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John P. Cummings & Associates <br /> Environmental Consultants <br /> Ph (510) 505.0722 P O Box 2847 <br /> Fax (510) 791-3306 Fremont, CA 94536-2847 <br /> File No. 0395016.00 <br /> January 3, 1996 <br /> Paul Wnuk <br /> SIERRA LUMBER MANUFACTURERS <br /> 375 W. Hazelton Street <br /> Stockton, CA 95201 <br /> Re; Report Quarterly Monitoring <br /> Sierra Lumber Site <br /> 375 W. Hazelton Ave. , Stockton, CA <br /> Dear Mr. Wnuk: <br /> John P. Cummings and Associates (JPCA) is pleased to forward to you <br /> this report on the quarterly monitoring carried out on December 11, <br /> 1995 at 375 W. Hazelton Ave. , Stockton CA. <br /> BACKGROUND <br /> The site has a lumber manufacturing business on it and is located <br /> in the topographically flat, commercial/residential area of central <br /> Stockton. Figure 1 is a location map. <br /> An Underground Storage Tank (UST) was removed from this site on <br /> August 1, 1988 . The 1000 gallon tank reportedly contained unleaded <br /> gasoline. Groundwater samples collected in the saturated zone, <br /> during this investigation will be analyzed for Lead (Pb) . <br /> Soil samples collected from the bottom of the excavation at the <br /> time of the UST removal were analyzed for Total Petroleum <br /> Hydrocarbon as gasoline (TPHG) ; Benzene, Toluene, Ethylbenzene and <br /> Xylene (BTEX) . The soil samples taken below the UST in native soil <br /> showed 790 and 1200 parts per million (ppm) TPHG at 9 and 15 feet. <br /> Soil was excavated to about 15 feet and aerated. The excavation <br /> was filled in with clean soil. <br /> The former UST area is located on the south westerly side of the <br /> building, under a shed like roof, located behind the warehouse <br /> facing Hazelton Avenue, with the closest cross street Lincoln Road. <br /> A Boring, identified as B-T, was placed by JPCA on June 24, 1994, <br /> 1 <br />