ITEM: |
CONSENT CALENDAR |
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4. |
CONSIDER Authorization of Budgeted CONTINGENCY
ADJUSTMENT FOR Drilling of Full-Scale Aquifer Storage and Recovery (ASR) Well
as part of MPWMD Phase 1 ASR Project |
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Meeting Date: |
February 22, 2007 |
Budgeted: |
Yes |
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From: |
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Program/ |
Water Supply |
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General Manager |
Line Item No.: |
1-2-1 A. 1 |
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Prepared By: |
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Cost Estimate: |
$,1058,935 |
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General Counsel Approval: Approved as to form. |
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Committee Recommendation: The Administrative Committee considered
this item on February 12, 2007 and recommended approval. |
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CEQA Compliance: N/A |
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SUMMARY: On November 20, 2006, the Board
authorized a contract agreement with Zim Industries, Inc. to complete
construction of a second full-scale Aquifer Storage and Recovery (ASR) well as
part of the Monterey Peninsula Water Management District’s (District’s) Phase 1
ASR Project. Drilling operations began
in December 2006 and the new well is currently undergoing well
development. The contract not-to-exceed
amount was $1,058,935, which included a 5% ($50,425) budget contingency for
unforeseen circumstances that may be encountered during construction. The assigned contingency was less than the
more normal 10% based on the proximity of the new well to the existing Santa
Margarita Test Injection Well No. 1 (SMTIW No. 1), and the assumption that
conditions to be encountered would be more certain and less likely to require
contingency funds above the bid cost estimate.
However, as drilling and well completion have progressed, several conditions
have been encountered that have or will result in the need for additional
contingency funds to be available for this project. These include: (a) deeper than anticipated total drilling
depth to the base of the target aquifer, the Santa Margarita Sandstone, (b)
deeper than anticipated total casing depth for both the new ASR well and the
associated monitor well, and (c) additional well development work than
anticipated in the original bid document.
Given that substantial work still
remains to be accomplished under the contract (i.e., finish well development,
install test production equipment, conduct production testing, install test
injection equipment, conduct injection testing, install permanent pump and
motor, conduct rehabilitation at SMTIW No. 1), staff recommends that the
current 5% contingency be increased to 15%.
This is a budget contingency increase of $100,851, resulting in a total
budget contingency of $151,276.
RECOMMENDATION:
District staff recommends that the General Manager be authorized to expend
budgeted contingency funds as needed up to a total of $151,276, consisting of
5% existing authorized amount ($50,425) plus a recommended 10% increase
($100,851). The Administrative Committee
reviewed this item on February 12, 2007 and voted 3 to 0 to recommend approval
of this additional contingency authorization.
BACKGROUND: A
Call For Bids for the drilling and construction of the SMTIW No. 2 was
distributed to prospective drilling contractors on October 13, 2006, and a
Public Notice Inviting Sealed Bids was published in The Herald on
October 19, 20, and 21, 2006. At the bid
opening on November 3, 2006, responses were received from three firms, ranging
from $1,008,510 to $1,427,000. On
November 20, 2006, the Board authorized a contract agreement with the low
bidder, Zim Industries, Inc., which is the same firm that was contracted to
construct the SMTIW No. 1 in 2001 and 2002.
Mobilization began on December 4, 2006, and well installation was completed
in late January 2007. Actual drilling
and well completion depths were 70 feet deeper than anticipated in the bid
document. Accordingly, the existing
authorized budget contingency was exhausted due to the extra required drilling
and well completion depths. Currently,
the new well is undergoing rigorous well development, which is requiring extra
time and expenditure to complete, including the need to lower the development
pump in the well for more effective and extended pumping development. This work will require a change order of
$6,000, which is not available in the currently authorized budget
contingency. Given the need for this
additional work plus other potential additional unforeseen tasks that could
occur while other work is being accomplished under this contract, staff is now
recommending that the existing 5% authorized contingency be increased to 15% to
cover for this and other possible contingency needs.
IMPACT TO STAFF/RESOURCES:
Budgeted amounts to complete the SMTIW No. 2 drilling and construction
and SMTIW No. 1 rehabilitation are included in the District’s FY 2006-2007
budget (Goal: Augment Water Supply,
Water Supply Projects, Objective 1-2-1 A. 1. Second ASR Well, page 15 of June
22, 2006 adopted budget). This budget
includes a contingency for this component of the Phase 1 ASR Project work of
$255,000. The revised recommended
contingency under this contract of 15% ($151,276) is within the budgeted
contingency amount.
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