B. Description of Proposed Boundary Modification

1. Short Description

   Scientific modifications of the Paso Robles Basin justified by Rinconada Fault and other geology.
2. Type of basin boundary revision

   • Scientific External
   • Scientific Internal
3. Provide a narrative overview of the boundary modification request and how the resulting modification would affect likelihood of sustainable management.

   The proposed Atascadero Area Subbasin boundary modification request includes an internal boundary and external boundary modification request. A) Updating the external boundary (western edge) of the subbasin based on updated geologic mapping to better represent the extent of the primary aquifer (the Paso Robles Formation) within the subbasin. This refinement will have minimal impact with regard to sustainable groundwater management in the subbasin. B) Formally recognizing the Rinconada Fault as a subbasin boundary between the proposed Atascadero Area Subbasin and the Paso Robles Subbasin has significant impacts on sustainable management within the Atascadero Area Subbasin, and minimal impact on sustainable groundwater management efforts in the Paso Robles Subbasin. Creating the Atascadero Area Subbasin will allow the groundwater managers to continue to sustainably operate the subbasin as they have for over 20 years, which has resulted in higher groundwater levels and no undesirable results. As described in more detail in Attachment B3a - Atascadero Area Subbasin Sustainable Groundwater Management Overview the modification will facilitate sustainable groundwater management for the following reasons: 1) Water demands in the subbasin total about 16,000 acre-feet per year, and are not anticipated to appreciably change in the future. 2) Urban demand totals about 12,000 acre-feet per year of the total demand in the subbasin and can be reduced in dry years because of effective implementation of water conservation efforts by Templeton Community Services District and Atascadero Mutual Water Company. 3) Templeton Community Services District (TCSD) and Atascadero Mutual Water Company (AMWC) have invested in the Nacimiento Water Project and are importing over 2,250 acre-feet of water per year, further reducing the demand on groundwater in the subbasin. Both TCSD and AMWC have contract amendments into the San Luis Obispo County Board of Supervisors to increase their combined subscription to the Nacimiento Water Project to 3,650 acre-feet per year. 4) Operations of the Atascadero Area Subbasin will continue to support flow requirements of the Salinas River, as regulated by the State Water Board, and the associated underflow, which serves as a source of recharge to both the Atascadero Area Subbasin and the Paso Robles Subbasin. If the basin boundary modification is not accepted, the Atascadero Subbasin will be subjected to the same fate as the Paso Robles Subbasin, which rejected the formation of the Paso Robles Water District and funding for sustainable groundwater management activities in the Paso Robles Subbasin on March 8, 2016. This failure to establish leadership and funding to support sustainable groundwater management in the Paso Robles Subbasin is now more likely to result in State Water Board intervention in the Paso Robles Subbasin, and if the basin boundary modification is not approved, will include the sustainably managed Atascadero Area, subjecting them to added State Water Board enforcement actions and costs.

   Attachment(s):

   Attachment B3a- Groundwater Sustainability Overview.pdf (331.7kB) Uploaded on 03/29/2016 at 04:17PM

   Attachment B3b 12-15-15_Letter_from_State_Water_Board.pdf (1MB) Uploaded on 03/29/2016 at 04:17PM
4. List the existing basin(s)/subbasin(s) to be modified by this request

   • 3-004.06 SALINAS VALLEY - PASO ROBLES AREA
5. Provide the proposed name for the new basin(s) or subbasin(s)

   Salinas Valley - Atascadero Area

C. Initial Notification and Combination of Requests

1. Was an initial notification submitted to the Department?

   Yes
   List of submitted initial notification for the selected basin(s)/subbasin(s).

   Local Agency	Potential Basin(s)/Subbasin(s)
   Templeton Community Services District	3-004.06 SALINAS VALLEY - PASO ROBLES AREA
   Heritage Ranch Community Service District	3-004.06 SALINAS VALLEY - PASO ROBLES AREA
   Monterey County Water Resources Agency	3-004.06 SALINAS VALLEY - PASO ROBLES AREA
   	3-004.05 SALINAS VALLEY - UPPER VALLEY AQUIFER , 3-004.06 SALINAS VALLEY - PASO ROBLES AREA
   	3-004.06 SALINAS VALLEY - PASO ROBLES AREA

2. Does this application include a combination of requests?

   No

D. Required Documents for All Modifications

1. A copy of the statutory or other legal authority under which the requesting agency was created with specific citations to the provisions setting forth the duties and responsibilities of the agency.

