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} rp <br /> Date July 6, 2005 <br /> TEICHERT (STOCKTON) QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility Address 103 North E Street, Stockton, California <br /> Consulting Cc /Contact Person Stratus Environmental, Inc /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/ 1555 <br /> WORK PERFORMED THIS QUARTER(Second 2005) <br /> 1 Stratus monitored groundwater elevations and collected groundwater samples from wells MW-13, <br /> MW-14, and AS-1 on May 27, 2005 Wells MWA and VW were dry <br /> 2 Stratus compiled and evaluated groundwater monitoring data <br /> 3 Stratus visited the site three times during the quarter to monitor operation of the bioventing system <br /> WORK PROPOSED FOR NEXT QUARTER (Third 2005) <br /> 1 The next sampling event is tentatively scheduled for August 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 SW8015B/DHS LOFT 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 (DIPS), 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 as <br /> warranted <br /> Current Phase of Project Monitoring/Remediation <br /> Frequency of Groundwater Sampling All Wells= Quarter! <br /> Frequency of Groundwater Monitoring Quarterly <br /> Groundwater Sampling Date May 27, 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 07 to 50 49 feet below top of well casing <br /> Groundwater Flow Direction NA <br /> Groundwater Gradient NA <br /> • <br /> K1TeicherMtockton-1031Quarterly120051Teichert_2Q05 DOC STKA7115 <br />