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i 1 C <br /> V 6602 Owens Drive, Suite 100 <br /> Pleasanton, California 94588 <br /> www.atc-enviro.com <br /> 925.460.5300 <br /> Fax 925.463.2559 <br /> ASSOCIATES.,AT <br /> I NC . <br /> November 6, 2000 neccuv.. <br /> NoyD <br /> Public Health Services San Joaquin County ENV , 3 2000 <br /> Environmental Health Division p 1R0NMENT <br /> 304 E. Weber Avenue, Third Floor ER II jl RV SFS Ty <br /> Stockton, California 95202 <br /> Attn: Harlan Knoll <br /> RE: WORKPLAN — GROUNDWATER MONITORING WELL INSTALLATION AND <br /> QUARTERLY MONITORING <br /> AT&T, Microwave Relay Facility <br /> 90 West Turner Road, Lodi, CA <br /> ATC Project No. 75.75 I28.0001 <br /> Dear Mr. Knoll: <br /> ATC Associates, Inc. (ATC) has prepared this Workplan to perform an environmental groundwater <br /> monitoring well installation and quarterly monitoring investigation at the AT&T Microwave Relay <br /> Facility located at 90 West Turner Road, Lodi, California. ATC is under contract to AT&T to <br /> provide environmental engineering services for investigating underground storage tank (UST) <br /> sites. This Workplan has been prepared in response to a request from the department of Public <br /> Health Services, San Joaquin County, Environmental Health Division (SJCEHD) to investigate <br /> the release of petroleum products from the USTs operated at this site. The scope of work is based <br /> on the findings of an underground storage tank (UST) removal investigation by ATC on March 4, <br /> 1999 and a soil boring investigation by ATC on April 6, 2000. <br /> This Workplan gives a brief description of the site history, site usage and known environmental <br /> impacts. In addition, the Workplan describes the key project and data quality objectives, and <br /> specific field and analytical procedures to be utilized during the investigation. <br /> SITE USAGE AND 13ACKGROUND <br /> The site is owned by AT&T and is a decommissioned microwave telecommunications relay facility. <br /> One building exists near the center of the site with a microwave tower located to the north of the <br /> building. The site is accessed by a gravel road along the east side of the building. One 15,000-gallon <br /> diesel fuel UST was located adjacent to the northeast corner of the building. The age of the UST was <br /> unknown. <br /> ATC Associates Inc. 1 75.75128.0001 <br />