Town of Cape Charles Local Government Costs for Cleaning up the Chesapeake Bay VML Annual Conference,

Background Small town on the eastern shore. Small town on the eastern shore. Approx. 1,000 full time residents; 1,600 w/part timers. Approx. 1,000 full time residents; 1,600 w/part timers. Approx. 1,200 ERCs; 150K gpd ADF. Approx. 1,200 ERCs; 150K gpd ADF. Potential growth to over 5,000 ERCs. Potential growth to over 5,000 ERCs. Existing 28 year old package WWTP. Existing 28 year old package WWTP. 250K gpd design capacity, no nutrient removal capability. 250K gpd design capacity, no nutrient removal capability.

Waste Load Allocation (WLA) Designated for dual design flows: 250K or 500K. Designated for dual design flows: 250K or 500K. Town opted for 250K due to poor economy. Town opted for 250K due to poor economy. Resultant WLA: 3,046 lbs TN; 228 lbs TP. Resultant WLA: 3,046 lbs TN; 228 lbs TP. Growth beyond 250K would require: Growth beyond 250K would require: 1. Additional WLA (unlikely). 2. Advance in technology. 3. Water reuse.

New WWTP Membrane Bio Reactor. Membrane Bio Reactor. 250K gpd design flow. 250K gpd design flow. Infrastructure (structures, piping, electrical, etc.) built to accommodate expansion to 500K gpd at modest cost. Infrastructure (structures, piping, electrical, etc.) built to accommodate expansion to 500K gpd at modest cost. 300K+ gpd by adding additional membrane cassettes. 300K+ gpd by adding additional membrane cassettes.

Cost of Nutrient Removal Cost of design, engineering and construction of new WWTP is approximately $18,585,000. Cost of design, engineering and construction of new WWTP is approximately $18,585,000. WQIF eligibility of 57%: $10,614,000. WQIF eligibility of 57%: $10,614, % WQIF reimbursement: $7,961, % WQIF reimbursement: $7,961,000. Cost to the Town: $2,653,000. Cost to the Town: $2,653,000.

Water Reuse Categories 9VAC25-740, Water Reuse Regulations 9VAC25-740, Water Reuse Regulations Urban, Level 1, Unrestricted Access - irrigation of public areas, nonresidential toilets, fire fighting/suppression, outdoor domestic use, commercial car washes and air conditioning. Urban, Level 1, Unrestricted Access - irrigation of public areas, nonresidential toilets, fire fighting/suppression, outdoor domestic use, commercial car washes and air conditioning. Crop Irrigation Crop Irrigation Level 1 - food crops not commercially processed. Level 2 - commercially processed food crops, nonfood crops and turf.

Water Reuse Categories Landscape Impoundments Landscape Impoundments Level 1 - potential for public access or contact. Level 2 - no potential for public access or contact. Construction, Level 2 - soil compaction, dust control, washing aggregate, making concrete. Construction, Level 2 - soil compaction, dust control, washing aggregate, making concrete. Industrial Industrial Level 1 - commercial laundries. Level 2 - livestock watering, aquaculture, stack scrubbing, street washing, boiler feed, ship ballast, once- through cooling, recirculating cooling towers. Level 2 - livestock watering, aquaculture, stack scrubbing, street washing, boiler feed, ship ballast, once- through cooling, recirculating cooling towers.

Water Reuse Options WWTP will do better than Level 1. WWTP will do better than Level 1. Bayshore Concrete Products – half mile, but low volume demand and distribution system needed within plant. Bayshore Concrete Products – half mile, but low volume demand and distribution system needed within plant. Agricultural – two miles, limited to growing season, multiple parcels and owners. Agricultural – two miles, limited to growing season, multiple parcels and owners.

Water Reuse Options Selected Bay Creek Resort & Club. Selected Bay Creek Resort & Club. Two golf courses with extensive interconnected lake system for storm water management and irrigation supply. Two golf courses with extensive interconnected lake system for storm water management and irrigation supply. Lakes have capacity to receive effluent year round. Lakes have capacity to receive effluent year round. About half a mile to system entry point. About half a mile to system entry point.

Cost of Water Reuse Design and engineering: $85,000 Design and engineering: $85,000 Modification to WWTP: $177,000 Modification to WWTP: $177,000 Pipeline to lake system ~ $250,000 Pipeline to lake system ~ $250,000 Total estimate of capital cost: $512,000 Total estimate of capital cost: $512,000 Negligible O&M cost – gravity conveyance to lake system. Negligible O&M cost – gravity conveyance to lake system. Working with DEQ for regulatory approval. Working with DEQ for regulatory approval.

Conclusions Cost impact of nutrient removal is significant, particularly with a small customer base. Cost impact of nutrient removal is significant, particularly with a small customer base. Water reuse can be an effective way to deal with WLA constraints. Water reuse can be an effective way to deal with WLA constraints. Cost to implement reuse dependent on: Cost to implement reuse dependent on: 1. Quality of treated effluent. 2. Potential customers. 3. Geography.