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27 December 2021 AdvancedGeo <br /> An Employee Owned Company <br /> Project No. 21-6680 <br /> Page 3 of 4 Q`9 IX <br /> (ELAP)-certified laboratory. Each sample will be labeled with boring designation, depth, <br /> time, date, and sampler's initials. Soils encountered in the borings will be visually <br /> classified by AGI personnel in accordance with the Unified Soil Classification System <br /> (USCS). Additionally, soil samples will be field-screened for presence of volatile organic <br /> compounds using an organic vapor meter(OVM), equipped with photo-ionization detector <br /> (PID) pre-calibrated to isobutylene. <br /> 2.3. LABORATORY ANALYSIS <br /> Selected soil samples will be analyzed by a California ELAP-certified laboratory for the <br /> following constituents: <br /> • Total petroleum hydrocarbons (TPH) in accordance with EPA Method 8015M. <br /> • VOCs in accordance with EPA Method 82608. <br /> Laboratory reports for all analyses, testing methods, laboratory quality assurance/quality <br /> control (QA/QC) reports, and sample chain-of-custody documentation will be presented <br /> in a report with the findings and recommendations. <br /> 2.4. BORING ABANDONMENT <br /> All soil borings will be permanently sealed to prevent vertical migration of potential <br /> contaminants. Soil borings shall be abandoned by backfilling with cement grout from the <br /> total depth to surface grade. The top three to six inches of the boring abandonments will <br /> be completed flush to surface grade with concrete or native material. The EHD will be <br /> notified for grout inspection at least 48 hours prior to conducting grouting procedures. <br /> 2.5. EQUIPMENT DECONTAMINATION/WASTE MANAGEMENT <br /> All sampling tools used for sample collection will be thoroughly rinsed with clean water <br /> after being washed with a solution of Alconox. All probing rods will be cleaned prior to <br /> advancement at each probe boring location. Any soil or water waste generated during <br /> field activities will be containerized in properly labeled DOT-approved 55-gallon drums <br /> and stored on-site in an area generally lacking public access. Disposal alternatives will <br /> be evaluated based on results of soil and water analysis. <br /> If you have any questions or require further information, please contact our office at <br /> (800) 511-9300. <br />