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04/10 MFE
LEGEND
II Total Samples
11 Detects
II Detects > GSI
King Highway Landfill OU 2003 -2009
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Kzoo/PlainwelVGW Monitoring/GW Handoutcdr 0
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12th Street Landfill OU 1995
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Willow Blvd/A-Site Landfill OU 2000
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All Landfill OUs 1995-2009
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Allied Paper, Inc. Landfill OU Groundwater
2002-2003
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Allied Paper, Inc. Landfill OU Seeps
2002-2003
Page 1
PCB flux calculated using MDNRE approach to calculating mixing zone-based GSI criteria, assuming: • Hydraulic conductivity of 10-3 cm/s • Hydraulic gradients ranging from 0.13 to 0.205 ft/ft • River flow from 350 to 1,061 cfs • PCB concentrations of Y2 detection limit (0.024 µg/L) • Upstream PCB concentration of 0 µg/L
Average annual groundwater PCB flux loads range from 0.014 to 0.032 kg/yr
One year of bank erosion equals 700 to 1,500 years of groundwater flux.
Worksheet for Estimating Flux of PCBs in Former Plainwell lmpoundment Groundwater to Kalamazoo River
p
G'raundwateli Discharge - - -.: - - - - ---- - - - r I -
11
I Fi.nal Average t:
Area Hydraulic Hydrraulic Groundwater Qeslgn D'ilution 1 Avei:age ' Upstream. AverageGW Generic
~ 1• lnstream
Parameter CQnductlvity Gradient (i) FIQW (Qp) Stream Flow Ratio Concentration Goncentation Concentration
PCB ILoad GSI Value tength D~ptfl Area (k) (ft/sec) (ftJft) 1 (cfS) I (QsJ {Cfs )2 (Qs/Qp) (ugnf (ug/I) (JCgf~r) (ug/L) ' I (ft) (ft) (sq ft) -~
' (ugll) r. I
' - ··-- - -
Min Hydraulic Gradient 10000 15 150000 0.00003281 0.13 0.6398 350 547 0.024 0 0.000044 0.013711 0.2 Avg observed hyd gradient 10000 15 150000 0.00003281 0.205 1.0089 350 347 0.024 0 0.000069 0.021622 0.2 Max observed hyd gradient 10000 15 150000 0.00003281 0.3 1.4764 350 237 0.024 0 0.000101 0.031642 0.2 With 30-year Harmonic Mean 10000 15 150000 0.00003281 0.13 0.6398 1061 1659 0.024 0 0.000014 0.013711 0.2 With 30-year Harmonic Mean 10000 15 150000 0.00003281 0.205 1.0089 1061 1052 0.024 0 0.000023 0.021622 0.2 With 30-year Harmonic Mean 10000 15 150000 0.00003281 0.3 1.4764 1061 719 0.024 0 0.000033 0.031642 0.2 With 90-year Harmonic Mean 10000 15 150000 0.00003281 0.13 0.6398 864 1350 0.024 0 0.000018 0.013711 0.2 With 90-year Harmonic Mean 10000 15 150000 0.00003281 0.205 1.0089 864 856 0.024 0 0.000028 0.021622 0.2 With 90:-year Harmonic Mean 10000 15 150000 0.00003281 0.3 1.4764 864 585 0.024 0 0.000041 0.031642 0.2
NOTES: Worksheet derived from MDEQ Operational Memorandum RRD-5, Attachment 1 - Request to MDEQ for Mixing Zone-Based GSI Criteria (http://www.michigan.gov/documents/deq/deq-rrd-OpMemo_5_Form_286639_7.pdf). 1Based on groundwater and surface water elevation monitoring. 2Based on Comstock gage station data and increased by 25% to adjust for drainage area. 3Based on one-half the detection limit.
04/10MFE Kzoo/Plainwell/GW Monitoring/GW Handout.cdr
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