ITEM:		DISCUSSION ITEM
34.	CONSIDER FUNDING TO REPLACE/REBUILD SEASIDE BASIN MONITORING WELL FO-09S
Meeting Date:			June 21, 2021	Budgeted:	No
From:			David J. Stoldt	Program/
			General Manager	Line Item No.:	N/A
Prepared By:			David J. Stoldt	Cost Estimate:
General Counsel Approval: N/A
Committee Recommendation: None
CEQA Compliance: Action does not constitute a project as defined by CEQA

SUMMARY:  The Seaside Groundwater Basin Watermaster (WM) seeks a three-party arrangement between MPWMD, Marina Coast Water District, and WM to fund replacement of monitoring well FO-09 Shallow (FO-09S). Please see attached correspondence from the Watermaster.

The data obtained from the recent induction logging of FO-09S indicates that the dune sand deposits overlying the Paso Robles aquifer may exhibit seawater intrusion. If so, there is a risk for intrusion into the Paso Robles aquifer to occur throughout this area, either by openings (gaps) in the clay layer that separates the dune sands from the Paso Robles, or through other wells that might have leaks. A properly operating shallow monitoring well at the location of FO-09 could provide an early alert to such an occurrence. Once FO-09S is destroyed there will be no source of water level or water quality data obtainable for the Paso Robles aquifer in that area of the Seaside Basin. The District believes that it is no longer required for District purposes, but a replacement might be important to the Watermaster and Marina Coast Water District.

RECOMMENDATION: The District Board should discuss and direct that the issue be brought through the Water Supply Planning Committee.

EXHIBIT

34-A Letter from the Seaside Basin Watermaster

U:\staff\Boardpacket\2021\20210621\Discussion Items\34\Item-34.docx