Lead in Solids & Soil
Analytical Method: EPA 7420 or EPA 6010
Minimum material needed: 5.0 g
Reporting Limit (EPA 7420): 10 ppm
Reporting Limit (EPA 6010): 5 ppm
Regulatory Limits:
TTLC: 1000 mg/Kg (ppm)
STLC: 5.0 mg/L (ppm)
Reporting units: mg/Kg, ppm

Conversion factor:
1 mg/Kg = 1 mg/g
1 ppm = 1 mg/Kg