memo regarding sediment chemicals of concern (coc

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Memorandum From: Bart Hoskins, EPA Ecological Risk Assessor To: David Newton, EPA Remedial Project Manager, Peterson Puritan Site Cc: Peterson Puritan Site File Date: April 11, 2012 RE: Sediment COC Refinement and PRG Development, Peterson Puritan OU 2 This memorandum provides backup information to support developing sediment Preliminary Remediation Goals (PRGs) for the ponds at the Peterson Puritan OU-2 site. As presented in AECOM’s Ecological Risk Summary Technical Memorandum (August 12, 2010), initial evaluation of the sediment chemistry and toxicity data resulted in selecting primary risk drivers for the site-related water bodies. Refinement of these chemicals of concern (COCs) is performed in this memorandum to further clarify those COCs which should be used as a basis for cleanup. While toxicity testing was not performed in each water body, this memorandum reviews available site toxicity data presented in the BERA (USEPA, 2009, Revision of Arcadis, 2008) to develop appropriate site-specific PRGs, applicable to the primary COCs, for use in the Record of Decision (ROD).

COC Refinement In the Ecological Risk Summary memorandum prepared for EPA (AECOM, 2010), a conservative interpretation was presented relative to the risk characterization. In any areas where elevated risks were indicated by one or more lines of evidence and the level of risk or extent of area affected was uncertain due to limited data, risk was concluded to be present and it was recommended that these risks be considered in the FS. In general, if the magnitude of the risk in the BERA was assessed high (severe) based on available data (See BERA Executive Summary Tables ES 1b to ES-1j) and comparison of residual risk (RR) using the interpretive risk matrix utilized in the BERA, the risk was identified as potentially actionable and was recommended to be further evaluated in the FS. In addition, if more than one line of evidence indicated potential risk to receptors, it was recommended for further consideration in the FS. This process resulted in the identification of a preliminary list of "Primary COCs" in Table 2 of the Ecological Risk Summary memorandum. The selection of the primary COCs was based on looking at the BERA chemistry data RR evaluation presented in Tables 7- 6(c, f, g, i & j). In cases where the toxicity tests concluded risk to benthic invertebrates, and/or surface water also indicated elevated concentrations of the same COCs, these locations were selected as potentially significant risk to receptors and recommended for further evaluation. This process took into consideration first the presence of contaminants in areas of documented risk (based on toxicity testing, if available), the association with toxicity, or in the locations without toxicity tests, elevated surface water concentrations of the COCs. Because the selection of COCs was based on RR, contaminants at or near levels observed in reference locations were eliminated in order to identify COCs as risk drivers that were likely site-related. Contaminants at this step were also eliminated if they were determined not likely to be site-related (e.g., acetone). Further refinement of the COCs, is performed to below, prior to the development of ecological PRGs.

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Further review of the BERA chemistry and toxicity data was performed to confirm/refine the list of COCs to be used as a basis for cleanup. Using the same BERA data (sediment chemistry for the ponds and the toxicity testing data set), a consistent method was applied for COC selection in the ponds (A, D, E, I, and N) which showed potential risk in sediment (see Attachment A for tables showing evaluation):

Using the BERA “chemistry” tables showing calculated hazard quotients and residual risks for benthic invertebrates (Tables 7-6c, f, g, i, and j), each analyte was placed into a “risk scenario” category, as defined in the BERA interpretive risk matrix.

Any analytes in risk scenarios 1, 2, or 3 were removed from further evaluation, as adverse effects due to site contributions of that contaminant are considered less likely than contributions from analytes in higher risk scenarios. Analytes in risk scenarios 4, 5, or 6 were evaluated further with respect to toxicity and/or relationship to site waste.

Using the BERA “toxicity” tables showing triad sediment chemistry and toxicity results (Tables 7-9b and c), chemistry data were compared to effects criteria to generate a Hazard Quotient (HQ) for each analyte, both in the site and reference ponds, using the highest site concentration and lowest reference concentration for ponds with multiple samples. For any site HQs greater than 1, the reference HQ was subtracted from the site HQ to generate a RR comparable to that on the “chemistry” tables. Analytes with a “toxicity” RR greater than 1 were evaluated further with respect to the “chemistry” results and/or relationship to site waste.

Pond A (Unnamed Island) Evaluation In Table A-1, the only analytes with a risk scenario greater than or equal to 4 included acetone, heptachlor epoxide, and cadmium. There are multiple PAHs and metals with risk scenarios equal to 3, but in attempting to limit the list of COCs to the primary risk drivers (as well as understanding that most of these contaminants are co-located since the number of samples is limited), they have been removed from this evaluation. In Table A-2, the only analyte with a toxicity RR greater than 1 is cadmium. Information from both tables was then evaluated together to develop pond-specific primary risk-drivers:

Acetone - Volatile contaminants are generally considered having low toxicity. Acetone is a known laboratory and preservative contaminant and is not considered site-related. Furthermore, toxicity RR was less than 1. Not a COC.

Heptachlor epoxide is not considered site-related and only had one detection out of 12 samples. Not a COC.

Cadmium appears to be related to site waste and is the only analyte with a toxicity RR greater than 1. COC.

Pond D (Unnamed Island) Evaluation In Table A-3, the analytes with a risk scenario greater than or equal to 4 included the PAHs anthracene, benzo(a)pyrene, chrysene, fluoranthene, phenanthrene, and pyrene (the most significant risk driver), and the metal cadmium. Similar to Pond A, there are additional/similar metals with risk scenarios equal to 3, but they have been removed from this evaluation. In Table A-4, the only analytes with a toxicity RR greater than 1 are the PAHs listed above, as well as benzo(k)fluoranthene and, while not included in the original BERA evaluation, Total PAHs. Information from both tables was then evaluated together to develop pond-specific primary risk-drivers:

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PAHs – Pyrene was previously listed in the Ecological Risk Summary memorandum as the primary risk driver (as evidenced by the highest residual risk in both Tables A-3 and A-4). However, multiple PAHs appear to be potential risk drivers in this pond. Therefore, Total PAHs should be considered a COC.

Cadmium appears to be related to site waste. COC. Pond E (Unnamed Island) Evaluation In Table A-5, the analytes with a risk scenario greater than or equal to 4 included acetone, carbon disulfide, cadmium, chromium, copper, lead, and zinc, with lead being the most significant risk driver. Similar to Pond A, there are additional PAHs with risk scenarios equal to 3, but they have been removed from this evaluation. There were no toxicity samples collected in this pond. Information from the single table was then evaluated to develop pond-specific primary risk-drivers:

Acetone - Volatile contaminants are generally considered having low toxicity. Acetone is a known laboratory and preservative contaminant and is not considered site-related. Not a COC.

Carbon disulfide - Volatile contaminants are generally considered having low toxicity and carbon disulfide is not considered site-related. Not a COC.

Cadmium, chromium, copper, lead, and zinc all appear to be related to site waste and are in the highest risk scenario. COCs.

Pond I (Next to Nunes Parcel) Evaluation In Table A-6, the analytes with a risk scenario greater than or equal to 4 included acetone, the PAHs benzo(a)pyrene, benzo(g,h,i)perylene, chrysene, fluoranthene, and pyrene, and the metals cadmium, chromium, copper, and silver. Similar to the Unnamed Island Ponds, there are additional PAHs and metals with risk scenarios equal to 3, but they have been removed from this evaluation. In Table A-7, the only analytes with a toxicity RR greater than 1 are the PAHs benzo(g,h,i)perylene, chrysene, fluoranthene, phenanthrene, and pyrene. Information from both tables was then evaluated together to develop pond-specific primary risk-drivers:

Acetone - Volatile contaminants are generally considered having low toxicity. Acetone is a known laboratory and preservative contaminant and is not considered site-related. Furthermore, toxicity RR was not greater than 1. Not a COC.

PAHs – Looking at both tables, multiple PAHs appear to be potential risk drivers in this pond. Therefore, Total PAHs should be considered a COC.

Based on a review of soil data in the area, cadmium, chromium, and copper appear to be related to site waste and all have evidence of elevated toxicity. COCs.

Silver in Pond I is not clearly site-related and does not have evidence of elevated toxicity. Not a COC.

Pond N (Drainage Ditch) Evaluation In Table A-8, the only analyte with a risk scenario greater than or equal to 4 was cadmium. There were a wide variety of additional analytes with risk scenarios equal to 3, including 4,4’-DDD and chromium which were noted in the Ecological Risk Summary memorandum as primary COCs, but they have been removed from this evaluation. There were no toxicity samples collected in this pond.

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Information from the single table was then evaluated to develop pond-specific primary risk-drivers:

Cadmium appears to be related to site waste. COC. Summary of COC Refinement Table 1 presents the refined list of COCs for the site ponds. All three ponds on the Unnamed Island (Ponds A, D, and E) are in proximity to both the waste and each other. While the primary COCs noted above for those ponds were not exactly the same, the evaluations note that similar analytes in each pond were just out of the range for further evaluation. For these reasons, the COCs for those ponds have been combined. Sediment PRGs Review of the toxicity testing results shows varied results which are not conducive to developing numeric goals based on a comparison of lowest and no observed effects in site samples. With the limited amount of data available, the reference sample with the highest/best survival (T05BL-004) should be used to define numeric cleanup goals. These concentrations are presented in Table 2 and presented by area/water body in Table 3.

TABLE 1. SUMMARY OF SEDIMENT ECOLOGICAL COCs BY EXPOSURE AREA

Area Media Primary COCs

Ponds on the Unnamed IslandPonds A, D, E Sediment Cd, Cr, Cu, Pb, Zn, Total PAHs,

Ponds Adjacent to the Blackstone RiverPond I Sediment Cd, Cr, Cu, Total PAHs

Pond N Sediment Cd

Notes

COC - Contaminant of Concern

Cd - Cadmium

Pb - Lead

Cu - Copper

PAHs - Polycyclic aromatic hydrocarbons

Cr - Chromium

Page 1 of 1 Sediment PRG Tables-031912.xlsx [Table 1 - COCs]

TABLE 2. ECOLOGICAL PRGs FOR SEDIMENTPETERSON PURITAN SITE - OPERABLE UNIT 2, CUMBERLAND AND LINCOLN, RI

DRAFTPRG

COC TO5BL-004Ref Pond Basis

PAHs (mg/kg)Total PAHs 18 Reference - No Effects

Metals (mg/kg)Cadmium 9.8 Reference - No EffectsChromium 120 Reference - No EffectsCopper 160 Reference - No EffectsLead 300 Reference - No EffectsZinc 490 Reference - No Effects

Notes

Concentrations taken from Table 7-9c of BERA. Page 24 of BERA defines the samples used as reference for pond sediment.

PRG - Preliminary Remediation Goal

COC - Contaminant of Concern


Page 1 of 1 Sediment PRG Tables-041112.xlsx [Table 2 - PRGs]

TABLE 3. ECOLOGICAL PRGs FOR SEDIMENT BY AREADRAFT

PRGArea Contaminant (mg/kg) Basis

Ponds on the Unnamed IslandPonds A, D, and E Cadmium (Cd) 9.8 Reference(1) - No Effects

Chromium (Cr) 120 Reference - No EffectsCopper (Cu) 160 Reference - No EffectsLead (Pb) 300 Reference - No EffectsZinc (Zn) 490 Reference - No Effects

Total PAHs 18 Reference - No Effects

Ponds Adjacent to the Blackstone RiverPond I Cadmium (Cd) 9.8 Reference - No Effects

Chromium (Cr) 120 Reference - No EffectsCopper (Cu) 160 Reference - No Effects

Total PAHs 18 Reference - No Effects

Pond N Cadmium (Cd) 9.8 Reference - No Effects

Notes

(1) Sample TO5BL-004

PRG - Preliminary Remediation Goal


Page 1 of 1 Sediment PRG Tables-041112.xlsx [Sediment PRGs by Area]

ATTACHMENT A

Table A-1 - Pond A Chemistry Data Evaluation

Data from BERA Table 7-6c March 2012 EvaluationNo Effect EffectSediment Sediment No Effect HQ Effect HQ No Effect RR Effect RR

