-gallon premium gasoline, and one 6,000-gallon diesel USTs currently in use at the site with six associated dispenser islands. During triennial compliance testing activities on June 4, 2021, non-passing spill buckets were reported for the 10,000-gallon unleaded gasoline and 6,000-gallon diesel USTs. Therefore, a site check was required by the NCDEQ. During spill bucket replacement activities on March 29, 2022, GRI conducted a Site Check. Soil samples were collected from approximately 3 feet bgs directly beneath each of the three spill buckets for analysis of TPH-GRO and TPH-DRO using UVF technology. The TPH-GRO and TPH-DRO concentrations in all three samples exceeded the RALs. Two previous releases have been documented at the site in 1997 and 1999. These incidents were closed in 2001 and 2020. Based on this information, GRI recommends an LSA to determine the risk ranking of the site. ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: May 9, 2022 Value Mart Project Manager: Chris Birchfield GRI Project No. 5943 ii SITE INFORMATION 1. Site Identification  Value Mart (Facility ID 00-0-0000009843)  Incident Number Pending – Risk Ranking Undetermined  Location of Source Area: 5231 Highway 87 South Sanford, NC 27330 Harnett County 35.380494°N, 79.109427°W (Topographical Map) 2. Information about Contacts Associated with the Leaking UST System UST/AST Owner Worsley Energy Companies, Inc. (Table 1) 1203 S Horner Blvd Sanford, NC Phone No. 919-775-5651 UST/AST Operator Donald Worsley 1203 S Horner Blvd Sanford, NC Email Unknown Phone No. Unknown Property Owner Worsley Energy Companies 1203 S Horner Blvd Sanford, NC Email Unknown Phone No. Unknown Property Occupant D AND SW Properties LLC 5231 NC 87 N Sanford, NC, 27332 Phone No. Unknown Consultant/Contractor Geological Resources, Inc. 3502 Hayes Road Monroe, NC 28110 ckb@geologicalresourcesinc.com 704-845-4010 Analytical Laboratory Geological Resources, Inc. 3502 Hayes Road Monroe, NC 28110 704-845-4010 3. Information about Release  Release was discovered on March 31, 2022  An unknown amount of product was released from the leaking UST System via non-passing spill buckets  Two 2,000-gallon gasoline USTs were removed in April 1997. One 10,000-gallon regular gasoline UST, one 8,000-gallon premium gasoline UST and one 6,000-gallon diesel UST are in use at the site. Certification: I, Michael S. Mastbaum., a Licensed Geologist for Geological Resources, Inc., do certify that the information contained in this report is correct and accurate to the best of my knowledge. Geological Resources, Inc. is licensed to practice geology and engineering in North Carolina. The certification numbers of the corporation are C-127 and C-2727, respectively. ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: May 9, 2022 Value Mart Project Manager: Chris Birchfield GRI Project No. 5943 iii ACRONYMS ACM: Asbestos Containing Materials AFVR: Aggressive Fluid-Vapor Recovery ARR: Acknowledgement of Report Receipt AS: Air Sparging AST: Aboveground Storage Tank ASTM: American Society for Testing and Materials BGS: Below Ground Surface CAP: Corrective Action Plan CFR: Code of Federal Regulations CSA: Comprehensive Site Assessment DPE: Dual Phase Extraction DRO: Total Petroleum Hydrocarbons Diesel Range Organics DWM: Division of Waste Management DWR: Department of Water Resources EPA: Environmental Protection Agency EPH: Extractible Petroleum Hydrocarbons ESA: Environmental Site Assessment GCL: Gross Contamination Level GRI: Geological Resources, Inc. GRO: Total Petroleum Hydrocarbons Gasoline Range Organics LSA: Limited Site Assessment MAC: Maximum Allowable Concentration as specified in T15A NCAC 2L.0202 MADEP: Massachusetts Department of Environmental Protection MCC: Maximum Contaminant Concentrations MMPE: Mobile Multi-Phase Extraction NAPL: Non-Aqueous Phase Liquid, “Free Product” NCDEQ: North Carolina Department of Environmental Quality NCDOT: North Carolina Department of Transportation NFA: Notice of No Further Action NORR: Notice of Regulatory Requirements NOV: Notice of Violation NPDES: National Pollutant Discharge Elimination System NRP: Notice of Residual Petroleum O&M: Operation and Maintenance PAHs: Polynuclear Aromatic Hydrocarbons PCA: Pre-Construction Assessment RAL: Regulatory Action Level SCLs: Soil Cleanup Level