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Cleanup in Vulnerable Communities'Initiative Final Project Reference:Bobson Cleaners <br /> Discovery and Enforcement Discovery Project Number:60688620-5.1 <br /> Investigation Work Plan <br /> 2. Sample containers will be obtained from the laboratory, which will assure that they are clean or new,free of <br /> contaminants: <br /> a. Summa canisters(soil gas), <br /> b. Tedlar® bag(soil gas), and <br /> c. Hydrochloric acid (HCI)pre-preserved VOA vials(groundwater); <br /> 3. Polyethylene bailer or decontaminated stainless steel bailer; <br /> 4. Temperature blanks will be obtained from the laboratory for each cooler; <br /> 5. Ziploc plastic bags; <br /> 6. Large plastic trash bags; <br /> 7. Insulated cooler and ice; <br /> 8. Deionized water; <br /> 9. Non-phosphate detergent; <br /> 10. Bubble wrap or Styrofoam peanuts for sample packaging; <br /> 11. Self-adhesive custody seals; <br /> 12. Glass fiber and strapping tape; <br /> 13. 55-gallon steel drums for storage of investigation-derived wastes; <br /> 14. Paper and cloth towels; <br /> 15. Isopropyl alcohol; and <br /> 16. Field sampling sheets and chain-of-custody forms. <br /> Drilling equipment will be provided by the subcontractor, which may include(but is not limited to)the following: hand <br /> auger, Direct Push Technology(DPT)drill rig or Hollow Stem Auger(HSA)drill rig, drive sampler, extension rods,and <br /> stainless-steel sample tubes. <br /> 3.2.6 Sample Analysis <br /> USEPA-approved analytical methods will be used to produce definitive-level data for use in the quantitative risk <br /> assessment. Screening-level data will be obtained from sub-slab soil vapor samples, outdoor soil vapor samples, <br /> indoor and ambient air samples, and from groundwater samples if encountered. <br /> Groundwater samples will be collected via grab groundwater collection. Groundwater sample analytical results will be <br /> considered screening-level data due to the method of sample collection, even though USEPA-approved analytical <br /> methods will be used. <br /> Soil gas samples will be collected via permanent soil gas and sub-slab soil vapor pins.The selected subcontractor <br /> will perform active soil gas sampling and all samples will be analyzed at the selected laboratory.The SOP for active <br /> soil gas investigations is presented in the Programmatic QAPP. <br /> Offsite soil gas, sub-slab, and indoor air analytical services will be provided by a laboratory that is accredited by the <br /> ELAP.The selected laboratory is Eurofins Air Toxics Laboratory in Folsom, California..The Laboratory quality <br /> assurance manual and SOPS are presented in Appendix C.The laboratories will be instructed to report estimated <br /> values, i.e., between the method detection limit and reporting limit,with a"J"qualifier. <br /> The following analytical methods will be used for the samples collected under this DI. Full analyte lists and laboratory <br /> reporting limits are presented in the Programmatic QAPP. <br /> Prepared for: Department of Toxic Substances Control AECOM <br /> 17 <br />