Chapter 3.05 PURCHASING This chapter is included in your selections. Sections: 3.05.010 In General. 3.05.020 Exceptions to SCC 3.05.010. 3.05.030 Bidding. 3.05.040 Determination of lowest responsible bidder. 3.05.050 Performance bond. 3.05.060 Emergency purchases. 3.05.070 Professional services. 3.05.080 Surplus supplies and equipment. 3.05.090 Signatures on checks.