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• •,�4�� CALIFORNIA REC"'NAL WAS QUALITY CONTROL SOARn C LIFT <br /> CEN—MAL VALL LEGION � <br /> a ' 344; Aouua Road SuiM A <br /> Sla=c,CA. 959rd-3098 "^ <br /> Phc=(916)55-3000 , <br /> rX(916)SS-301] .0y i• w'�Gm+errc <br /> 18 July 1997 <br /> Revised 30 Az1.ggawt,1997 <br /> To Vl hc=i it May Conde= <br /> ANALYSIS REQXMED FOR OXYGT--NA =CO-40OUNDS USED .al CALIFORNIA <br /> GASOLLNE- EPA-N=OD 826a (824 and 8=0) <br /> At a June 1,0971 ate--tMc at ti-le Depar=eTrt of:-lealth SE-,novs in Berkey, he st tewi e " <br /> anaiydcai methods m e=Lor est2biishf=c analydcai=1 and additive stia� ,was <br /> informed that oxyg*late compounds,w==may cite a threat to c oundwate`, adip-- <br /> than MIBE,have been and are bung added to psoiaue. T"ne i,:st�nccudes, in order of <br /> analytical ide:rti acation: <br /> 1. Metinanoi <br /> ? Ethanol <br /> I Tertiary Butyi.?tmhol (ZEA) <br /> s lriBE <br /> 5. Di soprovyi ether(DT'-E) <br /> 6. Ethyl Teary Butyi Ether(ETM <br /> 7. Ter`uary A-myi Methyi B;-her MA-ME) <br /> The Est three are alcohols and tiie latter Lour are ethp--c moo=ds_ E-:±m=i Ins be=i used for <br /> seve,:al vears in C.aEd=dz. MTBE,as you know,las been used as an octane vab= -- add ve <br /> since the late 1970s and is now used at a b i#v--pemeniag-as an oxyae-ate in Qasoime. -Now <br /> we have learned that;L�has been adored to CaIIib=a fuels, 5-�5_ DiPE Tial been <br /> used on the East Coast,but rely has bei foo=d in Sautht CaHf=-is Fc=d wat--{May <br /> 1997) and San joaq=Cca=L7-(August I997� TBA bas be=t and in grm=d Ovate±at a <br /> gasoline service stadm site Ln San joaq=County(11100 pvb,AuQguf I997� To date,we have <br /> no =co=ati on_regareim g the uSe of EIRE in E'.,��iiRz;f7 a <br /> Tine iniroducdon of these addrdves present analytical problems for laboratories because the <br /> multiple ana17tes rant elute from the aoivam. For ins ,T_AlvM may co-ehite with <br /> b ersze'_Yse in the EPA-3020 mai7ticai method commonly used today. -ML—z e ,we b H that <br /> Mass Spe.-ovizotomery(M5) is the most die procedure to demi a oxy�ate <br /> conmavnds. yNO wf3I Madly==ease the cost of saaraie anaiysis;bur,anti.m=dL--- <br /> co=—he sive analytial method is developed that ran c==gg=sh betweemn the caanpourlrs, <br /> we believe that E-71A Method 8250 is the mast reliable,readuy available=ce=--ror <br /> Laboratories. Comniedon ai=t;csed stumes on anaiyacai procedures for oxYl*sate <br /> eompo=n s by t*seLa wrrmce ave=ncre N-at=d Laboratory,under ccn=act to the Stam <br /> Water Res=ces C=rt=d Board, shouid provide ar;r;rP;a ai a ridance by early 1-1198_ <br /> ,�1ts Pzprr Ow err=to amore mrd 4mc cr�.e?uormy Qf C�orme.-.am-resoms ,ud <br /> . <br /> cc=a dWirP.Mx4r 9110 -Ili 41r— y <br />