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Advanced <br /> GeoEnvironmental Inc. <br /> ENVIRONMENTAL HEALTH DIVISION <br /> 304 E. Weber Ave.Third f=loor <br /> 05 April 1999 P. O. Box 388, Stock n CA 95201-0388 <br /> AGE-NC Project No. 98-0432 Approved APR <br /> 110 6 1999 <br /> Conditions ze�,- &9 crha-ev sL_r{a-- <br /> Ms. Carol Oz �Pd"��`"F 8a7p �ob v - . <br /> Date Co'3, q� t)y_ ��„apc E7Ev;kT <br /> San Joaquin County PHS-EHD - <br /> 304 E. Weber Avenue, Third floor �"y'o`er "`` `� IO -11`7- <br /> WIG <br /> Stockton, California 95202U "!r k �II �� v'-p <br /> / <br /> Subject: Preliminary Site Assessment Work Plan Addendum / <br /> MARTINI AUTOMOTIVE <br /> 4032 North El Dorado Street, Stockton, California <br /> Dear Ms. Oz: <br /> At your request,Advanced GeoEnvironmental, Inc. (AGE) presents the following additions to the <br /> Preliminary Work Plan for the site at 4032 North El Dorado Street, Stockton, California(the site), <br /> dated 12 March 1999. <br /> • Due to the detection of Poly chlorinated by-phenols (PCBs) in the former waste oil <br /> underground storage tanks (UST) location on the site, selection soil samples will be analyzed <br /> for PCBs. <br /> • The historical lowest depth to the ground water table or the top of the unconfined water table <br /> during the operation of the USTs on the site was approximately 75 feet below surface grade <br /> (bsg). If hydrocarbons were release to this depth, the PHS-EHD has requested a vertical <br /> assessment of the former water table Ievel (75 feet bsg). Current ground water table depth <br /> is approximately 35 feet bsg. One soil boring from each UST area will advanced to 70 feet <br /> bsg. If soil contamination is observed at a depth of 70 feet bsg in either or any boring, the <br /> soil borings will be advanced until two consecutive soil samples have no hydrocarbon odor <br /> or indication of petroleum impact. <br /> • Additional soil borings will be advanced if the lateral impact to soil is not defined by the <br /> proposed number of soil borings, on concurrence with the PHS-EHD. <br /> • Also enclosed is an application for a drilling permit and permit fee. <br /> Prior to any fieldwork AGE will we will schedule field operations and inspection 48-hours in <br /> advance with your office. <br /> 4005 North Wilson Way, Stockton, California 95205 <br /> Telephone (209) 467-1006 FAX (209)467-1118 <br />