the first for single-family is 4 ccf, the first for multifamily is 3 ccf. for our nonresidential customers variable charges, we don't have tiers. the usage characteristics are so different in that customer class, and we currently have a different volumetric rates for a very small customer type. on the waste water side, we currently have no fixed charge. all our revenues are recovered on a volumetric charge. we have no tiers, and the volumetric rate for residential charges is based on a standard strength -- standard domestic strength sewage estimate. for nonresidential customers, we have separate rates for total suspended solids, chemical oxygen demand and fats, oil and grease and those are the constituents that makeup the sewer service rate and they're actually separate for nonresidential customers and based on standard industrial classification codes. so those nonresidential customers that have very strong sewage would pay more than those that have tears. the volume metric rate is based on a stan domestic strength sewage. for now-residential customers fire