COFFEE SHOPS IMPACT ON THE WATER RENEWAL SYSTEM By: Zach Conde, City of Boise Pretreatment Program
AREA OF IMPACT Population 223K in the City of Boise 25K In the City of Eagle 12K In the City of Garden City Total of 265K in our area 2
PUBLICLY OWNED TREATMENT WORKS (POTW) 900 + miles of pipe within the City West Boise Water Renewal Facility Current design flow is 24 million gallons per day (MGD) Typical flow is 17 MGD Lander Street WRF Design flow is 17 MGD Typical flow is 11 MGD Current total system design flow ~40 MGD Typical flow is 28 MGD Biological plants FOG impacts West Boise Lander 3
PRETREATMENT PROGRAM TODAY 4
ORG CHART 5
INTERJURISDICTIONAL AGREEMENTS EAGLE 6
SIGNIFICANT INDUSTRIAL USERS 17 total SIUs in jurisdictional area 15 in Boise 1 in Garden City 1 in West Boise Sewer District 0 in Eagle Sewer District 7
MINOR INDUSTRIAL USERS Restaurants Breweries Auto Shops Machine Shops 8
DENTAL PRACTICES 9
STORMWATER Hotline Complaints, Airport MS4, High Risk Industrial, Routine Inspections 10
OTHER TASKS...COFFEE SHOP STUDY 11
COFFEE SHOPS Prior to 2015 no grease abatement required for stand alone coffee shops Why would they need grease abatement? It s JUST COFFEE!! 12
DOWNSTREAM ACCUMULATIONS In 2015, our crews & other local districts staff started routinely finding fats, oil and grease accumulations in City main sewer lines 13
OTHER MUNICIPALITIES KENNEWICK, WA 14
FACTORS We know other municipalities have required all coffee shops to install grease abatement We know our UM crew, and other local districts are finding FOG Maybe they do need grease abatement Need data to back up need for grease abatement before starting to require it 15
COFFEE SHOP STUDY We decided to collect our own data to find out if coffee shops do have an impact on our water renewal system 16
99 total stand alone coffee shops COFFEE SHOPS 82 in Boise 9 in Garden City 8 in Eagle 17
7 COFFEE SHOPS WERE CHOSEN Garden City West Boise Eagle Boise CS#1 CS#3 CS#6 CS#5 CS#2 CS#4 CS#7 18
QUALIFYING SHOPS Only shops with existing exterior grease interceptors (1500 gallons) 19
DATA COLLECTED March August 2017, monthly inspections Checked grease interceptor for loadings, monitor accumulations Obtained cleaning records to ensure adequate cleaning schedule Discussed various BMP questions, drinks per day, hours of operation, etc. 20
Inches F.O.G. IN PRIMARY CHAMBER 40 CS#1 CS#2 CS#3 CS#4 CS#5 CS#6 CS#7 35 30 Needs Cleaned 25 20 15 10 5 0 March April May June July August 21
Drinks per Day DRINKS PER DAY 1200 1000 800 600 400 200 0 CS#1 CS#2 CS#3 CS#4 CS#5 CS#6 CS#7 22
Gallons AVERAGE GALLONS DOWN DRAIN PER DAY 9 8 7 6 5 4 3 2 1 0 CS#1 CS#2 CS#3 CS#4 CS#5 CS#6 CS#7 23
Cleanings per Year ANNUAL CLEANING FREQUENCY 7 6 5 4 3 2 1 0 CS#1 CS#2 CS#3 CS#4 CS#5 CS#6 CS#7 24
HIGHEST VOLUME OF FOG DISCHARGE CS#4 CS#6 CS#7 1000 drinks per day 800 drinks per day 1000 drinks per day 5 gallons down per day 7.8 gallons down per day 3 gallons down per day Clean GI 6x annually Clean GI 2x annually Clean GI 2x annually 25
COFFEE SHOP STUDY RESULTS All facilities have accumulations of FOG in grease interceptors Highest output facility loads a 1500 gallon grease interceptor in 2 months They do have an impact! Variable loadings Many factors could lead to the variability BMPs connections to GI # of drinks served etc. 26
NEXT STEPS Now that we know Coffee Shop FOG exists, and has potential to impact the water renewal system, what is next? More information is needed! 27
