RE: Molalla SSO follow-up questions.

From: Jennifer Cline

Sent: Mon Jun 01 15:58:38 2015

To: PINNEY Mike; COLE David

Cc: YELTON-BRAM Tiffany; MRAZIK Steve; HYNSON Mark; J.W. Ring; Mark Strandberg; Phillip Bender; Dan Huff; Jason Clifford; jehredt@cityofmolalla.com; Sadie Cramer; Fasth, Bill

Subject: RE: Molalla SSO follow-up questions.

Importance: Normal

Hi Mike,

I’m sending you a quick note to let you know we are working on gathering Alarm and Influent Flow Data information. We will have a response to you before the end of the week of our analysis.

Regards,

Jennifer Cline, P.E.

City of Molalla

Public Works Director

O: 503.759.0218

F: 503.829.3676

"file:///C:

From: PINNEY Mike [mailto:PINNEY.Mike@deq.state.or.us]

Sent: Friday, May 29, 2015 3:14 PM

To: Jennifer Cline; COLE David

Cc: YELTON-BRAM Tiffany; MRAZIK Steve; HYNSON Mark; J.W. Ring; Mark Strandberg; Phillip Bender; Dan Huff; Jason Clifford; jehredt@cityofmolalla.com; Sadie Cramer

Subject: RE: Molalla SSO follow-up questions.

Jennifer,

You say in your response:

Q: Did the SCADA outage affect influent flow measurements?

A: Yes, when the influent backed up into the headworks and created bi-directional flows, the flow transducer in place could not accurately measure flows and recorded inaccurate readings.

Can we deduce a time when the pumps failed to run based on when the inaccurate influent flow measurement readings began?

Is there a time stamp on record when this started to happen or a reasonable time we can assume the back up of influent flow started?

This information would greatly assist in the estimation of the duration and volume of the overflow.

Thanks,

Michael Pinney PE

Senior Environmental Engineer

Oregon Department of Environmental Quality

700 NE Multnomah Ave, Suite 600

Portland OR, 97232

503 229 5310

503 229 6957 fax

From: Jennifer Cline [mailto:jcline@cityofmolalla.com]

Sent: Friday, May 29, 2015 11:52 AM

To: COLE David

Cc: YELTON-BRAM Tiffany; MRAZIK Steve; PINNEY Mike; HYNSON Mark; J.W. Ring; Mark Strandberg; Phillip Bender; Dan Huff; Jason Clifford; jehredt@cityofmolalla.com; Sadie Cramer

Subject: RE: Molalla SSO follow-up questions.

Hi David,

Please see the attached letter in response to your questions below.

Sincerely,

Jennifer Cline, P.E.

City of Molalla

Public Works Director

O: 503.759.0218

F: 503.829.3676

"file:///C:

From: COLE David [mailto:COLE.David@deq.state.or.us]

Sent: Friday, May 22, 2015 11:12 AM

To: 'Jennifer Cline'; Dan Huff; Jason Clifford; 'jehredt@cityofmolalla.com'; Mark Strandberg

Cc: YELTON-BRAM Tiffany; MRAZIK Steve; PINNEY Mike; HYNSON Mark; COLE David

Subject: Molalla SSO follow-up questions.

Hello All. First I want to thank you for taking the time to meet with Tiffany and me earlier this week to discuss the recent SSO. After considering the information you provided, we have the following additional questions:

1. At the time when Industrial Systems, Inc. installed the SCADA system, did they recommend also installing separate, back-up alarms for the pumps that failed when the SCADA system went down?
2. What are Industrial Systems’ recommendations for maintaining and checking the SCADA system? Since it was installed, have you followed the recommendations, and if so, can you produce documentation to show that you followed them?
3. When the wastewater treatment plant operators are on-call over weekends and nights, how often is the SCADA system checked, either remotely or in person, for proper operation? Does the plant Operations and Maintenance manual specify who is to perform these night and weekend checks, and how often to perform the checks?
4. Regarding the SCADA improvements: Please collect as-built plans and other engineering documents regarding this project (engineer’s reports, plans, specifications, manufacturer’s cut sheets, etc.) for DEQ review. Please contact us when they are collected and ready for our review.
5. What is the operational water level elevation in the aeration basins? What is the usual freeboard?
6. Did the SCADA outage affect influent flow measurements? If not, what was the influent volume measured over the period of the outage?
7. Per schedule B of your permit, Chlorine use and dose is measured daily. How is this done if no one is on site to do it?

Please respond to these questions no later than close of business on Friday, May 29, 2015. Thank you.

David Cole, R.G.

Water Quality Permit Compliance Specialist

DEQ Northwest Region & Western Region

2020 SW 4th Avenue

Portland, OR 97201

(T) 503-229-5011

(F) 503-229-6957

cole.david@deq.state.or.us

This spring, DEQ's Northwest Region Office will be moving to a new location - the 700 Lloyd Building at 700 NE Multnomah St., Suite #600, Portland, OR 97232. The target date for operating at the new location is May 18th, 2015.