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111t-L-1 I ,_ , ��- <br />09i29; 96 01: j <br />41qmo�o� Minnesota Pollution Control Agency <br />qW <br />September 28, 1988 <br />Mr. Joe lallansch <br />Veshington Scientific Indu*trie4, Inc. <br />2605 Vast Vsysata Loulevard <br />P.o. fox 34U <br />Long Lake, Minnesota $�3S6 <br />Dear Mr. Fallsnscht <br />REt Remedial Action Plan <br />Lonr the Lakes aMinnesotaSc(pjIi�cp)Industriea, Inc. (VSI) <br />facility Locatedg <br />The Minnesota Pollution Control Agency (MPCThetRAP the above your <br />referenced document on September 2, 1964. sWSIubmitted <br />ed details <br />behalf by Delta Invironaantal Consultants, Inc.he(Delta). The <br />the findings°fthe <br />contsslinatedInvestigations <br />vtedate <br />bene•chaakes yvur faoilitydationa for <br />remedistion of the <br />The MPCA staff have completed their review of the YSI RAP and have the <br />following comoentsi <br />1. As findings of the investigation indicate that there is ground water <br />contamination down to a depth of 24 last, the propo4od interception <br />trench should be installed to a depth of at least 24 feet, not 18 <br />feet as was specified in the Y61 RAP. Tn a septomber A, 1980, <br />telephone conversation with Joseph Julik of my staff, David Ronnei of <br />Delta stated that titers may be practical problems, such as caving, <br />theyciated would asks everylliattemPtttonch installathestrench•tooanei deptthioft24t <br />fast. <br />Kr. Ronnei also stated that if the use of piles were necessary in <br />order to allow the trench to be installed to 24 feet, the coats <br />illotovaldepthaofb24Ufeeptralternative methodstfor`h will capturingtbe contaminald my ed <br />ground water should be proposed. <br />Phone:_— - <br />A20 Lafayette Rood, 8t. Paul. Minnesota "166 <br />r%glonel Otr!cet • Duluthlprein-drt)etro►t takplMarrrheUll ,spit+++ <br />Evual OPOM)""Alty IMP'oyw <br />