|
ADMINISTRATIVE
COMMITTEE |
||||
|
|
||||
|
3. |
CONSIDER AUTHORIZING A CONTRACT AMMENDMENT WITH MARTIN FEENEY FOR
PERFORMING PROJECT MANAGEMENT FOR THE FINAL CONDITIONING OF THE PURE WATER
MONTEREY INJECTION WELL FIELD |
|||
|
|
||||
|
January 13, 2021 |
Budgeted: |
No |
||
|
|
||||
|
David J. Stoldt |
Program/ |
Water Supply Projects |
||
|
|
General Manager |
Line Item No.: |
1-2-1 |
|
|
|
||||
|
Jonathan Lear |
Cost Estimate: |
$2,970 |
||
|
|
||||
|
General Counsel Review: N/A |
||||
|
Committee
Recommendation: The Administrative
Committee reviewed this item on January 13, 2021 and recommended
__________________. |
||||
|
CEQA
Compliance: This action does not constitute a project as
defined by the California Environmental Quality Act Guidelines section 15378. |
||||
SUMMARY: Pure Water Monterey (PWM) began injecting water in March. In August, the wells moved into the final commissioning stage. This stage involved chemical treatment, brushing and swabbing of the well screens. The final commissioning is a step that has been performed on all injection wells in the Santa Margarita Sandstone to restore the injection well capacity after a preliminary decline following initial injection. It is the Districts experience that all injection wells in the geologic formation experience an initial decline of injection capacity and the final commissioning step returns the wells to their initial performance. Final commissioning of both wells was completed early January 2021.
DISCUSSION: Martin Feeney
was retained by the District to supervise the final commissioning of the PWM
injection wells. The commissioning began
with DIW 1 in August and was completed with the DIW 2 work finishing in January
2021. Both wells improved in injection
performance as expected. Acid treatment
is a step in the commissioning process and the program specified for the PWM
commissioning work was developed from the District’s experience with its ASR
wells. Because the water quality of the
Advanced Treated Water and the Carmel River Water differ, the amount of acid
required to commission an ASR well is greater than the amount of acid required
to commission the PWM wells. In the
District’s experience with ASR well commissioning, acid is added to a well and
after 2 days the pH of the acid water mix is close to neutral due to the
reaction of the acid with minerals deposited in the well through the injection
of Carmel River water. In the case of
PWM, there was not as much deposition of minerals in the well so there was not
as much reaction with the acid introduced into PWM injection well 1. The District’s permit to spread water on to
the former Fort Ord lands has water quality specifications and the discharge
water form PWM injection well 1 required treatment to reach pH neutral prior to
pumping the water from the well. This
process added 3 days to the estimated schedule and the increased labor is the
cause for the cost increase. Martin
Feeney adjusted the amount of acid added to PWM injection well 2 based on what
we learned from the commissioning of well 1 and the neutralization step was not
required for commission of well 2. The
contract amendment to compensate Martin Feeney for the unexpected time required
for the neutralization step completed during the well 1 commissioning is
included as Exhibit 3-A.
RECOMMENDATION: The Committee should recommend that the Board
authorize the General Manager to enter
into a contract amendment with Martin Feeney for $2,970 to compensate the
neutralization step completed during the commissioning of PWM well 1.
BACKGROUND: The District has been investigating and operating ASR wells in the Santa Margarita Sandstone since 2001. There are now 6 wells including the Carmel River ASR and PWM projects. All 6 wells have experienced an initial drop off in performance following startup. In the Carmel River ASR wells, the commissioning step has proved to restore the wells to near their post development performance.
IMPACT TO STAFF/RESOURCES: Funds for this project were not included in the FY 2020-21 budget under “Water Supply Projects,” line item 1-2-1 and will addressed through the mid-year budget adjustment process.
EXHIBIT
3-A Contract Amendment No. 1
U:\staff\Board_Committees\Admin\2021\20210113\03\Item-3.docx