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_ � _ <br /> _ f <br /> STEyWART'S REACM <br /> �. <br /> PHASEII REPORT <br /> PAGE: 3 <br /> factory perforated casing was steam-cleaned prior to insta!ling to 19 feet. The <br /> 0.02 loerforat Ions extended from 19 to 9 fest with g3 Lmter Sand from the <br /> s bottom to 6 feet. The grouting took place after Eleanor arrival to Inspect Its <br /> completion. The well box was cemented In and'a locking cap installed on the wet l <br /> w� casing before leaving the site. Water was standing in MW-3 at 10.4 feet. <br /> 6/3 Arrivedon-site to develop monitoringwells with Osterberg&Stewart's'Jet <br /> Pump. Start Ing with MW-2 a total of 110 gal Ions wars pumped by the time a <br /> clear water was attained and then 5 well volumes removed. While pumping water <br /> i x levels were taken at the remaining wells their water levels were,MW-3 was <br /> 9.925 feet to Of the <br /> MW 2 pumped 2:gpm land increased to 3.06 Spm as it developed <br /> (T.O.C.). <br /> ` MW-3's wafer level before pumping was 10.1 feat(T.O.C.)and the water when <br /> pumped was mucin dirtier than in MW-2. A total of 165 gallons were <br /> containerized by the i Ime a clear water was attained and 5 wel I von:ones removed.- <br /> Water levels were taken at the remaining wells while pumping MW-3 their <br /> levels areas follows, MW-2 was 9.7 feet and MW-I was found to be 11,3 feet <br /> (T.O.C.). MW-3 pumped at a faster rate of 2.75 gpm and Increased to 3.4 gpm. <br /> MW-1 pumped clearer water to begin with,however there was acantaminatlon <br /> r.:.r odor present In the water being pumped. After removing 55 gallons the water was <br /> almost clear but with the consistently faster pumping rate of 3.2 gpm it took only <br /> another 17 minutes to fill the second 55 gallon drum so Instead of stopping at the <br /> additional 5 well volumes tis entire drum was filled before sampll% While <br /> pumping MW-I the water levels In the remaining wel Is were measured their <br /> levels were as follows. MW-2 was measured to be 9.875 feet and MW-3 was <br /> found to be 10.0 feet <br /> Before leaving the site al l water levels in the wells ware checked,their levels <br /> were as follows, MW-I 11.375 feet,MW-2 9.875 feet,and MW-3 9.975 <br /> feet. <br /> 3.0 PROBLEM ASSESSMENT DISCUssiON CpHASE 1) <br /> 3,1 Subsurface oalegy <br /> 3.1.1 Stratigraphy <br /> -- . - -- -- General ly the upper strata In Tracy area Is characterized by CIO rich sediments <br /> that alternate with horizons of sand or slit. These coarser grained units typically <br /> j contain acloy matrix. Below 20 feet is a firm,brown,slityclay, From 2O up to <br /> 17 feet Is a brown,fine and medium grained sand that is water saturated loCV and <br />