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ATC Associates,Inc Project No 99975 7501 <br /> the vacuum in the extraction well is only about 3 inches of mercury (39 inches of water) This <br /> ' attests to the relatively high degree of gas permeability in the soil surrounding the well Using <br /> supersensitive magnahelix vacuum gauges, the most notable vacuum effect was observed in <br /> monitoring well BEI-MW I located approximately 40 feet from the co-extraction well A <br /> ' differential of 0 3 inches of water was observed between the vacuum measured in the well and <br /> ambient air pressure The vacuum differential for BEI-MW3, located only about 10-12 feet <br /> from the extraction well was only 0 12 inches of water The vacuum influence between co- <br /> extraction well EW-1 and monitoring well BEI-MW2 was evident but even smaller having a <br /> differential of 0 01 inches of water <br /> ' 5.0 SELF-MONITORING PROGRAM <br /> SCHEDULE <br /> ' The next quarterly groundwater monitoring event is scheduled for early July 1999 <br /> ' 60 CERTIFICATION <br /> ' This report has been reviewed and approved by the client or responsible party To the best of <br /> our knowledge, all statements and information provided in this report are true and correct <br /> Vk���-�-� —� SAD GEo <br /> Ronald W Michelson, R G 3875 `y� <br /> Principal Geologist 44 �4 C <br /> ' c o <br /> No 3875 ' d <br /> 7.0 DISTRIBUTION _0 �/,a <br /> �v <br /> ' Value Reclamation Corporation Of cAOF° <br /> 4318 Valley Avenue, Suite B <br /> Pleasanton, CA 94566 <br /> Mr Jeff Long <br /> ' Environmental Health Specialist <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> ' 304 E Weber Avenue, 3rd Fluor <br /> Stockton, CA 95201-0388 <br /> ' Mr Steve Mort <br /> Don's Mobile Glass <br /> ' 1424 H Street <br /> Groundwater Monitoring and Remediation Status R-.port Page 4 <br />