Sewer Disposal Approval Guidelines
Effective immediately, the EH&S Environmental Compliance Division (ECD) has pre-approved the below listed waste streams for sewer disposal. These waste streams no longer require approval by EH&S prior to sewer disposal. However, if your lab sewers any of the pre-approved solutions below, please document this information in your lab-specific training. Please forward this information to appropriate labs within your Department. EH&S is available to answer any questions. Thank you.
| Solution | Campus Approved |
| < 3% hydrogen peroxide aqueous solutions | WUSM and Danforth |
| < 4% Paraformaldehyde in Phosphate Buffered Saline (PBS) | WUSM and Danforth |
| ≤ 10% bleach aqueous solutions | WUSM and Danforth |
| Calcium chloride aqueous solution | WUSM and Danforth |
| Cell culture media deactivated with 10% bleach solution | WUSM and Danforth |
| Ethylenediaminetetraacetic acid (EDTA) | WUSM and Danforth |
| Glucose aqueous solutions | WUSM and Danforth |
| Phosphate buffer aqueous solution (PBS) | WUSM and Danforth |
| Saline aqueous solutions | WUSM and Danforth |
| Sucrose aqueous solutions | WUSM and Danforth |
| Tris buffer | WUSM and Danforth |
| Tris buffered saline (TBS) | WUSM and Danforth |
| Tris-acetate-EDTA (TAE) buffer | WUSM and Danforth |
| TWEEN buffer | WUSM and Danforth |
| Unused cell culture media | WUSM and Danforth |
| Formalin < 10% | WUSM only |
| Gel Green | WUSM only |
| Gel Red | WUSM only |
| Magnesium sulfate aqueous solution | WUSM only |