345 CHAMBERS STREET; Block: 16; Stuyvesant HS

NYC 9/11 Public Portal Document 02/07/2002 10:26 FAX 212 353 8306 ATC 0009/014

Rcrpiruble I urliculttli.•s Concegtratians and Ambient urea air saptpic *CE. l rcrults_rurasbct in

Date Total Outdoor Runre of I . umber of Number of 'Number of Resultt, prTEMl Nu ber Rvailings nd'in rq rdin aab ttasanalviiLL I nr (µglm) 0 '40 }utiJmgla~ ;I > . I) atIt»gmt corec ti lc (. trnt'Torea/mm.) rcadins (µyin&) ; 65 µg/m° (14 brs tubrstas (Area clearance cvNrcted I 241trs a%crrgc) i TEM criturla -1U atciv8c) anahsip struclurcahnm2) 9' 1/U1 Induvr Air Qunlit) As,cssment qA ) diii not started at dus point 3 _ -ff No structures crecred I014101 5 l+fo structures Octecred 101 901 611 22.2 atrucLurYs.mm- wi rc detected in one sample 10/6101 7 No 3lructures Detected 10/7101 7 No structures Detected 1018101 7 Ne stiucturrst Detected 'iW,UF 104 20 Md 30 —3 U No structures Detected 101 Id1 I and 18 12-55 0 t2 No structures Detected 11101 96 T3and42 18.41 1 12 No ucturçiDotecc4 1011210 l 99 511 i&-0 30 0 Il NoarructuresDotected 10113/01 Indoor air quality assessment. was not performed - Wcekcnd 12 22.2 struetures/mrlt- were detected In one samplo 10/14/C I Indoor air quality assessment was not performed - Weckend I2 No structures DcLccted 10/12101 102 I2and 14 9.33 0 U I3 o structures ted 1 116/01 114 25 and 35 12-37 13 NosrrueturesDetected toiliioi 121 5 and 11 4-27 0 0 12 No structural Detected 10/18/01 10. 9 and 14 4-2 0 20 22.2 structuree/mm were detected in one sample 10/19/01 101 21 and 75 13-47 17 0 21 No iicrur Deroctcd 10/2010 i No rea freebie pariculato roadine were collected - Weekend 20 No structures Detected 10(21/01 No t'esplrabic part culate readings were Collected - Weekend 20 12.2 9 'uowres/mm" - were detected In one lam le 0/22/01 liii 74 and 145 21-104 46 33 21 No structutes erected 10/23/01 228 10 and 136 32- 132 19 107 21 No structures Dected 10/24/01 101 76 and 81 27- 6 62 26 21 No structures Detected 10/25/01 101 17 attd 54 --- 1—I - Si 1G 0 21 Na strucnircs Detecrc -1 126101 99 21 and 33 9-29 0 0 21 222 structures/mm- were detected in one sample 10/27/01 Na resplrabic particulate readings ward collectedWeekend 21 Nc structures Detected 10/28/01 No respirable partiuiate rand s worn collected - Weekend 21 No SUVctures Detected 10129/01 101 23 and 48 12-41 1 0 3t. No atrucluros Detcctod 10/30/01 124 34 and 53 12- 131 0 1 21 No structures Detected 10/31/01 116 24 and 46 12-3a 0 21 No structures Detected 11/1/01 115 83 and 101 37-U 85 18 21 No structures Detected 11/02/01 117 54 and 7R 38 -51 97 20 21 No structures Deteeted 1113/01 No respirable ptutieu art readings were eallceted -Weekend 21 No struetures Detected 1 t14!01 u ran rrabte purriculate readings were collected - Weekend 21 No structures Detected 1 1510 i 1111 27 and 3b S -21 0 0 1 Nc scrµarares etecLed i 116/01 119 14 and 14 3- 15 0 0 21 Nc structures Detected 1 1/7101 118 30.31 and 31 17.41 1 0 21 No structures Detected t 1/8/01 12U 54 and 58 I -61 7 0 21 2224 strucrures/mm` were detected in one sample 1119101 110 26 and 30 9 - 28 0 0 21 2124 structure. n1m- were detected in two samples 1 1/10/01 No respirn ie parriculnte readings were collected - Weekend 21 32.24 structures/mm- were detected in three samples I I 111/UI No respirable purtrculaie readings were collected - Weekend 21 NU Structures Detected t 1112;01 No re pintble panicubua readusas want collected —Veterans y Holiday 31 22.24 structures/mm were detected in one sample 11/13/01 117 .12 and 52 21 -52 19 0 21 -Nu structures Deterred 1111110 117 I4 and 30 19 -45 4 U 31 No t truetures Detected

NYC-WTC 000107154