Did ya know? Presented by Dave Johnson Muskegon County Wastewater - PowerPoint PPT Presentation

Did ya ’ know? Presented by Dave Johnson Muskegon County Wastewater Management System E-mail: johnsonda@co.muskegon.mi.us

www.federalregister.gov

If your lab uses Standard Methods Online edition, you’re golden.

 Fecal Coliform (MPN)  Total Phosphorus  Fecal Coliform (mFC)  COD  Ammonia  Oil and Grease  BOD/CBOD  Metals by Flame AA  pH  Metals by GFAA  Residual Chlorine  Metals By ICP  DO  Metals by ICP-MS  TSS/VSS  Hg by CVAA  Temperature  Total Cyanide  Hardness  Total Phenols

www.standardmethods.org/ PDF/EPA_Acceptable_ Version_WW_6-20-2012 _final.pdf

 Fecal Coliform (MPN)  Total Phosphorus  Fecal Coliform (mFC)  COD  Ammonia  Oil and Grease  BOD/CBOD  Metals by Flame AA  pH  Metals by GFAA  Residual Chlorine  Metals By ICP  DO  Metals by ICP-MS  TSS/VSS  Hg by CVAA  Temperature  Total Cyanide  Hardness  Total Phenols

 Fecal Coliform (MPN)  Total Phosphorus  Fecal Coliform (mFC)  COD  Ammonia  Oil and Grease  BOD/CBOD  Metals by Flame AA  pH  Metals by GFAA  Residual Chlorine  Metals By ICP  DO  Metals by ICP-MS  TSS/VSS  Hg by CVAA  Temperature  Total Cyanide  Hardness  Total Phenols

 Fecal Coliform (MPN)  Total Phosphorus  Fecal Coliform (mFC)  COD  Ammonia  Oil and Grease  BOD/CBOD  Metals by Flame AA  pH  Metals by GFAA  Residual Chlorine  Metals By ICP  DO  Metals by ICP-MS  TSS/VSS  Hg by CVAA  Temperature  Total Cyanide  Hardness  Total Phenols

 Fecal Coliform (MPN)  Total Phosphorus  Fecal Coliform (mFC)  COD  Ammonia  Oil and Grease  BOD/CBOD  Metals by Flame AA  pH  Metals by GFAA  Residual Chlorine  Metals By ICP  DO  Metals by ICP-MS  TSS/VSS  Hg by CVAA  Temperature  Total Cyanide  Hardness  Total Phenols

New criterion for incubation time:

New criterion for incubation time: 5 Days ± 6 Hours (Section 5, Part i)

New requirement for the Glucose-Glutamic Acid Check (GGA)

Set up THREE GGA samples. The average Measured BOD of the three samples must be 198 ± 30.5 mg/L (Section 6, Part b)

New instructions for determining the detection limit for a sample.

For samples with NO SEED and NO DILUTION : The detection limit equals the detection limit of the DO measurement method. ( i.e., around 0.1 mg/L) (Section 8, Part b)

For samples with NO SEED but which ARE DILUTED : The detection limit equals 2 mg/L multiplied by the dilution factor. (Section 8, Part b)

For samples which are SEEDED and DILUTED : The detection limit equals 2 mg/L minus the seed correction, multiplied by the dilution factor. (Section 8, Part b)

For samples which are SEEDED and DILUTED , the actual text does not say to multiply by the dilution factor. However, common sense would dictate otherwise.

For samples which are SEEDED but NOT DILUTED : The detection limit is 0 mg/L. (Section 8, Part b)

DO by Winkler & DO by Membrane Electrode

New Minimum QC Requirements

Sample Duplicate (T ABLE 4020:I. M INIMUM Q UALITY C ONTROL FOR M ETHODS IN P ART 4000)

Zero Check with Zero Oxygen Sample (T ABLE 4020:I. M INIMUM Q UALITY C ONTROL FOR M ETHODS IN P ART 4000)

How do you prepare a Zero Oxygen Sample? SM gives a vague recipe:

“Add excess sodium sulfite, Na 2 SO 3 , and a trace of cobalt chloride, CoCl 2 , to bring DO to zero.” (SM 4500-O G-2001, Section 3, Part a)

 20 g sodium sulfite, Na 2 SO 3  10 mg cobalt chloride, CoCl 2 (a few crystals)  1 L water Dissolve with stir bar and stir plate. Good for 8 hours.

 1 g sodium sulfite, Na 2 SO 3  10 mg cobalt chloride, CoCl 2 (a few crystals)  1 L water Dissolve with stir bar and stir plate. Good for 30 min., maybe longer.

Carefully pour the standard into a BOD bottle up to the neck. Add your Winkler reagents and titrate.

Carefully pour a portion of the standard into a beaker to attain a depth of 2 to 3 inches. Submerge the DO probe so that the tip is near the bottom of the beaker. Swirl gently and read.

One manual for a Thermo membrane electrode meter says that the probe must be inserted in the zero standard for at least 5 minutes. Another says 2.5 minutes.

There are some surprises in store for you when you explore the new versions of the Standard Methods methods.