The Dover Township WWTP Laboratory has two equally important responsibilities.  First, the laboratory must prove to State and Federal agencies that the clean water discharged into the creek and the biosolids that become agricultural soil amendments meet or exceed all regulatory levels.  Second, the laboratory needs to monitor the treatment process and relay information to the operators.  This enables them to effectively and efficiently control the treatment process.


The Laboratory is accredited by the State and must conform to Chapter 252 regulations.  Chapter 252 (Environmental Laboratory Accreditation Act) was established in 2006 to “protect the public health, safety, welfare, and environment by ensuring the accuracy, precision, and reliability of data generated by environmental laboratories” (Section 252.2).  We are accredited under the Non-Potable Water for the field of Basic Non-Potable Water Category, as well as, Solids and Chemical Materials for the field of Inorganic Non-metals.


The laboratory is currently staffed with a Supervisor and one Laboratory Technician whom are both certified operators and must have a degree in a Science related field.  State accreditation and The Chesapeake Bay requirements have expanded our array of testing in the past couple of years.  They have also intensified the quality control and internal monitoring to about 25% of all samples analyzed.  This increase prompted us to look into automation.  In 2006, the laboratory purchased a Discrete Analyzer to save on the cost of out-sourcing certain parameters (i.e. Nitrate + Nitrite Nitrogen), accelerate the testing process and for its “walk away” capability.  The laboratory also purchased an Automated Block Digester with Distillation for Total Kjeldahl Nitrogen.

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Laboratory Pictures


The laboratory is also involved with trouble-shooting the treatment processes, researching and/or improving methodologies, and assist in the data management system.  Laboratory tours are provided as form of community service to schools and residents in area.  The laboratory uses MAGIC to show the treatment process from the headworks to the final discharge into the receiving creek.  This gives the community more of a chemical and biological understanding of the wastewater treatment process.


Here are some analyses performed in this laboratory:


 NPDES Permit Required Tests


Carbonaceous Biochenical Oxygen Demand

Biochemical Oxygen Demand

Total Suspended Solids

Total Phosphorus

Ammonia Nitrogen


Fecal Coliform

Dissolved Oxygen

Nitrate + Nitrite Nitrogen

Total Kjeldahl Nitrogen

Total Nitrogen


 Process Control Tests


Total Solids

Total Volatile Solids

Specific Oxygen Uptake Rate (SOUR)

Microscan (Click here to see pictures)

Mixed Liquor Suspended Solids

Settleable Solids


Other Links: 

PA DEP Laboratory Accreditation

Chapter 252 with proposed updates

Clean water today for a better tomorrow!