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Home My WebLink AboutFA-29701_00000_CA_SCH_20221208 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 December 09, 2022 Mr. Jerren Rogers NCDEQ-UST Section Raleigh Regional Office 1628 Mail Service Center Raleigh, NC 27699-1628 Re: Site Check Report Southern Pines Mobil Mart 1300 Central Drive Southern Pines, Moore County North Carolina Facility ID Number: 00-0-0000022328 Incident Number: N/A GRI Project Number: 6307 Dear Mr. Rogers, Please find enclosed the referenced report for the above mentioned site. If you have any questions, please contact Eric Eubanks at 704-845-4010. Sincerely, Geological Resources, Inc. Leslie Maxtone-Graham Administrative Assistant Enclosure Cc: Mr. Alex Shahbain; S&H Rental, Inc., 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 Southern Pines Mobil Mart 1300 Central Drive Southern Pines, Moore County North Carolina Facility ID Number: 00-0-0000022328 Incident Number: NA GRI Project Number: 6307 Prepared for: Mr. Alex Shahbain S & H Rental, Inc. 645 Laurinburg Road Raeford, North Carolina 28376 December 8, 2022 Rae Troiano Brown, P.G. Project Manager Kyle Perry Report Writer ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: December 8, 2022 Southern Pines Mobil Mart Project Manager: Rae Troiano Brown, P.G. GRI Project No. 6307 i EXECUTIVE SUMMARY The Southern Pines Mobil Mart site is located at 1300 Central Drive in Southern Pines, Moore County, North Carolina. The property operates as a petroleum retail facility and convenience store. The site is covered by concrete, asphalt, and grass. One 12,000-gallon gasoline UST, one 4,000-gallon diesel UST, one 8,000-gallon gasoline UST, and one 4,000-gallon kerosene UST are in use at the site. On June 30, 2022, during spill bucket integrity testing, a large gash was reported in the spill bucket associated with the 12,000-gallon gasoline UST. Therefore, the spill bucket was replaced and a site check was required by the NCDEQ. On November 29, 2022, GRI conducted a site check in the area of the repaired spill bucket. One soil sample (SS-1-3’) was collected approximately 3 feet BGS adjacent to the repaired spill bucket. No contaminant concentrations were detected in the soil sample. Based on this information, no further action should be required. ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: December 8, 2022 Southern Pines Mobil Mart Project Manager: Rae Troiano Brown, P.G. GRI Project No. 6307 ii SITE INFORMATION 1. Site Identification  Southern Pines Mobil Mart (Facility ID 00-0-0000022328)  Incident Number NA  Location of Source Area: 1300 Central Drive Southern Pines, NC 28781 Moore County 35.21199°N, 79.392381°W (Topographical Map) 2. Information about Contacts Associated with the Leaking UST System UST Owner S & H Rental, Inc. P.O. Box 2048 Raeford, NC 28376-4048 Email Unknown Phone Unknown UST Operator S & H Rental, Inc. P.O. Box 2048 Raeford, NC 28376-4048 Email Unknown Phone Unknown Property Owner S & H Rental, Inc. 632 Overland Court Vass, NC 28394 Email Unknown Phone Unknown Property Occupant Southern Pines Mobil Mart 1300 Central Drive Southern Pines, NC 28387 Email Unknown Phone Unknown Consultant/Contractor Geological Resources, Inc. 3502 Hayes Road Monroe, NC 28110 rtb@geologicalresourcesinc.com 704-845-4010 Analytical Laboratory Geological Resources, Inc. 3502 Hayes Road Monroe, NC 28110 rtb@geologicalresourcesinc.com 704-845-4010 3. Information about Release  No previous releases have been reported.  One 12,000-gallon gasoline UST, one 4,000-gallon diesel UST, one 8,000-gallon gasoline UST, and one 4,000-gallon kerosene UST are in use at the site. Certification: I, Rae Troiano Brown, 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: December 8, 2022 Southern Pines Mobil Mart Project Manager: Rae Troiano Brown, P.G. GRI Project No. 6307 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: December 8, 2022 Southern Pines Mobil Mart Project Manager: Rae Troiano Brown, P.G. GRI Project No. 6307 TABLE OF CONTENTS EXECUTIVE SUMMARY ....................................................................................................................... i SITE INFORMATION ............................................................................................................................ ii ACRONYMS ....................................................................................................................................... iii A. SITE HISTORY AND CHARACTERIZATION ..............................................................................1 B. SITE CHECK PROCEDURES ....................................................................................................1 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 Analytical Results APPENDICES Appendix A: Triennial UST Spill Bucket Integrity Testing (UST-6D/23A) Appendix B: Subsurface Log Appendix C: UVF Report ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: December 8, 2022 Southern Pines Mobil Mart Project Manager: Rae Troiano Brown, P.G. GRI Project No. 6307 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 has been summarized in the attached Table 1. 