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r ■rY* ' <br />p\ *1 ! tL/%. <br />TO:Jeanne A. Mabusth, Zoning Administrator <br />FROM:Michael P. Gaffron, Septic System Inspector <br />DATE: <br />SUBJECT: <br />June 1, 1981 <br />#616 Parkview Center, Inc., 2280 Wayzata Blvd. <br />Conditional Use Permit - Septic System Use Review <br />This is in reference to your memo of May 26, 1981. The <br />proposed treatment center would have essentially the same <br />impact as a 10-home residential subdivision in terms of <br />total water use/waste treatment reauirements. <br />Treatment Center <br />Assuming: <br />Maximum of 42 residents <br />1 staff person per 3 residents for 2 8 hour shifts/day <br />1 staff person per 10 residents for 1 8 hour shift/day <br />% visitor per day per resident <br />Minnesota PCA water use data - Nursing Home: <br />Average 93 GPD per resident <br />10 GPD per employee <br />(Assume) 5 GPD Per visitor <br />Then: <br />42 residents x 93 GPD <br />V3 X 42 residents x 2 shifts <br />1/10 X 42 residents x 1 shift <br />»S X 42 X 5 GPD <br />Projected Water Use Treatment Center <br />X <br />X <br />10 <br />10 <br />GPD <br />GPD <br />3906 GPD <br />280 GPD <br />42 GPD <br />105 GPD <br />4333 GPD <br />Ten Residences <br />Assuming: 150 GPD/Bedroom (Standard Design Criteria) <br />5-3 Bedroom Homes, 5-4 Bedroom Homes <br />[(5x3) + (5x4)) X 150 GPD » 5250 GPD residential projected <br />water use <br />The treatment center, while having a somewhat lower projected <br />water use, would be concentrating all of the waste treatment <br />in a relatively small area as opposed to 10 separate smaller <br />waste treatment systems scattered over 20 - plus acres. The <br />best soils on the parcel for waste treatment do occur near <br />the proposed treatment center buildings, which might allow <br />for a standard drainfield system rather than the sewage treat­ <br />ment mounds which would likely be required for individual homes <br />due to slowly permeable soils and high water tables on the site. <br />With proper soil testing and system design, neither proposal <br />(treatment center vs 10 homes) would pose a significant pol** <br />lution hazard over the other, in my opinion.