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Mr Ron Rowe <br /> Api 1127, 1998 CAMB RTA <br /> . Sediment Lithology Primarily sandy silt underlain by silts or clayey silts and sands, to the total <br /> depth explored of 36 ft (Attachment B) <br /> Well Materials The wells were constructed using two-inch diameter, schedule 40 PVC well <br /> casing and 0 010-mch slotted well screen (Attachment B) <br /> Screened Interval Well MW-1 was screened from 11 5 to 31 5 ft below grade, and wells MW-2 <br /> and MW-3 were screened from 25 5 to 35 5 ft below grade (Attachment B) <br /> Well Development These monitoring wells will be developed, purged, and sampled by Blaine <br /> Tech Services, Inc (Blaine) of San Jose, Cdllfomla in April 1998 The <br /> SJCPHS will be given 48-hour notice befoie the wells are developed <br /> Well Survey A California registered land surveyor will survey the top-of-casing (TOC) <br /> elevations <br /> Soil Chemical Analyses Based on Cambria's work plan and field observations, selected soil samples <br /> were analyzed for the following chemical parameters <br /> • TPHg by modified EPA Method 8015, <br /> • Benzene, toluene, ethylbenzene and xylenes (BTEX) by EPA Method <br /> 8020, <br /> . Y Methyl tert-butyl ether (MTBE), tent-amyl methyl ethei (TAME), <br /> di-isopropyl ether(DIPE),ethyl tert-butyl ether(ETBE), tert-Butanol, <br /> and ethanol using EPA Method 8260, and, <br /> Methanol by modified EPA Method 8015 <br /> Soil Physical Analyses Based on Cambria's work plan and held observations, selected soil samples <br /> were analyzed for the following physical parameters permeability, porosity, <br /> density, and organic carbon content <br /> Soil Disposal Soil cuttings produced during well installation were stockpiled and sampled <br /> for profiling Upon acceptance at an approved facility, Shell will arrange for <br /> transportation offsite <br /> Analytical Results <br /> Soil Analytical Results TPHg was detected in two of the five soil samples from well MW-1, with a <br /> maximum concentration of 19 mg/kg Benzene was below detection limits in well MW-1, while toluene was <br /> detected in one sample at 0 020 mg/kg, ethylbenzene in one sample at 0 016 mg/kg, and xylenes in two <br /> . samples with a maximum concentration of 0 17 mg/kg MTBE was detected in one sample from well MW-1 <br /> at 0 22 mg/kg Methanol was detected in two of the samples from well MW-1, with a maximum concentration <br /> 3 <br />