EPA Special Investigative Audit Report, WTC Site, Nov 2001

NYC 9/11 Public Portal Document

The maximum concentration of lead in bulk dust samples reported was 370 mg/Kg (ppm) in a sample from the Park Place & West Broadway location on September 16'\ To date, the latest bulk dust sample results are from September 26*. The highest value for chromium in bulk dust was 100 mg/Kg from a Battery Pk & 2"“^ Pl sample, also of September 16"’. The highest concentration of cadmium was 4.9 mg/Kg, also from bulk dust at Battery Pk & 2"" Pl on September 16‘\ Select metals found in the bulk dust samples are summarized in Table 16. The profile of target analytes and concentrations did not changed significantly over the time of the sampling events, as illustrated in Figure 14 for four (4) samples, one (1) from each sampling date.

Table 16. Metals in Bulk Dust; Units mg/Kg (ppm)

fl® Date Location Barium Chromium Cadmiiim ■••■•n Arsenic Beryllium Mercury

Sept 11 Greenwich & Warren St 120 370 100 3.8 11 1.4 na

Hudson & Reade St 250 290 81 4.5 <7.8 2.5 na

Murray & West St 200 220 95 2.5 <7.8 2.1 na Warren & West Broadway 170 340 95 4.4 <8 1.4 na Sept 16 Battery Pk & 2'’=' Pl 150 280 100 3.8 2.9 2.6 0.31 Battery Pk & 2“* Pl 210 330 na 4.9 3 3 0.32 Park Place & West Broadway 370 220 57 2 3.1 1.5 0.06

Sept 18 Albany & West St 230 180 82 3.2 0(nd) 1.8 0.24

Sept 26 110 Greenwich St 97.7 195 71.5 3.8 <0.96 1.76 0.373

Metals in Bulk Dust

E a □. 400 d) 300 "6) 200 100 o 0 Cr c Cd o

Date

Figure 14. Metals Profile in Bulk Dust; Four Sites over Four Dates

Page 46 of 52

CITY_21MC100_002572263

NYC-WTC_000186240