2. UST System Information: In accordance with the Site Check Report guidelines, the UST system information has been summarized in the attached Table 2. One 12,000-gallon gasoline UST, one 4,000-gallon diesel UST, one 8,000-gallon gasoline UST, and one 4,000-gallon kerosene UST are in use at the site. A copy of the NCDEQ UST-10B table is shown below: 3. Non-UST Information: There are currently no ASTs and no known ASTs formerly at the site. 4. Comprehensive Description of the Release: No previous release has been reported at the site. In 2022, during spill bucket integrity testing, a large gash was reported in the spill bucket associated with the 12,000-gallon gasoline UST. A copy of the Triennial UST Spill Bucket Integrity Testing (UST-6D/23A) form is included as Appendix A. A site check was required by the NCDEQ to assess any potential contamination. On November 29, 2022, one soil boring was advanced approximately 3 feet BGS adjacent to the repaired spill bucket. No contaminant concentrations were reported in the soil sample. 5. Description of the Site Characteristics: The Southern Pines Mobil Mart site is located at 1300 Central Drive in Southern Pines, Moore County, North Carolina. (Figure 1). The property operates as a petroleum retail facility and convenience store. The site is covered by concrete, asphalt, and grass. One 12,000-gallon gasoline UST, one 4,000-gallon diesel UST, one 8,000-gallon gasoline UST, and one 4,000-gallon kerosene UST are in use at the site. The surrounding properties are residential. A Site Map has been included as Figure 2. B. SITE CHECK PROCEDURES 1. Results of Tank and Line Tightness Testing: On June 30, 2022, during spill bucket integrity testing, a large gash was reported in the spill bucket associated with the 12,000-gallon gasoline UST. A copy of the Triennial UST Spill Bucket Integrity Testing (UST-6D/23A) form is included as Appendix A. ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: December 8, 2022 Southern Pines Mobil Mart Project Manager: Rae Troiano Brown, P.G. GRI Project No. 6307 2 2. Summary of Site Check Procedure: On November 29, 2022, one soil sample was collected adjacent to the replaced spill bucket for the 12,000- gallon gasoline UST. Soil boring SS-1-3’ was collected from approximately 3 feet BGS. No free product was noted at the site. The soil boring log is provided as Appendix B. Photographs of the location are shown below: 3. Soil Excavation Activities: No soil excavation activities were conducted. C. SITE INVESTIGATION 1. Field Screening: The soil sample (SS-1-3’) collected on November 29, 2022 was not screened with a PID for VOCs. 2. Soil Sampling Information: On November 30, 2022, soil sample SS-1-3’ was analyzed for GRO by the UVF method. No contaminant concentrations were reported in the soil sample. A soil quality map is presented as Figure 3. A summary of soil sample analytical results is presented in Table 3. The UVF analytical report is provided as Appendix C. A summary of the soil sampling data from the November 2022 Site Check activities is show below: Sample ID Sample Depth (ft-BGS) Gasoline-Range TPH Diesel-Range TPH RAL (mg/kg) 50 100 SS-1-3’ 3 <10 --- 3. Ground Water and Surface Water Sampling Information: No ground water or surface water sampling activities were conducted. 4. Quality-Control Measures: ___________________________________________________________________________________________ Prepared by: Geological Resources, Inc. Site Check Report Prepared on: December 8, 2022 Southern Pines Mobil Mart Project Manager: Rae Troiano Brown, P.G. GRI Project No. 6307 3 Clean, disposable nitrile gloves were used for the collection of the soil sample. The sample was collected in supplied containers and analyzed following proper chain-of-custody procedures. D. SUMMARY AND CONCLUSIONS  The Southern Pines Mobil Mart site is a petroleum retail facility and convenience store. One 12,000-gallon gasoline UST, one 4,000-gallon diesel UST, one 8,000-gallon gasoline UST, and one 4,000-gallon kerosene UST are in use at the site. Surrounding properties are residential.  