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J . H OEINFELDER & ASSOCI,xTES <br /> GEOTECHNICAL&ENVIRONMENTAL CONSULTANTS•MATERIALS TESTING <br /> LAND & WATER RESOURCES <br /> 1901 OLYMPIC BOULEVARD, SUITE 300 <br /> WALNUT CREEK,CA 94596-5063 <br /> (415)938-5610 <br /> October 21, 1986 <br /> a (gnaw <br /> Ms. Laurie Cotulla R.S. <br /> San Joaquin Local Health District ©�;� 2 2 1Y8b <br /> 1601 East Hazelton Ave. <br /> P.O. Box 2009 ENVIROMENTAL Hi=ALTH <br /> Stockton, CA 95201 FERIMIT/SERVICES <br /> Dear Ms. Cotulla: <br /> As per our October 16 phone conversation, J. H. Kleinfelder will be <br /> installing 18 monitoring wells (12 shallow, 6 intermediate) on Rough <br /> and Ready Island. Drilling is scheduled to begin the week of November <br /> 3rd. <br /> Along with the well permit application and fee I have enclosed the <br /> following plates for your review: <br /> Shallow Well Construction Diagram -- Plate 10 <br /> Intermediate Well Construction Diagram -- Plate 11 <br /> Verification Study Land Area <br /> Location Map -- Plate 2 <br /> Well Locations <br /> Landfill Area -- Plate 4 <br /> Fire Fighting Area -- Plate 6 <br /> Battery Acid Area -- Plate 7 <br /> GSA Damaged Container Area -- Plate 8 <br /> The monitoring wells will be constructed using 2" I.D. stainless steel <br /> casing with 10' screen sections. The shallow wells are expected to be <br /> 15--20' deep. The depth of the intermediate wells will be dependant <br /> upon lithology but are expected to range from 50'--601 . <br /> The wells locations on the enclosed plates are subject to change. We <br /> are currently analyzing water level and sampling data from 80--1" DIA <br /> piezometers installed in August--September. Based on these analyses we <br /> will select final locations for the monitoring wells with respect to <br /> potential source areas and groundwater flow direction. <br /> OTHER OFFICES:Sunnyvale•San Ramon•Stockton•Sacramento•Fresno 6 Fairfield•Rohnert Park•Merced•Los Angeles•Reno•Las Vegas•St.George,Utah NE <br />