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WASTE DISCHARGE REQUIREMENTS ORDER NO. 0 MUSCO FAMILY OLIVE COMPANY AND THE STUDLEY COMPANY 14 WASTEWATER TREATMENT FACILITY SAN JOAQUIN COUNTY constituents, decomposition by-products, and dissolved minerals out of the treatment zone. Absent sufficient sustained reliable attenuation of residual waste constituents in the remaining soil profile, the constituents will eventually discharge into groundwater. Temporary storage of residual waste constituents within the soil column can misrepresent the effectiveness of the process. 69. Section 13173(b) of the CWC, defines designated waste as: "Nonhazardous waste that consists of, or contains, pollutants that, under ambient environmental conditions at a waste management unit, could be released in concentrations exceeding applicable water quality objectives or that could reasonably be expected to affect beneficial uses..." 70. Consolidated Regulations for Treatment, Storage, Processing, or Disposal of Solid Waste, as set forth in Title 27, California Code of Regulations, §§20005 et seq., (hereinafter Title 27) specify types of waste that must be fully contained and prescribes standards for containment, including for designated waste. 71. Title 27, §20210, specifies criteria for containment and disposal of designated waste constituents on land. Liquid designated waste in surface impoundments is subject to full containment with double liners in accordance with standards prescribed in Title 27. Land treatment of designated waste is subject to standards prescribed by Title 27 for a Class I or Class H land treatment unit (LTU). Title 27, §20164, defines LTU as a, "waste management unit (Unit) at which liquid and solid waste is discharged to, or incorporated into, soil for degradation, transformation, or immobilization within the treatment zone." It defines treatment zone as, "a soil area of the unsaturated zone of a land treatment unit within which constituents of concern are degraded, transformed, or immobilized." 72. Designated waste subject to the Title 27 prescriptive and performance standards for a LTU may qualify for conditional exemption from Title 27 pursuant to section 20090(b). A discharge of decomposable waste that need not be managed as a hazardous waste can be exempted under section 20090(b) if all waste constituents are treated and controlled to a degree that the discharge complies with the Basin Plan. Documentation for such exemption must at least equal the scientific rigor of the test plot required as a prerequisite of approval of a Title 27 LTU. 73. Performance standards of Title 27 applicable to LTUs require that: a. The Discharger demonstrate prior to discharge that the LTU can completely degrade transform, or immobilize designated waste constituents in the treatment zone(§20250(b)) which cannot exceed 5 feet; b. The Discharger establish prior to discharge the appropriate design depth of the treatment zone for each designated waste constituent, not to exceed five feet below the initial ground surface (§20250(b)); c. The Discharger establish prior to discharge to the LTU a site-specific Water Quality Protection Standard(§20390) for each designated waste constituent (under §20395),the concentration limits (under §20405), and the Point of Compliance and all Monitoring Points (under §20405);