Chain of Custody Form Instructions for WTC Building Sampling

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U o c o CT o Table 11 o' U CD C3> Summary of Minerals in Indoor and Ontdoor Air From Lower .Manhattan and Comparison Buildings Above 59th Street *♦**»* O 3. O) Air Samplesfrom Lower Manhattan Air Samples From Comparison Buildings !D Number Number O of Quartz Calcite Portlandite Gypsum Mica Halite of Quartz Calcite Portlandite o Gypsum Mica Halite o c Samples Samples 3 PM 100 Q 3 Number (Frequency 14(14%)'* 9(9%) 8(8%) 24 (24%) 2(2%) 4(4%) ND* ND ND 1 (14%) ND ND detected %) 101 7

Air Concentration 3-13? 3-14 J 16-95 J 3-14 J 9-13 J 4-14 J 3J (Ug/m’) PM 10 Number (Frequency 11(10%,) 10(10%) 10(10%) 33(31%) 1(1%) 5(5%) ND ND ND 3 (30%,) ND ND detected %) 105 10

Air Concentration 3-12? 3-5 J 14-25 J 3-14 J 8J 4-5 J 3J (ug/n?) PM 4 Number (Frequency 13 (11%) 13(11%) 12(11%) 40(35%) 4(4%,) 3(3%) 11 ND ND ND 3(27%,) ND ND detected %) 114

Air Concentration 4-19 J 4-10 J 21-84 J 4-15 J 14-431 7-19 J 5J (Ug/n?) PM 2.5 Number (Frequency 1 (3%) ND ND 1 (3%) ND ND ND ND ND 1 (17%,) ND ND detected %,) 34 6

Air Concentration 31 31 31 (Ug/n?)________ Range of Detection limits (ug/m J_____ PM 100 2-51 2-51 12-261 2-51 7-151 4-81 2-51 2-51 12-261 2-51 7-151 4-81 PM 10 2-51 2-51 12-261 2-51 7-151 4-81 2-51 2-51 12-261 2-51 7-151 4-81 PM 4 4-61 4-61 20-301 4-61 11-171 6-91 4-61 4-61 20-301 4-61 11-171 6-91 PM 2.5 2-41 2 4J 13 201 2-41 7-111 4-61 2-41 2-41 13-201 2-41 7-111 4-61

a. Where two samples were co-located—the greatest value of the two was included in this summary. Each location is only represented once in this table. b. Concentrations shown are estimated values, indicated by “1.” c. Air samples from all locations, indoor and outdoor, are pooled in this table due to uncertainties in the data. d. Cristobalite, a different crystalline form of silica, was found in one Lower Manhattan air sample at 15 micrograms per cubic meter of air (l^/rt^) 1 in the PM 100 fraction. e. 1 = estimated. f. ND = not detected.

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