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2009 BOH CONTINUANCE OF PUBLIC HEARING City of Salem - Board of Health Continuance of Public Hearing November 24, 2009 Salem Transfer Station Proposed Minor Mod cation to Existing Site Assignment Before .................................. After General 1. What is the purpose of tonight's meeting? Tonight's meeting Is a continuation of the public hearing held on November 10, 2009, as required by the Board of Health under the Massachusetts DEP's Site Assignment Regulations. The Board of Health is seeking public comment prior to granting or denying the request by the City and Northside Carting, Inc. to increase the allowable daily tonnage of the existing transfer station from 100 to 400 tons per day. 2. A residence located at 1 DiPietro Road was identified after some of the environmental studies were performed. Have the potential environmental impacts associated with the proposed expansion of the Transfer Station been assessed for this location? Yes; prior air quality and noise modeling results have been reviewed and we have and confirmed that projected Impacts to the residence at 1 DlPletro Road are well below MassDEP thresholds for mitigation measures. Nevertheless, since the last public meeting, Northside Carting has made formal arrangements to purchase the property at 1 Dipletro Road and the adjacent property at 3 Swampscott Road. The Purchase and Sale Agreement Is dated November 12, 2009. Traffic Concerns 3. At the initial public hearing, the accuracy of the existing traffic count and the profile of the vehicles using the transfer station were questioned. Specifically, it was mentioned that the estimated 140 vehicle trips (70 incoming and 70 outgoing vehicles) related to an annual average tonnage rate of 1 approximately 25 tons per day. What is the traffic related to the existing condition when 100 tons per day is delivered to the station? We first reviewed the records of actual tonnage delivered to the transfer station over the time period when the traffic counts were made (November 19 and 21, 2007). The average tonnage over the three-day period corresponding to the traffic counts was approximately 58 tons. We then reviewed the average daily tonnage rate over the oast four years and determined. based upon actual tonnage slips and annual reports to MADEP, that the average daily tonnage rate was 43.2 tons per day(TPD). In our estimate of the existing traffic calculations, we conservatively estimated that the existing traffic averages 50 TPD. Therefore, the additional tonnage delivered to (and transferred from) the transfer station on the peak day (500 TPD) is projected to Include larger vehicles (packer trucks and dump trailers). Reference is made to the attached updated traffic generation matrix. 4. It is anticipated that future developments will be implemented in this section of Salem. How will expansion of the transfer station impact such future developments? The additional traffic generated at the proposed transfer station is relatively small and only very minor impacts will be experienced In streets around the Swampscott Road area. In fact, all of the existing trash collection vehicles that are currently serving the area will remain under the future operating scenario. Rather than traverse other City streets to their current destination(s),they will be routed to the new transfer station. With respect to future traffic projections from new developments, site-specific mitigation measures may be required (i.e. additional turning lanes, pavement markings, signalization Improvements. etc.) Air Quality Issues 5. The review engineer retained by the Board of Health requested that the Air Quality Model be updated to include emissions from the proposed Transfer Station. Have the cumulative impacts of stationary and mobile sources of particulates been taken into account? The Air Quality Model was updated to Include emissions from the proposed Transfer Station, Including modeling a 10-foot high stack and increasing the truck trips from 194 truck trips per day to 230 truck trips per day to account for a dally peak of 500 tons per day. Results from this additional modeling show that the projected emission levels from the Transfer Station are negligible, compared to background and National Ambient Air Quality Standards (NAAQS). These results are shown on the attached Particulate Emissions Chart. 6. According to the DEP 2006 Guidance Manual, the total Stationary Source Emissions and Inventory System (SSEIS) VOC emissions should be considered from all point sources located within one mile of the transfer station. What volatile organic compound emissions are released from facilities within one mile of the transfer station? The DEP's SSEIS Database lists one facility (Thermal Circuits, Inc.) within one mile of the subject site. The annual VOC emissions from that facility for the most recent reporting year (2007) are 6.39 tons per year. According to the DEP air quality representative that was contacted, the additional VOC emissions from the proposed site will not have a perceptible impact on regional air quality. 2 r Otherlssues 7. At the last public meeting, concern was expressed regarding high groundwater table within two feet of the waste handling area ground surface. We have verified that the groundwater table Is located over 20 feet below the tipping floor where waste is handled and at least 9 feet from the bottom of the loading floor of the transfer station. 3 Salem Transfer Station Trip Generation Matrix Trips Est Avg. Existing Conditions Future Peak Conditions Tonnage Peak Hour* Avg. & Peak Day Peak How* Peak Day Dump Trucks Incoming 1 .7 3 26 3 26 Outgoing 0 4 26 4 26 Cars/Pick-Up Trucks Incoming - C&D 0.6 3 24 3 24 Incoming - Yard Wastes - 2 17 2 17 Outgoing 0 6 41 6 41 Packers Incoming 15.2 0 0 3 29 Outgoing 0 0 0 4 29 Dump Trailers Incoming 0 1 3 3 19 Outgoing 22.7 1 3 4 19 Subtotals...................................140.......................................90 Total Vehicles (Peak Day).......................................................230 "Peak traffic volume hour on a weekday which was found to occurr between 7:45 and 8:45 AM. Particulate Emissions from Proposed Transfer Station 160 - 140 - 120 - E 60140120E 100 c 0 80 w m 60 v 40 20 0 PM2.5 PM2.5 PM10 PM10 24-1-18H Annual 24-1-121-1 Annual ■ Proposed Transfer Station ❑ Background ■ NAAQS Notes: 1. Combined mobile and stationary sources modeled at closest residence. 2. The PMIO concentrations represent the highest second highest modeled concentrations, while the PMz e represents the highest 5"' highest concentrations predicted. 3. Annual concentrations represent highest maximum concentration.