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FIROM :CITY OF RIPON+! 209-599-26$5 1999,03-I1 0$:21 tiO41 P.OS/O5 <br /> M&Wft1r Worm" M a <br /> Mr.Dale Ramey,PE <br /> MArch 14, l999 <br /> Page 4 <br /> Section 3.7: Disposition of Excavated Soil P <br /> 1. 1 girl skeptical that soil at this level and variety of diesel concentrations will be pro-approved for <br /> disposal. <br /> 2. The apptoach we have used mpeatedly is to place the soil on plastic shecft; collect Von positc <br /> samples as required by the disposal facility (typically every 500 cubic yards); seeme the lowest bid; <br /> and off-haul. <br /> 3_ The proposed sampling of stockpiles eVery SO cubic yards is wasteful,if not 10quircd by the disposal <br /> facility. <br /> 4. The proposed use of a photoionization detector(PW)gives concern about Wright's Meld experletnee. <br /> A PID does not detect tnosf cif the compounds that comprise diesel. The industry-standard <br /> instrument for diesel detection is a flame ionization detector(FID). Field chetnIM test kits aft also <br /> Lost-effective and useful. Field aWyticW1MotMoring is a crucial topic, since proper soil ac9rc9ati0V <br /> directly relates to sell disposal coats. <br /> Section 3.8. Excavation of ked Reil Pa a 9 <br /> 1. This section docs not appear to pfescnt a coherent reuse concept. Based on our experience at sindtA' <br /> sites, stockpile sampling at an interval agreed upon by PHSlEHD would have to occur, and <br /> pH5/EHD will then set reuse coxntamittant conoentt'ation Iitnits. Soils exceeding these limits will <br /> ttquire off-haul. Blanding of soils may be allowed to achieve the limits. A thorough understanding <br /> of how to reuse impacted soils is required to achieve this cost-saving procedum <br /> Please call me with any questions or concerns. Hollis and I enjoyed meeting with you yesterday,and <br /> boning in on the required work. <br /> URSGWC <br /> , has extensive experience with these types of projects, <br /> , luding cn ikntz ental construction contracting and field mansgeamt, ha=dous tdaierials <br /> management, modelitc, and site closure. We are eager to meet the City of Ripon's needs for this <br /> project. <br /> Sincerely yours. <br /> 1 <br /> CA�0-- <br /> Avrarn Franlctl <br /> URSGWC Project Manager <br /> cc: Des Gamer,URSGWC <br /> ova-m 50/U-d 450-1 t0 ME514 4s vvi3 9 sun:=JA lt:sl es-0140 <br />