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GROUND ZERO ANALYSIS, INC. t' i .� ' P[q 1 <br /> 1714 Main,Stivet <br /> Escalon,California 95320-1927 <br /> Telephone. (209)838-9888 <br /> Facsiinilc: (209)838-9883 <br /> 'll! <br /> March 14, 2000 <br /> 'I <br /> ;1 <br /> Mr. Harlin Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> _. -- -T-Subject:: nl.. �.{rrteritSoil and Groundwater Corrective Action <br /> �'�of"l. ►'1'�1� ?i eir' rr•rtr- l _ � <br /> Former Sr_innyside Produce <br /> 8960 W. Walnut Grove Road, Thornton, CA <br />' Dear Mr, Knoll: <br /> Ground Zero Analysis, Inc. (Ground Zero), on behalf of Mr. Mike Manser, submits this addendum <br /> to the approved workplan for interum remediation of contaminated soil and groundwater at the <br /> subject site. <br /> ,k <br /> As we discussed dcu"ing your site visit on March 13, 2000, the vertical limit of contaminated soil at <br /> the site has been confirmed during excavation to be approximately 13 feet below ground surface <br /> (bgs). Excavation activities appear to have successfully removed significantly impacted soil from <br /> the around surface to a depth of 13 feet within our original estimated area of soil contaminations <br /> However, as we discussed, soil contamination appears to extend some distance outside of our <br /> original estimated limits on the eastern and southwest rn boundaries of our current excavation. By <br />��-= .__,�.--��;� di�� n�;;a,_series%o:F' exl,1.orator:y�trenc.lies;��re.-l�a��e= detern�ir�ed wthata the.�cnntaminatienw.i:r.�thes.'e� .:=Y-�- - - <br /> directions appear to be somewhat limited. Ground Zero estimates that the removal of <br /> approximately 1,200 additional cubic yards of soil in these areas will effectively remove the <br /> majority of contaminated soil at the site (see fig re attached). Ground Zero estimates that <br /> approximately 900 cubic yards of this total will be treated as contaminated soil. The soil will be <br /> segregated, stockpiled, and aerated as previously dis used in the February 15, 2000 Interim Soil <br /> and Groundwater Remediation Workplan. " <br /> In addition, we anticipate that it %vill be necessary to remove approximately 20,000 gallons of <br /> groundwater firorn the excavation in addition to the 40,000 gallons that was purnped previously:; <br /> I The pumping of the additional 20,000 gallons of SIFOLIridwater will serve the joint purpose of <br /> 11GZA CSISYSIi)nSa1GF0ZINL7ZL1fe4r�i15F,IYihdatser2tinlerinn�r_ndcLdoc <br />