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

[Ted Kochanski]

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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