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- r-ILt No. bU�3 01f2!9 '96 09.49 ID:IIN RECEPTION SRN RAMON 510 866 5681 !SAGE 3 <br /> CALIFORNIA REGJOfvwATER QUALITY CONTROL N <br /> SAN FRANCISCO 8AY REGION <br /> V01 wabsR4 67REaa,svdt eco Cl <br /> OARLAPO.CA 94612 <br /> T#I: IFIM M-1255 <br /> t►Ax; a10)=,1 jW <br /> May 2.1995 <br /> Ffie hla, 2188.1 1-(JRM <br /> i <br /> To: All LOPILIA Agencies in San Francisco Say Region <br /> From: Aep n 1. itilorse <br /> Subject:. Human Health Threat Concerns and MTBE Reporting <br /> Methyl Tertisry $rte Ether (MTBE) is a c olorlessw, relartively volatile liquid that has found widespread <br /> use since the !arty 80`s *9 a gasoline additive- Th+e:Environnmentol Protection Agencyt (EPA) <br /> Interagency Testing Committee identified MTBE for priority testing consideration based on large <br /> Production volume, po ntial widespread exposure, and lim ted data on chronic health effects. <br /> Results of this sturdy and subu quaent studies $ugpst that MTBE may P more of s threat to <br /> human health and the environment than previously suspe0ted. <br /> In order to fully evaluate this when analyzing for Total Petroleum Hydrocarbons as gasoline, k is now <br /> appropriate that MTBE be quantified using EPA teethed $020 in addkion to BTEX compounds. The <br /> dbj*ive of additional testing for MTBE is to better assess the mallnitude and threat of MTBE for <br /> hfuman health and ecolegicrtl exposure in leaking underground fuel leak sites. <br /> ft do nen intend or enticipate significant financial buras ns on the reguhn" community because of <br /> this additional reporting. ars MT13E can be easily and'inexpensively qunrrtifW whale using the existing <br /> EPA method 8020 protocol for STEX. simply bymWting its Peak which b already present on the <br /> Goa Chromatogram far this method. Several brborstoriles surveyed have iWcsted that. 9 regulatory <br /> agencies require MTBE (*putting with EPA nmrethod 502D for BTEX, no additional Costs will be <br /> charged-to the customer. <br /> Please require reporting for MTBE at cit sites with gasoline releases occurrirg after 1983 where an <br /> EPA 8020 analysis is perfomwd. Should you have any questions related to this matter, please <br /> contact J4ht1 West (510) 2854247 or Kevin Graves (510) 2WAX35 of my staff. <br /> a: Lsbaiatories Aff+lWed with the Association of CaliiomiarTesting Laboratories � <br /> Dave Rice. Lawrence Livemmre Labs <br /> James Giannopoulos. SWRCB <br /> Matt Small, EPA <br />