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He indicated that in both commercial and residential structures, the larger the structure the greater the cost reduction and payback time. Chair Olson noted that the staff report did not reference a 3,500- to 4,500- square -foot increase. He stated that he took the expensive side of those ranges, added it up, divided it by 2,100 square feet, and he arrived at a cost per square foot increase of $3.17. He inquired how staff arrived at $1.67 to $2.14 per square -foot increase. Mr. Corbett replied that the figures were provided by CBIA to staff in mid - August. He noted that CBIA, along with the AIA and other organizations, has been involved in the development of the code from the start. He indicated that CBIA is a stakeholder in developing the code and that they represent the builders and are supportive of cities going to the Tier 1 measures. Mr. Corbett added that costs would rise dramatically as one chooses the high end of construction materials. He used as an example the range of costs for toilets, depending on the type. Commissioner O'Connor inquired if having two different water meters for domestic use and for exterior use is an option or a requirement. Mrs. Rondash replied that it is a requirement listed in the CALGreen Code. She added that staff would be amending it to indicate that separate water meters would be required for indoor water and for outdoor water to meet the Tier 1 standard. Ms. Stern clarified that this is an amendment staff is suggesting. Mr. Corbett noted that having separate meters is a non - residential requirement and not a residential requirement. He added that it is currently a common practice and mandated for non - residential projects with over 5,000 square feet of landscape area, breaking it down to a smaller threshold or to 1,000 square feet of landscaped area. Mr. Corbett stated that there are significant advantages for a business to do this because there are different rates for domestic and irrigation waters. He noted that water use is a common measurement for sewer capacity and use, and by separating out irrigation, it portrays a more accurate picture of the true sewer usage of a building. He added that the connection fees for two smaller meters are typically significantly less than the fee for one larger rneter. In response to Commissioner O'Connor's inquiry regarding connection fee costs, Mr. Corbett replied that a connection cost is paid for each meter but that there are different rates are for domestic water and irrigation water. Commissioner O'Connor inquired if staff was requiring only non - residential projects and not residential projects to meet Tier 1 standard. EXCERPT: PLANNING COMMISSION MINUTES, September 29, 2010 Page 6 of 15