Hickey-Hydroscience Emails - GridleyLeaks

Alvin Davis
:rom:
Sent
To:
Cc:
Subject:
Rob
Dave Dauwalder
Friday, September 16, 2011 2:32 PM
Rob Hickey
Alvin Davis; Bill Slenter; Jack Grossman
RE: recommendation
Ok. We will draft one on Monday, which will refer to specific items in their permit.
DAVID OAUWALDER
Senior Project Manager
HydroScience Engineers IStrategic Water Solutions
10569 Old Placerville Road
Sacramento, CA 95827
T: 916.364.1490 ext. 137! F: 916.364.1491
www.hydroscience.com
From: Rob Hickey [mailto:rhicKey@gridley.ca.us]
Sent: Friday, September 16, 2011 2:25 PM
To: Dave Dauwalder
Cc: Alvin Davis; Bill Slenter
Subject: RE: recommendation
Would you please draft a proper notice?
Thanks,
Rob
from: Dave Oauwalder [mailto:ddauwalder@hydrosdente.com]
Sent: Friday, September 16, 201112:33 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 mglt for TSS. This week the City has again locked down the sampling
squipment 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 possib1e fines, we recommend that a
Notice of Violation be issued to Rio Pluma as soon as possible. This will serve three main purposes: .
1