SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

WASTE DISCHARGE REQUIREAS ORDER NO. 5-01-251 • 19 CITY OF LATHROP AND CROSSROADS CREA LLC WASTEWATER TREATMENT PLANT NO. I (CROSSROADS), SAN JOAQUIN COUNTY listed in, the first section of Attachment C, "Items to be Included in a Monitoring Well Installation Workplan and a Monitoring Well Installation Report of Results. " If the Discharger believes that the monitoring wells need to be disinfected,then the workplan shll contain such a proposal. Disinfection shall take place before the first quarter 2001 samples are collected. e. By 30 June 2002, the Discharger shall submit a groundwater well installation report. The report shall be consistent with, and include the items listed, in the second section of Attachment C. f. By 30 September 2003, the Discharger shall submit a Background Groundwater Quality Study Report. For each groundwater monitoring parameter/constituent identified in the MRP, the report shall present a summary of monitoring data, calculation of the concentration in background monitoring wells, and comparison of background groundwater quality to that in wells used to monitor the facility. Determination of background quality shall be made using the methods described in Section 20415(e)(10) of Title 27, and shall be based on data from at least four consecutive quarterly(or more frequent) groundwater monitoring events. For each monitoring parameter/constituent, the report shall compare measured concentrations for compliance monitoring wells with: 1)the calculated background concentration, and 2) the interim numeric limitations set forth in Groundwater Limitation E.La. Where background concentrations are statistically greater than the interim limitations specified in Groundwater Limitation E.La,the report shall recommend final groundwater limitations for waste constituents listed therein. Subsequent use of a concentration as a final groundwater limitation will be subject to the discretion of the Executive Officer. g. By 30 November 2003, the Discharger shall submit a BPTC Evaluation Workplan that sets forth the scope and schedule for a systematic and comprehensive technical evaluation of each component of the facility's waste treatment and disposal system to determine best practicable treatment and control for each waste constituent listed in the Groundwater Limitation E.La of this Order. The workplan shall contain a preliminary evaluation of each component of the W WTF and effluent disposal system and propose a time schedule for completing the comprehensive technical evaluation. The workplan shall be prepared and certified by a California registered civil engineer. The schedule to complete the evaluation shall be as short as practicable, and shall not exceed one year. h. By 30 January 2004, the Discharger shall submit a BPTC Evaluation Report and Implementation Workplan. The report shall include a comprehensive evaluation of the BPTC measures studied, a discussion of BPTC measures proposed for implementation (i.e.,recommendations for W WTF modifications), estimated concentration or mass loading reductions for each BPTC measure, specific methods the Discharger proposes to monitor and assure continuous optimal performance of BPTC measures, the source of funding, and proposed schedule for modifications. The schedule for full implementation shall be as short as practicable, and in no case shall it exceed four years past the Executive Officer's approval of the workplan unless specifically approved by the Board. The component evaluation, recommended improvements, and implementation schedule are subject to the Executive Officer's approval.