From: Andy Peters

Sent: Tue Jun 12 11:07:27 2018

To: Gordon.munro@tetratech.com; charlie.macpherson@tetratech.com

Cc: Gerald Fisher; Jake Ehredt; Dan Huff

Subject: Molalla WWTP

Importance: Normal

Attachments: AsBuilts.pdf; 2018-06-07 looking for vault 2.jpg;

 

Good Morning Gordon,

Charlie, if this email should go to someone else at Tetra Tech would you please route for me?

My name is Andy Peters, Ops Supervisor for the City of Molalla. Tetra Tech and KCM performed a project on our Waste Water Plant in 2007 (Tetra Tech project 3530029). We’ve ran into a situation where we are unable to properly determine our plant flows. According to the As Built drawings from this 2007 project there is supposed to be a Vault with an Insertion Mag-meter at this plant, but we can’t find it. This is important, and DEQ is involved. Can you help me by seeing if anyone on this project has living memory? As the image attached shows, we’ve dug and dug, but can find no vault. Likewise no previous operator has knowledge of it.

Attached As-builts show:

    1. a. Sheet 9 of 83 shows “Flow Meter #6 MH” which was supposed to have been installed in a vault 23’ off the face of the new building.
    2. b. Sheet 12 of 83 details the vault and specifies a “Multi Point Insertion Mag Meter”.
    3. c. Sheet 66 of 83 details the electrical for it.
    4. d. Sheet 17 of 83 details the installation of the mag meter itself.
    5. e. There is indeed a wall mounted receiver for a flow meter in the Effluent Pump House where this Mag Meter’s readout was suppose to be located per sheet 66. This physical box is labeled FIT-200 and titled “CCB Influent Flow Meter”. It was clearly installed in 1999 as part of the construction of the building, and is shown on those as-builts. The Scada programs going back in time have registers allocated to this FIT-200, but those registers have never been assigned to any input or output on any PLC that we can find. In short, I’m concerned the Vault and Mag Meter planned in 2007 was never installed?

Thank you!

Andy Peters

City of Molalla

Public Works Operations Supervisor

(503) 829-6855 x220

Cell: 503-793-0507

apeters@cityofmolalla.com

117 N Molalla Ave

Molalla, OR 97038