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WASTE DISCHARGE REQUIREMENTS FOR -3- CITY OF TRACY CLASS H LAND TREATMENT FACILITY SAN JOAQUIN COUNTY as "designated wastes" unless the Discharger demonstrates either a "nonhazardous solid waste" or "inert waste" classification, using the criteria set forth in Chapter 15. 10. The Discharger has presented the results of a bench-scale study showing that the soils stored in cells numbers 1,7 and 19 of the treatment facility are amenable to remediation via biostimulation methods. These soils came from the Schulte Road project and are contaminated with Bunker oil. The bench-scale study showed overall 11.9% decrease in total oil and grease (TOG) concentrations after two months. A field-based treatability study, as specified in Chapter 15 Section 2532 (b)(5) has not been performed. The Discharger agrees to present further information and a specific workplan showing that the proposed biological treatment is an effective technology for degradation of Bunker oil and other heavy oil fractions and benzene, toluene, xylenes, and ethylbenzene (BTXE), and that can render these soils appropriate for beneficial reuse. 11. After treatment, the soils are to be removed from the Class H land treatment unit and to be used in specified City of Tracy construction projects. In a letter dated 17 June 1994, the City proposed re-use of all the soils that could be treated to a level that would pose no threat to water quality in specific projects related to improvements for the I-205 Corridor. The specifically named projects include work on Grant Line Road, Corral Hollow Road, and construction of an I-205 interchange. The City agrees to notify the Regional Board before removing the soils to these sites, and to obtain prior approval from the Regional Board before substitution of any uses other than those listed in this Finding. 12. The City will submit, for staff review, evidence of suitable ground water and soil conditions at each site proposed for re-use of the soils, in order to ensure that potential threats to water quality will be minimized. The City has stated, in a meeting on 25 May 1994, that, once treated, the soils will be reused within 18 months. Recycling of waste is an activity which is exempt from Chapter 15, under Section 2511 (h); however, any discharge of residual wastes from a recycling operation is not exempt from the requirements of Chapter 15. SITE DESCRIPTION 13. The treatment facility is between Corral Hollow Road and the Delta-Mendota Canal. A portion of the site is occupied by an easement allowing the U.S. Bureau of Reclamation access to the canal for maintenance. The Discharger has agreed to maintain the site in a manner that allows access to the canal at all times.