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To: File, 2380 Abingdon Way From: Steve Weckman, On-Site Systems Ma.nager Date: July 22, 1992 Subject: Septic System Repair On July 21, 1992, Sullivan's Services, Inc. requested a permit for the repair of the septic system at this address. The site inspection revealed that the first trench was discharging to the surface while the remaining trenches appeared to be dry. The first drop box was uncovered and found to be in satisfactory condition. Using a transit, the top of the PVC pipe for the first trench was measured to be 7" higher than the ground elevation at the end of the trench 60' away. The depth to drainfield rock at the end of the trench is approximately 12" which indicates that the rock bed must slope downward at least 18° over the 60' length. In order to repair the septic system, septic effluent must be forced into the second trench when the first trench becomes filled rather than allowing it to surface. The repair was made by cutting off the drainfield 30' from the drop box where the soil surface is approximately 9" higher than the elevation of the drainfield pipe in the drop box. This repair will still allow full usage of the first 30' of this trench while assuring that the ef f luent wi 11 f low into the second drop box once the f irst drainfield line is filled. The site inspection for this repair revealed that the cause of the septic system failure is due to the improper installation of the system. During the installation of the septic system, the contractor uses some leveling device to assure that the trenches will remain level. In this case the trench slopes downward to such a great degree that the contractor, Quickway Excavation, must have known the trench was not level but continued adding trench in order to achieve the correct amount of square footage required for the residence. lsv