Hickey-Hydroscience Emails - GridleyLeaks

Alvin.Davis
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Rob
Dave Dauwalder
Friday, September 16, 2011 2:40 PM
Rob Hickey
Alvin Davis; Bill Slenter
RE: recommendation
The polishing pond should be the first priority. If Rio Pluma or the City want to try the enzyme, this may help on the
aerated pond.
DAV~D DAUWALDER
Senior Project Manager
HydroScience Engineers IStrategic Water Solutions
10569 Old Placerville Road
Sacramento, CA 95827
T: 916.364.1490 ext. 1371 F: 916.364.1491
www.hydroscience.com
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From: Rob Hickey [mailto:mickey@gfidley.ca.us]
Sent: Friday, September 16, 20112:34 PM
To: Dave Dauwalder
Cc: Alvin Davis; Bill Slenter
Subject: RE: recommendation
It would seem that getting the ponds dredged is the best option at this point (?). Should we get both or just the
polishing pond?
Thanks,
Rob
From: Dave Dauwalder [mailto:ddauwalder@hydrosdence.com]
5ent~ Friday, September 16, 2011 12:33 PM
To: Rob Hickey
Cc: Alvin Davis; Bill Slenter
Subject: recommendation
Rob
Bill just left you a voicemail regarding this recommendation. At this point, Alvin has sufficient documentation to believe
Rio Pluma has violated their discharge permit in the following two major ways:
~ changing the TSS sampler code and accessing the TSS sampler; and
~ collecting and storing TSS samples themselves versus the permit requirement that only the City and certified lab
control the chain of custody
Thus, the data from Rio Pluma is not reliable or valid, as documented in City acquired grab sampling. Routinely, Rio
Pluma has exceeded their discharge limit of 200 mgll for TSS. This week the City has again locked down the sampling
equipment and has taken control of their chain of custody.
In order to protect the City from potential violations of the City's discharge permit and possible fines, we recommend that a
Notice of Violation be issued to Rio Pluma as soon as possible. This will serve three main purposes:
1