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NYC Watershed/ Tifft Science & Technical Symposium September 19, 2013

Investigation of Alternative On-Site Sewage Disposal Systems (OSSDS) Capable of Meeting Effluent Total Nitrogen Requirement of 10 mg/l or Less. NYC Watershed/ Tifft Science & Technical Symposium September 19, 2013. INTRODUCTION.

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NYC Watershed/ Tifft Science & Technical Symposium September 19, 2013

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  1. Investigation of Alternative On-Site Sewage Disposal Systems (OSSDS) Capable of Meeting Effluent Total Nitrogen Requirement of 10 mg/l or Less NYC Watershed/Tifft Science & Technical Symposium September 19, 2013

  2. INTRODUCTION • Suffolk County Department of Health Services Alternative OSSDS study to investigate systems capable of treating wastewater to total nitrogen levels less than 10 mg/L. • Investigation broken down into two flow categories: • Single-family residential dwellings: 300 - 1,000 gpd • Other than single-family residential dwellings: 1,000 – 30,000 gpd • Study organization (process of elimination): • Task II – Research • Task IV – Selection, Evaluation, and Sampling • Task VI – Cost and Benefit analysis • Task VIII – Investigation of Alternative OSSDS installations in four (4) states of MA, RI, NJ, and MD • Task IX – Summary report

  3. TASK II - RESEARCH • Purpose: Research and review of alternative OSSDS technologies capable of treating wastewater flows to effluent TN levels of 10 mg/L. • Research • Over 60 websites • Product brochures • Case study reports • Research paper • National Sanitation Foundation (NSF) 245 Standards for Nitrogen Removal • Database created for SCDHS

  4. TASK IV – SELECTION, SAMPLING, AND EVALUATION • Purpose: Selection, sampling and evaluation of alternative OSSDS recommended for further consideration. • Verified system manufacturers’ claims of performance • Broken down into 2 subtasks: • Task IV (A) – Evaluation and selection of alternative technologies • Task IV (B) – Field sampling of currently installed systems

  5. TASK IV (A) • 18 technologies selected from 13 manufacturers • Letters were sent out requiring: • List of available models and sizes for each selected technology • Location of installations • Available performance data for each installed system • Technical drawings • Based on submissions the list of acceptable technologies was reduced to 4.

  6. TASK IV (A) ? 63 18 4 2 (Residential) 4 (Commercial)

  7. TASK IV (A) AquaPoint – Bioclere® System

  8. TASK IV (A) BioMicrobics – MicroFAST® System BLOWER WASTEWATER INFLUENT TREATED EFFLUENT MICROFAST® UNIT PRIMARY ZONE SECONDARY ZONE

  9. TASK IV (A) WesTech – STM - AerotorTM Process Tank Clarifier

  10. TASK IV (A) FILTER POD Waterloo Biofilter, inc. – Waterloo Biofilter® SeptiTech, inc. – SetpiTech® System Orenco System, Inc. – Advantex® System Lombardo Associates, Inc. – NitrexTM System PROCESSOR TANK BIOTUBE FILTER WASTEWATER INFLUENT TREATED EFFLUENT WIRE MESH BASKET SOLIDS PUMP-BACK RECIRCULATION PUMP DECANT CHAMBER

  11. TASK IV (B) Independent Operators Homeowners/ Commercial Property • Sampling Coordination System Manufacturer CDM H2M CDM Field Engineers Sampling Phase Lab Analysis Data Coordination and Analysis Reported to SCDHS Shipment Prepare Bottles: BOD, TSS, TKN, TN H2M Labs

  12. TASK IV (B) • Location of systems samples: • Massachussetts, Maryland, Minnesota, California • Influent and effluent grab samples • Parameters analyzed included: Alkalinity, BOD, TSS, & TN • Average TN Concentrations - Residential Dwellings • Average TN Concentrations - Commercial Applications

  13. TASK VIII - Investigation OF installations in four (4) states of Ma, RI, NJ, and MD • Purpose: Investigate and evaluate the conditions and restrictions set for the installation of alternative OSSDS in Massachusetts, Rhode Island, New Jersey, and Maryland. • Restrictions and items evaluated: • Buffer distance requirements • Minimum lot size requirements • Operator service contract requirements • Sampling, testing, and reporting • Effluent requirements for installed systems

  14. TASK VIII – REQUIREMENTS SET FOR THE INSTALLATION

  15. TASK VI - COST AND BENEFIT ANALYSIS • Purpose: Cost and benefit analysis of alternative OSSDS recommended for use in Suffolk County in both residential and commercial applications. • Cost: • Quotes from system manufacturers and local manufacturers were obtained. • Costs of systems were based on criteria established if the systems were to be installed in Suffolk County. Residential System Costs

  16. TASK IX -CONCLUSIONS AND RECOMMENDATIONS • Future Work • Further study and modeling are necessary to further evaluate the alternative on-site sewage disposal systems. • In depth analysis considering fluctuations in influent strength and inconsistent flow patterns.

  17. Questions?SCDHS Website: http://www.suffolkcountyny.gov/Departments/HealthServices Presented by: Eliora Bujari 575 Broad Hollow Road, Melville, New York 11747 t 631.756.8000 f 631.694.4122 175 Pinelawn Road, Suite 308, Melville, New York 11747 t 631.756.8000 f 631.393.6322 11 Computer Drive West, Suite 102, Albany, New York 12205 t 518.621.7558 f 518.621.7658 254 South Main Street, Suite 500, New City, New York 10956 t 845.499.2264 f 845.499.2265 119 Cherry Hill Road, Suite 200, Parsippany, New Jersey 07054 t 862.207.5900 f 973.334.0507 www.h2m.com architects+engineers

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