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City of Stockton <br /> Page 2 i <br /> i I <br /> 1740 Houston ' <br /> MW-9 and MW-10 were installed in February 2002 to define the extent of. <br /> the MTBE groundwater plume as proposed in Work Plan Addendum <br /> dated November 19, 2001 prepared by AGE. Analytical results of the <br /> grab groundwater samples collected between 50 to 60 feet below surface <br /> grade (bsg) from boring B8 and B9 were 210 µg11 and 48 µg11 of MTBE, <br /> respectively, but samples from below 60 feet bsg were either non-detect <br /> or not above primary or secondary maximum contaminant levels. One <br /> quarterly monitoring event has been conducted. EHD requests three <br /> consecutive quarterly sampling events. <br /> 1465 S. Lincoln <br /> Report to be reviewed and discussed with Central Valley Regional Water <br /> Quality Control Board (CVRWQCB). <br /> As an update to the meeting discussion, EHD has submitted a request for <br /> concurrence on a "no further action required" determination from the <br /> CVRWQCB. <br /> A meeting with the City of Stockton to discuss the status of their sites at that time <br /> is scheduled for 10:00 a.m. on July 11, 2002, at the offices of EHD. <br /> If you have any comments or questions contact Margaret Lagorio at (209) 468- <br /> 3449 or the EHD site manager. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Margaret Lagorio, Supervising REHS <br /> Site Mitigation Unit <br /> c: CVRWQCB - Marty Hartzell <br /> AGE - Bill Little <br /> ATC - Jeanne Homsey <br /> i <br />