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r R0M Ground Zero An 1 ys i 6 PHONE NO. 209 838 9883 Mar. 14 2000 12:02FM:�P2 <br /> bks *Awiui "Q JN T� <br /> ENVIRONMENTAL HEALTH DIVISION <br /> 304 E. Weber Ave.Third Floor <br /> GROUND ZERO ANALYSIS, INC. P.O. Box 388,Stockton,GA-95201-0388 <br /> Phone: 209 4666-WO <br /> 1714 Main,Stmet <br /> ltascalon,ca fornis 933VI-1927 <br /> Twephatse.-(204))838-k�ttil3ApprovedI <br /> Fasimite;(209)838-9883 Approved with urges: .See Reftrlts <br /> Disapproved: See Remarks ' <br /> Remark s 01-h -5wQcz <br /> March 14,2000 ( <br /> .i <br /> Mr. Harlan Knoll Dale <br /> San Joaquin County Public Health Services Approval of-these plans extends only to that <br /> Environmental Health Division which is shown and described hereon 'but <br /> iO4 East Weber Avenue, Third Floor des not authorize or approve any omission <br /> Stockton, CA 95202 or deviation of requirements of State laws or <br /> Local Ordinances. <br /> Subject: Workplan Addendum #Z <br /> Interim Soil and Groandwater Corrective Action <br /> Former SunnysidePro&Ce <br /> 8960 W. Walnut Oiwy Road,Thorttto , CA <br /> Dear Mr. Knoll: <br /> Ground Zero Ana(ysis, I nc. (Ground Zero), on behalf of Mr. Mike Manser, submits this addendum <br /> t0 the approved workplan for interim reniediation of contaminated soil and groundwater at the <br /> subject site, <br /> A5 we discusscd during your site, visit on March 13, 2000,the vertical limit of contaminated soil at <br /> the site has been uanfirmed during excavation to be approximately 13 feet. below Smund surface <br /> (kgs). Excavation activities appear to have successfully removed significantly impacted soil from <br /> the ground surface to a depth of 13 feet within our original estimated arc. of soil contamination, <br /> Aowever, as we discussed, soil contamination app rs to extend some distance outside of our <br /> original estimated limits on the eastern and southwestern boundaries of our c n-ent excavation. By <br /> 4iggitig a series of exploratory trenches, we have letermined that the contamiination in these <br /> dimctions appear to be somewhat litnited. Groand Zero estimates that the (removal of <br /> approximately 1,200 additional cubic yards of soil in these areas will effectively mmove the <br /> majority of contaminated soil at the site (see figure attached). Ground Zero estimates that � <br /> alpproximately 900 cubic yards cif this total will be x ated trs contaminated soil. The soil will be <br /> iegregated, stockpiled, and aerated as previously discussed in the February 15, 2000 Interim Soil <br /> and Groundwater Rernediation Workplan_ <br /> In. addition, we anticipate that it will be ne4less2rry to resrrove approximately 20,000 gallons of <br /> groundwater from the exaivattion in addition to the 40,000 gallons that was pumped previously. <br /> The pumping of the additional 20,0043 gallons of groundwater will serve the joint purpose of <br /> �tiG2.a�FSVSY3U]a7s�kCrR[7LG�IEIZGIM,AN9iR1h9:inci 31�Ncrirnar rt��.+trie <br /> 1 <br />