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i <br /> t <br /> velocity sediments found at MW2 as compared to the sediments at <br /> MW1 as calculated from the Slug Test presented in Update Status <br /> Report 5. Historically this site has shown flow directions to the <br /> a ; southeast and east., <br /> Rigur'%�18 �{5724r9l) represents depth to ground water during vapor <br /> , is and� astworgete° ground wader, contours represented <br /> oTi s,_ level <br /> stiei3` 1"roes reliAisent the actual physical ground <br /> # water level without corrections for the lower pressure occurring <br /> at the water level due to vapor extraction. Th6 4' 4fdavy 'tines <br /> ria] -dsent,t that effectivaf grs ihdkwater lev91-- (potenti.omentric head) . <br /> t. The dept)i to water measurements are correct'ad for the vacuum <br /> ! (presure drop) at that well from vacuum reading measured on June <br /> 27, 1991, see Figure 6E. To obtain the potentiometric head for <br /> each well the vacuum reading (millimeters of water) is converted <br /> into feet by the following: <br /> g <br /> 25.4ch x 1 vAcuuxY3�,. <br /> mm/in 2 inches/foot x vacuum reading 2' <br /> Yy4 <br /> t` i� �� <br /> jTb s aping risen n Bub actedyd'r a the <br /> �� � h �Qr�,, ac�ual� , deph, 't0 <br /> G a c WAV7%1f$ b' t ,� t <br /> pw 9B�Yi 8 F7 ad' i. � 10t s�h3 sric, <br /> +, ae sdie;lpre� ure;` Ff �rh'ic the <br /> The overall ground water elevation beneath this site has showed a <br /> decline since the January, 1990 gauging. As of March 29, 1991 the <br /> ground water has decreased in elevation as much as 12.54 feet at <br /> MW2 to 9.2 feet at MW4, see Table 1. <br /> Y <br /> CHEMICAL` RESULTS-GROUND WATER SAMPLES <br /> Ground water samples were obtained from all six on site monitor <br /> wellson March 29 1993 <br /> r (MW-1,� MW-2, MW-3, MW-4, MW5, and Z ). <br /> a or� dah, <br /> 3 <br /> � r, <br /> ,,,�ior �I.��s�mP�l'ig� All <br /> x� water produced by e r eve opment is currently being stored on <br /> site in 55 gallon drums, Prior to obtaining the ground water <br /> 4 samples each well was purged using a hand bailer, until the <br /> temperature, pH, and conductivity stabilized, approximately 2-3 <br /> t gallons of water, see Appendix G This <br /> purged water is presently <br /> being stored on site in 17E 55 gallon drums. Previously stored <br /> purged ground water from the initial development of the wells and <br /> the quarterly samplings was discharged to the sanitary sewer clean <br /> out after obtaining permission from the Municipal Utilities Dept. <br /> for the City of Stockton (approximately 800 gallons) , see Appendix <br /> page 3 <br /> r <br />