Comparing Current and Historic Results

Oregon DEQ, Hart Crowser, Inc., and GSI Water Solutions

2010 McCormick & Baxter Groundwater Sample Results

Groundwater Monitoring WellsCurrent vs. Historic Results (TPAHs)

MW-35r: Current vs. Historic ResultsSAMPLE LOCATION MW-35r MW-35r  

Sample Date 4/25/2006 5/6/2010  Sample Time 14:35 8:11  Well Depth shallow shallowNAPL (Historically) -- --Inside/Outside Barrier Wall outside outsideCONTAMINANT OF INTEREST        

Total Metals (mg/L)        Arsenic 0.00104   0.00076  Chromium 0.000860 J 0.00041 JCopper 0.000480 U2 0.00073  

Zinc 0.00462 U2 0.00250 JPentachlorophenol (ug/L) 0.952 U 0.52 U

Polyaromatic Hydrocarbons (ug/L)        Acenaphthene 0.0476 U 0.0063 UAcenaphthylene 0.0476 U 0.0042 UAnthracene 0.0476 U 0.0053 UBenzo (a) anthracene 0.0476 U 0.0032 UBenzo (a) pyrene 0.0476 U 0.0032 UBenzo (b) fluoranthene 0.0476 U 0.0053 UBenzo (k) fluoranthene 0.0476 U 0.0053 UBenzo (ghi) perylene 0.0476 U 0.0021 UChrysene 0.0476 U 0.0053 JDibenzo (a,h) anthracene 0.0952 U 0.0077 UJFluoranthene 0.0476 U 0.012 JFluorene 0.0476 U 0.0032 UIndeno (1,2,3-cd) pyrene 0.0476 U 0.0042 UNapthalene 0.0476 U 0.02 JPhenanthrene 0.0476 U 0.0084 JPyrene 0.0476 U 0.0064 JTotal LPAHs 0.1428 U 0.0284 JTotal HPAHs 0.2618 U 0.0237 JTotal Carcinogenic PAHs 0.2142 U 0.0053 JTotal PAHs 0.4046 U 0.0521 J

PAHs detected at much lower detection limits

PCP = ND

Metals = Similar

MW-37s: Current vs. Historic ResultsSAMPLE LOCATION MW-37s MW-37sSample Date 5/8/2006 5/6/2010Sample Time 9:26 14:20Well Depth shallow    NAPL (Historically) --    Inside/Outside Barrier Wall outside    CONTAMINANT OF INTEREST        Total Metals (mg/L)        Arsenic 0.00213   0.00550  Chromium 0.00252   0.00150  Copper 0.00153 J 0.00120  Zinc 0.00350 U2 0.00210 JPentachlorophenol (ug/L) 31.6   158  

Polyaromatic Hydrocarbons (ug/L)        Acenaphthene 8.89 J5 44.7  Acenaphthylene 0.25 U 1  Anthracene 0.442   0.76  Benzo (a) anthracene 0.109   0.0031 UBenzo (a) pyrene 0.0853 J5 0.0031 UBenzo (b) fluoranthene 0.111   0.0052 UBenzo (k) fluoranthene 0.107   0.0052 UBenzo (ghi) perylene 0.0878 J 0.0021 UChrysene 0.111   0.0031 UDibenzo (a,h) anthracene 0.1 U 0.008 UJFluoranthene 0.257   0.13  Fluorene 2.52   18.8  Indeno (1,2,3-cd) pyrene 0.0898 J 0.0041 UNapthalene 50   406  Phenanthrene 1.18   4.4  Pyrene 0.193   0.1  Total LPAHs 63.032   475.66  Total HPAHs 1.1509   0.23  Total Carcinogenic PAHs 0.7009   0.01695 UTotal PAHs 64.1829   475.89  

LPAHs are an order of magnitude higher

cPAHs are ND (lower)

