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STR71TCIS <br /> ENVIPONMENTAI INC 3330 Cameron Park Drive Ste 550 <br /> MAY 4 2006 Cameron Park California 95682 <br /> r,1�p` <br /> '11�ll (530)676-6004-Fax (530)676-6005 <br /> ENVl v1 IV',t_I <br /> PERMIT/SERVICES April 28, 2006 <br /> Project No U6100-14-4 <br /> Mr Nuel Henderson, P G <br /> San Joaquin County <br /> Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Quarterly Groundwater Monitoring Report, First Quarter 2006, for Former ARCO <br /> Station No 6100, Located at 25775 Patterson Pass Road, Tracy, CA (LOP No 1708) <br /> Dear Mr Henderson <br /> Stratus Environmental, Inc (Stratus), on behalf of Atlantic Richfield Company (ARCO — a BP <br /> affiliated Company), is submitting the attached report which presents the results of the first <br /> quarter 2006 groundwater monitoring and sampling program at former ARCO Station No 6100, <br /> located at 25775 Patterson Pass Road, Tracy, California (Figure 1) In addition, this report also <br /> presents the status of the Solleco 500 cubic feet per minute (cfm) soil vapor extraction and <br /> abatement (SVE) system The quarterly monitoring program is in compliance with San Joaquin <br /> County Environmental Health Department (SJCEHD) requirements regarding underground <br /> storage tank (UST) investigations <br /> If you have any questions regarding this report, please contact Jay Johnson at (530) 676-6000 <br /> Sincerely, <br /> 5TKAT ENV ONM TAL, INC <br /> �r <br /> G wri S owtha, P E ay Jo son, P G <br /> Senior Engineer P J ect anager <br /> Attachment Quarterly Groundwater Monitoring Report, First Quarter 2006 <br /> cc Mr Don Pratt, ARCO/BP <br /> Mr Jim Barton, California Regional Water Quality Control Board <br /> Mr Craig Mitchell, San Joaquin Valley Air Pollution Control District <br /> The Robert and Cleo Vietra Family Trust <br /> Mr Vern Elarth, URS Corporation Americas <br /> Mr Rusty Benkosky, SECOR Internation, Inc <br /> K IBp-Arco for URS16 E 001Quarter1y120061Arco_6100_1 Q06 doc ST1�17U5 <br />