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FRO-! CURwoce • TEL: 916 255 3015 �T. 5. 1998 10:20 ars P 1 <br /> Post-W*bran i transmittal memo 7871 "I"so" <br /> reel <br /> taJPi <br /> Dept. '"0""" / 5,3131 <br /> 3Y .." <br /> 33 <br /> KLEINFELDER <br /> M plgiq,p mrntAnMpMp <br /> Filo No.20-3978-03,W41 <br /> September 25, 1998 <br /> Mr.Bing Kirk <br /> Atherton Kirk Development Company <br /> 4502 Georgetown Flue,Suite 203 <br /> Stockton,California 95207 <br /> RE: Addendum No. 1 <br /> Revised Report <br /> Pre-Removal Assessment of the Spent Lima Rod <br /> Closure Plan for the Lime Ponds <br /> Former Spreckels Sugar No.2 <br /> 18800 South Spreckels Road <br /> Manteca,Calfforala <br /> (WDRorder.# 97-204) <br /> Dear Mr.Kirk, <br /> On the afternoon of September 24, 1998,1 received A telephone call from Mr. Steve Rosenbaum <br /> of the Central Valley Regional Water Quality Control Board, Mr. Rosenbaum had roviewed our <br /> September 4, 1998 report titled 'Raviaod Report, Pro-Romoval Assessment of the Spent Lime <br /> and Closure Plan for the Lime Ponds.....". Whfle we slated in the report that groundwater <br /> infiltration through the waste would be approximately zero, Mr. Rosenbaum requested <br /> clarification regarding what potential degradation of groundwater quality may occur if the <br /> soluble portion of the native soil/spent limehare dirt mix were to leach down to groundwater. _ T <br /> This letter addresses that concern. <br /> �,j(PLANpq' ON <br /> In the event that water was to penetrate the asphalt or building structures that will overlay the <br /> compacted native soiVspent fime/tare dirt mix, the water may come into contact with the <br /> proposed soil mix. That soil mix when compacted to 90% would have a permeability of <br /> approximately 2.7 x 107' to 6.7 x 10-" cm/sec. Therefore,percolation through the soil would be <br /> minimal. However, if water were to percolate through the proposed soil mix it may migrate to <br /> groundwator. The following table lists average soluble concentrations (as estimated using the <br /> DI-WET test) of various analytes in the soil mix and background concentrations of these <br /> constituents in wells hydrologically upgradienl from the time ponds. <br /> Peso I of 4 <br /> 20-3978.03.w41 120186794 September 25,1998 <br /> copyright 1996.Klelnfelder,1110. <br /> KLONrELOLk t8:5 tasl MYIlr Slrcl4.5prkWn.t'x 4.f:07.4 r44 1211714Aa•17•IF 1:'t14144e IIL2l las <br /> Z00® NOL6an8d,SNOD SIbYSN1lADY � 920zB9860b 3ryd 1'0)90 la:l 88/Z0/Oi <br />