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• ENVIRONMENTAL HEALTH DEPARTMENT <br /> o u rN SAN JOAQUIN COUNTY Unit Supervisors <br /> Third Floor Carl Borgman,R B H S <br /> Donna K HeraorR E H 5 304 East Weber Avenue, Mike Huggins,R E H S,R D I <br /> Director <br /> Al Olsen,R E,H S Stockton, California 95202-2708 Douglas W Wilson,R E N S <br /> • c �P• Program Manager Telephone (209) 468-3420 Margaret Lagono,R E H S <br /> ani fioRr' Laurie A Cotulla,R E H 5 Fax (209) 464-0138 Robert McCiellon,R E H S <br /> Program Manager Marc Barcellos,R E H S <br /> JAMES GIOTTONINI MAY 0 12002 <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 April 11 , 2002, at the office of San Joaquin County <br /> Environmental Health Department (EHD) Attending the meeting were Sharla <br /> Hardy, Wayne Smith and you representing City of Stockton (COS), William Little <br /> representing Advanced GeoEnvironmental, Inc (AGE), Jeanne Homsey <br /> representing ATC Associates (ATC), and Margaret Lagorio, Nuel C Henderson, <br /> and Jeff Wong representing EHD The following is a summary of the site <br /> discussions at the meeting <br /> • Fontana Drive at Smith Canal <br /> ATC installed monitoring well #7 (MW-7) in February 2002 According to <br /> Summary Report dated April 10, 2002 prepared by ATC, analytical results <br /> of the two soil samples collected during the well installation were non- <br /> detect for total petroleum hydrocarbons as diesel (TPH-d) Analytical <br /> results of the water sample from MW-7 were 100 micrograms per liter <br /> (µg/l) of TPH-d Four quarters of sampling are required as discussed in <br /> the meeting in October 2001 EHD requested cross-sections for the site <br /> be submitted and a table with historical depths to groundwater be included <br /> in future quarterly monitoring reports <br /> 110 W. Sonora <br /> Petroleum hydrocarbons were detected in the analytical results of the <br /> three water samples collected from the deepest well on the site, RW-1 , <br /> according to Quarterly Monitoring Report First Quarter 2002 dated April <br /> 10, 2002, prepared by AGE Water samples were collected from first <br /> water level and the bottom of the well using a disposable bailer and a <br /> bomb sampler Contamination in groundwater may not be vertically <br /> defined EHD recommended installing additional discretely screened <br /> deep monitoring wells Submit a work plan that will define the vertical <br /> extent of the groundwater contamination to EHD by June 10, 2002 <br /> • Operation of the soil vapor extraction system should continue <br />