Attachment(s):

• TempletonCSD-Certificate-of-Filing-Reso-Dec1976.pdf (1.4MB) Uploaded on 03/14/2016 at 09:22AM

2. A copy of the signed resolution adopted by the requesting agency formally initiating the boundary modification request process.

Attachment(s):

• RESO22016-BASIN-BOUNDARY-MODIFICATIONmar2016.pdf (1MB) Uploaded on 03/17/2016 at 08:54AM

3. A map of adequate scale (no greater than 1:24,000; e.g., 1:10,000 is not acceptable) showing the proposed modified basin boundary in relation to the existing Bulletin-118 basin boundary and the local agencies that are within or bordering the existing and proposed basin.

Attachment(s):

• Exhibit06_BasinBoundary v DWR B118.pdf (530.6kB) Uploaded on 03/11/2016 at 02:05PM

4. A GIS shapefile of the proposed modified groundwater basin boundaries. Download Existing B118 basin shape file | DWR Spatial Data Standards

Attachment(s):

• Atascadero_Modified.zip (21.9kB) Uploaded on 03/17/2016 at 01:03PM

5. A GIS shapefile of the political boundaries of any affected or adjacent local agency. Download water agency shape file

Attachment(s):

• WaterPurveyors_PasoRoblesSubbasin.zip (59.8kB) Uploaded on 03/22/2016 at 02:29PM

6. Any information, if necessary, to enable DWR to satisfy the requirements of a responsible agency pursuant to the California Environmental Quality Act.

See the attached filed notice of determination.

Attachment(s):

• NOTICE-FILED-BOUNDARY-BASIN-SLO-COUNTY-MAR22016.pdf (251.2kB) Uploaded on 03/11/2016 at 02:10PM

E. General Information

1. Describe the lateral boundaries of the alluvial aquifer or aquifers that form the groundwater basin and the definable bottom of the basin. The description must be in terms that are clear, definite, and sufficiently detailed to allow an authoritative map of the proposed basin boundaries to be plotted using the given description.

See the attached Report.

Attachment(s):

• Lateral Boundaries Section.pdf (1.8MB) Uploaded on 03/29/2016 at 02:47PM

F. Notice and Consultation

1. List all local agencies and public water systems affected by the basin(s) modification request.

See the attached list.

Attachment(s):

• ATASCADERO-GROUNDWATER-BASIN-NTC-DISTRIBUTIONLISTfeb52016c.pdf (37.3kB) Uploaded on 03/22/2016 at 02:39PM

2. Explain the methods used to identify interested local agencies and public water systems in the affected basin(s):

Water purveyors (e.g., Community Services Districts, Mutual Water Companies, Cities, etc.) were identified through local knowledge of the agencies, and through a research of records maintained by San Luis Obispo County Local Agency Formation Commission (SLO LAFCO). This link to the SLO LAFCO website provides the directories of agencies within San Luis Obispo County: http://www.slolafco.com/Directory_2.htm The District notified by email/US Mail all of the parties/agencies shown on the attached list and provided the announcement shown in the attached. In addition, The District provided information to the Paso Robles Daily News, San Luis Obispo Tribune, Templeton Soaring Eagle Press and the Atascadero News regarding the public hearing - all of which ran articles on the proposed modification. We also set up the website www.atascaderobasin.com to keep interested parties appraised.

Attachment(s):

• ATASCADERO-GROUNDWATER-BASIN-NTC-DISTRIBUTIONLISTfeb52016c.pdf (37.3kB) Uploaded on 03/22/2016 at 02:39PM
• NOTICE-PUBLIC-HEARING-ATASCADERO-BASIN-2016.pdf (620.1kB) Uploaded on 03/22/2016 at 02:40PM

3. Provide information regarding the nature of consultations with affected or interested agencies. Attach and cite any copies of correspondences with local agencies and public water systems and/or any other persons or entities consulted.