COPECs (mg/kg dry wt) FOD RME CTE Benchmark Benchmark RME CTE RME CTE RME CTE RME CTE Scenario CommentVOCs1,1,1-Trichloroethane 0/12 2.30E-02 7.87E-03 0.17 2.2 0.1 0.05 0.01 0.004 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 31,1,2,2-Tetrachloroethane 0/12 2.30E-02 7.87E-03 0.94 12.2 0.02 0.008 0.002 0.0006 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 31,1-Dichloroethene 0/12 2.30E-02 7.87E-03 0.031 0.4 0.7 0.3 0.06 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Butanone 10/12 2.66E-01 9.18E-02 0.27 3.5 0.99 0.3 0.08 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Hexanone 0/12 2.30E-02 7.87E-03 0.022 0.29 1 0.4 0.08 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34-Methyl-2-pentanone 0/12 2.30E-02 7.87E-03 0.033 0.43 0.7 0.2 0.05 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acetone 8/12 5.16E-01 2.54E-01 0.0087 0.11 59 29 5 2 49 23 4 2 6 Out - associated with preservation/lab analysisCarbon disulfide 6/12 6.56E-03 6.07E-03 0.00085 0.011 8 7 0.6 0.5 2 2 <1 <1 3 Out - Scenario 1, 2, or 3Chloromethane 0/12 2.30E-02 7.87E-03 -- -- -- -- -- -- -- -- -- -- NAcis-1,2-Dichloroethene 0/12 2.30E-02 7.87E-03 -- -- -- -- -- -- -- -- -- -- NAcis-1,3-Dichloropropene 0/12 2.30E-02 7.87E-03 -- -- -- -- -- -- -- -- -- -- NAIsopropylbenzene 0/12 2.30E-02 7.87E-03 -- -- -- -- -- -- -- -- -- -- NAMethyl acetate 1/12 3.80E-02 8.62E-03 -- -- -- -- -- -- -- -- -- -- NAMethylene chloride 2/12 6.10E-02 1.19E-02 0.37 4.8 0.2 0.03 0.01 0.002 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Styrene 1/12 2.30E-02 7.82E-03 -- -- -- -- -- -- -- -- -- -- NATetrachloroethene 0/12 2.30E-02 7.87E-03 0.41 5.3 0.06 0.02 0.004 0.001 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3trans-1,3-Dichloropropene 0/12 2.30E-02 7.87E-03 -- -- -- -- -- -- -- -- -- -- NATrichlorofluoromethane 2/12 2.30E-02 7.29E-03 -- -- -- -- -- -- -- -- -- -- NAXylene (total) 0/12 2.30E-02 8.34E-03 0.025 0.33 0.9 0.3 0.07 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3SVOCs1,1'-Biphenyl 1/12 3.30E-01 1.95E-01 -- -- -- -- -- -- -- -- -- -- NA2-Methylnaphthalene 8/12 1.96E-01 1.57E-01 0.33 4.3 0.6 0.5 0.05 0.04 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Methylphenol 0/12 3.30E-01 1.95E-01 0.012 0.16 28 16 2 1 8 6 <1 <1 3 Out - Scenario 1, 2, or 34-Bromophenyl-phenylether 0/12 3.30E-01 2.05E-01 1.3 16.9 0.3 0.2 0.02 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34-Chloroaniline 0/12 3.30E-01 2.05E-01 -- -- -- -- -- -- -- -- -- -- NA4-Methylphenol 1/12 3.30E-01 1.94E-01 -- -- -- -- -- -- -- -- -- -- NA4-Nitroaniline 0/12 8.50E-01 4.94E-01 -- -- -- -- -- -- -- -- -- -- NAAcenaphthene 9/12 1.11E-01 1.19E-01 0.62 8.1 0.2 0.2 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acenaphthylene 10/12 2.91E-01 2.08E-01 0.33 4.3 0.9 0.6 0.07 0.05 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acetophenone 1/12 3.30E-01 1.95E-01 -- -- -- -- -- -- -- -- -- -- NAAnthracene 11/12 5.55E-01 3.74E-01 0.057 0.85 10 7 0.7 0.4 2 <1 <1 <1 2 Out - Scenario 1, 2, or 3Benzaldehyde 6/12 5.51E-01 3.46E-01 -- -- -- -- -- -- -- -- -- -- NABenzo(a)pyrene 11/12 1.84E+00 1.30E+00 0.15 1.5 12 9 1 0.9 3 2 <1 <1 3 Out - Scenario 1, 2, or 3Benzo(b)fluoranthene 10/11 2.30E+00 1.55E+00 -- -- -- -- -- -- -- -- -- -- NABenzo(g,h,i)perylene 11/12 9.38E-01 6.51E-01 0.17 0.32 6 4 3 2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Benzo(k)fluoranthene 11/12 1.00E+00 6.87E-01 -- -- -- -- -- -- -- -- -- -- NAbis(2-Ethylhexyl)phthalate 12/12 3.72E+00 1.58E+00 890 11570 0.004 0.002 0.0003 0.0001 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Carbazole 7/12 1.98E-01 1.69E-01 -- -- -- -- -- -- -- -- -- -- NAChrysene 11/12 1.90E+00 1.33E+00 0.17 1.3 11 8 1 1 3 2 <1 <1 3 Out - Scenario 1, 2, or 3Cyclohexane 0/12 2.30E-02 7.87E-03 -- -- -- -- -- -- -- -- -- -- NADibenzofuran 4/12 3.15E-01 1.54E-01 2 26 0.2 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Fluoranthene 11/12 3.14E+00 2.22E+00 0.42 2.2 7 5 1 1 2 1 <1 <1 3 Out - Scenario 1, 2, or 3Fluorene 9/12 1.84E-01 1.58E-01 0.077 0.54 2 2 0.3 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Hexachlorobenzene 0/12 3.30E-01 1.93E-01 0.02 0.26 17 10 1 0.7 5 4 <1 <1 3 Out - Scenario 1, 2, or 3Hexachlorobutadiene 0/12 3.30E-01 2.05E-01 -- -- -- -- -- -- -- -- -- -- NAIndeno(1,2,3-cd)pyrene 11/12 1.41E+00 6.93E-01 0.2 2.6 7 3 0.5 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Isophorone 0/12 3.30E-01 2.05E-01 -- -- -- -- -- -- -- -- -- -- NANaphthalene 9/12 1.87E-01 1.51E-01 0.18 0.56 1 0.9 0.3 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3N-Nitrosodiphenylamine 0/12 3.30E-01 2.05E-01 -- -- -- -- -- -- -- -- -- -- NA

Page 1 of 2 Pond Sediment Evaluation-031912.xlsx [Pond A Chemistry]

Table A-1 - Pond A Chemistry Data Evaluation

Data from BERA Table 7-6c March 2012 EvaluationNo Effect EffectSediment Sediment No Effect HQ Effect HQ No Effect RR Effect RR

COPECs (mg/kg dry wt) FOD RME CTE Benchmark Benchmark RME CTE RME CTE RME CTE RME CTE Scenario CommentPentachlorophenol 0/11 1.50E+00 6.61E-01 -- -- -- -- -- -- -- -- -- -- NAPhenanthrene 11/12 1.51E+00 1.05E+00 0.2 1.2 7 5 1 1 1 <1 <1 <1 2 Out - Scenario 1, 2, or 3Phenol 3/12 3.30E-01 1.99E-01 -- -- -- -- -- -- -- -- -- -- NAPyrene 11/12 2.58E+00 1.85E+00 0.2 1.52 13 9 2 1 2 1 <1 <1 3 Out - Scenario 1, 2, or 3Pesticides/PCBs4,4'-DDD 6/10 9.86E-03 6.01E-03 0.0049 0.028 2 1 0.4 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34,4'-DDE 6/8 1.64E-02 9.64E-03 0.0032 0.031 5 3 0.5 0.3 2 2 <1 <1 3 Out - Scenario 1, 2, or 34,4'-DDT 2/8 4.05E-03 1.09E-03 0.0042 0.063 1 0.3 0.1 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3alpha-Chlordane 6/10 2.19E-02 9.26E-03 0.0032 0.018 7 3 1 0.5 6 2 1 <1 3 Out - Scenario 1, 2, or 3Aroclor-1016 0/12 1.70E-02 6.16E-03 0.06 0.7 0.3 0.1 0.03 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1221 0/12 1.70E-02 9.83E-03 0.06 0.7 0.3 0.2 0.03 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1232 0/12 1.70E-02 6.16E-03 0.06 0.7 0.3 0.1 0.03 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1242 0/12 1.70E-02 6.16E-03 0.06 0.7 0.3 0.1 0.03 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1248 0/12 1.70E-02 6.16E-03 0.06 0.7 0.3 0.1 0.03 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1254 4/12 6.50E-01 8.67E-02 0.06 0.7 11 1 1 0.1 3 <1 <1 <1 2 Out - Scenario 1, 2, or 3Aroclor-1260 6/11 3.02E-01 1.54E-01 0.06 0.7 5 3 0.4 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Dieldrin 4/11 2.10E-02 4.28E-03 0.0019 0.062 11 2 0.3 0.07 8 <1 <1 <1 2 Out - Scenario 1, 2, or 3Endosulfan I 0/11 3.35E-04 2.36E-04 0.0029 0.073 0.1 0.1 0.005 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endosulfan II 0/11 6.50E-04 4.10E-04 0.0055 0.14 0.1 0.07 0.005 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endosulfan Sulfate 3/9 1.00E-02 2.28E-03 -- -- -- -- -- -- -- -- -- -- NAEndrin 1/12 8.60E-03 1.09E-03 0.002 0.21 4 0.5 0.04 0.005 4 <1 <1 <1 2 Out - Scenario 1, 2, or 3Endrin Aldehyde 3/9 5.80E-03 1.33E-03 -- -- -- -- -- -- -- -- -- -- NAEndrin Ketone 2/9 2.10E-03 6.16E-04 -- -- -- -- -- -- -- -- -- -- NAGamma-Chlordane 4/10 3.50E-02 3.29E-03 -- -- -- -- -- -- -- -- -- -- NAHeptachlor Epoxide 1/12 2.70E-02 2.47E-03 0.0025 0.016 11 1 2 0.2 11 <1 2 <1 4 Out - One detection, not considered site-relatedMethoxychlor 3/11 1.00E-02 3.31E-03 0.019 0.48 0.5 0.2 0.02 0.007 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Total PCBs 8/12 6.00E-01 3.75E-01 0.06 0.68 10 6 0.9 0.6 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Toxaphene 0/12 4.20E-02 2.47E-02 0.028 0.7 2 1 0.06 0.04 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3MetalsAluminum 12/12 1.02E+04 7.44E+03 -- -- -- -- -- -- -- -- -- -- NAAntimony 7/12 2.01E+00 1.18E+00 12 60 0.2 0.1 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Arsenic 11/12 1.68E+01 1.21E+01 9.8 33 2 1 1 0.4 1 <1 <1 <1 2 Out - Scenario 1, 2, or 3Barium 9/12 1.24E+02 8.33E+01 -- -- -- -- -- -- -- -- -- -- NABeryllium 8/12 9.26E-01 6.50E-01 -- -- -- -- -- -- -- -- -- -- NACadmium 12/12 1.82E+01 8.41E+00 1 5 18 8 4 2 11 5 2 <1 5 Potential COC - Site-relatedChromium 12/12 1.48E+02 1.02E+02 43 111 3 2 1 0.9 2 1 <1 <1 3 Out - Scenario 1, 2, or 3Cobalt 4/12 1.60E+01 8.43E+00 -- -- -- -- -- -- -- -- -- -- NACopper 11/12 1.83E+02 1.23E+02 32 149 6 4 1 0.8 2 2 <1 <1 3 Out - Scenario 1, 2, or 3Cyanide 6/10 2.38E+00 1.05E+00 -- -- -- -- -- -- -- -- -- -- NAIron 12/12 2.17E+04 1.59E+04 20,000 40,000 1 0.8 0.5 0.4 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Lead 12/12 1.76E+02 1.22E+02 36 128 5 3 1 0.95 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Manganese 12/12 4.88E+02 2.94E+02 460 5500 1 0.6 0.09 0.05 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Mercury 11/12 6.29E-01 4.41E-01 0.18 1.06 3 2 0.6 0.4 2 1 <1 <1 3 Out - Scenario 1, 2, or 3Nickel 7/12 4.13E+01 2.41E+01 23 48.6 2 1 0.8 0.5 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Selenium 10/12 2.58E+00 1.77E+00 -- -- -- -- -- -- -- -- -- -- NASilver 12/12 1.12E+01 6.05E+00 2 10 6 3 1.1 0.6 4 2 <1 <1 3 Out - Scenario 1, 2, or 3Thallium 3/12 8.30E-01 2.68E-01 -- -- -- -- -- -- -- -- -- -- NAVanadium 9/12 2.40E+01 1.69E+01 -- -- -- -- -- -- -- -- -- -- NAZinc 12/12 6.92E+02 3.66E+02 120 459 6 3 2 0.8 3 2 <1 <1 3 Out - Scenario 1, 2, or 3

Page 2 of 2 Pond Sediment Evaluation-031912.xlsx [Pond A Chemistry]

Table A-2 - Pond A Toxicity Data Evaluation

Data from BERA Table 7-9c March 2012 EvaluationPond

Site Background Note that Highest HQ for site data is max conc divided bySample Name: T05PA-001 T05PA-003 T05BL-003 T05BL-004 Effect Criteria.

Sample Depth (Feet): 0 - 0.5 0 - 0.5 0 - 0.5 0 - 0.5 Lowest HQ for Bkgd data is min conc divided by EffectDate Collected: 6/21/2005 6/21/2005 6/23/2005 6/23/2005 Criteria.

