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CRC performed the field activities in accordance with the Modified Work Plan for Phase <br /> II Subsurface Investigation (Appendix II) with some modifications to meet actual field <br /> conditions. The depth of the boreholes was extended from the target depth of 10 feet to <br /> 15 feet because groundwater was found to be 2 to 3 feet deeper than originally reported. <br /> Neat cement was used as backfill material instead of bentonite chips as required by <br /> SJCPHS-EHD. <br /> This report briefly reviews the site history, field methodology and presents the analytical <br /> laboratory results. Health and safety guidelines were observed while conducting all field <br /> activities in accordance with the site-specific Health and Safety Plan (Appendix III). <br /> 2.1 Purpose <br /> The purpose of the investigation was to determine whether the subsoils at the <br /> subject property has been impacted by VOCs resulting from the former use of the <br /> subject property and an adjacent property as dry cleaning facilities from 1947 to <br /> 1973 and from 1945 to 1970, respectively. The potential presence of USTs on the <br /> subject property was also investigated. <br /> 2.2 Methodology <br /> Five (5) boreholes were advanced to a depth of 15 feet bgs using a hydraulically- <br /> powered percussion machine and Geoprobe sampling tools. The boreholes were <br /> located at the existing parking lot and at the southwest driveway on the subject <br /> property. The location of the boreholes are shown in the Soil Boring Location <br /> Map (Appendix I). <br /> Soil samples from each borehole were collected at 2 feet, 5 feet and 10 feet bgs. <br /> All soil samples were screened for volatile organic compounds (VOCs) using a <br /> Photovac Microtip 1000 Photo Ionization Detector (PID). Soil samples which <br /> exhibited significant PID readings were analyzed for VOCs. <br /> A geophysical survey utilizing ground penetrating radar (GPR) and <br /> electromagnetic (EM) techniques was also performed to investigate for the <br /> potential presence of USTs on the subject property. <br /> 3.0 SITE DESCRIPTION <br /> 3.1 Location <br /> The subject property is located at 150 West 10th Street in the City of Tracy, <br /> County of San Joaquin, California. The property contains a one-story building <br /> which is constructed of wood framing and steel beams with a brick exterior. <br /> The subject property is located in a mixed retail, commercial and residential area. <br /> CRC Environmental Risk Management, Inc. Project#2100-217-2 <br /> American Savings Bank 150 West 10th Street <br /> May 1995 2 Tracy, California <br />