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

[Alan Millner]

Street runoff in our part of Lexington definitely goes into the local streams and swamps.

Alan Millner
amillner at alum.mit.edu
781-862-7893
48 North St., Lexington MA 02420



On Jan 16, 2023, at 6:47 PM, Allan Sherman <allanpsherman at gmail.com> wrote:

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 <mailto: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 <mailto: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 <mailto: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 <mailto: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.
>>>>> 
>>>>>  
>>>>> <image001.png>
>>>>> 
>>>>>  
>>>>> <image002.png>
>>>>> 
>>>>>  
>>>>> 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 <mailto:jjrudy1 at comcast.net>
>>>>> <image003.png>
>>>>> 
>>>>>  
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