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r <br /> DEPARTMENT <br /> SAN <br /> ENVIRONMENTAL HEALTH <br /> Pa•�'N SAN JOAQUIN COUNTY <br /> Unit Supervisors <br /> o N c Carl BorgmaD,R.E.H.S. r <br /> R.E.H.s. Third Floor <br /> Donna K.lleran, 304 East Weber Avenue, Mike Huggins,R.E.H.S.,R.D.I. <br /> Director <br /> All Olseti,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.F.H.S. { <br /> P <br /> V. <br /> Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.H.S. <br /> j Program Manager Fax: (209) 464-0138 Mark Barcellos,R.E.H.S. 4 <br /> Fkf <br /> i, <br /> MAR 14 2003 <br />� JAMES <br /> GIOTTONINI <br /> PUBLIC WORKS DIRECTOR <br /> CITY OF STOCKTON <br /> 425 N EL DORADO <br /> STOCKTON CA 95202 k <br /> RE: City of Stockton sites in the Local Oversight Program <br /> A meeting was held on March 6,2003,at the office of San Joaquin County Environmental Health Department(EHD)_ <br /> t Attending the meeting were Sharla Hardy,Wayne Smith,and you representing City of Stockton(C05),William Little <br /> representing Advanced GcoF-nvironmental,Inc.(AGE),William Shipp representing ATC Associates(ATC),and Nuel C. <br /> Henderson,and Jeff Wong representing El-ID. The following is a summary of the site discussions at the meeting. <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 i <br /> since the installation of monitoring well M),V7 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 /> per liter(pg/1). EHD will consult Regional Water Quality Control Board(RWQCB) for potential site closure <br /> status. <br /> l <br /> 110 W.Sonora <br /> MW5 was installed on March 3,2003 to investigate the contamination in the lower water-bearing zone. AGE <br /> proposed performing base line testing and initiating operation of the ozone sparging system by April 1,2003, <br /> 1740 Houston <br /> EHD received Fourth.Quarter2002 dated February 7,2003 prepared by AGE. Methyl tent butyl ether(NITBE) <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 66 lig/l. MTBE was also detected in TNIW-10 at 8.6 pg/l,which is the most northern well at the <br /> site. MTBE also continued to be detected in MW-4 at 91 gg/l and in N1W-6 at 75 pg/l. Analytical results of the <br /> groundwater samples from September 2002 previously reported in the Third Quarter 2002 were missing in'fable <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 /> i <br /> Donna Heran,REHS,Director <br /> Environmental Health Department - <br /> Margaret Lagono,Supervising RENS <br /> Site Mitigation Unit <br /> c: CVRWQCB—James L.L.Barton,RG <br /> AGE-Bill Little <br /> ATC—William Shipp <br /> n <br />