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WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2004-0028 -9- WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2004-0028 -10-
<br /> CITY OF MANTECA,CITY OF LATHROP AND DUTRA FARMS CITY OF MANTECA,CITY OF LATHROP AND DUTRA FARMS
<br /> WASTEWATER QUALITY CONTROL FACILITY WASTEWATER QUALITY CONTROL FACILITY
<br /> SAN JOAQUIN COUNTY SAN JOAQUIN COUNTY
<br /> necessary to evaluate impacts to waters of the State to assure protection of beneficial uses and 26. The Discharger is expected to take all necessary steps to adequately maintain and operate its
<br /> compliance with Regional Board plans and policies,including Resolution 68-16,and to assure sanitary sewer collection system. This Order requires the Discharger to prepare and implement a
<br /> compliance with this Order. Evidence in the record includes effluent monitoring data that Sanitary Sewer System Operation,Maintenance,Overflow Prevention,and Response Plan.
<br /> indicates the presence of constituents that may degrade groundwater and surface water.
<br /> REASONABLE POTENTIAL
<br /> BIOSOLIDS
<br /> 27. California Water Code Section 13263.6(a)requires that"the regional board shall prescribe
<br /> 21. USEPA has promulgated biosolids reuse regulations in 40 CFR 503,Standard for the Use or effluent limitations as part of the waste discharge requirements of a POTW for all substances
<br /> Disposal of Sewage Sludge,which establishes management criteria for protection of that the most recent toxic chemical release data reported to the state emergency response
<br /> groundwater and surface waters,sets application rates for heavy metals,and establishes commission pursuant to Section 313 of the Emergency Planning and Community Right-to-Know
<br /> stabilization and disinfection criteria. The Regional Board is using the standards in 40 CFR 503 Act of 1986(42 U.S.C.Sec.11023)(EPCRA)indicate as discharged into the POTW,for which
<br /> as guidelines in establishing this Order,but the Regional Board is not the implementing agency the State Board or the regional board has established numeric water quality objectives,and has
<br /> for 40 CFR 503 regulations. The Discharger may have separate and/or additional compliance, determined that the discharge is or may be discharged at a level which will cause,have the
<br /> reporting,and permitting responsibilities to USEPA,which are not covered by this Order. reasonable potential to cause,or contribute to,an excursion above any numeric water quality
<br /> objective".
<br /> 22. Biosolids,food processing wastewater,and treated municipal wastewater are applied to the City-
<br /> owned lands. Only the treated municipal wastewater is applied to leased lands. This order The most recent toxic chemical data report does not indicate any reportable off-site releases or
<br /> requires that the City demonstrate that there is adequate capacity on the City-owned lands to discharges to surface waters for this facility. Therefore,a reasonable potential analysis based on
<br /> agronomically apply the food processing wastes and all biosolids. information from EPCRA cannot be conducted. Based on information from EPCRA,there is no
<br /> reasonable potential to cause or contribute to an excursion above any numeric water quality
<br /> COLLECTION SYSTEM objectives included within the Basin Plan or in any State Board plan,so no effluent limitations
<br /> are included in this permit pursuant to CWC Section 13263.6(a).
<br /> 23. The Discharger's sanitary sewer system collects wastewater using sewers,pipes,pumps,and/or
<br /> other conveyance systems and directs this raw sewage to the wastewater treatment plant. A However,as detailed elsewhere in this permit,available effluent data indicate that there are
<br /> "sanitary sewer overflow"is defined as a discharge to ground or surface water from the sanitary constituents present in the effluent that have a reasonable potential to cause or contribute to
<br /> sewer system at any point upstream of the wastewater treatment plant. Storage and conveyance exceedances of water quality standards and require inclusion of effluent limitations based on
<br /> facilities(such as wet wells,regulated impoundments,tanks,highlines,etc.)for temporary federal and state law and regulations.
<br /> storage may be part of a sanitary sewer system and discharges to these facilities are not
<br /> considered sanitary sewer overflows,provided that the waste is fully contained within these 28. USEPA adopted the National Toxics Rule(NTR)on22 December 1992,which USEPA revised
<br /> storage/conveyance facilities. on 4 May 1995 and 9 November 1999,and the California Toxics Rule(CTR)on 18 May 2000,
<br /> which USEPA revised on 13 February 2001. These Rules contain water quality standards
<br /> 24. Sanitary sewer overflows consist of varying mixtures of domestic sewage,industrial wastewater, applicable to this discharge. The State Board adopted the Policy for Implementation of Toxics
<br /> and commercial wastewater. This mixture depends on the pattern of land use in the sewage Standards for Inland Surface Waters,Enclosed Bays,and Estuaries of California(known as the
<br /> collection system tributary to the overflow. The chief causes of sanitary sewer overflows State Implementation Plan or SIP),which contains policies and procedures for implementation
<br /> include grease blockages,root blockages,debris blockages,sewer line flood damage,manhole of the National Toxics Rule and the California Toxics Rule.
<br /> structure failures,vandalism,pump station mechanical failures,power outages,storm or
<br /> groundwater inflow/infiltration,lack of capacity,and contractor caused blockages. 29. Federal regulations,at 40 CFR Section 122.44 require effluent limitations for all pollutants that
<br /> are or may be discharged at a level that will cause or have the reasonable potential to cause,or
<br /> 25. Sanitary sewer overflows often contain high levels of suspended solids,pathogenic organisms, contribute to an in-stream excursion above a narrative or numerical water quality standard.
<br /> toxic pollutants,nutrients,oxygen demanding organic compounds,oil and grease,and other Water quality standards include the National Toxics Rule,the California Toxics Rule,and Basin
<br /> pollutants. Sanitary sewer overflows can cause temporary exceedances of applicable water Plan water quality objectives. 40 CFR Section 122.44(d)sets forth requirements that apply to
<br /> quality objectives,pose a threat to public health,adversely affect aquatic life,and impair the the state to implement narrative water quality standards. 40 CFR Section 122.44(d)(vi)(A)-(C)
<br /> public recreational use and aesthetic enjoyment of surface waters in the area. requires the effluent limit to be based on one or more of three options,including using EPA's
<br /> water quality criteria,a proposed state criterion(i.e.,water quality objective),or an explicit state
<br /> policy interpreting its narrative water quality criteria(i.e.,the Regional Board's"Policy for
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