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-AIL HORIz6N ENVIRONMEP tAL INC. <br /> Specialists in Site Assessment,Remedial Testing,Design and Operation <br /> February 10, 1999 <br /> Mr. Jeffrey Wong <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, 3`a. Floor <br /> Stockton, California 95202 <br /> Subject: Letter Work Plan for Well Abandonment <br /> Former Discovery Chevrolet Site ID Code: 2595 <br /> 1615 11". Street, Tracy, California. <br /> Mr. Wong: <br /> At the request of our client , Ms. Michelle Nokes, Horizon Environmental Inc. (I3orizon) <br /> has prepared this Letter Work Plan to abandon wells at the above-referenced site (see <br /> attached Figure 1). The purpose of this work is to properly abandon all remaining <br /> groundwater monitoring wells as part of completing regulatory case closure for this site, as <br /> directed by the California Regional Water Quality Control Board-Central Valley Region <br /> (CRWQCB-CVR)letter dated January 27, 1999 (copy attached). <br /> The scope of work to be performed includes: Obtaining the necessary well abandonment <br /> permits from the San Joaquin County Public Health Services/Environmental Health Division <br /> (SJC PHS/EHD); preparing a site-specific safety plan; scheduling field work; abandoning <br /> four groundwater monitoring wells; and preparing a report which presents field procedures, <br /> results, and conclusions for the work performed at the site. <br /> The scope of work described in this work plan is intended to comply with the State of <br /> California Water Resources Control Board's Leaking Underground Fuel Tanks (LUFT) <br /> Manual, the CAL/EPA Guidance Manuals for Groundwater Investigations, and Bulletin 74- <br /> 90 of the California Well Standards. Horizon Environmental Inc. Field Methods and <br /> Procedures are included as an attachment to this work plan. <br /> SCOPE OF WORK <br /> To properly abandon all wells as part of obtaining regulatory case closure for this site, <br /> Horizon proposes to perform the following work: <br /> Task 1 Obtain well abandonment permits from the SJC PHS/EHD, prepare a site <br /> safety plan, notify Underground Service Alert, and schedule a licensed <br /> drilling subcontractor. <br /> 5011 Golden Foothill Parkway,Suite 7 • EI Dorado Hills,CA 95762 . (916)939-2170 • FAX(916)939-2172 <br /> PO.Box 5283 • Bakersfield,CA 93388 • (805)589-8389 • FAX(805)589-1456 <br />