PCP is higher

Metals are low and similar to 2006

MW-37i: Current vs. Historic ResultsSAMPLE LOCATION MW-37i MW-37iSample Date 5/4/2006 5/6/2010Sample Time 16:32 13:35Well Depth intermediate    NAPL (Historically) --    Inside/Outside Barrier Wall outside    CONTAMINANT OF INTEREST        Total Metals (mg/L)        Arsenic 0.0513   0.03880  Chromium 0.00824   0.00240  Copper 0.00476   0.00460  Zinc 0.0114   0.01310  Pentachlorophenol (ug/L) 9.9 U 0.53 UPolyaromatic Hydrocarbons (ug/L)        Acenaphthene 0.0495 U 6.6  Acenaphthylene 0.0495 U 0.039 JAnthracene 0.0495 U 0.043  Benzo (a) anthracene 0.0495 U 0.0032 UBenzo (a) pyrene 0.0495 U 0.0032 UBenzo (b) fluoranthene 0.0495 U 0.0053 UBenzo (k) fluoranthene 0.0495 U 0.0053 UBenzo (ghi) perylene 0.0495 U 0.0021 UChrysene 0.0495 U 0.0032 UDibenzo (a,h) anthracene 0.99 U 0.0078 UJFluoranthene 0.0495 U 0.011 JFluorene 0.0495 U 0.34  Indeno (1,2,3-cd) pyrene 0.0495 U 0.0042 UNapthalene 47.4   0.3  Phenanthrene 0.0495 U 0.0033 JPyrene 0.0495 U 0.011 JTotal LPAHs 47.4   7.3253  Total HPAHs 0.71775 U 0.022  Total Carcinogenic PAHs 0.66825 U 0.01715 UTotal PAHs 48.11775   7.3473  

LPAHs = lower

CPAHs = ND

PCP = ND

Metals = similar

MW-37d: Current vs. Historic ResultsSAMPLE LOCATION MW-37d MW-37dSample Date 5/16/2006 5/6/2010Sample Time 15:47 13:09Well Depth deep    NAPL (Historically) --    Inside/Outside Barrier Wall outside    CONTAMINANT OF INTEREST        Total Metals (mg/L)        Arsenic 0.0353   0.00170  Chromium 0.000605 U 0.00024 UCopper 0.0105   0.00320  Zinc 0.00966 J 0.03410  Pentachlorophenol (ug/L) 0.98 U 0.51 UPolyaromatic Hydrocarbons (ug/L)        Acenaphthene 1.15   0.11  Acenaphthylene 0.049 U 0.004 UAnthracene 0.125 U2 0.059  Benzo (a) anthracene 0.049 U 0.003 UBenzo (a) pyrene 0.049 U 0.003 UBenzo (b) fluoranthene 0.049 U 0.005 UBenzo (k) fluoranthene 0.049 U 0.005 UBenzo (ghi) perylene 0.049 U 0.002 UChrysene 0.049 U 0.003 UDibenzo (a,h) anthracene 0.098 U 0.0075 UJFluoranthene 0.049 U 0.004 UFluorene 0.049 U 0.003 UIndeno (1,2,3-cd) pyrene 0.0495 U 0.004 UNapthalene 28.2   0.005 UPhenanthrene 0.049 U 0.006 UPyrene 0.049 U 0.006 UTotal LPAHs 29.35   0.169  Total HPAHs 0.26975 U 0.02125 UTotal Carcinogenic PAHs 0.22075 U 0.01625 UTotal PAHs 29.35   0.169  

