Dust characterization laboratory analysis report, environmental testing

C 130 Liberty Street o Bulk Heavy Metals Results Occupied Areas surveyed on September 28, 2001 Is C Air Plenums and Ducts surveyed January 16 to 19,2002 c Is Elevators surveyed January 21 and 22, 2002 c Floor# Area Range of Results (ppm) Notes »T Cadmium Chromium Copper Lead Nickel Zinc Occupied area N I- 28 Return air plenum <0.341 -2.92 27 - 383 51 -1680 <22.7 - 346 18.7-68 402 - 2840 ts (C Supply air ducts tp

Occupied area 13.8-22 61 -67 371 -678 189-318 11.7-56 1667 -1757 tp a 27 Return air plenum <0.985 -18.3 15.1-488 16.1 - 392 4.23 - 303 <11.6-73 230 - 2140 I- a Supply air ducts Occupied area 26 Return air plenum <1.16-16.3 34-154 19.9-587 10.4-399 <5.78 - 69.4 98.3-2170 Supply air ducts Occupied area 15.9-68 65-203 403 - 2122 339-554 60-122 1892 - 2568 25 Return air plenum <0,389 -12.9 129-1390 55-2720 29 - 2070 40 - 504 595 • 16700 Supply air ducts I 24 Occupied area Return air plenum 3.08-9.77 58.1 -166 164 - 2040 128 - 345 <19.1-43 1330-3250 i Supply air ducts Occupied area 14.9-17.8 82-89 383 - 439 311 -342 36-71 1976 - 2187 sc c 23 Return air plenum 4.92 - 73 84-227 97 - 986 107-3820 35-98 980 - 39000 n Supply air ducts Occupied area 22 Return air plenum <0.579 ■ 6.01 33-241 59.2 - 593 <15-338 19.4-50.8 626 - 4080 S air ducts Occupied area 5.6 -16.7 66.7-157 162 -1090 111-894 16-52.7 1250 - 5240 21 Return air plenum Supply air ducts Occupied area c 20 Return air plenum o E air ducts o Occupied area 5.41 - 5.91 71.0-78.8 120-125 50-55 10-11 869 - 941 o Q 19 Return air plenum ro Supply air ducts co ■c co o Occupied area Q_ m o 18 Return air plenum o Z Supply air ducts £ o 3 c o Is I 0. Is O I6 o >- z z