AREA WIDE SURVEY 28
COFFEE SHOP SURVEY 29
CONTACT INFORMATION 30
#1 & #2 - SPECIALTY COFFEE DRINKS 1. Does your facility make specialty coffee drinks? (If no, skip questions #2 - #15, sign, date, and submit. If yes, continue to question #2.) 2. How many specialty coffee drinks does your facility make on average per day? 31
QUALIFYING COFFEE SHOPS Yes Make coffee drinks other than drip coffee Espresso drinks, milk coffee drinks, creamer coffee drinks, blended coffee drinks, etc. No Cook food on site Only make drip coffee 32
#3 & #4 GREASE ABATEMENT 3. Does your facility have grease abatement equipment installed (grease trap, grease interceptor, electro-mechanical device, etc.)? (If no, skip questions #4-#10. If yes, continue to question #4.) 4. What type of grease abatement equipment do you have (please include type, capacity, location, etc.)? 33
GREASE ABATEMENT - GREASE INTERCEPTOR 34
GREASE ABATEMENT GREASE TRAP 35
GREASE ABATEMENT ELECTRO-MECH. DEVICE 36
#5 & #6 CLEANING PRACTICE 5. Is your grease abatement equipment cleaned in house or contracted out? 6. If contracted out, who is the contractor? 37
#7, #8 & #9 CLEANING FREQUENCY 7. How frequently is your grease abatement equipment cleaned? 8. What date was your grease abatement equipment last cleaned? 9. Do you keep a record of all grease abatement equipment cleanings? (If yes, please attach a copy of your cleaning log and/or record of recent cleanings.) 38
RECORD KEEPING 39
#10 FIXTURES CONNECTED 10. Please list all fixtures that are connected to your grease abatement equipment (sinks, sprayers, floor drains, floor sink, mop sinks, etc.). 40
#11 & #12 RINSE SPRAYER 11. Does your facility utilize a rinse sprayer to clean specialty coffee drink making equipment (blenders, frothing pitchers, cups, etc.)? 12. If yes, how many sprayers does your facility utilize? 41
#13 & #14 DUMP POLICIES 13. Please explain your facility s policy to dump milk, creamers, coffee drinks, etc. down the drain after a certain period? 14. What quantity (gallons) of milk, creamers, bad coffee drinks, etc. are poured down the drain on average per day? 42
#15 OTHER BEST MANAGEMENT PRACTICES 15. Please list and explain any other best management practices your facility has implemented to avoid discharges of fats, oil, and grease down the drain. (If more space is needed, please attach on separate sheet of paper.) 43
QUALIFIED SIGNATORY *Qualified signatory: General Office manager or Senior technical staff designated by a proprietor, partner or corporate officer to handle regulatory affairs and/or manage contracts for services necessary for the routine operation of the facility. Name (print) Title Signature Date 44
SENT TO ALL 99 COFFEE SHOPS Cover letter to explain why we are doing the survey Included web address for online survey option Only one attempt 45
27/99 SURVEYS RETURNED In Person 8 Responses 30% Call 2 Responses 7% Mail 8 Responses 30% Online 5 Responses 18% Email 4 Responses 15% Total is 27 Total of 27 Facilities 46
DO THEY QUALIFY? 8 Do Not Quality 19 Do Quality No No 30% (11) Yes 70% Yes Total is 27 Total of 27 Facilities 47
NUMBER OF DRINKS PER DAY Total of 6130 drinks per day at the qualifying facilities 201-500 # (4) 21% 200 or Less 58% More Than 500 21% # Total is 27 Total of 19 Facilities 48
DO THEY HAVE GREASE ABATEMENT? 9 Do Not Have Grease Abatement 10 Have Grease Abatement No 47% Yes 53% Total is 27 Total of 19 Facilities 49
