NYC-WTC_000232844

NYC 9/11 Public Portal Document

STUYVESANT HIGH SCHOOT, LEAD-IN-WIPE-DUST MERCURY PCB’S SILICA (RESPIRABLE FIBERGLASS HYDROCARBONS DIOXINS WIPE SAMPLE METALS SAMPLE DUST) Date #nf lead Lead XTeeeiiey Concentration Range of Range of Results Indoor Outdone Indoor Air Plenum Tndnor Outdoor Sample Cone. On Cone. On Cone. (3 samples per Indoor Cone. Outdoor Cone. (U) samples Readings Reading Surfaces Cone. Readings Reading Floor Window (mg/m'’) day) (11 samples (1 sample day) per (lay) (2 samples (1 sample Range of Cone. (1 sample (2 samples (1 sample O'g/'ft’) Sill (M^cm2) pee day) pee day) pee day) (2 samples pee per day) pee day) per (lay) (uU/fV) day) (ng/m’) (mg/m’) (mg/m’) (ng/m~) 02 13.02 1 cad eoiieeniralioii in all dnsi .3 ail samples ( I .1 wipe sanijiles ( I If) bulk samples fni i 2blks) wipe samples collected was blank i were blank ! for I’CBs liberglass were less tliar. all applicable collected for were collected, fhe collecled \o slandards for lead in diisI im me'cnrv vapor. pens resnilsofall lihergliiss delected floor and windowsills Lead ■fbe Lg samples were below. in all III samples coiiecntralion in lhe blanks llicrcporlitig limit was below tbc detection limit. css.-tilially of2 ug.sanii»le. indisi iiyLiidiable Iromibc blank. Additional sample collected (I 1 blank) inside the disti ibutuni air duets and na.xing bo.xes in air handling units. Results of all samples me lading blanks ai e bclew lloor surface guidance

3 air samples ( 2 blanks) were collecled Ibi lead. The blanks) le vels of airborne lead did not exceed tbc 1 mil of Jelection many ol'llic samples.

O2'2()'02 1 cad concentration m all dust 3 air samples ( 1 10 settled dust bulk 3 air sample ( 1 blank) lor llCs (I 2hlks) wipe samples collected was blank I were samples were weir collected. Monc of the IK s less than all applicable' collected lor collecled \n wciv present above the limit of standards for lead in duel on mercury. .Mcrenrx liberglass detected detection in any of the samples. lloor and windowsills. Lead was del eel cd on in all 1 fl samples eoiiccnlralioii in the blanks the rook al a kwcl was below the deleclion limit. grealer than Ilie blank. I cad tontcnlraiion in all dust (I 2 biks) wipe samples collected was less thar. all applicable standards for lead in diisl on Ik'oraiid ^'llldo^'sills Lead eonecntralioii in the blanks was below tbc deleclion limit.

c; I TY_2 IMO 10 0_0 0 31.3 86 2 7

NYC-WTC_000232852