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1 <br />' 09 October 2000 <br /> • AGE-NC Project No 98-0534 <br />' Page 2 of 6 <br />' For preservation of each sample EPA method 5030 was followed, both ends of the Ieadmg or other <br /> selected sleeve were covered with Teflon sheets, capped and sealed with tape The samples were <br /> labeled, stored on ice and subsequently transported under chain-of-custody to McCambell Analytical, <br />' Inc (MCAI), a State of California Department of Health Services (DHS)-certified analytical <br /> laboratory <br /> Auger returns generated by drilling were stored on-site in Department of Transportation (DOT)- <br /> approved 55-gallon drums, pending laboratory analysis <br />' <br /> 22 WELL AND BORING COMPLETION <br />' Borings MW through MW8 were completed as ground water monitoring wells MW-1 through <br /> MW-8 using two-inch diameter PVC casing with 0 020-inch slotted screen installed from <br />' approximately 10 feet to 30 feet bsg and with blank casing extended to the surface The filter pack <br /> (No 2112 Lonestar sand) was installed from 8 feet to approximately 30 feet bsg in the bonngs A <br /> 2-foot bentonite-chip seal was then mstaIled above the filter pack and hydrated with five gallons of <br /> e water The wells were then grouted to near the surface with portland cement Water-tight, traffic- <br /> rated well boxes were installed over the wells As-built well diagrams are depleted on the boring logs <br /> in Appendix A <br /> 1 <br /> 2 3 MONITORING WELL DEVELOPMENT AND SAMPLING PROCEDURES <br /> 1 2 3 1 Monitoring Well Development and Surveying <br /> I On 28 July 2000, a Sohnst water level meter was used to measure the depth to ground water in <br /> monitoring wells MW 1 through MW8 After depth to ground water measurements, a minimum of <br /> 25 to 40 gallons of water were removed from each well using a steel bailer and PVC submersible <br />' two-stage pump Temperature, pH and conductivity of purged ground water were measured at 5- <br /> gallons, using a Hydac water analyzer The field data and field sheets are included in Appendix B <br /> I Purged water was temporarily stored on-site in 55-gallon DOT-approved H-17 storage drums <br /> pending proper disposal <br /> The casing elevation of each well installed for the investigation was surveyed relative to well MW-1 <br /> with a relative elevation of 5 00 feet On 02 August 2000, AGE surveyed a reference point on the <br /> top of each ground water monitoring well at the site to the nearest 0 01-foot The results of the <br /> monitoring well survey are contained in Table 1 <br /> • <br /> Advanced GeDEnvironmental,[nc <br />