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ILIb-g-6 k'j KLEINFELDER ATTACHMENT A Ground Water Assessment Harvest Glen Site Tracy, California OBJECTIVE Documented chloroform contamination in the ground water exists at Georgia-Pacific (approximately 1,800 feet east of the Harvest Glen site) and at Triple E Produce Company (approximately one mile southeast of the Harvest Glen site). The Jonathan Group wishes to assess baseline levels of chloroform in ground water at three locations around the Harvest Glen site prior to development. SCOPE OF WORK Kleinfelder will develop the work plan required by San Joaquin County prior to beginning field activities. After the work plan is approved, Kleinfelder will install, develop, and sample three monitoring wells at the Harvest Glen site. Specific locations of the monitoring wells will be selected by the Jonathan Group to reduce the impact of well locations on development activities. Based on regional data collected in Spring, 1987 by the San Joaquin County Flood Control and Water Conservation District, ground water at the site is anticipated to be approximately 50 feet below ground surface and flowing generally north. Kleinfelder recommends installing one well upgradient of the Harvest Glen property, one well downgradient, and one well between the Harvest Glen and Georgia-Pacific sites. Three 4-inch PVC wells will be installed to a maximum depth of 70 feet. The wells will be installed, developed, and sampled using strict environmental protocol to reduce the possibility of cross-contamination and to maintain the integrity of the wells and the samples collected from the wells. Details of the well construction, development, and sampling will be included in the work plan submitted to the San Joaquin County environmental Health District. The elevations of the well casings will be surveyed and depth-to-water measurements will be made to assess ground water elevation gradients at the site.