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{'~= r p~ Former Oroville Manufactured Gas Plant Site
`""~~^"'' 7~~1 Huntoon and Montgomery Streets
C ~ J.. Y
pE Oro~ille, California
CA~~FORNIi~ December 2Q11
ORpV11.l.E,
;,~~ ~ Department of
--a~`'~~ To~c Substances
Control
Site Investigation Work Scheduled for December 2011- January 2012
The Department of Toxic Substances Control (DTSC) would like to inform you of a second phase of work that
will be performed by Pacific Gas and Electric Company (PG&E) as part of an environmental site investigation in
downtown Oroville. From 1878 until 1927, a manufactured gas plant (MGP) operated in Oroville in the area of
Huntoon and Montgomery Streets. PG&E acquired the plant in 191fi and operated it until 1927. PG&E
removed a large gas holder from the site in 1958, and sold the former gas plant properties to the City of
Oroville in 1964. The City uses the properties for a parking lot and the storm water pumping station.
Contractors working on behalf of PG&E will collect samples of soil, soil gas (the air found in the soil), and
groundwater in and around the former gas plant site. The work will help define the extent of any impacts that
may have been caused by former MGP operations and determine if any cleanup will be needed. All work will
be coordinated closely with the City of Oroville and local merchants to minimize or avoid disrupting local
businesses and community events. In December 2011 contractors will begin site preparation work with
sampling activities to start in early January, 2012.
Planned Work: Work will begin take place from 7:00 a.m. to 5:00 p.m., Monday through Friday. All work will
be done in accardancewith aproject-specific Health and Safety Plan. In addition, an environmental site
manager will be on-site daily to manage and `oversee the work.
Dates Activity What you can expect to see and Potential impacts
hear
December, 2011 Survey layout, underground A crew of 2- 3 workers will survey the site Portions of the parking lot will
utility clearance and marking of to locate specific sampling locations and be blocked off during these
work areas. identify underground piping and other activities but there will still be
features using portable equipment. ample parking available.
Work areas where boreholes will be
drilled will be marked on the pavement
of the parking lot .
January, 2012 Soil sampling A crew of 2- 3 workers will drill boreholes During a 10 day period the sonic
through pavement to depths of 5 to 35 drilling will create noise. We
feet using atruck-mounted drill rig. have received a variance to the
Some hand drilling will also be City of Oroville noise ordinance
performed. Soil samples will be collected to conduct this work and will try
from boreholes for chemical testing. very hard to work quickly and
Boreholes will be backfilled and patched limit impacts.
to match the surrounding area.
A small portion of the parking
lot will be blocked off during this
activity but there will be ample
parking available.
January, 2012 Soil gas probes installation and Afield crew of 2- 3 workers will drill to a The parking lot will remain
soil gas sampling depth of 15 feet using hand equipment apen.
and atruck-mounted drill rig. Soil gas
samples will be collected and boreholes
will be covered with metal plates that are
flush with the ground's surface and
bolted in place.
January, 2012 Groundwater well installation Afield crew of 2- 3 workers will install A small portion o#the parking
and sampling tour shallow groundwater monitoring lot:will be blacked off during this
wells using struck-mounted drill rig. activity b~utthereawill be ample
Groundwater wells will be covered with parking available.
metal plates that are flush with the
ground's surface and bolted in place.
Groundwater will be sampled after wells
are installed.
For More In#ormation: ]f you have questions about this project please call:
• Tedd Yargeau, DTSC Project Manager, at (818} 212-5340 or by email: tyarteauCa~dtsc.ca.~ov
• Veronica Lopez-Villasenor, DTSC Public Participation Specialist, Toll Free at - (866) 495-5651 or
~916y 255-3651 or by email: vlopezvi@dtsc.ca.gov.
Where to Find Project Documents: DTSC encourages you to review the initial site investigation work plan and
other site-related documents which are available at the information repositories listed below:
Oroville Public Library
1820 Mitchell Avenue
Oroville, CA 95966
1±530) 538-7541
Reference Desk
DTSC -File Room
$800 Cal Center Drive
Sacramento, CA 95826
(916) 255-3779
To find information on the web,
please visit the following site:
www.envirostor.dtsc.ca.~ov
All documents made available to the public by DTSC can be provided in alternate formats (i.e. Braille, large
print, etc.) or in another language as appropriate, in accordance with State and Federal law. Please contact
Veronica Lopez-Villasenor, as noted above, for assistance.
~~~ Printed on recycled paper