The TC (toxicity characteristic) is effective 9/25/90. There are different TC compliance dates for LQG (9/25/90) and SQG (3/29/91). D008 (lead) wastes that fail TCLP but pass EP (extraction procedure) are considered in compliance with D008 treatment standard and can be land disposed (SUPERSEDED: see 63 FR 28556; 5/26/98).