SPCC: Spill Prevention Control and Countermeasures SVE: Soil Vapor Extraction SVOCs: Semi-Volatile Organic Compounds SWPPP: Stormwater Pollution Prevention Plan TCLP: Toxicity Characteristic Leaching Procedure (EPA Method SW-846 1311) TOC: Top of Casing TPH: Total Petroleum Hydrocarbons USGS: United States Geological Survey UST: Underground Storage Tank UVF: Ultraviolet Fluorescence VOCs: Volatile Organic Compounds VPH: Volatile Petroleum Hydrocarbons ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: May 9, 2022 Value Mart Project Manager: Chris Birchfield GRI Project No. 5943 TABLE OF CONTENTS EXECUTIVE SUMMARY ....................................................................................................................... i SITE INFORMATION ............................................................................................................................ ii ACRONYMS ....................................................................................................................................... iii A. SITE HISTORY AND CHARACTERIZATION ..............................................................................1 B. SITE CHECK PROCEDURES ....................................................................................................2 C. SITE INVESTIGATION ...........................................................................................................2 D. SUMMARY AND CONCLUSIONS ...........................................................................................3 E. LIMITATIONS ......................................................................................................................3 FIGURES Figure 1: Site Location Map Figure 2: Site Map Figure 3: Soil Quality Map TABLES Table 1: UST Owner/Operator Information Table 2: UST System Information Table 3: Summary of Soil Sample Analytical Results APPENDICES Appendix A: 24-Hour Release and UST Leak Reporting Form (UST-61) Appendix B: Certificate of Storage Tank System Testing Appendix C: Laboratory Analytical Report ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: May 9, 2022 Value Mart Project Manager: Chris Birchfield GRI Project No. 5943 1 A. SITE HISTORY AND CHARACTERIZATION 1. UST Owner and Operator Information: In accordance with the Site Check Report guidelines, the UST owner and operator information is summarized in Table 1. 2. UST System Information: In accordance with the Site Check Report guidelines, the UST system information is summarized in Table 2. Two 2,000-gallon gasoline USTs were removed in April 1997. There are one 10,000-gallon gasoline, one 8,000-gallon gasoline, and one 6,000-gallon diesel USTs currently in use at the site with six associated dispenser islands. The dispensers are located on both sides of the store building. A copy of the NCDEQ Registered Tank Report is shown below: 3. Non-UST Information: There are currently no ASTs. Historically, two ASTs were reportedly present at the site. 4. Comprehensive Description of the Release: Triennial compliance testing was completed on June 04, 2021. Non-passing hydrostatic results were reported for the 10,000-gallon regular gasoline and 6,000-gallon diesel UST spill buckets. A site check was required by the NCDEQ. During replacement activities on March 29, 2022, three soil samples (SB-1, SB-2, and SB-3) were collected from approximately 3 feet bgs directly beneath the spill bucket for each UST. The samples were analyzed for TPH-GRO and TPH-DRO using UVF technology. All of the reported contaminant concentrations exceeded the RALs. Upon receipt of the analytical results on March 31, 2022, a release was confirmed at the site. A copy of the UST-61 Form is included as Appendix A. ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: May 9, 2022 Value Mart Project Manager: Chris Birchfield GRI Project No. 5943 2 5. Description of the Site Characteristics: The Value Mart site is located at 5231 Highway 87 South in Sanford, Harnett County, North Carolina. (Figure 1). The property operates as a petroleum retail facility and convenience store. The site is covered by asphalt, concrete, and grass. Two 2,000-gallon gasoline USTs were removed in April 1997. There are one 10,000-gallon gasoline, one 8,000-gallon gasoline, and one 6,000-gallon diesel USTs currently in use at the site with six associated dispenser islands. The surrounding properties are commercial and residential. A Site Map is included as Figure 2. B. SITE CHECK PROCEDURES 1. Results of Tank and Line Tightness Testing: On June 04, 2021, two non-passing UST spill buckets were reported at the site. All three spill buckets at the site were replaced on March 29, 2022. 