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'fNti , Tli �AC��� <br /> h EE ! pp Working To Restore Nature <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Phone (209) 838-3507 <br /> FAX (209) 838-3509 <br /> November 2, 1994 <br /> 150059.01 <br /> Ms. Mary Meays <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O Box 2009 <br /> Stockton, CA 95201 <br /> Subject Status Update Report, McAllister Trust, 601 S Ventura St , Stockton, CA <br /> Ms Meays. <br /> This letter report is submitted on behalf of McAllister Trust to summarize recent activities <br /> conducted at the subject site (Plate 1) Activities performed included monitoring depth to <br /> water in wells MW2, MW3, and MW4, purging and sampling wells MW2, MW3, and MW4, <br /> sampling groundwater in the excavation pit, and sampling soil stockpiled on site <br /> Groundwater was not monitored or sampled from well MW1, because this well was destroyed <br /> during excavation activities <br /> GROUNDWATER MONITORING AND SAMPLING <br /> On September 26, 1994 A RESNA Industries Inc (RESNA) technician measured the depth to <br /> groundwater in monitoring wells MW2, MW3, and MW4 using an electronic water level <br /> probe Groundwater was present in site wells at 15 39 to 17 43 feet below surface grade <br /> Groundwater generally flows to the southeast at a gradient of approximately 0 01 (53 ft /mi.) <br /> A potentiometric surface map of the shallow water bearing zone is shown on Plate 2 <br /> Groundwater monitoring data are summarized in Table 1 <br /> Subsequent to water level measurements, a minimum of three casing volumes of water were <br /> purged from each well (MW2, MW3, MW4) using pre-washed dedicated bailers or pumping <br /> systems. Physical parameters (pH, conductivity, temperature) were monitored in each well <br /> and allowed to stabilize prior to sampling Well purge logs and groundwater monitoring data <br /> are included in Attachment 1 <br /> 1500591SR102794 doc <br />