FINAL COMPLETION REPORT FOR SILVER LAKE AREA REMOVAL … · 2021. 7. 17. · table h-4 in-lake area...

Appendix H

Cap Sampling Data

Sample ID: SL-NSCAP-2 SL-NSCAP-3 SL-NSCAP-4 SL-NSCAP-5 SL-NSCAP-6 SL-NSCAP-7Parameter Date Collected: 10/23/12 11/14/12 11/19/12 11/27/12 12/07/12 12/17/12Near-Shore Cap ThicknessMeasured Penetration (inches) 12 11 10 12 11 11TOC ResultsTOC - Average (%) 0.78% 1.5% 1.5% 1.0% 1.5% 0.69%

Sample ID: SL-NSCAP-8 SL-NSCAP-9 SL-NSCAP-10 SL-NSCAP-11 SL-NSCAP-12 SL-NSCAP-13Parameter Date Collected: 01/17/13 03/19/13 04/02/13 04/03/13 04/11/13 05/15/13Near-Shore Cap ThicknessMeasured Penetration (inches) 12 11 10 10 11 11TOC ResultsTOC - Average (%) 1.2% 1.1% 0.53% 0.58% 1.2% 0.57%

Notes:1. Samples were collected by ARCADIS and submitted to Pace Analytical Services Inc. for analysis of total organic carbon (TOC).

TABLE H-1NEAR-SHORE AREA POST-PLACEMENT CAP SAMPLING DATA

FINAL COMPLETION REPORT FOR THE SILVER LAKE AREA REMOVAL ACTIONGENERAL ELECTRIC COMPANY - PITTSFIELD, MASSACHUSETTS

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Approximate Cap Thickness Average TOC


(inches) (%) (inches) (%)SL-CAP-1 8+ 1.3% 12.0 0.94%SL-CAP-2 5.0 0.74% 10.3 0.98%SL-CAP-3 4.0 0.65% 5.8 0.81%SL-CAP-4 4.0 1.2% 9.3 1.2%SL-CAP-5 4.75 0.93% 11.3 0.99%SL-CAP-6 2.5 0.30% 7.0 0.37%SL-CAP-7 6.75 0.38% 7.3 0.59%SL-CAP-8 5.0 0.54% 8.5 0.95%SL-CAP-9 4.5 0.66% 7.5 0.92%SL-CAP-10 3.75 0.53% 8.5 0.91%SL-CAP-11 8.75 0.67% 8.0 0.55%SL-CAP-12 2.0 0.41% 6.5 0.53%SL-CAP-13 7.75 1.1% 10.3 1.1%SL-CAP-14 3.5 0.90% 13.3 1.2%SL-CAP-15 6.25 0.75% 9.5 0.94%SL-CAP-16 7.0 0.50% 6.8 0.69%SL-CAP-17 3.0 0.50% 11.0 0.45%SL-CAP-18 4.5 0.43% 5.0 0.74%SL-CAP-19 4.5 0.25% 4.5 0.41%SL-CAP-20 4.5 0.45% 8.8 0.85%SL-CAP-21 4.5 0.37% 11.3 0.77%

Notes:

TABLE H-2SUMMARY OF DURING-CONSTRUCTION IN-LAKE AREA CAP COMPOSITION AND

THICKNESS MONITORING


1. Samples were collected by ARCADIS and submitted to Pace Analytical Services Inc. for analysis of total organic carbon (TOC).

Fourth Lift Monitoring Event(6/21/13, 6/26/13)

Eighth Lift Monitoring Event(7/23/13, 7/24/13, 7/26/13)

Location ID

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Twelfth Lift Event(9/4/13, 9/6/13)

Thirteenth Lift Event(9/4/13, 9/6/13, 9/10/13)


Approximate Cap Thickness



(inches) (%) (inches) (inches) (inches)SL-CAP-1 -- -- -- 14 --SL-CAP-2 -- -- -- 13 --SL-CAP-3 -- -- -- 13 --SL-CAP-4 -- -- -- -- --SL-CAP-5 -- -- -- -- 16.5SL-CAP-6 4.0 0.56% 7.5 0.97% [1.3%] 19 20SL-CAP-7 4.0 0.58% 15.0 1.1% [1.7%] -- --SL-CAP-8 -- -- -- -- 13SL-CAP-9 -- -- -- -- 20SL-CAP-10 -- -- -- -- 12.5SL-CAP-11 -- -- 15.0 0.63% [1.7%] -- --SL-CAP-12 2.5 0.64% 10.8 0.58% [2.4%] 12 --SL-CAP-13 -- -- -- -- 15.5SL-CAP-14 -- -- -- -- 17SL-CAP-15 -- -- -- -- 17SL-CAP-16 4.75 0.54% 11.0 0.42% [1.7%] -- --SL-CAP-17 5.75 0.71% 14.5 0.51% [2.8%] -- --SL-CAP-18 4.75 1.3% 19.0 1.3% [2.8%] -- --SL-CAP-19 7.0 0.29% 9.0 0.43% [1.4%] -- 15SL-CAP-20 7.0 0.74% -- -- --SL-CAP-21 5.0 0.16% 8.0 0.60% [2.5%] -- 9

