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v - M_ __ <br /> �I J' �• <br /> Seven more monitor wells (MW-4, MW-5, MY-6, Mw-7, MW-8, MW-9, and <br /> MW-10) were installed off and on site with procedures and sampling <br /> results provided in Assessment Report #2, dated February 23, 1993). <br /> The recommendations of this second report are as follows; <br /> 1• Perform an aquifer test. <br /> 2. Obtain the necessary permits and authorization to <br /> instetll a ground water recovery system for remediation <br /> purposes and to stop the migration of the contaminant. <br /> 3• Conduct a feasibility study for the disposal of <br /> contaminated ground water generated by cle,snu? <br /> operations. <br /> 4• Obtain permission to dispose of treated ground water <br /> through the City of Stockton sewer (POTW). Treated <br /> water must satisfy the requirements set forth by the <br /> City of Stockton Department of Municipals <br /> Utilities, <br /> 5• Continue quarterly ground water monitoring until water <br /> concentrations meet action levels set for this site. <br /> 6. Determine feasibility and locations of additional ground <br /> water moni=oring wells east of monitor well MW-8. <br /> Since submitting report #2, WEGE has performed the May <br /> quarterly ground water sampling and collected data for the Bouwer0 <br /> and Rice Slug Test calculations. The sampling results and <br /> calculations are included in this report. In addition, PHS- rte <br /> has reviewed our February 22, 1990 report and agrees that an <br /> aquifer test along with the information gathered from previous <br /> investigations should provide sufficient data to design a <br /> remediation system A plan should be submitted by August 20, 1990. <br /> Also,.,y43 r es <�#7o4t7 be <br /> ca� n#tQ� tal <br /> rphgFu to saisfyecacJosvir�„ <br /> y» ,� 4 <br /> 04} ty�,.Ft:bl.icfaZthervi.ces,} 7 viranmenta�`1`Mealth Diveon <br /> H0)�'8po�eia ': Fpd1f'cy} see'A e�df�� A <br /> L•. erm3 .. ( PP ) <br /> 2.0 GROUND WATER <br /> 2.1 REGIONAL AND LOCAL GROUND WATER FLOW <br /> Ground water flow direction in this region is to the west towards <br /> south Stockton from the foothills of the Sierra Nevada Mountain <br /> Ranges, and towards the east from the Sacramento-San Joaquin Delta. <br /> At present, encroachment of saline waters from the Delta is <br /> diminishing ground water quality in the Stockton area. <br /> 7 <br />