2. Summary of Site Check Procedure: GRI performed a site check during replacement activities on March 29, 2022, that included collection of three soil samples at the spill buckets associated with the 10,000-gallon gasoline, 8,000-gallon gasoline, 6,000-gallon diesel USTs. The soil samples (SB-1, SB-2, and SB-3) were collected from approximately 3 feet bgs directly beneath the spill buckets. 3. Soil Excavation Activities: No soil excavation activities were conducted. C. SITE INVESTIGATION 1. Field Screening: The soil samples (SB-1, SB-2 and SB-3) collected on March 29, 2022, were not screened with a PID for VOCs. 2. Soil Sampling Information: Soil samples SB-1, SB-2 and SB-3 were collected on March 29, 2022 for analyses of TPH GRO and TPH DRO using UVF technology. All reported contaminant concentrations were above the RALs. No free product was noted at the site. A soil quality map is presented as Figure 3. A summary of soil sample analytical results is presented in Table 3. The laboratory analytical report is provided in Appendix C. A summary of the soil sampling data from the March 2022 Site Check activities is show below: Sample ID Sample Depth (ft-BGS) Gasoline-Range TPH Diesel-Range TPH RAL (mg/kg) 50 100 SB-1 3 1,052 365 SB-2 3 2,112 1,272 SB-3 3 145 145 ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: May 9, 2022 Value Mart Project Manager: Chris Birchfield GRI Project No. 5943 3 3. Quality-Control Measures: Clean, disposable nitrile gloves were used for collection of the soil samples. The samples were collected, placed on ice and followed proper chain-of-custody procedures. D. SUMMARY AND CONCLUSIONS • The site is a petroleum retail facility and convenience store, and the surrounding properties are commercial and residential. • On May 4, 2021, non-passing hydrostatic results were reported for the spill buckets on the 10,000- gallon regular gasoline and 6,000-gallon diesel USTs. • A site check was conducted during spill bucket replacement activities on March 29, 2022, to determine if a petroleum release had occurred. • Three soil samples (SB-1, SB-2 and SB-3) were collected directly beneath the spill buckets for analysis of TPH-GRO and TPH-DRO. All reported contaminant concentrations were above the RALs. • Two previous releases have been documented at the site (Incident Nos. 19746 and 18916). • Based on this information, GRI recommends that an LSA be conducted to determine the risk ranking of the site. E. LIMITATIONS This report has been prepared for the exclusive use of Hunter Oil Company for the specific application to the referenced site in Harnett County, North Carolina. The assessment was conducted based on the scope of work and level of effort specified by the NCDEQ and with resources adequate only for that scope of work. Our findings have been developed in accordance with generally accepted standards of geology and hydrogeology practices in the State of North Carolina, available information, and our professional judgment. No other warranty is expressed or implied. The data that are presented in this report are indicative of conditions that existed at the precise locations sampled and at the time the samples were collected. In addition, the data obtained from samples would be interpreted as being meaningful with respect to parameters indicated in the laboratory report. No additional information can logically be inferred from these data. FIGURES SITE LOCATION Figure 1 Site Location Value Mart 5231 Highway 87 South Sanford, North Carolina Harnett County Incident No. Pending GRI Project No.5943 500 M 2000 FT Date: 05/01/2022 Location: 35.380494° N -79.109427° W D a d TABLES UST ID Number 3 - 5 Facility ID Number Owner or Operator? Owner/Operator UST ID Number 3 - 5 Facility ID Number Owner or Operator? Owner/Operator UST ID Number 1 - 4 Facility ID Number Owner or Operator? Owner/Operator UST ID Number 1 & 2 Facility ID Number Owner or Operator? Owner/Operator Address Telephone Number