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(4) The design for water systems based <br />upon metered water use records shall have <br />an MDD no lower than three hundred fifty <br />gallons per day per equivalent residential <br />unit (ERU), except for the design of any <br />expansion to an existing water system that <br />has a minimum of two years of meter <br />records that clearly demonstrate that a <br />lower design value for MDD may be used <br />without significant risk of pressure loss. <br />The meter records must correlate the <br />demand data to the actual level of <br />occupancy for the periods covered by the <br />records. <br />(5) The minimum water demand and I <br />duration required for fire flow and/or fire <br />suppression storage shall be det~rmined by <br />the local fire control authority or chapter <br />246-293 WAC for systems within the <br />boundaries of a designated critical water <br />supply service area (CWSSA). Public water <br />systems that are not required to comply <br />with minimum fire flow standards shall <br />coordinate with the local fire control <br />authorities to ensure that any hydrants on <br />the system, if they can possibly be used in <br />the course of fire suppression activities, do <br />not create adverse pressure problems within <br />the water system as a result of fire control <br />actions. -- <br />Water Availability & OSS: Land Development and Building Permit Approval <br />Land Development Preliminary and Final Approval <br />Allows withdrawal of public ground waters <br />for stock watering purposes, or the watering <br />of a lawn or a noncommercial garden not <br />90.44 Regulation of public ground exceeding ~ acre in area or for single or <br />waters (exempt wells) group domestic uses in an amount not <br />exceeding 5000 gallons a day. Authority <br />granting Department of Ecology to require <br />water metering as well. <br />Plats, Subdivisions, L ocal h~fu d epartment or other agency I <br />58.17.150 Dedications must provide recommendations for <br />approval or disapproval as to the adequacy <br />28