Laserfiche WebLink
Memo <br />Date: 0'/12/97 <br />To: Unit 111 <br />From: Unit IV <br />RE: Sampling protocol for Routine Tank Removals <br />Recent guidance from. the CVRW(ICB revised 30 August 1997 letter suggests EPA' <br />Method 8260 as.the.method of chalce for analysis of oxygenated compounds in <br />gasoline until a more appropriate method pan be developed. The compounds that <br />should be reported using 8260 are Tertiary Butyl Alcohol (TBA), Methyl. Tertiary Butyl <br />Ether (MTBE), .D14sppropyl ether (DIPE), Ethyl Tertiary Butyl Ether (ETRE) and <br />Tertiary Amyl Methyl Ether (TAME). Analysis of samples for Methanol and Ethanol <br />should be required where there is reason to believe that these compounds were <br />stored In the underground tank(s). <br />We recommend the table entitled "Minimum Verification Laboratory Apa`ysie in the <br />Application for Permit to Close a UST include sampling for oxygenates using EPA <br />method 8260. Beacon sites should be sampled for Ethanol in addition to the above <br />five oxygenates. Any sites with a methanol tank should be sampled for that fuel. <br />Sampling for oxygenates in soil and Water using method 8260 is new for the <br />laboratories so detection limits may vary. The detection limit for the ethers in water <br />should be about 5 ppb and for the alcohols in water about 100 ppb. The detection <br />limit for ethers in soil should be beiween .01 and .05 ppm and for alcohols in soil <br />about 1 ppm. <br />Muss <br />09/1257 <br />