The Templeton Community Services District (TCSD), in cooperation with the Atascadero Mutual Water Company (AMWC), have been in active consultation and meetings with various surrounding agencies and interested parties concerning the possibility of a Basin Boundary Adjustment for the Atascadero Basin since well before SGMA was signed into law. In 2013, TCSD and AWMC commissioned Fugro to further research and develop a comprehensive understanding of the relationship between the Atascadero Sub-basin and the Paso Robles Area Sub-basin, building upon the published information already known. Once SGMA became law, the understanding we gained was shared with various groups in many settings. The attached document lists the public meetings that have been held with the topic of the modification of the Paso Robles Basin to separate the Atascadero Basin has been discussed. In addition, there have been several meetings between agencies to review the information in more detail. As the Basin Boundary Modification request regulations were being finalized last fall, TCSD and AWMC began having a series of meetings with the nearby agencies, sharing information and discussing the science that supports the Boundary Modification. In October 2015 and January 2016, TCSD and AMWC technical experts met with the experts representing the City of Paso Robles and San Luis Obispo County. AMWC General Manager John Neil met with representatives of San Luis Obispo County Green Alliance in December 2014, Garden Farms Mutual Water Company in January and June 2015, with Santa Margarita Advisory Council in March 2015, Santa Margarita Community Service Area 23 in March 2015, with Santa Ysabel Ranch Mutual Water Company in January 2016, and there have been several meetings between the staff and elected officials from the City of Paso Robles, City of Atascadero, TCSD, and AMWC in February and March 2016.

Attachment(s):

• 2016 03 02 Public Outreach Log.pdf (111kB) Uploaded on 03/14/2016 at 08:33AM

4. Provide a summary of all public meetings at which the proposed boundary modification was discussed or considered by the requesting agency. Attach and cite any copies of agendas and notices published.

The TCSD Board of Directors discussed the proposed Basin Boundary Modification at its January 23, 2016 Strategic Planning Session, its February 2, 2016 Board Meeting, and at its March 1, 2016 Board Meeting where a public hearing was held. Agendas, meeting minutes, and pertinent staff report and exhibits are attached.

Attachment(s):

• FEB22016-AGENDA-STAFF-RPT-AND-MINUTES2016.pdf (1.7MB) Uploaded on 03/22/2016 at 02:44PM
• BASIN-BOUNDARY-ADJUSTMENT-MAPS-march12016.pdf (10.2MB) Uploaded on 03/22/2016 at 04:17PM
• MARCH12016-AGENDA-STAFF-RPT-MINUTES-2016.pdf (7.9MB) Uploaded on 03/22/2016 at 04:10PM
• JAN232016-AGENDA-MINUTES-2016.pdf (2MB) Uploaded on 03/22/2016 at 02:43PM

5. Attach a copy of all comments regarding the proposed boundary modification received by the requesting agency and a summary of any responses made by the requesting agency.

See the attached file containing a listing of all written comments received.

Attachment(s):

• TEMPLETON-CSD-BASIN-BOUNDARY-COMMENTS-ALL-PARTIES.pdf (1.6MB) Uploaded on 03/30/2016 at 09:32AM

H. Local Support

1. Provide any evidence that sufficient information was provided to affected agencies and systems regarding the proposed boundary modification.

The TCSD provided emailed and/mailed notification to the affected agencies shown on the attached list. The date notification was provided as well as the contact person and method used to provide notification is shown on the list. A copy of the notice that was sent to the affected agencies is also attached. Additionally, a website (www.atascaderobasin.com) has been set up and is being maintained with current information about the proposed Basin Boundary Modification.

Attachment(s):

• ATASCADERO-GROUNDWATER-BASIN-NTC-DISTRIBUTIONLISTfeb52016c.pdf (37.3kB) Uploaded on 03/23/2016 at 08:52AM
• NOTICE-PUBLIC-HEARING-ATASCADERO-BASIN-2016.pdf (620.1kB) Uploaded on 03/23/2016 at 08:53AM

2. Provide a list of all affected agencies and affected systems that submitted comments and/or documents in support or opposition to the proposed boundary. The agency submitting their support or opposition for a boundary modification must provide a copy of a resolution formally adopted by the decision-making body of the affected agency or system or a letter signed by an executive officer or other official with appropriate delegated authority who represents the agency or system. Attach copies of the resolution and/or signed letter detailing the support or opposition submitted.

