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Clayton <br /> ENVIRONMENTAL <br /> CONSULTANTS <br /> Page 2 of 3 <br /> Analytical Results <br /> for <br /> Pacific Gas & Electric Company <br /> Client Reference: MCDONALD ISLAND <br /> Clayton Project No. 97102 . 91 <br /> Sample Identification: GAS WELL 18W-1C Date Sampled: 10/28/97 <br /> Lab Number: 9710291-01A Date Received: 10/28/97 <br /> Dample Matrix/Media: SOIL Date Extracted: 10/28/97 <br /> :xtraction Method: EPA 3550 Date Analyzed: 10/29/97 <br /> Method Reference : EPA 8015 (Modified) Analyst: CTS <br /> Limit <br /> of <br /> Concentration Detection <br /> analyte CAS # (mg/kg) (mg/kg) <br /> Total Extractables <br /> Total-Extractables -- 140 4 <br /> 0ur <br /> PH-Oil -- ND 200a <br /> rogates Recovery M OC Limits M <br /> p-Terphenyl 92-94-4 90 50 - 150 <br /> 7D: Not detected at or above limit of detection <br /> --. Information not available or not applicable <br /> tesults are reported on a wet weight basis, as received. <br /> Potal Extractables = Extractable hydrocarbons from C10 to C42 quantitated as diesel. <br /> TPH-0 = Extractable hydrocarbons, that appear to match the typical oil pattern from C20 to C42 <br /> ;uantitated as oil. <br /> Tote: Detection limits increased due to dilution necessary for quantitation. <br /> a Oil detection limit increased due to presence of unknown hydrocarbons. <br />