ACAT FOIA Repository 18

AUG 25 2004 1:07PM. p. 4HP LASERJET 3200IntroductionOne sample labeled Site 18 was received at Zymax on 29 July, 2004 for petroleum fuelcharacterization. It was anticipated that free product would be present. However, Zymax wasunable to separate enough free product, and the sample was treated as a water sample, andanalyzed as TPH diesel by low resolution GClMS.GC/MS.The complete laboratory data report is presentedpres~nted as an Appendix to this report.Methodology·TPB (Total Petroleum HydrocarbolUl)HydrocarboWl) as diesel by GCJMS CombinationWater samples are extracted with methylene chloride solvent and the solvent extractconcentrated. Soil samples.are sonicated with methylene chloride solvent and the solvent extractconcentrated.The extract is injected into a GC equipped with a 30 meter narrow bore DBS capillary column toseparate the hydrocarbon, which are detected with a mass spectrometer (MS) interfaced to theGC. TPH concentrations are calculated by comparison with a standard diesel fuel.Site 18 Gambell RIFSPage 3200-1fF10AK069603_03.01_0025_aA~G 25'AI:lG25. 200420Q41:07PM1: O?PMp.5LASERJET 3200HP LA5ERJETProduct CharacterizationThe sample contained 22 mgIL of TPH, the chromatogram.chromatogram of which is shown below. Achromatogram of a #2 diesel standard is shown for comparison. The Site 18 extract has anarrower distribution with less of the higher boUing hydrocarbons. This is characteristic of a lightdiesel such as Arctic Diesel. The ratio ofnC l7/pristane (Pr) is around 2, which is similar to manyfresh diesels dispensed in thetbe US. This indicates that the diesel in the Site 18 water hasexperienced, at most, mild degradation from environmentalenvironmcn121 cxpo;;ure,cxpo;;ure."".....·",.Cil"_m3CIll!If.D("'ut-3'"...It.,,..4IlD.....n,n.,~I~FiFi13It"~I~noIAo ....:ae.\1 USite 18 Gambell RIFSPage 4·.Cossaboom, Carey C POA02Sharp-Dahl, Julie LL POA02Tuesday, September 07,200409:3207, 2004 09:32 AMGeist, Lisa KK POA02Cossaboom, Carey C POA02Gambell fuel analysis (from GW sample)From:Sent:To:Cc:Subject:~gambell fuelproduct data. pdfisa,Here's the "forensics" guys take on the water sample you sent in with fuel.Bottom line is, the sample looks too fresh to be from a FUDS site.clearly shows this!The chromatogramQuestion- what did the city spill- Arctic diesel?Julie-----Original Message----From: Sharp-Dahl, Julie L POA02Sent: Tuesday, September 07, 2004 9:28 AMTo: Sharp-Dahl, Julie L POA02Subject: Scanned document -- 9/7/2004 9:27:59 AMGambell fuel product data attcahedThis PDF file was created using the eCopy Suite of products. For more information abouthow you can eCopy paper documents and distribute them by email please visithttp://www.ecopy.com1