Average (standard deviation) soil concentrations (ppm) of heavy metals by landuse type in Santa Ana, CAa.
| N b | Pb | As | Mn | Cr | Ni | Cu | Cd | Zn | |
|---|---|---|---|---|---|---|---|---|---|
| Industry | 89 | 122.6 (164.8) | 8.4 (6.2) | 736.0 (866.0) | 72.1 (25.0) | 50.0 (16.0) | 291.8 (221.6) | 2.8 (3.5) | 449.3 (342.7) |
| Park | 161 | 72.5 (75.3) | 7.1 (6.3) | 647.8 (128.0) | 56.0 (10.9) | 37.8 (9.1) | 44.4 (14.7) | 1.2 (0.5) | 201.2 (79.8) |
| Residential | 1173 | 128.4 (187.9) | 8.3 (8.5) | 661.0 (109.5) | 65.7 (20.3) | 37.6 (7.9) | 64.4 (32.2) | 1.7 (1.1) | 338.7 (236.8) |
| Roadway | 76 | 172.9 (251.1) | 11.9 (21.6) | 658.9 (127.3) | 66.0 (25.4) | 43.7 (16.7) | 64.0 (34.6) | 1.6 (0.9) | 313.9 (142.4) |
| School | 10 | 37.9 (12.9) | 9.8 (16.2) | 527.9 (40.3) | 52.8 (5.6) | 34.0 (6.3) | 48.1 (14.2) | 0.88 (0.5) | 279.6 (175.6) |
| All | 1528 | 123.1 (181.3) | 8.3 (9.3) | 663.4 (236.0) | 65.0 (20.3) | 38.7 (9.7) | 67.6 (79.6) | 1.7 (1.4) | 328.0 (233.3) |
a
The landuse type with the highest mean concentration is shown in bold for each column.
b
N, number of samples.