Wood preservation facilities, chromated copper arsenate: chapter B, table 24

Table 24. Typical Background of CCA Constituents (copper, chromium, arsenic)

	Typical concentration in non-polluted environments
Element	Surface waters (mg/L)	Soils (mg/kg)
Copper (Cu)	< 0.001 to 0.04	2 to 100
Chromium (Cr)	0.003 to 0.04	5 to 1000 (50 mg/kg is normal)
Arsenic As)	< 0.001 to 0.01	1 to 50 (up to 500 mg/kg found in sulphide deposits)