Address Telephone Number Unknown Unknown Name of Owner or Operator Dates of Ownership / Operation 00-0-0000009843 Name of Owner or Operator Dates of Ownership / Operation Unknown 04/15/1997 - 07/10/2010 TABLE 1 UST OWNER/OPERATOR INFORMATION VALUE MART (INCIDENT NO. PENDING) Address Telephone Number Name of Owner or Operator Dates of Ownership / Operation 00-0-0000009843 Worsley Energy Companies, Inc.07/10/2010 - Current 919-770-4610 Unknown Unknown Unknown Unknown 00-0-0000009843 Unknown 12/28/1995 - 04/15/1997 Address Telephone Number Name of Owner or Operator Dates of Ownership / Operation 1203 S Horner Blvd, Sanford, NC 00-0-0000009843 Unknown 05/07/1985 - 12/28/1995 Page 1 of 1 Date: 04/26/2022 Was Release Associated with UST System? (Yes / No) 1 Gasoline NA 2,000 05/07/1985 Single Wall Steel Unknown Single Wall FRP Closed (04/15/97)No 2 Gasoline NA 2,000 05/07/1985 Single Wall Steel Unknown Single Wall FRP Closed (04/15/97)No 3 Gasoline NA 10,000 12/28/1995 Single Wall Steel/FRP Unknown Other Current Yes 4 Gasoline NA 8,000 12/28/1995 Single Wall Steel Unknown Other Current Yes 5 Diesel NA 6,000 04/15/1997 Single Wall Steel Unknown Other Current Yes UST ID No. TABLE 2 UST SYSTEM INFORMATION VALUE MART (INCIDENT NO. PENDING) Facility ID #: 00-0-0000009843 Tank Dimensions Description of Associated Product Piping and Pumps Status of UST Current or Most Recent Contents Previous Contents Capacity (gallons) Date Installed Construction Details Page 1 of 1 Date: 04/26/2022 5030/ 8015D 3550/ 8015C Sample IDDate Collected (mm/dd/yy)Sample Depth(ft-BGS)Gasoline-Range TPHDiesel-Range TPH50 100 SB-1 03/29/22 3 1,052 365 SB-2 03/29/22 3 2,112 1,272 SB-3 03/29/22 3 145 145 Notes: • Results reported in mg/kg (milligrams per kilograms) • Trip Blank results reported in ug/l (micrograms per liter) • ft-BGS: feet below ground surface. • RAL: Regulatory Action Level. • MCCs: Maximum Contaminant Concentrations (soils). • SCLs: Soil Cleanup Levels. • < : Less than the method detection limit specified in the laboratory report • Concentrations in bold face type indicate the MCCs were below the reported concentrations. • Concentrations in italic type indicate the residential SCLs soil-to-water were below the reported concentrations. • NE: Not Established • NR: Not Requested. Facility ID #: 00-0-0000009843 Analytical Method  TABLE 3 SUMMARY OF SOIL SAMPLE ANALYTICAL RESULTS VALUE MART (INCIDENT NO. PENDING) RAL (mg/kg) Page 1 of 1 APPENDICES Appendix A 24-Hour Release and UST Leak Reporting Form (UST-61) UST-61 24-Hour Release and UST Leak Reporting Form. For Releases in NC This form should be completed and submitted to the UST Section’s regional office following a known or suspected release from an underground storage tank (UST) system. This form is required to be submitted within 24 hours of discovery of a known or suspected release (DWM USE ONLY) Incident # ________ Risk (H,I,L,U)_______ Received On ________ Received By ________ Reported by (circle one): Phone, Fax or Report Region _______ Suspected Contamination? (Y/N) ________ Confirmed GW Contamination? (Y/N) ______ Confirmed Soil Contamination ?(Y/N) ______ Samples Taken?(Y/N) ______ Free Product? (Y/N) _____ If Yes, State Greatest Thickness ______________ Facility ID Number ______________ Date Leak Discovered ___________ Comm/Non-Commercial? ________ Reg/Non-regulated? _____________ INCIDENT DESCRIPTION Incident Name: Address: County: City/Town: Zip Code: Regional Office (circle one): Asheville, Mooresville, Fayetteville, Raleigh, Washington, Wilmington, Winston-Salem Latitude (decimal degrees): Longitude (decimal degrees) : Obtained by: Briefly describe suspected or confirmed release: (including but not limited to: nature of release, date of release, amount of release, amount of free product present and recovery efforts, initial responses conducted, impacts to receptors)  GPS  Topographic map  GIS Address matching  Other  Unknown Describe location: HOW RELEASE WAS DISCOVERED (Release Code) (Check one)  Release Detection Equipment or Methods  During UST Closure/Removal  Property Transfer  Visual/Odor  Water in Tank  Water Supply Well Contamination  Groundwater Contamination  Surface Water Contamination  Other (specify) _______________ SOURCE OF CONTAMINATION Source of Release (Check primary source) Cause of