Laboratory Analyses

Microbiology

Our laboratory is ELAP certified to conduct microbiological testing for total and fecal coliforms and enterococcus bacteria using both multiple tube fermentation and IDEXX methods.

Parameter Method* Holding Time Temperature
IDEXX
Total Coliform SM 9223 B 6 hours 4° C
Escherichia coli SM 9223 B 6 hours 4° C
Enterococcus SM 9230 D 6 hours 4° C
Multiple Tube Technique
Total Coliform SM 9221 B 6 hours 4° C
Fecal Coliform SM 9221 F 6 hours 4° C
Enterococcus SM 9230 B 6 hours 4° C

*SM:  Standard Methods for the Examination of Water & Wastewater, 2012

Particle Size Analysis

Sediment and stormwater particle size distributions are measured using a Horiba LA920 laser diffraction particle size analyzer in accordance with Standard Methods 2560 C (APHA, 1998). The analyzer is capable of measuring particle sizes ranging from silt and clay (<0.5 μm) up to course sand (2,000 μm).

Particle Size Method* Holding Time Temperature
Matrix Water SM 2560 D ASAP 4° C
Matrix Sediment SM 2560 D  6 months 4° C

*SM:  Standard Methods for the Examination of Water & Wastewater, 2012

Taxonomic Services

We provide sorting and identification services for benthic marine, freshwater and estuarine invertebrates, as well as periphyton (algae) and ichthyoplankton.