Laserfiche WebLink
r <br /> v ti <br /> _ Maio P.O. Box 576981-6981 <br /> M.J. Kloberdanz & Associates Modesto, California 95357 <br /> Environmental Assessment Phone: (209) 577-8186 <br /> Fax: (209) 577-8158 <br /> 39 September 7, 2000 <br /> Jeff Wong, REHS <br /> San Joaquin County <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> RE: <br /> Work Plan <br /> Subsurface Soil and Groundwater Investigation <br /> Manteca Unified School District, 660 Mikesell Avenue <br /> Manteca, California <br /> 1.0 PROJECT IDENTIFICATION <br /> The following plan provides a scope of work that will help characterize the petroleum <br /> contamination disclosed during the underground tank removal at the above referenced <br /> property. We propose the use of a Geo-Probe to obtain soil and ground water samples for <br /> the preliminary characterization of the lateral and vertical extent of contamination. <br /> 1.1 Site Description and History <br /> Two underground fuel tanks were removed under permit in November 1998 by <br /> SEMCO. Moderately high levels of diesel were present in the sample (Diesel D-2 <br /> @ 3') obtained from three feet in depth under the diesel fuel dispenser. Samples <br /> collected from the diesel and gasoline tank excavation and the gasoline dispenser <br /> were non-detect for the compounds analyzed. <br /> Table of Laboratory Sample Results November 1998 <br /> Sample I.D. Gasoline Diesel Benzene Toluene E-Benzene I Xylenes 1 8260 Lead <br /> Gas D-143' ND NA ND ND ND ND ND 46 <br /> Diesel D-2(43' NA 1100 ND ND ND ND NA NA <br /> West 1(d'10' ND NA ND ND ND ND ND 8 <br /> West 2A9.5' NA ND ND ND ND ND NA NA <br /> SP-1 ND NA ND ND ND ND ND 11 <br /> SP-2 NA ND ND ND ND ND ND NA <br /> ND=Non Detect NA=Not Analyzed Gasoline&Lead in mg/Kg BTEX&8260 in gg/Kg <br /> 2.0 WORK PLAN <br /> M. J. Kloberdanz & Associates proposes to drill three soil borings to first groundwater, <br /> approximately 20 feet in depth. The Geoprobe borings will be drilled in the area between <br /> the dispenser and former underground diesel tank and inside the building adjacent to the <br />