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CCDD Rules and Regulations Training Seminar PID/FID Equipment - Use and Calibration.

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Presentation on theme: "CCDD Rules and Regulations Training Seminar PID/FID Equipment - Use and Calibration."— Presentation transcript:

1 CCDD Rules and Regulations Training Seminar PID/FID Equipment - Use and Calibration

2 Equipment Pat Maloney J & M Instruments Field Use at CCDD Facilities Matt Vondra Bluff City Materials PID/FID Equipment Use and Calibration

3 AGENDA Presentation on PID and FID Technology Demonstration of TVA (FID-PID) Demonstration of RAE PIDs Questions And Answers PID/FID Equipment

4 PID/FID Equipment Use and Calibration Section Load Checking The owner or operator must institute and conduct a load checking program designed to detect attempts to dispose of waste at the facility. At a minimum, the load checking program must consist of the following components: a) Routine Inspections 1) An inspector designated by the facility must inspect every load before its acceptance at the facility utilizing an elevated structure, a designated ground level inspection area, or another acceptable method as specified in the Agency permit. In addition to a visual inspection, the inspector must use an instrument with a photo ionization detector utilizing a lamp of 10.6eV or greater or an instrument with a flame ionization detector, or other monitoring devices approved by the Agency, to inspect each load. All instruments shall be interpreted based on the manufacturers margin of error. Any reading in excess of background levels using any of these instruments must result in the rejection of the inspected load. In addition, any reading in excess of background levels on any monitoring device used by the Agency during an Agency inspection must result in the rejection of the inspected load.

5 PID/FID Equipment Introduction to FID and PID gas monitor equipment and practical considerations for field use Pat Maloney J & M Instrument Co. (219) x104

6 PID/FID Equipment MSA Permanent & Portable Gas Monitors for Toxics & Combustible Gases Refrigerant Monitors, Confined Space Meters & Self-Contained Breathing Apparatus (SCBA) SERVOMEX Gas Analyzers for Process Control, Combustion, & Environmental Features Paramagnetic 02 – Insitu Combustion CO &/or O2 & Photometric IR/UV THERMO (including the former Foxboro TVA) Industrial Mass Spec for Fast On Line Analysis of Process, Safety and Environmental Applications On Line Sulfur for Gas & Refining

7 . YOKOGAWA Process Analyzers for Combustion O2, Gas Chromatography, NDIR and Gas Density RAE Portable Gas Monitors for Toxic and Explosive Gasses - Specialists in PID Technology, Including Benzene & Butadiene Specific Portables PID/FID Equipment

8 Basic Theory: Sample is introduced into an ionization chamber and exposed to an ultraviolet lamp of a specific energy. The photons of UV energy excites the sample and ions (less than or equal IP to lamp) are attracted to a collecting electrode. The collection of the ions result in an increase current which is proportional to the concentration of the compound (compared to a known calibration standard). The sample exits the system unaltered. Photo Ionization Detection (PID) PID/FID Equipment

9 Diagram of PID PID/FID Equipment

10 Basic Theory : Sample is introduced into an ionization chamber and burned in a hydrogen flame. This process separates free ions (from hydrogen and carbon bonded – hydrocarbons) which in turn are attracted to a collecting electrode. The collection of the ions result in an increase current which is proportional to the concentration of the compound (compared to a known calibration standard). The by-products of the process are H2O and CO2. Flame Ionization Detection (FID) PID/FID Equipment

11 . Diagram of FID PID/FID Equipment

12 Advantages FID Wide dynamic and linear range (0-50,000 ppm or 5% which is 100% LEL as Methane) Highly sensitive to hydrocarbon vapors Can See Methane Very stable and repeatable (with generally tighter correction factors vs PID) Unaffected by ambient levels of water vapor PID/FID Equipment

13 Requires H2 Fuel Source Requires 16 % 02 for reading (so has Flameout Issues) Size and Weight Sees Methane (not really toxic – can interfere with seeing gas of interest) More Complex Unit (Calibration & Operation - Cost and Maintenance) Can NOT See Inorganics Disadvantages FID PID/FID Equipment

