Section 12.34 MANUFACTURING DISTRICTS This section is included in your selections. Sections: 12.34.010 M-1 limited manufacturing district. 12.34.020 M-2 heavy manufacturing district. 12.34.030 M-3 mineral extraction district (8/6/02). 12.34.040 M-4 sanitary landfill and hazardous waste disposal district (8/20/91).