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.� California Regional Water Quality Control Board <br /> Central Valley Region ' <br /> Winston H.Hickox Robert Schneider,Chair <br /> Secretary for Gray Davis <br /> C Environmental Sacramento Main Office Governor <br /> j Internet Address: h ,Sacramento, <br /> California <br /> q 82 �����n 7T <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 I`J'�`1] ,`1J// <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> EID <br /> 30 August 2002 SEP 0 3 2002 <br /> ENVIRONMENT HEALTH <br /> Ms. Becky L. Wood <br /> PERMIT/SERVICES <br /> Teichert Aggregates <br /> P.O. Box 15002 <br /> Sacramento, CA 95851 <br /> j-i —L INCOMPLETE REPOR?'OF-YTVAdTE DISCHARGE, TEICHERTAGGREGATES TRACY <br /> ROCK PLANT, SAN JOA QUIN COUNTY <br /> I have reviewed the additional information for the Report of Waste Discharge (RWD) for the <br /> subject facility, which we received on 18 July 2002. The information provided was generally <br /> responsive to our request; however, the following comments regarding the water balance must be <br /> addressed before we can consider the RWD complete. <br /> I. Except for process wastewater flows, the water balance does not indicate the data values used <br /> or the sources of the data. The water balance must be supported by the following data and <br /> references to the sources of the data: <br /> a) Average annual precipitation and monthly distribution; <br /> b) 100-year total annual precipitation and monthly distribution; <br /> € c) Total runoff catchment area; <br /> d) Average annual pond evaporation rate and monthly distribution; <br /> e) Evaporation surface area; <br /> f) Base elevaiion_oT�each�pond; � � _ y _ _ _ <br /> g) Depth at two feet of freeboard for each pond (initial conditions); and <br /> h) Long-term sustainable percolation rates (if used). <br /> 2. The spreadsheet must clearly show how the input data were used to arrive at the tabulated <br /> water balance, including calculations and unit conversions. <br /> 3. The water balance indicates that the pond water surface will rise 15 feet during the 100-year <br /> return event, but whether this condition would create freeboard problems is unclear. Without <br /> further justification, it appears that the revised Waste Discharge Requirements (WDRs) <br /> ishould require that there be at least 17 feet of freeboard prior to the onset of any rainy season <br /> ' California Environmental Protection Agency <br /> 0a Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://Www.swrcb,ca.gov/rwgcb5 <br />