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1' <br /> Date April 15, 2005 <br /> TEICHERT (STOCKTON) QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility Address 103 North E Street, Stockton, California <br /> Consulting Co/Contact Person Stratus Environmental, Inc 1 Jay Johnson, P G <br /> Consultant Project No 2001-0103-01 <br /> Primary Agency/Regulatory ID No Harlin Knoll/San Joaquin County Public Health Services 1 1555 <br /> WORK PERFORMED THIS QUARTER(First 2005) <br /> 1 Stratus monitored groundwater elevations and collected groundwater samples from wells MW-13, <br /> MW-14, and AS-1 on March 15, 2005 Wells MWA and VW were dry <br /> 2 Stratus compiled and evaluated groundwater monitoring data <br /> 3 Bio-venting was shutoff on March 1, 2005, when the property tenant left the site Service was <br /> restored on March 14, 2005 <br /> WORK PROPOSED FOR NEXT QUARTER(Second 2005) <br /> 1 The next sampling event is tentatively scheduled for June 2005 Groundwater samples will be <br /> • collected for laboratory analysis from wells MWA, MWA 3, MW-14, VW, 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 LUFT Manual, and for benzene, <br /> toluene, ethylbenzene, total xylenes (BTEX), methyl tertiary butyl ether (MTBE), tertiary amyl methyl <br /> ether (TAME), ethyl tertiary butyl ether (ETBE), di-isopropyl ether(DIPE), tertiary butyl alcohol (TBA), <br /> 1,2-dichloroethane (1,2-DCA), and 1,2-dibromoethane (EDB) by EPA Method SW8260B <br /> 3 Stratus will visit the site monthly to optimize system performance and perform maintenance if <br /> warranted <br /> Current Phase of Project Monitoring I Remediation <br /> Frequency of Groundwater Sampling All Wells=Quarter) <br /> Frequency of Groundwater Monitoring Quarterly <br /> Groundwater Sampling Date March 15, 2005 <br /> Is Free Product(FP) Present on Site No <br /> FP Recovered This Quarter NA <br /> Cumulative FP Recovered to Date NA <br /> Approximate Depth to Groundwater 50 85 to 60 13 feet below top of well casing <br /> Groundwater Flow Direction NA <br /> Groundwater Gradient NA <br /> K MichertlStockton-1031Quarter1y120051Teichert_1 Q05 DOC 5TRATU5 <br />