Daily environmental monitoring summary, Oct 11 2001

NYC 9/11 Public Portal Document

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EPA-MiM(t^ai'4 BaOy Eiwironraentat-Moiltefiflg; Sum wary- .ptowa^EFATopm , Lows a Regototfons Utursday, October 11,2501 Wh^voaiiro The U.S. Environmental Protection Agency (EPA) and other federal, state and local information Sources agencies have collected extensive environmental monitoring data from the World • ■''

J ' ' Edueatfr'nal Resnufws- Trade Center site and nearby areas in Manhattan, Brooklyn and New Jersey. Since A^utEPA September 11, EPA has taken samples of the air, dust, water, river sediments and drinking water arid analyzed them for the presence of pollutants that might pose a Programs health risk to response workers at the World Trade Center site and the public. The business 'samplesare evaluated againsta varietvef bgichmarks. standards and guidelines;' Opportunittes established to protect public health under various (editions. EPA is collecting data Jol^ from 17 fixed rnonttors in ahd around ground zero and is using portable sampling equipmeht to collect data from a rang© of locations. Recursos 9R Sltults a» of 5;00 p.m. a«' 10/11

1'4 4 Wrt Ptoi(6d'Monlt<M» ,in ;Nj^Yorkand New Jersey: / I Is;-; Asbestos - EPA analyzed 17 samples taken in and around ground aero on October 10. All samples showed results less than 70 structures per millimeter squared, which is the Asbestos Hazard Emergency Response Act (AHERA) standard for r allowing children to re-enter school buildings after asbestos removal activities. This 4 brings the total number of air samples collected and analysed for lower Manhattan 14' to 693, with 27 samples above the standard.

|4 Four air samples taken in New Jersey on October 8 showed results less than the school re-entry standard^’l'his brings the total number of samples collected and analyzed in New Jersey to 90, with zero above the standard.

Stateniteland Landfill i Air (Asbestos) - Twelve samples were taken between October 3 and October 4; all Of the results were below the AHERA school »*entry standald. An additional iseventeen samples'twe collected betw^n October 9 and October 10; all were 'i 44 ■ below the AHERA standard. 4' ■ ■■ Dust Samples 4 Ten dust 'samples token-at the Staten Island Landfill on October 9'were analyzed for ??4- asbestos. All results either showed no detecton of asbestos or asbestos present at concentrations of less than 1%.

i'4'^ Arnbient'Alr^»W|»Una: • PM 2.5 - Monitoring for fin© particulate matter (particles less than 2.5 micrometers in diameter)'was eondyctedtOctobers at Pace University, the Borough of Manhattan Communiy'^^ilef® and th© O.S. Coast Guard 'building, located Io 'Battery Park,' M 24-hour average values 'we below the National Ambtont Air Quality Standard (65 ug/m3) tor all stations.

VOCs- Sampling for volatile organic compounds (VOCs) was conducted on October 10 in and around ground zero. Benzene was detected above the OSHA limit in the smoke plume of th® debris pile, but not at a location outside the perimeter of ground zero.' Overall readiogs for VOCs, including benzene, have decreased in. ■. comparison with previous readings.

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