Please see the attached resolutions and letters received.

Attachment(s):

• TCSD-BASIN-BOUNDARY-RESOS-LTRS-AFFECTED-AGENCIES-SYSTEMS.pdf (887.8kB) Uploaded on 03/30/2016 at 09:33AM

3. Provide any evidence that rebuts any opposition to the proposed boundary modification.

See the attached document.

Attachment(s):

• Reply to Opposition.pdf (75.4kB) Uploaded on 03/29/2016 at 02:55PM

I. Hydrogeologic Conceptual Model

1. Principal aquifer units within requested basin.
2. Lateral boundaries of the proposed basin, including:
   1. Geologic features that significantly impede or impact groundwater flow.
   2. Aquifer characteristics that significantly impede or impact groundwater flow.
   3. Significant geologic and hydrologic features and conditions of the principle aquifer units, as appropriate, including information regarding the confined or unconfined nature of the aquifer, facies changes, truncation of units, the presence of faults or folds that impede groundwater flow, or other groundwater flow restricting features.
   4. Key surface water bodies, groundwater divides and significant recharge sources.
3. Recharge and discharge areas within the basin.
4. Definable bottom of the basin or subbasin.

The department may waive this requirement for an internal boundary modification if the requesting agency is able to demonstrate that the proposed boundary modification is unlikely to affect sustainable groundwater management.

See the attached Report.

Attachment(s):

• Hydrogeologic Conceptual Model.pdf (1.3MB) Uploaded on 03/29/2016 at 02:49PM

J. Technical Studies for External Scientific Modifications

1. A qualified map that depicts the lateral boundaries of the aquifers that define the basin or subbasin.

See the attached map.

Attachment(s):

• GeologyMap with Basin Bndy_031716.pdf (20.6MB) Uploaded on 03/23/2016 at 08:57AM
• Certification of documents_040516.pdf (261.1kB) Uploaded on 04/05/2016 at 11:13AM

2. A technical study that provides subsurface data that demonstrates the vertical thickness and relevant physical properties of the alluvial aquifer or stacked series of alluvial aquifers.

See the attached Report and two exhibits.

Attachment(s):

• Plate05_PlanandProfileAB.pdf (19MB) Uploaded on 03/29/2016 at 04:15PM
• Atascadero Basin Boundary Modification Technical Report.pdf (6.8MB) Uploaded on 03/29/2016 at 02:51PM
• Plate17_HydrographLocationMap.pdf (11.5MB) Uploaded on 03/29/2016 at 03:26PM
• Certification of documents_040516.pdf (261.1kB) Uploaded on 04/05/2016 at 11:13AM

K. Technical Studies for Internal Scientific Modifications

1. A qualified map depicting structural geologic features that could significant impact or impede lateral groundwater flow.

See the attached map.

Attachment(s):

• GeologyMap with Basin Bndy_031716.pdf (20.6MB) Uploaded on 03/23/2016 at 09:00AM
• Certification of documents_040516.pdf (261.1kB) Uploaded on 04/05/2016 at 11:13AM

2. Geologic and hydrologic evidence of groundwater conditions by attaching or providing a URL to any of the following:
   1. Historical and current potentiometric surface maps, groundwater levels, groundwater recharge and discharge areas of the aquifer system within the vicinity of the proposed boundary modification.
   2. Aquifer performance testing results demonstrating basin boundary condition response.
   3. Water quality information of the aquifer system including but not limited to general water quality parameters and isotopic analysis.
   4. Supporting certified geophysical studies.
   5. Any other pertinent information.

See the attached Report and two exhibit.

Attachment(s):

• Atascadero Basin Boundary Tech Rept Addendum.pdf (3.2MB) Uploaded on 09/01/2016 at 08:59AM
• Atascadero Basin Boundary Modification Technical Report.pdf (6.8MB) Uploaded on 03/29/2016 at 02:51PM
• Plate17_HydrographLocationMap.pdf (11.5MB) Uploaded on 03/29/2016 at 03:29PM
• Certification of documents_040516.pdf (261.1kB) Uploaded on 04/05/2016 at 11:13AM
• Plate05_PlanandProfileAB.pdf (19MB) Uploaded on 03/29/2016 at 04:13PM