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Paxton Meeting Notes." He inquired if this was covered under CALGreen and if any consideration has been given to this. Mrs. Rondash replied that staff considered what would be more appropriate in certain situations, the costs associated with moisture sensing, and irrigation sensors versus weather sensors, and it carne down to a project -by- project choice. She noted that some projects do well with soil sensors and some do not. She added that the City's landscape architect has stated that larger projects will benefit from a weather system while smaller or internal projects like a courtyard would do better with a soil- sensing system. She indicated that staff looked into this based on Mr. Paxson's concerns, but are not proposing any reduction in the choice; however, one or the other of the choices would be mandatory. Commissioner Pentin stated that the Downtown Vitality Committee Meeting Notes, dated September 7, 2010 expresses concern about the impacts of Proposition 23, if passed in November, potentially repealing the Code. He indicated that he has not studied Proposition 23 and inquired how this might impact the City. Ms. Stern replied that Proposition 23 has the potential to repeal AB 32, which is the global warming act. She added that this was the speculation of the speaker at that meeting but that staff does not know whether or not it would have any impact on CALGreen. Chair Olson stated that the staff report indicates that staff has evaluated and compared Pleasanton's existing green building requirements with CALGreen basic Tier 1 and Tier 2, but he does not see the results of that comparison. He indicated that he understands Exhibit D; the listing of all the electives, the Tier 1 residential required measures, the non - residential required measures, and the long list of required measures. He inquired how staff determined that Tier 1 is closest to the City's present requirements. He noted that one concern out there for developers trying to build a project is how much change is truly here versus what the City currently has on its books. He indicated that he feels this should be addressed before it goes to the City Council. Mr. Dolan explained that there are two different systems, and one is the point system. He stated that staff took the measures either required or elected and scored them in the point system to see how they would score and how close they would get to the required points necessary. He noted that following this exercise, staff determined that Tier 1 is needed to get to the points the City already requires. He indicated that the easiest way would be to adopt the basic requirements, but based on staff's evaluation, this would clearly be a step backwards and a significant relaxation of the City's current building ordinance. Commissioner Blank presented an example of what the cost requirements for a 3,000- square -foot residential single - family home would be, indicating that a developer EXCERPT: PLANNING COMMISSION MINUTES, September 29, 2010 Page 10 of 15