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k�E 1�y Elf 0 <br /> ENVIRU ';liE N r HE6I lj� February14, 2006 <br /> PERN16/SFRVICE9 <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 Coun Public Health Services/ 1555 <br /> WORK PERFORMED THIS QUARTER(Fourth 2005) <br /> 1 Stratus monitored groundwater elevations and collected groundwater samples from wells MW-13, <br /> MW-14, and AS-1 on December 20, 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(First 2006) <br /> 1 The next sampling event is tentatively scheduled for March 2006 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 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(DIPS), tertiary butyl alcohol (TBA), <br /> 1,2-dlchloroethane (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 /> 4 Stratus has scheduled the proposed CPT investigation for January 23, 2006 through January 31, <br /> 2006 <br /> Current Phase of Project Monitoring/Remediation <br /> Frequency of Groundwater Sampling All Wells= Quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Groundwater Sampling Date December 20, 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 42 to 55 23 feet below top of well casing <br /> Groundwater Flow Direction NA <br /> Groundwater Gradient NA <br /> K\Tcichert\Stockton-1031Quarterly120051Teichert_4Q05 DOC ST1Z14TU5 <br />