San Diego County Municipal Code § 3.6 Infrastructure and Services

This section presents the projected water demand and wastewater generation estimates for the Camp Lockett Master Plan and Rezone. The estimates were developed from the anticipated zoning provided utilizing available County of San Diego standards and guidelines, or national guidelines where needed. This section is broken up by water and wastewater and describes the criteria used and the projected estimates. This section also presents next steps for specific projects to address water and wastewater capacity and service capability.

The County of San Diego Department of Public Works - Wastewater Management Section is responsible for operation and overall administration of the Campo Water Maintenance District, which is the water service provider to the Rancho Del Campo community. The Rancho Del Campo water system provides potable water to the Cottonwood Alternative School, Border Patrol Station, four apartment complexes, a health care facility, community center, sheriff station, Campo Road Station, a market, a lumber company, a church, Pacific Southwest Railway Museum, a Fire Station, a Senior Center, Post Office, a Veterans of Foreign Wars of the United States Facility, multi-family residential (3 units), and single- family residential (21 units). Existing conditions annual groundwater demand for the Rancho Del Campo water system is estimated to be 33.2 acre-feet per year (afy) based on average metered use from 2016 through 2019.

Additional water demand for proposed uses for the Master Plan was estimated at approximately 10,405 gallons per day (gpd), or 11.7 acre-feet/year (afy). Combining existing demand of 33.2 afy with proposed uses of 11.7 afy results in a combined total water demand of 44.9 afy.

Table 2 presents the estimated water demand by land use identifier with justifications of estimated quantities provided in footnotes.

Table 2 – Project Average Water Demands

Table 2 – Project Average Water Demands

1275 gpd/residence is a unit demand rate for residential land uses included the 2015 Padre Dam Municipal Water District Comprehensive Facilities Master Plan. This value was selected as near representative to Camp Lockett area as the Padre Dam Water District services rural County neighborhoods such as Lakeside, Blossom Valley, and Alpine.

260 gpd/unit assumes 2 people per day estimated for a developed campsite by the EPA (EPA, 2002)

34,374 gpd/acre based on the annual evaporation rate from Lake Morena Reservoir of 4.9 acre-feet/acre, City of San Diego, Water Department, Water Operations Division, 2006. Historical Reservoir Evaporation Data, 1916 through 2005.). 10 gpd/person is the use estimated for one person at a pool by the EPA (EPA, 2002).

4Nonresidential uses include MTM-1: Exhibit (30,360 sqft), PSRM-8: Retail (21,780 sq ft), SYH-1: Central Administration & Purchasing Area (2,175 sq ft), SYH-2: MHSC Facility Maintenance Center (2,372 sq ft), SYH-4: Homemaker Thrift Store (4,510 sq ft), SYH-6: Drug/Alcohol Services (8,142 sq ft), SYH-7: Wellness Center (8,267 sq ft), SYH-8: Theater (3,780 sq ft), SYH-9: Mixed Use Commercial (1,180 sq ft)

51,000 gpd/acre is a unit demand rate for non-residential land uses included the 2015 Padre Dam Municipal Water District Comprehensive Facilities Master Plan. This value was selected as near representative to Camp Lockett area as the Padre Dam Water District services rural County neighborhoods such as Lakeside, Blossom Valley, and Alpine.

6550 gpd/machine is based on estimated average water use for a washing machine by the EPA (EPA, 2002).

7This calculation does not reflect water demand associated with the reuse of the existing 17 housing units proposed by the SYH as they were previously analyzed as part of the 2011 General Plan Environmental Impact Report.

The County of San Diego Department of Public Works - Wastewater Management Section is responsible for operation and overall administration of the San Diego County Sanitation District, which is the wastewater provider in Campo. The sewer collection system and wastewater treatment system provide service to the Rancho Del Campo community and the adjacent 222-lot Campo Hills residential subdivision. Existing conditions annual wastewater generation for the wastewater treatment plant is estimated to be 45,000 gpd based on average daily use from 2016 through 2019.

Additional average wastewater generation for proposed uses for the Master Plan was estimated at approximately 7,810 gpd. Combining existing average flow of 45,000 gpd with proposed average flow of 7,810gpd results in a combined average wastewater flow of 52,810 gpd.

Table 3 presents the estimated wastewater generation by land use identifier with justifications of estimated quantities provided in footnotes.

Table 3 – Projected Average Wastewater Generation

Table 3 – Projected Average Wastewater Generation

1240 gpd/residence is a unit demand rate for residential wastewater generation included in the 2013 Campo Sewer Service Area Sewer Master Plan.

250 gpd/unit assumes 2 people per day estimate for a developed campsite by the EPA (EPA, 2002)

310 gpd/person is wastewater use estimated for one person at a pool by the EPA (EPA, 2002).

4Nonresidential uses include MTM-1: Exhibit (30,360 sqft), PSRM-8: Retail (21,780 sq ft), SYH-1: Central Administration & Purchasing Area (2,175 sq ft), SYH-2: MHSC Facility Maintenance Center (2,372 sq ft), SYH-4: Homemaker Thrift Store (4,510 sq ft), SYH-6: Drug/Alcohol Services (8,142 sq ft), SYH-7: Wellness Center (8,267 sq ft), SYH-8: Theater (3,780 sq ft), SYH-9: Mixed Use Commercial (1,180 sq ft)

5500 gpd/acre of non-residential use is a unit demand rate for residential wastewater generation included in the 2013 Campo Sewer Service Area Sewer Master Plan.

6550 gpd/machine is based on estimated average water use for a washing machine by the EPA (EPA, 2002).

7This calculation does not reflect water demand associated with the reuse of the existing 17 housing units proposed by the SYH as they were previously analyzed as part of the 2011 General Plan Environmental Impact Report.

The projected water demand and wastewater generation estimates for the Master Plan are approximately the same amount as the existing water and wastewater systems service now. The projections are based on general criteria and reflect what can conservatively be expected overall. Detailed water and wastewater system assessments will be necessary, followed by significant improvements of the existing assets. As individual development projects are developed, each project will need to estimate its water demand and wastewater generation based on more detailed information and demonstrate that the existing water and wastewater systems have the capacity and capabilities to service the development project, or identify what specific improvements to existing water and sewer infrastructure will be required.