Emerald Ventures Project No DRAFT FOR DISCUSSION PURPOSES-- HVAC ODOR CONTROL DESIGN CRITERIA

Transcription

1 PART 1 - HVAC ODOR CONTROL 1.1 GENERAL --DRAFT FOR DISCUSSION PURPOSES-- HVAC ODOR CONTROL DESIGN CRITERIA A. This document describes the standards for odor control for the building and requirements that will be incorporated into the final design. The document describes mitigation devices and design criteria to minimize and reduce odor leaving the building to the outside atmosphere. B. The design criteria will emphasize the goal of attaining high factors of odor reduction by controlling room pressures, utilizing odor reducing devices and controlling exhaust form building in both intended and unindebted exhaust streams. C. Controls and instrumentation monitor and control room pressures. These systems will also have 24hr instantaneous monitoring of control parameters and data acquisition of these parameters. The control system will also provide building engineers and cultivation monitors with alarms when these systems are out of design operating parameters. D. The monitoring systems will display to 24/7 operators for response to alarms and any equipment malfunctions. 1.2 STANDARDS 1. American Standard and Test of Materials a. ASTM D Standard Test Method for Apparent Density of Activated Carbon b. ASTM D Standard Test Method for Particle Size Distribution of Granular Activated Carbon c. ASTM D Standard Test Method for Total Ash Content of Activated Carbon d. ASTM D Standard Test Method for Moisture in Activated Carbon e. ASTM D Standard Test Method for Carbon Tetrachloride Activity of Activated Carbon f. ASTM D Standard Test Method for Volatile Matter Content of Activated Carbon Samples 2. United Laboratories a. UL 867 Electrostatic Air Cleaners - Latest Edition 3. Charlton (local) a. Odor limit at the property line to be based on comparable industry standards 1.3 EQUIPMENT A. Greenhouse recirculation Air 1. Plasma Air Systems a. Approved Plasma Ionization units are 1) Plasma Air. 2) Air Oasis 3) Ecosmart

2 4) AtmosAir 5) Filterr 6) Or Engineer Approved Equal b. Reductions in TVOC by Plasma Ionization for equipment shall be 98% in a one hour period. Producing Particulate size of 2 micron and larger. c. Post filtration shall be HEPA 99.97% of 0.3 micron and larger effective. 2. Bacteria/Mold Control B. Exhaust Air a. Supply air systems will be designed to accommodate the cooling and dehumidification to prevent mold and bacteria growth within the grow rooms. 1. Greenhouse Exhaust Fans a. The greenhouse exhaust fan will have silencers and filters installed on the outlet for noise and odor mitigation. Fans shall be push thru filter. Table 1: Exhaust Fan Schedule Manufacturer / Air Flow Model (cfm) Quantity 2, Fan Motor E.S.P (in W.G) (HP) -Based Upon Final Carbon Filter Selection - 2. Greenhouse, Extraction, Drying, Packaging - Carbon Filters Table 2: Carbon Filter Performance Condition Bed Velocity Max (Ft/min) 1) Carbon Bed Performance Air Flow (cfm) Dia. Length Carbon Bed Depth Inlet & outlet Plenum length Pressure drop (in H2O) Accessories Vibration Isolation Mounts Inlet and outlet conn Dia (in ) Cleaning Efficiency (as measured by TVOC) 98% Maximum Average % Minimum % 3. Sample ports a. Sample ports shall be 2 inch NPS threaded with ball valve for sampling of air flowing thru carbon bed. b. Four (4) sample ports shall be located perpendicular to air flow 1) One (1) in inlet of filter plenum 2) One (1) in outlet of filter plenum 3) One (1) 1/3 the depth of bed

3 4) One (1) 2/3 the depth of bed. c. These sample ports shall have full diameter spargers running thru bed to take samples traversing bed. These shall be 2 inch in diameter with 2 millimeter holes drilled every 90 degrees circumferential on pipe every 6 inches. d. Manways shall be installed in inlet and outlet plenum to allow for replacement of bed the top manways for backing bed shall be min 30 inch in diameter to allow for removal and placement carbon bed and allow for proper leveling of bed. 4. Approved Vendors a. Monroe Environmental b. Calgon Carbon Corporation c. Emcel Filters d. ERG Filters e. Lunto Filters f. Or Engineer Approved Equal 5. Carbon Media a. Size 3-6 mil b. Type Granular or pellet c. Carbon Tetrachloride, wt % 60 (min) d. Moisture, wt% 5 (max) e. Hardness Number 90 (min) f. Ash, wt % 14 (max) g. <6 US Mesh (3.35mm) (pellet), wt% 5(max Miscellaneous exhaust fans outside the grow area (ex. bathroom exhaust ) will include carbon filters. 6. General Building Exhaust a. Shall be sized based upon individual room requirements b. Performance shall meet those indicated in Table 2 with exception of physical size. c. Carbon Media shall be as specified in B.4 Above. d. Approved Vendors as above or Engineer Approved Equal 7. Pre- filter systems a. Pleated HEPA filter with 99% to remove 1 micron and greater. 1.4 ODOR MITIGATION PRACTICES A. The following practices shall be included in the training of all employees on-site with access to rooms with odor 1. Air locks 2. Close all doors between grow rooms and office areas 3. Automatic door closers on all heavy duty door to ensure doors are always closed 4. Filter testing and replacement schedules

4 5. Air quality sensor alarms to alert when odor has escaped from the exhaust or into occupied spaces. 6. Quality Control Monitoring and inspection to ensure all implemented procedures are being followed. All deviations must be reported immediately. PART 2 - SITE EXHAUST INFORMATION 2.1 EXHAUST AREA DIMENSIONS A. The site includes separate buildings. Table 1 below shows the exhaust air flow required at each building. Table 3: Building Dimensions & Exhaust Length (ft) Width (ft) Area Grow Area Exhaust Flow Greenhouse , ,000 11,800 Greenhouse , ,000 11,800 Greenhouse , ,000 11,800 Greenhouse , ,000 11,800 Greenhouse , ,000 11,800 Greenhouse , ,000 11,800 Propagation & Vegetation , ,000 11, OVERALL EXTERIOR EXHAUST: A. See Figure 1 Exhaust air location plan for Valley Green Grow site in Charlton Massachusetts. B. Exhaust terminal locations shall be optimized based upon air modeling to allow for the best distribution of exhaust and maximize dilution for site prevailing winds as determined by air model. Figure one is draft which will be sued to develop initial model runs.

5 Figure 1. Plan View of the site showing planned locations for the greenhouse exhaust locations N

6 PART 3 EXECUTION A I) SITE TESTING Filter and Room Testing a) Testing will be performed as a measure of VOC in parallel with Odor panel tests and test range on TVOC will be as follows and recorded to Odor panels test. b) Equipment to be used for TVOC testing shall be as shown below or approved equal; c) Validation of the source concentration by sampling exhaust and odor panel testing TVOC Monitor Equipment: RAE ppbrae plus (or approved equal0 Sensor type: Photo-ionization sensor with super bright 10.6 ev Detectable range: ppm Resolution: 1 ppb Calibration gas: Isobutylene Accuracy: ± 20 ppb or ± 10% of reading