bear trap dunes water treatment facility
DESCRIPTION
Bear Trap Dunes Water Treatment Facility. Report conducted by. KPC Water Team. S Team members Tim Sweany Trevor Irvine Thomas Burton Tyler Wingate S Experience 10 years combined experience in Water/Wastewater field. Mission. - PowerPoint PPT PresentationTRANSCRIPT
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Bear Trap Dunes Water Treatment Facility
Report conducted by
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KPC Water Team
S Team members– Tim Sweany– Trevor Irvine– Thomas Burton– Tyler Wingate
S Experience– 10 years combined experience in Water/Wastewater field
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Mission
KPC Environmental Group is an environmental company which performs water treatment consulting in Delaware.
• Purpose: Analyze Bear Trap Water Treatment plant– Determine compliance with regulations/ permits– Issue findings– Make Recommendations for possible improvements
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Bear Trap CustomersS Area Served– Bethany Bay/Ocean View System– One of Five water treatment plants
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Bear Trap CustomersS Population Served– 814 accounts in Bear Trap development– Seasonal occupancy (5,043 accounts system wide)• 3,992 Full time residents in system• 21,058 Transient residents from May-September
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Aerial View of Facility
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Facility Overview
S Construction Dates– Wells - April 2007– Plant - May 2008– Open - May 2008
S Wells– Well #1- 675 gpm– Well #2- 425 gpm– Water tower- 350,000 gal– Average production- 500,000 gpd– Maximum production- 775,000 gpd at 540 gpm– Maximum design production- 1,728,000 gpd
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TreatmentS Pre-filtration Chemical Addition– Caustic, Chlorine, & Potassium Permanganate
S Greensand Filtration– 3 Filtration units with 540 gpm total flow– 180 gpm per filter
S Post-Filtration Chemical Addition– Caustic, Chlorine (Disinfectant) &
Zinc Orthophosphate
S Filter Backwash– Stored in decant tank– Re-treated at 54 gpm
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Sampling, Testing and Data Recording
S Potassium Permanganate AnalyzerS Chlorine AnalyzerS pH AnalyzerS Chart Recorders– Chlorine– pH– Tower level– Decant tank level
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Operator Lab and Testing
S Distribution sample– Once per week
S Treatment plant sampling– Pre-filtration– Post-filtration (each filter)– Effluent• Chlorine• Iron• pH• Zinc
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Research and Regulations
S Operating Requirements– Operator visit three times per week
S Distribution System Monitoring Requirements– Monthly Bacterial 30 (May-Sept.)
4 (Oct.-April)– Lead and Copper 40 every six months– WQP2 6 every six months
S Facility Monitoring requirements– RIOC 1 every 9 years– RRAD 1 every 3 years– Fluoride and Nitrate 1 every year
S State of Delaware Drinking Water Branch
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Research and Regulations cont.S Monitoring Summary– System failed lead and copper (2009-2010)– Bear Trap Dunes area had no failures
S Water Characteristics Influent Effluent
Iron 2.0 - 2.5 mg/L 0.00 - 0.11 mg/L
pH 6.25 7.5 - 8.0
Temperature 15.3 - 17.2 °C 13.9 - 18.8 °C
Chlorine Residual None 1.0 - 1.5 mg/L
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Audit
S KPC conducted a facility audit/sanitary survey on 04/28/2012– Toured the plant– Asked operator questions– Viewed records
S Reviewed available permits Researched information about system on state
website
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Audit FindingsS Shower/Eyewash Station– Not clear of obstructions– Difficult to access in emergency
S Caustic Soda Tank– Not located in chemical room– Creates PPE issue in Filter area
S Confined Space– Decant Tank entry points not labeled as Confined Space
S Housekeeping
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Audit Findings
S Operations and Maintenance Manuals– Manuals provided by Tidewater are lacking key elements– They do not include Greensand units
S Standard Operating Procedures– Not yet created
S Plant Production– Rated for 1200 gpm– Produces 540 gpm
S Decant Tank Size– Inadequate– Must be pumped every six days
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Audit Findings
S Connection Discrepancy– State-6,804 connections– Tidewater-5,043 accounts
S Facility Walls– Made of plywood
S Weekly manual m-scope readings– Additional time– Possibility of contamination
S No PPE onsite
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RecommendationsS Shower/eyewash Station– Tank configuration re-ordering to allow access– Change location of eyewash station
S Caustic Soda Tank– Put in chemical room– Put exclusion zone around tank
S Confined Space– Add sign to all entrances
S Housekeeping– Allocate time for organization
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RecommendationsS Standard Operating Procedures– Create a book of SOP’s available for review at the facility
S Operations and Maintenance Manuals– The manuals should be revised to include information on
greensand units
S Plant Production– Missing out on production ability that you paid to receive– Possibility of future growth necessitates a solution
S Decant Tank Size– Additional tank– Expand existing tank
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RecommendationsS Weekly manual m-scope readings– Permanent level reading device with chartable readings
S Connection Discrepancy– Accounts vs. Connections
S Facility Walls– Add a dehumidifier– Replace walls with fiberglass reinforced plastic walls that
were described in design specifications
S No PPE onsite– Personal protective equipment at the facility
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Conclusion
Facility is in compliance with regulations
S Main issues to be addressed – Safety• Shower/eyewash station• Caustic soda tank location• Confined Space signs and SOP for sludge removal
– O&M Manuals• Need revision, and additions
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THE END