Laserfiche WebLink
AP 1104Y 000SYStOMS 4191-E Power Inn Road, Sacramento, CA 95826 (916) 452-2901 <br /> O FREMONT s COSTA MESA * SACRAMENTO a HOUSTON <br /> s <br /> 3 <br /> December 1, 1988 <br /> AGS 86091-6 <br /> f <br /> Mr. Steve Epperson <br /> Beacon Oil Company <br /> 525 West Third Street <br /> Hanford, California 93230 <br /> Subject: Letter report of quarterly ground-water monitoring at <br /> Beacon Station No. 1--502, 35 North Cherokee Lane, Lodi, <br /> California, <br /> Mr. Epperson: <br /> A geologist from our office was present at Beacon Station <br /> No. 1-502 in Lodi on 7eptember 6 through 9, 1988, to purge and <br /> sample five ground-water monitoring wells. The work was <br /> . implemented at the request of Beacon Oil Company as part of our <br /> ongoing environmental investigation. <br /> The site is located an the southwest corner of the intersection <br /> of North Cherokee Lane and Elm Street in Lodi. The location of <br /> the station is shown on the Site Vicinity Map (Plate P-1) . <br /> Applied GeoSystems previously installed one 2--inch-diameter and <br /> four h--inch-diameter ground-water monitoring wells. The <br /> locations of the wells relative to site facilities are depicted <br /> on the Generalized Site Plan (Plate P--2) . Previous work <br /> indicated that the soil in the area immediately adjacent to and <br /> below the tank cavity is contaminated with hydrocarbons (AGS <br /> Report No. 8691-3, dated November 7, 1986) . <br /> Depths to ground water were measured in the monitoring well prior <br /> to purging and sampling. Water-level data, which are summarized <br /> in Table 1, indicate that 1) at the time of measurement, the <br /> ground-water surface in the. monitoring wells had dropped an <br /> average of 3.05 feet since the previous sampling event and 2) the <br /> average ground-water flow direction was south 55 degrees west, <br /> similar to that observed in previous sampling events; the <br /> calculated average gradient (0. 62-foot vertical per 100 feet <br /> horizontal) was found to be somewhat greaten than those obtained <br /> from previous events. In contrast to previous events, the data <br /> from well MW-3 were inconsistent with Chose from the other wells <br /> and were excluded from the gradient calculation. <br /> i� <br />