NYC-WTC_000220576

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|CAI.CULAT1ON FOR OSHA 1D121/125G- METALS IN AIR VIA CASSETTE FILTER (37MM MILLIPORE) & MOBILE VACUUM PUMPS | I ■D o c o J A= Concentration of Analyte in sample solution (ng/ml) or (mg/L) CT o ro o' KJ jB=Concentration of Blank in sample solution (pig/ml) or (mg/L) ■D o o cn 00 cn ■SSV= Sample Solution Volume ASSV= Analyte concentration x Sample Solution Volume AR= (A X SSV) - (B X BSV) 3. 03

■ BSV=Blank Sample Volume BBSV=Blank concentration x Blank Sample Volume AV o o ! RAB= Reagent Blank Concentration (pig/ml) or (mg/L) o c ! RABSV= Reagent Blank Sample Volume 3 CD

! D= Dilution Factor (NONE) Ino GRAVIMETIC FACTORS For the Trip Blank Analytical Value: IAV= Air Volume Sampled AR= (B X BSV ) - (RAB X RABSV) I AR=Analytical Result AV lARR=Analytical Reportable Result in mg/m^ (rounded off to 3-sigma)

A (mg/L) SSV (mL) A X SSV = ASSV B (mg/L) BSV (mL) B X BSV = BBSV ASSV -BSSV = AR AV Liters AR/AV ANALYTE ARR mg/m’ 0-1 100 10 0.223 100 22.3 -12.3 30 -0.41 Aluminum- Al <0.01 '"■0.639”" 100 3.9 6.62*4* 100 2.4 1.5 30 0.05 Antimony-Sb 0.05 "‘6‘.6‘67‘‘“ 100 0.7 b*.*o*6*3* 100 0.3 0.4 30 0.0133333 Arsenic-As 0.01 ■‘‘6.‘o‘O3‘‘'‘ 100 0.3 6.4‘62 100 40.2 -39.9 30 -1.33 Barium-Ba <0.01 "‘b'‘o‘6i‘‘'‘ 100 0.1 b*.*o*6*i* 100 0.1 0 30 0 Beryllium-Be <0.01 100 0 '6*0*61' 100 -0.1 0.1 30 0.0033333 Cadmium-Cd <0.01 “■b‘.‘3‘33‘'‘ 100 33.3 6.'3*1"6* 100 31.6 1.7 30 0.0566667 Calcium-Ca 0.06 ■■‘‘6"666‘‘" 100 0.6 6.66*4* 100 0.4 0.2 30 0.0066667 Chromium-Cr <0.01 “‘6.063"' 100 0.3 6.66*2* 100 0.2 0.1 30 0.0033333 Copper-Cu <0.01 “‘o.'o'fe 100 7.6 6.*1*3*9 ‘ 100 13.9 -6.3 30 -0.21 Iron-Fe <0.01 “‘-'o"6b‘3‘‘" 100 -0.3 ***'*-b*.*o*6*4‘ 100 0.1 30 0.0033333 Lead-Pb <0.01 “"‘6?b'6‘ 100 6 6'66? 100 6.1 -0.1 30 -0.0033333 Magnesium-Mg <0.01 “‘6.625*" 100 2.5 ■‘***'6.623* 100 2.3 0.2 30 0.0066667 Manganese-Mn <0.01 o 100 100 30 Mercury-Hg <0.01 H K 0.004 100 0.4 0.003 100 0.3 0.1 30 0.0033333 Nickel-NI <0.01 I ‘0.583 o'.T64 100 10.4 100 58.3 -47.9 30 -1.5966667 Potassium-K <0.01

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b.'o'oT 100 100 1 0.1 -o.'o’oa' ‘o.boi’ '2.626 100 100 -0.8 0.1 1.8 0 30 30 0.06 Selenium-Se 0 Silver-Ag 0.06 <0.01 o ‘<.‘7'13 100 171.3 100 262.6 -91.3 30 -3.0433333 Sodium-Na <0.01 I o 0'062 100 0.2 100 0 0.2 30 0.0066667 Thallium-TI <0.01 o o‘.oi7 100 1.7 ‘ 0.2*27' 100 22.7 -21 30 -0.7 Zinc-Zn <0.01 CO CO CR LAB ID #01110052-005 CO Mvr'nco ATI AMTir A\Z «. QKAITU CTP nonnKI VM