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SEP-27-1999 14 25 JOYCE ENGINEERING INC. 1 336 323'0093 P.03i04 _ <br /> <br />finvironmentat Service Campaaies and Consultaats <br />October 6, 1995 <br />Page ? <br />Pieas~ be advised that ,shag:tost~ ger~etally.underesti~nate-kydranlic conductivity, Therefore, <br />it is rccommcndcd that soiUseditneat~.sm~nptes~ be eollecte~, from the saturated zone Crom the most <br />traasnoissive layer is which t}u•weits ase~scrcened and that these s~nples.bG aaalyzed for grain size <br />distn"bution. Hydraulic condueti~!ity usay;be.calcul~ted froth the~grain size distribution data using as <br />appropriate method (e.g., Hazari {1911 March and Denny (196b) or Sherard, Duaningan and Talbot <br />{1984}]. The slug test values should ,then be compared to .the grain size analysis hydraulic <br />conductiviry values as well as tapublist~ed~ lrydraulie conductivity values for the specific soiUsediment <br />tSpe.:~dditioeally, to dctcrmiilo the variability in hydraulic conductivir; at a situ, slug ?gists she~ald <br />be performed in monitoring welts located in sttata likely to ex$ibit diffcrina llydrogeologia progerzia3. <br />(The DEM will cvtrently reimburse up to 51;500.00 fot implcmeutation_ of :di necessary slug tests at <br />a site.) For purposrs of modclir~g groundwatu flaw, thr greatest hydraulic canducdvity ~.~alues <br />should then be used to ensure conservative model output. ~ • <br />Y would Idce to taloe tiius~ opportunity to'stress that the~DFM will aot reimburse for slug tests <br />or aay other aquifer tests that are~pccformed "improperly. ~Ifi you hsvr an}~ questiosas or`would like <br />further information concer~ingalug~teats; gkase contact Rut& Strauss at (914).'I33-1330. ~~ <br />Siaccrcly, <br />Arthur Moubcsty, P.E. <br />Chief Groundwater Scotian <br />CC: Regional OtTGe Groundwater $uperviSOTS <br />$u1Tie $05hOfF <br />BiU R.eld <br />GCQT~C Matthi3 <br />Rliti12 Strauss ~ <br />