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City of Stockton sites <br /> Page 2 <br /> 1740 Houston <br /> At the meeting in March 2000, it was agreed that additional monitoring <br /> wells should be installed between SB5 and MW4 and downgradient of <br /> MW4 to evaluate the extent of the MTBE contaminant plume. By the July <br /> 2000 meeting a work plan for this work had not been submitted to <br /> PHS/EHD. At the July 2000 meeting it was agreed that a deeper <br /> screened monitoring well should be installed in the vicinity of MW-4 to <br /> evaluate the vertical extent of the MTBE plume, and two additional <br /> shallow screened monitoring wells should be installed approximately 40 <br /> feet downgradient of MW-4 to evaluate the lateral extent of the shallow <br /> contaminant plume. This work plan should be submitted to PHS/EHD no <br /> later than July 31, 2000. <br /> 1465 Lincoln <br /> PHS/EHD will submit a request to the Central Valley Regional Water <br /> Quality Control Board for concurrence on a "no further action required" <br /> determination for the 12,000 gallon UST removed from this site. After <br /> discussion with PHS/EHD staff reviewing the closure plan for the 10,000 <br /> gallon UST piping, further information is required prior to approval of the <br /> closure plan. Enclosed is a letter from the City of Stockton stating that <br /> there was 100 feet of drain line (pipe) under the Garage floor and closure <br /> plans from CRA and AGE stating there was 40 feet of piping with <br /> drawings indicating an angle (joint) in the piping. The length of piping and <br /> any joints must be confirmed and then the number of soil samples and <br /> sampling points required can be determined. In the July 2000 meeting it <br /> was stated that sampling beneath one end of the piping had been <br /> performed previously. Review of PHS/EHD records indicates the only <br /> samples collected previously were directly beneath the UST. <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 December 4, 2000, at the offices of PHS/EHD. <br /> If you have any comments or questions contact Margaret Lagorio at (209) 468- <br /> 3449 or the PHS/EHD site manager. <br /> Donna Heran, REHS, Director <br /> Environmental Health <br /> VDivision <br /> Margaio, Supervising REHS <br /> Site Mitigation Unit <br /> Enc. <br /> c: CVRWQCB - Marty Hartzell w/o Enc. <br /> COS Public Works - John Fukomoto <br /> AGE - Bill Little <br /> ATC - Jeanne Homsey w/o Enc. <br />