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California *ional Water Quality Control Board <br /> Central Valley Region <br /> Winston H.Hickox Cray Davis <br /> ryfor Sacramento Main Office <br /> SecreraGocrrnnr <br /> Secronryfor Internet Address:Envihttp://a gee swrch.ca.guri-nrge65 <br /> Protection 3443 Routier Road,Suite A,Sacramento,Ca I,Jbil is 95827-3003 <br /> Phone(91o)255-3000•FAX(91 G)255-3015 <br /> 17 May 2001 <br /> Brian Grattidge <br /> State Clearinghouse <br /> 1400 Tenth Street <br /> Sacramento, CA 95814 <br /> CITY OF LATHROP WATER, WASTEWATER,AND RECYCLED WATER MASTER PLAN <br /> ENVIRONMENTAL IMPACT REPORT, SCH# 1998082050, SAN JOA QUIN COUNTY <br /> I have reviewed the Environmental Impact Report SCH# 1998082050, distributed by the State <br /> Clearinghouse in correspondence dated 2 April 2001. The EIR describes goals and policies of the City <br /> of Lathrop for water, wastewater, and recycled wastewater services. I have the following comments on <br /> the document. <br /> • To date,the City of Lathrop has conceptually presented only land application scenarios for <br /> wastewater treatment and disposal. Many of the proposed activities are reliant on surface water <br /> discharges which have not been conceptually discussed with staff. Therefore the acceptability of <br /> scenarios is uncertain until it is further discussed. <br /> • Many of the assumptions in the EIR are based on the Mountain House Waste Discharge- <br /> Requirements. It should be recognized that the Regional Board's policies evolve over time. <br /> Mountain House WDRs were prepared in 1998; significant policy changes have been developed <br /> since then. <br /> • Table 2-1 presents many impacts and,based on assumptions that cannot be evaluated because of <br /> limited data, assumes no mitigation measures are required. For example, Table 2-1,Item 4.2-10 <br /> states because the concentration of total dissolved solids in the wastewater would be less than the <br /> Maximum Contaminant Level,no mitigation measure is required. Simplifications such as that are <br /> unlikely to be true in all cases and require detailed evaluation. <br /> • Insufficient information is available at this time to evaluate any of the statements in Table 2-1, <br /> Section 4.2. <br /> • Insufficient information is available at this time to evaluate any of the statements in Table 2-1, <br /> Section 4.3. <br /> • The Master Plan presents a phased construction of additional facilities. It should be recognized that <br /> it is impossible to predict how the significance of issues may change over that period. <br /> California Environmental Protection Aaency <br /> %5 Recycled Paper <br />