| ENGINEERING DESIGN MANUAL -- TREATMENT AND DISPERSAL PACKAGES: RESIDENTIAL & COMMERCIAL |
SECTION III
GENERAL DRIP DESIGN CRITERIA
& SYSTEM STANDARDS
| I. | PRETREATMENT OF EFFLUENT | |
| 1. Domestic | septic effluent or better | |
| 2. BOD | no clogging of downstream (components or soil) | |
| 3. Grease | no clogging of downstream (components or soil) | |
| 4. Solids | no clogging of downstream (components or soil) | |
| 5. Flow Rate | do not exceed capacity of downstream (components or soil) | |
| II. | MECHANICAL FILTRATION (downstream filters) | |
| 1. Solid size allowed | 4 :1 emitter orifice size to filtrate particle size | |
| 2. Automatic self flushing | return backflush to treatment tank with provision made to minimize disturbance of solids pretreatment process ,operate filters to manufacturers specification. | |
| III. | FIELD FLUSHING | |
| 1. Supply pipe velocity | maintain 2 feet per second scouring velocity in supply line. | |
| 2. Periodically forward flushing drip line | operation at 2 feet per second at distal to scour tubing handled in public safe manner. | |
| 3. Frequency | per manufacturer, biweekly to semi annual with regard to water quality. | |
| IV. | DRIPPER TUBING LOADING RATES | |
| 1. Grease | no clogging of soil | |
| 2. Solids | no clogging of emitters | |
| 3. Flow Rate | no clogging of soil | |
| 4. BOD | no clogging of soil | |
| 5. emitter flow variation | max 10% variation in flow between any two emitters in any separately dosed zone. | |
| 6. Draindown limits | loading rate not to exceed soil recommended rates including total daily dosing. | |
| V. | STAND OFF | |
| 1. Ground Surface septic | covered | |
| 2. Ground surface treated | uncovered | |
| 3. Water table septic | 12" | |
| 4. Water table treated | none | |
| 5. Restrictive layer | 12" or special design | |
| 6. Separation | tubing installed 12" O.C. minimum (no maximum) | |
| * Note all standoffs to meet applicable state code criteria for conventional drainfields. | ||
| VI. | INSTALLATION AND TESTING | |
| 1. Tubing | Trenched, plowed, or excavated or special procedure for ultra shallow. | |
| 2. Clean tubing | flushed clean of construction debris,w/clean water | |
| 3. Leaks | no non-emitter leaks tubing, fittings or supply piping | |
| 4. Flow rate | Normal dosing and flushing flow rates and flushing pressure at the ends of each zone supply and return manifold shall be measured and determined to be in accordance with design criteria. | |
| 5. Equipment | All mechanical components, pumps, pump cycling, filters, filterflushing, high water alarm, and other systems, must be demonstrated to be fully operable in accordance with their design. | |
| 6. Air Release | Air release shall be provided for each drip line for drainage of normally open emitters after each dose. | |
| VII. | OPERATION | |
| 1. Automatic dosing | automatic if no operator on site | |
| 2. Flow equalization required | timer enable float and time dosed | |
| 3. Alarms | high water and other as needed for specific site | |
| 4. Monitoring | a)periodic if active process failure causes system damage or high risk to health or environment. b)for repair only if passive and low risk to health & environment. |
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| 5. Optional remote monitoring | a)remote if nonresidential and no operator on site. b)remote if restrictive site & high risk of surfacing |
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| 6. Storage | ½ day to 1 day storage between enable & alarm | |
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AMERICAN MANUFACTURING COMPANY, INC. Last revised: Jan-9-2006 Comments to: info@americanonsite.com Copyright © American Manufacturing Company, Inc., 2000 HOME | ABOUT | ORDER INFO | PRODUCTS | DRIP SYSTEMS | CONTROLS | CONTACT | DATA CENTER | SITE MAP |