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Date April 23, 2003 <br /> TEICHERT (STOCKTON) QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility Address: 103 North E Street, Stockton, California <br /> Project Supervisor: George Takernori <br /> Consulting Co./Contact Person: Stratus Environmental, Inc. 1 Jay Johnson <br /> Consultant Project No: 2001-0103-01 <br /> Primary Agency/Regulatory ID No: Harlin Knoll 1 San Joaquin County Public Health Services <br /> WORK PERFORMED THIS QUARTER(First 2003): <br /> 1. Stratus monitored groundwater elevations and collected groundwater samples from wells MW-13, <br /> MW-14, and AS-1 on March 18, 2003. <br /> 2. Stratus compiled and evaluated groundwater monitoring data. <br /> WORK PROPOSED FOR NEXT QUARTER (Second 2003): <br /> 1. The next sampling event is tentatively scheduled for June 2003. Groundwater samples will be <br /> collected for laboratory analysis from wells MW-1, MW-13, MWA 4, and AS-1. <br /> 2. Groundwater samples will be analyzed at a state-certified analytical laboratory for total petroleum <br /> hydrocarbons as gasoline (TPHG) by EPA Method SW8015BIDHS LOFT Manual, and for benzene, <br /> toluene, ethylbenzene, total xylenes (BTEX), methyl tert-butyl ether (MTBE), tertiary amyl methyl <br /> ether (TAME), ethyl tertiary butyl ether(ETBE), di-isopropyl ether(DIPS), tertiary butyl alcohol (TBA), <br /> 1,2-dichloroethane (1,2-DCA), and 1,2-dibromoethane (EDB) by EPA Method SW8260B, and for <br /> total lead by EPA Method SW200.8. <br /> Current Phase of Project: Monitoring <br /> Frequency of Groundwater Sampling: All Wells =Quarterly <br /> Frequency of Groundwater Monitoring: Quarterly <br /> Groundwater Sampling Date: March 18, 2003 <br /> is Free Product(FP) Present on Site: No <br /> FP Recovered This Quarter: No <br /> Cumulative FP Recovered to Date: NA <br /> Approximate Depth to Groundwater: 50.26 to 50.40 feet below top of well casing <br /> Groundwater Flow Direction: NA <br /> Groundwater Gradient: NA <br /> P ATeichert\Stockton-1031Quarter1y120031Teichert_1 Q03,DOC 5rRATU5 <br />