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<div dir="ltr" data-setdir="false">I live in Waltham. In older parts of our City there are plenty of combined storm and sanitary sewers. There are also communities where in heavy rain events there are still combined sewer overflows resulting in mixed sewage and runoff being discharged into waterways, including the Charles River. The Charles River Watershed Association (CRWA) has been campaigning to get rid of these combined sewers and reduce or eliminate combined overflows, and this effort is ongoing. </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">So it is true that runoff can dilute the data on sewage and its contents. This may be relevant to COVID counts in wastewater sampling, and should be considered when referring to this data set. </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">In spite of this factor, I still do believe there is sufficient evidence in the data set to say with confidence that there was a spike in COVID counts over this winter, and that this spike is now declining. If this trend continues, this could be good news for those like myself who are still hesitant to attend live indoor gatherings or meetings where masks are not being required. </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I will continue to monitor the data and to make decisions based on the best evidence available, as well as considering official guidance and scientific and medical advice.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Thanks for bringing attention to this aspect of the wastewater data, Ted. </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">-- Bob Primak </div><div dir="ltr" data-setdir="false"><br></div><div><br></div>
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On Monday, January 16, 2023 at 05:26:21 PM EST, Ted Kochanski <tedpkphd@gmail.com> wrote:
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<div><div id="yiv1025227500"><div><div dir="ltr"><div dir="ltr"><font size="4">Frank,</font><div><font size="4"><br clear="none"></font></div><div><font size="4">I may be ignorant of some things -- no doubt</font></div><div><font size="4"><br clear="none"></font></div><div><font size="4">However -- if you collect water from run-off -- it has to go somewhere</font></div><div><font size="4">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</font></div><div><font size="4">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</font></div><div><font size="4"><br clear="none"></font></div><div><font size="4">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</font></div><div><font size="4">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</font></div><div><font size="4"><br clear="none"></font></div><div><font size="4">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</font></div><div><font size="4"><br clear="none"></font></div><div><font size="4">I found this on a Google search of MWRA Lexington sewer</font></div><div><font size="4">its from a presentation on updates to the 2018 MWRA Master plan -- apparently presented to some official body February 12, 2019</font></div><div><font size="4"><a rel="nofollow noopener noreferrer" shape="rect" target="_blank" href="https://www.mwra.com/monthly/wac/presentations/2019/021219-masterplan-widescreen.pdf">https://www.mwra.com/monthly/wac/presentations/2019/021219-masterplan-widescreen.pdf</a><br clear="none"></font></div><div><font size="4"><br clear="none"></font></div><div><font size="4">$73M Programmed in CIP FY19‐28 for Pump<br clear="none">Station/CSO Facility Rehabilitations<br clear="none"><b>― Alewife PS (in construction)</b><br clear="none">― Castle Island PS<br clear="none">― Cottage Farm CSO<br clear="none">― Prison Point CSO<br clear="none">― Preliminary Design for Next<br clear="none">5 Older Facilities<br clear="none"></font></div><div><br clear="none"></div><div><font size="4">There is a photo of the Alewife pump station and a high-level system map showing the interceptor connecting through Arlinton to Lexington</font></div><div><br clear="none"></div><div><br clear="none"></div><div><font size="4">However -- despite my spending over 30 minutes searching -- It's actually quite difficult to track down much on the MWRA sewer system</font></div><div><font size="4"><br clear="none"></font></div><div><font size="4">Perhaps we should get someone inside the MWRA to talk to us about it</font></div><div><font size="4"><br clear="none"></font></div><div><font size="4">Ted</font></div><div><font size="4"><br clear="none"></font></div><div><font size="4"><br clear="none"></font></div></div><br clear="none"><div class="yiv1025227500gmail_quote"><div id="yiv1025227500yqt10836" class="yiv1025227500yqt6463174276"><div dir="ltr" class="yiv1025227500gmail_attr">On Mon, Jan 16, 2023 at 8:19 AM Frank Sandy <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:fsandy9@comcast.net" target="_blank" href="mailto:fsandy9@comcast.net">fsandy9@comcast.net</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="yiv1025227500gmail_quote">
