B. Description of Proposed Boundary Modification

1. Short Description

   Scientific external boundary modification to conform to the latest geologic mapping of Quaternary unconsolidated sediments.
2. Type of basin boundary revision

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

   Currently, the Carpinteria Basin, as delineated by Bulletin 118, does not conform to the best available science defining the contact between Quaternary unconsolidated sediments and Tertiary rocks. Recently published geologic maps (Minor, et al, 2009 and 2015) provide updated mapping of this contact and form the technical basis for the requested modification. The proposed modification will ensure that the entire aquifer is managed under a GSP, which will promote the goals of SGMA. It is noted that Montecito Water District is separately submitting a jurisdictional modification of the shared boundary between the Montecito Basin (3-049) and Carpinteria Basin (3-018) to conform to service area boundaries. This scientific boundary modification request by Carpinteria Valley Water District does not conflict with the jurisdictional boundary modification request by Montecito Water District (Carpinteria Valley Water District supports Montecito Water District's proposed boundary modification). The maps and GIS data included in this request incorporate Montecito Water District's proposed jurisdictional boundary modification.

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

   • 3-018 CARPINTERIA
5. Provide the proposed name for the new basin(s) or subbasin(s)

   Not applicable

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)
   Carpinteria Valley Water District	3-018 CARPINTERIA
   Montecito Water District	3-049 MONTECITO , 3-018 CARPINTERIA
   Carpinteria Valley Water District	3-018 CARPINTERIA

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):

• CVWD Statuatory Authority Info.pdf (63kB) Uploaded on 09/21/2018 at 09:39PM

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

Attachment(s):

• Resolution 1046 Basin Boundary Mod.PDF (46.5kB) Uploaded on 09/21/2018 at 09:40PM

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):

• CGB_geologic_boundary_map_2018-09-22.pdf (2.6MB) Uploaded on 09/25/2018 at 09:14PM

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

Attachment(s):

• CGB_Boundary_Mod.zip (14.6kB) Uploaded on 10/02/2018 at 11:05AM

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

Attachment(s):

• CVWD_BBM_political_boundaries.zip (507.6kB) Uploaded on 09/25/2018 at 09:15PM

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

In review of CEQA, Basin Boundary modification does not constitute a "Project" under CEQA and is therefore not subject to CEQA. Given that the Basin Boundary adjustments do not meet the "Project" definition, there is no requirement to seek or make a finding for a Statutory or Categorical Exemption, nor provide any other CEQA treatment at all.

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.

The Carpinteria Groundwater Basin (CGB) is located on the south flank of the Santa Ynez Mountains, one of the east-west trending ridges of the Transverse Range Geomorphic Province. The basin represents the north limb of a structural syncline that has been filled with water-bearing sediments. In the CGB, water-bearing deposits include all unconsolidated and semi-consolidated sediments of Quaternary Age, with older consolidated non-water bearing rocks bounding the basin. Quaternary Age water-bearing basin deposits primarily consist of the following: - Alluvial Deposits - Carpinteria Formation - Casitas Formation - Santa Barbara Formation Tertiary Age formations that form the primary bedrock boundaries of the basin include the following: - Sisquoc Formation - Monterey Formation - Rincon Shale - Vaqueros Formation - Sespe Formation - Coldwater Sandstone The geologic contact between water-bearing deposits and non-water bearing bedrock formations delineate the northern, eastern and southeastern lateral boundaries and the definable bottom of the basin. The southwestern portion of the basin is bounded by the Pacific Ocean. The eastern boundary is represented by the jurisdictional boundary between the Carpinteria Valley Water District and the Montecito Water District. For this Basin Boundary Modification request, the most recent published geologic maps covering the basin area were utilized to refine the delineation of the basin boundaries based on the geologic contacts described above. These maps include the following: - Minor, S.A., Kellogg, K.S., Stanley, R.G., Gurrola, L.D., Keller, E.A., and Brandt, T.R. (2009), Geologic Map of the Santa Barbara Coastal Plain Area, Santa Barbara County, California: U.S. Geological Survey Scientific Investigations Map 3001. - Minor, S.A., and Brandt, T.R. (2015), Geologic Map of the Southern White Ledge Peak and Matilija Quadrangles, Santa Barbara and Ventura Counties, California: U.S. Geological Survey Scientific Investigations Map 3321.

