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23 July 2004 <br /> • AGE-NC Project No 99-0624 <br /> IPage 2 of 8 <br /> rig and three-man crew were supplied by Cascade Drilling Incorporated of Rancho Cordova, <br /> California Auger returns generated by drilling were containerized in properly labeled Department <br /> of Transportation (DOT) approved model 17H 55-gallon drums and were stored on-site _ <br /> Soil samples were collected ahead of the drill bit using a California modified split-spoon sampler <br /> loaded with three pre-cleaned 2-inch by 6-inch brass sleeves The samples were collected from the <br /> pilot borings at 5-foot Intervals, beginning at 5 feet bsg, using a 140-pound hammer to advance the <br /> sampler The number of blows required to advance the sampler over each 6-inch increment of the <br /> 18-Inch sampling interval was recorded on the boring logs After sample recovery,both ends of the <br /> I second or other selected sleeve were covered with Teflon sheets, capped and sealed with tape The <br /> sample sleeves were labeled, stored on ice and transported under chain-of-custody to Cal Tech <br /> Environmental Laboratories (CTEL), a State of California Department of Health Services (DHS)- <br /> certified analytical laboratory <br /> The sampling equipment was washed In an Alconox solution and rinsed with water prior to each <br /> Isampling run to minimize cross-contamination <br />' . 212 Logging <br /> Soil was extruded from the second brass sleeve and screened for the presence of organic vapor using <br /> I an organic vapor meter (OVM) equipped with a photo-Ionization detector (PID Thermo <br /> Environmental 580B, 10 0 eV, calibrated to isobutylene), the OVM readings were recorded on the <br /> boring logs The soil was then visually described in accordance with the Unified Soil Classification <br /> I System (see Appendix B) <br /> I2 1 3 Well Completions <br />' Pilot boring MW5 was completed as a ground water monitoring well using 2-inch diameter PVC <br /> casing,with 0 020-inch slotted screen installed from approximately 45 feet to 65 feet bsg The filter <br /> pack (No 3 Lonestar sand) was installed from approximately 42 feet to 65 feet bsg, and a nominal <br /> I2-foot bentonite chip plug was then installed above the filter pack and hydrated The well was then <br /> grouted to near the surface with portland cement, and water-tight, traffic-rated well boxes were <br /> Installed over the wells As-built well diagrams are depicted on the boring logs in Appendix B <br /> I <br /> I <br /> Advanced Geo Environmental,Inc <br />