WEBVTT

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>> My name is Charlotte Churin and
I'm and environmental scientist

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at a small environmental consulting firm.

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So the majority of what I do is involving
the water quality monitoring that we do

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for developers primarily in Montgomery County.

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So they have certain requirements that they have

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to follow during construction
and after construction.

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My day is pretty much different every day I
come to work which is -- I really enjoy that.

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This is the flow meter.

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This is the flow rod.

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When we get down there I'll hook them
up and the flow rod goes into the stream

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and the flow meter gives you the velocity
of the water as it is coming through.

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Prior to construction on these sites we
installed ground water wells and we have to go

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out and check the level every month.

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We have two tank flow readings which, in
certain streams on the site which sort

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of helps us gauge how much water is coming
through the streams which can increase

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when there is an increase in pervious
surface and that sort of thing.

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We do storm sampling so during rain events
we'll gather our water samples at various BMP's

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which are best management practices.

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And during construction those
are like sediment traps.

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So there's, you know, as they're grading
the land there's a lot of dirt being moved

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around basically and during rain events
that can be washed into waterways

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so they put these sediment basins on there
that are supposed to capture the majority

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of the runoff and the sediment and
let the sediment sort of filter

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out before the water is discharged
into the stream.

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So we have to capture the amount of
water coming in and what's going out.

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And then we sample that for sediment and then

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in post construction we also sample
for pollutants and nutrients.

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So heavy metals and things like that.