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PUBLIC HEALTH SERVICES �pa <br /> SAIN JOA UIN COLN+TY <br />• <br /> ENVIRONMENTAL HE,�,I.TH DIVISION �►`�' `$ <br /> Ernest lit. Faiiinoto. NLD , M.P PL, enng Health Officer } <br /> 445 N San Joaquin Strut • P 0. Sox 388 • Stockton. CA 95201-0388 <br /> (209) -168-3420 <br /> W.A.DE 3ROUGHTON '! <br /> GEN+"E. AL MIL.L.S <br /> P O BOX 3002 GC 9 q Ivo <br /> LODI CA 95241-1906 ''` `• "` � �""` <br /> RE. General NE-111s = CODE: 133E <br /> 2000 West Turner Road <br /> Loci, C <br /> San Joaquin County Public Health Services. Envwo=enial Healtl'i DMs:on (PFS/=—:]D) rias <br /> comme.ed renew of the 'Worlk Plan for Acciiuonal Druling' dated April 17, 1994 anti <br /> oreoared ov Delta E.,r ronmenta.i. PHSr�=? has the following comments for your <br /> consideraticn. <br /> The work plan proposed three soil borings to be located in the areas where soil sarmpies <br /> T52tif, TSN, ana To—N, were collected at 13 feet below graae aurner :he 1991 tank removal. <br /> Sol! contamination has been acc-.unented in these areas of up to 820 ppm TPTh diesel. <br /> PHSiE:-1D requested adaiIIOnal sou investigation to derermne,the veracal e=ent of the <br /> acc-,imented sou contamination. During the ar:] i g of the proposed sou borings, soil <br /> samules are to be collected at rNe £Cot intervals for laboratory analysis. The total aepth <br /> of the proposed soil borings are a0 feet below grade. PNq/=-) assumes that soil samples <br /> wdl be collected beginning at 15 feet celow grace, since the tank pit has been bac:�filed with <br /> clean material. <br /> PHSIEHD concurs that the proposed investigation should adequately characterize the <br /> documented soil conta=anon. The leaching potential analysis referenced in the Leman <br /> Uiidera-round Fuel Tank Field Manual prepared by the State Water Resources Control <br /> Board. imitates what levels of soil contamination may pose a threat to groundwater. Based <br /> on site specznc conditions, soil type, location and seasonal high Cepth to ground water, up <br /> to 100 ppm TPH-diesel could be left in place at 25 feet below grade without coling a <br /> slgnincant threat to groundwater. <br /> Please suornit a permit application for the soil borings ana S89 to PF - UPon <br /> issuance of a drilling permit, field work may commence. Please provide PHS/ErID 48 hours <br /> nonct prior to itntia= f?eld work, so that PHS/= can witness soil sampling and grou=g <br /> of the boreholes. <br /> A r)1% %'On of San Juuyuin Counry Henith C.xre 4nrvrce-1 <br />