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WASTE DISCHARGE REQ, t._.;ANTS ORDER NO. 5-01-145 KNIFE RIVER CORPORATION DBA KRC AGGREGATES AGGREGATE MINE AND WASTEWATER SYSTEM . SAN JOAQUIN COUNTY standards: The Discharger shall comply with the.standards and,time schedules contained in.40 CFR 503 whether or not they l ave been:incorporatedinto;this Ordex. D. Groundwater Limitations: The discharge in co m binat' ion with other site.derived sources, shall not cause.underlying oundwater gr to:contain waste cons ' tatuents.in concentration statistically greater than background water quality, except for.coliform�bacter a For coiifo ""' l'acteria; increases shall not cause the most probable number of total coliform organisms-to exceed 2.2 MPN/100 ml I€ over any 7-day period, E. Provisions: L The following reports shall be submitted pursuant to Section 13267 of the California Water Code: a. By 22 August.2001, the Discharger shall submit a report, prepared by a California Registered Engineer, which describes the freeboard measurement locations for all ponds, or a pond location area. The freeboard measurement location shall be consistent with Discharge Specification B.12. b. By 21 September 2001, the Discharger shall submit a report describing how the washwater flow rate is measured. If required, a meter shall be installed by this date. c. At least 180 days prior to comme Y P ncement of manufacturing Readymix concrete using Portland Cement 4 nt or an asphalt plant, the Discharger shall sub rut a workplan showing the facility modifications necessary to contain and treat/dispose/recycle all wastewater from adversely impacting groundwater or surface water and shall clearly demonstrate how the proposed facilitymodifications will meet compliance with all Discharge Prohibitions, Specifications, and Limitations of this Order. The report shall be prepared under the supervision of a California Registered Engineer or Engineering Geologist. d_ At least 90 days prior to commencement of manufacturing Readyn.nx concrete using Portland Cement or an asphalt plant, the Discharger shall submit a report, prepared by a California Registered Civil Engineer or Engineering Geologist, showing that all the concrete wastewater facility modifications necessary to protect water quality have been completed_ 2. The Discharger shall comply with the Monitoring and Reporting Program No. 5-01-145, which is a part of this Order, and any revisions thereto as ordered by the Executive Officer. 3. The Discharger shall comply with the "Standard Provisions and Reporting Requirements for Waste Discharge Requirements", dated 1 March 1991, which are attached hereto and by reference a part of this Order. This attachment and its individual paragraphs are commonly referenced as "Standard Provision(s)."