TEAD_CEMS-Question_&_Answers.docx

Question: Section 3b xi & xii - Can the Sample panel and conditioning plate be bolted to the side or front of the 19" open rack enclosure still allowing access to the analyzers? Or are these to be separate assemblies? If they are to be to separate what is the distance between them during final installation?

Response: Current system is separate. Sampling plate is located 3 Feet from CEMS rack on a wall. Preferred is separate for ease of maintenance.

Question: Section 3d ii 2 e & 3d iii 2 d - Both request a 120 second response time. Is this the response time of the analyzer (gas is present at its inlet to result), or the entire system (gas present at the probe to result)?

Response: The entire system => Once the calibration gas bottle solenoid valve is opened through the cal gas line to the stack probe back down the sample line to the analyzer.

40 CFR Part60 Appendix B

*8.3 Response Time Test Procedure. The response time test applies to all types of CEMS, but will generally have significance only for extractive systems. *8.3.1 Introduce zero gas into the analyzer. When the system output has stabilized (no change greater than 1 percent of full scale for 30 sec), introduce an upscale calibration gas and wait for a stable value. Record the time (upscale response time) required to reach 95 percent of the final stable value. Next, reintroduce the zero gas and wait for a stable reading before recording the response time (downscale response time). Repeat the entire procedure three times and determine the mean upscale and downscale response times. The slower or longer of the two means is the system response time.

*4.5 Response Time. The response time for the CO or O2 monitor must not exceed 2 minutes.

Question: Section 1b i, 3a i, 3e i 2 - ACA testing. Which specification will be use 40 CFR 75 or 40 CFR 60? Most incinerators only required part 60, not 75. Specifically do we need to configure the system to use 2 calibration gas bottles or 3 calibration gas bottles?

Response: 40 CFR 60 Appendix B and Appendix to Subpart EEE of Part 63

For ACA we will one with 3 for each channel (HI, MID, LOW for Hi CO, Low CO and O2) and the other three CEMS with 2 for each channel and zero (HI, MID, ZERO for Hi CO, Low CO and O2)

If we need to make it the same for all four CEMS than use all 3.

Drift Test or Calibration Error only needs 1 calibrated gas bottles for each channel (Hi CO, Low CO, O2) and a zero gas. Acceptable to use other span gasses for zero if calibration gasses use nitrogen as the inert gas)

Question: Section 3e i - Does the system require a separate PLC? We provide several analyzers that have an integrated PLC/computer inside the analyzer. Can this be used, or do you require a separate PLC? We can configure the internal system to meet all the requirements listed in the solicitation, including the ethernet connection to the existing APE126 if this is acceptable.

Response: It is not required but if not, the supplier will need to document how this communication is done to and from the APE126 AB PLC. To be sure this is possible documented examples of an existing system would be preferred.

This is why we preferred a compact logic PLC for the CEMS. If the data is on the CEMS AB compact logic PLC it is easily transferred to the APE1236 PLC and HMI.

Question: Section 4b - Does the CEM system require regulators and gas lines for the calibration gases to be installed in advance in the initial construction or will these be added on latter by another organization?

Response: Regulators and sample gas lines will be provided later since each site will have different sample line lengths and gas bottle configurations.

Question: Section 3d i 4 - The data to be stored for 100 days. Is this the logged data from the gas analyzer (CO and O2 levels), the programmed parameters for controlling the system or something else?

Response: Logged data from the gas analyzer is required for the three channels. Calibration, Drift Test and ACA Tests dates and results, and analyzer alarms are not required but could be useful.

Question: Section 4a i - During the build and factory acceptance test would the APE1236 PLC be shipped to the awardee so "the transfer of and from the system controller to the APE1236 PLC" can be tested and verified?

Response: That would depend on our contracting and when we receive our APE1236 PLC, but to be safe I would not count on it.

This is why we preferred a compact logic PLC for the CEMS. If the data is on the CEMS AB compact logic PLC it is easily transferred to the APE1236 PLC and HMI.

Question: Under section (d) Supplier Qualifications, sub part (iii) - requires ISO 9001 certification.

Will you accept a quality plan in lieu of ISO 9001 certification?

Response: We could look at their QP and compare to ISO-9001 standards, but it would be up to the supplier to show how they meet the requirement.

Question: Will you accept the ISO 9001 certificate from sub suppliers?

Response: The supplier should still have some sort of QP, they will be the ones responsible for the system. It will need to meet ISO standards as stated above.

Another requirement in the specification was the supplier of the CEMS should be the manufacturer of the CEMS. This guarantees supportability and the ability for the supplier to provide technical support.