Laserfiche WebLink
ENVIRONMENTAL HEALTH IMPARTMENT <br /> 'O pq U l IV CO <br /> <• 'Z� Donna K. Heran, R.E.H.S. SAN JOAQUIN COUNTYProgram Coordinators <br /> 304 East ast Weber Avenue,Third Floor Carl Borgman, R.E.H.S. <br /> • "� � Laurie A. Cotulla, R.E.H.S. Stockton,California 95202-2708 Mike Huggins, R.E.H.S.,R.D.I. <br /> C4��FpRa`P Assistant Director Telephone: (209)468-3420 Margaret Lagorio, R.E.H.S. <br /> Robert McClellon, R.E.H.S. <br /> r -- Fax: 209 464-0138 <br /> ) Jeff Carruesco, R.E.H.S. <br /> Website:www.sigov.org/ehd/ Kasey Foley, R.E.H.S. <br /> FRED BERTETTA JR AND JANET HEIKEL NOV 0 2 2006 <br /> OLYMPIAN <br /> 1300 INDUSTRIAL ROAD <br /> SUITE 2 0 copy <br /> SAN CARLOS CA 94070 <br /> RE: Jimco Truck Plaza SITE CODE: 1604 <br /> 1022 Frontage Road (Formerly 22502 S. Highway 99) <br /> Ripon, California <br /> San Joaquin County Environmental Health Department (EHD) has reviewed Work Plan <br /> for Additional Site Assessment Addendum (work plan), dated September 27, 2006, <br /> prepared and submitted by Cambria Environmental Technology, Inc. (Cambria) on your <br /> behalf for the above-referenced site. In this work plan Cambria proposes a two-stage site <br /> investigation. The first stage will include the advancement of three cone penetrometer <br /> testing (CPT) borings to electronically log subsurface lithology and qualitative <br /> contaminant levels of volatile organic contaminant; and based on this information, <br /> advance paired borings adjacent to each CPT boring to collect depth-discrete <br /> groundwater samples for laboratory analysis. The second stage will include the <br /> advancement of ten direct push Geoprobe° borings while continuously logging soil <br /> lithology and collecting soil samples based on field observations as well as grab <br /> groundwater samples at total depth for laboratory analysis. <br /> EHD has already approved the locations for the three CPT borings and ten Geoprobe° <br /> borings by letter dated August 28, 2006. Furthermore, EHD concurs with Cambria's <br /> recommendation to advance the first CPT boring to total depth of 100 feet below grade <br /> surface (bgs) adjacent to monitoring well MW-1, and based on data from this CPT <br /> boring, advance the two remaining paired CPT borings to between 80 and 100 feet bgs <br /> while collecting two to three depth-discrete groundwater samples from the adjacent <br /> paired borings for laboratory analysis. <br /> EHD also approves the second-stage site investigation involving the advancement of ten <br /> Geoprobe° borings to depths of 25 feet bgs, or deeper, based on results from the CPT <br /> investigation and on field observations and photo ionization detector (PID) readings. <br /> Between two and six soil samples per boring will be collected based on "visual <br /> observations, lithologic changes, and PID readings," in addition to the one grab <br /> groundwater sample. <br />