LPAHs = lower

cPAHs = ND

PCP = ND

Metals = lower except Zn

MW-39s: Current vs. Historic ResultsSAMPLE LOCATION MW-39s MW-39sSample Date 5/8/2006 5/6/2010Sample Time 16:45 11:01Well Depth shallow    NAPL (Historically) --    Inside/Outside Barrier Wall outside    CONTAMINANT OF INTEREST        Total Metals (mg/L)        Arsenic 0.0153   0.01210  Chromium 0.0111   0.00140  Copper 0.00719   0.00170  Zinc 0.0120   0.00280 JPentachlorophenol (ug/L) 1 U 0.54 UPolyaromatic Hydrocarbons (ug/L)        Acenaphthene 0.373 J5 0.0021 JAcenaphthylene 0.0583 J 0.0041 UAnthracene 0.246   0.051  Benzo (a) anthracene 0.0927 J 0.0031 UBenzo (a) pyrene 0.0707 J5 0.0031 UBenzo (b) fluoranthene 0.0862 J 0.0051 UBenzo (k) fluoranthene 0.087 J 0.0051 UBenzo (ghi) perylene 0.0586 J 0.002 UChrysene 0.11   0.0031 UDibenzo (a,h) anthracene 0.1 U 0.0077 UJFluoranthene 0.264   0.026 JFluorene 0.29   0.011 JIndeno (1,2,3-cd) pyrene 0.0575 J 0.0041 UNapthalene 0.195   0.0051 UPhenanthrene 0.156   0.0061 UPyrene 0.195   0.023 JTotal LPAHs 1.3183   0.0791 JTotal HPAHs 1.0217   0.034 JTotal Carcinogenic PAHs 0.5627   0.01665 UTotal PAHs 2.34   0.1131  

LPAHs = lower

cPAHs = 2010 ND (lower)

PCP = ND

Metals = lower

MW-41s: Current vs. Historic ResultsSAMPLE LOCATION MW-41s MW-41s  Sample Date 5/8/2006 5/6/2010  Sample Time 13:32 12:08  Well Depth shallow    NAPL (Historically) --    Inside/Outside Barrier Wall outside    CONTAMINANT OF INTEREST        Total Metals (mg/L)        Arsenic 0.00435   0.00250  Chromium 0.0246   0.00200  Copper 0.00746   0.00130  Zinc 0.00940   0.00210 JPentachlorophenol (ug/L) 0.99 U 0.53 UPolyaromatic Hydrocarbons (ug/L)        Acenaphthene 0.79 J5 0.017  Acenaphthylene 0.0697 J 0.0042 UAnthracene 0.125   0.059  Benzo (a) anthracene 0.0724 J 0.0032 UBenzo (a) pyrene 0.055 J5 0.0032 UBenzo (b) fluoranthene 0.0633 J 0.0053 UBenzo (k) fluoranthene 0.0695 J 0.0053 UBenzo (ghi) perylene 0.0573 J 0.0021 UChrysene 0.0803 J 0.0032 UDibenzo (a,h) anthracene 0.099 U 0.0081 UJFluoranthene 0.22   0.0082 JFluorene 0.436   0.17  Indeno (1,2,3-cd) pyrene 0.056 J 0.0042 UNapthalene 1.76   0.0053 UPhenanthrene 0.228   0.023 JPyrene 0.155   0.008 JTotal LPAHs 3.4087   0.269 JTotal HPAHs 0.8288   0.0162 JTotal Carcinogenic PAHs 0.4538   0.0173 UTotal PAHs 4.2375   0.2852 J

LPAHs = lower

cPAHs = 2010 NDlower

PCP = ND

Metals = lower

MW-47s: Current vs. Historic ResultsSAMPLE LOCATION MW-47s MW-47s  Sample Date 4/27/2006 5/6/2010  Sample Time 9:42 12:20  Well Depth shallow    NAPL (Historically) --    Inside/Outside Barrier Wall outside    CONTAMINANT OF INTEREST        Total Metals (mg/L)        Arsenic 0.0135   0.01070  Chromium 0.00106   0.00150  Copper 0.000212 J 0.00180  Zinc 0.00186 J 0.00480 JPentachlorophenol (ug/L) 0.962 U 0.53 UPolyaromatic Hydrocarbons (ug/L)        Acenaphthene 1.95   2.1  Acenaphthylene 0.0481 U 0.0043 UAnthracene 0.0632 J 0.023 JBenzo (a) anthracene 0.0481 U 0.0032 UBenzo (a) pyrene 0.0481 U 0.0032 UBenzo (b) fluoranthene 0.0481 U 0.0054 UBenzo (k) fluoranthene 0.0481 U 0.0054 UBenzo (ghi) perylene 0.0481 U 0.0022 UChrysene 0.0481 U 0.0032 UDibenzo (a,h) anthracene 0.0962 U 0.008 UJFluoranthene 0.0487 J 0.018 JFluorene 0.0868 J 0.0032 UIndeno (1,2,3-cd) pyrene 0.0481 U 0.0043 UNapthalene 0.0481 U 0.0054 UPhenanthrene 0.131   0.048  Pyrene 0.0481 U 0.014 JTotal LPAHs 2.231   2.171 JTotal HPAHs 0.0487   0.032 JTotal Carcinogenic PAHs 0.21645 U 0.01745 UTotal PAHs 2.2797   2.203 J

