Soils/site evaluation for septic systems

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STANDARD REPORT FORMS �ECUIRED: ALL SOIL HORING LOGS, PERCOI.ATION TESTS, AND SYSTE.M DESZGV PROPOS.ILS ' MUST HE REPORTED ON STANDAAD REPORT FORMS (MOST SZTE EVALUATORS CURRENTLY USE THE STINDARD PERCOL 1TION TEST AND SOIL BORING LOGS1 . THE SITE PLAN MUST 9E ATTACHED, AND THE ENTZRE PACXAGE SUBMITTED FOR REVIEW AT ONE TIME. PIEC�'lEAL SUBMITTALS WI7.L DELIY PROC�SSI2IG. NOTE: IF A SITE EVALUATION WAS PERFORMED ON YOUR LOT DURZNG THE SUBDIVISION PROC�SS, THE RESULTS ARE _^ AVAILABLE FROM THE HUSLDING AND 20NING DEPART.`4ENT (473-7357) . YQU *liJST STZLL SUHMZT A SITE PLAN AND SYSTEM DESIG:1 PROPOSAL. SZTE PLAN REQUZRE.7ENTS: SIT� PLAN SHOULD BE TO SC1LE (PREFE.RABLY 1" � 20', 40' oL 50') AND MUST ZNCLUDE THE FOLLOWZNG: A. ALL PROPERTY LZNES AND LOT �I,SENSZONS. B. ALL EXISTZ:IG AND PROPOSED STRUCTORES. C. ALL EXISTZNG AND PROPOSED WELL LOCATIONS AND/OR WATER SUPPLY PIPING. D. REZ�}1TZVE ELEVATZONS OF HOIISE. LOT CORNERS, TANKS, AND DRAINFIELD SITES. E. SLOPE OF GROUND AT DRAINFIELD SITES (CONTOUR LINES OR SLOPE DIRECTZON ARROWS AND SLOPE $). ' F. LOCATION OF ALL PERCOLATION TEST HOLES AND SOIL BORINGS, WITH IDENTIFYING SYMBOLS AND RELATIVE GROUND ELEVATZONS OF EACH. ' G. PRIMARY AND ALTERNATE DRAZNFIELD AREAS ZDENTIFZED. H. OISTANCE FROM PRZ.'9ARY 11ND ALT�RNAT£ DRAINFZELD AREAS TO PROPERTY LZNES, WELLS, AND ANY MARSH, LAKE, STREAM, OR DRAINAGc CHANNEL WITHIN 75' OF r1NY PART OF THE SYSTEM. •rw�w+*»►iti+r�+r*,e*r�rwisi*�w+st,rw��*+r*�*►►i►*��+rsir�,rt�+*ti��++s�t��+�t+eir**::r+y��++:tt+ir*t**�tw*t*�• GENERAL SEPTZC SYSTEM REOUIRE.MENTS 1. THE TRENCH DRAZNFIELD SYSTEM IS STANDARD AND MUST BE USED WHENE�IER POSSIBLE. MOUND SYSTEMS MAY BE SUITABLE FOR NEW DEVELOPMENT AND FOR REPIraCE�SENT OF EXISTZNG FAZLZD7G SYSTEMS WFiERE SZTE CONDZTZONS LIMIT THE USE OF TRENCX SYSTEMS. HED OR WZDE TRENCH SYSTEMS ARE NOT ALLOWED E:CCEPT AS REPAZRS TO EYZSTI:IG SYSTEl�15 WHERE LOT SIZE SEVERELY LIMITS ALTERNATIVES. 2. SZTE EVALIJATION MUST ZDENTIFY 10,000 SQUARE FEET OF SOILS AND SLOPES SUITABLE FOR DRAIN- FIELD. THZS IS GENERALLY a LaRGE ENOUGH AREA FOR A PRI.'3ARY AND ALT£RNATE (FUTtJRE) SYSTEM.. 3. SLOPES: FOR STANDARD TRENCHES, GROUNDSLOP� MAY NOT EXCEED 18i. FOR SHALLOW TRENCHES, AND FOR STANDARD TRENCHES WHERE IMPERMEABLE SOIL LAYERS :lAY CAUSE SZDEFiZLL SEEPAGE, GROUNDSLOPE MAY NOT EXCEED 12�. FOR MOUND SYST£MS, SEE BELOW: y PERCOLATZON RAT� ALLOWABLE NAJCIMUM SLOPE 1/2 - 5 MPI 6R NOTE: TFiESE ARE COARSE SANDY SOILS; 3' MSN. DEPTH TO WATER TABLE. 5 - 30 MPI 128 MAXZJIUM . .30 - 60 MPI 6&• MAXI:lUM _ _ � 60 - 120 MPI 3i MAXZMUM OVER 120 MPI MOUNDS NOT ALLOWED + 4. SEASONAL WATER TAHLE (IDENTZFZED BY SOIL MOTTLING OR ACTUAL WATER, WHICSEVER IS SHALLOWER). � DEPTH TO SEASONAL W.T. 0' - 2'........................NO SYSTEM ALLOWED 2' - 4'........................MO[JND SYSTEM ALLOWED i i 4' - 5'........................MOUND OR SHALLOW TRENCHES ALLOWED 5' OR DEEPER...................STANDARD TRENCHES OR MO(JND P,LI.OFIED '�-` 5. PERCOLATION RATE - SYSTEM OPTIONS � i� p - �7 MpI,,.......NO SYSTEM ALLOWED; T00 POROZJS FOR TREATMENT �-•-'� � - 60 MPI........STANDARD TRENCHES ALLOWED 60 - 90 MPZ........MOUND SYSTEM; FILL TRENCHES MAY HE ALLOWED WHERE , WATER TABLE ZS NOT A FACTOR.. 90 - 120 MPI.......MOUND SYSTEM ONLY; OVER 120 MPI, NO SYSTEM ALLOWED. ' �" 6. SETBACXS A) SEPTIC TANKS FROM: • .:� HOUSE.........................10' MINIMUM; 20' PAEFERRED. '�i�(' FTELL.........................50' MINIMUHt 75' PREFERRED. , `}' LAKE, STREAM. PIETLAND........75' MZNIMUM ` H) DRAZNFIELD FROM: '�' HOUSE, DRIVEWAY, PATIO, POOL, TENNIS COUAT, ,' OTHER HARDCOVER DZSCHARGING TOWARD DRAINFZELD......20' MZNIMUM . WELL...............................................75' MINIMUM - LAKEr STREAM. WETLAND..............................75' MINIMUM -'i - .. 1 21 ._..__-.'