various correspondence re police bldg

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..� Orono Police Department ' Plumbing Plan No. PLB 1406-00246 Page 2 July 9, 2014 4. T'he flammable waste interceptor installation shall comply with Minnesota Rules,part 4715.1120,#he 3-inch metallic vent must rise within 45 degrees of the vertical to a point at least 6 inches above the floar before offsetting horizonta}ly. 5. Vent pipes shall be at least 2 inches in diameter through the roof and must terminate not less than 12 inches above the roof(see Minnesota Rules,part 4715.2530, subpart 1 and subpart 2). 6. T'he bottom of the water service pipe located within ten feet of the sewer crossing must be at least 12 inches above the top of the sewer. When this is not feasible,the sewer pipe must be constructed of materials listed in Minnesota Rules,part 4715.1710, subpart 2,E. The water service should not contain any joints or connections within 10 feet of the crossing. 7. The submitted plans indicate the installation of a stormwater infiltration system. Please note that groundwater contamination and hydraulic failure are possible concerns with this type of installation. Verify that the administrative authority has approved the design for the storm water infiltration system. Please contact the storm water program staff at the Minnesota Pollution Control Agency(MPCA)for information concerning construction and permit requirements. 8. In no case shall water from roofs be allowed to flow upon the public sidewalk(see Minnesota Rules, part 4715.2700). Verify that the discharge from all rainwater leaders will meet this requirement. 9. All portions of the storm sewer system located within 10 feet of the building or water service line must be tested in accordance with Minnesota Rules,part 4715.2820. 10. Showers and combination showers-baths shall be equipped with individual thermostatic,pressure balancing, or combination thermostatic and pressure-balancing control valves in accardance with ASSE 1016(see Minnesota Rules, part 4715.1380, subpart 5). The maacimum temperature setting must be set or adjusted in accordance with the standard and should not exceed 110 degrees F. 11. The plans indicate that a faucet with a hand-held sprayer will be provided. If it is possible to submerge the sprayer and contaminate the potable water system,then an approved backflow preventer shall be provided on the water supply to the sprayer(see Minnesota Rules,part 4715.2100). 12. Faucets with hose thread outlets must be provided with approved backflow preventers(see Minnesota Rules, part 4715.2110,DD). Field-installed vacuum breakers must meet ASSE 1052. 13. Water closets in public bathrooms must have open-front seats(see Minnesota Rules,part 4715.1420). 14. Equipment used for heating water or storing hot water shall be protected by approved safety devices in accordance with Minnesota Rules, part 4715.2210 and part 4715.2230. 15. Domestic-type dishwashers may discharge to a sink tailpiece or food waste grinder if the discharge drain line is fastened as high as possible under the countertop(see Minnesota Rules,part 4715.1250). 16. Water supply connections to fixtures or equipment which have inlets below t11e spiil line must be provided with an air gap or approved backflow preventer(see Minnesota Rules, part 4715.2000). This shall apply to the dishwasher,coffee maker,and ice maker.