Notes:1. TOC = total organic carbon.

4. Tier II Data Validation was performed on the EPA duplicate samples collected and sent to Test America.3. Duplicate sample results are presented in brackets.

2. Samples were collected by ARCADIS and submitted to Pace Analytical Services Inc. for analysis of total organic carbon (TOC) and to Test America, Burlington (Test America) for analysis of TOC (to provide duplicate TOC results).

(%)Average TOC

--

------

------

----------

Location ID

Sixth Lift Event(7/11/13)

Eleventh Lift Event(8/23/13, 8/26/13)

TABLE H-3SUMMARY OF INFORMAL IN-LAKE AREA CAP COMPOSITION AND/OR THICKNESS MONITORING


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TABLE H-4IN-LAKE AREA POST-PLACEMENT CAP SAMPLING DATA


Sample ID: SL-14CAP-01 SL-14CAP-01 SL-14CAP-01 SL-14CAP-02 SL-14CAP-02 SL-14CAP-02 SL-14CAP-03 SL-14CAP-03 SL-14CAP-03Sample Depth(Inches): 0-1 1-12 12-14 0-1 1-17.5 17.5-19.5 0-1 1-12 12-14

Parameter Date Collected: 09/27/13 09/27/13 09/27/13 09/13/13 09/13/13 09/13/13 09/13/13 09/13/13 09/13/13PCBs (ppm)

Aroclor-1221 ND(0.059) 0.21 PB 22 PB ND(0.059) 0.066 PB 0.21 PB ND(0.070) ND(0.060) 0.80 PB

Aroclor-1248 ND(0.059) 0.18 PE 13 PE ND(0.059) ND(0.064) 0.10 PE ND(0.070) 0.026 PE,J 0.51 PE

Aroclor-1254 ND(0.059) 0.13 AF 6.8 AF ND(0.059) ND(0.064) 0.040 AF,J ND(0.070) ND(0.060) 0.21 AF

Aroclor-1260 ND(0.059) 0.12 AG 10 AG ND(0.059) ND(0.064) 0.047 AG,J ND(0.070) ND(0.060) 0.30 AGTotal PCBs ND(0.059) 0.64 51.8 ND(0.059) 0.066 0.397 ND(0.070) 0.026 J 1.82

Pace TOC Results

TOC - Average (%) 0.13% 0.81% NA 1.0% 1.1% NA 1.9% 0.70% NATOC - Depth-Weighted Average (%) NA NA NA

Test America Duplicate TOC ResultsSample ID: SL-OT-000573-0-3S27 SL-OT-000572-0-3S27 SL-OT000540-0-3S13 SL-OT000541-0-3S13 SL-OT000542-0-3S13 SL-OT000543-0-3S13

TOC - Average (%) 1.7% 2.9% [3.6%] NA 2.5% 3.2% NA 4.2% 1.9% NATOC - Depth-Weighted Average (%) NA NA NA

Average TOC Result from Duplicate SamplesLocation ID:

TOC - Depth-Weighted Average (%) NA NA NA

Measured Thickness (inches) 14 19.5 14

0.75% 1.1% 0.80%

1.9% 2.1%

2.1%

1.5%

3.1% 3.2%

SL-CAP-03SL-CAP-02SL-CAP-01

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FINAL COMPLETION REPORT FOR SILVER LAKE AREA REMOVAL ACTIONGENERAL ELECTRIC COMPANY - PITTSFIELD, MASSACHUSETTS

Sample ID: SL-14CAP-04 SL-14CAP-04 SL-14CAP-04 SL-14CAP-05 SL-14CAP-05 SL-14CAP-05 SL-14CAP-06 SL-14CAP-06 SL-14CAP-06Sample Depth(Inches): 0-1 1-13.5 13.5-15.5 0-1 1-13.25 13.25-15.25 0-1 1-16.5 16.5-18.5


