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i <br /> HirA i TEch ENTERPRISES <br /> metabolism in the human body. Considering all these factors, and since the established PEL(TWA) <br /> for acetone on a mass basis is roughly 21.,200 times greater than the level found to have been present <br /> in the Miller's septic tank, I was not too alarmed about the hazard level that this material posed to the <br /> water table. Not so Mr. Infurna. He emphasised the point that even 1 Pg/1 should set off all kinds <br /> of alarms. <br /> I still believe that somewhere there must be a permissible concentration level standard for acetone—as F <br /> well as for every other chemical —a concentration level that in a septic tank has been determined to be <br /> non-hazardous. It is this sort of a hard number for all the chemicals that EPA Procedure 8260B can <br /> quantify that I am seeking, and will hopefully find. <br /> Thank you for your help in this matter. <br /> Sincerely, <br /> Edward W. Finucane,PE, QEP, CSP,CIH <br /> EWF:gwf <br /> xc: Alan Biedermann, R. E. H. S. <br /> San Joaquin County Environmental Health Department <br /> Mike Infurna, Senior R. E. H. S. <br /> Environmental Health Department <br /> F <br /> E <br /> t <br /> 2 <br />