07/31/2002 Env Bd Packet - Laserfiche WebLink

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• Memo To. Mike Grochala From: Marty Asleson CC: John Powell Date: July 11, 2001 Re: 0 & M Plan /Spirit Hills /Additional Comments This is in reference to the Rice Creek Watersheds request for the City of Lino Lakes Approval on the submitted O &M plan for the ponds and infiltration areas for Spirit Hills. I think the plan is good. I would like to see a more definable standard for "compaction" on page 2. In the fine sand soils I would like it to say the soil compaction should not exceed 80% Standard Proctor, or 1.28 gm /cubic centimeter in areas where structural support standards do not have to be used, and as low as possible in adjacent areas to structural compaction areas. I have discussed this with William McCully and he prefers to use existing conditions for soil density measurements. In that case, and assuming there is not a preexisting compaction problem, a measurement should be taken to reflect the preexisting condition (preferably the measurement would be in terms of bulk density). On page 2, the "Landscaping Infiltration Areas" section, should be rewritten to say "seeding schedules will be established by the City of Lino Lakes, and be planted by a qualified landscape contractor as approved by the City. A 3 -5 year maintenance contract with such a company is required ".