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1.0 EXECUTIVE SUMMARY In April 1995, CRC Environmental Risk Management, Inc., (CRC) conducted a Phase II Environmental Assessment and Subsurface Investigation at the request of American Savings Bank (ASB) of Irvine, California. The environmental assessment was performed at 150 West 10th Street, in the City of Tracy, County of San Joaquin, California. The purpose of the investigation was to determine whether potential subsurface contamination exists due to the former use of the subject property and an adjacent property as dry cleaning facilities from the mid 1940s to early 1970s. Five (5) soil borings were advanced by Geoprobe coring to a depth of 15 feet below ground surface (bgs). A total of fourteen (14) soil samples were collected and thirteen (13) samples were analyzed for volatile organic compounds (VOCs) by EPA Method 8010. Five (5) groundwater samples were also collected and analyzed for VOCs by EPA Method 8010. No VOCs were detected above the method detection limits in any of the soil samples analyzed. Of the EPA 8010 analytes, only chloroform was detected in five (5) groundwater samples at concentrations which ranged from 0.89 micrograms per liter (µg/1) to 3.3 µg/1. This range of concentrations was below the Maximum Contaminant Level (MCL) of 100 µg/l for chloroform based on the California Department of Health Services. The potential presence of underground storage tanks (USTs) on the subject property was also investigated by a geophysical survey. The results of this investigation did not indicate any anomaly which may be attributed to the presence of USTs on the site. Based on the above findings (e.g., no detection of contaminants in soil samples), CRC concludes that it is unlikely the subject property has been adversely impacted by its former use as dry cleaning facilities. Additionally, no evidence was identified of the potential presence of USTs on the site. The presence of chloroform in the groundwater beneath the site may by due to an off-site source. Therefore, CRC recommends no further action or investigation in connection with the property at this time. CRC further recommends that a copy of this report be furnished to the San Joaquin County Public Health Services, Environmental Health Division(SJCPHS-EHD),pursuant to their request as a condition to obtaining a drilling permit. 2.0 INTRODUCTION This report presents the results of the field investigation conducted by CRC at the ASB Tracy Branch located at 150 West 10th Street, City of Tracy, County of San Joaquin, California (Topography and Site Location Map, Appendix I) on April 24, 1995. The Phase II Environmental Assessment and Subsurface Soil Investigation was undertaken to determine potential subsurface contamination due to the former use of the site and an adjacent property as dry cleaning facilities from mid 1940's to early 1970's. CRC Environmental Risk Management, Inc. Project N 2100-217-2 American Savings Bank 150 West 10th Street May 1995 1 Tracy, California