Release (Check primary cause) Type of Release (Check one) Product Type Released (Check primary product type released)  Tank  Piping  Dispenser  Submersible Turbine Pump  Delivery Problem  Spill Bucket  Other  Unknown Definitions presented on reverse  Spill  Overfill  Corrosion  Physical/Mechanical Damage  Install Problem  Other  Unknown Definitions presented on reverse  Petroleum  Non-Petroleum  Both Location (Check one)  Facility  Residence  Other  Gasoline/ Diesel/ Kerosene  Heating Oil  Other Petroleum Products  Metals  Other Inorganics  Other Organics  Diesel/Veg. Oil Blend  Vegetable Oil 100%  E10 – E20  E21 – E84  E85 – E99  Ethanol 100%  E01 – E09 Ownership 1. Municipal 2. Military 3. Unknown 4. Private 5. Federal 6. County 7. State Operation Type 1. Public Service 2. Agricultural 3. Residential 4. Education/Relig. 5. Industrial 6. Commercial 7. Mining UST Form 61 (02/19) Page 1 of 2 IMPACT ON DRINKING WATER SUPPLIES Water Supply Wells Affected? 1. Yes 2. No 3. Unknown Number of Water Supply Wells Affected __________________ Water Supply Wells Contaminated: (Include Users Names, Addresses and Phone Numbers. Attach additional sheet if necessary) 1. 2. 3. UST SYSTEM OWNER UST Owner/Company Point of Contact Address City State Zip Code Telephone Number UST SYSTEM OPERATOR UST Operator/Company Address City State Zip Code Telephone Number LANDOWNER AT LOCATION OF UST INCIDENT Landowner Address City State Zip Code Telephone Number Draw Sketch of Area (showing two major road intersections) or Attach Map Person Reporting Incident Company Telephone Number Title Address Date UST Form 61 (02/19) Page 2 of 2 Definitions of Sources Tank: means the tank that stores the product and is part of the underground storage tank system Piping: means the piping and connectors running from the tank or submersible turbine pump to the dispenser or other end-use equipment (Vent, vapor recovery, or fill lines are excluded.) Dispenser: includes the dispenser and the equipment used to connect the dispenser to the piping (e.g., a release from a suction pump or from components located above the shear valve) Submersible Turbine Pump (STP) Area includes the submersible turbine pump head (typically located in the tank sump), the line leak detector, and the piping that connects the submersible turbine pump to the tank Delivery Problem: identifies releases that occurred during product delivery to the tank. (Typical causes associated with this source are spills and overfills.) Other: serves as the option to use when the release source is known but does not fit into one of the preceding categories (e.g., for releases from vent lines, vapor recovery lines, and fill lines) Unknown: identifies releases for which the source has not been determined Definitions of Causes Spill: use this cause when a spill occurs (e.g., when the delivery hose is disconnected from the tank fill pipe or when the nozzle is removed from the dispenser) Overfill: use when an overfill occurs (e.g., overfills may occur from the fill pipe at the tank or when the nozzle fails to shut off at the dispenser) Physical or Mechanical Damage: use for all types of physical or mechanical damage, except corrosion (e.g., puncture of tank or piping, loose fittings, broken components, and components that have changed dimension) Corrosion: use when a metal tank, piping, or other component has a release due to corrosion (e.g., for steel, corrosion takes the form of rust) Installation Problem: use when the problem is determined to have occurred specifically because the UST system was not installed properly Other: use this option when the cause is known but does not fit into one of the preceding categories (e.g., putting regulated substances into monitoring wells) Unknown: use when the cause has not been determined Appendix B Certificate of Storage Tank System Testing APPENDIX C Laboratory Analytical Report 3502 Hayes Road • Monroe, North Carolina 28110 113 West Firetower Road, Suite G • Winterville, North Carolina 28590 Phone (704) 845-4010 • (888) 870-4133 • Fax (704) 845-4012 Engineering Certification: C-2727 • Geology Certification: C-127 UVF Trilogy Analytical Report Samples Collected: March 29, 2022 Samples Analyzed: March 31, 2022 Site Name: Value Mart Site Address: 5231 Highway 87 South, Sanford, NC GRI Project Number: 