Established: 8/78
Revised: 7/94; 8/09
Re-titled: 2/16
FLSA: Non-Exempt
EEO: 8



Under general supervision, to operate medium and heavy trucks, including tank truck with four-wheel trailer; to operate solids handling equipment; to operate spray equipment to apply biosolids to agricultural land; and to do other work as required.


The Department of Water Environment Services manages and operates the County’s utility service districts, including sewerage facilities, collection systems, pumping stations, treatment plants and surface water management.

The Biosolids Technician 1 operates heavy duty diesel truck and trailer combinations to load, haul and unload liquids and dewatered biosolids for reuse at agricultural sites. Incumbents also load, haul and unload solid waste grit and screenings to land fills and operates solids handling equipment to prep biosolids.

The Biosolids Technician 1 differs from other truck driving or equipment operator classifications which do not handle biosolids. It also differs from the Biosolids Technician 2 that schedules personnel and equipment and makes final inspections of application sites, and also differs from the Environmental Program Coordinator which solicits disposal sites, serves as liaison with regulatory agencies and carries oversight responsibility for the reuse programs.


Duties may include but are not limited to the following:

  1. Operates medium and heavy-duty gas and diesel powered trucks and solids handling equipment to prep, load, transport and unload biosolids from wastewater treatment plants to agricultural fields; fills tanker trailer by pumping biosolids from holding tank; drives on urban streets and rural roads and highways; evaluates field conditions and operates field application equipment.
  2. Applies biosolids directly from tanker or with other application equipment; determines appropriate application pattern; operates mobile field spreading equipment.
  3. Assists in operation and maintenance activities in the collection and treatment of sewage and stormwater such as processing sludge and residuals, routine plant and grounds maintenance; loads and transports solid waste grit and screenings from wastewater treatment plant to designated hazardous waste disposal site; fills dump truck and/or trailer from holding hopper.
  4. Performs routine maintenance and minor repair of vehicles and equipment operated; inspects trucks, trailers and related equipment for safety hazards and mechanical problems; coordinates repair and servicing; maintains vehicle condition and maintenance records; washes and cleans trucks and equipment.
  5. Maintains daily records of mileage, fuel consumption, locations and amounts of biosolids applied and related information in compliance with local, state and federal regulations; takes soil samples and records field conditions.
  6. Maintains good public relations with landowners, neighbors and the public; explains biosolids application process and responds to complaints; solicits agricultural disposal sites; ensures compliance with environmental regulations.


Working knowledge of: Mechanical operation, maintenance and repair of heavy duty trucks and trailer combinations; environmental, traffic and safety laws, regulations and codes, rules and regulations governing the operation of double and triple axle trucks, tanker trailers, equipment and the land application of biosolids.

Skill to: Coordinate completion of projects within established budget and time guidelines; incorporate team participation in decision making; promote individual agreement and group consensus on issues and problems; communicate effectively, both orally and in writing; understand and follow oral and written instructions; safely and efficiently operate a variety of light and heavy duty trucks, including gasoline and diesel powered, and tanker trailers to haul liquid biosolids throughout the County in urban and rural traffic situations; safely and efficiently operate light and heavy duty trucks and trailers to haul solid waste grit to disposal site; safely and efficiently operate residuals processing equipment and equipment used to load and unload trucks, including pumps, hoists and irrigation systems; evaluate field conditions and determine best method of operation and biosolids application; ensure uniform biosolids application on fields; clear truck and trailer combinations bogged down in fields or other difficult field situations or adverse weather conditions, using chains, winch and related tools; perform manual tasks and routine maintenance on diesel engines and truck and trailer chassis; establish and maintain effective working relationships with customers, neighbors, the public and County employees.


Duties require frequent driving, walking, squatting, bending, kneeling, twisting, shoveling, climbing, fine motor control, and the ability to lift up to 60 pounds, carry, and push/pull 90 pounds. Duties also involve frequent exposure to exhaust fumes and dust, loud noises, vibration, and adverse weather conditions.


Possession of valid Class A Commercial Driver's License (CDL) with a tank endorsement and no restrictions in order to drive manual transmission.
Must pass a pre-employment drug test (DOT Regulations for CDL).

Employment is contingent upon passing a post-offer physical assessment. Accommodation requests will be reviewed on an individual basis in compliance with State and Federal legislation.


Any satisfactory combination of experience and training that demonstrates possession of the required knowledge and skills.

Edited: 08/17