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OCT-21-1998 10 01 SHERWOOD LABS 2096672581 P 01 <br /> ' r V-U. L-I l 1 Q/. ­V— <br /> To <br /> V.c.io , / From <br /> co./mept <br /> Phone!k la PhonB u- �7 <br /> 510/w-13M I <br /> Fax 8 5 1 I (.r, Fax# <br /> LJ <br /> ca&zu. <br /> April 8, 1998 <br /> of Pas WTlscw <br /> T"V$WMUWCJ Cowerwer <br /> cbffilo <br /> HAZtwous;ffiinom Gs 44onuwRy- Set►'MPY Jbr <br /> 2131 aerft&q Way Emr aw mpod <br /> JWArky, C4 947N PIP06V M <br /> Allan Aks <br /> Entech Analytical Labs, Inc <br /> 525 Del Rey Avenue, Suite E <br /> Sunnyvale. CA 94086 <br /> re Use of EPA Method 8240 for oxygenate analysis <br /> iDear Mr Aks <br /> --� You asked whether EPA Method 8240 is acceptable for oxygenate analysis As <br /> explained below and in the attached memo, Method 8240E and other methods from <br /> Update ll of SW-$46, Test Methods tar Evaluating Solid Waste," are acceptable for the <br /> analysis in the Hazardous Waste Fields of Testing MTBE and other oxygenates can <br /> be measured by both 5244 and 8260, the lab doing the work should demonstrate <br /> through the analysis of spikes that the analytes can be measured reliably at the level of <br /> interest. I encourage you to mance the transition to EPA Method 82608, which is the <br /> currently approved GC-MS method for volatile organics in SW4346 in the meantime, <br /> both Methods 8240 and 8260 are acceptable methods for volatile organics by GC-MS <br /> If you have any additional questions. feel free to call ma at (510) 540-3112 <br /> :?on <br /> ely, <br /> P Simmons, PhD . Chief <br /> George Kulasingamr ELAN <br /> wr.rwll�t.ti.. <br />