Location ID: T05PA-001 T05PA-003 T05BL-003 T05BL-004 RR is Site HQ minus Bkgd HQ

Lab controlSpecies Test Result Units TOXICITYChironomus dilutus Survival 83.75 % 76.25 71.25 86.25 93.75Chironomus dilutus Growth 1.79 mg/larvae 1.68 1.47 1.39 1.56Hyalella azteca Survival 91.25 % 8.75 1.25 51.25 88.75Hyalella azteca Growth 0.597 mg/amphipod 0.3 0.08 0.237 0.29

No Effect EffectConstituent Criteria Criteria Units SEDIMENT CHEMISTRY

Highest Site HQ Lowest Bkgd HQ RR CommentVOC2-Butanone 0.27 3.51 mg/kg dry wt 0.05 0.067 0.038 J 0.029 JAcetone 0.0087 0.1131 mg/kg dry wt 0.12 J 0.18 J 1.6 0.13 JEB 0.15 JEB 1.1 0.4 Out - RR<=1Carbon disulfide 0.00085 0.01105 mg/kg dry wt 0.0032 0.0046 0.013 J 0.0057 JEthylbenzene 3.6 46.8 mg/kg dry wt 0.0018 J 0.001 J 0.0053 J 0.0062 UJMethyl tert butyl ether - - mg/kg dry wt 0.0024 U 0.0035 U 0.0041 J 0.0062 UJStyrene - - mg/kg dry wt 0.00061 J 0.0035 U 0.002 J 0.0062 UJToluene 0.67 8.71 mg/kg dry wt 0.0024 U 0.0035 U 0.0068 UJ 0.0062 UJXylene (Total) 0.025 0.325 mg/kg dry wt 0.0071 U 0.01 U 0.02 UJ 0.019 UJSVOC1,1'-Biphenyl - - mg/kg dry wt 0.15 U 0.17 U 0.19 U 0.17 U2-Methylnaphthalene 0.33 4.29 mg/kg dry wt 0.24 0.4 0.36 0.432-Methylphenol 0.012 0.156 mg/kg dry wt 0.037 U 0.042 U 0.046 U 0.043 UAcenaphthene 0.62 8.06 mg/kg dry wt 0.092 0.15 0.097 0.084Acenaphthylene 0.33 4.29 mg/kg dry wt 0.22 0.43 0.31 0.47Anthracene 0.0572 0.845 mg/kg dry wt 0.42 0.68 0.44 0.46Benzaldehyde - - mg/kg dry wt 0.22 J 0.3 J 0.41 J 0.17 UJBenzo(a)pyrene 0.15 1.45 mg/kg dry wt 1.2 2.3 1.6 1.7 1.5 1.0 0.6 Out - RR<=1Benzo(b)fluoranthene - - mg/kg dry wt 1.1 2.1 2.3 1.8Benzo(g,h,i)perylene 0.17 0.32 mg/kg dry wt 0.82 1.6 5 1.8 1.3 4.1 0.9 Out - RR<=1Benzo(k)fluoranthene - - mg/kg dry wt 0.95 1.9 1.8 1.6Benzo[a]anthracene 0.11 1.05 mg/kg dry wt 1 2 1.9 1.3 1.3 1.2 0.7 Out - RR<=1bis(2-Ethylhexyl)phthalate 890 11,570 mg/kg dry wt 1.2 3.2 5.9 1.9Carbazole - - mg/kg dry wt 0.15 U 0.2 0.22 0.17 UChrysene 0.17 1.29 mg/kg dry wt 1.2 2.2 1.7 1.8 1.5 1.2 0.5 Out - RR<=1Dibenz[a,h]anthracene 0.033 0.429 mg/kg dry wt 0.25 0.49 1.1 0.5 0.4 0.9 0.2 Out - RR<=1Dibenzofuran 2 26 mg/kg dry wt 0.15 U 0.17 U 0.19 U 0.17 UFluoranthene 0.42 2.23 mg/kg dry wt 1.9 3.6 1.6 2.6 2.4 1.1 0.5 Out - RR<=1Fluorene 0.077 0.536 mg/kg dry wt 0.15 0.27 0.22 0.18Indeno(1,2,3-cd)pyrene 0.2 2.6 mg/kg dry wt 0.73 1.4 1.5 1.2Naphthalene 0.18 0.561 mg/kg dry wt 0.27 0.36 0.27 0.35

Page 1 of 3 Pond Sediment Evaluation-031912.xlsx [Pond A Tox]








Highest Site HQ Lowest Bkgd HQ RR CommentPhenanthrene 0.2 1.17 mg/kg dry wt 0.96 J 1.8 1.5 0.97 0.84Phenol - - mg/kg dry wt 0.082 0.14 0.18 0.16Pyrene 0.2 1.52 mg/kg dry wt 1.8 3.5 2.3 2.2 2.2 1.4 0.9 Out - RR<=1Total PAHs (1) 1.6 22.8 mg/kg dry wt 13.3 J 25.2 1.1 20.2 18 0.8 0.3 Out - RR<=1Pesticides4,4'-DDD 0.00488 0.028 mg/kg dry wt 0.013 0.015 0.018 0.0174,4'-DDE 0.00316 0.0313 mg/kg dry wt 0.0097 J 0.019 J R 0.016 Jalpha-Chlordane 0.0032 0.0176 mg/kg dry wt 0.0041 J 0.0041 0.0055 0.0034Delta-BHC 0.12 0.01 mg/kg dry wt 0.00059 U 0.00097 J 0.00076 U 0.00068 UDieldrin 0.0019 0.0618 mg/kg dry wt 0.004 J 0.0042 0.00076 U 0.0052 JEndosulfan Sulfate - - mg/kg dry wt 0.00059 UJ 0.00067 U 0.00076 U 0.013 JEndrin Ketone - - mg/kg dry wt 0.00059 U 0.00067 U 0.00076 U 0.00068 UGamma-Chlordane - - mg/kg dry wt 0.0031 0.0042 0.0065 0.0036PCBsAroclor-1254 0.0598 0.676 mg/kg dry wt 0.21 EB 0.42 EB 1.4 JEB 1.1 JEB 1.6 -2 Out - RR<=1Aroclor-1260 0.0598 0.676 mg/kg dry wt 0.42 J 0.55 0.57 J 0.46Total PCBs 0.0598 0.676 mg/kg dry wt 0.63 J 0.97 1.4 1.97 J 1.56 J 2.3 -0.9 Out - RR<=1Metals and CyanideAluminum - - mg/kg dry wt 8,900 12,000 12,000 12,000Antimony 12 60 mg/kg dry wt 0.27 J 0.73 J 0.52 J 0.47 JArsenic 9.79 33 mg/kg dry wt 12 18 10 8.1Barium - - mg/kg dry wt 80 150 82 79Beryllium - - mg/kg dry wt 0.63 0.91 0.88 0.73Cadmium 1 4.98 mg/kg dry wt 12 25 5.0 9.9 9.8 2.0 3 Potential COC - RR>1Calcium - - mg/kg dry wt 1,400 J 2,000 J 3,300 J 3,100 JChromium 43.4 111 mg/kg dry wt 98 210 1.9 110 120 1.0 0.9 Out - RR<=1Cobalt - - mg/kg dry wt 9.1 14 12 11Copper 31.6 149 mg/kg dry wt 130 260 1.7 170 160 1.1 0.7 Out - RR<=1Iron 20,000 40,000 mg/kg dry wt 17,000 24,000 25,000 17,000Lead 36 128 mg/kg dry wt 120 240 1.9 450 300 2.3 -0.5 Out - RR<=1Magnesium - - mg/kg dry wt 2,900 3,600 4,100 2,900









Highest Site HQ Lowest Bkgd HQ RR CommentManganese 460 5,500 mg/kg dry wt 280 J 450 J 200 J 160 JMercury 0.18 1.06 mg/kg dry wt 0.31 0.67 0.54 0.47Nickel 23 48.6 mg/kg dry wt 33 54 1.1 52 46 0.9 0.2 Out - RR<=1Potassium - - mg/kg dry wt 1,200 1,300 1,500 1,100Selenium - - mg/kg dry wt 0.54 1 1.5 1.3Silver 2 10 mg/kg dry wt 1.4 3 1.7 2.1Sodium - - mg/kg dry wt 130 130 2,500 2,100Thallium - - mg/kg dry wt 0.15 0.25 0.4 0.26Vanadium - - mg/kg dry wt 21 27 31 24Zinc 120 459 mg/kg dry wt 400 J 950 J 2.1 680 J 490 J 1.1 1 Out - RR<=1(1) No effect/Effect criteria (TEC/PEC) were not in the original BERA


Table A-3 - Pond D Chemistry Data Evaluation

Data from BERA Table 7-6f March 2012 EvaluationNo Effect EffectSediment Sediment No Effect HQ Effect HQ No Effect RR Effect RR

COPECs (mg/kg dry wt) FOD RME CTE Benchmark Benchmark RME CTE RME CTE RME CTE RME CTE Scenario CommentVOCs1,1,1-Trichloroethane 0/4 1.30E-02 7.63E-03 0.17 2.2 0.1 0.04 0.01 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 31,1,2,2-Tetrachloroethane 0/4 1.30E-02 7.63E-03 0.94 12.2 0.01 0.008 0.001 0.0006 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 31,1-Dichloroethene 0/4 1.30E-02 7.63E-03 0.031 0.4 0.4 0.2 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Butanone 4/4 6.90E-02 4.96E-02 0.27 3.5 0.3 0.2 0.02 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Hexanone 0/4 1.30E-02 7.63E-03 0.022 0.29 0.6 0.3 0.05 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34-Methyl-2-pentanone 0/4 1.30E-02 7.63E-03 0.033 0.43 0.4 0.2 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acetone 4/4 2.00E-01 1.34E-01 0.0087 0.11 23 15 2 1 12 9 <1 <1 3 Out - Scenario 1, 2, or 3Carbon disulfide 3/4 7.00E-03 3.93E-03 0.00085 0.011 8 5 0.6 0.4 2 <1 <1 <1 2 Out - Scenario 1, 2, or 3Chloromethane 0/4 1.30E-02 7.63E-03 -- -- -- -- -- -- -- -- -- -- NAcis-1,2-Dichloroethene 0/4 1.30E-02 7.63E-03 -- -- -- -- -- -- -- -- -- -- NAcis-1,3-Dichloropropene 0/4 1.30E-02 7.63E-03 -- -- -- -- -- -- -- -- -- -- NAIsopropylbenzene 0/4 1.30E-02 7.63E-03 -- -- -- -- -- -- -- -- -- -- NAMethyl acetate 0/4 1.30E-02 7.63E-03 -- -- -- -- -- -- -- -- -- -- NAMethylene chloride 0/4 1.30E-02 8.38E-03 0.37 4.8 0.04 0.02 0.003 0.002 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Styrene 0/4 1.30E-02 7.63E-03 -- -- -- -- -- -- -- -- -- -- NATetrachloroethene 0/4 1.30E-02 7.63E-03 0.41 5.3 0.03 0.02 0.002 0.001 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3trans-1,3-Dichloropropene 0/4 1.30E-02 7.63E-03 -- -- -- -- -- -- -- -- -- -- NATrichlorofluoromethane 0/4 1.30E-02 7.63E-03 -- -- -- -- -- -- -- -- -- -- NAXylene (total) 1/4 1.30E-02 7.79E-03 0.025 0.33 0.5 0.3 0.04 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3SVOCs1,1'-Biphenyl 1/4 2.65E-01 1.89E-01 -- -- -- -- -- -- -- -- -- -- NA2-Methylnaphthalene 3/4 2.65E-01 1.44E-01 0.33 4.3 0.8 0.4 0.06 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Methylphenol 1/4 2.65E-01 1.73E-01 0.012 0.16 22 14 2 1 3 5 <1 <1 3 Out - Scenario 1, 2, or 34-Bromophenyl-phenylether 0/4 2.65E-01 1.84E-01 1.3 16.9 0.2 0.1 0.02 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34-Chloroaniline 0/4 2.65E-01 1.84E-01 -- -- -- -- -- -- -- -- -- -- NA4-Methylphenol 0/4 2.65E-01 1.84E-01 -- -- -- -- -- -- -- -- -- -- NA4-Nitroaniline 0/4 6.50E-01 4.38E-01 -- -- -- -- -- -- -- -- -- -- NAAcenaphthene 3/4 2.65E-01 1.29E-01 0.62 8.1 0.4 0.2 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acenaphthylene 4/4 2.50E-01 1.81E-01 0.33 4.3 0.8 0.5 0.06 0.04 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acetophenone 0/4 2.65E-01 1.84E-01 -- -- -- -- -- -- -- -- -- -- NAAnthracene 4/4 2.90E+00 7.10E-01 0.057 0.85 51 12 3 0.8 43 7 3 <1 5 Potential COCBenzaldehyde 3/4 2.40E-01 1.28E-01 -- -- -- -- -- -- -- -- -- -- NABenzo(a)pyrene 4/4 6.70E+00 2.04E+00 0.15 1.5 45 14 5 1 36 7 4 <1 5 Potential COCBenzo(b)fluoranthene 4/4 3.20E+00 1.98E+00 -- -- -- -- -- -- -- -- -- -- NABenzo(g,h,i)perylene 4/4 9.10E-01 6.43E-01 0.17 0.32 5 4 3 2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Benzo(k)fluoranthene 4/4 3.60E+00 1.11E+00 -- -- -- -- -- -- -- -- -- -- NAbis(2-Ethylhexyl)phthalate 3/4 2.20E+00 8.48E-01 890 11570 0.002 0.001 0.0002 0.0001 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Carbazole 4/4 1.80E-01 1.08E-01 -- -- -- -- -- -- -- -- -- -- NAChrysene 4/4 6.90E+00 2.18E+00 0.17 1.3 42 13 5 2 33 7 4 <1 5 Potential COCCyclohexane 0/4 1.30E-02 7.63E-03 -- -- -- -- -- -- -- -- -- -- NADibenzofuran 3/4 2.65E-01 1.11E-01 2 26 0.1 0.06 0.01 0.004 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Fluoranthene 4/4 1.00E+01 3.18E+00 0.42 2.2 24 8 4 1 18 4 3 <1 5 Potential COCFluorene 4/4 3.60E-01 1.25E-01 0.077 0.54 5 2 0.7 0.2 3 <1 <1 <1 2 Out - Scenario 1, 2, or 3Hexachlorobenzene 0/4 2.65E-01 1.72E-01 0.02 0.26 13 9 1 0.7 2 3 <1 <1 3 Out - Scenario 1, 2, or 3Hexachlorobutadiene 0/4 2.65E-01 1.84E-01 -- -- -- -- -- -- -- -- -- -- NAIndeno(1,2,3-cd)pyrene 4/4 8.00E-01 6.41E-01 0.2 2.6 4 3 0.3 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Isophorone 0/4 2.65E-01 1.84E-01 -- -- -- -- -- -- -- -- -- -- NANaphthalene 3/4 2.65E-01 1.64E-01 0.18 0.56 2 0.9 0.5 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3N-Nitrosodiphenylamine 0/4 2.65E-01 1.84E-01 -- -- -- -- -- -- -- -- -- -- NA

