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08 September 2000 <br />AGE -NC Project No. 97-0372 <br />Page 10 of 18 <br />tested for in on-site samples. As noted above, the measured depth of static water level in the <br />inactive municipal well on the adjacent property was 30 feet Also as noted in Section 2.2 <br />above, the drilling log for the California Water Service well on the adjacent site shows <br />yellow clay from near surface to 26 feet below surface grade (bsg); from 26 feet to 30 feet <br />bsg the log shows `boulders'. The `boulders', if encountered, may make obtaining the <br />proposed total depth and a grab ground water samples difficult. A shallow zone of <br />`boulders', if horizontally widespread, could act as a preferred horizontal migration route for <br />impacted fluids during periods of high ground water elevation. <br />Sample water produced from the municipal water well and analyze for metals, VOCs, and <br />total cyanides. <br />Plating Bath Areas <br />Advancement of four soil borings to 30 feet bsg, three stepping out in unassessed directions <br />from boring B7 and a deeper boring adjacent to B7 to obtain soil and ground water samples <br />to analyze for the target metals and pH to determine the extent of impacted soil. If possible, <br />an additional continuous core will be collected in the plating bath area to correlate soil types <br />and contacts with those collected in the tank storage area and on the adjacent site. Soil <br />samples in subsequent borings will be collected in the step -out borings at projected points <br />of contact of contrasting soil compositions. In addition, a grab ground water sample will be <br />collected from the B7 twin boring. Selected soil sample and the grab ground water sample <br />will be analyzed for pH; one soil sample per boring and the grab ground water sample will <br />initially be analyzed for the target metals. As noted in Section 2.2 above, the drilling log for <br />the California Water Service well on the adjacent site shows yellow clay from near surface <br />to 26 feet below surface grade (bsg); from 26 feet to 30 feet bsg the log shows boulders. The <br />boulders, if present on the subject property, may make obtaining the proposed total depth and <br />the grab ground water sample difficult and could provide a preferred horizontal migration <br />route for impacted fluids during periods of high ground water elevation. <br />Advancement of one soil boring adjacent to the floor drain in the eastern portion of the <br />material preparation area to obtain soil samples to analyze for the target metals and pH. The <br />floor drain provides a potential vertical migration route into the subsurface for releases in the <br />area. The boring will be advanced to a total depth of 20 feet bsg with samples to be collected <br />at projected points of contact of contrasting soil compositions. Selected samples will be <br />analyzed for pH, a shallow soil sample will initially be analyzed for the target metals. <br />Advancement of one soil boring in the former solder flux room to obtain soil samples to <br />analyze for the target metals and pH. Depth of boring, sampling and analyses will be the <br />same as noted above for the floor drain area. <br />Advanced Geo Environmental, Inc <br />