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FROM : Cl1RWOCE 0 TEL: 916 255 3015 #1 7. 1998 11:08 RM P 1 <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> Peter M.Rooney Sacramento Main Orden Ed J.&baabal <br /> srmao'la Intemet Addan: http:/Aw ,gwrcb.mlpv/y gcbf&h ,htMI C/wtr <br /> shrh ffffa/ 3443 Routier Rood,guile A,6aaanomto,California 95!27.300} <br /> NONCOM Phone(916)255.3000•FAX(916)255-3015 <br /> Mr.Bing Kirk RECEIVED7 October 1998 <br /> Atherton Kirk Development Company (+i- I () ( 1993 <br /> 4502 Georgetown Place, Suite 203 ENVIRONMENTAL HEALTH <br /> Stockton,CA 95207 PERNAIT/SERVICES <br /> SPRECKELS MANTECA,SANJOAQUIN COUNTY(Case No. 860) <br /> 1 have reviewed the 14 September 1998 assessment report and the 25 September 1998 addendum letter <br /> from Kleinfelder for the re-use of spent lime at the former Spreckels facility. The report presents <br /> analytical results for spent lime and mixtures of spent lime,native soil and imported soil. The results <br /> characterize approximately 350,000 cubic yards of spent lime currently in ponds at the site. The soil <br /> mixtures incorporate 25 percent lime with 50 percent native soil and 25 percent tare soil.The soil <br /> mixture is intended for engineered fill in the southern portion of the property. <br /> As shown in the report and addendum,the results from the deionized water Waste Extraction Test(DI- <br /> WET)on the soil-lime mixture are generally below local background water quality. Nitrate in the <br /> mixture is one constituent that clearly exceeds average background water quality. Although DI-WET <br /> results also exceed certain water quality goals used to protected beneficial uses,these goals are also <br /> exceeded in background water quality. <br /> Kleinfelder reports several properties of the soil-lime engineered fill will mitigate any potential impacts <br /> to water quality. Infiltration through the engineered fill will be minimized because the in-place <br /> permeability of the fill is expected to be near 10.5 cm/sec. The lowest portions of the fill will be 7 to 15 <br /> feet above the water table.Large portions of the fill area will be covered with building, streets and paved <br /> parking areas. Based on these facts and the analytical results,Kleinfelder concludes that the lime soil <br /> mixture is not a threat to water quality and therefore, should not be considered a designated waste. <br /> Based on the information and conclusions presented by Kleinfelder,I concur that the proposed use of <br /> spent lime in the engineered fill complies with the facility's waste discharge requirements. If you have <br /> any questions,please call meat(916)255.3131. - <br /> Poet-It'"brand tax transmittal memo 7671 .0 pep...TO <br /> 1 <br /> Ont d From ST E 604 UM <br /> STEVE E. ROSENBAUM ,c° <br /> Associate Engineering Geologist •pt °n•• <br /> SER ..e � 4(p8- J .. ((o a5S- It <br /> cc: Mr.Ron Rowe, San Joaquin County Public Health Services, Stockton <br /> Mr. Tony Martin, Kleinfelder Inc.,Stockton <br /> CaWornla Environmental Protection Agency <br /> Rrgr/adPgprr <br />