From: Gerald Fisher
Sent: Mon Aug 28 16:43:39 2017
To: Jimmy Thompson
Cc: Elizabeth Klein; Dan Huff
Subject: RE: Water/Sewer opportunity
Importance: Normal
Microsoft Exchange Server;converted from html;
Hi Jimmy,
Low flow tanks have been in effect since the 2000's or 1990's. I think the best use of the money would be towards fixing the collection system. If folks want to reduce water consumption by purchasing tank banks then they can do that. The issue is I&I. Our plant goes from 1 MGD typical flows to between 3 MGD to 6 MGD depending on the level of storm event. An effective system is as follows:
1. Start with sealing out the groundwater by replacing or lining the sewer mains and laterals.
2. Force disconnection of downspouts from sewers
3. Force replacement of sewer laterals from the street to the house.
That will take care of over 90% of the water getting into our system. There are others that need to be investigated such as storm mistakenly connected to the sewer system years ago.
Regards,
Gerald Fisher, P.E. | Public Works Director
City of Molalla
117 N Molalla Ave. | PO Box 248 |Molalla, OR 97038
Office: 503.829.6855 | Direct: 503.759.0218
CONFIDENTIALITY NOTICE: The information contained in this email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient and have received this communication in error, please contact the sender by reply email and destroy all copies of the original message. Thank you.
-----Original Message-----
From: Jimmy Thompson [mailto:jthompson@cityofmolalla.com]
Sent: Monday, August 28, 2017 3:03 PM
To: Gerald Fisher gfisher@cityofmolalla.com>
Cc: Elizabeth Klein ; Dan Huff
Subject: Water/Sewer opportunity
Gerald,
Elizabeth had mentioned that perhaps there would be a benefit in so far as reducing the load on the sewer system by providing some sort of incentive for high efficiency toilets. I think most of our toilets would be new enough they would be the 1.6 gallon models, but I am sure there are some older ones around. Toilets can be expensive, in some cases even more than a few hundred dollars, making a return on investment take quite some time to materialize. Tank Banks on the other hand can reduce the water used to flush by 0.8 gallons, are simple to use, and only about $3.00 each.
We have made some significant increases to the water and sewer rates. They are separate, but, sewer rates are an average of the water consumption. Would there be any benefit to the city purchasing tank banks for citizens and giving them away to citizens? Kind of a win/win in helping citizens reduce their bills and reducing the load on the system.
It is a stretch perhaps, but if the average person flushes 5 times per day, saves 0.8 gallons per flush, that is 1,460 gallons saved per year per person; 14,600,000 gallons total per year for the 10,000 people in town. Even if the effort only produced a reduction in the load of 10,000,000 gallons, 2 of those tank banks per household would be about $5,600. Would such a reduction be significant enough to be of benefit to the operation?
Jimmy