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i <br /> Wellhead Vertical Control Survey <br /> 102 S. Wilson Way <br /> Stockton, CA <br /> Station 1 location = 10 feet due north of well MW-4 <br /> Station 1 elevation = E, = 18 ft MSL, from Stockton Quad Map <br /> Height of Instrument at station 1 = Hti = 5. 00 feet. <br /> Hr. = crosshair reading of rod (in feet) placed on survey mark on <br /> wellhead <br /> Wellhead Elevation = Ewh = (El + HiO - Hr <br /> I <br /> Well ID Rod Reading Wellhead Elevation <br /> I � <br /> MW-4 4 . 79 18.21 <br /> MW-3 4 . 95 18. 05 <br /> MW-7 4 . 72 18.28 <br /> MW-2 5. 41 17 .59 <br /> MW-6 4 . 70 18 . 30 <br /> MW-1 5 . 08 17.92 <br /> MW-5 4 . 61. 18. 39 <br /> Station 2 location = 20 feet north of MW-1 <br /> Station 2 elevation (E2) obtained from resurveying of MW1 and MW-6, <br /> as follows: <br /> E2 = (EMw-1 + Hr) - Hi2 (EMw-6 + Hr) - H12 <br /> E2 = (1.7 . 92 + 5 62) - 5 11 = (18 . 30 + 5 . 24) - 5. 11 <br /> Ez = 18 . 43 ft MSL <br /> For final shot of well MW-8 E _ E + H - H <br /> ! wl ( Z t2) r <br /> Well ID Rod Reading Wellhead Elevation <br /> MW-8 5 . 93 17. 61 <br /> survey performed with Lietz C3E Autolevel with Philadelphia Rod <br /> under supervision of Nora Katacka, R.C.E. 038322 . <br />