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'HEALTH DEPARTMENT <br /> ENVIRONMENTAL <br /> SAN JOAQUIN COUNTY Unit Supervisors <br /> PQuik, c <br /> Carl Borgman,R.E.H.S. <br /> TP?-.0 may_ o Third Floor <br /> �. -_ Mike Huggins,R.E.H.S.,R.D.1. <br /> z.;^ "� ?•2 Donna K.Heran,R.E.H.S. 304 East Weber Avenue, <br /> r ' Director Douglas W.Wilson,R.E.H.S. <br /> Stockton, California 952p2-270$ <br /> Al Olsen,R.E.H.S. ) 465-3420 Margaret hagorio,R.E.H. . <br /> P Program Manager Telephone: 209 Robert Mcclellon,R.E.H.S. <br /> • cgi`i g-0. Laurie A.Cutulla,R.E.H.S. Fax: (.209) 464-0138 Mark Barcellos,RI.H.S. <br /> i <br /> Program Manager l <br /> MAR 14 2003 <br /> . r <br /> JAMES GIOTTONINI <br /> PUBLIC WORKS DIRECTOR <br /> CITY OF STOCKTON <br /> 425 N EL DORADO <br /> STOCKTON CA 95202 <br /> k RE: City of Stockton sites in the Local Oversight Program <br /> i, office of San Joaquin County Environmental 1 Iealth Department{I I IDS <br /> A meeting was held on March 6,2003,at the o <br /> Attending the meeting were Sharla Hardy,Wayne Smith,and you representing City of Stockton(COS}`TChaand,Nuel C. <br /> rating Advanced GeoEnvironmentarescl,Inc. (AGE),William Shipp representin <br /> repg r1TC ilssociates(ATC), <br /> reproerson,and Jeff Wong representing EHD. The following is a summary of the site discussions at the meeting. <br /> Hend <br /> Fontana Drive at Smith Canal <br /> EHD received Fourth Quarter 2002 Site Status Report dated October 7,2002 and Third Quarter 2002 Site Status <br /> Report dated October 9,2002 prepared by ATC at the meeting. Five quarters of sampling have been conducted <br /> since the installation of monitoring well NIW7 in February 2002,which is the most northern down gradient well. <br /> Analytical results of the last four quarters of samples from MW7 have been non detect at below 50 micrograms <br /> er Quality Control Board(RWQCB) for potential site closure <br /> per liter(µg/1). EHD will consult Regional�'G`at <br /> status. <br /> 110 W.Sonora <br /> MW5 was installed on March 3,2003 to investigate the contamination in the lower water-bearing zoite. AGE <br /> proposed performing base line testing and initiating operation of the ozone sparging system by April 1,2003. <br /> 1740 Houston <br /> Fl-ID received Fourth.Quarter2002 dated February 7,2003 prepared by AGE. iblethyl tert butyl ether(MTBE) <br /> was detected for a second consecutive quarter in the deepest well MW-9 screened from 70 feet to 75 feet at a <br /> concentration of 66µg/1. MTBE was also detected in MW-10 at$.6 pg/l,which is the most northern well at the <br /> site. MTBE also continued to be detected in MW-4 at 91 pg/l and in MW-6 at 75 gg/1. Analytical results of the <br /> groundwater samples from September 2002 previously reported in the Third Quarter 2002 were missing in Table <br /> 2 of this latest quarterly report. <br /> EHD agreed with AGE's proposal to conduct another groundwater sampling event in March 2003. EHD also <br /> agreed to consult with RWQCB for direction of further investigation and status of the site. <br /> The next quarterly meeting with the City of Stockton to discuss the status of their sites is scheduled for 10:00 a.m.on July <br /> 24,2003,at the offices of EHD. <br /> Donna Heran,REI-IS,Director <br /> Environmental Health Department <br /> Margaret� Lagorio,Supervising REHS <br /> Site Mitigation Unit . <br /> c CVRWQCB—James L.L.Barton,RG f <br /> AGE-Bill Little <br /> ATC—William Shipp <br />