Page 1 of 2 Pond Sediment Evaluation-031912.xlsx [Pond D Chemistry]

Table A-3 - Pond D Chemistry Data Evaluation

Data from BERA Table 7-6f March 2012 EvaluationNo Effect EffectSediment Sediment No Effect HQ Effect HQ No Effect RR Effect RR

COPECs (mg/kg dry wt) FOD RME CTE Benchmark Benchmark RME CTE RME CTE RME CTE RME CTE Scenario CommentPentachlorophenol 0/4 6.50E-01 4.38E-01 -- -- -- -- -- -- -- -- -- -- NAPhenanthrene 4/4 4.80E+00 1.49E+00 0.2 1.2 24 7 4 1 17 3 3 <1 5 Potential COCPhenol 0/4 2.65E-01 1.84E-01 -- -- -- -- -- -- -- -- -- -- NAPyrene 4/4 1.30E+01 3.76E+00 0.2 1.52 67 19 9 2 55 11 7 1 5 Potential COCPesticides/PCBs4,4'-DDD 3/3 7.30E-03 4.70E-03 0.0049 0.028 1 1 0.3 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34,4'-DDE 3/3 5.10E-03 4.72E-03 0.0032 0.031 2 1 0.2 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34,4'-DDT 0/3 5.50E-04 4.42E-04 0.0042 0.063 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3alpha-Chlordane 3/3 1.50E-03 1.08E-03 0.0032 0.018 0.5 0.3 0.1 0.1 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1016 0/4 5.50E-03 4.55E-03 0.06 0.7 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1221 0/4 1.10E-02 8.16E-03 0.06 0.7 0.2 0.1 0.02 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1232 0/4 5.50E-03 4.54E-03 0.06 0.7 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1242 0/4 5.50E-03 4.54E-03 0.06 0.7 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1248 0/4 5.50E-03 4.54E-03 0.06 0.7 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1254 0/4 5.50E-03 4.54E-03 0.06 0.7 0.1 0.1 0.01 0 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1260 4/4 2.50E-01 1.43E-01 0.06 0.7 4 2 0.4 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Dieldrin 1/3 2.20E-03 9.70E-04 0.0019 0.062 1 0.5 0.04 0 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endosulfan I 0/4 4.20E-04 2.81E-04 0.0029 0.073 0.1 0.1 0.006 0.004 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endosulfan II 0/4 5.50E-04 4.54E-04 0.0055 0.14 0.1 0.1 0.004 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endosulfan Sulfate 1/4 8.00E-03 2.33E-03 -- -- -- -- -- -- -- -- -- -- NAEndrin 0/4 5.50E-04 4.54E-04 0.002 0.21 0.2 0.2 0.003 0.002 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endrin Aldehyde 1/2 2.10E-03 1.89E-03 -- -- -- -- -- -- -- -- -- -- NAEndrin Ketone 1/1 9.10E-03 8.65E-03 -- -- -- -- -- -- -- -- -- -- NAGamma-Chlordane 1/2 5.60E-03 3.63E-03 -- -- -- -- -- -- -- -- -- -- NAHeptachlor Epoxide 0/4 4.20E-04 2.81E-04 0.0025 0.016 0.2 0.1 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Methoxychlor 0/4 2.75E-03 1.88E-03 0.019 0.48 0.1 0.1 0.01 0.004 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Total PCBs 4/4 2.50E-01 1.43E-01 0.06 0.68 4 2 0.4 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Toxaphene 0/4 5.00E-02 3.03E-02 0.028 0.7 2 1 0.07 0.04 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3MetalsAluminum 4/4 8.67E+03 6.40E+03 -- -- -- -- -- -- -- -- -- -- NAAntimony 4/4 2.00E+00 1.19E+00 12 60 0.2 0.1 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Arsenic 4/4 1.23E+01 7.66E+00 9.8 33 1 0.8 0.4 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Barium 4/4 1.19E+02 8.11E+01 -- -- -- -- -- -- -- -- -- -- NABeryllium 1/2 6.50E-01 5.16E-01 -- -- -- -- -- -- -- -- -- -- NACadmium 4/4 1.56E+01 9.23E+00 1 5 16 9 3 2 8 6 2 1 5 Potential COC - Site-relatedChromium 4/4 1.41E+02 9.93E+01 43 111 3 2 1 0.9 2 1 <1 <1 3 Out - Scenario 1, 2, or 3Cobalt 1/4 7.00E+00 5.90E+00 -- -- -- -- -- -- -- -- -- -- NACopper 4/4 1.79E+02 1.19E+02 32 149 6 4 1 0.8 2 2 <1 <1 3 Out - Scenario 1, 2, or 3Cyanide 1/3 7.20E-01 4.28E-01 -- -- -- -- -- -- -- -- -- -- NAIron 4/4 1.35E+04 1.04E+04 20,000 40,000 0.7 0.5 0.3 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Lead 4/4 1.96E+02 1.30E+02 36 128 5 4 2 1 <1 1 <1 <1 1 Out - Scenario 1, 2, or 3Manganese 4/4 2.97E+02 2.11E+02 460 5500 0.6 0.5 0.05 0.04 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Mercury 4/4 6.00E-01 3.94E-01 0.18 1.06 3 2 0.6 0.4 2 1 <1 <1 2 Out - Scenario 1, 2, or 3Nickel 4/4 4.67E+01 2.90E+01 23 48.6 2 1 1 0.6 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Selenium 3/4 2.00E+00 1.16E+00 -- -- -- -- -- -- -- -- -- -- NASilver 4/4 8.60E+00 4.22E+00 2 10 4 2 0.9 0.4 3 1 <1 <1 2 Out - Scenario 1, 2, or 3Thallium 1/4 2.80E-01 2.13E-01 -- -- -- -- -- -- -- -- -- -- NAVanadium 3/4 2.12E+01 1.45E+01 -- -- -- -- -- -- -- -- -- -- NAZinc 4/4 5.90E+02 3.89E+02 120 459 5 3 1.3 0.8 2 2 <1 <1 3 Out - Scenario 1, 2, or 3

Page 2 of 2 Pond Sediment Evaluation-031912.xlsx [Pond D Chemistry]

Table A-4 - Pond D Toxicity Data Evaluation


Site Background Note that Highest HQ for site data is max conc divided bySample Name: T05PD-002 BD062105 T05BL-003 T05BL-004 Effect Criteria.


Location ID: T05PD-002 T05PD-002 T05BL-003 T05BL-004 RR is Site HQ minus Bkgd HQ

Lab controlSpecies Test Result UnitsChironomus dilutus Survival 83.75 % 77.5 86.25 93.75Chironomus dilutus Growth 1.79 mg/larvae 1.81 1.39 1.56Hyalella azteca Survival 91.25 % 16.25 51.25 88.75Hyalella azteca Growth 0.597 mg/amphipod 0.528 0.237 0.29

No Effect EffectConstituent Criteria Criteria Units

Highest Site HQ Lowest Bkgd HQ RR CommentVOC2-Butanone 0.27 3.51 mg/kg dry wt 0.023 J 0.02 0.038 J 0.029 JAcetone 0.0087 0.1131 mg/kg dry wt 0.058 JEB 0.074 J 0.13 JEB 0.15 JEBCarbon disulfide 0.00085 0.01105 mg/kg dry wt 0.0016 J 0.0018 J 0.013 J 0.0057 JEthylbenzene 3.6 46.8 mg/kg dry wt 0.00069 J 0.00054 J 0.0053 J 0.0062 UJMethyl tert butyl ether - - mg/kg dry wt 0.002 U 0.0021 U 0.0041 J 0.0062 UJStyrene - - mg/kg dry wt 0.002 UJ 0.0021 U 0.002 J 0.0062 UJToluene 0.67 8.71 mg/kg dry wt 0.001 J 0.00088 J 0.0068 UJ 0.0062 UJXylene (Total) 0.025 0.325 mg/kg dry wt 0.0021 J 0.0012 J 0.02 UJ 0.019 UJSVOC1,1'-Biphenyl - - mg/kg dry wt 0.11 UJ 0.088 J 0.19 U 0.17 U2-Methylnaphthalene 0.33 4.29 mg/kg dry wt 0.077 J 0.25 J 0.36 0.432-Methylphenol 0.012 0.156 mg/kg dry wt 0.016 JEB 0.0021 UJ 0.046 U 0.043 UAcenaphthene 0.62 8.06 mg/kg dry wt 0.052 J 0.13 J 0.097 0.084Acenaphthylene 0.33 4.29 mg/kg dry wt 0.16 J 0.087 J 0.31 0.47Anthracene 0.0572 0.845 mg/kg dry wt 0.48 J 2.9 J 3.4 0.44 0.46 0.5 3 Potential COCBenzaldehyde - - mg/kg dry wt 0.082 J 0.078 J 0.41 J 0.17 UJBenzo(a)pyrene 0.15 1.45 mg/kg dry wt 1.2 J 6.7 J 4.6 1.7 1.5 1.0 4 Potential COCBenzo(b)fluoranthene - - mg/kg dry wt 0.84 J 3.2 J 2.3 1.8Benzo(g,h,i)perylene 0.17 0.32 mg/kg dry wt 0.81 J 0.91 J 2.8 1.8 1.3 4.1 -1 Out - RR<=1Benzo(k)fluoranthene - - mg/kg dry wt 0.89 J 3.6 J 1.8 1.6Benzo[a]anthracene 0.11 1.05 mg/kg dry wt 0.97 J 7.1 J 6.8 1.3 1.3 1.2 6 Potential COCbis(2-Ethylhexyl)phthalate 890 11,570 mg/kg dry wt 0.21 J 0.26 J 5.9 1.9Carbazole - - mg/kg dry wt 0.11 UJ 0.093 J 0.22 0.17 UChrysene 0.17 1.29 mg/kg dry wt 1.1 J 6.9 J 5.3 1.8 1.5 1.2 4 Potential COCDibenz[a,h]anthracene 0.033 0.429 mg/kg dry wt 0.24 J 0.92 J 2.1 0.5 0.4 0.9 1 Out - RR<=1Dibenzofuran 2 26 mg/kg dry wt 0.11 UJ 0.09 J 0.19 U 0.17 UFluoranthene 0.42 2.23 mg/kg dry wt 1.4 J 10 J 4.5 2.6 2.4 1.1 3 Potential COCFluorene 0.077 0.536 mg/kg dry wt 0.089 J 0.36 J 0.22 0.18Indeno(1,2,3-cd)pyrene 0.2 2.6 mg/kg dry wt 0.71 J 0.8 J 1.5 1.2Naphthalene 0.18 0.561 mg/kg dry wt 0.13 J 0.25 J 0.27 0.35

