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File No 20-3769-01 COI <br /> May 8, 1996 <br /> •l <br /> Groundwater Levels <br /> The depth to groundwater was measured in the three monitoring wells with an electric <br /> conductivity-based water level indicator on May 6, 1996 The water level probe was <br /> decontaminated in a trisodium phosphate (TSP) wash followed by a distilled water rinse, prior to <br /> use in each well Measurements were made to the surveyed mark on the north run of the <br /> monitoring well PVC casings Measurements were made to the nearest 0 01 foot The water <br /> Ievel measurements were converted to elevations using the surveyed casing elevations <br /> The groundwater elevations for May 6, 1996 data indicated a groundwater gradient of <br /> approximately 0 037 ft/ft toward the north/northeast The groundwater flow direction was <br /> found to be consistent with the previous sounding data <br /> Monitoring Well Observations <br /> Protocol for each monitoring well was as follows <br /> • The depth-to-water was measured using a conductivity-based water-level meter (protocol <br /> idescribed in the previous section) <br /> o A transparent single-use disposable bailer was lowered approximately half way mto the <br /> surface of the water standing in the well and then withdrawn to check for a petroleum layer <br /> or sheen on the water <br /> CONCLUSIONS <br /> Kleinfelder recommends that a copy of this report be submitted to the State of California <br /> Regional Water Quality Control Board (RWQCB) and the San Joaquin County Public Health <br /> Services Department Environmental Health Division (PHS/EHD) for their review and <br /> consideration <br /> 4. <br /> 20-3769-01 C011 8960094 Page 2 of 3 Copynght 1995,Klernfelder, Inc <br /> KLEI,IFELDER 2825 East,hlyrtleStreet Stockton CA 115203 4794 (209) 948-1345 (109) 948 0621 rat <br />