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' Los Angeles•Washington D.C. <br /> • San Diego <br /> BUILDING 528 STATE_STREET <br /> ANALYTICS GLENDALE,CALIFORNIA 91203 <br /> Build!ng/Fnvironmental Evaluations (818)500-1898 <br /> (818)246-8195 FAX <br /> 1 <br /> April 4, 1997 <br />' File No.: 197046a <br />' Mr. Arthur S. Barbour <br /> Vice President <br /> Real Estate Negotiations <br /> Wells Fargo Bank <br />' 111 Sutter Street <br /> San Francisco, California 94163 <br /> tReference: 49 South Wilson Way, Stockton, California <br /> Subject: Additional Phase II Subsurface Investigation <br /> Dear Mr. Barbour: <br /> Building Analytics has completed an additional Phase II Subsurface Investigation at the <br /> above-mentioned site. <br />' Building Analytics installed and sampled three groundwater monitoring wells at the site <br /> according to the work plan dated December5, 1996 and approved by Ms. Linda Turkatte <br /> of the San Joaquin County Public Health Services. Based on the results, the following <br /> summary of findings is presented: <br /> • Theroundwater flow direction <br /> g is to the northeast with a hydraulic gradient of 0.0025; <br /> • TPH-g at levels up to 1,300 ppm and benzene (up to 0.39 ppm) were detected in the <br /> soil samples collected from boring B2 at depths between 35 and 55 feet bgs; <br /> • TPH-g and BTEX were not detected in groundwater samples collected from MW-1 or <br /> MW-3; <br /> • Benzene was not detected in the groundwater sample collected from MW-2; <br /> • TPH-g (1.6 ppm), ethylbenzene (120 ppm) and xylenes (370 ppm) were detected in the <br /> groundwater sample collected from MW-2; <br /> • MTBE was not detected in any of the soil or groundwater samples collected; <br /> It is the opinion of Building Analytics that former on-site activities at the Wells Fargo Bank <br /> Property located at 49 South Wilson Way have not significantly impacted the subsurface of <br />