"file:///C:From: Jennifer Cline
Sent: Fri Jun 26 09:31:23 2015
To: Randy Bos
Cc: Jason Clifford
Subject: FW: Molalla pH monitoring data
Importance: Normal
Hi Randy,
Will you please provide the info on calibration frequency. I believe I have the other info in your quote for the work.
Jennifer Cline, P.E.
City of Molalla
Public Works Director
O: 503.759.0218
F: 503.829.3676
From: COLE David [mailto:COLE.David@deq.state.or.us]
Sent: Friday, June 26, 2015 9:10 AM
To: 'Jennifer Cline'
Cc: Jason Clifford; 'Christine Hein'; COLE David; PINNEY Mike
Subject: RE: Molalla pH monitoring data
Hello Jennifer. Thanks for the data table and comparison graph.
Please give me a schematic and/or verbal description of exactly where and how you plan to install the pH meter at the headworks. What is the make and model of the instrument? Also, what are the manufacturer’s recommendations regarding calibration frequency when the meter is used for continuous measurements? Thank you.
From: Jennifer Cline [mailto:jcline@cityofmolalla.com]
Sent: Friday, June 26, 2015 8:59 AM
To: COLE David
Cc: Jason Clifford; 'Christine Hein'
Subject: Molalla pH monitoring data
Hi David,
The City will be moving forward with the permanent installation of the pH probe at the Headworks for continuous monitoring. As you can see in the attached .pdf the pH meter values are tracking very close to the grab sample pH value. If you have any comment or questions before we move forward with the permanent installation, please let me know.
Sincerely,
Jennifer Cline, P.E.
Public Works Director
117 N Molalla Ave.
PO Box 248 *
Molalla, OR 97038
O: 503.759.0218
F: 503.829.3676
"