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16 April 2004 <br /> AGE-NC:P.roject No. 990637 . <br /> _ Page 2 of 2:. <br /> ;f <br /> filter pack,Bentonite pellets willbe hydrated using five allons-of water. The�bcntonite pellets will = <br /> be allowed-to,hydrate for a:minimum of one'.half hour rior to,grouting. <br /> Following hydration'of the.lientonite pellets;theremaini g annular space will-be filled to within one.- <br /> foot"of the ground surface with a cement grout. The gro t mixture will consist "f type LIU portland <br /> -fieat cement and not more'than 6 gallons of water per 9 =pound sack.of cement. The grout will be <br /> placed by-pumping through a tremmie pipe or the;hol w stem augers. A 3/4-inch PVC riser. will: <br /> connect the sparge point's to the distribution system and ozone generator.'A traffic-rated well box <br /> will be installed over each sparge welL A centralizer wi R be utilized.during the construction of the. <br /> proposed ozone well to assure"proper placement of the filter.pack and seal. <br /> Please contact our office-at (209) 46771.006 if you have any-Auesfions or comments. <br /> Sincerely, <br /> Advanced GeoEnvironmental, Inc. <br /> Brian W. Millman <br /> -Staff Geologist <br /> cc: Mr. Frederic Clark, City of Manteca . <br /> Mr. James Barton,Central Valley Regional Water Quality Control_Board <br /> Advanced GeoEnvi'onmental,Inc. <br />