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11, 11 Injil'' <br /> DRAFT <br /> RECYCLING OF PETROLEUM CONTA-MINATED SOILS_ <br /> IN COLD MIX ASPHALT PAVING MATERIALS <br /> By <br /> Terry C. Sciarrotta <br /> Southern California Edison Company <br /> Environmental Research <br /> 2244 Walnut Grove Avenue <br /> Rosemead, CA 91770 <br /> ABSTRACT <br /> Sandy soils contaminated with number 6 fuel oil were used in the <br /> construction of light duty service road. The pavement was <br /> prepared using cold mix technology and should be distinguished <br /> from other studies of hot batching technologies. The road has <br /> been in service since its construction in August 1989 and thus <br /> far has performed satisfactorily for its designated light duty <br /> pavement use. <br /> Samples of asphalt pavement containing the petroleum contaminated <br /> sands and pavements containing clean sands were analyzed for <br /> polynuclear aromatic hydrocarbons (PNAH) , toxic metals, and <br /> subjected to aquatic bioassay toxicity testing. Neither sample <br /> contained detectable concentrations of PNAH compounds nor regu- <br /> lated concentrations of toxic metals, and a zero mortality rate <br /> was recorded during the bioassay testing of both samples. <br /> PURPOSE <br /> The purpose of the study was.to evaluate the hazardous <br /> characteristics of cold mix asphalt pavements containing both <br /> petroleum contaminated sands and- clean sands. Research sponsored <br /> by the United states Environmental•Procection Agency (US EPA) , <br /> thd--Electric Power Research Institute (EPRI) and several state <br /> agencies has suggested that asphalt incorporation may be useful <br /> for treating petroleum contaminated soils and other. wastes. <br /> However, the most often cited reservation about thzs technology <br /> is the potential for MITAH releases and hydra::arbon air emissions. <br /> in most cases these studies were ba_ed upon the use of hot <br /> batching technologies. <br /> j . <br /> While cold mix technology produces a lower Trade pavement, these <br /> pavements may be suitable for light duty use. They asphalt grade <br /> employed, in this technology is characterized by a low PNAH <br /> content and, in the case of slaw curiaq blends, are relatively <br /> nen-vr,latile. Hydrocarbon e-issicns are also reduced bocause the <br /> mixirg occurs at arbient Ite-riperauures avoidin_t the potential <br /> emissions-frau-fuel- combustion-and-volati7. i_�3tiQ 1 of- tY:e i ;rater------ <br /> _ asphalt fractions.t 2 For this rean;cn, c;ld nix azphalt <br /> incorporation is not subject to p,:rmittiinq ::Y the South Coast Air <br /> f <br />