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Project No. 034-98081 <br /> Page No. 7 <br /> . g <br /> f sample from the capillary fringe at each borehole location and analyze for BTEX/TPH- <br /> L•� G. Construct wells in each borehole, tentatively screened from 55 to 35 feet bgs. <br /> Secure each well with flush-mounted well vaults. Develop wells after construction. <br /> T, <br /> • Conduct one round of sampling of all wells and°analyze samples for BTEX/TPH-G. <br /> • Prepare a report of findings..1 <br /> i <br /> ii <br /> 7.0 METHODOLOGY <br /> 1. <br /> The methods proposed to accomplish the purpose and scope of;the additional site assessment are listed <br /> below. The assessment activities would be accomplished in accordance with the Regional Water QuaIity <br /> Control Board (RWQCB) Tri-Regional Board guidelines and the requirements listed- in the <br /> "Recommendations for'Preliminary Investigation and Evaluation of Underground Storage Tank Site." A <br /> copy of this workplan will be submitted to the SJCEHD for review and written approval before <br /> commencing the field investigation. The field work will commence once the workplan has been <br /> 11 approved and permits have been issued by the1 applicable regulatory and/or municipal agencies. j <br /> Phase Y <br /> 1. A subsurface assessment permit will be obtained;from the SJCEHD. <br /> H <br /> 2. Before the commencement of drilling activiti i''s, Underground Services Alert <br /> T <br /> (USA) will be contacted to locate public underground utilities associated with <br /> USA Subscribers. <br /> I d <br /> $ <br /> C3. Two soil borings will be advanced in the vicinity of the former gasoline UST by <br /> L <br /> a Geoprobe® direct push rig:y(Figure.No. 3). Drilling fluids will not used while <br /> advancing the borings. Each boring will be advanced to a depth of 40 feet bgs. <br /> 4. Soil boring samples will be 0..1btained for logging purposes at five foot intervals, <br /> beginning at 5 feet bgs. Soilswill be logged in accordance with the Unified Soil <br /> Classification System. <br /> + d <br /> 5. Sampling will be conducted by means of a driven-spoon sampler containing a I- <br /> inch diameter acetate sleeve. <br /> 6. Sampling will be conducted inn accordance withT,the guidelines published by the <br /> Regional Water Quality Control Board (RWQCB). <br /> KRAZAN&ASSOCIATES,INC. <br /> Offices Serving the Western United States <br /> 3498081.WP <br />