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6.G. - Page 147 of 238 <br />4 identifies the type of meter and associated metering equipment for the.County-line Meters and <br />Terminal Reservoirs. Table 5 identifies the meter calibration and maintenance frequency for the <br />meters and equipment listed in Table 4. <br />SECTION A. WATER METERS <br />1. General <br />The Agreement provides that certain operating and maintenance expenses and the capital <br />cost of certain categories of utility plant in service are to be allocated between San Francisco and <br />the Wholesale Customers on the basis of proportionate annual usage of the Regional Water <br />System. The purpose of this Attachment is to describe the meters and illustrate the method by <br />which proportionate annual usage will be calculated. <br />2. Units of Measurement, Rounding, Conversion <br />The SFPUC will compile the usage data required to complete Table 1 annually. The. <br />units of measurement and conventions for converting and rounding will be as follows. <br />The data in the Table 1 will be presented, and the calculations contemplated by this <br />Attachment shown, in units of millions of gallons per day (mgd), rounded to.the nearest tenth of <br />an mgd. Percentages (e.g., the City and Wholesale usage rates) shall be carried to two digits to <br />the right of the decimal point and reduction factors shall be carried to four digits to the right of <br />the decimal point. Data compiled by the SFPUC in units of hundreds of cubic feet per year (ccf) <br />shall be converted to mgd by multiplying hundreds of cubic. feet per year by 0.0000020493 (or <br />2.0493 x 10-6) for non -leap years and 0.0000020437 (or 2.0437 x 10-6) for leap years. <br />In rounding,. if the rightmost digit dropped is 0 through 4, the preceding digit shall be left <br />unchanged; if the rightmost digit dropped is 5 through 9, the preceding digit shall be increased <br />by 1 <br />7 <br />March 11, 2009 <br />M <br />