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... .. s�.� <br /> �PECIFICATIONS <br /> SEIJAGE DISPOSAL SYSTEM <br /> WAREHUUSE - 2630 RAIL4IAY-�AV�Ntf€, EVERETT <br /> � � . <br /> �� ;; <br /> 1 . Septic Tank: 90C Gallon <br /> 2. Drainfield Area: 300 Square Feet hiinimum <br /> 3. Drain Tile: <br /> a, $i e�C" Diameter <br /> b. Length: 100 Lineal feet <br /> c. Grade: 1/2" per 7J feet <br /> d. Space: 1/2" between tile lengths <br /> 4. Fill : None Required <br /> 5. Trenches : 36" Wide <br /> a. Bottom of trenches to be <br /> 1 , 24" to 36" below finisl�ed grade <br /> 2, At a grade to ensure compliance with note 3c <br /> b. Trenches to be separated by a minimum of 7.5' of undisturbed <br /> material <br /> 6. Filter Materia'. (Drain Gravelj <br /> a. Mater�a Size: 3/ minimum> 1-1/2" maximum <br /> b. Depth: 6" beneath drain tile, 2" above drain tile <br /> c. Protection from backfill : Place untreated building paper <br /> prior to backfillin9. <br /> 7. Tight-Line Grade <br /> a. From building to septic tank: 2.`; (1/4" per foot) <br /> b. From septic tank to Distribution Qox - 2ro Miniinum <br /> 3. Materials and Installation to meet requirements of City of Everett <br /> ,106 NO.C6E3-59 LEE JOHNSOY & ASS�CIATES, IiIC. <br /> August 2/, 1963 CONSULTIN6 Ef�Gi`IEERS <br /> Sheet 2 of 2 ll12 PACIFIC AUENUE � <br /> — — EVERETT, NASHINGTON <br /> i , <br /> ' <br /> � <br /> �-�: - <br />