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CLEARWAT E� . �Jy { ALF , <br /> +-Et yf <br /> x G R, O ,U,' P, 1 -N " C.5, <br /> Ms: Linda A. Turkatte,�Senior R.E.H.S. : Septernber:25, 1995 <br /> San Joaquin County Public Health Services <br /> Environmental Health .Department ' <br /> P. O. Box 388 f <br /> Stockton; CA 95201-0388 <br /> Re:'.Ekholm Property, 1702 Jackson Street, Escalon . <br /> 'Q ear Ms.`-Turkatte,` <br /> x _ <br /> I <br /> wanted ,to take',a -moment. this afternoon to share a. few thoughts with you <br /> regarding the.referenced file.'-As follows: <br /> • We have had numerous-jdiscussions' regarding the, three. original monitoring <br /> h wells installed 'by-RESNA'prior to ourinvolvement:' Our-contention has been } <br /> that the incorporation of these wells into the'operating soil vapor extraction <br /> system, would diminish the-effectiveness,of said system, due to the fact`that these <br /> original wells, were not. completed in; an area .that',actually contained any <br /> documented concentrations of .contaminants: VW-2' and VW-3 were installed <br /> near contamination,: and.,VW-1 was installed far from ,any sample :point <br /> containing measurable concentrations of gasoline constituents: . Only VW-4 and <br /> .Vw-,5; installed by Clearwater, .were -constructed_-within ' soils containing <br /> contamination: <br /> You, asked that we 'include`the three original wells until such time, that it'.could <br /> be'shown that they.were,'not needed (your letter dated September. 28, 1994)" , We. ' <br /> tied the wells,to the system as you requested with the intention being that they <br /> ` would .remain.on-line until.sufficient information regarding their effectiveness - . <br /> could be collected.' Thepiping layout,was considered_temporary, and, did not <br /> include any fixed gatiges' dueto-th'e'unCertaint"y associatedTwith--the�usefizlr�ess v <br /> of the original extraction orar <br /> wells. While the elbows in the tempy piping layout <br /> reduced the airflow;the system was capable of producing, the.system was still able <br /> to .produce, a�.wolume of_.-air sufficient .for the purpose <br /> .of determining .the � <br /> effectiveness of the, original. three wells: Additional ,expense .that would..have ; <br /> been incurred by making the layout,perrrianent was considered.unnecessary, as it <br /> was likely that the.piping=,would either be ultimately reconfigured with a larger <br /> blower. (as a larger blower would be'needed if the data showed the wells to be <br /> necessary),or dismantled-(if.data showed they were useless) <br /> .1125 Atlantic Avenue Suite 102. Alameda•Califon-da•94501 •,{510)337-8730 Fax(510)523-0984 , <br />