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• i I� x <br /> 13 <br /> 1 STONES 'i .ra •J-�r J <br /> `.1 LB0RA <br /> 397 MATHEW ZTREET, SANTA CLARA, CALIFORNIA 95050.3158 {408) 727-4277 <br /> April 22, 1985 <br /> IT Corporation <br /> Engineering Department <br /> 1815 Arnold Drive <br /> Martinez, CA 94553 <br /> ATTN: Bob Galbraith <br /> Following are the results of our analyses for the presence of <br /> volatile hydrocarbons due to gasoline and ethylene dibromide (EDB) <br /> in ten samples of water received on April 16, 1985. <br /> For the analysis of volatile hydrocarbons due to gasoline, the <br /> samples were examined using the purge and trap technique. Final de- <br /> tection was by gas chromatography using a flame ionization dete^tor <br /> as well as a photoionization detector and a Carbopack B/3% SP-1500 <br /> column. <br /> The analytical procedure for EDB involved extracting the samples <br /> with iso-octane. The resulting extracts of iso-octane were examined <br /> by GLC using an electron capture detector and a Carbopack BJ1% SP--1000 <br /> mss, <br /> column. Confirmation of positive residues was performed by GLC using <br /> is an electron capture detector and an n-octane Porasil C column. <br /> nd nonce detected _ Results <br /> Stoner Sample Micrograms per_Liter <br /> Lab. 11 Identification Volatile Hydrocarbons <br /> Due to Gasoline Xylene isomers <br /> Job ME6004 (includes benzene, and Ethylene <br /> 4/15/85 toluene and x•lenes) Benzene Toluene ethyl benzene dibromide <br /> 27$22 KYO-501, 11W-8 22,040. 4,600. 70D. 11300. nd <br /> 27823 KYO-502, Mw-6 140,000. 14,600. 28,000. 12,000. 1.4 <br /> 27824 KYO--503, MW-7 240,000. 14,000. 32,000. 23,400. C.7 <br /> 27825 KYO-504, MW-9 6,400. 160. 58. 85. rid <br /> 27826 KYO-505, Fast Gas nd nd nd nd ltd <br /> Station Well <br /> 27827 KYO-506, W-1 18,000. 3,800. 160. 170. nd <br /> 1 <br /> 00 <br /> f,�i - These iesuits were obtained by IOliow.nj standard la0043101y p.o—Cures.in,-4ao-i!Vol the corpdwt-oo shall not e.ceed the anbunt paid for INS tepolt - <br />