Laserfiche WebLink
t r FILE COPY 9 <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> � —•� ':� Unit Supervisors <br /> Donna K.Heran,R.E.H.S. <br /> 304 East Weber Avenue, Third Floor Carl Bergman,R. .H.S., S. <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> At Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> .cqc' Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Fax: (209)464-0138 Robert McClellon,R.E.H.S. <br /> Program Manger Mark Barcellos,R.E.H.S. <br /> Lorre Islas <br /> City of Stockton <br /> 425 North E1 Dorado, Room 301 <br /> Stockton, CA 95202 <br /> RE: FORMER CHASE CHEVROLET FACILITY APR 14 2004 <br /> 424 VAN BUREN <br /> STOCKTON,CA 95203 <br /> WORKPLAN: Soil and Groundwater Investigation Work Plan <br /> DATED: April 7. 2004 PREPARED BY: Treadwell &Rollo <br /> APPROVED with Conditions (See Below) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN (H&S <br /> 25299.37,subd.(c)(3).): <br /> 1. Removal of approximately 684 cubic yards of contaminated soil in a 30 foot-long by <br /> 28 foot-wide by 22 foot-deep excavation at the site near the location of the former <br /> monitoring well MW-3. The excavation will be facilitated with shoring. <br /> 2. De-watering of 12,000 gallons to 30,000 gallons of contaminated groundwater <br /> expected to come into the excavation. <br /> 3. Characterization of excavated stockpiles by sampling and analyses. <br /> 4. Characterization of the de-watered contaminated groundwater by sampling and <br /> analyses. <br /> 5. Disposal of contaminated soil to off-site facilities. <br /> 6. Potential (on-site) reuse of overburden soil if analytical results of the samples <br /> indicate the soil to be clean. <br /> COMMENTS AND CONDITIONS: <br /> 1. Contaminated and clean stockpiles should be segregated. The soil is determined <br /> clean only if both geologist/project manager and EHD staff on site concurred based <br /> on field observation and field data from organic vapor meter such as an photo <br /> ionization detector (PID). <br /> 2. One soil sample should be collected per 100 yards of clean excavated soil. . <br /> 3. Contaminated soil scheduled to be disposed off site should be characterized <br /> according to the requirements of the accepting facility. <br /> 4. Groundwater de-watered from the excavation should be stored in a baker tank and <br /> characterized before disposal. <br />