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GeoCa ' 2ecFnics Inc. Page 3 <br /> B of Stockton(Airport) <br /> Project No. 827.2 <br /> October 17, 1999 <br /> The OVM is a portable photo ionization detector that uses a 10.0 eV lamp to detect <br /> compounds with ionization potential below 10.0 eV (hydrocarbon range). A boring log <br /> providing sediment description using the USCS and field observations will be maintained by <br /> a professional geologist working under the supervision of a registered geologist. <br /> 2.2 Groundwater Sample Collection <br /> Groundwater is not expected to be encountered, so groundwater sampling is not proposed. <br /> 2.3 Laboratory Analyses <br /> The soil samples will be submitted to Sherwood Laboratories of Hilmar (State Certified <br /> Laboratory#1400). They will be analyzed for: <br /> • Total Extractable Petroleum Hydrocarbons as diesel, kerosene, motor oil (TEPH-D, <br /> K, MO) by EPA method 3540/8015 (m) <br /> • BTEX by EPA method 8020 <br /> • TPH-G by EPA method 8015(m) <br /> The detection limits for these compounds are listed below. A Chain of Custody will be <br /> completed for all samples collected and tracked to ensure sample integrity. <br /> DetectionLimits: BTEX TPH-Ci '1hFH-D, K,M0 <br /> Soil (ug/Kg) <br /> 3.0 SCHEDULE & REPORTING <br /> The drilling is tentatively scheduled for November 3, 1999. To meet this time frame, we <br /> need the work plan to be approved and a boring permit issued by October 28, 1999. <br /> Ray Kablanow of GTI will supervise the project. A copy of the report will be forwarded to <br /> SJC PHS/EHD. <br />