F. Notice and Consultation

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

County of Santa Barbara County of Ventura Carpinteria Valley Water District Montecito Water District City of Carpinteria Casitas Municipal Water District

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

Interested local agencies and public water systems in the affected basin were already know as a result of the long history of groundwater management by Carpinteria Valley Water District (1996 AB 3030 plan). Carpinteria Valley Water District reached out to each affected local agency via telephone calls, emails, and letters. Carpinteria Valley Water District met with staff from the City of Carpinteria and County of Santa Barbara. In addition, the requesting agency has been conducting outreach and public education activities for a prior boundary modification request in 2016 and since draft basin re-prioritization results were released.

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.

(1) Each affected agency was contacted via telephone, email, and letter (letters attached). (2) Each affected agency and landowner was mailed a public notice (attached). (3) Carpinteria Valley Water District met with the City of Carpinteria and County of Santa Barbara on August 6, 2018.

Attachment(s):

• SGMA ltr agency BBMR City of Carp.pdf (2.7MB) Uploaded on 09/21/2018 at 10:30PM
• SGMA ltr agency BBMR MWD.pdf (2.7MB) Uploaded on 09/21/2018 at 10:30PM
• SGMA ltr agency BBMR VC WSP.pdf (2.7MB) Uploaded on 09/21/2018 at 10:31PM
• SGMA ltr agency BBMR Water Agency.pdf (2.7MB) Uploaded on 09/21/2018 at 10:31PM
• Public Hearing Notice - ad hoc Groundwater Cmte 091718 (003).pdf (85.8kB) Uploaded on 09/21/2018 at 10:32PM
• SGMA ltr agency BBMR Casitas.pdf (2.7MB) Uploaded on 09/21/2018 at 10:41PM

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 proposed basin boundary modification was discussed during two public meetings: (1) The August 22, 2018 Carpinteria Valley Water District Board of Directors meeting during which the authorizing resolution was adopted; and (2) The September 19, 2018 Carpinteria Valley Water District Ad Hoc Groundwater Committee meeting included a Public Hearing and Workshop concerning the proposed boundary modification.

Attachment(s):

• CVWD Regular Board Meeting Agenda 8-22-18.pdf (141.3kB) Uploaded on 09/21/2018 at 10:21PM
• Ad Hoc GW Cmte Basin Boundary Workshop 9-19-18.pdf (632.9kB) Uploaded on 09/21/2018 at 10:37PM

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.

No comments were received.

H. Local Support

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

Please see response to question F3.

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.

Santa Barbara County Montecito Water District

Attachment(s):

• Santa Barbara County BBMR Support Letter.pdf (308.6kB) Uploaded on 09/28/2018 at 12:23PM
• Montecito WD BBMR Support Letter.pdf (63kB) Uploaded on 09/28/2018 at 02:21PM

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

Not applicable. No comments of opposition were 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.

The attached technical memorandum describes the Hydrogeologic Conceptual Model. It is important to note that this technical memorandum (2011) pre-dates the current basin boundary delineation, which is based on the most recent published geologic maps (Minor, et al 2009 and 2015). As such, the geologic map and basin boundary presented on Plate 1 of the technical memorandum has been superseded by the new geologic maps and slightly revised basin boundary; however, the conceptual model of the basin has not changed and is still considered valid.

Attachment(s):

• 06-0125_TechMemo_Task1_20120221.pdf (8.5MB) Uploaded on 09/21/2018 at 10:47PM

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.

Please see attached map.

Attachment(s):

• CGB_geologic_boundary_map_2018-09-22.pdf (2.6MB) Uploaded on 09/25/2018 at 09:19PM
• SIM3001map.pdf (36.7MB) Uploaded on 09/28/2018 at 12:29PM
• sim3321_map.pdf (82.6MB) Uploaded on 09/28/2018 at 12:30PM

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.

The attached technical memorandum describes the subsurface data that demonstrates the vertical thickness and relevant physical properties of the alluvial aquifer. It is important to note that this technical memorandum (2011) pre-dates the current basin boundary delineation, which is based on the most recent published geologic maps (Minor, et al 2009 and 2015). As such, the geologic map and basin boundary presented on Plate 1 of the technical memorandum has been superseded by the new geologic maps and slightly revised basin boundary; however, the conceptual model of the basin has not changed and is still considered valid.

Attachment(s):

• 06-0125_TechMemo_Task1_20120221.pdf (8.5MB) Uploaded on 09/21/2018 at 10:53PM