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Old 12-14-2017, 04:04 PM   #61
Joel N. Weber II
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Re: Quabbin Fishing

http://www.mass.gov/eea/docs/dcr/wat...oatsealfaq.pdf claims that a motor used on a private boat for fishing in the Quabbin must have enough gas to run for five minutes during the Boat Decontamination process. Is there some reason they're trying to ban battery powered motors like those described at https://www.torqeedo.com/us/en-us ?
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Old 12-16-2017, 03:47 PM   #62
dwash59
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Re: Quabbin Fishing

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Originally Posted by Joel N. Weber II View Post
http://www.mass.gov/eea/docs/dcr/wat...oatsealfaq.pdf claims that a motor used on a private boat for fishing in the Quabbin must have enough gas to run for five minutes during the Boat Decontamination process. Is there some reason they're trying to ban battery powered motors like those described at https://www.torqeedo.com/us/en-us ?
They just want your motor to run long enough to flush the water through your engine for long enough to do the decontamination. They wouldn't have any issues with you showing up with a battery powered motor, as long as it has enough juice to do the decontamination.
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Old 12-16-2017, 04:07 PM   #63
Joel N. Weber II
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Re: Quabbin Fishing

So can they come up with wording that acknowledges the possibility of a battery powered motor?

Would it be worthwhile to phase out gas motors on the Quabbin entirely in favor of battery powered motors?
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Old 12-30-2017, 02:39 PM   #64
Joel N. Weber II
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Re: separated storm drains

Where we have separated storm drains, are they set up to never ever send anything to Deer Island?

When there's road salt finding its way into the storm drains, it seems like trying to keep that out of the fresh water rivers might be worthwhile if there happens to be spare capacity to Deer Island.

And at the very start of rainfall when motor oil and leaves may be more likely to get mixed in with the rain water, keeping that stuff out of the rivers might again have some value.
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Old 01-02-2018, 09:43 PM   #65
stellarfun
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Re: separated storm drains

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Originally Posted by Joel N. Weber II View Post
Where we have separated storm drains, are they set up to never ever send anything to Deer Island?

When there's road salt finding its way into the storm drains, it seems like trying to keep that out of the fresh water rivers might be worthwhile if there happens to be spare capacity to Deer Island.

And at the very start of rainfall when motor oil and leaves may be more likely to get mixed in with the rain water, keeping that stuff out of the rivers might again have some value.
I am no expert on the sewer system configurations of Greater Boston, but speaking generally, in a separated sewer system (consisting of a sanitary sewer and a storm sewer) the flow in a storm sewer would not be sent to a sewage treatment plant before being discharged into the harbor or a river.

The old configuration relied on combined sewers, where sanitary flows were mixed with stormwater flows in the same sewer, and the combined flow sent either to a treatment plant, or discharged into the harbor without any treatment at all.

Treatment plants are not sized to treat peak stormwater flows, so there are overflow points (diversion chambers) along the length of a sewer that send a portion of the flow in a combined sewer directly into the harbor or river without treatment. Overflows occur during storm events. One inch of rain on one acre is equal to about 27,500 gallons. One can appreciate the scaling problem if that rain fell on an impervious surface and flowed directly into a combined sewer.

There are various technologies that can be used to reduce pollution from highway runoff from reaching an environmentally sensitive water body. However, these are impractical on a large scale, and would be wildly expensive. There are areas where use of road salt is prohibited because of environment concerns if runoff with the salt were to reach an environmentally sensitive water body.

Finally, the greatest concern with respect to stormwater runoff being discharged by a storm sewer into a freshwater river or lake are the nutrients (fertilizer etc) in the runoff.

http://www.cleveland.com/metro/index..._continue.html
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Old 01-03-2018, 11:50 AM   #66
Joel N. Weber II
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Re: separated storm drains

We do have some storage infrastructure in the combined sewer overflow processing in the Boston area; the Cottage Farm facility can store 1.3 million gallons according to https://magazinebeach.org/2013/10/22...eatment-plant/

There's also https://en.wikipedia.org/wiki/South_...Storage_Tunnel

If over the course of the next several decades we manage to fully separate the storm drains, it seems like there would probably be some value in continuing to use the existing storage facilities to reduce the amount of polluted water the storm drains send into rivers.
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Old 02-28-2018, 09:37 AM   #67
Joel N. Weber II
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Tesla batteries and water systems

https://electrek.co/2018/02/28/tesla...epayers-money/ discusses how Irvine Ranch Water District in California expects to save money by installing Tesla batteries; could MWRA save money in a similar fashion?
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