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10/14/97 08:54 12916 689 5010 STATE FARM SOSAC 006/007 <br /> developed based on our telephone conversation. Please be advised that PHS/UBD may revise the <br /> scope of work upon receipt of the workplan, <br /> Three soil borings will be advanced employing stem hollow auger to depths of approximately 60 <br /> feet below ground surface (bgs). Drilling will be conducted by a State licensed (C57) drilling <br /> company. A field geologist will be present to log all soil samples. Descriptions of soil types <br /> encountered and sample collection intervals will be recorded on baring logs. Soil samples will be <br /> collected at five-foot intervals or at changes in the lithology. Each soil sample will be field <br /> screened with a Photoionization Detection ('PID) meter or similar instrument and up to two <br /> samples from each of the three borings, based on field observations(i.e. odor, discoloration, PID <br /> readings), will be placed in a cooler with ice and submitted for laboratory analysis. <br /> Depth to groundwater for this area is estimated to be less than SO feet bgs. After groundwater <br /> has been allowed to accumulate in the boring, a grab groundwater sample will be collected. A <br /> disposable bailer will be lowered to approximately one foot past the point where groundwater is <br /> first encountered. When the groundwater sample has been collected, the soil sampling will <br /> continue to approximately 60 feet bgs. Following soil sample collection, the borings will be <br /> backfilled with cement grout to the surface. <br /> All drill cuttings, will be stored in 55-gallon DOT approved drums pending laboratory results. <br /> The disposal of soil cuttings is not included in this proposal. If necessary based on analytical <br /> results, an estimated budget for disposal will be prepared under separate cover. <br /> The advancement of three soil borings, and soil and groundwater sample collection will be <br /> completed in one full day of drilling. If field observations indicate the need for further <br /> investigation,PHS/EHD may request that borings be completed to a depth greater than 60 feet or <br /> that additional borings be advanced and soil and groundwater samples collected. The client <br /> would be contacted from the field to discuss the potential changes in the scope of work. <br /> Task 3: Soil Sample Analysis <br /> During a teleconference with PHS/EHD concerning the pending subsurface investigation of the <br /> your property, the proposed laboratory analysis was discussed. In response to a letter from the <br /> Regional Water Quality Control Board, PHS/EHD is requiring that all groundwater and selected <br /> soil samples at all former underground storage tank sites be analyzed for oxygenate fuel additives <br /> by EPA Method 8260. The addition of EPA Method 8260 to the list of required analysis for UST <br /> sites was very recent and not all consultants have incorporated this requirement into their cost <br /> estimates. The cost for EPA Method 8260 has been listed separately in Task 3 of the attached <br /> cost esf mate to assist you in your review of this proposal. A copy of the letter from the Regional <br /> Water Quality Control Board requiring this additional analysis is contained in Attachment 1. <br /> All soil samples will be immediately placed in a cooler with ice and delivered under chain-of- <br /> custody documentation to a State-certified analytical laboratory, Samples will be analyzed for <br /> ..-a"VNFVso92?.dW 2 <br /> 0 <br />