| 24-7 Septic Llc, Dba 24-7 Septic | Portland, OR | InstallerPumper | 39904 |
| A-Affordable Septic Service, Llc | Canby, OR | InstallerPumper | 37918 |
| Aasen Excavating Llc | Canby, NJ | Installer | 39775 |
| Advanced Home Services Llc | Oregon City, OR | Installer | 39864 |
| All Terrain, Inc., Dba Cascade Septic Tank Service | Boring, OR | InstallerPumper | 35498 |
| All United Plumbing & Construction Llc | Molalla, OR | Installer | 39903 |
| Andrew Excavation & Septic Llc | Beavercreek, OR | Installer | 39719 |
| B & G Excavation & Plumbing, Llc | Damascus, OR | Installer | 36685 |
| B & R Precision Excavation Llc | Oregon City, OR | Installer | 39390 |
| Bennett Septic Service, Llc | Molalla, OR | InstallerPumper | 39252 |
| Bever Homes, Inc | Estacada, OR | Installer | 39351 |
| Blaesing Excavation, Llc | Sandy, OR | Installer | 38952 |
| Brian Gautney, Dba All-Ways Excavating | Brightwood, OR | Installer | 37546 |
| Bruce Johnson Construction, Llc | Boring, OR | Installer | 35504 |
| Byers Septic Tank Service, Inc., Dba Oregon Waste Water Services | Oregon City, OR | InstallerPumper | 33052 |
| Canby Excavating, Inc. | Canby, OR | Installer | 35815 |
| Catman Excavation, Inc | Boring, OR | Installer | 39890 |
| Chris Cory Excavating Llc | Canby, OR | Installer | 39195 |
| Circle H Excavating, Inc. | Molalla, OR | Installer | 39937 |
| Coffman Excavation, Inc, Dba Coffman Excavation | Oregon City, OR | Installer | 35524 |
| Crestwell Construction & Development Corp. | Colton, OR | Installer | 35332 |
| Dan Cunningham Excavating Inc | Boring, OR | Installer | 38489 |
| David Linn Trucking & Excavation,Llc | Brightwood, OR | Installer | 38876 |
| Drain Pro Inc Or, Dba Drain Pro | Boring, OR | InstallerPumper | 38888 |
| E & A Systems, Inc | Eagle Creek, OR | Installer | 38963 |
| E And Z Excavating Llc | Molalla, OR | Installer | 39104 |
| Elite Septic And Sewer Llc | Estacada, OR | Installer | 39792 |
| Elkhorn Construction, Llc | Sandy, OR | Installer | 39107 |
| Emerald Creek Homes, Inc, Dba Richard E. Niday Construction | Welches, OR | Installer | 37537 |
| Flying H Construction Co. | Wilsonville, OR | Installer | 37556 |
| G.I. Goes, Llc, Dba G.I. Goes | Lake Oswego, OR | Pumper | 39856 |
| G&G Building Llc | Boring, OR | Installer | 39853 |
| Green Mountain Excavation Llc | Mulino, OR | Installer | 39837 |
| Gunter'S Construction & Excavating, Inc. | Colton, NJ | Installer | 39789 |
| Happy Septic Llc | Portland, OR | Installer | 39931 |
| Hayes Excavation Company | Estacada, OR | Installer | 39378 |
| Honest Drain Solutions Llc, Dba Hds Septic Pumping | Oregon City, OR | InstallerPumper | 39093 |
| Infinity Excavating Inc. | Sandy, OR | Installer | 39855 |
| James Plumlee Llc, Dba Pluum Construction | Portland, OR | Installer | 39929 |
| Jeremiah, Inc., Dba American On Site | Molalla, OR | InstallerPumper | 38346 |
| Jim Hicks Excavating, Inc. | Canby, OR | Installer | 36748 |
| Jr Kimsey Excavating, Llc | Colton, OR | Installer | 38970 |
| Juan Guevara De Jesus, Dba Tuffy Portable Toilet Company | Damascus, OR | Pumper | 36821 |
| K.R.C. Construction, Inc. | Boring, OR | Installer | 36618 |
| Kristy Lynn Lovett Dba Dirt Services | Sandy, OR | Installer | 39785 |
| Legacy Valley Llc | Molalla, OR | Installer | 39702 |
| Leroy Wallace, Dba We | Boring, OR | Installer | 39852 |
| Lil' Stinky Environmental Service Inc. | Oregon City, OR | InstallerPumper | 38231 |
| Luxury Restroom Trailers By Privy Chambers Llc, Dba Luxury Restroom Trailers By Privy Chambers | Portland, OR | Pumper | 38960 |
| Mt Hood Septic, Llc | Sandy, OR | InstallerPumper | 39132 |
| Nrc Environmental Services, Inc. | Portland, OR | Pumper | 39831 |
| Nw Woods Septic Service, Llc | Sandy, OR | InstallerPumper | 39253 |
| Oregon Underground, Inc. | Oregon City, OR | Installer | 35838 |
| Pacific Northwest Construction Llc | Molalla, OR | Installer | 39900 |
| Pacific Northwest Excavating, Llc, Dba Pacific Northwest Excavating Llc | Wilsonville, OR | Installer | 38846 |
| Pinkies Llc, Dba Pinkies | Oregon City, OR | InstallerPumper | 39961 |
| Ralston Excavating, Inc | Colton, OR | InstallerPumper | 38629 |
| Rev Excavating Llc | Hubbard, OR | Installer | 39767 |
| Reynolds Sewers Inc | Portland, OR | Installer | 39817 |
| Rg Construction & Associates, Llc | Damascus, OR | Installer | 38930 |
| Robert Guido Dinino | Beavercreek, OR | Installer | 38877 |
| Robert L. Davidson, Dba Rob Davidson Excavating | Estacada, OR | Installer | 37224 |
| Roth Zachry Heating, Inc | Canby, OR | Installer | 39415 |
| Royal Flush Services Llc, Dba Willy Make It | Portland, OR | Pumper | 39889 |
| Sandy Septic, Dba Sandy Septic | Sandy, OR | InstallerPumper | 39760 |
| Santos Labor Force, Llc | Molalla, OR | Pumper | 39165 |
| Scott Peterson Excavating, Llc | Sandy, OR | Installer | 38126 |
| Scout Septic, Grease & Drain Llc | Boring, OR | InstallerPumper | 39277 |
| Septic Medic, Inc., Dba Speedy Septic | Eagle Creek, OR | InstallerPumper | 38756 |
| Septic Solutions Llc | Sandy, OR | Installer | 39888 |
| Site Pro Llc | Molalla, OR | Installer | 39258 |
| Stolz Construction Corp | Damascus, OR | Installer | 39645 |
| The Drain Doctor'S Rooter & Septic Service Co. Llc | Colton, OR | Pumper | 36420 |
| Timco Excacation & Construction, Llc Dba Timco Septic & Excavation | Oregon City, OR | InstallerPumper | 39714 |
| Timothy James Schmautz, Dba T.J.S. Construction | Boring, OR | Installer | 39431 |
| Top Notch Home Inspection Llc | Oregon City, OR | Installer | 39454 |
| Torry L Collins, Inc, Dba Tlc Excavating & Construction | Molalla, OR | Installer | 37956 |
| Twin Peaks Construction Inc | Portland, OR | Installer | 39779 |
| United Rentals (North America), Inc, Dba Reliable Onsite Services | Portland, OR | Pumper | 39750 |
| United Site Services Of Nevada, Inc., Dba United Site Services | Clackamas, OR | Pumper | 38717 |
| Wolf Dog Construction Llc | Portland, OR | Installer | 39909 |