SUSSEX COUNTY’S WASTEWATER FACILITIES
ENGINEERING DEPARTMENT – MICHAEL IZZO, P.E. DIVISION OF ENVIRONMENTAL SERVICES HEATHER L. SHERIDAN, DIRECTOR RODNEY T. MARVEL, ASSISTANT DIRECTOR RESPONSIBLE FOR THE PROPER OPERATION AND MAINTENANCE OF SUSSEX COUNTY’S WATER AND WASTEWATER FACILITIES 2 WATER DISTRICTS-DEWEY BEACH, INDUSTRIAL AIRPARK 24 SEWER DISTRICTS 4 WASTEWATER FACILITIES 461 PUMPING STATIONS 68,750 TOTAL EDU’S SERVED APPROXIMATELY 240,650 CUSTOMERS 84 EMPLOYEES MANAGERS WASTEWATER OPERATORS ELECTRICIANS MECHANICS PUMPS STATION TECHNICIANS HEAVY EQUIPMENT OPERATORS MAINTENANCE WORKERS PURCHASING AGENT COMMUNICATION SUPERVISOR SCADA TECHNICIANS
SUSSEX COUNTY OWNED & OPERATED WASTEWATER TREATMENT FACILITIES TREATMENT PLANTS DESIGN YEAR STARTED CAPACITY SOUTH COASTAL REGIONAL 9.0 MGD 1976 WASTEWATER FACILITY INLAND BAYS REGIONAL 2.1 MGD 1992 WASTEWATER FACILITY PINEY NECK REGIONAL 0.2 MGD 1993 WASTEWATER FACILITY WOLFE NECK REGIONAL 4.0 MGD 1995 WASTEWATER FACILITY
ADDITIONAL SANITARY SEWER DISTRICTS • ELLENDALE, INDUSTRIAL AIRPARK & GOLF VILLAGE – TREATED BY TOWN OF GEORGETOWN • BLADES – TREATED BY CITY OF SEAFORD • WOODLANDS – TREATED BY TOWN OF MILLSBORO • DEWEY BEACH & HENLOPEN ACRES – TREATED BY CITY OF REHOBOTH
SOUTH COASTAL REGIONAL WASTEWATER FACILITY 9.0 MGD ACTIVATED SLUDGE TREATMENT SYSTEM DISCHARGES TREATED EFFLUENT TO ATLANTIC OCEAN. PRESENTED WITH O & M EXCELLENCE AWARD FROM EPA REGION III IN 1998 & 2007
SOUTH COASTAL REGIONAL WASTEWATER FACILITY – SERVES FENWICK IS, BETHANY, S. BETHANY, N. BETHANY, CEDAR NECK, HOLTS LANDING, JOHNSON’S CORNER, MILLER CREEK, MILLVILLE, OCEAN VIEW, SEA COUNTRY ESTATES, SOUTH OCEAN VIEW PERMIT LIMITS EFFLUENT CONCENTRATIONS FLOW 9.0 MGD AVERAGE 4.5 MGD (summer) 2.5 MGD (winter) TOTAL CHLORINE 1.0-4.0 MG/L 1.0 -4.0 MG/L PH 6.0-9.0 STD UNITS AVG 6.9 BOD 15 MG/L AVG 23 MG/L MAX AVG 3.6 MG/L MAX 6.9 MG/L TOTAL SUSPENDED SOLIDS 15 MG/L AVG AVG 3.5 MG/L MAX 8.7 MG/L 23 MG/L MAX ENTEROCOCCUS DAILY AVG 10 COL/100 ML AVG <1 MAX < 3.0
SOUTH COASTAL REGIONAL WASTEWATER FACILITY’S OCEAN OUTFALL BEACH VIEW AERIAL VIEW
SOUTH COASTAL’S OCEAN OUTFALL • CONSTRUCTION BEGAN 1977 • TOTAL CONSTRUCTION COST $7,880,000 • DISCHARGE TO ASSAWOMAN CANAL 5/6/77-5/24/79 • DISCHARGE VIA OCEAN OUTFALL 5/24/79 • 6,670 LINEAR FEET • HYDRAULIC CAPACITY IS 22 MGD • 30” STEEL PIPE TRANSITIONS TO 24” WYE • EACH WYE IS 212’ WITH 20 FOUR INCH DIFFUSERS • DEPTH OF WATER AT DIFFUSERS 45- 50’ • PROTECTED WITH COATING AND CATHODIC PROTECTION SYSTEM • TOWN OF SELBYVILLE DISCHARGES TREATED EFFLUENT THROUGH OUTFALL. TOWN IS ALLOCATED 2 MGD CAPACITY
INLAND BAYS FACILITY – SERVES LONG NECK, OAK ORCHARD & ANGOLA
