ITEM:		CONSENT CALENDAR
6.	DIRECT THE GENERAL MANAGER TO ENTER INTO A CONTRACT WITH ZIM INDUSTRIES TO REHABILITATE ASR 1 FOR AN AMOUNT NOT TO EXCEED $113,350
Meeting Date:			February 25, 2021	Budgeted:	Yes
From:			David J. Stoldt	Program/	Water Supply Projects
			General Manager	Line Item No.:	1-2-1
Prepared By:			Jonathan Lear	Cost Estimate:	$113,350
General Counsel Review: N/A
Committee Recommendation: The Administrative Committee reviewed this item on February 10, 2021 and recommended approval.
CEQA Compliance: This action does not constitute a project as defined by the California Environmental Quality Act Guidelines section 15378.

SUMMARY: While CalAm was operating ASR 1 in recovery over the 2019 summer, District staff noted that the required flush rate of 3,000 gpm by the Department of Drinking Water Permit could no longer be maintained without the pump bowles breaking suction and causing cavitation.

Upon further investigation, the constant sustainable flux rate of ASR 1 was determined to be approximately 2,250 gpm. At that point Cal-Am and the District approached DDW and modified the conditions of the permit to flush at the sustainable rate but for a longer period of time prior to using ASR 1 as a source to the system.

Long term operations of ASR 1 both in injection and recovery will require the well be formally rehabilitated to restore efficiency and operational flexibility of the ASR well field.

RECOMMENDATION: The Administrative Committee recommends that the Board direct the General Manager to enter into an agreement for $113,350 with ZIM Industries to complete a formal rehabilitation of ASR 1.

BACKGROUND: ASR 1 was constructed in 2001 and was last rehabilitated in 2007, after which the well displayed a pumping specific capacity of 59.7 gallons per minute per foot of drawdown (gpm/ft). Since then, the well’s performance has steadily declined to 31.1 gpm/ft as a result of residual plugging, representing a decline of approximately 48 percent. It is noted that the observed decline due to residual plugging from injection operations is to be expected as with most ASR wells, and the periodic rehabilitation of ASR wells is a part of the routine maintenance required to maintain capacity and extend useful well service-lives.

In late January 2020 MPWMD staff directed Pueblo Water Resources to send a request for quotes to three qualified contractors holding valid licenses (C-57/C-61) to perform a formal rehabilitation on ASR 1. The lowest quote was submitted by ZIM Industries whom has also successfully performed rehabilitations on ASR 2 and 3.

In March 2020 in response to the first Shelter in Pace Order related to COVID 19, Cal-Am requested the District hold off on beginning the rehabilitation work due to the unknowns related to interruptions in staffing or supply chains. ASR 1 was an important well needed for recovery of Pure Water Monterey water and Cal-Am in the 2020 summer recovery season. Rather than risk the possibility that the rehabilitation work would be interrupted by the Pandemic and the well would not be ready when needed for PWM recovery, Cal-Am choose to push the work to early 2021. Following Cal-Am’s request, the District notified ZIM Industries that the work would be postponed until early 2021.

The original quote provided by ZIM to complete the rehabilitation was for $104,460 and was good for 90 days. At the March 16, 2020 Regular Board Meeting, the Board approved on Consent Calendar accepting the quote from ZIM and proceeding with the work. Due to postponing the work as a cautionary measure, the 90 days have elapsed. The District is now beginning contracting for this work according to the current schedule and ZIM has informed District Staff that there is a 3% increase in cost due to slight increases in labor and chemicals from when the job was quoted in February 2020. Adding a 5% contingency to the new quote of $107,951, the amount of the contract will be $113,350. The new contract amount is still $50,000 less than the nearest quote received last February.

IMPACT TO STAFF/RESOURCES: Funds for this project are included in the FY 2020-21 budget under “Water Supply Projects,” line item 1-2-1. Funds expended to complete this work will be reimbursed to the District by CalAm through the ASR Management and Operations agreement between the District and CalAm. Staff time will be utilized to provide project management and oversee field work.

EXHIBIT

6-A Technical Specifications and ZIM Industry quotes received to complete ASR rehabilitation work

U:\staff\Boardpacket\2021\20210225\Consent Calendar\06\Item-6.docx