. >> good afternoon joan girardo i wanted to comment on 5 l and wanted in particular to comment on the response by mr. pearl to miss ann moller caen's question on why the 2-tier wastewater rate was being delayed for 3 years. and he states because the change disproportionate ly impacts customers with low water use and they want to make it more gradual for those customers, i just wanted to state that i'm having a little difficulty with what the true cost of service is for treating a unit of residential wastewater and i know that in the corollo report they recommended a 9.93 cent uniform rate and before you is to delay that for 4 years but i wanted to point out that right now the current rates -- people that have families that are in tier 2, for the tier 2 units are paying $10 and $0.53 that's 6 percent higher than the recommended uniform rate going out 4 years so it seems that families households are larger and therefore using more water and are in tier 2, have been subsidizing tier 1 users for many many years and we used to have 3 tiers now down to 2 and going to 1, but i think you shou

joan girardo is that right? >> hi joan good afternoon. >> thank you for the venue i wanted to say when we talk about an average bill it's a useless tool to understand your residential customer classes because the predominant occupancy of single family resident i want to say that pennies per gallon is also kind of useless to understand in effect and i took my neighbors's household five people measured by 1 meter to parents and 3 teenage kids and i gave them 50 gallons a day per person the lowest consumption rate in the state of california which we have achieved in san francisco and in 2017 under these rates they will be paying $2,556 annually. now, commissioner ann moller caen asked a very good question -- why are we waiting 4 years to implement a uniform rate for wastewater? back in 2007 i started the fight the family tax campaign to try to get rid of tiered rates because we believed they were unfair to families and at that time we had 3 tiers for water and 3 tiers for wastewater and using a calculation of 1 pers