14 Size and Weight (Newer Models) and Simplicity of Use No support gases required (works in inert conditions – no O2) Better low end sensitivity (PPB – newer models) Non-destructive detector (allows sample collection) Can measure many inorganic compounds (NH3 for exam) Sensitive to aromatic, chlorinated & unsaturated hydrocarbons Immune to (does not see) Methane Easier and Less Costly to Maintain (newer models – have less expensive and more accessible lamps and detectors) Advantages PID PID/FID Equipment

15 Typically sufficient range – but lower range than FID (0-2000/10,000 ppm and looses linearity at higher ranges) Limited to reading gasses at/below Ionization Potential of the UV lamp installed (typically 10.6 – though 11.7 and 9.8 exist) Affected by Moisture: 95% RH may reduce reading 25-30% (New models do allow for dryer tubes– 15/30 minute run time) Based on my field experience, beware the claim for moisture immunity/compensation of some PID manufacturers. Disadvantages PID PID/FID Equipment

16 IP and Lamps IEPA requires 10.6 minimum (best lamp) 9.8 reduced survey capability 11.7 expanded range Quickly degrades – less stable short life PID/FID Equipment

17 CENTURY ® TVA1000B PID/FID Equipment

18 Internal Packaging PID/FID Equipment

19 Diagram of Dual System PID/FID Equipment

20 CCDD Rules and Regulations PID/FID Field Use and Calibration Concerns Under CCDD Rules and Regulations

21 PID/FID Field Use Filed Use of FID and PID gas monitor equipment at CCDD Facilities Concerns Under CCDD Rules and Regulations Matt Vondra Bluff City Materials

22 PID/FID PID - Photoionization Detector FID - Flame Ionization Detector Both are sensitive air monitoring devices Air stream pumped through detector so gases can be analyzed Unit ionizes hydrocarbon compounds carried in the sample air stream Ionized compounds are converted by unit into an approximate concentration when compared to a known standard Does not distinguish one type of compound from another PID/FID Field Use

23 PID/FID Operation Calibration Calibrate to zero using hydrocarbon free air Calibrate using 100ppm isobutylene gas Screen CCDD materials by sampling vapors emanating off the material Hydrocarbons found in the material will volatilize and be detected through the sample air stream Detector will give approximate concentration in parts per million (ppm) PID/FID Field Use

24 Place the tip of the PID near the edge of the material collected with the sampling device Record the peak measurement shown on the PID If the PID shows a reading greater than the margin of error, the material could be contaminated and that load should be rejected Results must be documented

25 PID/FID Field Use




29 Important Considerations Thoroughly review and understand manual Unit response time is usually within a few seconds Manufacturer provides a statement of the sensitivity/accuracy of the device Routine maintenance is needed and should be documented Charging Inlet filter change out Lamp change out PID/FID Field Use

30 Important Considerations Environmental Factors which may affect reading accuracy Temperature and humidity extremes Rain and sunlight Moisture and solids introduced into detector through air sampling pump Can purchase an outside filter to minimize the environmental factors that could affect accuracy of readings PID/FID Field Use

31 PID/FID Alternatives IEPA allows for the approval of alternate devices Field GC/MS – gas chromatograph/mass spectrometer X-ray fluorescence (XRF) analyzer - screens for the presence of metals estimated $35,000 per XRF analyzer PID/FID Field Use

32 Calibrating PID/FID for Background Levels PID/FID devices should be calibrated daily using the manufacturers suggested gas May calibrate several times throughout the day to account for any fluctuations in readings due to weather conditions Calibration should occur at the CCDD inspection site The device has a margin of error of +/- 0.1 ppm PID/FID Field Use

33 Calibration Steps Each morning the inspector should: 1. Calibrate the device 2. Establish background levels 3. Apply the margin of error to determine the rejection threshold and record this number 4. Utilize this number when determining which loads are accepted/rejected * See Sample Calibration Log PID/FID Field Use

34 PID/FID Calibration Log PID/FID Field Use

35 Issues Worth Additional Discussion Sample preparation How to deal with Back Ground measurements PID Calibration Demonstration PID/FID Equipment

