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expected to rise in 1985 to an average of about $100 per 2000 gallon <br />load partly due to the approximately $10 per load dump charge levied <br />by the MWCC when the pump truck discharges the "septage" (septic tank <br />waste) to the MWCC sewer system. Two extreme residential examples <br />illustrate these costs: <br />1) 1-2 persons in residence, doing laundry off -site, using <br />water -saver toilets and conservation practices. E:-timated daily <br />usage: 30 gpd per person. <br />30 gpd/person x 1-2 persons x 365 days/yr T 2000 gallons/pumpout <br />= 6-11 pumpouts required/yx <br />6-11 x $100 = $600-$1100/yr <br />2) Family of 6 doing laundry at home, no water conserving <br />practices or devices estimated daily usage: 75 gpd per person <br />75 gpd/person x 6 persons x 365 days/yr = 2000 gallons/pumpout <br />= 82 pumpouts/yr (or every 4 days) <br />82 x $lC3 _ $8200/yr <br />With a range of $600-$8200 yearly estimated maintenance cost, <br />holding tanks are clearly not an economical method of permanent sewage <br />management. In addition, problems encountered with this type of <br />system can include failure to pump out when needed, leading to a sur- <br />face discharge or backup in house; illegal pumping methods (siphon <br />hose to a nearby wetland or other surface discharge); and <br />inconvenience (needing a pumpout on a holiday, for instance). Also, <br />unless properly protected with secure covers, holding tanks with a <br />manhole access at the ground surface for ease of pumpout are a poten- <br />tial hazard for inquisitive children who might fall in. <br />For the economic and technical reasons stated above, holding <br />tanks are not recommended as a permanent sewage treatment solution for <br />the Crystal Bay area. <br />OPTION 6. Selective condemnation and demolition of properties <br />which cannot or will not comply. <br />Of the 83 properties listed in the "system replacement capability <br />survey", 21 were found to be located on sites so limited that should <br />the systems fail, they could not be replaced in any way meeting the <br />minimum code requirements. These 21 have a total taxable market value <br />(from the Hennepin County tax records) of $772,600 for the structures <br />only. <br />It is unlikely that a total condemnation of these 21 properties <br />would be considered. Under selective condemnation, we would strive to <br />remove houses of low value which would a) eliminate an existing fail- <br />ing system that couldn't be repaired according to .:ode, and b) al low <br />th;: combination of the remaining land with adjacent properties to <br />increase their replacment capability. <br />14 <br />