January 20, Mr. Marty Foutch Facilities Director Bixby Public Schools 109 N. Armstrong Bixby, OK 74008

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1 January 0, 0 Mr. Marty Foutch Facilities Director Bixby Public Schools 09 N. Armstrong Bixby, OK 0 RE: Bixby th, th, and 6 th Elementary Indoor Air Quality CO and % Liberty OHM File Number 0-09 Dear Mr. Foutch: On January, 0, Liberty OHM conducted an indoor air quality test (spore ) of the classrooms as well as measurements for temperature (Temp), relative humidity (RH), carbon dioxide (CO ), carbon monoxide (CO), and dew point (DP) over a 6-hour period at Bixby th, th, and 6 th Elementary. The classrooms tested for indoor air quality (spore ) were randomly selected from the st and nd floors. This testing is being conducted to ensure that indoor mold/fungi, carbon dioxide, and carbon monoxide levels are within normal inside environmental levels. See below for our findings: FINDINGS Table below shows the results of the air samples taken from the rooms during normal school hours. While the majority of the results are consistent with normal inside environmental levels, the results indicate that Room 9 has elevated levels of mold in the air beyond that of the outside levels on the day of testing. It is the opinion of Liberty OHM that the levels measured in classroom 9 do not warrant relocation of students and faculty to other classrooms at this time. Liberty OHM will conduct an inspection and re-test classroom 9, sampled on January th, to determine if concentrations are trending upwards, downwards or remaining fairly consistent. Recommendations may change pending receipt of those results. A Quest AQ00 pro Indoor Air Quality Meter (Serial # 0) was used to measure and log the temperature, humidity, carbon monoxide, and carbon dioxide levels. The monitor was placed in the centrally located commons area and took measurements from the air for 6 hours. Results are recorded at -minute intervals. Carbon dioxide is an odorless gas and is the primary byproduct of human respiration. Carbon dioxide was measured during this survey to determine the adequacy of outside air ventilation rate in its ability to control carbon dioxide levels to below,000 ppm. The rise of carbon dioxide levels over time also provides an indicator for the ability of other volatile compounds to elevate over time. The OSHA permissible exposure limit for carbon dioxide is Liberty Occupational Health Management, Inc. E. 9 th St. Tulsa, Oklahoma (fax)

2 Page,000 ppm. Significant rise in CO did not occur during the survey with an average level of 66 ppm, and a range of 9-66 ppm. Temperature and humidity are measured to gauge the comfort of the indoor air. ASHRAE s standard (6.-00) states that relative humidity should be maintained between 0% and 60%. The average relative humidity for the survey was.%. This is slightly below the ASHRAE level, which is possibly due to the colder outside air. The formula listed below was used to determine if adequate outside air is provided based upon the difference between the inside and outside concentrations of carbon dioxide and the number of occupants. The ASHRAE standard requires the facility provide cfm/person of outside fresh air (Ventilation Rate Procedure). Results show an estimated 9 cfm/person, indicating that adequate fresh outside air is being introduced into the building. CFM/Person=(0,00)/(CO eq-co outdoor) CFM/person = 0,00/(66-) = 9 estimated Liberty OHM will return in thirty days to select a school within the district at random to perform Quality Assurance Testing as established by the Bixby Public School District. If you have questions or need additional information, please let me know. Sincerely, Rob Thompson, CIH, CSP President - Liberty OHM

3 Page : Outside-Pre-IAQ : Rm. 0 : Rm : Rm : Rm : Rm

4 Page : Rm. 9,0 Nigrospora : Rm : Rm : Rm : Rm. 0 0 Curvularia 9 0 : Rm

5 Page : Rm. 0 : Outside-Post- IAQ