On June 30, 2022, during spill bucket integrity testing, a large gash was reported in the spill bucket associated with the 12,000-gallon gasoline UST. Therefore, the spill bucket was replaced.  On November 29, 2022, one sample was collected (SS-1-3’) adjacent to the replaced spill bucket. No contaminant concentrations were reported in the soil sample.  Based on this information, no further action should be required. E. LIMITATIONS This report has been prepared for the exclusive use of S & H Rental, Inc. for the specific application to the referenced site in Moore 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 LOCATIONFigure 1 Site LocationSouthern Pines Mobil Mart1300 Central DriveSouthern Pines, North CarolinaMoore CountyIncident No. N/AGRI Project No. 6307500 M2000 FTDate: 12/04/2022 Location: 35.211299° N -79.392381° W Dad TABLES UST ID Number 247056 Facility ID Number Owner or Operator? Owner/Operator UST ID Number 61356 Facility ID Number Owner or Operator? Owner/Operator 1000 Lexington Avenue, Thomasville NC 27360-3541 Unavailable PO Box 2048, Raeford NC 28376-4048 Unavailable 00-0-0000022328 Rex Oil Company 01/01/1976 - 09/07/2017 Address Telephone Number Name of Owner or Operator Dates of Ownership / Operation TABLE 1 UST OWNER/OPERATOR INFORMATION SOUTHERN PINES MOBIL MART (INCIDENT NO. NA) Address Telephone Number Name of Owner or Operator Dates of Ownership / Operation 00-0-0000022328 S & H Rental Inc. 09/07/2017 - Current Page 1 of 1 Date: 11/30/2022 Facility ID #: 00-0-0000022328 Was Release Associated with UST System? (Yes / No) 1 Gasoline NA 8,000 1/1/1974 Single Wall Steel 8' x 21' 4" Single Wall Steel Removed 6/10/1994 No 2 Gasoline NA 4,000 1/1/1978 Single Wall Steel 64" x 24' Single Wall Steel Removed 6/10/1994 No 3 Gasoline NA 8,000 1/1/1974 Single Wall Steel 8' x 21' 4" Single Wall Steel Removed 6/10/1994 No 4 Kerosene NA 4,000 1/1/1983 Single Wall Steel 64" x 24' Single Wall Steel Current No 5 Diesel NA 4,000 1/1/1983 Single Wall Steel 64" x 24' Other Current No A1 Gasoline NA 12,000 6/13/1994 Single Wall FRP 8' x 32' Single Wall Flex Current No A1A Gasoline NA 8,000 6/13/1994 Single Wall FRP 8' x 21' 4" Single Wall Flex Current No UST ID No. TABLE 2 UST SYSTEM INFORMATION SOUTHERN PINES MOBIL MART (Incident No. NA) 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: 11/07/22 5030/ 8015D 3550/ 8015C Sample IDDate Collected (mm/dd/yy)Sample Depth(ft-BGS)Gasoline-Range TPHDiesel-Range TPH50 100 NE NE NE NE SS-1-3' 11/29/22 3 <10 NR Notes: • Results reported in mg/kg (milligrams per kilograms). • ft-BGS: feet below ground surface. • RAL: Regulatory Action Level. • MCCs: Maximum Contaminant Concentrations (soils). • SCLs: Soil Cleanup Levels. • NE: Not Established. • NR: Not requested. RAL (mg/kg) Soil to Water MCC (mg/kg) Residential SCLs (mg/kg) TABLE 3 SUMMARY OF SOIL SAMPLE ANALYTICAL RESULTS SOUTHERN PINES MOBIL MART (Incident No. NA) Analytical Method  FACID: 00-0-0000022328 Page 1 of 1 APPENDICES APPENDIX A Triennial UST Spill Bucket Integrity Testing (UST-6D/23A) UST-6D/23A Triennial UST Spill Bucket Integrity Testing NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY, DIVISION OF WASTE MANAGEMENT, UST SECTION 1646 MAIL SERVICE CENTER, RALEIGH, NC 27699-1646 PHONE (919) 707-8171 FAX (919) 715-1117 http://www.wastenotnc.org/5/2020 Page 1 (Hydrostatic/Vacuum Test) • If any periodic test fails, a suspected release report must be submitted on a UST-17A form, UST Suspected Release 24 Hour Notice. The suspected release must be investigated, in accordance with 15A NCAC 2N .0603, and defective equipment repaired or replaced in accordance with 15A NCAC 2N .0404/.0900. Results of the investigation must be submitted on a UST-17B form, UST Suspected Release 7 Day Notice. • The primary containment and interstitial space of the spill bucket shall be tested in accordance with the manufacturer's written guidelines, PEI/RP100 “Recommended Practices for Installation of Underground Liquid Storage Systems” and/or PEI/RP1200 “Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities.” • The primary and secondary walls are both considered to be tested at the same time if vacuum is used to test the interstice. UST FACILITY Owner / Operator Name Facility IDFacility Name Facility Street Address Facility City County TESTING CONTRACTOR INFORMATION Company Name Phone Email address I certify, under penalty of law, that the testing data provided on this form documents the UST system