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ANDERSON " <br /> CONSULTING <br /> GROUP <br /> File No 2070-2 <br /> Geotechnical and 6 July 1992 <br /> x <br /> Environmental <br /> Engineering <br /> solid Waste <br /> Management <br /> Waste Reduction San Joaquin County Public Health Services <br /> and Recycling Environmental Health Division <br /> P O Box 2009 <br /> Stockton, CA 95201 <br /> Attention Margaret Lagorto RL60 V - ' <br /> J U L 0 8 1992 <br /> Subject Rainbo Bakery ENVIRONMENTAL HEALTH <br /> 2651 S Airport Way PERMIT/SERVICES <br /> San Joaquin County Site Code 19093 <br /> Stockton, San Joaquin County, California <br /> SUPPLEMENTAL INFORMATION TO THE <br /> PROBLEM ASSESSMENT REPORT <br /> Dear Ms Lagorio <br /> This lettei is in response to the San Joaquin County Environmental Health Division <br /> request for supplemental Information to our 19 December 1991 Problem AssetAmern <br /> Repoli The county's letter, dated 27 February 1992, requested the following - <br /> • copies of laboratory analyses and chain of custody documentation for <br /> soil samples obtamcd following over-excavation of the former tank <br /> locations, <br /> • an estimate of the quantity of soil contamination remaining in the <br /> former tank location <br /> Anderson Consulting Group (ACG) was able to locate copies of the laboratory analyses <br /> and chain of custody documc,ntation for the soil samples obtained following ovei- <br /> 631 Commerce Drive excavation of the lormei tank locations However, ACG was not involved witll this <br /> Roseville,CA 95678-6431 phase of work and, consequently, the missing data was somewhat difficult to obtain As <br /> 916 969 8883 far as we can ascertain, all of the missing data has been located and included in this <br /> letter <br /> 916 786 8883 <br /> Fax 916 786 7891 An estimate of the quantity of soil contamination remaining in the former tank location <br /> cannot be provided Since ACG was not involved it this phase of work, it would be <br /> difficult for us to provide, such an estimate However, based on our research of <br /> 350 Crown Point Circle excavation operations performed at the site, it appears that the majority of the petroleum <br /> Suite 250,Grass Valley,CA hydrocarbon contaminated soil was reImoved and remediated tollowing removal of the <br /> 9-5945-7801 tanks In 1987 Additionally, according to results of Environmental Science and <br /> i� 916 273 7645 Engineering, lne 's December 1987 investigation, petroleum hydrocarbons were detected <br /> Fax 916 273 9159 in only three samples and at a maximum concentration of 130 parts per million <br /> an employee owned company <br /> CJ recycled paper <br />