1. Obtain ChemSee's H2S-002 Hydrogen Sulfide Dosimeter, also found in the H2S-KT1 Hydrogen Sulfide Detection Kit. It is recommended that the dosimeters be placed on a sheet of paper on the floor with THE SIDE WITH THE PRINTED BLACK CIRCLE DOWN. (The circle with the numbers should NOT be visible). In addition, the dosimeters should be located at least 3 ft away from any air conditioning outlet. The dosimeters sample the air and later show color based on the amount of hydrogen sulfide in the air.

NOTE: Tear the aluminum foil envelope that the card came in at one side and SAVE IT. If visible color was formed, place the dosimeter card back in the envelop, seal it with tape and send it to us for electronic reading. Alternatively, purchase the H2S-KT1 to perform your own electronic analysis.

2. It is recommended to conduct tests in several rooms in the house with a priority on rooms where young children or elderly people sleep and in rooms where dry walls were replaced in renovations within the last 15 years.

3. Mark on each dosimeter the time that the dosimeter was placed and where it was placed.

4. The best results will be obtained if the occupants of the house will be away from the house during the sampling period and the air conditioning system will be off. However, meaningful results are obtained even if the occupants stay in the house with the air conditioning system on.

5. Leave the dosimeters to collect hydrogen sulfide sample over a THREE DAYS PERIOD if the house was vacated and for FIVE DAYS IF THE HOUSE IS OCCUPIED.

6. Turn the cards over and match the color formed with the printed color on the card. By visually comparing the color formed, estimate the exposure dose. Divide the DOSE by the total sampling time that the dosimeter was in that location. If the result is greater than 0.01 ppm than excessive hydrogen sulfide is present in the air. We strongly recommend that if any visible color forms, you send the cards back to us for electronic reading since visual color comparison can be misleading.