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f <br /> Geo(ogical?ecFinics Inc. "r Page 3 <br /> Former Moresco Property <br /> Project No. 251.3 <br /> April 8, 1998 <br /> F <br /> MTBE, with an average of 28 gallons. Not knowing the source of this fuel and not having a <br /> representative analytical view of its distribution in the subsurface, we believe this is a <br /> conservative interpretation. <br /> The table below also shows the estimated volumes of the other chemicals requested in the March <br /> 9 1998 letter, as calculated in this manner. <br /> Sources for the information presented below are: <br /> • GTI's mass estimate calculation spread sheet <br /> • MSDS references pages <br /> • The Merck Index <br /> • RC Handbook of Chemistry and Physics <br /> • Introduction of Geochemistry by Krauskopf` <br /> Chemical/ Range Range Ave. .:Solubility Vapor Press <br /> Compound % Volume Volume (mgR,) (mm,xG,*@ <br /> r Name (gal) (gal) 25°C) <br /> TPH-G 95-100 167-205 185 - 300-700 <br /> MTBE 10-20 17-41 29 43,000 250* <br /> j Benzene 1-5 2-106 1,780 95* <br /> Toluene 3-10 5-20 r 13 - - <br /> Ethyl Benzene 1-3 2-10 6 - - <br /> T. Xylene 1-3-10 5-20 13 - - <br /> III SVES Shut Down <br /> As presented in the February 6, 1998 Remedial Action Report, the SVES was shutdown on <br /> January 14, 1998. <br /> J Based on the current knowledge of the condition of the contaminants at this site and the fact the <br /> n <br /> partial mitigation of these chemicals has been completed and the level_of risk reduced, it is <br /> f recommended that this site be considered for closure. <br /> Respectfully Submitted, <br /> GeofogicafTechnics Inc. <br /> Raynold I. Kablanow lI, Ph. D. <br /> RG/CHG/REA/CEM <br /> F cc: Michael McGranahan <br /> g:5jo6s1mcgrhn 2511cor 9&12516 cor12516 phs-ehd 980408ck-doc <br /> r .. <br /> 4 <br /> d <br /> i� <br />