Community College of Rhode Island

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Sewage Pretreatment Plans

Pretreatment, Permit and Sampling Information

Introduction

The Federal Government through the provisions of the General Pretreatment Regulations (40 CFR, part 403) requires that local Sewer Authorities establish procedures for the enforcement of pretreatment standards and requirements. The terms of the agreements between CCRI and its local sewer authorities are summarized in this document.

  • The Narragansett Bay Commission (NBC) through its Pretreatment Program has required the Community College of Rhode Island to apply for Wastewater Discharge Permits, to install pollution prevention equipment and barriers and to conduct periodic self-monitoring tests at its Flanagan (Lincoln) Campus.
  • The Warwick Sewer Authority (WSA) has likewise required CCRI to obtain two Industrial pretreatment Program Wastewater Discharge Permits for its Warwick (Knight) Campus, to install pollution prevention equipment and to conduct periodic self-monitoring.
  • Industrial User Wastewater Discharge Permit No. NPT-013-06 was issued to the CCRI Newport County Campus on August 22, 2006.

See the testing requirements for each campus below.

Knight Campus

400 East Avenue
Warwick, RI 02886
Telephone: (401)825-1000
Warwick Sewer Authority Industrial Waste Pretreatment Program

Wastewater Discharge Permit NO. 759
Science Laboratories and Photography Darkrooms
Issued June 1, 2008 - Expires May 31, 2013

Wastewater Discharge Permit NO. 1217
Dining Services Kitchen
Issued July 17, 2006 - Expires May 31, 2011

Under Industrial Pretreatment Wastewater Discharge Permit No. 759, issued June 1, 2008, the Community College of Rhode Island works with the Warwick Sewer Authority (WSA) to ensure that CCRI's laboratory and photography darkroom sewage discharges stay within the limits imposed by the WSA. Under Wastewater Discharge Permit No. 1217, issued July 17, 2006, CCRI works to keep grease and other discharges from the dining services kitchen within WSA limits. In keeping with the terms of the permits, CCRI contracts with an independent laboratory for semi-annual self-monitoring of wastewater from selected Knight Campus operations. Scheduled testing is done every April and October on discharges from the East Wing limestone tank which receives sewage from the Biology Department laboratories, the West Wing limestone tank which receives sewage from the Chemistry Department laboratories and on discharges from the Art Department student darkroom on the fourth floor. The original test results and a written report are submitted to the Warwick Sewer Authority after each round of testing. The WSA is also empowered to make unannounced visits to the facility and to conduct spot checks of sewage discharges at any time.

Silver and pH are the only two parameters monitored at the student photography darkroom location. The following eleven parameters are tested in the discharge from the Chemistry and Biology Department laboratories:

  • Cadmium
  • Chromium
  • Copper
  • Lead
  • Mercury
  • Nickel
  • Silver
  • Zinc
  • Chemical Oxygen Demand
  • pH
  • Total Toxic Organics.

Table I shows the Warwick Sewer Authority effluent limits, usually expressed in parts per million, for a wide range of contaminants, not all of which are part of CCRI's self-monitoring requirements.

Specific questions on Warwick Sewer Authority effluent limits and regulations may be directed to BettyAnne Rossi, Pretreatment Coordinator and Laboratory Director at 401-468-4726, bettyanne.rossi@warwickri.com or to Steven Miller, Pretreatment Inspector at 401-468-4723, steven.d.miller@warwickri.com.

Table I
Warwick Sewer Authority Self Monitoring Report Requirements
Wastewater Discharge Permit NO. 759
Parameter Maximum Effluent Discharge Limit mg/L
Sb - Antimony 0.50 ppm
As - Arsenic 0.10 ppm
Be - Beryllium 0.10 ppm
Cd - Cadmium 0.05 ppm
Cr - Chromium (total) 0.50 ppm
Cu - Copper 0.70 ppm
CN - Cyanide (total) 0.20 ppm
Pb - Lead 0.15 ppm
Hg - Mercury 0.03 ppm
Ni - Nickel 0.50 ppm
Se - Selenium 0.20 ppm
Ag - Silver 0.05 ppm
Tl - Thallium 0.10 ppm
Zn - Zinc 1.00 ppm
BOD - Biochemical Oxygen Demand 1000 ppm
COD - Chemical Oxygen Demand 5000 ppm
O&G - Oil and Grease 100 ppm
pH -.(minimum – maximum) 6.0-9.0 s.u.
°C - Temperature (maximum – 150 °F) 66 °C
TSS - Total Suspended Solids 1000 ppm
TTO - Total Toxic Organics (TTO) 0.58 ppm

