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Large On-site Sewage System Regulations Chapter 246-272B WAC <br />The Department of Health prepared this e xtract from the Code Reviser's official copy. <br />Effective Date July I , 201 I Fo1matting Revised July 2012 <br />Table 4: Typical Design Flows for Nonresidential Facilities <br />Type of Facility Design Unit1 Design Flow (gpd) <br />Schools with showers and cafeteria2 per student 16 <br />Schools without showers and with cafeteria2 per person 12.6 <br />Schools without showers and without per person 10 <br />cafeter ia <br />Boarding schools:.i per person 75 <br />Temporary farm worker housing2 per person 50 <br />Hotels, motels, and B&Bs per room 130 <br />Restaurants:.i per seat 50 <br />Truck stops and Interstate restaurants2 per seat 180 <br />Offices, with showers per person, 25 <br />per 8-hr shift <br />Offices, without showers per person, 15 <br />per 8-hr shift <br />Nursing homes:.i per bed 200 <br />Elder care facilities, retirement homes2 per bed 100 <br />Laundromats:.i per machine 500 <br />C hurches, without kitchen per seat 3 <br />C hurches, with kitchen:.i per seat 5 <br />Day care centers per person 20 <br />Picnic areas per person 5 <br />Campgrounds, RV parks with flush toilets per camp site 50 <br />only, no laundry or wet sewer hookup <br />Campgrounds, RV parks with flush toi lets, per camp site j 75 CA-rt , <br />showers, laundry, no wet sewer hookup <br />Campgrounds, RV parks with flush toilets, per RV space 120 ~y <br />showers, and wet sewer hookup, with or <br />without laundry 2 <br />Trailer dump stations:.i per dump 40 <br />Resort cabin per person 40 <br />Bar, cocktail lounge2 per seat 20 <br />I Does not mc lude employees and staff, unless md1ca ted. <br />2Indicates potential for waste s tT ength to exceed that of residential str ength sewage, requiring Treatment <br />Level E o r higher. <br />DOH 337-066 Page 6 0 of 9 1