Page 1 of 3 Pond Sediment Evaluation-031912.xlsx [Pond D Tox








Highest Site HQ Lowest Bkgd HQ RR CommentPhenanthrene 0.2 1.17 mg/kg dry wt 0.75 J 4.8 J 4.1 0.97 0.84 0.7 3 Potential COCPhenol - - mg/kg dry wt 0.11 U 0.1 U 0.18 0.16Pyrene 0.2 1.52 mg/kg dry wt 1.7 J 13 J 8.6 2.2 2.2 1.4 7 Potential COCTotal PAHs (1) 1.6 22.8 mg/kg dry wt 11.6 J 61.9 J 2.7 20.2 18 0.8 2 Potential COCPesticides4,4'-DDD 0.00488 0.028 mg/kg dry wt 0.0073 0.0061 0.018 0.0174,4'-DDE 0.00316 0.0313 mg/kg dry wt 0.0048 0.0051 J R 0.016 Jalpha-Chlordane 0.0032 0.0176 mg/kg dry wt 0.0015 0.0015 0.0055 0.0034Delta-BHC 0.12 0.01 mg/kg dry wt 0.00082 U 0.00084 U 0.00076 U 0.00068 UDieldrin 0.0019 0.0618 mg/kg dry wt 0.0018 0.0022 0.00076 U 0.0052 JEndosulfan Sulfate - - mg/kg dry wt 0.00082 U 0.00084 U 0.00076 U 0.013 JEndrin Ketone - - mg/kg dry wt 0.0082 J 0.0091 J 0.00076 U 0.00068 UGamma-Chlordane - - mg/kg dry wt 0.0013 0.002 J 0.0065 0.0036PCBsAroclor-1254 0.0598 0.676 mg/kg dry wt 0.0082 U 0.0084 U 1.4 JEB 1.1 JEBAroclor-1260 0.0598 0.676 mg/kg dry wt 0.13 J 0.12 J 0.57 J 0.46Total PCBs 0.0598 0.676 mg/kg dry wt 0.13 J 0.12 J 1.97 J 1.56 JMetals and CyanideAluminum - - mg/kg dry wt 5,200 4,700 12,000 12,000Antimony 12 60 mg/kg dry wt 0.47 J 0.46 J 0.52 J 0.47 JArsenic 9.79 33 mg/kg dry wt 5.8 5.5 10 8.1Barium - - mg/kg dry wt 51 44 82 79Beryllium - - mg/kg dry wt 0.35 0.3 0.88 0.73Cadmium 1 4.98 mg/kg dry wt 4.6 4 9.9 9.8Calcium - - mg/kg dry wt 1,100 950 3,300 J 3,100 JChromium 43.4 111 mg/kg dry wt 86 70 110 120Cobalt - - mg/kg dry wt 4.8 4.4 12 11Copper 31.6 149 mg/kg dry wt 72 69 170 160Iron 20,000 40,000 mg/kg dry wt 8,200 7,300 25,000 17,000Lead 36 128 mg/kg dry wt 96 94 450 300Magnesium - - mg/kg dry wt 1,600 1,500 4,100 2,900









Highest Site HQ Lowest Bkgd HQ RR CommentManganese 460 5,500 mg/kg dry wt 140 120 200 J 160 JMercury 0.18 1.06 mg/kg dry wt 0.26 J 0.29 J 0.54 0.47Nickel 23 48.6 mg/kg dry wt 19 18 52 46Potassium - - mg/kg dry wt 480 420 1,500 1,100Selenium - - mg/kg dry wt 0.29 0.26 1.5 1.3Silver 2 10 mg/kg dry wt 0.44 0.49 1.7 2.1Sodium - - mg/kg dry wt 99 86 2,500 2,100Thallium - - mg/kg dry wt 0.1 0.087 0.4 0.26Vanadium - - mg/kg dry wt 12 9.9 31 24Zinc 120 459 mg/kg dry wt 220 200 680 J 490 J(1) No effect/Effect criteria (TEC/PEC) were not in the original BERA


Table A-5 - Pond E Chemistry Data Evaluation

Data from BERA Table 7-6g March 2012 EvaluationNo Effect EffectSediment Sediment No Effect HQ Effect HQ No Effect RR Effect RR

COPECs (mg/kg dry wt) FOD RME CTE Benchmark Benchmark RME CTE RME CTE RME CTE RME CTE Scenario CommentVOCs1,1,1-Trichloroethane 0/2 1.35E-02 1.25E-02 0.17 2.2 0.1 0.07 0.01 0.006 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 31,1,2,2-Tetrachloroethane 0/2 1.35E-02 1.25E-02 0.94 12.2 0.01 0.01 0.001 0.001 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 31,1-Dichloroethene 0/2 1.35E-02 1.25E-02 0.031 0.4 0.4 0.4 0.03 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Butanone 1/2 7.50E-01 3.82E-01 0.27 3.5 3 1 0.2 0.1 3 1 <1 <1 2 Out - Scenario 1, 2, or 32-Hexanone 0/2 1.35E-02 1.25E-02 0.022 0.29 0.6 0.6 0.05 0.04 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34-Methyl-2-pentanone 1/2 1.30E-01 7.18E-02 0.033 0.43 4 2 0.3 0.2 4 2 <1 <1 3 Out - Scenario 1, 2, or 3Acetone 1/2 2.30E+00 1.16E+00 0.0087 0.11 264 133 20 10 254 127 20 10 6 Out - associated with preservation/lab analysisCarbon disulfide 1/2 4.40E-02 2.88E-02 0.00085 0.011 52 34 4 3 46 29 4 2 6 Out - Low Toxicity for VOCs; not site-relatedChloromethane 0/2 1.35E-02 1.25E-02 -- -- -- -- -- -- -- -- -- -- NAcis-1,2-Dichloroethene 0/2 1.35E-02 1.25E-02 -- -- -- -- -- -- -- -- -- -- NAcis-1,3-Dichloropropene 0/2 1.35E-02 1.25E-02 -- -- -- -- -- -- -- -- -- -- NAIsopropylbenzene 0/2 1.35E-02 1.25E-02 -- -- -- -- -- -- -- -- -- -- NAMethyl acetate 0/2 1.35E-02 1.25E-02 -- -- -- -- -- -- -- -- -- -- NAMethylene chloride 0/2 4.35E-02 2.85E-02 0.37 4.8 0.1 0.08 0.009 0.006 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Styrene 0/2 1.35E-02 1.25E-02 -- -- -- -- -- -- -- -- -- -- NATetrachloroethene 0/2 1.35E-02 1.25E-02 0.41 5.3 0.03 0.03 0.003 0.002 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3trans-1,3-Dichloropropene 0/2 1.35E-02 1.25E-02 -- -- -- -- -- -- -- -- -- -- NATrichlorofluoromethane 0/2 1.35E-02 1.25E-02 -- -- -- -- -- -- -- -- -- -- NAXylene (total) 1/2 1.35E-02 8.75E-03 0.025 0.33 0.5 0.4 0.04 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3SVOCs1,1'-Biphenyl 0/2 2.35E-01 2.08E-01 -- -- -- -- -- -- -- -- -- -- NA2-Methylnaphthalene 2/2 6.10E-02 6.05E-02 0.33 4.3 0.2 0.2 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Methylphenol 0/2 2.35E-01 2.08E-01 0.012 0.16 20 17 2 1 <1 8 <1 <1 2 or 3 Out - Scenario 1, 2, or 34-Bromophenyl-phenylether 0/2 2.35E-01 2.08E-01 1.3 16.9 0.2 0.2 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34-Chloroaniline 0/2 2.35E-01 2.08E-01 -- -- -- -- -- -- -- -- -- -- NA4-Methylphenol 0/2 2.35E-01 2.08E-01 -- -- -- -- -- -- -- -- -- -- NA4-Nitroaniline 0/2 6.00E-01 5.28E-01 -- -- -- -- -- -- -- -- -- -- NAAcenaphthene 2/2 9.10E-02 8.20E-02 0.62 8.1 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acenaphthylene 2/2 1.80E-01 1.70E-01 0.33 4.3 0.5 0.5 0.04 0.04 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acetophenone 1/2 2.35E-01 1.40E-01 -- -- -- -- -- -- -- -- -- -- NAAnthracene 2/2 4.80E-01 3.95E-01 0.057 0.85 8 7 1 0.5 <1 1 <1 <1 1 Out - Scenario 1, 2, or 3Benzaldehyde 1/2 3.50E-01 2.93E-01 -- -- -- -- -- -- -- -- -- -- NABenzo(a)pyrene 2/2 2.20E+00 1.85E+00 0.15 1.5 15 12 2 1 6 6 <1 <1 3 Out - Scenario 1, 2, or 3Benzo(b)fluoranthene 1/1 2.20E+00 2.20E+00 -- -- -- -- -- -- -- -- -- -- NABenzo(g,h,i)perylene 2/2 1.10E+00 8.20E-01 0.17 0.32 6 5 3 3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Benzo(k)fluoranthene 2/2 1.40E+00 1.14E+00 -- -- -- -- -- -- -- -- -- -- NAbis(2-Ethylhexyl)phthalate 2/2 2.00E+01 1.55E+01 890 11570 0.02 0.02 0.002 0.001 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Carbazole 2/2 1.60E-01 1.55E-01 -- -- -- -- -- -- -- -- -- -- NAChrysene 2/2 1.90E+00 1.80E+00 0.17 1.3 11 11 1 1 3 5 <1 <1 3 Out - Scenario 1, 2, or 3Cyclohexane 1/2 1.35E-02 9.75E-03 -- -- -- -- -- -- -- -- -- -- NADibenzofuran 1/2 2.35E-01 1.62E-01 2 26 0.1 0.08 0.009 0.006 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Fluoranthene 2/2 2.90E+00 2.55E+00 0.42 2.2 7 6 1 1 1 2 <1 <1 2 or 3 Out - Scenario 1, 2, or 3Fluorene 2/2 1.30E-01 1.00E-01 0.077 0.54 2 1 0.2 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Hexachlorobenzene 0/2 2.35E-01 2.08E-01 0.02 0.26 12 10 0.9 0.8 <1 5 <1 <1 2 or 3 Out - Scenario 1, 2, or 3Hexachlorobutadiene 0/2 2.35E-01 2.08E-01 -- -- -- -- -- -- -- -- -- -- NAIndeno(1,2,3-cd)pyrene 2/2 1.40E+00 1.02E+00 0.2 2.6 7 5 0.5 0.4 <1 2 <1 <1 2 or 3 Out - Scenario 1, 2, or 3Isophorone 0/2 2.35E-01 2.08E-01 -- -- -- -- -- -- -- -- -- -- NANaphthalene 2/2 9.00E-02 8.55E-02 0.18 0.56 1 0.5 0.2 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3N-Nitrosodiphenylamine 1/2 1.40E+00 8.18E-01 -- -- -- -- -- -- -- -- -- -- NA

Page 1 of 2 Pond Sediment Evaluation-031912.xlsx [Pond E Chemistry]

Table A-5 - Pond E Chemistry Data Evaluation

Data from BERA Table 7-6g March 2012 EvaluationNo Effect EffectSediment Sediment No Effect HQ Effect HQ No Effect RR Effect RR