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Flanagan Campus

1762 Louisquisset Pike
Lincoln, RI 02865
Telephone: (401) 333-7000
Narragansett Bay Commission

Wastewater Discharge Permit # P8602-174-0809
Issued October 22, 2004

On October 22, 2004 the Flanagan Campus of CCRI was issued Wastewater Discharge Permit P8602-174-0809 for its discharges into the Narragansett Bay Commission's sewer system. A copy of this permit, which expires August 31, 2009, may be obtained from the Chemical Safety Coordinator. CCRI cooperates on a continuing basis with the Narragansett Bay Commission (NBC) to ensure that CCRI's sewage discharges stay within the limits imposed by the NBC. In keeping with the terms of the discharge permit, CCRI contracts with an outside independent laboratory to test the Flanagan Campus sewage discharges every April and October for silver concentrations and pH. Scheduled testing is done on the discharge pipe of the final radiography processing mix tank (Module 1 basement) and the discharge pipe of the final student darkroom photo processing mix tank (Module 3 first floor). The original test results and a written report are submitted to the Narragansett Bay Commission after each round of testing. The NBC is also empowered to make unannounced spot checks of sewage discharges at any time.

Tables II and III show the Narragansett Bay Commission effluent limits, usually expressed in parts per million, for a wide range of contaminants, most of which are not presently part of CCRI's self-monitoring requirements.

Specific questions on Narragansett Bay Commission effluent limits and regulations may be directed to Jonathan Chaffee, Engineering Technician at 401-461-8848, extension 490.

Table II
Narragansett Bay Commission Effluent Limits
Parameter Limitation (maximum)
Total Toxic Organics (TTO) 2.13 ppm
Biochemical Oxygen Demand (BOD5) 300 ppm
Total Suspended Solids (TSS) 300 ppm
Total Oil and Grease (fats, oils and grease) 125 ppm
Oil and Grease (mineral origin) 25.0 ppm
Oil and Grease (animal/vegetable origin) 100 ppm
pH Range (at all times) 5.0 – 10.0
Table III
Narragansett Bay Commission Effluent Limits
Parameter Daily Maximum
(composite for one day)
Average
(10 days)
Cadmium (Total) 0.11 ppm 0.07 ppm
Chromium (Total) 2.77 ppm 1.71 ppm
Copper (Total) 1.20 ppm 1.20 ppm
Cyanide (Total) 0.58 ppm 0.58 ppm
Lead (Total) 0.60 ppm 0.40 ppm
Mercury (Total) 0.005 ppm 0.005 ppm
Nickel (Total) 1.62 ppm 1.62 ppm
Silver (Total) 0.43 ppm 0.24 ppm
Zinc (Total) 2.61 ppm 1.48 ppm

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Liston Campus

One Hilton Street
Providence, RI 02905
Telephone: (401) 455-6000
Narragansett Bay Commission

Wastewater Discharge Permit # P8600-239-1112
Issued August December 1, 2007

On December 1, 2007, the Liston Campus of CCRI was issued Wastewater Discharge Permit # P8600-239-1112 for its wastewater discharges into the Narragansett Bay Commission's sewer system. A copy of this permit, which expires on may be obtained from the Chemical Safety Coordinator

Under the conditions of the Liston Campus permit, CCRI has prepared a Toxic Organic/Solvent management (TO/SM) Plan which describes how the college limits the use of toxic organic compounds in the Liston Campus laboratories and arranges for their proper disposal. A copy of the Toxic Organic/Solvent Plan may be obtained from the Chemical Safety Coordinator. Under the terms of the permit, the installation of a grease removal device in the cafeteria kitchen has also been arranged.

No self-monitoring of sewage by an outside laboratory is required at the Liston Campus under the terms of the present Wastewater Discharge Permit. However, the Narragansett Bay Commission is empowered to make inspections and to test wastewater at any time. The discharge limits for the Liston Campus are the same as those shown in Tables II and III for the Flanagan Campus.

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Newport County Campus

One John H. Chafee Boulevard
Newport, RI 02840
Telephone: (401) 851-1600
EarthTech

Industrial Pretreatment Program

250 Connell Highway
Newport, RI 02840
Telephone: 401-845-2000

Industrial User Wastewater Discharge Permit No. NPT-013-06 was issued to the CCRI Newport County Campus on August 22, 2006. ( A copy of this permit, which expires September 1, 2009, may be obtained from CCRI's Chemical Safety Coordinator.)

