DEP memo on vehicle release from Ground Zero, January 24,

NYC 9/11 Public Portal Document 1-24-02;12:3OPM;NYC Law Department :12123S1SY65 # 20/ 55

JAN-22-2002 03=52 OSEP UNIT RM. 7345 202 324 9235 P.16/43 Industrial Hygiene Survey Federal Bureau of Investigation, Staten Island, NY

Volatile Organic Compounds Two personal samples were collected on charcoal tubes and scanned for volatile organic compounds. There were no VOCs detected. Levels of each organic compound were below 5 micrograms. This is below 0.05 mg/M3 for each VOC. This is well below any of the PEL’s for the organic compounds tested. Additional sampling has not been done since October.

Noise Noise exposure monitoring was conducted on twelve wprtos in the debris field. The following Jil table summarizes the results. '

Sample description Time Average % Dose sampled Exposure dBA NYPD working in the debris field___________ NYPD working in the debris field On agent in debris field 5 hrs 40 min 3 hrs 21 min 5 hrs 9 min 84.0 80.0 75.37 31 10.5 8.49 51.0 n On agent in debris field 7 hrs 52 min 85.25 On agent in debris field 5 hrs 58 min 74.7 8.9 On NYPD in debris field ■6 hrs 30 min 84.5 37.5 On NYPD in debris field 5 hrs 31 min 78.3 9.1 On NYPD in debris field__________________ 5 hrs 14 min 76.8 10.6 On NYPD at screener 6 hrs 36 min 80.72 23.36 On NYPD in debris field__________________ 3 hrs 53 min 77.6 8.7 On NYPD in debris field__________________ 3 hrs 52 min 75.05 6.14 On NYPD at conveyor 5 hr 28 min 85.76 35.09 On NYPD in debris field__________________ 7 hrs 20 min 81.58 28.6 On FBI agent in Bldg. 7 debris field 5 hrs 46 min 70.6 5.59 On Customs agent in the Bldg. 7 debris fields 6 hrs 43 min 71.0 6.0 On FBI agent working in the Bldg. 7 debris field 5 hrs 31 min 72.14 5.81 On Secret Service Agent working at the screener 6 hrs 12 min 85.29 40.23 % On Secret Service Agent working at the screener 6 hrs 8 min 85.11 39.03 On FBI agent at screener 7 hrs 43 min 82.14 32.53 On FBI agent at screener and in debris field 3 hrs 51 min 69.8 2.92 On FBI agent at screener 7 hrs 43 min 82.38 32.65 On NYPD at conveyor 6 hrs 42 min 85.13 42.7

The OSHA action level for noise exposure is 85 dBA over an 8-hour time weighted average. The permissible exposure limit is 90 dBA over an 8-hr TWA. Working at the screeners (on the conveyor belt), usually results in exposures around 85 dBA when averaged over the entire shift. Workers all wear hearing protection when on the conveyors, and they should continue to wear them. Workers in the debris filed are exposed to levels well below the action level of 85 dBA ■ and are not required to wear hearing protection.

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