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October 15,2014 <br /> Ms.Cori Condon <br /> Page 4 of 5 <br /> Reference: Addendum to Data Gap Assessment Work Plan <br /> Table 2, below, provides a revised list of proposed wells. The attached Figure 1 illustrates the new <br /> proposed well locations that have been changed to comply with the CVRWQCB request. <br /> Table 2: Revised List of Proposed Wells for Installation <br /> Boring Casing Screen <br /> Well/Boring Zone Depth 0 0 Top Bottom Justification <br /> ID (ft bgs) (inch) (inch) (ft bgs) (ft bgs) <br /> B-26* B 55 2.5 NA NA NA See CVRWQCB 9/17 Letter <br /> B-27* B 55 2.5 NA NA NA See CVRWQCB 9/17 Letter <br /> CMW-8C C 80 8 2 70 80 See CVRWQCB 9/17 Letter <br /> SMW-24A A 30 10 4 15 30 Assessment <br /> SMW-24B B 55 10 4 45 55 Fill identified data gap <br /> SMW-25A A 27 10 4 12 27 See CVRWQCB 9/17 Letter <br /> SMW-25B** B 60 8 2 50 60 See CVRWQCB 9/17 Letter <br /> SMW-26A A 27 10 4 12 27 See CVRWQCB 9/17 letter <br /> SMW-26B B 60 8 2 50 60 Assessment <br /> SMW-27C C 80 8 2 70 80 Delineation <br /> SMW-27D D 120 10 4 110 120 Delineation <br /> SMW-28C C 80 8 2 70 80 Delineation <br /> SMW-28D D 120 10 4 110 120 Delineation <br /> SMW-29C C 80 8 2 70 80 See CVRWQCB 9/17 Letter <br /> SMW-29D D 120 10 4 110 120 See CVRWQCB 9/17 Letter <br /> SMW-30A A 30 10 4 15 30 Assessment <br /> SLMW-10C C 85 10 4 75 85 Delineation <br /> SLMW-10D D 120 10 4 110 120 Delineation <br /> SLMW-11D D 120 10 4 110 120 Assessment <br /> SLMW-12A A 27 10 4 12 27 See CVRWQCB 9/17 Letter <br /> Notes: <br /> Bold=revisions to the Table form the Work Plan PVC=Polyvinyl chloride 0=Diameter <br /> "Grab groundwater samples will be collected from soil borings B-26 and B-27 at approximately 20 and 55 ft bgs. <br /> *"This well ID is in a new proposed location from original work plan. <br /> The CVRWQCB also requested data from soil samples collected from the waste oil tank pits during <br /> tank removal or near the former tank pits from both the Chevron and ARCO sites. Stantec will <br /> conduct a historical records review to locate this data and include findings in the final Site <br /> Assessment Report. <br /> Design with community in mind <br />