The Community College of Rhode Island cooperates fully with the City of Newport Public Works Department to ensure that CCRI's sewage discharges stay within the limits imposed by the. In keeping with the terms of the permit, CCRI contracts with an outside independent laboratory for semi-annual self-monitoring of wastewater from the biology laboratory limestone tank. Testing is scheduled for each April and October on discharges from the tank which receives sewage from the Biology Department laboratories. The original test results and a written report are submitted to the Public works Department after each round of testing.

The table below shows effluent limits imposed by EarthTech, expressed in parts per million unless otherwise noted, for a wide range of organic and inorganic contaminants.

Table IV
Earthtech Self Monitoring Report Requirements
Parameter Discharge Limits
Daily Average
Parts per million or mg/L
Cadmium 0.04 ppm
Chromium 1.71 ppm
Copper 1 ppm
Lead 0.1 ppm
Silver 0.24 ppm
Zinc 1.2 ppm
Nickel 2 ppm
Cyanide 0.65 ppm
pH 5.5 to 10.5 standard units
Mercury 0.06 ppm
Arsenic 0.12 ppm
Total Toxic Organics (TTO) 2.13 ppm
Biological Oxygen Demand (BOD) 300 ppm
TSS 300 ppm
Total Petroleum Hydrocarbons (TPH) 2 ppm
Gold 3 ppm
Iron 15 ppm
Tin 0 ppm
Metals not Mentioned 2 ppm
Sulfides 100 ppm
Sulfates 500 ppm
Fluoride 5 ppm
Mercury chloride (as mercury) 0.5 ppm
Phenols (not to exceed) 1 ppm
Solvents 0 ppm
Total Oil and Grease 100 ppm

Specific questions on City of Newport effluent limits and regulations may be directed to the Newport Industrial Pretreatment Program at 401-845-2000, ext. 101.

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CCRI's Efforts Toward Water Pollution Prevention

Success in achieving sewage discharge compliance at all four campuses of CCRI has been achieved through extensive cooperation among the administration, the academic departments that create hazardous wastes, the physical plant directors and the Chemical Safety Coordinator.

In the photography darkrooms at the Knight and Flanagan Campuses, waste chemicals such as developer and fixer from the developing of pictures are collected in Satellite Accumulation Areas for disposal by a licensed hazardous waste contractor. The large volumes of wash water generated in print developing are processed through silver recovery systems to keep even low levels of silver from being discharged into the sewer.

Where directed by the Warwick Sewer Authority and the Narragansett Bay Commission, floor drains in selected mechanical areas and laboratory preparation/storage rooms have been capped to keep accidentally spilled toxic materials from entering the sewage system.

Biology and Chemistry Department faculty and paraprofessionals have been trained to prevent discharge of toxic materials into the sewers. Laboratories are equipped with absorbing devices and materials to keep accidentally spilled toxic materials out of the floor drains. Heavy metals and toxic organic compounds have been eliminated entirely from some biology and chemistry laboratory experiments. Other experiments have been scaled down to reduce the generation of hazardous waste and the potential for toxic pollutant discharges. Biology and chemistry laboratory students receive as part of their laboratory safety training specific instructions in the proper disposal and collecting of hazardous wastes.

Almost all elemental mercury has been removed from the college to minimize the risk that spilled mercury will find its way into a drain pipe. There are no mercury-containing thermostats in the buildings. All mercury containing barometers and most mercury monometers have been removed from laboratories. The few manometers that remain are protected by secondary containment in case of breakage or spill. All mercury thermometers have been replaced by alcohol-in-glass or digital thermometers. Most sink drain traps have been inspected for mercury droplets and for other chemical residues.

All wastes from experiments that use heavy metals and toxic organic compounds are collected in specially marked containers and stored in Satellite Accumulation Areas as described in CCRI's Hazardous Waste Management Training. Wastes are stored in Satellite Accumulation Areas or in Main Waste Storage Area in accordance with federal and state laws until they are removed from the premises by a licensed hazardous waste contractor.

In June 2001, the Community College of Rhode Island received an Environmental Excellence Award from the Narragansett Bay Commission for pollution prevention work at its Providence and Lincoln campuses. Visit CCRI's Environmental Safety Award page to read about this achievement.

Sewage pretreatment questions pertaining to all CCRI campuses may be sent to CCRI's Chemical Safety Coordinator at eterezakis@ccri.edu.

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Last Updated: 2/10/14