2007-11-20_REVISION - M1982015 ‎(19)‎

• Permit No: M1982015
• IBM Index Class Name: REVISION
• Doc Date: 11/20/2007
• Doc Name: Appendix 1, Email Correspondence
• From: E-21 Engineering, Inc.
• To: DRMS
• Type & Sequence: TR3
• Media Type: D
• Archive: No

Page I of 2
BRIAN WOODY
From: "Teresa J Bennett" <[e-mail]>
To: "Brian Woody" <[e-mail]>; <[e-mail]>
Cc: "WALTER Avramenko" <[e-mail]>; "'Sergius Hanson<serge@e-
21engineering.com>; Steven Artman<[e-mail]>; "'Vinod Jayaram"'
<[e-mail]>; "'PC Norm Higley "' <[e-mail]>; "Teresa J Bennett"
<[e-mail]>; "'Chris Morley -- Vertex"' <[e-mail]>;
Don D'Amato - Vertex<[e-mail]>; "'Warren Maierhofer -- Vertex
<[e-mail]>
Sent: Tuesday, February 06, 2007 4:49 PM
Subject: Re: Bayshore ICSP Addendum - waste mgt plan west of break
Brian,
I have taken a quick look at this. Just a few comments for the west
(presumed nonhazardous) trench excavation:
1. It does not sound like you will excavate below the water table. If
you were to get into saturated soils while excavating, then any
groundwater that may be contaminated above State groundwater standards
would need to be contained and not allowed to run and drain onto the
ground surface.
2. Please increase the confirmation soil sampling following excavation
to a frequency of every 50 feet along each of the sidewalls, and every
50 feet along the bottom of the excavation for BTEX analysis, along with
the ones from each end of the excavation. Since these soil samples will
be used to potentially get a no further action determination on the soil
here, I need a few more samples.
3. I concur with PID screening as you excavate, as there may be pockets
of "hotter" material encountered, especially as you near the release
point. I also concur with then sampling this "hotter" material if you
encounter it. You state that you will sample any material showing PID
results over 200 ppm and less than 1000 ppm. But what is your intent if
the PID results are greater than 1000 ppm (i.e, why the cap)?
4. Just be aware that if you run into "hot" soils and take the BTEX
sample (1-2 hour verbal results), and then excavate/dispose as solid
waste prior to receiving the TCLP results, if the TCLP results fail,
then you run the risk of not having made a proper haz waste
determination and illegal disposal. You may want to hold these "hot"
soils in a lined roll-off until the TC results come back.
Otherwise, good to go on this portion. I agree with removing these
materials as further assurance that no source material is being left
behind that could further impact groundwater. Please contact me if any
questions at 303-692-3376. I won't be in tomorrow, but will
check/return messages periodically.
Thanks, Terry
>>> "Brian Woody" <[e-mail]> 02/06/07 1:43 PM >>>
Teresa,
I have attached the waste management plan to haul non-hazardous
impacted
6/9/2007