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107 APPLICATION ITEMS: Install blower piping (Exhibits) and underground odor control bed to treat 108 sewer gas. Plant surface odor control bed as flower garden (Exhibit). See also accompanying memorandum 109 from SYMBIONT. If the new system is not effective then the grass will be restored. 110 1 LEEPER PARK STANDARDS AND CRITERIA: 9.2 Spatial Organization 2.... All views, vistas, 112 landscape spaces located north and east and west of a line designated as the northern fence of the tennis 113 courts located in the western section of Leeper Park shall also be preserved. 9.4 Vegetation (includes Trees, 114 Shrubs, Ground Covers, Hedges, Allees, Fields, Forests, Planting Beds, etc.) 3. Alteration of existing or 115 addition of new vegetation materials and features will be considered if they do not alter the basic concept of 116 the historic landscape design. 117 118 RECOMMENDATION: Staff recommends approval of this project. The proposed location of the 119 flower bed is in the same general area as the shrubs and flower bed in the 1938 documentation of Leeper 120 Park West. (Exhibit). None of the odor abatement system will be above ground in the Park and will be 121 underneath the flower bed planted with shallow rooted annuals. The more noticeable change will be on the 122 River Crossing Head works for the sewer which will have a 4'x5'x5' foot blower installation on top of it, 123 but some of the current piping will be eliminated from the head works. 124 Klusczinski: Is the petitioner present? 125 Littrell: I'm here with Pat Greek and Al Carnahan. 126 Klusczinski: Could you please state your name for the record? 127 Littrell: Carl Littrell, City Engineer. We're here to try to solve a problem that the city has 128 with odors in Leeper Park. We didn't choose that site at random as a place to solve odors, 129 the odors are there, and we're tying to take care of them. We have several large sewers 130 that come together there and create a lot of turbulence in the man hole where they meet 131 and then they're funneled into three pipes that cross the river at that point. All of that 132 turbulence puts odor into the air. We have a facility there now, you can see some of the 133 gizmos on top (referring to photographs) the concrete foundation behind the fence intended 134 to blow air through a canister of activated charcoal. It doesn't work very well and it's very "5 expensive to keep replacing the charcoal. We'd like to do something better and we think C6 that using a biological treatment to treat the air will work better and be less expensive to 137 operate, and be less intrusive to the park, visually, as well. An added amenity with some 138 plantings, seasonal color and variety. We chose the location of the flower bed in that it's 139 away from other plants we stand less chance of disturbing roots of large trees at that 140 position and we need to get away from the riverbank to avoid times like we have now where 141 the bed would be flooded. The treatment is to blow air from the head works facility and 142 through an 18 in diameter pipe underneath the street and then it would then be diffused 143 underneath the bed with a mulch on top. As the foul air rises and is blown through that 144 mulch then the biology takes place to clean the air. After a while, the acids and by 145 products of that treatment will use up, if you will, that mulch and it will have to be changed 146 out. Every three to five years depending on the appearance of the materials we would have 147 a landscaper come in and change that out. We'd inspect the pipes and do whatever repairs 148 might be called for and then replant. We spoke with the Parks Board and they're receptive 149 to this facility, of course dependent upon getting a Certificate of Appropriateness, and they 150 have agreed to negotiate with us a price for their maintenance of the plantings so that it's 151 done properly and it's done well. 152 Sassano: So the plants are just visual? 153 Littrell: The plants are just visual; they're not part of the treatment. 154 Klusczinski: Is this the first opportunity that you've had to try that solution 2 155 Littrell: This is the first time that we've had it in South Bend. Pat Carnahan, with 156 Symbiont, is our Consulting Engineer and he can tell you something about another facility 157 that's photographed here. 158 Carnahan: I could show an illustration here; this is commonly used at waste water ;—.9 treatment plants. The collection system below the pipes that lead to it is represented —�0 behind this retaining wall, but the same concept is there. R just doesn't show the flowers 3