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Cary Keaten ° 4 • 26 January 2004 <br /> b. Tables 7-1 and 7-2 use a different rainfall amount than Table 7-3. Please confirm the value <br /> with the Department of Water Resources and include in revised submittal. <br /> c. Please explain why wastewater is applied to land in months when precipitation exceeds <br /> evapotranspiration. This is in conflict with the Attachment 7 statement, "Irrigation will not <br /> be done during the wet season." <br /> d. Although no pond percolation is included in the water balance,please establish if a pond liner <br /> is planned. If yes, describe the material and thickness. <br /> e. Evaporation of water from a pond is less than the pan evaporation value. Please use a <br /> correction factor in your calculations. <br /> f. Application of wastewater should be adjusted to better conform to net evapotranspiration. For <br /> example in March, Net ET (0.7 in) is significantly less.than the Applied WW (6.7 in). This is <br /> in conflict with the statement, "No groundwater recharge is part of the design or operational <br /> practice," contained in Attachment 7 and the statement referenced in Item C above. <br /> g. Errors in the spreadsheet formulas may exist. For example, in March, the Net ET should be <br /> 0.57 in but the table presents 0.7 in. Please check the spreadsheet formulas or provide more <br /> information to allow a reviewer to follow the calculation. <br /> h. No information on the land application infiltration assumptions included in the water <br /> balances is presented. Infiltration of wastewater historically has been a problem for the City. <br /> 14. Attachment 6 states Pond No. 3 will not be lined; none of the offsite storage ponds appear to be <br /> lined either. In Attachment 7, Recycled Water Storage, a brief description of pond liner criteria is <br /> presented. The selection of a liner must be based on the need to protect groundwater quality. The <br /> discussion presented in Attachment 7 is inadequate because it does not address the depth to <br /> groundwater, groundwater quality, wastewater quality, and potential impact to groundwater <br /> quality. Please provide a discussion that addresses groundwater quality protection at each pond. <br /> The discussion must include measured groundwater quality, anticipated stored wastewater quality, <br /> and groundwater elevation. Staff's cursory evaluation indicates some ponds will be in direct <br /> contact with groundwater. If liners are proposed for wastewater storage ponds, explain how the <br /> liner will be protected from high groundwater conditions. If liners are not deemed necessary, <br /> explain how the wastewater storage is compliant with the State Water Resources Control Board's <br /> Resolution No. 68-16 (the Antidegradation Policy). The Antidegradation Policy is available at the <br /> State Board's web page at http://www.swrcb.ca.goy/Zlnsl2ols/woplans/res68-16.pdf <br /> 15. In the text just above Table 7-5, the statement, "The developers will be responsible for maintaining <br /> and operating the storage ponds within their development," seems to be in conflict with the <br /> statement on page 2, "The City will retain operation and maintenance of the sewer collection <br /> system and will operate and maintain the recycled water distribution system." All parties with an <br /> ownership interest in the wastewater treatment or distribution system shall submit a Form 200. <br /> 16. Figure 7-6 includes an area labeled, "Optional Disposal Storage." It is unclear what the purpose of <br /> that storage is. Please clarify the intended use. <br /> 17. In Attachment 7, application restrictions are listed but the means of compliance are not discussed. <br /> Please provide information on how the restrictions will be complied with. For example, the <br /> Vl=Joa-k-Nm 1 P.4ufflObwm .J.KgkVa pWVIT .Phar M..M 1..1 <br />