HomeMy WebLinkAboutAgenda Report - July 15, 2020 C-07AGENDA ITEM c-1
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AGENDA TITLE:
MEETING DATE:
PREPARED BY:
Adopt Resolution Authorizing City Manager to Execute Amendment No. 3 to
Professional Services Agreement with Civil Hydro Tech, LLC, of Sunnyvale, for
Consulting and Project Management Services for Decommissioning and Removal
of the Central Plume Source Area Groundwater Extraction and Soil Vapor
Extraction Systems ($157,500), and Appropriating Funds ($157,500)
July 1 5,2020
Public Works Director
RECOMMENDED ACTION: Adopt resolution authorizing City Manager to execute Amendment
No. 3 to Professional Services Agreement with Civil Hydro Tech,
LLC, of Sunnyvale, for consulting and project management services
for decommissioning and removal of the central plume source area groundwater extraction and soil
vaper extraction systems, in the amount of $157,500, and appropriating funds in the amount of
$157,500.
BACKGROUND INFORMATION: Historical practices have resulted in the contamination of groundwater
by tetrachloroethylene (PCE) and trichloroethylene (TCE) producing
fou r identified grou ndwater contaminant pl umes (Northern, Southern,
Central, and Western) within the City of Lodi. Efforts to remove PCE and related contaminants from
the Central Plume Source Area (CPSA), have been ongoing since 2003, utilizing both soil vapor extraction
(SVE) and groundwater extraction (GWE) systems. To date, the operation of the current SVE/GWE
treatment systems has resulted in the removal of slightly under 20,000 pounds of PCE since operation
began.
The City, with the assistance of Civil Hydro Tech, LLC (CHT), has been working closely on cleanup
activities for the CPSA with the Central Valley Regional Water Quality Control Board (Water Board).
Council approved a Professional Services Agreement with CHT, on April 17,2019, in the amount of
$141,700. The original scope of work includes providing sampling, monitoring and reporting specific to
achieving regulatory closure of the SVE/GWE system with the ultimate goal of system shutdown and
removal; assisting the City with management of the remaining groundwater plumes; and providing the City
with guidance related to the Sustainable Groundwater Management Act.
On August 21,2019 Council approved CHT Amendment No. 1, in the amount of $1 16,209, which
consisted of performing semi-annual groundwater monitoring and sampling of the Cily's 72 groundwater
monitoring wells over a two-year period, preparing required reports for submittal to Water Board, and out-
of-scope contingency services related to the proposed sampling and analysis program; such as any
needed well maintenance, repairs, permits, etc. This work was previously performed by another consultant
at a substantially higher cost.
On September 26, 2019, Staff met with the Water Board to present and discuss results of sampling
conducted within the CPSA. Based on this discussion, the Water Board requested the City submit a
comprehensive report detailing remedial and investigative actions to date and a proposed approach for
dealing with the remnant PCE in soil beneath the CPSA to be included with the Request for Closure of
the SVE/GWE system. The Request for Closure Report included site remedial history, figures and tables
representing the reduction in PCE over the life of the SVE system and an outline of steps required for the
APPROVED:
Stephen
R:\GROUP\ADM lN\Council\2020\07152020\Civil Hydro Tech\CC_CivilHydro_AR.doc
r, City Manager
612912020
Adopt Resolution Authorizing City Manager to Execute Amendment No. 3 to Professional Services Agreement w¡th Civil Hydro Tech, LLC, of Sunnyvale, for
Consulting and Project Management Serv¡ces for Decommission¡ng and Removal of the Central Plume Source Area Groundwater Extraction and Soil Vapor
Extraction Systems ($157,500), and Appropriating Funds (9157,500)
July 15,2020
Page 2
removal. On February 5,2020, council approved Amendment No. 2, in the amount of $41,000, the cost
of preparing the Request for Closure Report and providing on-call environmental consulting services.
On May 18,2020, the Water Board approved the City's recommended approach for CPSA remedial
systems closure and decommissioning based on the submitted Request for Closure Report. Staff
requested a proposal from CHT to provide consulting and project management services related to
closure and decommissioning. An outline of these proposed services is provided below. Staff
anticipates construction to commence in September.
1. Prepare all relevant work plans for Water Board approval;2. Prepare a Bid Package which will include plans and specifications for the soil excavation
activities, decommissioning and SVE system removal including well abandonment;3. Prepare Site and Task-specific Health and Safety Plans;4. Sampling of excavated soil, sidewalls and floors and two rounds of indoor and ambient air
monitor¡ng;5. Provide project management services (technical oversite);6. Prepare all reports relevant to Water Board San Joaquin County Environmental Health and Air
Board (soil excavation, well destruction, final closure report, etc.);7. Provide added funding for on-call environmental consulting services for City-wide plume
management.
The current agreement amount is $298,909. Amendment No. 3, if approved, would add $157,500 to the
total agreement amount, for a total not-to-exceed agreement amount of $458,409.
Staff recommends authorizing City Manager to execute Amendment No. 3 to Professional Services
Agreement with Civil Hydro Tech, LLC, of Sunnyvale, for consulting and project management services
for decommissioning and removal of the central plume source area groundwater extraction and soil
vapor extraction systems, in the amount of $157,500, and appropriating funds in the amount of
$157,500.
FISCAL IMPACT: Closure of the SVE/GWE system will significantly reduce the annual
operating expenses ($253,000); cost includes Granular Activated Carbon
change-out. This work does not impact the General Fund.
FUNDING AVA¡LABLE Appropriation Request:
Central Plume Fund (59099000.77020):
PCE/TCE Rates (56599000.77020):
TOTAL:
$ 137,500
$ 20.000
$ 157,500
\Andrew Keys
Deputy City Manager/lnternal Services Director
Charles E. Swimley, Jr
Public Works Director
Prepared by Andrew Richle, Utilities Superintendent
CES/AR/tw
Attachments
R:\GROUP\ADMIN\Council\2020\02052020\Civ¡l Hydro Tech\CC_CivilHydro_AR.doc 6129t2020