| Date | Owner | Type | Security | Price | Units | Value | |
|---|---|---|---|---|---|---|---|
| Nolan Stephen A | A | Common Stock | |||||
| Friedberg Daniel M. | A | Common Stock | |||||
| Hampstead Park Capital Management, LLC | A | Common Stock | |||||
| Hampstead Park Environmental Services Investment Fund LLC | A | Common Stock | |||||
| Moss Perry W. President and CEO | A | Common Stock |