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i ; <br /> would damages the dispersing grid in the carbon scrub. The hot air <br /> is ' pushed ilkoiugh the carbon and then enters the "Cyclo-Purge" <br /> condensate tank, ooaide ilAg the vapor stream into water and <br /> s i n � � r a r* , i t <br /> ga.aolihi. The Vapor. stream is then retukhia to' the heater to <br /> - rehpik the stream to 210bF"prior`-to reentry into the carbon scrub <br /> to '66nt'frWoothe,stripping of v latile organics ah&�water from the <br /> r* > :4 u�'t �' Axa �..�,hA'1f r ✓.xs7t.,psu <br /> csrbon� o�c4omplete �£he 1"osedoop` systen . Reiwtian-Conies <br /> unt:L,,l` no more liquid is produced from Rthb co;iaenshte Mink. <br /> Ni£rogen is used to purge the system of oxygen to insure against <br /> explosion. This technique" was successful in r"owing <br /> approx'im"�ately 4ti 56% o the absorbed hydrocarbons and water vapor <br /> fZ4m;�t Ei �So` V%8, e, <br /> cR <br /> JUNE 5, 1991 <br /> Wit w tIXe 4 IImited success of ref uvenatin the_ carbon with the <br /> Cyclo,, Pue W it was decided to pur&a'se two enofe carbon scrubs- <br /> 110 gallon,,units,,Idependent upon carbon density, approximately 450 <br /> Rou= These carbons arrived at the site on June <br /> s 5, 1991. The "Cyclo Purge" was removed from the vapor recovery <br /> system and in its place 55 gallon moisture drop outs drums were <br /> placed infront of and behind the pumps (2- DR 606 Rotron Blowers) <br /> { that were placed in parallel.n �t -day tae;6- 4,5�ga°llonow�, oerbonA^ <br /> b arrxb t-^f.S > sxv.�sc,� -� irr� " KA, ' o-nx. sfa ,?r:F:. s <br /> s -r® seftmto` �►kima far red tik ystem has <br /> .� _ ,_ <br /> t ':3 ll�i.ng��vapiars from P` Ws, , -13.�ad15;_ <br /> bL� ��s f Qm t. a"fin"riia ;bri; p e P.0 tsuto, <br /> h u r eve�y � ` ntt 'esZ4ohm r lasted; for <br /> a� mrd, pari spwap�or 3S S T operatiM t. . It was <br /> etermined that the condesate (water drop out d"rhil-f -ere causing <br /> x` an increase in the vacuum and overheating the pumps. The pumps <br /> were then placed in series and the vacuum recovery restarted <br /> sr exhausting into the two 110 gallon carbon scrubs that were in <br /> N <br /> series. <br /> JUNE 7, 1991 <br /> Onsite analysis (using a "Photovac" 10850 GC-PID chromatograph) <br /> showed that no vapors were being produced from 17 "Qiilyi-'ainor <br /> a vca c^�w t x Xr <br /> j e*Pot F"I o�n�s►�"�m�atr�z��� i orwel�ls�rwl�re��aken�oif�,of` tha° vapor <br /> ��. `^ tom.. �x'�Y,.d� 4„' ;°rz�a, �- - -w <br /> Ttie "- x ct�i:or� s r e opet ►t'edyuntil yJune 1�4, 19.91 when it, <br /> F O � � e "#a�' thrb ►qh�°f �tb ,� eaand .110 4ii4k, <br /> cant tater b���(�15� � �� yyea During this time frame <br /> the "Cyclo Purge"_was used on occasafons to rejuvenate the lust <br /> carbon without shutting down the recovery system. zots46h' this <br /> res�Mrefflffl' <br /> y�Y ea�C i �thet: �y tem 'atet appropriately and <br /> page 10 <br /> I <br />