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H2 0GEOL o <br /> . A GROUND WATER CONSULTANCY 2005 DEC 30 RP111. 9 <br /> SAN 1D, r--ItJII' COUNTY <br /> ENYI-()"�f�j��' ¢L <br /> Mr Harlan Knoll, R E.H S I10e1 �3Y, tF�E N T <br /> Senior Registered Environmental Health Specialist <br /> San Joaquin County Environmental Health Department <br /> 304 E Weber Avenue, Third Floor <br /> Stockton, CA 95202-2708 <br /> RE Static Water Level Monitoring of Wells MW-1, MW-2, and MW-4 November 30 <br /> to December 05, 2005 - Assessment of Hydraulic Continuity/ Sanitary Seal <br /> Hydraulic Integrity of Thornton Municipal Supply Well No 2 With Respect to <br /> the Aquifer Shallower Than 30 Feet - Former Donna Gardner Property, <br /> 26056126080 North Thornton Road, Thornton, CA <br /> Dear Mr Knoll, <br /> This report on the monitoring and assessment of water levels in monitoring wells MW-1, <br /> MW-2, and MW-4 at the former Donna Gardner Property, located at 26056/26080 North <br /> Thornton Road in Thornton between Wednesday,November 30 and Monday, December <br /> • 05, 2005 is submitted by H2OGEOL on behalf of R. B Construction, Inc. The site <br /> location is shown on Figure 1 Diagrammatic site area features and former features and <br /> the locations of the monitoring wells as shown on previous consultants' reports are <br /> shown in Figure 2 <br /> This effort had been included as a task in the"Work Plan to Further Define the Lateral <br /> and Vertical Extent of Contamination and Access the Risk to Thornton Municipal Well <br /> No 2 - Former Donna Gardner Property, 26056/26080 North Thornton Road, Thornton, <br /> CA" submitted on November 29, 2005 <br /> The depth to water in each monitoring well was manually measured prior to placing <br /> submersible pressure transducers in the selected monitoring wells on October 30, 2005 <br /> between 11 02 and 1107 hours Manual water level measurements were again made <br /> between 14 23 and 14 29 on December 05, 2005 immediately prior removal of the <br /> transducers. <br /> Depths to water were measured to+/- 0.01 feet using a Solmst Model water level meter <br /> The depths to water were converted to potentiometrnc surface elevation by subtracting the <br /> -measured depths to water from the casing top elevations reported in the September 29, <br /> 2003 groundwater monitoring report submitted by Environmental Restoration Services <br /> Previous water level measurements have been included in the Fourth Quarter 2005 (and <br /> previous) Groundwater Monitoring Report <br /> • <br /> P 0 Box 2165 ■ Livermore,California 94551-2165 ■ (925)373-9211 <br />