B. Description of Proposed Boundary Modification

1. Short Description

   City of Sebastopol & 3 neighbor Mutual Water Companes; Jurisdictional Adjustment from Wilson Grove to Santa Rosa Plain Sub Basin
2. Type of basin boundary revision

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

   The proposed jurisdictional boundary change promotes improved sustainable groundwater management by aligning the boundaries of the Santa Rosa Plain Sub-Basin to recognize groundwater movement and recharge with the adjacent Wilson Grove Formation, alignment with the City's sphere of influence including three mutual/independent small water companies, and by allowing Sebastopol to participate in just one GSA.

   Attachment(s):
4. List of the existing basin(s)/subbasin(s) to be modified by this request

   • 1-055.01 SANTA ROSA VALLEY - SANTA ROSA PLAIN
   • 1-059 WILSON GROVE FORMATION HIGHLANDS
5. Provide the proposed name for the new basin(s) or subbasin(s)

   Santa Rosa Plain Sub Basin

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)
   	2-001 PETALUMA VALLEY , 1-059 WILSON GROVE FORMATION HIGHLANDS
   	1-059 WILSON GROVE FORMATION HIGHLANDS
   Marin County	1-059 WILSON GROVE FORMATION HIGHLANDS , 2-027 SAND POINT 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):

• size: 1
• 1902 Articles of Incorporation City of Sebastopol Article of Incorporation1902.pdf (794.1kB) Uploaded on 09/25/2018 at 04:37PM

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

Attachment(s):

• size: 2
• 2018 SGMA Boundary Reso 091818.docx (14.6kB) Uploaded on 09/13/2018 at 12:00PM
• Resolution Number 6211 Groundwater Jurisdictional Boundary Application GSA.pdf (115.6kB) Uploaded on 09/25/2018 at 04:37PM

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):

• size: 3
• Basin Bdy Map 092418.pdf (212.1kB) Uploaded on 09/25/2018 at 10:39AM
• Proposed Basin Change.pdf (1.2MB) Uploaded on 10/02/2018 at 11:55AM
• All_Agency.pdf (1.3MB) Uploaded on 10/02/2018 at 11:55AM

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

Attachment(s):

• size: 1
• Final_Shapefile_For_Sebastopol.zip (28.1kB) Uploaded on 09/27/2018 at 12:04PM

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

Attachment(s):

• size: 1
• Final_Shapefiles_For_Sebastopol_10_23_18.zip (55.8kB) Uploaded on 10/24/2018 at 05:32PM

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

The proposed basin boundary modification is not a project, and thus exempt from CEQA review.

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.

Technical description is attached

Attachment(s):

• size: 1
• Sebastopol DWR Boundary Adj E1.docx (1.8MB) Uploaded on 09/26/2018 at 09:54AM

F. Notice and Consultation

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

Sonoma County Water Agency County of Sonoma Gold Ridge Resource Conservation District City of Cotati City of Petaluma City of Rohnert Park City of Santa Rosa Belmont Terrace Mutual Water Company Fircrest Mutual Water Company Kelly Mutual Water Company

Attachment(s):

• size: 2
• 9-14-18 COUNTY_SONOMA WATER support letter_city of Sebastopol_FINAL.pdf (48.7kB) Uploaded on 09/26/2018 at 03:25PM
• SRP GSA Support Sebastopol.pdf (611.5kB) Uploaded on 09/26/2018 at 03:25PM

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

The cities, county, RCD, and Water Agency together with Sebastopol have participated since 2015 in work groups and technical committees establishing the Santa Rosa GSA. The issue of Basin Boundaries and how to best manage sustainable groundwater have been part of the GSA conversation and plan since onset. The GSA board, GSA TAC, and the work group meetings are all publically noticed and include public participation.

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.

Regarding boundary Adjustment discussions, the City met with neighbor Mutual water companies 7/03/18 & 9/05/18, the the SR GSA TAC met 1/08/18, 5/07/18, & 9/10/18 A "Boundary Adjustment" work group met 7/03/18, 7/18/18, 8/16/18, & 8/29/18 Sonoma County, Sonoma County Water Agency, Petaluma, Sonoma, Cotati, Windsor, Rohnert Park, Santa Rosa, both Gold Ridge and SR RCPs, and numerous interest groups are part of those discussions. Petaluma and Marin met as part of the "Boundary Adjustment" work group. some representative agendas and meeting documents are attached.

