Your property was in violation of City Code. According to City Code, grass and weeds must not exceed ten inches in height (Section 13-8) and owners and occupants have the responsibility to maintain a property free from litter and to store motor vehicle parts in an enclosed space (Section 13-37) on the property.
By City Ordinance Sec.13-3, the owner or person(s) in control of the property have five days from notification to correct these environmental violations that have been cited by a Code Enforcement Inspector. Should the violation(s) not be corrected within the five days, the City can have a contractor cut the weeds, remove the litter, or remove the motor vehicle parts and charge the owner or persons in control of the property for the cost.