- Slides: 20
Grease Traps, Liquid Waste Haulers, and You Cynthia Arias Pollution Control Coordinator
City of Carrollton’s Liquid Waste Ordinance • Identify generators and haulers in the city • Prevent the illegal disposal of nonhazardous liquid waste, • Eliminate sanitary sewer blockages and overflows, • Protect public health and the environment
Who is a Generator? A person who causes, creates, generates, or otherwise produces liquid waste • Restaurants/Food Establishments • Automotive Repair/Service Stations • Car Washes • Industry • Apartments
What is liquid waste? • Water-borne solids, liquids, gaseous substances derived from sources, such as, but not limited to grease traps, grit traps, chemical/portable toilets, septic tanks and/or washwater operations.
Who needs a grease trap? • Heavy prep – requires a 1000 gallon trap • Light prep – requires a 500 gallon trap Sizing is based on menu, appliances, and types of cooking methods
Do I need to upgrade? • What if the establishment has no trap or the trap is smaller than the one now required for that type of establishment? – What causes a new trap to be installed • • Change of ownership Remodel History of violations Changes in menu served
A grease trap / interceptor
A recently pumped trap
Your Requirements as a Liquid Waste Generator • Must not allow liquid waste to accumulate • Service traps at least quarterly or as required for proper function • Use a City of Carrollton permitted liquid waste hauler - CAR ### • Make sure hauler uses a City of Carrollton Trip Ticket • Supervise the hauler during pickup
Overdue for pumping
Your Requirements as a Liquid Waste Generator Cont… • Entire contents of trap must be cleaned and walls scraped • Retain your copy of trip ticket on the premises for at least three years • Two copies – yellow at the end of the pumping and a green final copy
Pumping Frequency • Traps are required to be cleaned and pumped completely empty ever 90 days – Exception to the rule • Less than 25% of the weighted height of the interceptor as measured from the bottom to the invert of the outlet pipe • The interceptor will produce an effluent, based on defensible analytical results, demonstrating consistent compliance with established local discharge limits determined by the POTW (publicly-owned treatment works)
Why? • Frequent and regular pumping of a trap is our best defense in keeping grease and other liquid waste out of the city’s sewer line.
How Do I Obtain A Variance? • Intent of seeking a variance must be received in writing • Must use a Dipstick Pro to obtain accurate readings to take weekly measurements that are to be witnessed by Environmental Services • It is up to the food establishment to make all arrangements to prove that pumping can be delayed without compromising the trap • Depending on conditions may be able to have a pumping frequency of up to a maximum of 180 days
Closures • Grease traps /interceptors must be pumped before abandoning the property.
Clean Outs • Make sure cleanout caps are intact and screwed into sewer line. • Any broken or missing caps need to be replaced.
Remember… If you generate any type of liquid waste • Educate your employees on how to properly dispose of fats, oils and grease along with other waste products.