As used in this section:
a. 
Sewage shall mean liquid or solid waste substance, together with any groundwater, surface water, or storm waters that may be present, which is associated with human or animal habitation or activity, or which contains or may be contaminated with human or animal excrement or offal, and includes wastewater, wastewater effluent, sewage sludge, and/or supernatant liquid.
No person shall collect, discharge or deposit, or cause or suffer to be collected, discharged or deposited, any sewage, sewage effluent or garbage from more than one building in the City or into streams or bodies of water where the same is or may be carried through or upon areas of the City, or make use of City roads or highways therefor, without first securing in the manner hereinafter provided a permit from the City Council so to do, and at all times having an unrevoked permit therefor. No person shall collect, discharge or deposit any such sewage which creates a public nuisance in the City.
a. 
Application. Every person seeking a permit to do any of the acts described in Section 6.7.104 shall file with the City Council a written application therefor.
b. 
Content. The application shall contain a complete and detailed plan, description and history of the existing or proposed lines, works, system, procedures, or purification plant through which such waste matter is proposed to be collected and discharged.
c. 
Investigation. The Council may direct the County Health Officer and/or the City Engineer to investigate the existing or proposed system or plant, and report to the Council.
d. 
Findings; Permit. If the Council determines as a fact that the waste matter being or to be so collected, discharged or deposited does not or will not constitute a public nuisance, and does not or will not emit disagreeable odors or fumes offensive to the public in the vicinity of such place of collection or deposit or passing over and along public highways adjacent thereto, it may grant a permit authorizing the petitioner to collect, deposit or discharge or to continue to collect, deposit or discharge such substance.
e. 
Revocation; Suspension. All permits are revocable by the Council at any time, and also may be suspended by the Council if it finds as a fact that the substance collected, discharged or deposited by virtue thereof constitutes a public nuisance or emits disagreeable odors or smells offensive to the public in the vicinity thereof or passing over and along public highways adjacent thereto or any permit term, limitation or condition has been violated.
Every person engaged in, or applying for a permit to engage in, any activity regulated by this chapter shall allow the County Health Officer and/or City Engineer and/or any of their therefor-designated subordinates to enter and inspect the place, facilities and activities, for compliance with this chapter, during reasonable hours, upon demand identifying the official and his/her purpose hereunder.
This section does not apply to a septic tank-chemical toilet cleaner as defined in Section 413-3.420 of the Contra Costa County Code, having a valid, unrevoked, unsuspended public health license issued therefor pursuant to the provisions of Chapter 4.13 of the Contra Costa County Code.