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ENVIRONMENTAL Uwe HEALTH DEPARTMENT <br /> o?au�N.•o SAN JOAQUIN COUNTY Unit Supervisors <br /> Carl Borgman,R.E.H.S. <br /> Donna K.Heran,R.E.H.S. 304 East Weber Avenue, Third Floor Mike Huggins,R_E.H.S.,R.D.I. <br /> Director California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> Al Olsen,R.E.H.S. Stockton, Margaret La orio,R.E.H.S. <br /> ._ `P• Program Manager Telephone: (209) 468-3420 Robert McClellon,R.E.H.S. <br /> Qui F0 Laurie A.Cotulla,R.E.H.S. <br /> Fax: (209) 464-0138 Mark Barcellos,R.E.H.S. <br /> Program Manager <br /> JAMES GIOTTONINI JUL 2 4 2002 <br /> PUBLIC WORKS DIRECTOR <br /> CITY OF STOCKTON <br /> 425 N EL DORADO <br /> STOCKTON CA 95202 <br /> RE: City of Stockton sites in the Local Oversight Program <br /> A meeting was held on July 11,2002,at the office of San Joaquin County Environmental Health Department <br /> (EHD). Attending the meeting were Sharla Hardy and you representing City of Stockton(COS),William Little <br /> representing Advanced GeoEnvironmental,Inc. (AGE),and Margaret Lagorio,Nuel C.Henderson,and Jeff <br /> Wong representing EHD. The following is a summary of the site discussions at the meeting. <br /> Fontana Drive at Smith Canal <br /> In a telephone conversation July 3,2002,your consultant for this site ATC&Associates informed <br /> EHD that there was laboratory error when the latest groundwater samples were analyzed so the <br /> sample collection and analysis will be performed again. Three more quarters of sampling are to be <br /> conducted. <br /> 110 W.Sonora <br /> The soil vapor extraction/air sparging(SVE/AS) remediation system has been in operation since <br /> October 2001. The concentration of Total Petroleum Hydrocarbons as gasoline(TPH-g)in the pre- <br /> carbon treatment vapor samples has dropped from a high of 1,400 micrograms per liter(µg/1)in <br /> November 2001 to X50µg/l in May 2002. AGE proposed augmenting the existing system with <br /> ozone injection. Submit a work plan for system augmentation to EHD by October 10,2002. <br /> EHD has not received a work plan for installation of additional discretely screened deep monitoring <br /> wells to evaluate the vertical extent of the contamination in groundwater as discussed in the previous <br /> meetings. <br /> 1740 Houston <br /> One round of quarterly sampling has been conducted(April 2002)at the site since installation of <br /> monitoring well 1VIW-9 and MW-10 in February 2002. Two more consecutive quarterly sampling <br /> events are required. <br /> A meeting with the City of Stockton to discuss the status of their sites at that time is scheduled for 10:00 a.m. <br /> on October 11,2002,at the offices of EHD. <br /> Donna Heran,RENS,Director ti <br /> Environmental Health Dep ent <br /> -Yyu� <br /> Margaret La rio,Supervising REHS <br /> Site Mitigation Unit <br /> c: CVRWQCB-Marty Hartzell <br /> AGE-Bill Little <br /> ATC-Jeanne Homsey <br />