5943 March 31, 2022 Xavier Farmer Operator Technical Procedures Sample Collection and Handling Soil samples may be collected using any acceptable procedure. Sampler must use a clean pair of nitrile gloves for each sample collected. The sample will be placed in a clean, sealable bag (ziplock). Once collected, the sample must be analyzed immediately or placed on ice. The sample may be kept on ice for up to 48 hours prior to UVF analyses. If the sample cannot be analyzed within 48 hours, the sample may be extracted and kept at 4 degrees C for up to 14 days. Proper chain-of-custody procedures must be followed. Calibration The UFV Trilogy has standard calibrations stored for the following analysis:  GRO  DRO  Total PAH  Target PAH  Heavy PAH Prior to use, calibration standards are used to perform a 5-point verification on the factory stored calibrations for GRO and DRO. The calibration standards used are as follows: GRO  0.5 ppm  1 ppm  3 ppm  5 ppm  10 ppm DRO  0.1 ppm  0.5 ppm  1 ppm  3 ppm  5 ppm Operation Sample Extraction  5mg of soil are weighed into a clean extraction jar  Methanol is added to the extraction jar to create a 2x or 4x dilution o 2x Dilution: 10 mL of methanol o 4x Dilution: 20 mL of methanol  The extraction jar is shaken for several minutes to thoroughly mix the soil with solvent (methanol)  The mixture is allowed to settle for several minutes  A clean syringe is used to draw liquid from the extraction jar  A clean filter is attached to the end of the syringe and the liquid dispensed through the filter into a clean test tube  This liquid is referred to as the extraction Dilution Preparation  An adjustable micropipette is used to precisely measure out the amount of extract needed for the dilution Technical Procedures  The measured out amount of the extract is added to a clean test tube and methanol is added dilute the extract. Examples of dilutions are shown below: Extract Amount 500 μL 200 μL 100 μL 50 μL 25 μL Add Solvent to the 5 mL line 5 mL line 5 mL line 5 mL line 5 mL line 2x Extract Dilution Factor 20x 50x 100x 200x 400x 4x Extract Dilution Factor 40x 100x 200x 400x 800x Sample Analyzation  The dilution is shaken to thoroughly mix, then poured into a clean glass cuvette  The desired module is inserted into the UVF Trilogy and the corresponding factory calibration is selected  “Measure Fluorescence” is pressed on the touchscreen and the reading is recorded  The reading should be between the concentrations of the calibration standards (GRO: 0.5-10 ppm; DRO 0.1-5 ppm) o Reading below the calibration standard range are recorded as below the detection limit  Detection Limit = (lower range of calibration standards range) x dilution factor (i.e. a GRO sample with a 100x dilution factor has a detection limit of 50 ppm) o Readings above the calibration standard range should be further diluted and reanalyzed o Negative readings are an indication of quenching (see below)  The reading is multiplied by the dilution factor to calculate the final concentration  Check suspected contaminated samples for quenching by running additional dilutions o According to the siteLAB Quick Reference Guide: “Quenching” can occur when the detector is swamped by too many hydrocarbons or organic interferences, producing low or negative concentrations. Test the sample at multiple dilutions to confirm results are linear and accurate.” QA/QC Calibration  The UFV Trilogy will be calibrated daily prior to use  The calibration results will be saved and entered into the calibration log Method Blank  A method blank of methanol will be analyzed following calibration and following the last sample analyzed for each site Duplicates  One duplicate will be analyzed for every 20 samples  The duplicate will be prepared from the extract of the sample and diluted to the same factor as the sample analyzed Project Name:Date Collected: Project Number:Date Analyzed: Project Manager:Sampler: Sample ID Matrix Dilution Factor x GRO Output (ppm) =GRO Value (mg/Kg) Dilution Factor x DRO Output (ppm) =DRO Value (mg/Kg) SB-1 Soil 200 5.26 1,052 100 3.65 365 SB-2 Soil 400 5.28 2,112 400 3.18 1,272 SB-3 Soil 100 1.45 145 100 1.45 145 UVF Analytical Report siteLAB UVF Trilogy 3/31/2022 3/29/2022 Sam McKay Value Mart 5943 Chris Birchfield Site: Value Mart Report Date: 3/31/2022 Page: 1 of 1