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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.<br clear="none">
<br clear="none">
Frank Sandy<br clear="none">
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<div>On 1/15/2023 8:44 PM, Bill Haley wrote:<br clear="none">
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<div>As far as I know the storm water run off system is
not connected to the waste water treatment system.</div>
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<div>Bill</div>
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<div dir="ltr" class="yiv1025227500gmail_attr">On Sun, Jan 15, 2023 at
11:44 AM Ted Kochanski <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:tedpkphd@gmail.com" target="_blank" href="mailto:tedpkphd@gmail.com">tedpkphd@gmail.com</a>>
wrote:<br clear="none">
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<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="yiv1025227500gmail_quote">
<div dir="ltr">John,
<div><br clear="none">
</div>
<div>There is a big problem with this data being compared
over long periods of time</div>
<div>Some of the waste water includes surface run-off and
some mostly doesn't</div>
<div>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?</div>
<div><br clear="none">
</div>
<div>I suggest that the data suggests that last year there
was a real spike and that recently there is just "noise"
in the system</div>
<div><br clear="none">
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<div>Ted</div>
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<div class="yiv1025227500gmail_quote">
<div dir="ltr" class="yiv1025227500gmail_attr">On Fri, Jan 13, 2023 at
8:17 PM <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:jjrudy1@comcast.net" target="_blank" href="mailto:jjrudy1@comcast.net">jjrudy1@comcast.net</a>>
wrote:<br clear="none">
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<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="yiv1025227500gmail_quote">
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<div lang="EN-US">
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<p class="yiv1025227500MsoNormal"><span style="font-size:16pt;font-family:Arial, sans-serif;">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.</span></p>
<p class="yiv1025227500MsoNormal"><span style="font-size:12pt;font-family:Arial, sans-serif;"> </span></p>
<p class="yiv1025227500MsoNormal"><img src="cid:FglFWzU8Msy45rAxzusP" yahoo_partid="1.2" style="width:1112px;max-width:100%;"><span style="font-size:12pt;font-family:Arial, sans-serif;"></span></p>
<p class="yiv1025227500MsoNormal"><span style="font-size:12pt;font-family:Arial, sans-serif;"> </span></p>
<p class="yiv1025227500MsoNormal"><img src="cid:fb09agWhcfm35yyG2c1S" yahoo_partid="1.3" style="width:1112px;max-width:100%;"><span style="font-size:12pt;font-family:Arial, sans-serif;"></span></p>
<p class="yiv1025227500MsoNormal"><span style="font-size:12pt;font-family:Arial, sans-serif;"> </span></p>
<p class="yiv1025227500MsoNormal"><span style="font-size:10pt;font-family:Arial, sans-serif;">John
Rudy</span></p>
<p class="yiv1025227500MsoNormal"><span style="font-size:10pt;font-family:Arial, sans-serif;"> </span></p>
<p class="yiv1025227500MsoNormal"><span style="font-size:10pt;font-family:Arial, sans-serif;">781-861-0402</span></p>
<p class="yiv1025227500MsoNormal"><span style="font-size:10pt;font-family:Arial, sans-serif;">781-718-8334
cell</span></p>
<p class="yiv1025227500MsoNormal"><span style="font-size:10pt;font-family:Arial, sans-serif;"><a rel="nofollow noopener noreferrer" shape="rect" target="_blank" href="https://www.google.com/maps/search/13+Hawthorne+Lane+Bedford+MA?entry=gmail&source=g" style="font-family:Arial, sans-serif;">13 Hawthorne Lane</a></span></p>
<p class="yiv1025227500MsoNormal"><span style="font-size:10pt;font-family:Arial, sans-serif;"><a rel="nofollow noopener noreferrer" shape="rect" target="_blank" href="https://www.google.com/maps/search/13+Hawthorne+Lane+Bedford+MA?entry=gmail&source=g" style="font-family:Arial, sans-serif;">Bedford MA</a></span></p>
<p class="yiv1025227500MsoNormal"><span style="font-size:10pt;font-family:Arial, sans-serif;"><a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:jjrudy1@comcast.net" target="_blank" href="mailto:jjrudy1@comcast.net" style="font-family:Arial, sans-serif;">jjrudy1@comcast.net</a></span></p>
<p class="yiv1025227500MsoNormal"><img src="cid:vNzr0al7PB2FJKhuXUeL" yahoo_partid="1.4" style="width:248px;max-width:100%;" border="0"><span style="font-size:10pt;font-family:Arial, sans-serif;"></span></p>
<p class="yiv1025227500MsoNormal"> </p>
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