INLAND BAYS FACILITY - 2.1 MGD BIOLOGICAL NUTRIENT REMOVAL TREATMENT SYSTEM LAND APPLICATION ON 432 ACRES OF FARMLAND
INLAND BAYS REGIONAL WASTEWATER FACILITY – SPRAY IRRIGATION ON 432 AC PERMIT LIMITS EFFLUENT CONCENTRATIONS FLOW MGD AVERAGE 2.65 MGD 0.7 MGD TOTAL CHLORINE 1.0-4.0 MG/L AVG 2.3 MG/L PH 5.5-9.0 STD UNITS AVG 7.0 STD UNITS BOD 50 MG/L AVG AVG 5.85 MG/L MAX 8.3 MG/L TOTAL SUSPENDED SOLIDS 90 MG/L AVG AVG 11 MG/L MAX 22 MG/L FECAL COLIFORM DAILY AVG 200 COL/100 ML AVG 2.2 MAX 3.5 SODIUM AVG ANNUAL LESS THAN 250 YEARLY AVG 187 CHLORIDE AVG ANNUAL LESS THAN 210 YEARLY AVG 104 TOTAL NITROGEN TO FIELDS 250 LBS/AC/YR 38 LBS/ACRE/YR
PINEY NECK REGIONAL WASTEWATER FACILITY SERVES DAGSBORO & FRANKFORD 0.2 MGD FACULTATIVE LAGOON TREATMENT WITH LAND APPLICATION ON 55 ACRES OF FARM LAND AND LOBLOLLY PINES 12 MG STORAGE LAGOON
PINEY NECK REGIONAL WASTEWATER FACILITY – SPRAY IRRIGATION ON 57 AC PERMIT LIMITS EFFLUENT CONCENTRATIONS FLOW MGD AVERAGE 0.2 MGD 0.13 MGD TOTAL CHLORINE 1.0-4.0 MG/L AVG 2.0 MG/L PH 5.5-9.0 STD UNITS AVG 7.3 STD UNITS BOD 50 MG/L AVG AVG 23 MG/L MAX 28 MG/L TOTAL SUSPENDED SOLIDS 90 MG/L AVG AVG 11 MG/L MAX 26 MG/L FECAL COLIFORM DAILY AVG 200 COL/100 ML AVG <1.0 MAX 1.0 SODIUM AVG ANNUAL LESS THAN 250 YEARLY AVG 107 CHLORIDE AVG ANNUAL LESS THAN 210 YEARLY AVG 88 TOTAL NITROGEN TO FIELDS 300-350 LBS/ACRE/YR 120 LBS/AC/YR
WOLFE NECK REGIONAL WASTEWATER FACILITY 4.0 MGD FACULTATIVE LAGOON TREATMENT SYSTEM WITH LAND APPLICATION ON 306 ACRES OF FARM LAND OWNED BY DE STATE PARKS
WOLFE NECK NECK REGIONAL WASTEWATER FACILITY – SPRAY IRRIGATION ON 306 AC PERMIT LIMITS EFFLUENT CONCENTRATIONS FLOW MGD AVERAGE 3.1 MGD 1.56 MGD TOTAL CHLORINE 1.0-4.0 MG/L AVG 2.0 MG/L PH 5.9-9.0 STD UNITS AVG 7.5 STD UNITS BOD 50 MG/L AVG AVG 10.3 MG/L MAX 20 MG/L TOTAL SUSPENDED SOLIDS 90 MG/L AVG AVG 14.3 MG/L MAX 25 MG/L FECAL COLIFORM DAILY AVG 200 COL/100 ML AVG <1.0 MAX 3.0 SODIUM AVG ANNUAL LESS THAN 250 YEARLY AVG 80 CHLORIDE AVG ANNUAL LESS THAN 210 YEARLY AVG 80 TOTAL NITROGEN TO FIELDS 396 LBS/AC/YR LBS/ACRE/YR 240
SPRAYED EFFLUENT MONITORING REQUIREMENTS: Parameter: Unit Measurement: Monitoring Frequency: Sample Type: Ammonia Nitrogen mg/L Monthly Composite BOD mg/L Twice Per Month Composite Cadmium mg/L Annually Composite Chloride mg/L Quarterly Composite Copper mg/L Annually Composite Effluent Flow Gal/day Continuous Recorded/Totalized Fecal Coliform Col/100 ml Twice Per Month Grab Lead mg/L Annually Composite Nickel mg/L Annually Composite Nitrate + Nitrite Nitrogen mg/L Monthly Composite Organic Nitrogen mg/L Monthly Calculation pH S.U. Daily In-situ Potassium mg/L Quarterly Composite Sodium mg/L Quarterly Composite Total Nitrogen mg/L Monthly Composite Total Phosphorus mg/L Monthly Composite Total Residual Chlorine mg/L Daily Grab Total Suspended Solids mg/L Twice Per Month Composite Zinc mg/L Annually Composite
