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GROUND ZERO <br /> ANALYSIS, INC . <br /> 1172 Kansas Avenue, Suite A <br /> Modesto, CA 95351 <br /> 209.522.4119 - PH <br /> 209.522.4227 - FAX <br /> groundzeroanalysis.com <br /> i <br /> August 27, 2019 <br /> Mr. Patrick Riddle, Esq . <br /> Law Offices of Patrick D . Riddle, P .C . <br /> 22180 May Road <br /> Acampo, CA 95220 <br /> Subject : Results of Soil Sampling for Underground Storage Tank Closure <br /> Associated Tractor Service, Inc . <br /> 1323 W . Charter Way, Stockton, CA <br /> Dear Mr. Riddle : <br /> We have prepared this report on behalf of Ms . Margo Bentz4vers , the property owner of the <br /> subject site, which is occupied by Associated Tractor Service, Inc . This report describes the <br /> results of soil sampling to investigate conditions beneath a former underground gasoline <br /> storage tank (UST) . <br /> Background <br /> According to records in San Joaquin Environmental Health Dept. (EHD) files a 1 , 000 - <br /> gallon gasoline UST was last used in 1986 or 1987 and was removed without a permit in <br /> the spring of 1991 . The UST reportedly had a small hole in the bottom . The tankpit was <br /> then backfilled without any soil samples being collected . <br /> In October 1991 the Roy F . Weston company filed an UST closure permit application for <br /> soil sampling but apparently the work was not performed . In June 1992, as requested by <br /> EHD , Hess & Hess construction filed a soil sampling workplan and another UST closure <br /> application. The workplan proposed collecting two soil samples from the tankpit with a <br /> hand auger. There is nothing in the EHD files to indicate that the proposed sampling work <br /> was done . Note, however, that the additional required UST closure information such as <br /> tank disposition record, etc . were filed with EHD . <br /> UST Soil Sampling Report <br />