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7 <br /> GEORGE DEUKME)tAN, Govrrnor <br /> STATE OF CALIFORNIA—HEALTH AND WELFARE AGENCY <br /> DEPARTMENT OF HEALTH SERVICES <br /> TOXIC SUBSTANCES CONTROL DIVISION <br /> NORTHERN CALIFORNIA SECTION <br /> 4250 POWER INN ROAD <br /> SACRAMENTO,CA 95826 <br /> (916)739-3145 <br /> September 27, 1988 <br /> Mr. Jackson C. Chih <br /> v Maid U <br /> Renown Enterprises, Inc. <br /> 150 East Mesa Linda Drive SEP 29 1988 <br /> Danville, CA 94526 <br /> ENViR0IvP1ID"JTAL HEALTH <br /> Dear Mr. Chih: PERMIT 1 SERVICES <br /> COMMENTS ON WORK PLAN Foli TI1E RENOWN ENTERPRISES SITE SUBMITTED <br /> BY DAMES AND MOORE <br /> On August 4 , 1988 the following report was submitted to the <br /> Department of Health Services (DHS) for our review and approval : <br /> "Work Plan Soil and Ground Water Contamination Assessment Renown <br /> Enterprises Property Trac , Cali ornia" . The purpose of the Work <br /> Plan is to describee activities to be conducted to assess the <br /> soil and ground water contamination at the Renown Enterprises <br /> property located at the corner of Tracy Boulevard and Beechnut <br /> Avenue in Tracy California. The comments listed below were <br /> communicated verbally to Mr. Dan Mathews of Dames and Moore on <br /> August 11, 1988 . <br /> Comments are as follows: <br /> Page 3 , What method will be used to select samples to be <br /> analyzed for semivolatile and volatile organic compounds? <br /> Please provide a site map showing actual locations at which soil <br /> samples were taken. <br /> The method to be used to analyze soil samples for polynuclear <br /> aromatic hydrocarbons (PAH) was not identified. DHS believes <br /> that the method that achieves the lowest detection levels <br /> possible for PAH' s should be used. <br /> Page 5 , Why are rising head (slug?) tests proposed instead of <br /> pumping tests to measure the hydraulic conductivity of the <br /> shallow ground water? DHS believes that pump tests results would <br /> give a more precise value of the hydraulic conductivity than <br /> rising head tests . <br /> How many rounds of ground water sampling are you anticipating? <br /> DHS believes that, at a minimum, three consecutive months of <br /> sampling should be conducted. <br />