I wish all U-tubes did not have 4 as the top / bottom number. People seem to think that because "it" is below 4 the radon is below 4. I like your idea Tony.Tim MusserT. A. Musser Radon Remediation Co., Inc.Allentown, PA On May 15, 2011, at 11:54 AM, Tony McDonald wrote:I think U-tubes would be much easier to read if they looked like this: Tony McDonaldDirector of Commercial AccountsA-Z Radon Services11377 Miller Ave NEHartville, OH 44632330.877.5515 Office330.877.8912 Fax********** RN PROF (Subscription changes - archives) - http://list.uiowa.edu/scripts/wa.exe?SUBED1=RADONPROFESSIONALS&A=1 ********************* RN PROF (Subscription changes - archives) - http://list.uiowa.edu/scripts/wa.exe?SUBED1=RADONPROFESSIONALS&A=1 ***********