Hi Mitch,
I will need to get back to you on the whether an oil/water separator is sufficient. However, I have a bigger concern with an open pad draining to the sanitary system. An open drain allows rain and storm water to flow directly to the treatment plant which is considered an Infiltration/Inflow (I/I) violation. The wash, if permitted, would definitely need to be covered and designed to flow storm water away from the pad.
Second, I am also concerned that your well has not been decommissioned. Unless you property is in the county, I believe you are required to be connected only to City water services.
The offices are closed today for Veteran’s Day, so I will discuss your questions with Nicholas tomorrow.
Jennifer Cline, P.E. | Public Works Director
Licensed in OR, WA
117 N Molalla Ave. | PO Box 248 * |Molalla, OR 97038
O: 503.759.0218 | F: 503.829.3676
From: Mitch Jorgensen [mailto:mjj@molalla.net]
Sent: Wednesday, November 11, 2015 9:26 AM
To: 'Jennifer Cline' <jcline@cityofmolalla.com>
Subject: New Hot Pressure Washer Pad
We’re going to install a wash area next to our new shop. We propose to use an oil/water separation system and discharge the remaining effluent to the city’s sanitary sewer system. We also propose to use our well water system to supply the needed water for this, so the only demand on city resources would be the discharge from this wash pad via the oil/water separator. We anticipate the use to be 0 to 7 washes/month; so not a heavy demand.
Would this be an allowable use? If not, what would we need to do to make it so?
Mitch Jorgensen, Pres.
QCT/CCT #44362
Molalla Redi-Mix & Rock Products, Inc.
PO Box 555
Molalla, Or 97038
(503) 829-5555 x 15 office
(503) 829-5558 fax
(503) 969-3377 cell
Online at molallaredimix.com