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Participation Trend Study Report Over the past few years, Eureka Recycling has transitioned away from doing participation studies by hand -counting the number of carts that are out in several 200 household areas throughout each city, and replacing that study with a citywide, digital participation study using data from our digital routing system. The study spans six weeks. Each time the truck tips a cart, that collection is recorded for that specific address. This data allows us to analyze all collection during a specific study period. The percentage of all addresses in each day's routes that register a tip in a given week is recorded as that week's set out rate, which is then averaged over the course of the study to calculate the city's set out rate. The reports for each collection day are then sorted by address and duplicates are removed for households that set out more than once during the study period or who have more than one cart. The remaining list of addresses represents all households that participated in recycling at least once during the study, to arrive at the participation rate for the city. There are some important things to remember when looking at this participation study data: • For both digital and hand count data, the data is based on a "per building" or "per address" basis. If a cart is out at a duplex or a triplex, we count that address as participating on that day, and if there is not a cart out we count the address as not participating. There is no way for us to know which units are using the cart or carts that are set out. Similarly, for a single family home with two carts, we still count them as one participating address regardless of how many carts are out for collection. • The "set out rate" is calculated by counting the number of addresses that set out a cart on each collection day, and taking the average of the number of carts set out each day during the six week study period. • The "Participation Rate" is calculated by counting the percentage of unique addresses that participated in the program at least once during the six week study period. Participation Trend Study Results for the Past Ten Years Roseville 2013 2014 2015 2016 2018 2019 2020 2021 2022 Set Out Rate 53% 76% 78% 77% 76% 75% 85% 77% 79% 77% Participation Rate 76% 93% 93% 94% 93% 92% 97% 96% 98% 95% Page 56 of 67