COPECs (mg/kg dry wt) FOD RME CTE Benchmark Benchmark RME CTE RME CTE RME CTE RME CTE Scenario CommentPentachlorophenol 0/2 6.00E-01 5.28E-01 -- -- -- -- -- -- -- -- -- -- NAPhenanthrene 2/2 1.80E+00 1.50E+00 0.2 1.2 9 7 2 1 2 3 <1 <1 3 Out - Scenario 1, 2, or 3Phenol 1/2 2.35E-01 1.38E-01 -- -- -- -- -- -- -- -- -- -- NAPyrene 2/2 3.10E+00 2.65E+00 0.2 1.52 16 14 2 2 5 5 <1 <1 3 Out - Scenario 1, 2, or 3Pesticides/PCBs4,4'-DDD 2/2 1.00E-02 9.60E-03 0.0049 0.028 2 2 0.4 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34,4'-DDE 1/1 9.60E-03 9.60E-03 0.0032 0.031 3 3 0.3 0.3 <1 2 <1 <1 2 or 3 Out - Scenario 1, 2, or 34,4'-DDT 0/1 4.65E-03 4.65E-03 0.0042 0.063 1 1 0.1 0.07 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3alpha-Chlordane 1/2 4.30E-03 2.24E-03 0.0032 0.018 1.3 0.7 0.2 0.1 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1016 0/2 4.65E-03 4.15E-03 0.06 0.7 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1221 0/2 9.50E-03 8.50E-03 0.06 0.7 0.2 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1232 0/2 4.65E-03 4.15E-03 0.06 0.7 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1242 0/2 4.65E-03 4.15E-03 0.06 0.7 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1248 0/2 4.65E-03 4.15E-03 0.06 0.7 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1254 1/2 2.30E-01 1.17E-01 0.06 0.7 4 2 0.3 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1260 1/2 1.20E-01 6.23E-02 0.06 0.7 2 1 0.2 0.1 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Dieldrin 1/2 1.90E-02 9.68E-03 0.0019 0.062 10 5 0.3 0.2 7 3 <1 <1 3 Out - Scenario 1, 2, or 3Endosulfan I 0/2 2.40E-04 2.13E-04 0.0029 0.073 0.1 0.1 0.003 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endosulfan II 0/2 4.65E-04 4.15E-04 0.0055 0.14 0.1 0.1 0.003 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endosulfan Sulfate 1/2 4.80E-03 4.73E-03 -- -- -- -- -- -- -- -- -- -- NAEndrin 0/2 4.65E-04 4.15E-04 0.002 0.21 0.2 0.2 0.002 0.002 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endrin Aldehyde 2/2 7.60E-03 6.05E-03 -- -- -- -- -- -- -- -- -- -- NAEndrin Ketone 0/1 4.65E-03 4.65E-03 -- -- -- -- -- -- -- -- -- -- NAGamma-Chlordane 1/1 5.60E-03 5.60E-03 -- -- -- -- -- -- -- -- -- -- NAHeptachlor Epoxide 0/2 2.40E-04 2.13E-04 0.0025 0.016 0.1 0.1 0.02 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Methoxychlor 1/2 8.10E-03 5.25E-03 0.019 0.48 0.4 0.3 0.02 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Total PCBs 2/2 2.30E-01 1.75E-01 0.06 0.68 4 3 0.3 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Toxaphene 0/2 2.40E-02 2.13E-02 0.028 0.7 1 1 0.03 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3MetalsAluminum 2/2 1.09E+04 9.47E+03 -- -- -- -- -- -- -- -- -- -- NAAntimony 2/2 1.89E+01 1.23E+01 12 60 2 1 0.3 0.2 2 <1 <1 <1 2 Out - Scenario 1, 2, or 3Arsenic 2/2 2.11E+01 1.82E+01 9.8 33 2 2 0.6 0.6 1 1 <1 <1 1 Out - Scenario 1, 2, or 3Barium 2/2 6.17E+02 5.34E+02 -- -- -- -- -- -- -- -- -- -- NABeryllium 1/2 7.20E-01 6.00E-01 -- -- -- -- -- -- -- -- -- -- NACadmium 2/2 1.59E+01 1.46E+01 1 5 16 15 3 3 9 11 2 2 6 Potential COCChromium 2/2 3.54E+02 2.79E+02 43 111 8 6 3 3 7 5 3 2 6 Potential COCCobalt 0/2 6.50E+00 5.65E+00 -- -- -- -- -- -- -- -- -- -- NACopper 2/2 6.53E+02 5.46E+02 32 149 21 17 4 4 17 15 4 3 6 Potential COCCyanide 2/2 5.00E-01 4.00E-01 -- -- -- -- -- -- -- -- -- -- NAIron 2/2 4.96E+04 3.54E+04 20,000 40,000 2 2 1 0.9 2 1 <1 <1 2 Out - Scenario 1, 2, or 3Lead 2/2 1.76E+03 1.53E+03 36 128 49 43 14 12 43 40 12 11 6 Potential COCManganese 2/2 3.26E+02 2.90E+02 460 5500 0.7 0.6 0.06 0.05 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Mercury 2/2 7.80E-01 6.60E-01 0.18 1.06 4 4 0.7 0.6 3 3 <1 <1 3 Out - Scenario 1, 2, or 3Nickel 2/2 6.17E+01 6.13E+01 23 48.6 3 3 1 1 2 2 <1 <1 3 Out - Scenario 1, 2, or 3Selenium 2/2 3.20E+00 2.85E+00 -- -- -- -- -- -- -- -- -- -- NASilver 2/2 1.17E+01 1.16E+01 2 10 6 6 1 1 5 5 <1 <1 3 Out - Scenario 1, 2, or 3Thallium 1/2 9.60E-01 5.75E-01 -- -- -- -- -- -- -- -- -- -- NAVanadium 2/2 3.43E+01 3.27E+01 -- -- -- -- -- -- -- -- -- -- NAZinc 2/2 1.46E+03 1.44E+03 120 459 12 12 3 3 10 10 3 3 6 Potential COC

Page 2 of 2 Pond Sediment Evaluation-031912.xlsx [Pond E Chemistry]

Table A-6 - Pond I Chemistry Data Evaluation

Data from BERA Table 7-6i March 2012 EvaluationNo Effect EffectSediment Sediment No Effect HQ Effect HQ No Effect RR Effect RR

COPECs (mg/kg dry wt) FOD RME CTE Benchmark Benchmark RME CTE RME CTE RME CTE RME CTE Scenario CommentVOCs1,1,1-Trichloroethane 0/3 1.45E-02 8.18E-03 0.17 2.2 0.1 0.05 0.01 0.004 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 31,1,2,2-Tetrachloroethane 0/3 1.45E-02 8.18E-03 0.94 12.2 0.02 0.01 0.001 0.0007 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 31,1-Dichloroethene 0/3 1.45E-02 8.18E-03 0.031 0.4 0.5 0.3 0.04 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Butanone 3/3 3.80E-01 1.43E-01 0.27 3.5 1 0.5 0.1 0 1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Hexanone 0/3 1.45E-02 8.18E-03 0.022 0.29 0.7 0.4 0.05 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34-Methyl-2-pentanone 0/3 1.45E-02 8.18E-03 0.033 0.43 0.4 0.2 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acetone 3/3 1.10E+00 3.97E-01 0.0087 0.11 126 46 10 4 116 39 9 3 6 Out - associated with preservation/lab analysisCarbon disulfide 2/3 1.20E-02 7.37E-03 0.00085 0.011 14 9 1 0.7 8 4 <1 <1 3 Out - Scenario 1, 2, or 3Chloromethane 0/3 1.45E-02 8.18E-03 -- -- -- -- -- -- -- -- -- -- NAcis-1,2-Dichloroethene 0/3 1.45E-02 8.18E-03 -- -- -- -- -- -- -- -- -- -- NAcis-1,3-Dichloropropene 0/3 1.45E-02 8.18E-03 -- -- -- -- -- -- -- -- -- -- NAIsopropylbenzene 0/3 1.45E-02 8.18E-03 -- -- -- -- -- -- -- -- -- -- NAMethyl acetate 1/3 2.20E-02 1.04E-02 -- -- -- -- -- -- -- -- -- -- NAMethylene chloride 0/3 2.10E-02 1.06E-02 0.37 4.8 0.1 0.03 0.004 0.002 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Styrene 0/3 1.45E-02 8.18E-03 -- -- -- -- -- -- -- -- -- -- NATetrachloroethene 0/3 1.45E-02 8.18E-03 0.41 5.3 0.04 0.02 0.003 0.002 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3trans-1,3-Dichloropropene 0/3 1.45E-02 8.18E-03 -- -- -- -- -- -- -- -- -- -- NATrichlorofluoromethane 0/3 1.45E-02 8.18E-03 -- -- -- -- -- -- -- -- -- -- NAXylene (total) 0/3 1.45E-02 9.75E-03 0.025 0.33 0.6 0.4 0.04 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3SVOCs1,1'-Biphenyl 0/3 2.80E-01 1.81E-01 -- -- -- -- -- -- -- -- -- -- NA2-Methylnaphthalene 3/3 4.70E-01 2.18E-01 0.33 4.3 1 0.7 0.1 0.05 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Methylphenol 0/3 2.80E-01 1.58E-01 0.012 0.16 23 13 2 1 4 3 <1 <1 3 Out - Scenario 1, 2, or 34-Bromophenyl-phenylether 0/3 2.80E-01 1.81E-01 1.3 16.9 0.2 0.1 0.02 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34-Chloroaniline 0/3 2.80E-01 1.81E-01 -- -- -- -- -- -- -- -- -- -- NA4-Methylphenol 0/3 2.80E-01 1.81E-01 -- -- -- -- -- -- -- -- -- -- NA4-Nitroaniline 0/3 7.00E-01 4.07E-01 -- -- -- -- -- -- -- -- -- -- NAAcenaphthene 3/3 1.80E-01 1.55E-01 0.62 8.1 0.3 0.3 0.02 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acenaphthylene 3/3 5.60E-01 3.70E-01 0.33 4.3 2 1 0.1 0.09 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acetophenone 1/3 2.80E-01 1.65E-01 -- -- -- -- -- -- -- -- -- -- NAAnthracene 3/3 8.80E-01 5.95E-01 0.057 0.85 15 10 1 0.7 7 5 <1 <1 3 Out - Scenario 1, 2, or 3Benzaldehyde 3/3 7.20E-01 3.98E-01 -- -- -- -- -- -- -- -- -- -- NABenzo(a)pyrene 3/3 3.60E+00 2.30E+00 0.15 1.5 24 15 2 2 15 9 2 <1 4 Potential COCBenzo(b)fluoranthene 3/3 3.80E+00 2.82E+00 -- -- -- -- -- -- -- -- -- -- NABenzo(g,h,i)perylene 3/3 2.70E+00 1.59E+00 0.17 0.32 16 9 8 5 7 5 4 3 6 Potential COCBenzo(k)fluoranthene 3/3 3.20E+00 1.62E+00 -- -- -- -- -- -- -- -- -- -- NAbis(2-Ethylhexyl)phthalate 3/3 4.70E+00 3.80E+00 890 11570 0.005 0.004 0.0004 0.0003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Carbazole 3/3 4.60E-01 3.05E-01 -- -- -- -- -- -- -- -- -- -- NAChrysene 3/3 3.70E+00 2.55E+00 0.17 1.3 22 15 3 2 13 9 2 1 5 Potential COCCyclohexane 2/3 3.60E-02 1.40E-02 -- -- -- -- -- -- -- -- -- -- NADibenzofuran 2/3 9.00E-02 7.63E-02 2 26 0.05 0.04 0.003 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Fluoranthene 3/3 6.60E+00 4.42E+00 0.42 2.2 16 11 3 2 10 7 2 1 5 Potential COCFluorene 3/3 3.60E-01 2.38E-01 0.077 0.54 5 3 0.7 0.4 3 2 <1 <1 3 Out - Scenario 1, 2, or 3Hexachlorobenzene 0/3 2.80E-01 1.52E-01 0.02 0.26 14 8 1 0.6 3 2 <1 <1 3 Out - Scenario 1, 2, or 3Hexachlorobutadiene 0/3 2.80E-01 1.81E-01 -- -- -- -- -- -- -- -- -- -- NAIndeno(1,2,3-cd)pyrene 3/3 2.50E+00 1.48E+00 0.2 2.6 13 7 1 0.6 6 4 <1 <1 3 Out - Scenario 1, 2, or 3Isophorone 0/3 2.80E-01 1.81E-01 -- -- -- -- -- -- -- -- -- -- NANaphthalene 3/3 6.80E-01 3.10E-01 0.18 0.56 4 2 1 0.6 3 1 <1 <1 2 Out - Scenario 1, 2, or 3N-Nitrosodiphenylamine 0/3 2.80E-01 1.81E-01 -- -- -- -- -- -- -- -- -- -- NA

Page 1 of 2 Pond Sediment Evaluation-031912.xlsx [Pond I Chemistry]

Table A-6 - Pond I Chemistry Data Evaluation

Data from BERA Table 7-6i March 2012 EvaluationNo Effect EffectSediment Sediment No Effect HQ Effect HQ No Effect RR Effect RR

