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Page 46 <br /> ' 2 . 0 PROPOSED EXCAVATION WORK PLAN <br /> Observation duringthe removal of the two 12 000 gallon <br /> ' petroleum storage tanks on June 15, 1993, revealed <br /> contaminated soil at the perimeter and below the tank. The <br /> contamination appeared to be predominately located beneath <br /> the pump island location. The tanks did not have detectable <br /> holes or damage. <br /> The following sequence of work is intended to mitigate <br /> ' contaminate soils All activities will be overseen by WHF <br /> Environmental Consulting, Inc P.0 Box 6729 , Modesto, CA <br /> 95355, Phone (209) 579-8138 Additionally work shall be <br /> ' coordinated with San Joaquin County Public Health Services, <br /> Environmental Health Department <br /> ' 1 Excavate contaminated soils starting near the point of <br /> release to a maximum depth of 19 feet (See plate #2 1 <br /> for overview) San Joaquin County Flood control and <br /> Water Conservation District map from the Spring of 1983 <br /> indicates the ground water level to be approximately - <br /> 20 feet at the sub0ect location <br /> ' 2 The excavated spoils will be stockpiled on site and <br /> covered with 6 mil black plastic sheeting pending <br /> ' disposal or treatment <br /> 3 Soil samples shall be taken during the excavation and <br /> screened on site with a P I D meter to minimize the <br /> extent of "over-excavating" <br /> ' 4 Confirmation samples will be taken from the excavation <br /> floor and sidewalls (See plates 2 2 and 2 3 ) and <br /> analyzed for TEPH-D, TPH-G, & BTX&E (see attached form <br /> ' eh 23-048 revised 7-10-92) All points for lead in the <br /> excavation were non-detectable We request lead be <br /> eliminated from the "Re-excavation" sampling protocol <br />