2005-07-26_PWETC_AgendaPacket - Laserfiche WebLink

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record set out (number of households with material out for collection on a given day) and participation rates (number of households that have material out for collection at some point during a period of time). The addresses were also compared to the Ramsey County property tax records and City of Roseville utility billing records to determine vacant properties that were deleted from the sample and to determine properties where residents were moving in or out. The properties in transition were deleted from the calculations in the period when people were moving in and/or out - typically one or two collection weeks. This ranged from zero to three properties in transition on anyone collection day. The average was 1.4 households in transition on Each household was assigned a title: Recycler, Not- Before, Non-Recycler and N9t-A.fter. Re?~cler means the household met the Partisipatiou;criteria in both the "before" and "during" phasys. 1'-I9t-f3efore means the household did not meet the "before" criteria, but did meetthecriteriajn the "d!lring" phase. Non meilPs the household didllotm-?et the criteriaju; either~he "before" or "during"phases. Not-After means the household met the criteria in the "before" period, but did not meet the criteria ill the "during" phase. To be considered a participant a household had to have material out for collection at least once during the two month "before" period and/or at least twice in the "during" phase. Table 2 Participation Categories Title Criteria Recycler - Material out at least once in "before" period and at least twice in "during" period Not-Before - Did not hav~material out in "before" period - Materi<:iIClufatJl8ast twice in "during" period Non-Recycler have materiaL.@t in "before" period Did not have material Clulat least twice in "during" period Not-After - Materj<:il out at least once in "before" period - Did nOlhave material out at least twice in "during" eriod Table 3 Participation Rate Formula Period Formula "Before" Period Recyclers/Sample Size (Recyclers + Not-Befores - Not- Afters)/Sample Size "During" Period The participation rate in the "pefore" period was determined by dividing the number of Recyclers by the sample size. The participation rate for the "during" phase was determined by adding the number of Recyclers and the Not-Befores (and when relevant subtracting the Not-Afters) and dividing the sum by the sample size. Weights Three weeks of data were compiled for the "Before" period. Five weeks of data were compiled for the "During" period, except for the Weekly area, for which nine weeks of data were compiled. Each truck was driven to the Waste Management/Recycle America Alliance MRF in Minneapolis and weighed. 14