COPECs (mg/kg dry wt) FOD RME CTE Benchmark Benchmark RME CTE RME CTE RME CTE RME CTE Scenario CommentPentachlorophenol 0/2 7.00E-01 5.65E-01 -- -- -- -- -- -- -- -- -- -- NAPhenanthrene 3/3 2.80E+00 1.98E+00 0.2 1.2 14 10 2 2 7 5 1 <1 3 Out - Scenario 1, 2, or 3Phenol 2/3 2.80E-01 1.62E-01 -- -- -- -- -- -- -- -- -- -- NAPyrene 3/3 5.40E+00 3.42E+00 0.2 1.52 28 18 4 2 16 9 2 1 5 Potential COCPesticides/PCBs4,4'-DDD 2/2 1.90E-02 1.00E-02 0.0049 0.028 4 2 0.7 0.4 1 <1 <1 <1 1 Out - Scenario 1, 2, or 34,4'-DDE 2/2 1.50E-02 8.18E-03 0.0032 0.031 5 3 0.5 0.3 1 1 <1 <1 1 Out - Scenario 1, 2, or 34,4'-DDT 0/1 3.55E-04 3.55E-04 0.0042 0.063 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3alpha-Chlordane 3/3 1.10E-02 4.86E-03 0.0032 0.018 3 2 0.6 0.3 3 <1 <1 <1 2 Out - Scenario 1, 2, or 3Aroclor-1016 0/2 1.80E-02 1.18E-02 0.06 0.7 0.3 0.2 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1221 0/2 1.80E-02 1.45E-02 0.06 0.7 0.3 0.2 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1232 0/2 1.80E-02 1.18E-02 0.06 0.7 0.3 0.2 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1242 0/2 1.80E-02 1.18E-02 0.06 0.7 0.3 0.2 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1248 0/2 1.80E-02 1.18E-02 0.06 0.7 0.3 0.2 0.03 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1254 1/2 3.60E-01 1.83E-01 0.06 0.7 6 3 0.5 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1260 3/3 7.60E-01 3.27E-01 0.06 0.7 13 5 1 0.5 5 2 <1 <1 3 Out - Scenario 1, 2, or 3Dieldrin 2/2 9.40E-03 4.91E-03 0.0019 0.062 5 3 0.2 0.1 2 <1 <1 <1 2 Out - Scenario 1, 2, or 3Endosulfan I 0/2 3.55E-04 3.20E-04 0.0029 0.073 0.1 0.1 0.005 0.004 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endosulfan II 0/2 5.50E-04 4.53E-04 0.0055 0.14 0.1 0.1 0.004 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endosulfan Sulfate 1/2 6.60E-03 3.48E-03 -- -- -- -- -- -- -- -- -- -- NAEndrin 0/2 5.50E-04 4.53E-04 0.002 0.21 0.2 0.2 0.003 0.002 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endrin Aldehyde 0/1 3.55E-04 3.55E-04 -- -- -- -- -- -- -- -- -- -- NAEndrin Ketone 0/1 3.55E-04 3.55E-04 -- -- -- -- -- -- -- -- -- -- NAGamma-Chlordane 2/2 7.40E-03 4.04E-03 -- -- -- -- -- -- -- -- -- -- NAHeptachlor Epoxide 0/2 3.55E-04 3.20E-04 0.0025 0.016 0.1 0.1 0.02 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Methoxychlor 0/2 2.85E-03 1.60E-03 0.019 0.48 0.2 0.1 0.01 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Total PCBs 3/3 1.12E+00 4.47E-01 0.06 0.68 19 7 2 0.7 3 <1 <1 <1 2 Out - Scenario 1, 2, or 3Toxaphene 0/2 4.45E-02 3.65E-02 0.028 0.7 2 1 0.06 0.05 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3MetalsAluminum 3/3 1.24E+04 9.98E+03 -- -- -- -- -- -- -- -- -- -- NAAntimony 3/3 4.50E+00 1.62E+00 12 60 0.4 0.1 0.08 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Arsenic 3/3 1.30E+01 1.07E+01 9.8 33 1 1 0.4 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Barium 3/3 2.19E+02 1.71E+02 -- -- -- -- -- -- -- -- -- -- NABeryllium 3/3 1.20E+00 7.22E-01 -- -- -- -- -- -- -- -- -- -- NACadmium 3/3 3.02E+01 1.54E+01 1 5 30 15 6 3 23 12 5 2 6 Potential COCChromium 3/3 2.57E+02 1.47E+02 43 111 6 3 2 1 4 2 2 <1 5 Potential COCCobalt 3/3 8.60E+00 6.32E+00 -- -- -- -- -- -- -- -- -- -- NACopper 3/3 3.55E+02 2.22E+02 32 149 11 7 2 1 8 5 2 1 5 Potential COCCyanide 2/2 2.00E+00 1.26E+00 -- -- -- -- -- -- -- -- -- -- NAIron 3/3 3.10E+04 2.43E+04 20,000 40,000 2 1 0.8 0.6 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Lead 3/3 3.00E+02 1.91E+02 36 128 8 5 2 1 3 3 <1 <1 3 Out - Scenario 1, 2, or 3Manganese 3/3 3.80E+02 3.08E+02 460 5500 0.8 0.7 0.07 0.06 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Mercury 3/3 6.60E-01 4.88E-01 0.18 1.06 4 3 0.6 0.5 2 2 <1 <1 3 Out - Scenario 1, 2, or 3Nickel 3/3 7.06E+01 3.77E+01 23 48.6 3 2 1 0.8 2 <1 <1 <1 2 Out - Scenario 1, 2, or 3Selenium 3/3 3.70E+00 2.25E+00 -- -- -- -- -- -- -- -- -- -- NASilver 3/3 1.88E+01 7.90E+00 2 10 9 4 2 0.8 8 3 2 <1 5 Potential COCThallium 2/3 9.20E-01 4.12E-01 -- -- -- -- -- -- -- -- -- -- NAVanadium 3/3 3.35E+01 2.34E+01 -- -- -- -- -- -- -- -- -- -- NAZinc 3/3 6.66E+02 4.13E+02 120 459 6 3 1 0.9 3 2 <1 <1 3 Out - Scenario 1, 2, or 3

Page 2 of 2 Pond Sediment Evaluation-031912.xlsx [Pond I Chemistry]

Table A-7 - Pond I Toxicity Data Evaluation

Data from BERA Table 7-9b and 9c March 2012 Evaluation

Site Background Note that Highest HQ for site data is max conc divided bySample Name: T05BR-005 T05BL-003 T05BL-004 Effect Criteria.

Sample Depth (Feet): 0 - 0.5 0 - 0.5 0 - 0.5 Lowest HQ for Bkgd data is min conc divided by EffectDate Collected: 6/22/2005 6/23/2005 6/23/2005 Criteria.

Location ID: T05BR-005 T05BL-003 T05BL-004 RR is Site HQ minus Bkgd HQ



Highest Site HQ Lowest Bkgd HQ RR CommentVOC2-Butanone 0.27 3.51 mg/kg dry wt 0.077 0.038 J 0.029 JAcetone 0.0087 0.1131 mg/kg dry wt 0.2 J 1.8 0.13 JEB 0.15 JEB 1.15 1 Out - RR<=1Carbon disulfide 0.00085 0.01105 mg/kg dry wt 0.0026 J 0.013 J 0.0057 JChlorobenzene 0.82 10.66 mg/kg dry wt 0.0029 J -- --Cyclohexane - - mg/kg dry wt 0.003 J -- --Ethylbenzene 3.6 46.8 mg/kg dry wt 0.0046 U 0.0053 J 0.0062 UJMethyl tert butyl ether - - mg/kg dry wt 0.0046 U 0.0041 J 0.0062 UJToluene 0.67 8.71 mg/kg dry wt 0.0046 U 0.002 J 0.0062 UJSVOC1,1'-Biphenyl - - mg/kg dry wt 0.18 U 0.19 U 0.17 U2-Methylnaphthalene 0.33 4.29 mg/kg dry wt 0.47 0.36 0.432-Methylphenol 0.012 0.156 mg/kg dry wt 0.045 U 0.046 U 0.043 UAcenaphthene 0.62 8.06 mg/kg dry wt 0.18 0.097 0.084Acenaphthylene 0.33 4.29 mg/kg dry wt 0.56 0.31 0.47Anthracene 0.0572 0.845 mg/kg dry wt 0.88 1.0 0.44 0.46 0.52 0.5 Out - RR<=1Benzaldehyde - - mg/kg dry wt 0.34 J 0.41 J 0.17 UJBenzo(a)pyrene 0.15 1.45 mg/kg dry wt 3.6 2.5 1.7 1.5 1.03 1 Out - RR<=1Benzo(b)fluoranthene - - mg/kg dry wt 3.8 2.3 1.8Benzo(g,h,i)perylene 0.17 0.32 mg/kg dry wt 2.7 8.4 1.8 1.3 4.06 4 Potential COCBenzo(k)fluoranthene - - mg/kg dry wt 3.2 1.8 1.6Benzo[a]anthracene 0.11 1.05 mg/kg dry wt 2.8 2.7 1.3 1.3 1.24 1 Out - RR<=1bis(2-Ethylhexyl)phthalate 890 11,570 mg/kg dry wt 3.6 5.9 1.9Carbazole - - mg/kg dry wt 0.46 0.22 0.17 UChrysene 0.17 1.29 mg/kg dry wt 3.7 2.9 1.8 1.5 1.16 2 Potential COCDibenz[a,h]anthracene 0.033 0.429 mg/kg dry wt 0.87 2.0 0.5 0.4 0.93 1 Out - RR<=1Dibenzofuran 2 26 mg/kg dry wt 0.18 U 0.19 U 0.17 UFluoranthene 0.42 2.23 mg/kg dry wt 6.6 3.0 2.6 2.4 1.08 2 Potential COCFluorene 0.077 0.536 mg/kg dry wt 0.36 0.22 0.18Indeno(1,2,3-cd)pyrene 0.2 2.6 mg/kg dry wt 2.5 1.5 1.2

Page 1 of 3 Pond Sediment Evaluation-031912.xlsx [Pond I Tox]








Highest Site HQ Lowest Bkgd HQ RR CommentNaphthalene 0.18 0.561 mg/kg dry wt 0.68 1.2 0.27 0.35 0.48 1 Out - RR<=1Phenanthrene 0.2 1.17 mg/kg dry wt 2.8 2.4 0.97 0.84 0.72 2 Potential COCPhenol - - mg/kg dry wt 0.16 0.18 0.16Pyrene 0.2 1.52 mg/kg dry wt 5.4 3.6 2.2 2.2 1.45 2 Potential COCTotal PAHs (1) 1.6 22.8 mg/kg dry wt 41.1 1.8 20.2 18 0.79 1 Potential COC - based on individual PAHsPesticides4,4'-DDD 0.00488 0.028 mg/kg dry wt 0.019 0.018 0.0174,4'-DDE 0.00316 0.0313 mg/kg dry wt 0.015 J R 0.016 Jalpha-Chlordane 0.0032 0.0176 mg/kg dry wt 0.011 J 0.0055 0.0034Delta-BHC 0.12 0.01 mg/kg dry wt 0.0016 0.00076 U 0.00068 UDieldrin 0.0019 0.0618 mg/kg dry wt 0.0094 0.00076 U 0.0052 JEndrin Ketone - - mg/kg dry wt 0.00071 U 0.00076 U 0.00068 UGamma-Chlordane - - mg/kg dry wt 0.0074 0.0065 0.0036PCBsAroclor-1254 0.0598 0.676 mg/kg dry wt 0.36 JEB 1.4 JEB 1.1 JEBAroclor-1260 0.0598 0.676 mg/kg dry wt 0.76 1.1 0.57 J 0.46 0.68 0.4 Out - RR<=1Total PCBs 0.0598 0.676 mg/kg dry wt 1.12 J 1.7 1.97 J 1.56 J 2.31 -1 Out - RR<=1Metals and CyanideAluminum - - mg/kg dry wt 12,000 12,000 12,000Antimony 12 60 mg/kg dry wt 0.6 J 0.52 J 0.47 JArsenic 9.79 33 mg/kg dry wt 13 10 8.1Barium - - mg/kg dry wt 200 82 79Beryllium - - mg/kg dry wt 0.9 0.88 0.73Cadmium 1 4.98 mg/kg dry wt 12 2.4 9.9 9.8 1.97 0.4 Potential COC - based on chemistry; site-relatedCalcium - - mg/kg dry wt 2,100 J 3,300 J 3,100 JChromium 43.4 111 mg/kg dry wt 140 1.3 110 120 0.99 0.3 Potential COC - based on chemistry; site-relatedCobalt - - mg/kg dry wt 7.1 12 11Copper 31.6 149 mg/kg dry wt 220 1.5 170 160 1.07 0.4 Potential COC - based on chemistry; site-relatedIron 20,000 40,000 mg/kg dry wt 31,000 25,000 17,000Lead 36 128 mg/kg dry wt 190 1.5 450 300 2.34 -1 Out - RR<=1









Highest Site HQ Lowest Bkgd HQ RR CommentMagnesium - - mg/kg dry wt 3,400 4,100 2,900Manganese 460 5,500 mg/kg dry wt 380 J 200 J 160 JMercury 0.18 1.06 mg/kg dry wt 0.6 0.54 0.47Nickel 23 48.6 mg/kg dry wt 31 52 46Potassium - - mg/kg dry wt 1,300 1,500 1,100Selenium - - mg/kg dry wt 1.2 1.5 1.3Silver 2 10 mg/kg dry wt 3.3 1.7 2.1Sodium - - mg/kg dry wt 210 2,500 2,100Thallium - - mg/kg dry wt 0.25 0.4 0.26Vanadium - - mg/kg dry wt 23 31 24Zinc 120 459 mg/kg dry wt 390 J 680 J 490 J(1) No effect/Effect criteria (TEC/PEC) were not in the original BERA


Table A-8 - Pond N Chemistry Data Evaluation

Data from BERA Table 7-6j March 2012 EvaluationNo Effect EffectSediment Sediment No Effect HQ Effect HQ No Effect RR Effect RR