GREASE ABATEMENT TYPE Grease Trap 20% 0% Electro Mechanical Device Grease Interceptor 80% Total is 27 Total of 10 Facilities 50
GALLONS OF WASTE DOWN DRAIN PER DAY Total of 40 gallons of waste per day dumped at the qualifying facilities 1.1 to 5 47% More Than 5 1 or Less 48% 5% Total is 27 Total of 19 Facilities 51
WASTE DOWN DRAIN Of the 27 respondents Over a month that is 1,200 gallons Over a year that is 14,400 gallons 52
WASTE CAPTURED IN GREASE ABATEMENT 33% 13 Gallons Not Captured 67% 27 Gallons Captured in Grease Abatement Total of 40 Gallons 53
WITHOUT GREASE ABATEMENT Of the 27 respondents, 9 do not have grease abatement 13 gallons per day Over a month that is 390 gallons Over a year that is 4,680 gallons 54
POTENTIAL FROM NO RESPONSE FACILITIES 72 Surveys were not returned Average of ~2 gallons per day per facility If none of the 72 have grease abatement potentially another 144 gallons per day Another 4,320 gallons per month Another 51,840 gallons per year +4,680 gallons (know do not have grease abatement) =56,520 gallons of potential impact =10+ Milk Trucks! 55
WHAT DID WE LEARN? LARGE POTENTIAL FOR IMPACTS! GREASE ABATEMENT NEEDED! 56
WRITE A WHOLE NEW PRETREATMENT CODE? 57
BOISE MUNICIPAL CODE TITLE 8 CHAPTER 14 BMC 8-14-04.02 A. No user shall contribute or cause to be discharged, directly or indirectly, any of the following described substances into the POTW: 5. Any solid or viscous substances which will or may cause obstruction to the flow in a sewer or other interference with the operation of the wastewater system, such as, but not limited to: grease 58
MOVING FORWARD Grease abatement is required for any coffee shop remodel and/or new construction Grease abatement is required for existing coffee shops when fats, oil and grease is found in City main line downstream of their facility 59
2018 PLAN REVIEWS We have had 3 coffee shop new construction plan submittals, and required grease abatement for all 3 60
WIN FOR THE COLLECTION & WATER RENEWAL SYSTEMS 61
QUESTIONS? 62
HOME OF BOISE STATE UNIVERSITY 3-0 AGAINST UNIVERSITY OF OREGON DUCKS IN FOOTBALL 63
inches Inches F.O.G. IN PRIMARY CHAMBER 40 CS#1 CS#2 CS#3 CS#4 CS#5 CS#6 CS#7 35 30 Needs Cleaned 25 20 15 10 5 0 March April May June July August 64
HIGHEST VOLUME OF FOG DISCHARGE CS#4 CS#6 CS#7 1000 drinks per day 800 drinks per day 1000 drinks per day 5 gallons down per day 7.8 gallons down per day 3 gallons down per day Clean GI 6x annually Clean GI 2x annually Clean GI 2x annually 65
TIMELINE - PRETREATMENT PROGRAM 1970 - Environmental Protection Agency (EPA) Established 1972 Clean Water Act (CWA) Passed 1978 EPA Promulgated 40 CFR 403.5(b) Specific Prohibitions. In addition, the following pollutants shall not be introduced into a POTW: (3) Solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW resulting in Interference 66
BOISE MUNICIPAL CODE TITLE 8 CHAPTER 14 Suitable and adequate grease abatement February 2006 - Fats, Oil and Grease (FOG) BMPs for Food Service Establishments May 1 st, 2007 Council formally adopts the EPA Streamlining Rule BMPs in lieu of numerical limits 67
REQUIRED FOG BMPS Clean Grease Interceptor every 60-90 days, unless less frequent schedule can be demonstrated Keep records on site and ready for inspection. Clean Passive Grease Trap weekly, unless less frequent schedule can be demonstrated Clean Electromechanical Automatic Traps solids strainer daily, wiper blades weekly, and deep clean quarterly 68