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- I <br /> ICF KAISUi <br /> ENVIRONMENT&ENERGY GROUP ENTAL <br /> HEAD T11 <br /> ICF Kaiser Engineers,Inc. +� <br /> 11290 Point East Drive, Suite 200 <br /> Rancho Cordova, CA§5742' JUL 29 4 llr <br /> 916/852-3700 Fax 916/852-3777 <br /> i <br /> July 25, 1996 <br /> Ms. Mary F. Meays <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 445 North San Joaquin, P.O. Box 0388 <br /> Stockton, California 95201-0388 <br /> Subject: Request for Approval of Additional Soil Analyses for the Upcoming Field <br /> Investigation at the 425 Union Street Site, Stockton. Site Code: 241434 <br /> Dear Ms. Meays: <br /> In your-letter of July 2, 1996, you.gave conditional approval of our Revised Soil Gas <br /> Investigation Workplan for the subject site, requesting that physical property and TCLP <br /> analyses be performed on contaminated soil samples that.may be collected. Such data would <br /> be'useful for fate and transport analysis that could be used in support of a� site closure request. <br /> If contaminated soil is encountered, -it is estimated that the additional analyses will add <br /> approximately $1,650 to the project's estimated costs. This includes a maximum of nine soil <br /> i samples for total organic carbon,analyses, a.maxim urn of 6 samples for the API RP-40 <br /> package (which includes air permeability., total porosity, fluid saturation, grain density, and <br /> bulk density), and. a maximum of 2-samples for zero-headspace TCLP analysis for BTEX and <br /> TPHg. The field work is scheduled for completion August 1-2, 1996. <br /> I�r <br /> Please send us written approval for these additional analyses (FAX transmittal would be <br /> f appreciated; FAX: 916-852-3777). Please feel free to call with any questions you may have, <br /> and thank you for your cooperation in this matter. <br /> Sincerely, <br /> )- John M. Farr, Ph.D., P.E. <br /> Chief Engineer <br /> cc: Jeff Lawson, Reed, Elliott, Creech & Roth <br /> Elizabeth Thayer, CVRWQCB <br />