LPAHs = similar

cPAHs = ND

PCP = ND

Metals = similar

MW-53s: Current vs. Historic ResultsSAMPLE LOCATION MW-53s MW-53sSample Date 4/26/2006 5/6/2010Sample Time 10:25 10:10Well Depth shallow    NAPL (Historically) --    Inside/Outside Barrier Wall outside    CONTAMINANT OF INTEREST        Total Metals (mg/L)        Arsenic 0.0132   0.01810  Chromium 0.00102   0.00120  Copper 0.00125 J 0.00710  Zinc 0.00688   0.01030  Pentachlorophenol (ug/L) 1650   68.4  Polyaromatic Hydrocarbons (ug/L)      Acenaphthene 0.0472 U 0.011 JAcenaphthylene 0.0472 U 0.0041 UAnthracene 0.474   0.16  Benzo (a) anthracene 0.0472 U 0.0031 UBenzo (a) pyrene 0.0472 U 0.0031 UBenzo (b) fluoranthene 0.0472 U 0.0051 UBenzo (k) fluoranthene 0.0472 U 0.0051 UBenzo (ghi) perylene 0.0472 U 0.0021 UChrysene 0.0472 U 0.0031 UDibenzo (a,h) anthracene 0.0943 U 0.0078 UJFluoranthene 0.0472 U 0.011 JFluorene 0.0472 U 0.017 JIndeno (1,2,3-cd) pyrene 0.0472 U 0.0041 UNapthalene 0.0472 U 0.45  Phenanthrene 0.0472 U 0.019 JPyrene 0.0933 J 0.014 JTotal LPAHs 0.474   0.657 JTotal HPAHs 0.0933   0.025 JTotal Carcinogenic PAHs 0.21235 U 0.01675 UTotal PAHs 0.5673   0.682 J

LPAHs = similar

cPAHs = ND

PCP = 2 orders of magnitude lower

Metals = similar

MW-55s: Current vs. Historic ResultsSAMPLE LOCATION MW-55s MW-55sSample Date 4/26/2006 5/6/2010Sample Time 9:02 9:10Well Depth shallow    NAPL (Historically) --    Inside/Outside Barrier Wall outside    CONTAMINANT OF INTEREST        Total Metals (mg/L)        Arsenic 0.00547   0.00180  Chromium 0.000480   0.00086  Copper 0.000580 U2 0.00210  Zinc 0.00751   0.00600  Pentachlorophenol (ug/L) 0.952 U 0.51 UPolyaromatic Hydrocarbons (ug/L)        Acenaphthene 0.0476 U 0.0061 UAcenaphthylene 0.0476 U 0.0041 UAnthracene 0.146   0.022 JBenzo (a) anthracene 0.0476 U 0.0031 UBenzo (a) pyrene 0.0476 U 0.0031 UBenzo (b) fluoranthene 0.0476 U 0.0051 UBenzo (k) fluoranthene 0.0476 U 0.0051 UBenzo (ghi) perylene 0.0476 U 0.002 UChrysene 0.0476 U 0.0031 UDibenzo (a,h) anthracene 0.0952 U 0.0077 UJFluoranthene 0.0476 U 0.013 JFluorene 0.0476 U 0.0034 JIndeno (1,2,3-cd) pyrene 0.0476 U 0.0041 UNapthalene 0.0476 U 0.0051 UPhenanthrene 0.0476 U 0.0099 JPyrene 0.0476 U 0.0092 JTotal LPAHs 0.146   0.0353 JTotal HPAHs 0.2618 U 0.0222 JTotal Carcinogenic PAHs 0.2142 U 0.01665 UTotal PAHs 0.4078   0.0575 J

