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D <br /> A S S Q C I A T E S I N C <br /> A municipal well identified as California Water Service Company Well # 49-01 is located <br /> approximately 1,400 feet south-southeast of the project site, across Brookside Road (Figure 3, <br /> Well No. 2). According to the well log, the well is completed at approximately 504 feet bgs. <br /> The screen interval in this well is located from 170 to 480 feet bgs. Because this well is located <br /> in the inferred crossgradient direction from the site, it is ATC's judgment that it is unlikely that <br /> the well has been impacted or is threatened by petroleum hydrocarbons from the site. <br /> Approximately 3,000 southwest of the former UST location, a well of unknown use was <br /> identified in the well log search in the vicinity of La Jolla Drive and.Marine Avenue intersection <br /> (Figure 3, Well No. 3). This well was installed in 1945 and the log indicates the well was <br /> completed at a depth of 55 feet bgs. Field reconnaissance performed by ATC reveled this is the <br /> location of a residential neighborhood, however no evidence of a well was observed. Because <br /> this well is located in the inferred upgradient direction from the site, it is ATC's judgment that it <br /> is unlikely that the well has been impacted or is threatened by petroleum hydrocarbons from the <br /> site. <br /> ATC personnel conducted an on-site search for potential receptors on November 3, 2000. The <br /> • Calivaras River was observed approximately 1,500 feet south of the project site. Because this <br /> stream is located in the inferred cross gradient direction from the site, it is ATC's judgment that <br /> it is unlikely that the stream has been impacted or is threatened by petroleum hydrocarbons from <br /> the project site. No open ponds or other streams were located within 2,000 feet of the site. <br /> OTHER ACTIVITIES <br /> During a June 6, 2000 telephone conversation between Mr. Tom Lutterman of ATC and Mr. Jeff <br /> Wong of PHS/EHD, ATC's Workplan for Supplemental Investigation dated September 12, 2000 <br /> was discussed. PHS/EHD and ATC both agreed that installing additional monitoring wells was <br /> warranted at the site in lieu of the soil borings proposed in the workplan. Unlike the proposed <br /> soil borings, the monitoring wells will provide repeatable groundwater sampling points. ATC <br /> agreed to submit an addendum to the September 2000 workplan. The workplan addendum will <br /> be submitted by December 8, 2000. <br /> w:117292.00021reportsl3 qmr 2000.doc 3 <br />