denied the motion but held that because Mobil agreed to theAgency~smotion that in effect it was an amended petition.
Treated effluent from the final clarifier is routed
tnrough a 4.9 million gallon guard basin where it is retainedfor approximately 51 hours and then aerated in the final aerationcone prior to release to the Des Plaines River.
Pet.
Table 2).
The average
operating cost for ammonia reduction projects during the lastfive years has been $1,660,000 per year, including amorti...
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