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'R ... GHEOMaM H. IZAA.33 CIVIL ENGINEER TRIXIIHONB 478-7797,8722 SAN PASQUAR. WAY, STMKTON, CALIFORNIA "210 The disposal site is in an area of Columbia loam soils which are underlain with various silts and sands deposited by the SanJoaquin River in the past. No test borings have been made. The disposal area ground water table is controlled by the height of the water in the River. This varies From about 3 feet above sea level (normal summer) .f.n about io qr ZG gerf, above sea level in an extremely wet winter. Since the bottom of the hole is about at sea level, about 3 feet' of ground water is present in the hole during the summer months. This will increase in depth during periods of high flow in the River. No drainage control is attempted since the flucuation of the water table due to the rise and fall of the river is the major factor and this does not interfere with the operation of the disposal site. No attempts have been made to monitor or control leachate since the waste materials being disposed of are inert materials, for the most part. Since the ground water level is reflected or is apparent in the existing hole, no monitoring wells are in use and.n3.-monitoring program is being carried on. The disposal site is and. will be used.for'Farming purposes, b As portions of the hole -have een.filledt these areas have been leveled in with the adjoining -field and planted to grain or alfalfa. Upon completion of the filling of the disposal site, -it is intended to re'leveil the site and the survounding fields into a single large field of about 70 acres which will then be formed as a unit. The operation'of-and control of the Disposal Site are entirely in the control of George B. Raab, Civil Engineer.. Copies: ofw:, Mt- perrftitstfiat I have in 'my files have.bgen furnished you. The. surrou . hding--areas are zoned and are used for agricultural purposes* Yours Trull(, 000040