NYC-WTC_000205157

NYC 9/11 Public Portal Document

SUMMARY REPORT STUYVESANT HIGH SCHOOL AIR SAMPLING RESULTS DATE TIME LOCATION RESULTS IN EPA STRUCTURES/MM^ GUIDELINE 10/09/01 4PM- 12AM Pier 25 across from North exit of school 42.86 70 s/mm^ ~ Pier 25 East side by unloading truck area ND <14.29 10/10/01 12AM-SAM Pier 25 across from North exit of school 16.67 70 s/mm'^ Pier 25 East side by unloading truck area ND <16.67 SAM-4PM Pier 25 across from North exit of school 16.67 Pier 25 East side fay unloading truck area ND <16.67 4PM-12AM Pi5L25_acrossjfromNortl^^ ND < J 6.67 Pier 25 East side fay unloading truck area 16:67 10/11/01 12AM-SAM Pier 25 across from North exit of school ND < 16.67 70 s/mm^ Pier 25 East side by unloading truck area ND < 16.67 SAM - 4PM Pier 25 across from North exit of school 16.67 Pier 25 East side by unloading truck area 16.67 4PM-12AM Pier 25 across from North exit of school ND < 16.67 Pier 25 East side by unloading truck area 16.67

Regulatory standards: All samples were analyzed using transmission electron microscopy (TEM), which provides results that are specific for the presence ofasbestos fibers. Using this method, the EPA guideline for acceptable concentrations is 70 structures per square millimeter (s/mm^).

Updated as of; Friday, October 12, 2001 1:59 PM

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NYC-WTC_000205157