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ENVIRONMENTAL HEALTH 11EPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Donna K. Heran, R.E.H.S. Unit Supervisors <br /> 304 East Weber Avenue,Third Floor <br /> c: Carl Borgman,R.E.H.S. <br /> W :� Director <br /> Laurie A. Cotulla, R.E.H.S. Stockton,California 95202-2708 Mike Huggins, R.E.H.S., R.D.I. <br /> Program Manager Telephone: (209)468-3420 Douglas W.Wilson, R.E.H.S. <br /> Cq'<<F .RMargaret Lagorio,R.E.H.S. <br /> Fax: (209)464-0138 Robert McClellon, R.E.H.S. <br /> Website:www.sjgov.org/ehd/ Jeff Carruesco, R.E.H.S. <br /> DUNG THANH & NHUAN LE <br /> 2224 KANTHEY ROAD <br /> STOCKTON CA 95206 <br /> RE: California Stop <br /> 2224 Manthey Road <br /> Stockton, California 95206 <br /> WORK PLAN: Cone Penetrometer Testing and Monitoring Well Installation Work Plan <br /> DATED: February 17, 2006 <br /> PREPARED BY: Advanced GeoEnvironmental. Inc. (AGES <br /> APPROVED X <br /> DISAPPROVED ❑ <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN [Health&Safety <br /> Code (H&S) Section 25296.10(c)(3)1: <br /> 1. Advancement of one paired cone penetrometer testing (CPT) soil boring to depth of <br /> approximately 100 feet below surface grade (bsg), located approximately 17 feet south of <br /> the current underground storage tank (UST) area, and collection of soil and grab <br /> groundwater samples from the adjacent twin boring. <br /> 2. Groundwater and selected soil samples will be analyzed for: <br /> Total petroleum hydrocarbons as gasoline (I'PH-g) and TPH-diesel (IPH-d) by <br /> United States Environmental Protection Agency (EPA) SW-846 Method 8015B; <br /> benzene, toluene, ethyl benzene, and total xylenes (BTEX), methyl tertiary-butyl <br /> ether (MTBE), tertiary butyl alcohol (IBA), di-isopropyl ether (RIPE), ethyl <br /> tertiary-butyl ether (ETBE), tertiary amyl methyl ether (TAME), 1,2-dibromoethane <br /> (EDB), and 1,2-dichloroethane (1,2-DCA) by EPA SW-846 Method 8260B. <br /> 3. Installation of three monitoring wells (MW-1, MW-2, and MW-3) to total depth of <br /> approximately 30 feet bsg with screen intervals from 10 to 30 feet bsg. One monitoring <br /> well will be located approximately 15 feet east of the USTS, one monitoring well will be <br /> located approximately 10 feet west of the USTs, and one monitoring well will be located <br /> approximately 40 feet south of the USTs. Soil samples will be collected from each <br /> boring at five-foot intervals for lithological description, field-screened for the presence <br /> of volatile organic compounds using an organic vapor meter, and selected samples will <br /> be analyzed by a State of California Department of Health Services certified <br /> environmental laboratory for the same analytes listed above. <br />