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WALLACE • KUHL October 16, 1996 <br /> &ASSOCIATES INC. <br /> Mr Gary Weinberger <br /> JVM Associates �C <br /> 5601 W Mohave 00T 181996 <br /> Phoenix, Anzona 85031 <br /> EN P� �E1�1110ES� <br /> � <br /> QUARTERLY STATUS REPORT <br /> 781 SWIFT WAY <br /> Stockton, California 95206 <br /> WKA No 173 5 02 <br /> Dear Mr Weinberger, <br /> As requested by the San Joaquin County Public Health Services, we are submitting <br /> this quarterly status report for the subject property, located at 781 Swift Way in <br /> Stockton, California (Plate 1) <br /> E <br /> t <br /> Ground water elevationeasurements of the six on-site monitoring wells were <br /> taken on July 30, 1996 The groundwater flow direction/was calculated to be <br /> norther with a gradient of 0 0017 feet per foot <br /> f'r Geotechnical Engineering After obtaining the depth to water measurements from each well, it was observed <br /> ,k <br /> that groundwater had risen above the screened interval in five of the six wells <br /> Engineering Geology <br /> ,p <br /> From previous data collected, we suspected that this might occur, and had <br /> Environmental Consulting contacted San Joaquin County prior to the sampling event During our <br /> conversation with San Joaquin County, it was again decided that pumping the <br /> Remediation Services <br /> groundwater surface down below the screened interval prior to sampling should be <br /> I Construction Inspection attempted This was successfully completed on monitoring wells MW 1, MW4, and <br /> f , MW6 <br /> l Materials Testing <br /> Prior to sampling, the water level in each well was measured and checked for visual <br /> i signs of free product using a clear bailer Approximately three well volumes of <br /> Fater were purged from each well using a two-inch diameter submersible pump <br /> 3050 Industrial Blvd <br /> until temperature, pH, and conductivity readings stabilized and/or the water cleared <br /> West Sacramento <br /> of sediment The water samples were then collected using a new polyethylene <br /> CA 95691 disposable bailer Water from the disposable bailer was decanted into appropriate <br /> Fax 916 372 2565 sample containers provided by the laboratory <br /> R 916 372 1434 <br /> Recycled paper <br />