Our acid-washed TCLP filters meet all guidelines for acid washing as set forth in EPA Method 1311. These filters are washed in 1N HNO3 acid, then rinsed three times with deionized water. Filters are then oven-dried at 105C prior to final conversion.

Each box of prewashed TCLP filters is supplied with an independent certification of preparation warranting that the filters were prepared by Method 1311 protocals. The certificate also gives demonstrated background TCLP metals levels.