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20 March 1996 <br /> AGE-NC Project No 95-0130 <br /> Page 3 of 23 <br /> water flow beneath the site is towards the southeast <br /> 3.0 soli, VAPOR EXTRACTION AND MONITORING WELL INSTALLATION <br /> 3 1 DRILLING AND SAMPLING <br /> On 05 to 08 December 1995, three soil bonngs (VW-1 through VW-3) were advanced at the site <br /> utilizing a CME-55 truck mounted drill ng equipped with 10-inch diameter hollow stem augers The <br /> drill ng and two man crew were supplied by Soils Exploration Services, Inc (SES) of Benicia, <br /> California Each boring was advanced to a depth of approximately 63 feet bsg, and completed as a <br /> soil vapor extraction (SVE) well (see Section 3 4 ) Cuttings and nnseate generated during drilling <br /> activities were placed in properly labeled D O T model 17H 55-gallon drums and stored on-site in <br /> an area inaccessible to the general public Locations of the SVE wells are depicted on Figure 2 <br /> On 11 December 1995, soil boring MW-4 was advanced on-site, on 19 January 1996, soil boring <br /> MW-5 was advanced off-site Drilling was performed utilizing a CME-55 truck mounted drill ng <br /> equipped with 8-inch diameter hollow stem augers The drill rig and two man crew were supplied by <br /> SES <br /> Boring MW-4 was advanced to a depth of approximately 75 feet bsg, while soil boring MW-5 was <br /> advanced to a depth of approximately 70 feet bsg Both borings were completed as 2-inch diameter <br /> Iground water monitoring wells (see Section 3 4 ) Cuttings and nnseate generated during drilling <br /> activities were placed in properly labeled D O T model 17H 55-gallon drums and stored onsite in an <br /> area inaccessible to the general public Monitoring well locations are depicted on Figure 2 <br /> 1 fr m each bona at five-foot intervals utilizing a California soil samples were collected o ea g g p <br /> spoon sampler and brass sleeves The sampler was driven by dropping a 140-pound weight from a <br /> height of 30 inches The number of blows required to drive each 6-inch length of the sampler (blow <br /> counts) was recorded on boring logs, and are included in Appendix A <br /> Upon sample retrieval, the riddle brass sleeve was removed from the sampler Both ends of the <br /> sleeve were covered with Teflon sheets, capped and sealed with tape Each sample was labeled with <br /> the following boring location, depth, time, date, and sampler's initials The samples were placed in <br /> a chilled container and transported under chain-of-custody protocol to a California state-certified <br /> hazardous waste laboratory Selected soil samples were analyzed for TPH-g and BTE&X in <br /> accordance with EPA methods 8015 and 8020, respectively <br /> r <br />