[Lex Computer & Tech Group/LCTG] COVID levels in wastewater

Mon Jan 16 15:47:45 PST 2023

There is a lot of information available on Lexington's stormwater
management.  A good place to start is
https://www.lexingtonma.gov/277/Stormwater-Management .
Unfortunately, the GIS map does not seem to be working.

Al

On Tue, Jan 17, 2023 at 11:27 AM Ted Kochanski <tedpkphd at gmail.com> wrote:

> Frank,
>
> I may be ignorant of some things -- no doubt
>
> However -- if you collect water from run-off -- it has to go somewhere
> Either you dump it into a local water course or you carry it onward to a
> more remote water course and then you dump it
> To the best of my understanding we are not dumping our surface water
> anywhere along the way as that would be a violation of many regulations due
> to the oil, and other street waste which has to be treated before you dump
> it
>
> When I lived in Austin Texas there were developments in
> unincorp[orated territory on the periphery of the City of Austin hoping one
> day to become annexed.  The developers procured "packaged Treatment plants"
> to process the runoff before dumping it into local creels and dry creekbeds
> These packaged plants were separate from the variou means including septic
> tanks and leaching fields used to handle the sanitary waste from the homes
> in the subdivisions
>
> Lexington has had a sewer system for quite a while and it connect into the
> MWRA's major sewer interceptors which typically run alongside rivers and
> streams before ultimately being processed @ Deer Island and dumped into
> Massachusetts Bay beyond Winthrop
>
> I found this on a Google search of MWRA Lexington sewer
> its from a presentation on updates to the 2018 MWRA Master plan  --
> apparently presented to some official body February 12, 2019
>
> https://www.mwra.com/monthly/wac/presentations/2019/021219-masterplan-widescreen.pdf
>
> $73M Programmed in CIP FY19‐28 for Pump
> Station/CSO Facility Rehabilitations
> *― Alewife PS (in construction)*
> ― Castle Island PS
> ― Cottage Farm CSO
> ― Prison Point CSO
> ― Preliminary Design for Next
> 5 Older Facilities
>
> There is a photo of the Alewife pump station and a high-level system map
> showing the interceptor connecting through Arlinton to Lexington
>
>
> However -- despite my spending over 30 minutes searching -- It's actually
> quite difficult to track down much on the MWRA sewer system
>
> Perhaps we should get someone inside the MWRA to talk to us about it
>
> Ted
>
>
>
> On Mon, Jan 16, 2023 at 8:19 AM Frank Sandy <fsandy9 at comcast.net> wrote:
>
>>     The sewer system and the storm water drainage system are completely
>> separate in Lexington.   Older systems in some other communities are still
>> partially combined.  However, even in Lexington, there are some people that
>> illegally connect their sump pumps to their toilets and the Town's sewer
>> system.
>>
>> Frank Sandy
>>
>> On 1/15/2023 8:44 PM, Bill Haley wrote:
>>
>> As far as I know the storm water run off system is not connected to the
>> waste water treatment system.
>>
>> Bill
>>
>> On Sun, Jan 15, 2023 at 11:44 AM Ted Kochanski <tedpkphd at gmail.com>
>> wrote:
>>
>>> John,
>>>
>>> There is a big problem with this data being compared over long periods
>>> of time
>>> Some of the waste water includes surface run-off and some mostly doesn't
>>> hence, since the y axis is a concentration of virus in the water -- if
>>> the amount of "active water" from households is diluted by surface run-off
>>> because of recent rain or even more complicating melting snow mixed with
>>> recent rain -- how can you tell?
>>>
>>> I suggest that the data suggests that last year there was a real spike
>>> and that recently there is just "noise" in the system
>>>
>>> Ted
>>>
>>>
>>> On Fri, Jan 13, 2023 at 8:17 PM <jjrudy1 at comcast.net> wrote:
>>>
>>>> Don’t worry about the y-axis, just the shape of the curve.  The article
>>>> gave no indication as to what is “good”.  In the later graph look at the
>>>> winter spikes.  The big problem was a year ago.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> John Rudy
>>>>
>>>>
>>>>
>>>> 781-861-0402
>>>>
>>>> 781-718-8334  cell
>>>>
>>>> 13 Hawthorne Lane
>>>> <https://www.google.com/maps/search/13+Hawthorne+Lane+Bedford+MA?entry=gmail&source=g>
>>>>
>>>> Bedford MA
>>>> <https://www.google.com/maps/search/13+Hawthorne+Lane+Bedford+MA?entry=gmail&source=g>
>>>>
>>>> jjrudy1 at comcast.net
>>>>
>>>>
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