Projects with Portable Air Sensors

Transcription

1 Prjects with Prtable Air Sensrs Bard f Directrs Santa Barbara Cunty Air Pllutin Cntrl District Our Missin: T prtect the peple and the envirnment f Santa Barbara Cunty frm the effects f air pllutin. Aern Arlin Genet Directr / APCO Mary Byrd, Cmmunity Prgrams Supervisr With C-Presenters January 18, 2018

2 District s experience Overview Jennifer Hernandez-Mra: Cmparing 2 particle sensrs Riccard Magni: Sensrs in the classrm Dr. Plidri: Suth Cast Air Quality Management District s sensrs prgrams

3 District Apprach Gain experience with sensrs data Cnsult with experts Cmpare against federal reference methd equipment Identify ptimal uses Explre educatinal pprtunities

4 Cuyama Valley High Schl Study District crdinated study by Snma Technlgy AirBeam ($250) and Alphasense ($500) particle sensrs Cmpared against federal reference methd equipment Classrm presentatin AirBeam Alphasense

5 Results frm New Cuyama District Experience Sensrs can detect high PM episdes Useful as educatinal tl Mre experience needed

6 Lw-cst sensr ($230) Uses a fan t draw air past a laser, causing reflectins frm any particles in the air Measures fine particles (PM2.5), als PM1.0 and PM10 PurpleAir Sensrs Reprts data t public website alng with Air Quality Index rating

7 Evaluating data PurpleAir Sensrs Sensr at Gleta mnitring statin cmpared against federal reference methd equipment Fllwed trend, BUT sensr had much higher readings during Thmas Fire Readings clser during nn-fire cnditins Mre evaluatins nging Educatinal prjects

8 Early Takeaways Variable accuracy individually Many sensrs taken tgether can ffer higher accuracy Useful in detecting trends Need t prvide public with tls fr understanding levels that dn t match the fficial mnitring results Need t cntinue t get experience, cnsult with experts Educatinal tl

9 Cntact Infrmatin Mary Byrd, Cmmunity Prgrams Supervisr , Next: Jennifer Hernandez-Mra

10 A Quantitative Analysis f PM 2.5 Micrns in Santa Maria, CA Questin: What time during the day wuld the air quality be classified as the wrst? Hypthesis: The wrst time wuld be the evening time. Device utilized: Dyls DC 1700 Prcedure: Tested 4 times thrughut the day fr 30 minute trials. Duratin: 22 days Cnclusin: The earliest time prved t have the highest levels f particulates.

11 Cntinuing the Research... Purpse: T determine if the air in my neighbrhd met air quality standards thrughut the testing perid. Duratin: Frm the mnth f June t December. New mnitr: Purple Air mnitr Detects sizes f 0.3, 0.5, 1.0, 2.5, 5.0 and 10um suspended in the air. Uses PMS1003 laser particle cunters Recrds per minute and will give 1440 data pints per day Data is dwnladable n purpleair.cm Cnclusin is yet t be determined

12 PURPLE AIR AT PVHS!

13 PROS AND CONS PROS: REAL TIME DATA STUDENTS CAN SEE LOCAL DATA STUDENTS CAN LEARN MORE ABOUT INTERNATIONAL OR FAR AWAY AREAS STUDENTS GET MORE PRACTICE WITH NUMBERS CONS: TECHNICAL DIFFICULTIES RELIANCE ON SENSOR NOT GETTING DAMAGED NEEDS CONTINUAL POWER AND WIFI

14 SBCEO COACHING PROJECT THE NEXT PHASE IN PURPLE AIR EDUCATION! I am ging t educate 4 high schl teachers abut hw t use Purple Air sensrs in their classrms with their students. Schls represented in the study include Santa Ynez High Schl, Santa Maria High Schl, and Pineer Valley High Schl. Each participating teacher will get a Purple Air sensr t use fr the remainder f the schl year.

15 Santa Barbara Cunty APCD Bard f Directrs Meeting; January 18, 2018 Evaluatin f Lw-cst Sensrs fr Measuring Gaseus and Particle Air Pllutants: Results frm Three Years f Field and Labratry Testing Andrea Plidri, Ph.D. Atmspheric Measurements Manager Suth Cast Air Quality Management District Diamnd Bar, CA Cleaning the Air That We Breathe

16 Established in July 2014 Over $600,000 investment Main Gals & Objectives Prvide guidance & clarity Prmte successful evlutin and use f sensr technlgy Minimize cnfusin Sensr Selectin Criteria Cmmercially available Optical Electrchemical Metal xide Real- r near-real time Criteria pllutants & air txics

