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ENVIRONMENTAL HEALTH DEPARTMENT <br /> '" SAN JOAQUIN COUNTY <br /> 1. so moa Unit Supervisors <br /> Donna K.Heran 304 East Weber Avenue, Third Floor R.E.H.S: Carl Bergman,R.E H S. <br /> < Director Mike Huggins, E H S., D.I. <br /> At Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas w Wilson,R.E.H.S..x.s <br /> �...� :..w Program Manager Telephone: (209)468-3420 Margaret Lagorio,R.E.H.S. <br /> 40ov Laurie A.Cotulla,R.E.H.S. Robert McClellan,R.E.H.S, <br /> Program Manager Fax: (209)4640138 Mark Barcellos;R.E.H.S. <br /> JAMES GIOTTONINI OCT 2 d ZOOS <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 October 23,2003,at the office of San Joaquin County Environmental Health <br /> i <br /> Department(EHD). Attending the meeting were Sharla Hardy,Wayne Smith,and you representing City of <br /> Stockton(COS),William Little representing Advanced GeoEnvironmental,Inc.(AGE),Jeanne Homsey <br /> representing ATC Associates(ATC),and Margaret Lagorio and Jeff Wong representing EHD. The following is <br /> a summary of the site discussions at the meeting. <br /> Fontana Drive at Smith Canal ` <br /> The City of Stockton Municipal Utilities District has terminated their dewatering activities near the <br /> site. The analytical result for total petroleum hydrocarbons as diesel(rPH-d)in the water sample <br /> collected from the only consistently contaminated monitoring well,MW-4,which was collected after <br /> the dewatering activities is 85 milligrams per liter(mg/1),which is a significant drop in the TPH-diesel <br /> concentration. Results of all the other monitoring well samples were non-detect. EHD will submit <br /> request for concurrence on our no further action required determination for this site to the Central <br /> Valley Regional Water Quality Control Board. <br /> 110 W.Sonora <br /> Ozone sparging remediation for the site contamination started on July 28,2003. Analytical results of <br /> the water sample from vapor well V W2d increased in concentration. Ozone sparging will continue for <br /> another 3 months. I£concentrations continue to increase or remain the same(no dissolved mass <br /> reduction),installation of manufacturer designed ozone diffuser wells or other clean up technology <br /> may be required. <br /> 1740 Houston <br /> The dissolved plume has been defined and EHD has reviewed a fate and transport model <br /> that estimates the potential extent of migration and degradation of the plume. EHD will submit a <br /> request for concurrence on our no further action required determination for this site to the Central <br /> Valley Regional Water Quality Control Board. <br /> The next quarterly meeting with the City of Stockton to discuss the status of their sites is scheduled for 10:00 <br /> a.m.on January 22,2003,at the offices of EHD. <br /> Donna Heran,REHS,Director .. <br /> Environmental Health Department <br /> Margaret Lagori�pervismg RENS <br /> Site Mitigation Unit <br /> c: CVRWQCB-James L.L.Barton,RG <br /> AGE-Bill Little <br /> ATC-Jeanne Homsey. <br />