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Date February 12, 2003 <br /> TEICHERT (STOCKTON) QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility Address: 103 North E Street, Stockton, California <br /> Project Supervisor: George Takemori <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(Fourth 2002): <br /> 1. Stratus collected groundwater samples from wells MWA3 and MW-14 on December 13, 2002. <br /> 2. Stratus compiled and evaluated groundwater monitoring data. <br /> WORK PROPOSED FOR NEXT QUARTER(First 2003): <br /> 1. The next sampling event is tentatively scheduled for March 2003. Groundwater samples will be <br /> collected for laboratory analysis from wells MW-1, MWA 3, MW-14, and AS-1. <br /> 2. Groundwater samples will be analyzed at a state-certified analytical laboratory for total petroleum <br /> hydrocarbons as diesel (TPHD), and total petroleum hydrocarbons as gasoline (TPHG) by EPA <br /> Method SW8015BIDHS LUFT Manual, and for benzene, toluene, ethylbenzene, total xylenes <br /> (BTEX), methyl tert-butyl ether (MTBE), tertiary amyl methyl ether (TAME), ethyl tertiary butyl ether <br /> (ETRE), di-isopropyl ether (DIPE), tertiary butyl alcohol (TBA), 1,2-dichloroethane (1,2-DCA), and <br /> 1,2-dibromoethane (EDB) by EPA Method SW8260B, and for 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: December 13, 2002 <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: 51.62 to 51.80 feet below top of well casing <br /> Groundwater Flow Direction: NA <br /> Groundwater Gradient: NA <br /> • <br /> PATeichert\Stockton-1431Quarterly120021Teichert_4Q02.DOC STRATUS <br />