COPECs (mg/kg dry wt) FOD RME CTE Benchmark Benchmark RME CTE RME CTE RME CTE RME CTE Scenario CommentVOCs1,1,1-Trichloroethane 0/1 6.00E-03 6.00E-03 0.17 2.2 0.04 0.04 0.003 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 31,1,2,2-Tetrachloroethane 0/1 6.00E-03 6.00E-03 0.94 12.2 0.01 0.01 0 0.0005 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 31,1-Dichloroethene 0/1 6.00E-03 6.00E-03 0.031 0.4 0.2 0.2 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Butanone 1/1 1.00E-02 1.00E-02 0.27 3.5 0.04 0.04 0.003 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Hexanone 0/1 6.00E-03 6.00E-03 0.022 0.29 0.3 0.3 0.02 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34-Methyl-2-pentanone 0/1 6.00E-03 6.00E-03 0.033 0.43 0.2 0.2 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acetone 1/1 8.70E-02 8.70E-02 0.0087 0.11 10 10 0.8 0.8 <1 4 <1 <1 2 or 3 Out - Scenario 1, 2, or 3Carbon disulfide 0/1 6.00E-03 6.00E-03 0.00085 0.011 7 7 0.5 0.5 1 2 <1 <1 2 or 3 Out - Scenario 1, 2, or 3Chloromethane 0/1 6.00E-03 6.00E-03 -- -- -- -- -- -- -- -- -- -- NAcis-1,2-Dichloroethene 0/1 6.00E-03 6.00E-03 -- -- -- -- -- -- -- -- -- -- NAcis-1,3-Dichloropropene 0/1 6.00E-03 6.00E-03 -- -- -- -- -- -- -- -- -- -- NAIsopropylbenzene 0/1 6.00E-03 6.00E-03 -- -- -- -- -- -- -- -- -- -- NAMethyl acetate 0/1 6.00E-03 6.00E-03 -- -- -- -- -- -- -- -- -- -- NAMethylene chloride 0/1 6.00E-03 6.00E-03 0.37 4.8 0.02 0.02 0.001 0.001 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Styrene 0/1 6.00E-03 6.00E-03 -- -- -- -- -- -- -- -- -- -- NATetrachloroethene 0/1 6.00E-03 6.00E-03 0.41 5.3 0.01 0.01 0.001 0.001 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3trans-1,3-Dichloropropene 0/1 6.00E-03 6.00E-03 -- -- -- -- -- -- -- -- -- -- NATrichlorofluoromethane 0/1 6.00E-03 6.00E-03 -- -- -- -- -- -- -- -- -- -- NAXylene (total) 0/1 6.00E-03 6.00E-03 0.025 0.33 0.2 0.2 0.02 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3SVOCs1,1'-Biphenyl 1/1 4.20E-02 4.20E-02 -- -- -- -- -- -- -- -- -- -- NA2-Methylnaphthalene 1/1 6.90E-02 6.90E-02 0.33 4.3 0.2 0.2 0.02 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 32-Methylphenol 0/1 1.65E-01 1.65E-01 0.012 0.16 14 14 1 1 <1 4 <1 <1 2 or 3 Out - Scenario 1, 2, or 34-Bromophenyl-phenylether 0/1 1.65E-01 1.65E-01 1.3 16.9 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 34-Chloroaniline 0/1 1.65E-01 1.65E-01 -- -- -- -- -- -- -- -- -- -- NA4-Methylphenol 0/1 1.65E-01 1.65E-01 -- -- -- -- -- -- -- -- -- -- NA4-Nitroaniline 0/1 4.15E-01 4.15E-01 -- -- -- -- -- -- -- -- -- -- NAAcenaphthene 1/1 9.20E-02 9.20E-02 0.62 8.1 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acenaphthylene 1/1 1.90E-01 1.90E-01 0.33 4.3 0.6 0.6 0.04 0.04 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Acetophenone 0/1 1.65E-01 1.65E-01 -- -- -- -- -- -- -- -- -- -- NAAnthracene 1/1 4.00E-01 4.00E-01 0.057 0.85 7 7 0.5 0.5 <1 1 <1 <1 1 Out - Scenario 1, 2, or 3Benzaldehyde 1/1 1.30E-01 1.30E-01 -- -- -- -- -- -- -- -- -- -- NABenzo(a)pyrene 1/1 9.80E-01 9.80E-01 0.15 1.5 7 7 1 1 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Benzo(b)fluoranthene 1/1 1.20E+00 1.20E+00 -- -- -- -- -- -- -- -- -- -- NABenzo(g,h,i)perylene 1/1 3.50E-01 3.50E-01 0.17 0.32 2 2 1 1 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Benzo(k)fluoranthene 1/1 5.80E-01 5.80E-01 -- -- -- -- -- -- -- -- -- -- NAbis(2-Ethylhexyl)phthalate 1/1 1.30E+01 1.30E+01 890 11570 0.01 0.01 0.001 0.001 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Carbazole 1/1 1.30E-01 1.30E-01 -- -- -- -- -- -- -- -- -- -- NAChrysene 1/1 1.10E+00 1.10E+00 0.17 1.3 7 7 0.9 0.9 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Cyclohexane 0/1 6.00E-03 6.00E-03 -- -- -- -- -- -- -- -- -- -- NADibenzofuran 1/1 7.20E-02 7.20E-02 2 26 0.04 0.04 0.003 0.003 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Fluoranthene 1/1 1.90E+00 1.90E+00 0.42 2.2 5 5 0.9 0.9 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Fluorene 1/1 1.30E-01 1.30E-01 0.077 0.54 2 2 0.2 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Hexachlorobenzene 0/1 1.65E-01 1.65E-01 0.02 0.26 8 8 0.6 0.6 <1 3 <1 <1 2 or 3 Out - Scenario 1, 2, or 3Hexachlorobutadiene 0/1 1.65E-01 1.65E-01 -- -- -- -- -- -- -- -- -- -- NAIndeno(1,2,3-cd)pyrene 1/1 4.10E-01 4.10E-01 0.2 2.6 2 2 0.2 0.2 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Isophorone 0/1 1.65E-01 1.65E-01 -- -- -- -- -- -- -- -- -- -- NANaphthalene 1/1 7.80E-02 7.80E-02 0.18 0.56 0.4 0.4 0.1 0.1 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3N-Nitrosodiphenylamine 0/1 1.65E-01 1.65E-01 -- -- -- -- -- -- -- -- -- -- NA

Page 1 of 2 Pond Sediment Evaluation-031912.xlsx [Pond N Chemistry]

Table A-8 - Pond N Chemistry Data Evaluation

Data from BERA Table 7-6j March 2012 EvaluationNo Effect EffectSediment Sediment No Effect HQ Effect HQ No Effect RR Effect RR

COPECs (mg/kg dry wt) FOD RME CTE Benchmark Benchmark RME CTE RME CTE RME CTE RME CTE Scenario CommentPentachlorophenol 0/1 4.15E-01 4.15E-01 -- -- -- -- -- -- -- -- -- -- NAPhenanthrene 1/1 1.10E+00 1.10E+00 0.2 1.2 5 5 0.9 0.9 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Phenol 0/1 1.65E-01 1.65E-01 -- -- -- -- -- -- -- -- -- -- NAPyrene 1/1 1.50E+00 1.50E+00 0.2 1.52 8 8 1 1 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Pesticides/PCBs4,4'-DDD 1/1 3.50E-02 3.50E-02 0.0049 0.028 7 7 1 1 5 6 <1 1 3 Out - Scenario 1, 2, or 34,4'-DDE 1/1 2.10E-02 2.10E-02 0.0032 0.031 7 7 0.7 0.7 3 5 <1 <1 3 Out - Scenario 1, 2, or 34,4'-DDT -- -- -- 0.0042 0.063 -- -- -- -- -- -- -- -- NAalpha-Chlordane 1/1 6.60E-03 6.60E-03 0.0032 0.018 2 2 0.4 0.4 1 2 <1 <1 2 or 3 Out - Scenario 1, 2, or 3Aroclor-1016 0/1 3.30E-03 3.30E-03 0.06 0.7 0.1 0.1 0.005 0.005 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1221 0/1 6.50E-03 6.50E-03 0.06 0.7 0.1 0.1 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1232 0/1 3.30E-03 3.30E-03 0.06 0.7 0.1 0.1 0.005 0.005 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1242 0/1 3.30E-03 3.30E-03 0.06 0.7 0.1 0.1 0.005 0.005 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1248 0/1 3.30E-03 3.30E-03 0.06 0.7 0.1 0.1 0.005 0.005 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1254 0/1 3.30E-03 3.30E-03 0.06 0.7 0.1 0.1 0.005 0.005 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Aroclor-1260 1/1 5.50E-01 5.50E-01 0.06 0.7 9 9 1 0.8 2 6 <1 <1 3 Out - Scenario 1, 2, or 3Dieldrin 1/1 7.40E-02 7.40E-02 0.0019 0.062 39 39 1 1 36 37 1 1 3 Out - Scenario 1, 2, or 3Endosulfan I -- -- -- 0.0029 0.073 -- -- -- -- -- -- -- -- NAEndosulfan II 0/1 3.30E-04 3.30E-04 0.0055 0.14 0.1 0.1 0.002 0.002 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endosulfan Sulfate -- -- -- -- -- -- -- -- -- -- -- -- -- NAEndrin 0/1 3.30E-04 3.30E-04 0.002 0.21 0.1 0.1 0.002 0.002 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Endrin Aldehyde 1/1 2.20E-03 2.20E-03 -- -- -- -- -- -- -- -- -- -- NAEndrin Ketone 0/1 3.30E-04 3.30E-04 -- -- -- -- -- -- -- -- -- -- NAGamma-Chlordane 1/1 1.10E-02 1.10E-02 -- -- -- -- -- -- -- -- -- -- NAHeptachlor Epoxide 0/1 1.70E-04 1.70E-04 0.0025 0.016 0.07 0.07 0.01 0.01 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Methoxychlor 1/1 1.60E-02 1.60E-02 0.019 0.48 0.8 0.8 0.03 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Total PCBs 1/1 5.50E-01 5.50E-01 0.06 0.68 9 9 0.8 0.8 <1 2 <1 <1 2 or 3 Out - Scenario 1, 2, or 3Toxaphene 0/1 1.70E-02 1.70E-02 0.028 0.7 0.6 0.6 0.02 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3MetalsAluminum 1/1 9.09E+03 9.09E+03 -- -- -- -- -- -- -- -- -- -- NAAntimony 0/1 1.05E+00 1.05E+00 12 60 0.1 0.1 0.02 0.02 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Arsenic 1/1 9.00E+00 9.00E+00 9.8 33 0.9 0.9 0.3 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Barium 1/1 1.13E+02 1.13E+02 -- -- -- -- -- -- -- -- -- -- NABeryllium 0/1 4.60E-01 4.60E-01 -- -- -- -- -- -- -- -- -- -- NACadmium 1/1 1.38E+01 1.38E+01 1 5 14 14 3 3 7 10 1 2 5 or 6 Potential COCChromium 1/1 1.63E+02 1.63E+02 43 111 4 4 1 1 2 3 <1 1 3 Out - Scenario 1, 2, or 3Cobalt 0/1 4.60E+00 4.60E+00 -- -- -- -- -- -- -- -- -- -- NACopper 1/1 2.10E+02 2.10E+02 32 149 7 7 1 1 3 5 <1 <1 3 Out - Scenario 1, 2, or 3Cyanide 1/1 4.00E+00 4.00E+00 -- -- -- -- -- -- -- -- -- -- NAIron 1/1 1.22E+04 1.22E+04 20,000 40,000 1 0.6 0.3 0.3 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Lead 1/1 1.85E+02 1.85E+02 36 128 5 5 1 1 <1 3 <1 <1 2 or 3 Out - Scenario 1, 2, or 3Manganese 1/1 1.60E+02 1.60E+02 460 5500 0.3 0.3 0.03 0.03 <1 <1 <1 <1 1 Out - Scenario 1, 2, or 3Mercury 1/1 4.30E-01 4.30E-01 0.18 1.06 2 2 0.4 0.4 <1 1 <1 <1 1 Out - Scenario 1, 2, or 3Nickel 1/1 4.92E+01 4.92E+01 23 48.6 2 2 1 1 1 1 <1 <1 1 Out - Scenario 1, 2, or 3Selenium 1/1 1.40E+00 1.40E+00 -- -- -- -- -- -- -- -- -- -- NASilver 1/1 1.05E+01 1.05E+01 2 10 5 5 1 1 4 4 <1 <1 3 Out - Scenario 1, 2, or 3Thallium 1/1 6.00E-01 6.00E-01 -- -- -- -- -- -- -- -- -- -- NAVanadium 1/1 2.39E+01 2.39E+01 -- -- -- -- -- -- -- -- -- -- NAZinc 1/1 4.78E+02 4.78E+02 120 459 4 4 1 1 1 2 <1 <1 2 or 3 Out - Scenario 1, 2, or 3

Page 2 of 2 Pond Sediment Evaluation-031912.xlsx [Pond N Chemistry]

memo regarding sediment chemicals of concern (coc

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