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Home My WebLink AboutWA-29026_48218_CA_RPTS_20220120_UVF 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: December 2, 2021 Samples Analyzed: December 10, 2021 Site Name: Speedway #8654 Site Address: 5068 NC Highway 33 East, Greenville, NC GRI Project Number: 3389 December 13, 2021 Joanna Alley, E.I.T. Operator Technical Procedures 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  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 Technical Procedures 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 Method Blank  A method blank of methanol will be analyzed following calibration and following the last sample analyzed 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) DSL-2'Soil 100 9.63 963 100 8.91 891 Dup DSL-2'Soil 100 10.00 1000 100 9.39 939 UVF Analytical Report siteLAB UVF Trilogy 12/10/2021 12/2/2021 Joanna Alley Speedway #8654 3389 Nicole Long Site: Speedway #8654 Report Date: 12/13/2021 Page: 1 of 1