We do have several years of data showing that benzoic acid is a degradation product of the XAD-2 when exposed to stack gases. Please refer to the answer to Question #11 for my explanation of the weaknesses of XAD-2 and how to minimize background contamination of XAD-2 in your sampling program.
Thank you for making it possible in a timely manner, it was much appreciated. We look forward to continued business with you in the future. Continue the great work at your establishment.
- Elisheba Bajnath (Analytical Testing Services), Marabella, Trinidad