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WASTE DISCHARGE REQUIREMENTS ORDER NO. 2000-**** -20- <br /> CITY OF LODI <br /> WHITE SLOUGH WATER POLLUTION CONTROL PLANT <br /> SAN JOAQUIN COUNTY <br /> measures for effluent toxicity. The TRE needs to be site specific but should follow EPA <br /> guidance and be conducted in a step-wise fashion. The following is a tiered approach in <br /> conducting the TRE: <br /> Tier 1 includes basic data collection, followed by Tier 2, which evaluates optimization of <br /> the treatment system operation, facility housekeeping, and the selection and use of in- <br /> plant process chemicals. If unsuccessful in reducing toxicity, Tier 3, a toxicity <br /> identification evaluation (TIE) should be initiated and all reasonable efforts using <br /> currently available TIE methodologies employed. Assuming successful identification or <br /> characterization of the toxicant(s), Tier 4 is to evaluate final effluent treatment options <br /> and Tier 5 is to evaluate within plant treatment options. Tier 6 consists of follow-up and <br /> confirmation once the toxicity control method has been selected and implemented. <br /> Many recommended TRE elements parallel source control, pollution prevention, and <br /> storm water control program best management practices (BMPs). To prevent <br /> duplication of efforts, evidence of complying with those requirements may be sufficient <br /> to comply with TRE requirements. By requiring the first steps of a TRE to be <br /> accelerated testing and review of the facility's TRE workplan, a TRE may be ended in <br /> its early stages. All reasonable steps shall be taken to reduce toxicity to the required <br /> level. <br /> 11. The discharger shall conduct monitoring of groundwater upgradient and down gradient <br /> of the wastewater treatment facilities and the reclamation and biosolids disposal areas. <br /> An adequate number of wells shall be constructed to evaluate the impacts of the <br /> operations. Within 90 days of adoption of this permit, the Discharger shall submit a <br /> report regarding the adequacy of the existing wells for this purpose, and the need for <br /> additional well(s). Plans and specifications for any additional well(s) shall be submitted <br /> to.Board staff for review and approval prior to construction, and shall be installed within <br /> 90 days of approval. Any additional reclamation and/or biosolids disposal areas need <br /> adequate wells in place prior to use of those areas. <br /> If monitoring of the groundwater indicates that the discharge has caused an increase in <br /> constituent concentrations at the point of compliance, as compared to background, the <br /> Discharger will be required to conduct a study of the extent of groundwater degradation. <br /> If the study indicates the discharge has incrementally increased concentrations in <br /> groundwater, enforcement actions may be pursued and/or this permit may be reopened <br /> and modified. For purposes of this Provision, points of compliance will be established <br /> as near to the discharge areas as practical, but shall not extend beyond property owned or <br /> controlled by the Discharger. <br /> 12. The Discharger shall use the best practicable cost-effective control technique currently <br /> available to limit mineralization of both the domestic and industrial wastewater to no <br /> more than a reasonable increment. The Discharger shall submit a plan to limit <br />