Depth below bottom of pit to ground water less than 10,000 mg/l TDS | Constituent | Method* | Limit** |
25-50 feet | Chloride | EPA 300.0 | 20,000 mg/kg |
51-100 feet | Chloride | EPA 300.0 | 40,000 mg/kg |
>100 feet | Chloride | EPA 300.0 | 80,000 mg/kg |
*Or other test methods approved by the division
**Numerical limits or natural background level, whichever is greater
N.M. Admin. Code § 19.11.4.19