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Nations Groundwater Associates <br /> IIY OROCEQ f.OGISTS&GEOLOGISTS = <br /> August 15, 1990 <br /> Me. .lane Hlnaon <br /> San is Mean County RECEIVED <br /> public Health untyices <br /> 445 H. Ban Joaquin <br /> BOX 2009 <br /> Stockton, California'951.1 ADO 17 1990 <br /> ENVIRONMENTALLTN <br /> ) <br /> . . subjects 6011 stockpile sampling PERMIT/SERV(CES _ <br /> Lookeford Beacon Mini He rt <br /> 13975 E. Highway 90 <br /> Lockeford, Cnl ifornia <br /> HCA project No. 10-90-104 I <br /> Gear He. Hinson; <br /> The purpose' f this letter in to present a plan for ampling <br /> stockpiled <br /> eotl at the s bjent site. The purpose P111. or will. <br /> b to conflrm what we antialpate will be Vary ler or on-detectlble - <br /> ,J levels Of petroleum hydrocarbons prior to off- to disposal of the <br /> soil. There ar appraxlmately 400 to 600 yardaof it atockp it IId <br /> -cite Cr on'the removal of Undergrond stetage Tanks (U STs) Ecom <br /> the sitak in late March, 1990. Thi.,Bail has been aerating since. <br /> its removal from the tank baefn under the prdyleioRs of Rule 409 <br /> (uncontrolled aeration) of the Air pollution Rules and Regulations <br /> of the San Jcaquln County Alr"llabpo.Control District. <br /> our propaaed soil aampling plan eonelots of taking a tot of four <br /> P' <br /> aBite sail samples in-ample a ery 100 to 150 yards )from the <br /> tackplle at the .stations shown on.Figure a. soi3 sample.w121 <br /> to taken from a depth ae one to two peek beneath the outface of the f <br /> Stockpiled A total.1 five samples rill be taken far ea an 100 to I <br /> V 150 yard9 0[Hall. Thu samples will be 0011..ted-ln 40 milliliter <br /> glass Vials and stared ob ice prior to and,during shipment to a <br /> ealifoznia-eertlpled laboratory for analyels, prapor chain-of- <br /> cU.tody documentation will accompany the aumples:. - <br /> Samples deelgnated A-E {for each loo to 150 yards•of ea!1) will ba <br /> Camposlted in the laboratory end a alyzed for benzene. toluene, <br /> 'I ethylbenzene, xylan.. (STHX)) 3,z-diahlaroet-hann (EDC)' ethylene <br /> j dibromlde (HO$)i and total putgenble I'dr..arbana )TPJ)) by EPA <br /> method 529,a/8a60: Results of sa 11 Ramp2 ing from bon.ath the UST. <br /> have shown that lead is not a concern in these soile. Laboratory. <br /> report, for soils samples taken beneath the removed-00T.'are <br /> L� enolo..d. <br /> 105.171.Llrcle,Sailf 101 3enemenl,,Celifomie 9583] (916)761-6095 <br /> (916)361-1}80 FAX ,,, _ <br />