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NELSON READY MIX <br /> Report of Contaminated Soils Excavation <br /> ' Page: 2 <br /> i <br /> The soil consisted of fine to medium grained sand and some intermixed, fine gravel The <br /> color varied from light brown to reddish brown, and gray where contaminated with diesel <br /> The bulk of this material had been removed prior to M J Kloberdanz& Associates' arrival <br /> on the 14`h of June The geological ]rthology of this area has been previously determined <br /> by Wright Environmental Services and provided in their reports <br /> ' The material bung excavated on the 14th was considered to be contarnmated, and was <br /> segregated on separate piles Screening was conducted by SEMCO and GeoAnalytical <br /> ' Laboratories with a portable flame ionization detector and the soils stockpiled according <br /> to a reading above or below 100 ppm (see field notes in Appendix A) The stockpiles were <br /> sampled by a technician provided to the project by GeoAnalytical Laboratories of <br /> Modesto The samples were taken directly to the laboratory for analysis by the technician <br /> Laboratory data are provided in Appendix A and the following Table <br /> ' PETROLEUM LABORATORY SAMPLE RESULTS <br /> Diesel Benzene Toluene E-Benzene Total Xylenes MTBE <br /> ' (PPM) (PPS) (PPB) (PPB) (PPB) (PPB) <br /> SP-1A,1B 55 ND ND ND NO ND <br /> SP-2A,2B 270 ND ND ND ND ND <br /> SP-2C,2D 4800 NO ND NO NO ND <br /> SP-3A,3B 4300 NO NO NO 75 ND <br /> ' SP-4A,4B 1700 ND NO ND 210 NO <br /> SP-5A,5B 1200 NO No 130 360 ND <br /> SP-6A,6B 16001 ND NO NO ND ND <br /> Northeast 2700 ND ND ND 160 ND <br /> East Center 280 ND NO ND ND NO <br /> Southeast 4500 NO ND NO 200 NO <br /> ' Southwest 610 NO NO NO NO NO <br /> West Center 1300 ND NO NO NO NO <br /> Northwest 1 1 2100 ND ND NO NO ND <br /> ' ND=None Detected NA=Not Analyzed <br /> ' Corrosivity (pH) was checked on two of the above samples and found to be S 03) Std <br /> Units for sample East Center and 8 41 Std Units for sample West Center <br /> Upon completion of the excavation, the Public Health Services requested the weight of <br /> diesel that was removed with the contaminated soil from the excavation The volume of <br /> the excavation was calculated in two ways the 0 was by simply using the dimensions of <br /> ' the excavation itself(50 feet x 20 feet x 17 feet deep), and the 2"d calculation was made by <br /> using the volumes of the piles of soil removed from the excavation Assuming that all of <br /> the soil removed from the excavation was to the piles, a swell factor of 21% was <br /> calculated The weight of a dry, cubic foot of sand /gravel was taken to be 100 lbs /cubic <br />