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sT.;�71rTs <br /> ENVIRONMENTAL. INC. 3330 Cameron Park Drive, Ste 550 <br /> Cameron Park, California 95682 <br /> (530)676-6004-Fax:(530)676-6005 <br /> August 19, 2002 <br /> Project No. 2001-0103.01 <br /> Mr. Harlin Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, California 95202 f <br /> Re: Second Quarter 2002 Groundwater Monitoring Report for the A. Teichert aruit <br /> Sons Facility located at 103 North E Street, Stockton, California <br /> Dear Mr. Knoll: <br /> On behalf of A. Teichert and Sons, Inc. (Teichert), Stratus Environmental, Inc. (Stratus) <br /> has prepared this report presenting results of the second quarter 2002 groundwater <br /> monitoring event conducted at the Teichert facility located at 103 North E Street, <br /> Stockton, California. <br /> BACKGROUND <br /> I <br /> On February 24, 1986 two underground storage tanks (USTs) used to store gasoline <br /> (Teichert tanks C-14 north and south) failed a tank tightness test. The tanks were <br /> subsequently removed on October 20, 1986. <br /> Kleinfelder Inc. advanced 16 soil borings (B-1 through B-16) in December 1986 and <br /> January 1987, converting 3 of the borings to wells MW-1 through MW-3. LBME <br /> installed monitoring wells MW-4 and MW-5 in September 1987. <br /> Between September 15 and 18, 1987, Teichert excavated petroleum hydrocarbon <br /> impacted soil beneath the former USTs. Soil was removed to a depth of approximately <br /> 38 feet below ground surface (bgs) in an excavation 47 feet in length by 25 feet in width. <br /> Impacted soil was subsequently aerated onsite. Well MW-2 was damaged during the <br /> excavation and subsequently abandoned. <br /> One 10,000-gallon UST (Teichert tank C-12) was removed on August 11, 1988. Minor <br /> petroleum hydrocarbon impact to soil was observed around the former UST. Petroleum <br /> hydrocarbon impacted soil was excavated from the former UST pit on August 23, 1988. <br /> LBME installed monitoring wells MW-9 through MW-11 in March 1990, and EMCON <br /> installed wells MW-12 and MW-13 in August 1992. EMCON performed a vapor <br /> extraction test on well MW-13 in October 1992. Ramos/BCR installed well MW-14, and <br /> P:\Teichert\Stockton-103\Quartcrly\2002\teichei-t-2QO2.doe <br />