HomeMy WebLinkAboutAgenda Report - October 15, 2014 C-05AGENDA ITEM c-5
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AGENDA TITLE:
MEETING DATE:
PREPARED BY:
Approve Plans and Specifications and Authorize Advertisement for Bids for
Northern Plume Monitoring Well lnstallation Project
October 15,2014
Public Works Director
RECOMMENDED ACTION Approve plans and specifications and authorize advertisement for
bids for Northern Plume Monitoring Well lnstallation Project.
BACKGROUND INFORMATION: The Lodi Noñhern Plume - Hydrogeology and Groundwater
Monitoring, Proposed Northern Plume Monitoring Well Location
Technical Memorandum was prepared June 2014 by Langan
Treadwell Rollo and submitted to the RegionalWater Quality Control Board (Board) for review and
approval. The technical memorandum discussed past investigations in the Northern Plume area and
proposed the location for the first monitoring well in the Northern Plume area.
The Northern Plume is bounded by Turner Road to the north, Washington Street to the east,
Pleasant Avenue to the west and Elm Street to the south, as depicted in Attachment A. Previous
investigations have shown the TCE/PCE concentrations were detected at the levels 250 to 500 feet
below ground surface. The purpose of the Northern Plume Monitoring Well is to provide additional data
on the lateral and vertical extent of groundwater contamination associated with the City's Northern Plume
and portions of the Central Plume. The proposed Northern Plume monitoring well location near the
intersection of Church and Chestnut Streets is shown on the vicinity map provided in Attachment B.
Preliminary data from Langan Treadwell Rollo indicates there will be four discrete depth levels to be
screened for future sampling. The final discrete depths and associated well screen locations will be
determined during construction and in consultation with the Board. On August 27,2014, the Board
issued approval of the draft plan for the monitoring well construction. Completion of the monitoring well is
expected by March 2015.
Following installation of the new monitoring well, a quarterly monitoring program will be implemented that
will add the monitoring of this new well to those monitoring wells in the Central, Southern and Western
plume areas.
FISCAL IMPACT:
FUNDING AVAILABLE
FWS/pmf
Attachments
Not applicable.
Funding will be presented at award of the construction contract.
F. Wally ndelin
Public Works Director
K:\WP\PRO JECTS\WATER\PC E,
APPROVE
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Schwabauer,Manager
9t22t2014