Attachment(s):

• size: 10
• RE_ Meeting to discuss Wilson Grove Highland basin options.pdf (1.7MB) Uploaded on 09/26/2018 at 03:27PM
• DWR ext request wilson Grove Sebastopol 060618.pdf (63.9kB) Uploaded on 09/26/2018 at 03:28PM
• LM to JJ 060418 GSA Wilson Grove Repri.pdf (47.4kB) Uploaded on 09/26/2018 at 03:28PM
• SRP GSA DWR 071018.pdf (22.1kB) Uploaded on 09/26/2018 at 03:24PM
• SRP GSA DWR 090518.pdf (26.5kB) Uploaded on 09/26/2018 at 03:24PM
• SRP GSA TAC 010818.pdf (54.2kB) Uploaded on 09/26/2018 at 03:24PM
• SRP GSA Work Group 092018.pdf (101.4kB) Uploaded on 09/26/2018 at 03:24PM
• GSA Board 080918.pdf (168kB) Uploaded on 09/26/2018 at 05:21PM
• GSA Board 61418.pdf (158.2kB) Uploaded on 09/26/2018 at 05:21PM
• GSA TAC 061118.pdf (133.3kB) Uploaded on 09/26/2018 at 05:22PM

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.

Sebastopol City Council approved making the Judicial Boundary Adjustment request at its Sept. 4, 2018 meeting and approved a Resolution at the Sept. 18, 2018 meeting. Copies of the meeting minutes and Resolution are attached.

Attachment(s):

• size: 3
• Resolution Number 6211 Groundwater Jurisdictional Boundary Application GSA.pdf (115.6kB) Uploaded on 09/26/2018 at 11:36AM
• Agenda-Item-Number-2-Approval-of-Minutes-of-September-4-2018-City-Council-Meeting.pdf (8.4MB) Uploaded on 09/26/2018 at 11:37AM
• Public Hearing Groundwater Management Act of 2014 Basin Boundary Modification Request.pdf (253.6kB) Uploaded on 09/26/2018 at 02:07PM

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.

The majority of comments were about the 3 mutual water company neighbors joining Sebastopol in the Jurisdictional Boundary Adjustment request. Sebastopol City Council agreed to include the three companies at their Sept. 4 and Sept. 18, 2018 meetings.

Attachment(s):

• size: 6
• BTMWCcover-Sebastopol-DWR-GSA2018-boundary.docx (614.5kB) Uploaded on 09/27/2018 at 11:07AM
• SRP GSA Support Sebastopol.pdf (611.5kB) Uploaded on 09/26/2018 at 10:26AM
• 9-14-18 COUNTY_SONOMA WATER support letter_city of Sebastopol_FINAL.pdf (48.7kB) Uploaded on 09/26/2018 at 10:26AM
• Fircrest Mutual Water Company inclusion in boundary modification request of Santa Rosa Basin GSA.pdf (14.6kB) Uploaded on 09/26/2018 at 10:38AM
• Kelly Mutual Water Company inclusion in boundary modification request of Santa Rosa Basin GSA.pdf (13.6kB) Uploaded on 09/26/2018 at 10:38AM
• Belmont Terrace and Sebastopol GSA.pdf (2MB) Uploaded on 09/26/2018 at 11:27AM

G. General Existing Groundwater Management

1. Explain how sustainable groundwater management exists or could likely be achieved in the basin:

Local agencies with a role in water management have formed a Santa Rosa Plain Sub Basin Groundwater Sustainability Agency. The GSA will formulate a Groundwater Sustainability Plan to measure and assess the basin's groundwater supply, then implement strategies to both enhance the water supply and limit water draw-down.

2. Explain how the proposed boundary modification would affect the ability of adjacent groundwater basins to sustainably manage groundwater in those groundwater basins.

The boundary between the Wilson Grove and Santa Rosa groundwater basins not clearly defined, and evidence suggests a substantial amount of interaction between the basins, particularly near Sebastopol. Wilson Grove provides recharge to Santa Rosa; in fact the surface watershed boundary for Santa Rosa is along the Atascadero Crest which is well into Wilson Grove. This adjustment would provide greater coverage, cooperation, and efficiency of resources for managing groundwater supply.

