SUPPLEMENT TO PRELIMINARY OFFICIAL STATEMENT DATED SEPTEMBER 13, 2019 | $442,000,000* SAN DIEGO COMMUNITY COLLEGE DISTRICT (San Diego County, California) 2019 General Obligation Refunding Bonds, Series A (Federally Taxable) | $258,000,000* SAN DIEGO COMMUNITY COLLEGE DISTRICT (San Diego County, California) 2019 General Obligation Refunding Bonds, Series B (Federally Taxable – 2023 Crossover) POS POSTED 9-10-19