cems fenceline monitoring presentation gratson 2015
Post on 13-Apr-2017
118 Views
Preview:
TRANSCRIPT
Meeting US EPA Fenceline Monitoring
Requirements – Combined Passive
and Active Approaches
Colorado Environmental Management Society
Fall Conference - October 13, 2015
David Gratson, CEAC - Environmental Standards, Inc.
Patrick Lewis - Defiant Technologies
Michael Waltman - Field Data Solutions/Field Env. Instruments
2
Outline
Regulatory Background
Benzene Fenceline Monitoring
Requirements
Limitations of Passive
Approach -> Active (TOCAM™)
Real Time Data
Collection/Management – FDS
Timeline
3
Regulatory Background
May 2014 U.S. EPA proposed changes Refinery MACT 40 CFR Part 63, Subparts Y, CC,
and UUU
NSPS 40 CFR Part 60, Subparts J and Ja
Published in Federal Register June 30, 2014
Key provision of Subpart CC Local Ambient Passive Benzene Monitoring
On-site/Nearby meteorological tower
Revisions expected to be finalized Fall 2015
4
Methods 325A/Rule: VOCs from Fugitive and
Area Sources
2 week sampling period, dynamic operation. Locations: place diffusive passive samplers at 15° to
30 ° intervals along the perimeter of the refinery.
Considerations:
Configuration of facility
Fenceline security
Building downwash
Background sources
Weather…
Field QC
Gloves, tube temperature during transit,
Blanks, Duplicates
5
Methods 325A: VOCs from Fugitive and
Area Sources
Rate of sampling specific to compounds, sorbent,
depends upon diffusion constants/uptake factor.
14-day integrated sample, monitor time, temperature,
pressure
Develop Standardize practices, train samplers.
Monitoring is required; it does not have to be passive
diffusive tube (325a).
6
Methods 325B
Data reported in parts per billion by volume (ppbv) or
µg/m3 adjusted for meteorological data. 2.8 ppbv is
critical level.
Laboratory Blank (empty tube) criterion: <0.2 ppb or
≤3 times LOD whichever is greater
Field blanks must contain no greater than one-third of
the measured target analyte or compliance limit for
field samples
Results uploaded to EPA public website every
quarter.
7
Final Concentration Calculation
𝐶𝑚 = 106 ×
𝑀𝑚𝑒𝑎𝑠𝑢𝑟𝑒𝑑
𝑈×𝑇
M measured = Measured mass of benzene, µg – using daily GC
response factor.
U = Diffusion uptake rate, mL/min
T = Exposure time, minutes (what frequency?)
Cm = Concentration, µg/m3 (or ppmv)
U - must be adjusted for STP (298.2 Kelvin, 760 mmHg) using
meteorological data (daily average?).
Temperature and M measured most sensitive parameters
Temperature range can have ~10% impact on U
ΔC value of 9 ug/m3 = 2.8 ppbv is critical level
8
Passive Sample Collection/Logistics
Sampling period of 2 weeks Medium-sized refinery: 18-25 monitors x 26
weeks/year…
Field Blanks (2/event) and Upwind Receptors
3 co-located samples per event
4 sets (~100 total): In field
At lab for analysis
At lab for reconditioning
Backup
Cost:
~$80,000 first year (purchase tubes, shelters, cost of analysis and tube conditioning) 26 events, 20 locations.
~$68,000 annual, on-going
- 3+ year life of tubes
9
Data Management and Analysis
- Dashboard
Monitor for 12 months, calculate rolling average per
§63.658 (w T/P), remove background, verify/validate prior
to public reporting!
10
Rule and Method Issues
Dynamic Operation
Limited laboratories with capabilities
Merge metrology and lab data quickly
Verify/validate data
Data uploaded every 14 days to public
If exceed 9 ug/m3 – corrective action plan
Can create site-specific monitoring plan
11
Active Real-Time Monitoring: TOCAM™
Active monitoring provides
real-time assessment,
ability to troubleshoot/track
emissions.
~$30k
12
Active Real-Time Monitoring: TOCAM™
Chemical
Detection Range
Benzene (MW 78.1)
Vapor Pressure
@ 25 °C
100 mmHg
Instrument Specifications
PID Lamp 10.6 eV (two, one for alert)
GC Column 2.5 m or 4.8 m - ~10 minutes
Weight 30 oz (850 grams)
Dimensions 9 ¼” x 5 ½” x 3” (23.5x14x7.6 cm)
Power 9 – 12 VDC , AC wall adapter
Interface Standard RS-232 port
Benzene
Sensitivity (MDL)
~0.1 ppbv with trap adjustment (vs 2.8
ppbv critical concentration)
13
TOCAM™
Collect, inject, separate and detect cycle is fully
automated
No specialty gases required
Simple calibration process
Chromatograms display real-time on computer
14
Remote Real-time Data Collection- FDS
15
Remote Real-time Data Collection- FDS
Wireless
Connectivity
Solar Power/Battery
Mobility: ~75 lbs with
55Ah battery
Real-time alerts and
reports –
web/email/phone
(text/SMS)
16
Real-time Data Management
17
Timeline of 40 CFR Part 63
Subpart CC
2012
Collect
baseline
data
Begin
reporting
2014 2015 2016 2017 2018
Finalize
strategy
and
contracts
Develop data
management
strategy
Implement
Sampling
program
18
Strategic Assessment of the Benzene
Monitoring
Pilot studies combining Method 325A/B with
real-time monitoring Consider conducting under attorney/client
privilege
Acquire sample collection equipment
Develop SOPs, train samplers
Vet, contract and “train” laboratory
Optimize data reduction, validation, reporting
Compare field to laboratory
Establish background, sources
19
Contacts
Environmental Standards, Inc.
David Gratson, CEAC
Senior Chemist
dgratson@envstd.com
505-660-8521
Defiant Technologies
Patrick Lewis
President
505- 999-5880/ 505-307-3576
Field Data Solutions
Michael Waltman
Manager
800-393-4009/ 412-723-1224
top related