Humidity Cell Tests - MEND and ASTM D5744 Methods

These tests are used to evaluate the long-term weathering characteristics of mine waste materials disposed under subaerial conditions. Tests are run in strict adherence to standard procedures. Possible analyses of leachates include: pH, EC, ORP, electrical conductivity, TDS, hardness, sulfate, anions (nitrate, nitrite, chloride, fluoride, phosphate, ortho-phosphate, TKN, ammonia), alkalinity, acidity, Hg by CVAF, and dissolved metal scans by ICP-ES or ICP-MS. While similar to humidity cell testing in some ways, these tests simulate site waste disposal conditions (such as saturated, non-saturated or partially saturated) more closely and at larger scale than humidity cells.