Attachment(s):

• size: 1
• Sebastopol DWR Boundary Adj G2.docx (684.6kB) Uploaded on 09/26/2018 at 10:40AM

3. Provide a historical summary of the sustainable management of groundwater levels in the proposed basin(s) or subbasin(s).

Prior to the formation of the Santa Rosa GSA, the area described in the boundary adjustment request was included in the Santa Rosa Plain Watershed. Attached is the 2016 Annual Report of the Groundwater management Program.

Attachment(s):

• size: 1
• SRPGMP-FINAL-2016-Annual-Report.pdf (12.8MB) Uploaded on 09/25/2018 at 03:11PM

4. Discuss potential impacts to state programs resulting from the proposed boundary modification, including, but not limited to, the California Statewide Groundwater Elevation Monitoring (CASGEM), Groundwater Management Plans developed pursuant to AB 3030, Groundwater Sustainability Plans developed pursuant to the Sustainable Groundwater Management Act, any applicable state or regional board plans, and other water management and land use programs.

By providing greater coverage area, and tying in the SRP Sub Basin to Wilson Grove so as to include some of the recharge area and additional sections of the watershed, management of ground water will be enhanced and more efficient.

H. Local Support

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

The proposed modifications were discussed both by the GSA Board and the GSA TAC at public meetings. All involved affected agencies and systems have representation participating with both the Board and TAC.

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.

Sonoma County/Sonoma County Water Agency Santa Rosa Plain GSA Board Belmont Terrace Mutual Water Company Fircrest Mutual Water Company Kelly Mutual Water Company

Attachment(s):

• size: 7
• Belmont Terrace and Sebastopol GSA.pdf (2MB) Uploaded on 09/26/2018 at 11:27AM
• Belmont Terrace and Sebastopol GSA.pdf (2MB) Uploaded on 09/26/2018 at 11:27AM
• BTMWCcover-Sebastopol-DWR-GSA2018-boundary.docx (614.5kB) Uploaded on 09/27/2018 at 11:06AM
• 9-14-18 COUNTY_SONOMA WATER support letter_city of Sebastopol_FINAL.pdf (48.7kB) Uploaded on 09/26/2018 at 10:41AM
• Fircrest Mutual Water Company inclusion in boundary modification request of Santa Rosa Basin GSA.pdf (14.6kB) Uploaded on 09/26/2018 at 10:41AM
• Kelly Mutual Water Company inclusion in boundary modification request of Santa Rosa Basin GSA.pdf (13.6kB) Uploaded on 09/26/2018 at 10:41AM
• SRP GSA Support Sebastopol.pdf (611.5kB) Uploaded on 09/26/2018 at 10:41AM

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

No opposition was received

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.

Technical discussions are attached.

Attachment(s):

• size: 4
• Sebastopol DWR Boundary Adj I1.docx (13.8kB) Uploaded on 09/26/2018 at 10:43AM
• Sebastopol DWR Boundary Adj I2.docx (211.6kB) Uploaded on 09/26/2018 at 10:43AM
• Sebastopol DWR Boundary Adj I3.docx (13.8kB) Uploaded on 09/26/2018 at 10:43AM
• Sebastopol DWR Boundary Adj I4.docx (13.9kB) Uploaded on 09/26/2018 at 10:43AM

L. Technical Studies for All Jurisdictional Modifications

1. A water management plan that covers or is in the immediate vicinity of the proposed basin or portion of the proposed basin and satisfies the requirement of Water Code sections 10753.7(a) or 10727 by attaching one of the following:
   1. An adopted groundwater management plan, a basin wide management plan, or other integrated regional water management program or plan.
   2. Management pursuant to an adjudication action.
   3. One or more technical studies that cover the relevant portion of a basin or subbasin and adjacent areas.

URL: http://santarosaplaingroundwater.org/wp-content/uploads/SRP_GMP_12-14.pdf

Attachment(s):

• size: 1
• Sebastopol DWR Boundary Adj L1C.docx (17kB) Uploaded on 09/26/2018 at 10:42AM

2. A statement of the existing and planned coordination of sustainable groundwater management activities and responsibilities where required.

A statement of coordination is included in the Santa Rosa, Sonoma Valley, and Petaluma Sub-Basins as part of their resepctive JPA agreements. In fact, the three sub-basins share GSA staffing.