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:WC <br />Workplan for Limited Phase II Investigation <br />SAFStor Self Storage <br />3076 Turnpike Road, <br />Stockton, California 95206 <br />Page 3 <br />Each shallow soil boring will be completed as a temporary soil vapor sampling probe, using '/4" <br />or 1/8" tubing and a filter point. At least two hours after installation, each point will be purged <br />and sampled according to current California Department of Toxic Substance Control (DTSC) <br />soil vapor sampling guidelines using laboratory -supplied manifolds and passivated stainless <br />steel Summa canisters. <br />Upon completion of sampling, each probe will be removed and all borings will be filled to near <br />grade with neat cement grout under the supervision of a representative from SJCEHD. The <br />borings will be patched with the appropriate materials to match the surface (including asphalt or <br />concrete patch where needed). <br />Laboratory Analysis <br />Groundwater samples collected will be submitted for chemical analysis under chain -of -custody <br />documentation to a California state certified laboratory Soil and groundwater samples will be <br />analyzed for total petroleum hydrocarbons quantified as gasoline (TPHg), diesel (TPHd) and motor <br />oil (TPHmo) by EPA 8015M; volatile organic compounds by EPA Method 82606; and semivolatile <br />organic compounds by EPA Method 8270. <br />Each vapor sample will be analyzed for volatile petroleum hydrocarbons via EPA Method TO - <br />15 and semi -volatile compounds via TO -17. Results will be included in a summary report for <br />the site. <br />REPORTING <br />Following completion of field work and receipt of laboratory reports, ATC will reduce the data; <br />evaluate the site using applicable California State cleanup criteria; and prepare a report of <br />findings to include recommendations and/or conclusions as applicable. A copy of the report will <br />be submitted to SJCEHD. <br />SCHEDULE <br />ATC will schedule field activities on this project as soon as possible upon receipt of permits, <br />depending on driller schedules. A report summarizing the work will be submitted approximately <br />4 weeks following receipt of the analytical results. <br />