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�_,�.�,5:'t�,}�, 11: 14 i���•a=.;F,aho �aI�E <br /> i <br /> `-` I= -_ --- —_------ <br /> - -- 2012 Val bEsn;in Parkway. Suite 400, E�[rtcktr:n, GA 35205 <br /> Telephone: 209.983,68'0 Facsimile 208.9 3.69G� <br /> CONESTO A-ROVERS www.C:RAworld.com <br /> &ASSOCIATES <br /> n 4 25,2000 Ref,No.197 <br /> Nti .Kim A.schtivab <br /> CIilk-mala Pegional WaLex <br /> Q ahty Control Board <br /> 3 Routier Rd-Suite A <br /> Stramento,CA 95527--30-95 <br /> R�. Analytical methods fcr 5oi1 and Grotutdwater,SttpplemiLit11 Soil and Groundwater <br /> I Sampling Program,La.tbxoP,fial.iforrua <br /> Dear h4s.Scnwab: <br /> C A Inc. (CPA),The Source Greup (TSG)and Glenn Springs Holdings Inc..(GS.-H' rsve <br /> re-eived your May 3,2000 responc-e to t'ne subnuttal cf The Supplemental Soil And <br /> G oundw ater Sampling Wotkplat+ dated April 28,20100 for Erie Grotuidwater Remedial <br /> Program in Lathrop,California. IVe are pleased that ye-YU corlcux with the objectives <br /> dE tailed in the workplan. We are,however,riot in agreement with the analytical <br /> n4thods reconwtendeci ill your response. <br /> U)jon r,eipt of yotu letter,our analytical laboratory,Agricultuxe&P riority Pollutants <br /> Ldboratory,jnc. "Ar-?L) of Fresno,California;,�•as contacted and.the issue of the <br /> reLornmended analytical methods for these sample::wa.discussed. APPL analyzes all <br /> of the remedial system.'s groundwater samples and has extensive experience with the <br /> t_iree compounds of concern, 1/1'han asked about the individual recommended methods <br /> role.the s=ple analyses,they felt that the method reconu-nended for&-P fumigant <br /> analysis would not lxa as Pre3i.ctable or as reproducible as the method that they <br /> C*rently use and the method recornmer;ded for*.e sulfola.ne anAlysis will not detect <br /> su ol.ane at at. In lieu.Of t}le recor2ui1ended methods,they suggested using the same <br /> mr tthods Etat are currently b?ing ttsed for. the remedial p.rogram.'y grou .dwater sa.niples. <br /> the Project when the analytical contract tiros <br /> T4ese methods`vere approvod for use on <br /> tr nsferred from Roy F.Weston,Inc. to APPL in July 1995. These recormnended <br /> m rods are: <br /> MCP;EDB-Califor-nia Assembly Frill"15,03 Method, APPL refers to this as a DOHS <br /> method, A detection liulit of 0.01 ugL is achieved. <br /> • 1 Sulfolm- -e-APPL uses an in house static-lard operating procedure.for the analysts of <br /> sulfoJ.ane• Tr eir protocol method standards for sample=preparation and sarnple <br /> analysis axeSFT 072 and 50PANTA5 LF,respectively. A detection IiTnit of 20 uS/L <br /> i is achieved. <br /> i <br /> Worldw.7do EnYlf4mmrantet,C—trunHon,end IT 6endee• <br />