BC Compliance News: January 2024 environmental regulations
7 PFAS added to TRI list for Reporting Year 2024Comparison of Three Wet Weather Flow Treatment Alternatives to Increase Plant Capacity
…operating at filtration rates of 7.5 gpm/sf. Chemically enhanced sedimentation testing was inconclusive due to equipment malfunctions during testing. At the time of this writing, additional wet weather testing was…
Use of Flocculation Concepts to Improve Secondary Clarified Performance
This paper describes how bench-scale flocculation tests were scaled up to design plant scale flocculators in secondary clarifiers to yield markedly improved plant performance. Bench-scale tests were conducted to test…
Colorado Water Treatment Plant Optimization Study
…laboratory analysis and filter loading rate testing, backwashing procedures were evaluated for effectiveness and efficiency. This test revealed that the plant was over washing their filters (shown in photo below)…
Making a Trickling Filter/Solids Contact Process Work for Cold Weather Nitrification and Phosphorus Removal
…ammonia-nitrogen of 3 mg/L. Four processes were tested; among these, the trickling filter/solids contact (TF/SC) process had not been tested previously for consistent nitrification in colder climates where average monthly…
Anaerobic Phased Solids Digestion of Mixed Wastes
…batch fed hydrolysis digestion tanks with a methanogen-friendly biogasification tank using intermittent circulation of free liquid between the tanks. Lab scale testing has been followed by a commercial demonstration system…
Application of A Tracer Test to Determine Leak Location In An Underground Jet Fuel Line
In early 1998, a catastrophic release of JP-4 jet fuel occurred from a subsurface fuel loop. A helium test method was selected to investigate the lines because of its cost-effectiveness,…
BC Compliance News: February 2022 environmental regulations
2022 kicks off with TRI list changes while greenhouse gas standards see renewed focusBC earns a Top Score for LGBTQ+ Workplace Equality
…The CEI rates companies on detailed criteria falling under four central pillars: non-discrimination policies across business entities; equitable benefits for LGBTQ+ workers and their families; supporting an inclusive culture; and…
BC Compliance News: February 2024 environmental regulations
Stronger air quality standards could impact permit requirements
Brown and Caldwell's offices in San Francisco, 1954