equipment was checked in accordance with the manufacturer's guidelines and the applicable national industry standards listed in 15A NCAC 2N .407/.0501 and/or 15A NCAC 2N .0900. Print Name of person conducting inspection Signature of person conducting inspection Test Date Identify Spill Bucket (By Tank Number, Stored Product, etc.)Tank #Tank #Tank #Tank #Tank # Tank Size Product Indicate units for all measurements Bucket Manufacturer/Model Bucket Depth Construction SW DW SW DW SW DW SW DW SW DW Bucket Installation Type Direct Bury Direct Bury w/Liner Containment sump Direct Bury Direct Bury w/Liner Containment sump Direct Bury Direct Bury w/Liner Containment sump Direct Bury Direct Bury w/Liner Containment sump Direct Bury Direct Bury w/Liner Containment sump Test Type Hydrostatic Vacuum Hydrostatic Vacuum Hydrostatic Vacuum Hydrostatic Vacuum Hydrostatic Vacuum Liquid and debris removed from spill bucket?Yes No Yes No Yes No Yes No Yes No Visual inspection (No cracks, loose parts or separation of the bucket from the fill pipe.)Pass Fail Pass Fail Pass Fail Pass Fail Pass Fail Tank riser cap included in test?Yes No N/A Yes No N/A Yes No N/A Yes No N/A Yes No N/A Drain valve included in test?Yes No N/A Yes No N/A Yes No N/A Yes No N/A Yes No N/A Wait time between applying vacuum/water and start of test Primary Section Test Hydrostatic: Water level must be within 1.5 inches of top of bucket Vacuum: Apply vacuum of 30 inches WC Begin End Test Time Begin End Reading Secondary Interstice Test Vacuum: Apply vacuum of 15 inches WC Begin End Test Time Begin End Reading Pass/fail criteria: Must pass visual inspection. Hydrostatic: Water level drop of less than 1/8 inch in 1 hour; Vacuum single-walled only: Maintain at least 26 inches water column for 1 minute; Vacuum double-walled: Maintain at least 12 inches water column for 1 minute Test Results Pass Fail Pass Fail Pass Fail Pass Fail Pass Fail Comments - (include information on repairs made prior to testing, and recommended follow-up for failed tests) Date next Spill Bucket integrity test due (required every 3 years) S & H Rental Inc.00-0-0000022328Southern Pines Mobil Mart 1300 Central Drive Southern Pines Moore PetroTest, Inc. (919)902-3794 PetroTest@PetroTest.net Anthony Miller II 06/30/2020 1234 12,000 8,000 4,000 4,000 Unleaded Premium Diesel Kerosene OPW/1C-2100 OPW/1C-2100 OPW/1C-2100 OPW/1C-2100 10.75"10.0" 12.0"12.0" 15 Minutes 15 Minutes 15 Minutes 15 Minutes 10.0"6.5"9.25" 9.25" 11.75" 11.75" 11.25"11.25" 8:51am 9:51am 8:51am 9:51am 8:51am 9:51am 8:58am 9:58am the Unleaded spill bucket failed due to a large gash in the side of the bucket 06/30/2023 APPENDIX B Subsurface Log Geological Resources, Inc.Phone:(704) 845-4010 3502 Hayes Road Fax:(704) 845-4012 Monroe, NC 28110 SUBSURFACE LOG Project Southern Pines Mobil Mart Address 1300 Central Drive, Southern Pines, North Carolina Boring Number SS-1 Date Drilled Sample Method Grab Drilling Method Hand Auger Completion Details Boring terminated at 3' and abandoned w/ native soils Driller Sam Bowers Log By Kyle Perry Lab Sample OVADepthSampleInterval(ft)ppm LITHOLOGY 0 2 SS-1-3'3'--- 4 6 8 11/29/22 0.0' - 2.0' pea gravel 2.0' - 3.0' grey coarse SAND Boring terminated @ 3.0' and abandoned APPENDIX C UVF 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: November 29, 2022 Samples Analyzed: November 30, 2022 Site Name: Southern Pines Mobil Mart Site Address: 1300 Central Drive, Southern Pines, NC GRI Project Number: 6307 November 30, 2022 Kyle Perry: Staff Scientist 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 UVF 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  Please note that any samples extracted and/or analyzed offsite require a Chain of Custody documenting the collection, extraction and custody of the sample(s) Technical Procedures Dilution Preparation  An adjustable micropipette is used to precisely measure out the amount of extract needed for the dilution  The measured out amount of the extract is added to a clean test tube and methanol is added to 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 UVF 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 day 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 Analysed: Project Manager:Operator: Sample ID Matrix Dilution Factor x GRO Output (ppm) =GRO Value (mg/Kg) Dilution Factor x DRO Output (ppm) =DRO Value (mg/Kg) SS-1-3'Soil 20 <0.5 <10 --------- UVF Analytical Report siteLAB UVF Trilogy 11/30/2022 11/29/2022 Kyle Perry Southern Pines Mobil Mart 6307 Rae Brown Report Date: 11/30/2022 Page: 1 of 1Southern Pines Mobil Mart Site: