Morris Forman Wastewater Treatment Plant
Community Odor Survey Project

VERBAL DESCRIPTION

Week # 71

The community odor survey was conducted on the afternoon of Friday, August 4, 2000. It was a sunny day with light winds generally out of the north at 0-3 mph. The temperature was about 80°F.

For the five (5) ambient sampling locations (#1-#5) in the neighborhoods north and northeast of the treatment plant, along the Dumesnil St. corridor, the odor intensities were non-detectable to faint and the hydrogen sulfide (H2S) concentrations ranged from 4-9 parts per billion (ppb). No industrial odors were detected at any of these stations but a sewer odor Zimpro was detected at stations #2 and #3.

Non-detectible to very faint odors were detected at the three (3) sampling stations (#6-#8) in the neighborhoods east and southeast of the plant. H2S levels were not measured because the H2S analyzer battery was low. No MFWTP odors were detected but a very faint sour mesh odor was detected at station #8.

For the three (3) sampling stations (#9-#11) located south and southwest of the treatment plant in the more industrial areas of the City, the odor levels were faint to strong. The H2S concentration was not measured. Industrial chemical odors were detected at stations #9 and #10.

At the MFWTP the wind was generally out of the north at 1-5 mph. The odor intensity at the seven (7) sampling stations around the plant ranged from very faint to strong
H2S concentrations at these stations were not measured. Both biotowers were in-service and both scrubbers were running. All recirculation fans at the towers were operating. The air from all three sludge storage tanks is now being forced into the solids separator and then treated in the incinerator. Only the new incinerator was in service today.