GROUND WATER MONITORING REQUIREMENTS: Parameter Measurement Frequency Sample Type Ammonia as Nitrogen mg/L Quarterly Grab Chloride mg/L Quarterly Grab Depth to Water hundreths of a foot Monthly In-Situ Dissolved Oxygen mg/L Quarterly Field Test Fecal Coliform Col/100mL Quarterly Grab Nitrate + Nitrite a mg/L Quarterly Grab pH S.U. Quarterly Field Test Sodium mg/L Quarterly Grab Specific Conductance uS/cm Quarterly Field Test Temperature *C Quarterly Field Test Total Dissolved Solids mg/L Quarterly Grab Total Nitrogen mg/L Quarterly Grab Total Phosphorus mg/L Quarterly Grab INLAND BAYS HAS 28 MONITORING WELLS WOLFE NECK HAS 10 MONITORING WELLS PINEY NECK HAS 15 MONITORING WELLS
SOIL MONITORING REQUIREMENTS Unit Parameter Measurement Measurement Frequency Sample Type pH S.U. Annually Soil Composite Organic Matter % Annually Soil Composite Phosphorus (as P205) mg/kg Annually Soil Composite Potassium mg/kg Annually Soil Composite Sodium Adsorption Ratio meq/100g Annually Soil Composite Cadmium mg/kg Once per 4 years Soil Composite Nickel mg/kg Once per 4 years Soil Composite Lead mg/kg Once per 4 years Soil Composite Zinc mg/kg Once per 4 years Soil Composite Copper mg/kg Once per 4 years Soil Composite Cation Exchange Capacity meq/100g *Only if soil pH changes significantly Soil Composite **Only if soil phosphorus levels Phosphorus Adsorption meq/100g become excessive for plant growth Soil Composite Percent Base Saturation % *Only if soil pH changes significantly Soil Composite
SPRAY FACILITIES ADDITIONAL PERMIT REQUIREMENTS • QUANTITY OF EFFLUENT SHALL NOT EXCEED 0.25 IN/AC/HR. • SPRAY IRRIGATION ACTIVITIES SHALL CEASE WHERE GROUNDWATER LIES WITHIN 2 FEET OF GROUND SURFACE • NO SPRAYING ON FROZEN GROUND • BUFFER ZONES: 150’ FROM HIGHWAYS, LOTS & PROPERTY LINES 50’ FROM WETLANDS OR STREAMS 100’ FROM ALL OTHER AREAS
CHALLENGES WITH OPERATING SPRAY IRRIGATION FACILITES • WEATHER – 2013 we had 61” rain. For Wolfe Neck Facility this added 80 MG to lagoons. (48 acres of lagoons*27,154 g/”) • FARMING OPERATIONS • SOIL CONDITIONS • EXTENSIVE MAINTENANCE ON RIGS
BIOSOLIDS SOUTH COAST FACILITY PRODUCES 1,000 DRY TONS CLASS A PRODUCT USING LIME AND PASTURIZATION. PRODUCT IS USED BY LOCAL FARMERS. INLAND BAYS PRODUCES CLASS B PRODUCT WHICH IS APPLIED TO PERMITTED LAND ADJACENT TO FACILITY.CURRENTLY IN DESIGN PHASE TO UPGRADE TO CLASS A PRODUCT.
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