LPAHs = lower

cPAHs = ND

PCP = ND

Metals = similar Cu higher

MW-58s: Current vs. Historic ResultsSAMPLE LOCATION MW-58s MW-58sSample Date 5/9/2006 5/6/2010Sample Time 13:56 10:36Well Depth shallow    NAPL (Historically) --    Inside/Outside Barrier Wall outside    CONTAMINANT OF INTEREST        Total Metals (mg/L)        Arsenic 0.00309   0.00062  Chromium 0.00347   0.00110  Copper 0.00343   0.00230  Zinc 0.00368 U2 0.00290 JPentachlorophenol (ug/L) 0.952 U 0.56 UPolyaromatic Hydrocarbons (ug/L)        Acenaphthene 0.325 J5 0.0065 UAcenaphthylene 0.0476 U 0.0043 UAnthracene 0.0499 J 0.0084 JBenzo (a) anthracene 0.0476 U 0.0033 UBenzo (a) pyrene 0.0476 U 0.0033 UBenzo (b) fluoranthene 0.0476 U 0.0054 UBenzo (k) fluoranthene 0.0476 U 0.0054 UBenzo (ghi) perylene 0.0476 U 0.0022 UChrysene 0.0476 U 0.0033 UDibenzo (a,h) anthracene 0.0952 U 0.0081 UJFluoranthene 0.0697 J 0.0043 UFluorene 0.182   0.0057 JIndeno (1,2,3-cd) pyrene 0.0476 U 0.0043 UNapthalene 1.31   0.0054 UPhenanthrene 0.0683 J 0.0065 UPyrene 0.0797 J 0.0065 UTotal LPAHs 1.9352   0.0141 JTotal HPAHs 0.1494   0.02305 UTotal Carcinogenic PAHs 0.2142 U 0.01765 UTotal PAHs 2.0846   0.0141 J

LPAHs = lower

cPAHs = ND

PCP = ND

Metals = lower/similar

MW-19s: Current vs. Historic ResultsSAMPLE LOCATION EW-19s3 EW-19sSample Date 5/17/2006 5/6/2010Sample Time 14:12 14:55Well Depth shallow    NAPL (Historically) NAPL    Inside/Outside Barrier Wall outside    CONTAMINANT OF INTEREST        Total Metals (mg/L)        Arsenic 0.00216   0.00340  Chromium 0.000380 J 0.00250  Copper 0.000620 J 0.00350  Zinc 0.00362 J 0.00200 JPentachlorophenol (ug/L) 366   428  Polyaromatic Hydrocarbons (ug/L)        Acenaphthene 67.1   111  Acenaphthylene 12.3 U 3.1  Anthracene 12.3 U 14.7  Benzo (a) anthracene 12.3 U 7.3  Benzo (a) pyrene 12.3 U 2.9  Benzo (b) fluoranthene 12.3 U 4.9  Benzo (k) fluoranthene 12.3 U 1.7  Benzo (ghi) perylene 12.3 U 0.82  Chrysene 12.3 U 6.6  Dibenzo (a,h) anthracene 24.5 U 0.33 JFluoranthene 12.3 U 39.3  Fluorene 24   52.9  Indeno (1,2,3-cd) pyrene 12.3 U 0.91  Napthalene 915   284  Phenanthrene 12.3 U 88.4  Pyrene 12.3 U 28.1  Total LPAHs 1006.1   554.1  Total HPAHs 67.6 U 92.86 JTotal Carcinogenic PAHs 55.3 U 25.46 JTotal PAHs 1006.1   646.96 J

LPAHs = similar to lower

cPAHs = similar?(lower detection limits)

PCP = similar

Metals = slightly higher

Conclusions for Groundwater Sampling

Concentrations generally are lower with isolated increases; however generally in same ranges

Recommend no immediate term groundwater sampling unless associated with DNAPL Recovery System

Groundwater is not expected to change in concentrations for a long time – perhaps sample again in 20 years? – Team discussion