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U <br /> 2005 SEP 12 AM 9= 14 - <br /> September 7, 2005 SAN J C A Q U I N C G 0 N T Y <br /> ENV.iRCtJFf.E&ITAL <br /> HEALIK D PAW,TMENT <br /> i <br /> Mr. Harlin Knoll 02093 <br /> San Joaquin County Environmental Health Department 06.a4 <br /> 304 E. Weber Street, Third Floor <br /> Stockton, California 95202 <br /> Re: Well Abandonment Workplan <br /> ARCO Service Station No.2093 <br /> 3425 Tracy Boulevard,Tracy,California <br /> Dear Mr. Knoll: <br /> On behalf of Atlantic Richfield Company (ARCO), URS Corporation Americas (URS) has prepared <br /> this workplan for the abandonment of 12 groundwater monitoring wells (ATR-1 through ATR-12) at <br /> ARCO Service Station No. 2093 (site) located at 3425 Tracy Boulevard, Tracy, California (Figures 1 <br /> and 2). This workplan has been prepared based on the June 23, 2005, letter from the California <br /> Regional Water Quality Control Board, Central Valley Region (CRWQCB-CVR) to the San Joaquin <br /> County Environmental Health Department (SJCEHD) regarding concurrence on a no-further-action- <br /> required decision for the site (Attachment A). 1 <br /> i <br /> SITE BACKGROUND <br /> Currently, the site is operated as an ARCO service station with an AM/PM mini-mart. The site is <br /> bounded by commercial property to the west and north, Tracy Boulevard to the east, and West Clover <br /> Road to the south. The majority of the site is paved. <br /> Site structures include double-walled fiberglass gasoline underground storage tanks (USTs), two pump <br /> islands, and the AM/PM mini-mart. During previous site work, 12 groundwater monitoring wells <br /> (ATR-1 through ATR-12), 7 soil vapor extraction wells (VES-1 through VES-7), 3 air sparging (AS) <br /> wells (S-1 through S-3), and 1 groundwater monitoring/AS well (SMW-1) were installed (Figure 2). <br /> Groundwater extraction well, TEX-1, was properly abandoned in January 2004. <br /> SCOPE OF WORK <br /> This workplan includes discussion of permitting, well abandonment methods, and report preparation. A <br /> health and safety plan has been prepared and will'be available on site during field activities. <br /> URS Corporation <br /> Crown Corporate Center <br /> 2870 Gateway Oaks Drive,Suite 300 <br /> Sacramento,CA 95833 _ <br /> Tel: 916.679.2000 <br /> Fax:916.679.2900 KAWproccssV5 BP ARC01020931Well Destr12093 Well Destruction WP O5.doc <br />