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23 September 1997 <br /> AGE-NC Project No 95-0184 <br /> ' Page 4 of 8 <br /> < Boring VW-2'was duel completed as a vapor extraction remediation well Two-inch slotted PVC <br /> screen was installed from 54 feet bsg to 44 feet bsg and blank PVC casing was extended to the <br /> surface The filter pack was Installed from 54 feet to 42 feet, and hydrated bentonite was installed <br /> from 42 feet bsg to 40 feet bsg A second screened PVC casing was installed from 40 feet bsg to 25 _ <br /> feet bsg A filter pack was installed from 40 feet to 23 feet and hydrated bentonite placed from 23 <br /> feet to 21 feet The well was then grouted from 21 feet bsg to the surface with portland cement <br /> IBorings VW-3 and VW-4 were completed as vapor extraction wells by installing 2-Inch diameter <br /> PVC casing with 0 020-Inch screen from 55 to 35 feet and from 53 5 to 33 5 feet,respectively Blank <br /> IPVC casing was then extended to the surface The filter pack was Installed from total depth to two <br /> feet above the screen Interval A two foot bentonite plug was Installed above the filter pack and the <br /> wells were grouted to the surface with portland cement <br /> r <br /> Boring VW-5 was triple completed as a vapor extraction well Slotted PVC screen was Installed <br /> from 55 feet to 45 feet bsg and blank PVC casing extended to the surface A filter pack was installed <br /> from 55 feet to 43 5 feet and a bentonite plug from 43 5 feet to 415 feet The second screen Interval <br /> was Installed from 415 feet to 26 5 feet and blank casing extended to the surface The filter pack was <br /> Installed from 41 5 feet to 25 feet and a bentonite plug Installed from 25 feet to 23 feet The third <br /> screen Interval was Installed from 23 feet to 13 feet and blank casing extended to the surface The <br /> filter pack was Installed from 23 feet to 11 feet and a bentonite plug placed from 11 feet to 9 feet <br /> The well was then grouted to the surface with portland cement <br /> 3 3 WATER DISPOSAL <br /> On 03 September 1996,water stored on-site from monitoring well purge procedures and decon water <br /> Ifrom soil boring Installations was disposed The water was transported by Nor Cal Oil of Denair, <br /> California to PRC Patterson, Inc In Patterson, California Approximately 200 gallons,of water were <br /> Idisposed The Hazardous Waste Manifest Is Included In Appendix,E, <br />' 3 4 GROUND WATER MONITORING - 24 JULY 1997 <br /> 3 4 1 Monitoring Well Purge Procedures <br /> IOn 24 July 1997, a Sollnst water level meter was used to measure the depth to ground water In five <br /> monitoring wells and five vapor wells at the site relative to the top of the well casing The relative <br />' ground water elevations, ground water flow direction and hydraulic gradient were determined from <br /> these data (Table 1) <br /> Advanced GeoEn\ironmental,ine <br />