Air sample lab report, Broadway and 31st St, Oct 2001

NYC 9/11 Public Portal Document HEDNEAULT ASSOCIATES PAGE 08 10/22/2001 17:08 6314676305

] frepared Exclusively For: PEDNEAVLTASSOCIATES, INC NYCDEP-Emergency Respons e & Tech Assmt. lenWNTfiAVENUE, sox205, BOHEMIA. H.Y, 11716 96-05 Horace Harding Expressway LAB#: 01100399 Corona , NY 11368 PROJECT ID WORLD TRADE CENTER- 5 Boro Sampling (718) 595-4650 MATRIX: AIR\GAS

COLLECT date DATE RECEIVED RELEASE DATE REPORT Date 10/19/0; 7:45 PM 10/19/01 9:50:00 PM 10/22/01 10,22/01 SAMPLE ORIGIN BERRY ST. & NORTH 11th ST. BROOKLYN SAMPLE ID#: 01100399-004 result UNITS M.D.L. METHOD ANALYSIS DATE Dichlorodifluoromethane 1.14 ppb v/v 0.123 USEPA TO-15 10/21/01 Chloromethane 0.24 ppb v/v 0.1037 USEPATO-15 10/21/01 1.2-Dichloroietrafluoroethane ND ppb v/v 0.2886 USEPATO.15 10/21/01 Vinyl Chloride ND ppb v/v 0.1249 USEPATO-15 10/21/01 Bromomethane ND ppb v/v 0.2418 USEPATO-15 10/21/01 Chloroethane ND ppb v/v 0.2478 USEPATO-15 10/21/01 T richlorofluoromethane 0.46 ppb v/v 0.1839 USEPATO-15 10/21/01 1,1-Dlchloroethene ND ppb v/v 0.0799 USEPATO-15 10/21/01 Methylene chloride ND ppb v/v 0.1909 USEPATO-15 10/21/01 Freon 113 ND ppb v/v 0.161 USEPA TO-15 10/21/01 1.1-Dichloroethane ND ppb v/v 0.1398 USEPATO-15 10/.21/01 Methyl-tert-butyl ether 4.13 ppb v/v 0,128 USEPATO-15 10/21/01 cis-1,2-Dichloroethens ND ppb \iN 0.1763 USEPATO-15 10/21/01 Chloroform ND ppb v/v 0.1681 USEPATO-15 10/21/01 1,2-Dichloroethane ND ppb v/v 0.1688 USEPATO-15 10/21/01 1,1,1-Trtchloroethane ND ppb v/v 0.0974 USEPATO-15 10/2 I/O 1 Benzene 0.79 ppb v/v 0.1201 USEPATO-15 10/21/01 Carbon Tetrachloride 0.12 ppb v/v 0.0922 USEPATO-15 10/21/01 1,2-Dlchloropropane ND ppb v/v 0.1138 USEPATO-15 10/21/01 Trlchloroethene ND ppb v/v 0.1329 USEPATO-15 10/21/01 cis-1,3-Dichloropropone ND ppb v/v 0.0924 USEPATO-15 10/2.1/01 trans-1,3-Dichloroprop€;ne ND ppbvAr 0.1222 USEPA TO-15 10/21/01 1,1,2-Trichloroethane ND ppb V/v 0.0896 USEPATO-15 10/21/01 Toluene 2.27 ppb v/v 0.0735 USEPATO-15 10/21/01 1,2-Dlbromoethane ND ppb v/v 0.0971 USEPATO-15 10/21/01 Tetrachloroathene ND ppb v/v 0.0845 USEPATO-15 10/21/01 Chlorobenzene ND ppb v/v 0.1343 USEPATO-15 10/21/01 Ethylbenzene 1.37 ppb v/v 0.0744 USEPATO-15 10/21/01

John Pedneauit Page 7 of 16 ND=RESULT IS EQUAL TO OR LESS THAN MDL Lab Director NYS ELAP #10224 MV,/0E #46075

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