Conducting Grease Trap Inspections

Narragansett Bay Commission Kerry M. Britt Pretreatment Manager Travis H. Costa Senior Pretreatment Technician Narragansett Bay Commission

Field’s Point in Providence Bucklin Point in East Providence 45 MGD 22 MGD NBC Pretreatment Program

1,522 discharge permits in effect On averagg,e conduct 2,000 inspections/year Conduct approximately 50 investigations/year 10% - 20% regarding grease issues NBC Grease Control Program

Been in place since the late 1980s 850 Permitted companies with the ppggotential to discharge grease laden wastewater Restaurants Schools Nursing Homes Hospitals Hotels Supermarkets Food Processors Permit Requirements Discharge Limits Grease Removal Eqqpuipment Record Keeping Monitoring Notification of Changes Grease Removal Requirements Meet NBC discharge limitation of 125.0 ppm Su bm it p lans d etaili ng ki tch en l ayout, plumbing and grease removal equipment IllInstall grease removal li equipment wi ihlth sample port AtAutomati tiEltc Electro/M /Mhechani cal Outdoor In-ground Passive MitiMaintain all pret reat ment equi pment tt to ensure continuous operation Automatic Electro/Mechanical GRU

Sized ppproperl y Sample port Solids Retention AiblAccessible Fixtures required to be connected Pre-Rinse Sinks Pot Wash Sinks Three-Bay Sinks Soup Kettles Wok Stations Floor Drains Automatic Electro/Mechanical GRU (’d)(cont’d) Prohibited Discharges to GRU Dish Washer Garbage Grinders/Disposals Vegetable Prep Sinks Steam T abl es Sanitary Sinks IMhiIce Machines Freezer Condensate Automatic Electro/Mechanical GRU (’d)(cont’d) Log Books Maintenance Emptying Strainer Basket Cleaning Wiper Blades Cleaning Trough WVWet Vacuum ing of fGRU GRU Amount of Grease Removed from unit DdifiiDate and time of inspection Person conducting inspection Outdoor Inground Passive Grease Interceptor

Sizing: 15 gal/seat but no smaller than 500 gal Accessible sampling tee w/ 8” diameter GI must be accessible Fixtures required to be connected: Pre-Rinse Sinks Soup Kettles Pot Wash Sinks Wok Stations Three-Bay Sinks Dish Washers Vegetable Prep Sinks Garbage Grinders/Disposals Floor Drains OuOutdootdoor In gr oun d P assive G rease Int teercep ceptotor (co nt’ td)

Prohibited Discharges to GI Sanitary Ice Machines Freezer Condensate Record Keeping Thickness of Grease Layer Pump-Outs including volume Receipts from pump-outs DdifiiDate and time of inspection Person conducting inspection Inspection Program

Conduct inspections of 75% of restaurants annually Inspect all other companies with the potential to discharge grease ldladen wastewater bi - annually Inspection Program (cont’d)

Prior to inspection Review company information 9 Permit 9 CdCorrespondence 9 Plans Gath er E quip me nt fo r inspect io n o f G R U/GI 9 Hand Tools 9 Cover Hook 9 Bottle Brush 9 Camera 9 PPE Inspection Program (cont ’d)

At location 9Verify owner and contact information 9Verify plans for accuracy 9Review maintenance records Inspection Program (cont’d) Automatic Electro/Mechanical GRU

OtltOutlet

Strainer Basket Skimmer Wheel

Wiper Blades

Inlet Sample Port

Timer Unit Grease Container Inspection Program (cont ’d) GRU Inspection 9Open unit 9Inspect grease layer 9Remove strainer basket 9Inspect wiper blades , trough , skimmer wheel for integrity 9Ensure drainage hose is connected to waste grease reservoir Inspection Program (cont ’d)

9 Check Timer Operation 9 Proper time 9 Proper cleaning cycle settings 9 Manually override timer to start the unit ensuring the unit operates properly 9 If not operating check to see if power is supplied 9 Inspect sample port 9 Open Valve 9 Clean if necessary 9 Return to initial condition and close unit Inspection Program (cont ’d) Inspection Program (cont’d) Outdoor Inground Passive Interceptor Inspection Program (cont ’d)

GI Inspection 9Open manhole covers 9Inspect samplfifle tee for signs of grease 9Try to determine the thickness of grease and solids layers 9Close interceptor Inspection Program (cont’d)

Post Inspection At location 9 Review findings with contact person 9 Respond to questions At office 9 Enter inspection in the PT computer system 9 Write detailed memo to the company file 9 Write de tail ed le tte r to the co mp any Conduct future follow up inspections in accordance with SOPs and as necessary NBC - Sustainable Energy Management Pract ices for Wastewater Treatment Fac ilit ies

Wastewater Treatment Facilityygy Energy Focused Management System – Modeled after ISO 14001 EMS –Energy Measurement – Energy Efficiency/Conservation – Use of Renewable Energy

Environmental Results Program for Restaurants and Food Service Industry Sector – Use of FOG BMPs – Promote the use of waste grease as a source of renewable energy Poorly Operating Automatic GRU Blockage due to poor maintenance on Passive In-Ground Grease Traps Grease from food preparation facilities caused blockages in a sewer line No Power to Automatic GRU Contact Information

Email: [email protected] [email protected] Telephone: 401.461.8848 ext. 490

NBC We bs ite: www.narrabay.com Pretreatment Information: http://www.narrabay.com/pretreatment.asp