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r . TABi 1A <br /> HYDRClPTJ1�T� GROMV.ATER SAMPLE<AIUALY ESss ss <br /> v.0'dage east mamxu,5ta toA &ap Joaguiu CoFwty:i: <br /> ....... s ........eit�i'S9eu�µgff <br /> EPA Method EPA <br /> 5030/8015-m EPA Method 602 3510/8015-m <br /> Sample Date Total <br /> I.D. Sampled TPH-g Benzene Toluene Ethylbenzene Xylenes TRPH-d <br /> HP-1 04/08/94 86 0.4 ND ND 0.6 ND <br /> HP-2 04/08/94 ND 0.3 0.5 ND 0.4 ND <br /> HP-3 04/08/94 360 160 2.5 0.3 4.4 ND <br /> HP-7 07/03/95 ND ND ND ND ND NA <br /> HP-8 07/03/95 ND ND ND ND ND NA <br /> 11P-9 07/03/95 196 124 1 0.3 5 NA <br /> HP-10 07/03/95 ND ND ND ND ND NA <br /> Reporting 500µg/2 <br /> Limits 50µg12 0.3µg12 <br /> ND Not detected above the reporting limit of the laboratory test. <br /> NA Not analyzed for TRPH-d <br /> _._Travel blank was nondetectable for all analytes. <br /> .; <br /> 3.5 Monitoring Well Completion <br /> Ground water was encountered during the drilling of Hydropunch'a' borings HP-7 and HP-8 at <br /> an average depth of approximately 17 feet bsg. HP-7 and HP-8 were completed as MW-7 and <br /> MW-8 following on-site receipt of favorable water-sampling analytical results indicating <br /> nondetectable gasoline analytes. Each was completed with two-inch-diameter, Schedule 40 PVC <br /> well casing with 0.020-inch factory slots was placed from 30 to 10 feet in each well. A <br /> threaded end cap was installed on each bottom. Two-inch-diameter, blank, Schedule 40 PVC <br /> casing was extended from the top of the screen at 10 feet bsg to a few inches below surface <br /> grade (bsg). <br /> Number 3 Monterey sand was used as filter pack and was placed to extend from the bottom of <br /> the wells to approximately two feet above the screened interval in the annular space of each well <br /> (30 to 8 feet bsg). The bentonite seals at 8 to 6 feet bsg were hydrated with five gallons of <br /> potable water. Portland cement was pumped into the remaining annular space above the <br /> bentonite seals to extend from 71/2 feet to 1 foot bsg in each well. Locking caps were placed <br /> on top of the well casings inside 8-inch, water-tight street boxes cemented into place at the <br /> surface. <br /> W.W. Irwin, Inc. <br /> Project No. 33016.05& .06 <br /> "1 August 1995 8 <br />