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83 WEST MARCH LANE- <br /> .-SUITE 12 October 24,. 1990 <br /> STOCKTON,CA 95207 <br /> su PHONE:(209)476-1635 <br /> MANAGERS UJLTANTS <br /> Ms. .Margaret Lagorio EIVED <br /> t, <br /> 'Public Health: Services• -E <br /> San Joaquin County 0 C 2 5 1590 <br /> P.D. sox 2CA ENVIRONMENTAL HEALTH <br /> CA. ,3-520.1 <br /> PERMIT/SERVICES <br /> RE: Laura Studdeirs/Havarr.a. -R axch Prope'rty' <br /> 100 W'. .V�a p .-0 Ro, Tracy, Callfarnia <br /> Site Cade 74231 <br /> Dear Ms. _Laror3c; <br /> As,' a follow--up . to rere.n.t discussions with County pubiir._ Heal¢h <br /> Services: staff., regar_di.rg the ana-lytica1 procedure issu-es. used at <br /> the - sub ect P_rop'e t. and di s:cussed ix), WESTON's ;Sepftieinfer 25.; .1990 <br /> letter to- .Ms 7 "auti -C'r.�tulla, we understand . that the California <br /> Department of. Ilea :th. ' 5pnvice-- has supported WESTORv°'s conte ntior?. <br /> that analysis, of still nor bead-..was conducted-. by a procedure (EPA- <br /> -Method .6010) . equivalent to the County'sPref _reed method zEPA <br /> _ .74.21) . <br /> -it- is also.'WESTOtV s; understanding that .the County wishes to have a <br /> , letter fr.cm WESTON -directly ide' ntifying- the rircu'iastance's of the <br /> sampling .`and the .ana :yticul Tgr,�'.hodalogy used at tho_T `x-l. area <br /> at. the for .er' Lz,aura Sc dde,r s site. <br /> T'he following knfor ii vll ",on is a summary of data. taken from the <br /> "WES"ON proj'ect`.repoxt to Lura Scudders.•-entitled "Soil Ren-ed3_a.ti6n <br /> Proposal". cl.ated January. 1 ]; 99(} and additional WES'PQFd records: <br /> The T-1. . Tank:--j-1030 galleins): was. 'removed in May 19B9 and <br /> analys is .,Gf- in.it.i61.taLhk'.bottair, samples Indicated 'a' "Cotal leas. <br /> conc.1--nlra'ion-o _up.:to 61 3' ng,fRg. An organol'ead'a-axla._:y--;is -has <br /> conducted ..on ::c,ne of the tank excavation : samp:ies with .ion-- <br /> detectablE_>-re-su_lts.. est the rec;ucst of..San Jriacluiz ,Ccurty, . e:re <br /> ;.additional r�i.l sa'�irie � ai' collected.on Ja ivar' 24 , s990 frbt <br /> a .dFpth'..,of' 15. below- grade_,and--an&ly.zed for sc l°uble lead'. The <br /> County .c1ia. not specify in gar icular method of analysis. <br /> The soil sample, i:denti led as 11T-2 15--16.. 5 A,g1'. ( -he .SFzmr.)16 <br /> was ' taken :-from ,. the T-•i_ area even 'though- it was labeled <br /> ' T-2 — ",.3 , was analyzed for soluble -lead. by Jeachate <br /> tion by the. acidic 'EP .Toxi.city -Test .:and analyzed'.b'y FPA Method r <br /> 6010: - Ther entire. analyt-ical `report .for this test - signed 'by <br /> the' WESTON Laboratory manager at the time the-.,analyses.:were <br /> run,, is -Attached. The .results for lead were .non-detectable' at <br /> a. detection .level of 500 ug/L. <br /> . I <br /> i <br /> f <br />