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Managing Stormwater Sediment Best Management Practices

Minnesota Pollution Control Agency [MPCA] 

In May 2017, Minnesota Pollution Control Agency issued the Managing Stormwater Sediment Best Management Practices Guidance.  Within this document, Appendix A discusses sediment sampling techniques and analytical technical guidance. MPCA requires the sampling of sediment from stormwater ponds prior to disposal.  Responsible parties or owners are required to test sediments for 17 carcinogenic PAHs [cPAHs], 10 non-carcinogenic PAHs, arsenic and copper. In addition, if there is indication for potential release of other constituents of concern into the sediment, these compounds should be added to the program as well. 

TestAmerica’s Analytical Approach

TestAmerica Nashville offers analytical testing for the full list of 27 Minnesota stormwater PAHs, including the cPAHs and non-cPAHs, utilizing SW-846 Method 8270 modified [SIM]. Please review the compound list and reporting limits for the cPAHs and non-cPAHs listed below, and contact your TestAmerica Project Manager if you have any questions.

CASRN

MPCA Carcinogenic PAHs

Reporting Limit [ug/Kg]

Reporting Limit [ug/L]

56-55-3

Benz[a]anthracene

0.66

0.02

50-32-8

Benzo[a]pyrene

0.66

0.02

205-99-2

Benzo[b]fluoranthene

0.66

0.02

205-82-3

Benzo[j]fluoranthene

0.66

0.02

207-08-9

Benzo[k]fluoranthene

0.66

0.02

218-01-9

Chrysene

0.66

0.02

192-65-4

Dibenzo[a,e]pyrene

0.66

0.02

189-64-0

Dibenzo[a,h]pyrene

0.66

0.02

189-55-9

Dibenzo[a,i]pyrene

0.66

0.02

191-30-0

Dibenzo[a,l]pyrene

0.66

0.02

193-39-5

Indeno[1,2,3-cd]pyrene

0.66

0.02

3697-24-3

5-Methylchrysene

0.66

0.02

53-70-3

Dibenz[a,h]anthracene

0.66

0.02

226-36-8

Dibenz[a,h]acridine

0.66

0.02

194-59-2

7H-DiBenzo[c,g]carbazole

0.66

0.02

57-97-6

7,12-Dimethylbenzanthracene

0.66

0.02

56-49-5

3-Methylcholanthrene

0.66

0.02

CASRN

MPCA Noncarcinogenic PAHs

Reporting Limit [ug/Kg]

Reporting Limit [ug/L]

83-32-9

Acenaphthene

0.66

0.02

208-96-8

Acenaphthylene

0.66

0.02

120-12-7

Anthracene

0.66

0.02

‎191-24-2

Benzo[g,h,i]perylene

0.66

0.02

206-44-0

Fluoranthene

0.66

0.02

86-73-7

Fluorene

0.66

0.02

91-57-6

2-Methylnaphthalene

0.66

0.02

91-20-3

Naphthalene

0.66

0.02

‎85-01-8

Phenanthrene

0.66

0.02

‎129-00-0

Pyrene

0.66

0.02

Footnote:  Bold Compounds are TCL PAHs; unbolded are non-standard PAHs

For metals analysis, including arsenic and copper, TestAmerica Nashville recommends the use of SW-846 Method 6020 utilizing a Collison Cell.  TestAmerica also offers testing for a number of other sediment methods, including TOC and Grain Size analysis.

The technical guidance recommends the following to the program:

  • Collection of one field replicate sample for every 10 samples of less collected for the analysis [10% frequency];
  • If the budget allows, a matrix spike/matrix spike duplicate for each pond being sampled;
  • Laboratories must employ (at a charge) the use of organic extraction cleanup procedures, such as alumina and/or silica gel to reduce matrix interferences; and
  • All data must be reported on a dry weight basis.