The City of San Diego provides you with direct access to bidding and contracting opportunities on all its construction projects. This living manual has been developed to give you, the user, information needed to make the best decisions when carrying out procurement activities.How to Do Business with the Port Workshop Series. To participate, vendors must complete an ACH application. To enroll in the ACH process, suppliers should contact. We welcome all licensed contractors who are interested in submitting their company details for inclusion on the District's Informal Bidding Contractors List. Proposal Form: Complete, sign and submit form. 2.