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J ENVIRONMENNAL HEA } TH DEPARTMENT <br /> c N SAN JOAQ�JI �I �.® NTY UnitSuperrisa:s i <br /> P j N <br /> Carl Borgman, R.E.H.S. <br /> 2:: _'!��"'•` :2 Donna K.Heran,R.E.H.S. <br /> Director 304 East Weber Avenue;Third Floor Mike Huggins,R.E.H.S.,R.D.I. <br /> Al[}Isen,R.E.H.S. Stockton, California 95202-2708 Douglas w.Wilson,R.E.1l.S. <br /> ,. <br /> • �.. �p Program!Manager Telephone: (209) 468-3420 Margaret Lagorlo,R.l.l I.S. <br /> 4�lFt� <br /> Laurie A.Cotnlla,R.E.H.S. Robert McClellon,R.E-H. . <br /> OP <br /> Progranz Manager Fax: {209} 464��13 8 Mark Barcellos,R.E.H.S. <br /> I! <br /> ! I <br /> ALLEN FETTERS JAN 1 2005 <br /> RIPON FARM SERVICE INC E <br /> 3705 PORTSMOUTH CIRCLE <br /> NORTH STOCKTON CA 95219 ' <br /> RE: Ripon Farm Service Inc. i <br /> 932 South Highway 99 (Formerly 22871 South Highway 99)!1, <br /> Ripon,CA 95366 <br /> WORKPLAN: Additional Site Assessment Work Plan <br /> DATED: November 1, 2004 <br /> PREPARED BY:_ ddynnced GeoEnvironmental,Inc. <br /> APPROVED X 1i <br /> DISAPPROVED ❑ <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPL N [Health&Safeh'Code(H&S) Section <br /> k 25296.10(c)(3)1: . <br /> 1. Advancement of three soil borings to be completed as groundwater monitoring wells for the delineation <br /> of the lateral extent of hydrocarbon-impacted groundwater. r <br /> 2. Soil samples will be collected at five-foot intervals,beginning at five feet below surface grade(bsg), <br /> to ascertain soil lithology; soil samples having field indications of petroleum hydrocarbons,using a <br /> photo ionization detector or visual inspection,will be sent to a California-certified environmental <br /> laboratory for analysis. �} <br /> Il ;, <br /> 3. Selected soil samples will be analyzed for: <br /> • Total petroleum hydrocarbons as gasoline(TPH-G)by United States Environmental Protection <br /> Agency(EPA)SW-846 Method 8015B G <br /> • Total petroleum hydrocarbons as diesel(TPH-D)by EPA SW,846 Method 8015B <br /> • Benzene,toluene,ethyl benzene, and total xylenes(BTEX)by EPA SW-846 Methods 8021 or <br /> 8260B I <br /> • Methyl tertiary-butyl ether(MTBE),Tertiary butyl alcohol(TAA),di-isopropyl ether(DIPS), <br /> ethyl tertiary-butyl ether(ETBE),tertiary amyl methyl ether(TAME),methanol,ethanol, <br /> ethylene dibromide(EDB),and 1,2-dichloroethane(1,2-DCA),by EPA SW-846 Method 826013. <br /> 4. Groundwater samples collected during the quarterly monitc'ring events will be analyzed for: <br /> } <br /> • Total TPH-G and TPH-D by EPA SW-846 Method 8015B <br /> • BTEX by EPA SW-846 Methods 8021 or 8260B ji p <br /> • MTBE,TBA,DIPE, ETBE,TAME,EDB, and 1,2-DLA by EPA SW-846 Method 826013. <br /> r samples,if possible. <br /> 5. Report 1,2-DCA and EDB at 0.5 micrograms per liter(µg/>�)in gr`undwatej <br /> s {i <br /> r I>° <br /> i <br />