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{ i Approved Area & System Type Soil test pits and other site features were evaluated during the site visit on March 13, 2007. The conditions observed during this site evaluation indicate that the area around the evaluated test holes is not capable of supporting a Standard septic system due to the following limitation: Not enough effective soil depth DEQ Rule requirement: 30"+soil required(depending on slope)and a minimum of 6"from bottom of the drainfield trench to layer that limits effective soil depth. OAR 340-071-0220(1)(a) Description: "Effective soil depth"is defined as"...the depth of soil material above a layer that impedes movement of water, air, and growth of plant roots. Layers that differ from overlying soil material enough to limit effective soil depth are hardpans,claypans,fragipans,compacted soil,bedrock,saprolite, and clayey soil." Soils provide an important part of the treatment and"sanitizing"process for sewage. However, this treatment by the soils requires air to penetrate. The problems caused by not enough effective soil depth: poor treatment of the sewage,and sewage being forced to the ground surface where it is a public health hazard. Under the conditions observed at the above address,an ALTERNATIVE SYSTEM is required by DEQ rules for both the INITIAL and FUTURE REPAIR systems.I Please refer to the signed approved site plan dated March 13, 2007. Alternative systems include SAND FILTERS, RECIRCULATING GRAVEL FILTERS, and ALTERNATIVE TREATMENT TECHNOLOGIES. Alternative systems are installed where soil, drainage,water table levels,or space limitations do not allow for a standard system installation.The unit pre-treats the septic tank effluent before it is discharged into the ground. Specific Requirements AN EFFLUENT LIFT PUMP WILL BE REQUIRED to install the septic system disposal field in the approved area and at the required depth.Detailed instructions for dosing tank/effluent pump installations are available in our office. The electrical wiring to the pump and alarm must be installed in accordance with the appropriate Electrical Code.The electrical work must be done under a Marion County Electrical Permit and must be inspected and approved by a Marion County Electrical Inspector.The work must be left uncovered and accessible for inspection. The electrical inspection includes the connections to the pump and alarm in the dosing tank, the wiring in the trench and the connections in the structure. A DETAILED SEPTIC SYSTEM STAKEOUT IS REQUIRED prior to the issuance of a septic system installation permit. The area for the system is very limited and the stakeout must be completed to determine that the system will fit within the area of the approved test pits. A scale drawn, detailed site plan must b submitted with the application for the installation permit.The stakeout must be inspected on the property and approved before the permit can be issued.Instructions for the stakeout are attached and are available in our office. Additional Conditions of Site Approval 1. This site is approved for the type of disposal system described above. Peak sewage flow into the system is limited to a maximum of 450 gallons per day, with an average sewage flow of not more than 225 gallons per day. This is normally sufficient to serve a single family dwelling with a maximum of four bedrooms. Premature failure of the treatment system may occur if either of these flow quantities is exceeded. Iffor some reason you expect your domestic household water use may exceed these flows, it may be advisable to increase the size of the treatment system. 555 Court St.NE — P.O.Box 14500--Salem,Oregon 97309-5036—Phone(503)588-5147—Fax(503)588-7948 Page 2 of 3