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G'lo A0I-2 nil P • Ten soil borings will be hand augered to a depth of approximately 3 feet bgs in the area near the south end of the on-site Pole Rack to fii ther delineate impacts identified in RI Boring E2-2; and • Samples will be collected at 1 and 3 feet in each boring (depth of impact observed in on- site boring E2-2) and will be analyzed for PAHs using EPA Method 8270C Selective Ion Monitoring. A0I-3 PC��x6 g • Two soil borings will be hand augered to a depth of approximately 8 feet bgs. Four soil r i3 borings will be hand augered then drilled to a depth of approximately 15feet bgs • Samples will be collected at 1, 3, 5, 10 and 15 feet in each boring (depth of impact observed in on-site boring A3-2) and will be analyzed for PAHs using EPA Method 8270C Selective Ion Monitoring and TPH using EPA Method 8015. AOI-6 lc1't p(3 • /"o soil borings will be hand augered to a depth of approximately 3 feet below ground surface(bgs) U • Samples will be collected at 1 and 3 feet in this boring (depth of impact observed in on- site boring A3-SG3) and will be analyzed for PAHs using EPA Method 8270C Selective !2`r Ion Monitoring. All environmental borings will be screened for impact via visual, olfactory and/or PID readings; will be backfilled with portland cement with 5% bentonite as required by the San Joaquin County Environmental Health Division; and the surface will be returned to conditions existing prior to soil boring operations. Parsons will submit a copy of the investigation findings upon its approval by PG&E, DTSC and released to Geotracker as public record. CLOSING If you have any questions or require finther information,please contact Mr. Tom Blaney directly at(626)440-6067 or Mr. Paul Farmanian at(626)440-6148,for a prompt reply. Sincerely, Pew—) Tom Blaney Project Manager Attachments Figure 1 —Additional Boring Locations CS4 3)