36 Sample Conditioning Considerations Sample Conditioning – Concepts for improved results – not required procedures (to my knowledge) You want a warm representative sample(s) to test – to get better results Cold Weather – seal off sample and raise temperature if possible (less of an issue in warm weather – but could be standardized as a procedure. Get a sample from the center – not just a pass at the top As easy as a Zip lock bag by floor board heater 5 min – or similar SAFE temperature increase – leave sufficient head space to test. PID/FID Equipment

37 How to deal with background I have long proposed to industrial users (LDAR) to always use a real baseline ZERO – and to include the background as part of their readings. They may have more room for inclusion than will work for CCDD applications. However, I remain a big fan of starting from a baseline ZERO and if needed – log the background and report that against the reading. PID/FID Equipment

38 Zeroing out the background If you ever need to explain your numbers – people will understand a logged offset that was recorded against the reading. (The instrument reported ZERO on the Zero gas – we noted 3 to 4 ppm background and the unit reported 12 ppm sample headspace (9 ppm actual difference after accounting for lowest average background). Now imagine explaining that same 9 ppm after site personnel ZEROs to the back ground (unrecorded). Baseline ZERO is simpler to maintain and explain PID/FID Equipment

39 PID Cal Demo Use of Demand Flow Reg (bags used FIDs) USE ZERO GAS (not background) Span to Isobutylene 100 ppm Marker Cap field check – not marker PID/FID Equipment

40 MiniRAE 2000: PID Sensor Inspect sensor for damage and replace to rectify the following conditions: Bent electrode fingers Teflon mask warped so that sensing electrode shows Electrodes not in the same plane If problems persist, replace PID sensor Bent Electrode Teflon Mask Warped Straight Electrodes with mask removed for clarity PID/FID Equipment

41 Maintenance Clean PID Lamp & Sensor When display creeps upwards after good zero When PID responds to moisture When movement of PID results in response on display No dirt build-up to foster a decrease in airspace resistance Clean Sensor Bias Electrode Sensing Electrode Dirty Sensor Bias Electrode Sensing Electrode Dirt build-up absorbs water and breaks down airspace resistance leading to sensor leakage or moisture response PID/FID Equipment

42 Maintenance Humidity Check Cup hand over inlet or breathe into inlet for seconds Do not block flow If M2K reads >2 ppm or ppbRAE reads >500 ppb, then the sensor needs cleaning PID/FID Equipment

43 Maintenance How to Clean PID Sensor Always clean sample probe and replace or clean filters FIRST! If PID holds a stable zero after this step then further cleaning may not be necessary Use anhydrous methanol (Lamp cleaning solution), never use water Clean lamp face with lens tissue – do not touch with your bare hands PID/FID Equipment

44 Maintaining PID Sensor Cleaning the PID Sensor Clean sensor by immersion in cleaning solution Do not loosen or remove screws on PID sensor Remove the o-ring from the PID sensor If Ultrasonic Cleaner is not available Immerse in cleaning solution and agitate by hand Drying the PID Sensor Let air dry overnight Warm air (not hot) will speed drying PID/FID Equipment

45 Humidity Filtering II Tubes Temporary relief for a dirty sensor Dries sample gas for about ½ hour Measure VOCs; multiple sample use OK Useful for gasoline and chlorinated solvents CAUTION: May cause low response for some compounds or at low temperature or concentration Humidity Filtering II Tube (10-pack, p/n ) Tube Tip Breaker Tube Adapter (p/n ) Flex-I-Probe (p/n ) PID/FID Equipment

46 General Calibration Procedure Prior to daily use, it is good practice to perform a Fresh Air/Zero Calibration After Calibration, test for moisture response If readings increase more than 5ppm, clean lamp & sensor If readings do not increase higher than 5ppm, continue with pump stall test If unit passes, test pump to verify it will stall, if pump does not stall, service the pump Check Stall Threshold Check tubing Clean/rebuild pump or replace PID/FID Equipment

47 MiniRAE 2000 Top Assembly Filter history Green dust filter was originally used, but proved not to work effectively C filter was used next but proved to absorb too many VOCs Now only porous metal filter is used Lamp Housing 1 1/8 ORing PID Sensor Porous Metal Filter 3/8 ORing Sensor Adapter Lamp Housing Cap Housing PID/FID Equipment

48 Inside the MiniRAE 2000 PID/FID Equipment

49 Questions?.

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