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I <br /> II M1 <br /> 1 <br /> All wells have indicated relative high total dissoly__ed';<:solids 1 <br />' with the latest test results taken !; November 20, 1990, as <br /> follows : <br /> Total Dissolved <br /> Sodium (mg/1) Chloride (mg/1) Solids (mg/1) ,[[ <br /> 4 MW #6 91 6001' 1180 <br /> MW #7 70 156 :1 799 <br /> MW #8 67 345 ''J 1075 <br /> Regional groundwater gradient is to the northwest. See <br /> Plate 2 . <br /> PROPOSED DRILLING: <br /> i <br /> This proposal is to drill one (1) 2" monitor well, MW-12. <br /> The well will be drilled using hollow-stem augars. Total <br /> depth of well will be 100+ feet. Gro�undwate"r , .,in the area <br /> of the well is approximately 75 feet deep. Solid wall E <br /> schedule 40 PV G, F-480 pipe will be installed from 0-55 ' feet ` <br /> deep and 0.02 slotted schedule 40 class F-480 pipe from <br /> 55-100 ' . Concrete grout will be installed from 0 to 50 ' , <br /> t bentonite seal from 50 ' to 53 ' , #3 Monterey sand from 53 ' to <br /> 1001 . Well diameter will be 2" . See Plate 3 for well <br /> construction detail. <br /> i <br /> Wells will be logged and samples taken for analysis at each <br /> 5-foot interval. Water samples will be taken after wells <br /> are developed. Chain of custody forms will be used for <br /> delivery of all samples at laboratory. Well will be <br /> developed using a submersible pump or bailer. Soil cuttings <br /> will be placed on visqueen and covered with visqueen. Purge <br /> water will be barreled. Water and ', soil will be contained <br /> until testing results are known an&I then sd spo_sed. -,accord- <br /> ingly. No hydrocarbon contamination is expected at this <br /> site. <br /> LABORATORY ANALYSIS: <br /> Water samples and selected soil samples will be tested for <br /> Sodium, Potassium, Chlorides, Sulfates, Total Dissolved <br /> Solids, and pH. Laboratory test results will be distributed <br /> to San Joaquin County Environmental Health and California <br /> WQCD a's_ soon as they are available. <br /> START DATE: <br /> Proposed May 1, 1991. <br /> i <br /> I <br /> . s <br />