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HALSTAD CONTRA CTING <br />14180 NE 91ST STREET <br />ELK RIVER, MN 55330 <br />612-441-4085 <br /> <br />April 11, 1997 <br /> <br />Weicht & Associates <br />13330 Island View Drive <br />Elk River, MN 55330 <br /> <br />Re~ <br /> <br />11061 - 173rd Ave. NW <br />Elk River, MN <br /> <br />Soil on this lot, in area designated for drainfield, is lomny fine sand, mid medium and coarse sand <br />at approximately 3' and below. The perc rate averaged 1.5 MPI at 24" deep and no mottled soil <br />was encountered to at least 6' deep. Trenches should be kept at 18" to 24" to keep from getting <br />bottom of trench into the medium and coarse sand. <br /> <br />The system is designed is for 450 gallons of water usage per day or 30 employees. A pump tank <br />and pump will be required to lift effluent to drainfield. <br /> <br />Approximate quantifies needed: <br /> <br />40' - 4" schedule 40 pipe <br />I - 1,250 gallon septic tank <br />i - 1,000 gallon pump tank <br />70' - 2" PVC supply line <br />I - Effluent pump (20 GPM at 9' total head) <br />I - Sight and sound alarm <br />5 - Drop boxes <br />47 - Tons I IA" sewer rock <br />200' - 4" perforated pipe <br />50' - 4" 3034 PVC pipe <br />Geotextile fabric <br /> <br />Pump septic tank every I to 2 years. <br /> <br />Sincerely, <br /> <br />Duane Halstad <br />M?CA 764/1031 <br /> <br />OMH:jh <br /> <br /> <br />