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WASTE DISCHARGE REQUIREMENTS ORDER NO. -7- TEICHERT AGGREGATES AND CALAVERAS MATERIALS, INC. TRACY ROCK PLANT AND FLINTKOTE SETTLING PONDS SAN JOAQUIN COUNTY locations for all ponds, or a pond location area. The freeboard measurement location shall be consistent with Discharge Specification B.11. c. By 21 September 2001,the Discharger shall submit a water balance, prepared by a California Registered Engineer, which demonstrates the wastewater storage capacity is adequate to contain all rainfall and industrial wastewater that is discharged to the pond. Rainfall amounts shall be based on the total annual precipitation based on a return period of 100 years, distributed monthly in accordance with historical rainfall patterns. d. At least 180 days prior to operation of manufacturing Readymix concrete using Portland Cement or an asphalt plant, the Discharger shall submit 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 facility modifications 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. e. At least 90 days prior to operation of manufacturing Readymix 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. 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)." 4. At least 90 days prior to termination or expiration of any lease, contract, or agreement involving the disposal or reclamation areas,used to justify the capacity authorized herein and assure compliance with this Order, the Discharger shall notify the Board in writing of the situation and of what measures have been taken or are being taken to assure full compliance with this Order. 5. The Discharger shall submit to the Board on or before each compliance report due date the specified document, or if appropriate, a written report detailing compliance or noncompliance with the specific schedule date and task. If noncompliance is reported, then the Discharger shall state the reasons for noncompliance and shall provide a schedule to come into compliance. 6. The Discharger shall report promptly to the Board any material change or proposed change in the character, location, or volume of the discharge.