2003-10-03 TKOA - Laserfiche WebLink

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EMLER:Was that storm sewer or were you talking about sanitary sewer? SPRINGER:IÓm referring to Mr. TylerÓs comments. And he drew our attention to the TSA case and the discussion there about mitigation of runoff. And perhaps if we could recall, Mr. Tyler, just for the purposes of clarifying what he was referring to, that could help get an answer to the question. EMLER:Okay. The general method for disposal of storm water woul providing drywells. But in this case, normally, theyÓre going to use a shallow type design in private property, which is just basically a hole in the ground with a grade over it. SPRINGER:Given the Findings of Fact, Conclusions of Law and Decision and Order in the TSA case, is there any problem raised here, by that sort of treatment? EMLER:Well, the Department of Health is the agency that regulate goes into injection wells. And, in this case, if they use a shallow design, it falls under the guidelines for an injection well. In other words, I believe their rule is that if it is wider than it is deep, itÓs not considered an injection well and, therefore, they donÓt have to comply with injection well requirements. SPRINGER:Mr. Chair? Thank you, Ki. IÓm not sure that I have the expertise to evaluate the answer and, against the question that Mr. Tyler asked. But, instinctively, that raises a concern for me. And I would ask then the Director, does the Department of Health review and comment on this portion of an application? YUEN:I think they do. If I would make a general comment on this, this is not a, this is a situation that should be, if itÓs a problem, it should be dealt with systematically rather than on a particular application. What weÓre talking about here is when it rains water will go over the parking lot and pick up little bits of oil that are on the surface and then go into, if the disposal is done, as on all other properties on Alii Drive, which is why I say it should be done systematically. It will go into the drywell some place and then, which does not extend down to the water table. The idea, I think, its justification for the present system is that little particles of the oil get filtered out by the lava rock before reaching the groundwater and then the ocean. The only, as a practical matter what was done in TSA is that thereÓs now a catch filter, thereÓll be catch filters installed at the inlets to the drywell. And the County is doing an experimental project really to look at the catch filters and see how much junk and what kind of material actually gets caught in them, and prevent it from being washed into the lava. It doesnÓt tell us what happens whether or not, whether that material really had gone through the lava or not and not into the groundwater. But we will be able, after reviewing this, to find out what winds up in the catch filter. If we talk about putting this into the sewer system, let me remind everyone that the sewer system goes into a pipe that gets pumped to the CountyÓs wastewater treatment plant at 13