HomeMy WebLinkAboutE-5.1. Award Task Order 11 Aspan Well ReactivationCONSENT CALENDAR
TO: HONORABLE CHAIRPERSON AND MEMBERS OF THE AZUSA UTILITY
BOARD
FROM: MANNY ROBLEDO, DIRECTOR OF UTILITIES
DATE: APRIL 26, 2021
SUBJECT: AWARD TASK ORDER 11 FOR ASPAN WELL REACTIVATION
FEASIBILITY STUDY TO STETSON ENGINEERS, INC.
BACKGROUND:
Azusa Light & Water’s (“ALW ”) Aspan Well (“Aspan”) has been inactive since 1987 due to
contamination. In light of continuing drought conditions, ALW is investigating the possibility of
reactivating and utilizing the well to supplement water supplies from the Main San Gabriel
Valley Basin, which has greater capacity than the Upper San Gabriel Valley Basin. In 2018,
ALW performed a pump test to determine Aspan’s physical condition and current water quality.
The test determined that the well is viable for reactivation with proper treatment. As a next step,
Staff proposes to employ Stetson Engineers to evaluate potential hydraulic impacts and identify
required facilities and costs to reactivate and integrate the well into the distribution system. The
proposed action would award Task Order 11, under an existing Master Professional Services
Agreement, to Stetson Engineers, Inc., for a not-to-exceed amount of $27,500.
RECOMMENDATION:
Staff recommends the Utility Board take the following action:
1)Award Task Order 11 for Aspan Well Reactivation Feasibility Technical
Memorandum to Stetson Engineers, Inc., under the existing Master Professional
Services Agreement, for a not-to-exceed amount of $27,500.
ANALYSIS:
ALW’s Aspan Well (a.k.a. Genesis 2) was constructed in 1951 with a pumping capacity of 4,300
gallons per minute (“GPM”). The well is located on North Aspan Avenue, near West 3rd Street,
in the City of Azusa. This well draws water from the more expansive Main San Gabriel Basin,
E-5Approved
Utility Board
4/26/21
Award Task Order 11 for Aspan Well Reactivation
April 26, 2021
Page 2
which is a deeper and more plentiful source of water supply for ALW. In 1979, due to an
increased understanding of carcinogenic water contaminates, the United States Environmental
Protection Agency, along with California regulatory agencies, imposed a maximum contaminant
level for volatile organic compounds (“VOCs”). These compounds, in particular
tetrachloroethylene (“PCE”) and trichloroethlylene (“TCE”), were discovered in various
groundwater basins and attributed to industrial metal degreasing and dry cleaning operations. In
the 1980s, it was discovered that Aspan Well had traces of these contaminates, in addition to
elevated levels of Nitrate (“NO3”). The well was subsequently shutdown in 1987 and has
remained inoperable ever since.
Following the pump test and inspection of Aspan in 2018, it was determined that the well is
viable for reactivation with appropriate treatment. The next step would be to determine potential
system hydraulic impacts associated with reactivation. In addition, ALW is considering the
possibility of treating Well 9 and/or 10, both of which are vulnerable to VOC contamination, in
conjunction with the reactivated Aspan Well. An existing reservoir and pump station at the
Aspan Well site will also be analyzed for viability.
The scope of work includes a review of hydraulic impacts to the existing ALW water system,
identifying baseline demands, and incorporating reactivation alternatives based on potential
combinations of wells, treatment plant locations, and use of storage facilities.
After an examination of reactivation alternatives, the technical memorandum will review
additional water system improvements and costs necessary for the reactivation and integration of
the well. These may include upgrades to existing piping, installation of new piping, reservoir
recommissioning, booster pump station recommissioning, and upgrades to the proposed
treatment systems. Costs estimates will be provided for each of the reactivation alternatives.
Stetson Engineers has extensive experience working with well treatment projects, and is
intimately aware of contaminates and water resources in the Main San Gabriel Basin. Based on
their experience and previous successful work performed for ALW, Staff recommends the Utility
Board award Task Order 11, under the existing Master Professional Services Agreement, for a
not-to-exceed amount of $27,500.
FISCAL IMPACT:
Funding for Task Order 11 is available in the Water Division’s Operations and Maintenance
Budget, Account No. 32-40-721-790-6340 (Special Studies).
Prepared by: Reviewed and Approved:
Jared Macias Manny Robledo
Assistant Director of Utilities – Water Operations Director of Utilities
Award Task Order 11 for Aspan Well Reactivation
April 26, 2021
Page 3
Reviewed and Approved:
Sergio Gonzalez
City Manager
Attachments:
1) Task Order 11 - Stetson Engineers Aspan Reactivation Proposal