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• Advanced GeoEnvironmental, Inc. -0 HC �a � EfD 19 November 2002 NOV 2 1 2002 AGE-NC Project No. 99-0581 ENVIRONMENT HEALTH PERMIT/SERVICES Mr. Barry Vlught Wrencher's 1630 North Main Street#190 Walnut Creek, California 94596 Subject: Phase II Site Assessment Report WRENCHER'S 540 North Grant Street, Stockton, California Dear Mr. Vlught: At your request,Advanced GeoEnvironmental, Inc. (AGE)has prepared the enclosed Phase II Site Assessment Report for the property at 540 North Grant Street,Stockton,California(site).The work was performed as part of a due diligence effort to investigate areas of potential environmental concern at the site, identified through a Phase I investigation of the property. The Central Valley Regional Water Quality Control Board requirements for the investigation of underground storage tank(UST) sites were used as guidelines for the investigation.The location of the site and its surroundings are illustrated in Figure 1; a plan of the site including boring locations is illustrated in Figure 2. INTRODUCTION/BACKGROUND The purpose of the investigation was to test for the presence or absence of suspected contaminants in the areas of identified potential concern associated with a group of automobile service establishments that operate at the subject property.Potential concerns included the possible releases of petroleum hydrocarbons and solventsrelated to the former USTs,steam bay separator and solvent recycling areas.The scope ofwork included advancement of six probe borings to collect soil samples for laboratory analysis. The site is situated in an area of mixed commercial and light industrial use.. The site encompasses a city block,bordered by East Oak Street on the north,North Aurora Street on the east,East Fremont Street on the south and North Grant Street on the west. This city-block site, referred to as 837 Shaw Road,Stockton, California 95215 Telephone (209)467-1006 FAX(209)467-1118