2019-085-E Solid Waste - Kessler Consulting Recycling comp study

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DocuSign Envelope ID:60890E67-6F1D-48BF-9BD4-7E57F52CDE30 Orange County,North Carolina RFP#5253 for Recycling Composition Study Section 5: Project Approach Number of Samples As described in the protocol, KCI is proposing to conduct the RCS over 5 consecutive days during which up to 55 samples of single stream recyclables will be pulled and hand sorted, for an average of 5 samples from each of the 11 programs included in the RCS. A minimum of 3 samples is required to calculate a 90%confidence interval. Based on KCI's experience with analyzing RCS data, a sample size of 5 will in most cases produce statistically relevant 90%confidence intervals for major categories of recyclable materials. For programs with less tonnage and for programs that deliver fewer than 5 loads of recyclables during the week, KCI may pull fewer than 5 samples or may pull multiple samples from a load. KCI will work with County and UNC staff to develop a program-specific sampling schedule. The greater the number of samples,the greater the level of accuracy and the narrower the 90% confidence interval. Therefore, KCI offers an alternative proposal to conduct a 6-day sorting event (Monday-Saturday) during which up to 66 samples would be sorted,for an average of 6 samples per program. Material Categories KCI has reviewed the material categories listed in the RFP and proposes a few modifications to the list of materials for the RCS. KCI has extensive experience working with single stream MRFs and processing equipment, material markets and specifications, and processing contracts. Our proposed categories incorporate the critical recyclable commodities that single stream MRFs can produce and market. For example,the industry standard for a single stream MRF is to produce three paper commodity streams: corrugated cardboard, mixed paper, and newspaper. Our methodology aligns with these and will determine the inbound composition for these three materials. Our categories also align with the material types accepted in the County's program. For example, #2, #4, and #5 plastics are separate from other resin types since the County does not accept#3,#6, and #7 plastics. We have also separated PET, HDPE-colored, and HDPE-natural bottles into separate categories as these materials have very different market values and many single stream MRFs process these into separate commodity streams. KCI has also modified the list of contaminants in the material categories provided in the RFP. The material categories proposed by KCI incorporate contaminants that are important to the operation of a MRF (such as wet fiber), while also informing the County about the major types of contaminants within the recycling stream (such as organics and hazardous waste). Furthermore, KCI will perform a count, in addition to weight, of some of these more critical contaminants, such as tanglers and bagged materials, as often it is the number of these rather than the percent by weight that affects the processing operation. KCI is fully amenable to working with the County to modify and refine the material category list to meet the goals of the County and is willing to use the list of materials in the RFP. As this is the list we used in the recent WCS we conducted for the County,we are very familiar with the materials and are capable of sorting into these categories. As mentioned previously, please see Attachment A for KCI's proposed Sampling and Sorting Protocol, which includes a sampling schedule and material categories list, and Attachment B for our proposed Site Safety Plan. kessler consulting inc. Proposals 2018\Orange Co Proposal-final 32 innovative waste solutions