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4s limitations as it provides for superior mixing and reduction in soil particle size and oil micelles. While the number and and length of treatment cells (windrows) are determined by the available space, beds are typically approximately 6 ' high x 10 'wide. Uriah would assist with the development of the fr windrows within a bermed treatment area to protect against the uncontrolled migration of free liquid as a result of rainfall or leachate formation. While the holding capacity of the amended 1J soil is high and free liquid is not likely to be a problem, should this condition arise, the liquid would be contained and either pumped back over the beds to ensure proper moisture, .� or contained in DOT drums pending analysis for subsequent disposal. The primary soil amendment utilized by Uriah is mushroom compost- an excellent bulking agent, buffer, source of hydrocarbon utilizing bacteria, and nutrient/moisture reservoir. The soil could be further amended for the purposes of pH adjustment and 1J nutrient maintenance in order to ensure the continued presence of an environment conducive to rapid degradation of fuel hydro- carbons. Periodically, (typically every other week, or as determined by site specific conditions) , during the treatment period of 8-10 weeks, interim sampling would be performed to acquire data `J regarding hydrocarbon degradation, intermediate product forma- tion, biological activity, and soil chemistry. •� Confirmation of project completion ( i.e. reduction of hydro- carbon contaminants to less than 90 parts per million, or as otherwise specified by the Central Valley Regional Water Quality Control Board) would be by certified laboratory analyses. It is proposed that one ( 1 ) composite soil sample will be collected for every 50 cubic yards of material under treatment. Each composite sample will be obtained by driving a clean brass sample 'J tube ( 1 . 92 inches in diameter and 6 inches in length) into the soil at four ( 4) randomly selected points per composite sample. The ends of each sample tube will be promptly wrapped with aluminum foil, fitted with plastic caps, sealed with black electrical tape, labeled, placed on dry ice, and then transported to a certified hazardous waste analytical laboratory under chain of custody for analysis for Total Petroleum Hydrocarbons as Diesel (TPH-D) using EPA Methods 3550/8015 and Total Oil and Grease (TOG) using SM 503 D&E. At the end of the treatment period, a report of work performed, which will include copies of certified laboratory analyses confirming degradation, will be submitted to your office. lJ If this proposal addresses your concerns regarding the referenced project, it is requested that a letter be provided to the client and Mr. Doug Wilson of the San Joaquin County Department of J �J U