17 Field Testing Started in September, sensrs evaluated Prcess Sensr tested in triplicates Cllcatin with FRMs/FEMs Tw mnth deplyment < ~ $2,000: purchase > ~ $2,000: lease r brrw Lcatins: Rubidux statin (main) Inland site Fully instrumented

18 Labratry Testing Particle testing Particle generatin systems Particle mnitrs: mass cncentratin and size distributin T and RH cntrlled: T ( C); RH (5-95%) Gas testing Gas generatin / dilutin system Gas mnitrs: CO, NO X, O 3, SO 2, H 2 S, CH 4 /NMHC

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21 Results Mst PM sensrs shwed: Minimal dwn time Mderate intra-mdel variability Strng crrelatin (R 2 ) with EPA apprved instruments (e.g., FEM) Hwever Sensr calibratin is needed in mst cases Very small particles (e.g. < 0.5 μm) are nt detected Bias in algrithms used t cnvert particle cunts t particle mass

22 Results Mst gaseus sensrs shwed: Acceptable data recvery Wide intra-mdel variability range CO; NO; O 3 (when measured alne): gd crrelatin with FRMs O 3 + NO 2 : lw crrelatin with FRM (ptential O 3 /NO 2 interference) SO 2 ; H 2 S; VOC: difficult t measure with available sensrs

23 AQ-SPEC - What s Next? Sensr Certificatin Prgram? Which pllutant(s) / sensr type(s)? Are PM (e.g., particle cunters) and Ozne (e.g., electrchemical) sensrs gd candidates? Certified fr which use? Regulatry? Fenceline? Imprve netwrk design? Permitting? Other? Very expensive t implement crrectly Multiple field testing lcatins acrss the Natin Multiple labratry testing facilities Extended testing time.fr what? $$$

24 AQ-SPEC Current Activities Fenceline Mnitring: Waste Dispsal Facility Mnitr fugitive emissins frm a Waste Dispsal facility in Suthern Califrnia 9 sensr ndes deplyed at facility fenceline n June 2016 Wireless netwrk / remte server Real-time PM 1, PM 2.5 and PM 10 mnitring

25 AQ-SPEC Current Activities Fenceline Mnitring: Waste Dispsal Facility Dedicated website Real-time data lgging, display, and mapping Data analytics and/r text alerts Prject benefits Crrelate PM measurements w/ n-site activities Measure PM levels befre and after facility upgrades

26 AQ-SPEC Current Activities PM Sensr Netwrk Canyn Fire (092517) > 2,500 acres Nte: Values are reprted as AQI units

27 AQ-SPEC Current Activities U.S. EPA Science T Achieve Results (STAR) prject Engage, educate, and empwer Califrnia cmmunities n the use and applicatins f lw-cst air mnitring sensrs Prvide cmmunities with the knwledge necessary t select, use and maintain lw-cst sensrs and t crrectly interpret the cllected data Three year study: SCAQMD (PI) University f Califrnia Ls Angeles (UCLA; C-PI) Snma Technlgy Inc. (STI; C-PI) BAAQMD Other CAPCOA agencies Cmmunity Grups Leisure Wrld (Seal Beach, CA) Weather Undergrund University f Auckland (New Zealand) 6 selected CA cmmunities EJ areas 200+ subjects > 150 sensrs

28 AQ-SPEC Current Activities U.S. EPA Science T Achieve Results (STAR) prject Engage, educate, and empwer Califrnia cmmunities n the use and applicatins f lw-cst air mnitring sensrs Fur specific aims: 1. Develp educatinal material fr cmmunities 2. Evaluate / identify candidate sensrs fr deplyment 3. Deply selected sensrs in Califrnia cmmunities 4. Cmmunicate the lessns learned t the public On-ging activities: Wide Spread Sensr Deplyment acrss Califrnia Over 450 PM sensrs 100 Aerqual ndes (i.e., PM, O 3, NOx) Clud Based Platfrm Develpment Data ingestin and strage Data visualizatin and mapping Data disseminatin 6 selected CA cmmunities EJ areas 200+ subjects > 150 sensrs

29 Lw-cst Sensrs / High-cst Netwrks Single user (e.g. 1 sensr) Cst: $ Hardware Minimal maintenance Small sensr netwrk (e.g. 9 sensrs) Cst: $$ Hardware Maintenance & calibratin Sensr cnnectivity Data lgging and management Data validatin and analysis Visualizatin and reprting Large sensr netwrk (e.g. > 100 sensrs) Cst: $$$$ Hardware Maintenance & calibratin Sensr cnnectivity Data lgging and management Data validatin and analysis Visualizatin and reprting

30 Thanks! The AQ-SPEC Team Dr. Andrea Plidri Dr. Vasileis Papapstlu Brandn Feenstra Dr. Hang Zhang Berj Der Bghssian Dr. Olga Pikelnaya