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BMP 1 WATER SURVEY PROGRAMS FOR SINGLE-FAMILY RESIDENTIAL AND MULTI-FAMILY RESIDENTIAL CUSTOMERS Criteria to Determine BMP Implementation Status a) Agency has developed and implemented a strategy targeting and marketing water use surveys to single-family residential and multi-family residential customers by the end of the first reporting period following the date implementation was to commence. b) Agency has directly contacted not less than 20% of single-family residential accounts and 20% of multi-family residential units during period being reported. c) Agency is on schedule to complete surveys for 15% of single-family residential accounts and 15% of multi-family units within 10 years of the date implementation was to commence. Agencies will receive credit against the coverage requirement for previously completed residential water use surveys according to the following schedule:' % Credit Before 1990 0.0% 1990 12.5% 1991 25.0% 1992 37.5% 1993 50.0% 1994 62.5% 1995 75.0% 1996 87.5% 1997 100.0% d) Agencies will be considered on track if the percent of single-family accounts and the percent of multi-family accounts receiving water use surveys equals or exceeds the following: 1.5% by end of first reporting period following date implementation to commence: 3.6% by end of second reporting period: 6.3% by end of third reporting period; 9.6% by end of fourth reporting period: and 13.5% by end of fifth reporting period. · In its study "What is the Reliable Yield from Residential Home Water Survey Programs: The Experience of LADWP·' (AWWA Conf. Proceedings, 1995), A & N Technical Services, Inc., found that the average level of savings from home water surveys decreased over time. reaching about 50% of initial yield by the fourth year following the survey, on average. The above decay schedule used for crediting past surveys utilizes these findings to recognize and account for the limited persistence of water savings over time from home water use -3-