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' 10 February 2006 . AGE-NC Project No 02-0977 ' Page 2 of 12 ' 2.0. PROCEDURES In December 2005, one soil boring (135), four SVE wells (VW-1 through VW-4) and one ground ' water monitoring wells (MW-8) were installed at the site under San Joaquin County Environmental Health Department(SJCEHD)drilling permit(Appendix A) Fieldwork was performed in accordance with the AGE-prepared Revised Site Assessment Work Plan, dated 28 February 2005, and approved ' by the SJCEHD by letter dated 12 August 2005 (Appendix A) I21 MONITORING WELL INSTALLATION PROCEDURES On 09 and 13 December 2005,six soil borings(B5 through B9 and MW-8)were drilled at the site to ' maximum depths of 70 feet bsg The soil borings for B6,B7, B8 and B9 were completed as two-inch diameter SVE wells VW-2, VW-1, VW-3 and VW-4, respectively, the soil boring for MW-8 was completed as a two-inch diameter ground water monitoring well Drilling was performed by Cascade IDrilling, Inc utilizing either a CME-75 high torque, truck-mounted drill rig or a CME-75 limited-access drill rig (LAR), both equipped with 8-inch diameter hollow-stem augers All soil cuttings generated from drilling activities were containerized in properly labeled California ' • Department of Transportation(DOT)-approved model 17H 55-gallon drums and stored at the north section of the site, soil boring and well locations are depicted in Figure 2 I 2 1 1 Soil Sampling and Analysis ' Discrete soil samples were collected at 5-foot intervals(between 5 and 70 feet bsg) from borings B5 through B-9, soil samples were collected at 5-foot intervals(between 5 and 65 feet bsg) from boring ' MW-8 Soil samples were collected from B5 through B9 and MW-8 utilizing a California split-spoon sampler loaded with 2-inch by 6-inch brass sleeves,the sampler was driven by dropping a 140-pound weight from a height of 30 inches The number of blows 'required to drive each 6-inch length of the ' sampler (blow counts) was recorded on boring logs by an AGE geologist, boring logs are in j Appendix B j I ' Soil samples were preserved by covering both ends of the second brass sleeve with Teflon sheets,then capping and sealing the ends with tape Each preserved sample sleeve was labeled with soil boring designation, depth, time, date and sampler's initials IEach preserved soil sample was logged on a chain-of-custody form,placed in a chilled container and transported to Cal Tech Environmental Laboratories (CTEL), a California Department of Health Services (DHS)-certified laboratory, selected samples were analyzed for IAdvanced GeoEnvironmentsi,Inc I