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.S• ,,[ �'` h+.M'Y' +� � `Y'K A'.;�� nya`+- a ^'t '4., 'i - +=3j <br /> i� <br /> Work Plan May 17, 1991 <br /> ARCO Service Station No. 2168,Stockton, California AGS 31009-1 <br /> hydrocarbeneous soil may be returned to the tank cavity and vapor-extraction wells installed <br /> if the VET indicates the vapor extraction is a feasible remediation method at this site. A <br /> r+ vaporextraction system would be installed a td managed until the hydrocarbon <br /> concentrations are reduced to levels acceptable by the SJPHS to remain in place. <br /> nisoosal of Soil Ca�1� <br /> w - <br /> Soil cuttings generated during drilling will be stored onsite and covered with plastic sheeting. <br /> If possible. drill cuttings exhibiting subjective evidence of gasoline hydrocarbons or <br /> ►' producing a positive response on the PID will be separated from those drill cuttings <br /> evaluated as having no gasoline hydrocarbons. At ARCO's request, we will submit soil <br /> samples to the GSX Lokem Facility in Buttonwillow, California, for a profile analysis. <br /> ARCO will be responsible far the disposal of the cuttings. We will apprise ARCO of <br /> disposal options after receivip!; laboratory analyses. <br /> LABORATORY ANALYSES OF SODL SAMPLES <br /> M <br /> Soil samples collected at 10- to 15-foot 'intervals and the two bottom samples from each <br /> boring will be submitted to a laboratory approved by ARCO and certified by the State of <br /> CaUcrnia. Soil samples will be analyzed for TPHg by Environmental Protection Agency <br /> W (EPA)Extraction Methods 5030 and Preparation Method 8015 and BTEX by modified EPA <br /> 'Method 8020. The sample collected nearest the leaded gasoline tank will also be aziaiyzed <br /> for total lead by EPA Method 6010. <br /> E <br />