NYC-WTC_000199709

NYC 9/11 Public Portal Document

i Jessic'a Leighton - RA_sitrepO4-16.wpd Page 4

Public School 44: 80 Maple Parkway, Staten Island (Site 8) Public School 199: 3290 - 48'^ Ave., Queens (Site 9) o During this period a total of 7 samples were collected from these monitoring sites. o All of the samples were below the TEM AI lERA standard.

NYC / ER (Apr 11) - Particulate Monitoring (Dataram)

o Particulate levels noted at Locations L, N, and R were below the OSHA TWA. o Instruments operated approximately 8 hours. o Station L had an average of 13.36 ug/m' with a maximum reading of 49.75 ug/m\ o Station N had an average of 21.64 ug/m’ with a maximum reading of 43.34 ug/m\ o Station R had an average of 27.41 ug/m" with a maximum reading of 45.94 ug/m\

NYC / ER (Apr 12) - Particulate Monitoring (Dataram)

o Particulate levels noted at Locations L, N, and R were below the OSHA TWA. 0 Instruments operated approximately 8 hours. o Station L had an average of 60.46 ug/m^ with a maximum reading of 103.58 ug/nT. o Station N had an average of 55.73 ug/m’ with a maximum reading of 74.82 ug/m\ o Station R had an average of 53.62 ug/m^ with a maximum reading of 102.68 ug/m\

NYC / ER (Apr 13) - Particulate Monitoring (Dataram)

o Particulate levels noted at Locations L, N, and R were below the OSHA TWA. o Instruments operated approximately 8 hours. o Station L had an average of 45.14 ug/m’ with a maximum reading of 138.50 ug/m\ o Station N had an average of 43.34 ug/m’ with a maximum reading of 127.06 ug/m’. o Station R had an average of 38.43 ug/m^ with a maximum reading of 99.34 ug/m\

NYC / ER (Apr 14) - Particulate Monitoring (Dataram)

o Particulate levels noted at Locations L, N, and R were below the OSHA TWA. o Instruments operated approximately 8 hours.

CITY_21MC100_003051226

NYC-WTC_000199712