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PHASE II ESA WORK PLAN <br />2731 E. MYRTLE STREET )MESr <br />STOCKTON, CALIFORNIA PmirownwWSeices&iirtmlogy <br />Site. The work areas will also be cleared for underground utilities using a private underground <br />utility locating contractor. <br />2.3 SOIL SAMPLING <br />2.3.1 Borings <br />Soil borings will be advanced by hydraulic direct push drilling equipment operated by a <br />California C-57 licensed well drilling contractor (Figure 2-1). Soil cores will be collected <br />continuously from the borings using a 2.5 -inch diameter Macrocore core barrel outfitted with an <br />acetate liner. The soil cores will be field screened for total organic compounds using a hand-held <br />photoionization detector outfitted with a 10.6 electron -Volt lamp and calibrated to 100 parts per <br />million by volume as isobutylene gas. Closed headspace techniques will be used to field screen <br />the soil cores. Soil lithology within the soil cores will be described on boring logs using the <br />Unified Soil Classification System (Appendix B). The PID field screening measurements will <br />also be recorded on the boring logs. <br />2.3.2 Sample Collection and Laboratory Analysis <br />Soil samples for chemical analysis will be collected from the borings at the target depths listed in <br />Table 2-1. Soil samples will be collected by cutting the acetate liner at the target depth, then <br />capped with plastic end caps, labeled and placed in a cooler with ice and transportation to a State <br />Water Resources Control Board (SWRCB) Environmental Laboratory Accreditation Program <br />(ELAP) approved laboratory for chemical analysis following ASTM D 4840 chain -of -custody <br />protocols. The soil samples will be analyzed for metals including lead by United States <br />Environmental Protection Agency (USEPA) Method 6000/7000 series (Table 2-1). <br />4 <br />9123 <br />