Aroclor-1221 ND(0.066) 0.032 PB,J 0.12 PB ND(0.067) 0.032 PB,J 0.094 PB 0.050 PB,J 0.081 PB 1.6 PB

Aroclor-1248 ND(0.066) ND(0.069) 0.091 PE ND(0.067) ND(0.065) 0.053 PE,J ND(0.062) ND(0.061) 1.1 PE

Aroclor-1254 ND(0.066) ND(0.069) 0.034 AF,J ND(0.067) ND(0.065) ND(0.065) ND(0.062) ND(0.061) 0.46 AF

Aroclor-1260 ND(0.066) ND(0.069) 0.049 AG,J ND(0.067) ND(0.065) ND(0.065) ND(0.062) ND(0.061) 0.77 AGTotal PCBs ND(0.066) 0.032 J 0.294 ND(0.067) 0.032 J 0.147 0.050 J 0.081 3.93

Pace TOC Results


Test America Duplicate TOC ResultsSample ID: SL-OT000544-0-3S13 SL-OT000545-0-3S13 SL-OT000546-0-3S13 SL-OT000547-0-3S13 SL-OT000548-0-3S13 SL-OT000549-0-3S13




Measured Thickness (inches) 15.5 15.25 18.5

2.0% 1.1% 0.94%

3.3% 2.2% 1.9%

4.7% 3.3% 2.9%





Sample ID: SL-14CAP-07 SL-14CAP-07 Sl-14CAP-07 SL-14CAP-08 SL-14CAP-08 SL-14CAP-08 SL-14CAP-09 SL-14CAP-09 SL-14CAP-09Sample Depth(Inches): 0-1 1-12.5 12.5-14.5 0-1 1-14.75 14.75-16.75 0-1 1-13.5 13.5-15.5


Aroclor-1221 ND(0.056) ND(0.059) 0.60 PB ND(0.063) ND(0.069) 0.11 PB ND(0.080) ND(0.077) 0.19 PB

Aroclor-1248 ND(0.056) ND(0.059) 1.3 PE ND(0.063) ND(0.069) 0.044 PE,J ND(0.080) ND(0.077) 0.17 PE

Aroclor-1254 ND(0.056) ND(0.059) 1.0 AF ND(0.063) ND(0.069) ND(0.063) ND(0.080) ND(0.077) 0.078 AF

Aroclor-1260 ND(0.056) ND(0.059) 0.61 AG ND(0.063) ND(0.069) ND(0.063) ND(0.080) ND(0.077) 0.029 AG,JTotal PCBs ND(0.056) ND(0.059) 3.51 ND(0.063) ND(0.069) 0.154 ND(0.080) ND(0.077) 0.467

Pace TOC Results






Measured Thickness (inches) 14.5 16.75 15.5

2.0% 1.8%0.51%

1.9% 3.0%

SL-CAP-08SL-CAP-07

4.5%

1.2% 2.5% 3.2%SL-CAP-09




Sample ID: SL-14CAP-10 SL-14CAP-10 SL-14CAP-10 SL-14CAP-11 SL-14CAP-11 SL-14CAP-11 SL-14CAP-12 SL-14CAP-12 SL-14CAP-12Sample Depth(Inches): 0-1 1-17 17-19 0-1 1-16 16-18 0-1 1-13.5 13.5-15.5


Aroclor-1221 ND(0.074) ND(0.069) 0.13 PB ND(0.059) ND(0.057) 0.11 PB ND(0.058) 0.36 PB 1.0 PB

Aroclor-1248 ND(0.074) ND(0.069) 0.12 PE ND(0.059) 0.086 PE 0.18 PE ND(0.058) 0.19 PE 0.51 PE

Aroclor-1254 ND(0.074) ND(0.069) 0.064 AF,J ND(0.059) 0.051 AF,J 0.20 AF ND(0.058) 0.091 AF 0.31 AF

Aroclor-1260 ND(0.074) ND(0.069) ND(0.073) ND(0.059) 0.056 AG,J 0.35 AG ND(0.058) 0.093 AG 0.24 AGTotal PCBs ND(0.074) ND(0.069) 0.314 ND(0.059) 0.193 0.84 ND(0.058) 0.734 2.06

Pace TOC Results






Measured Thickness (inches) 19 18 15.5

0.46% 0.46%1.7%

2.5% 1.6% 1.8%

3.2% 2.7% 3.1%





Sample ID: SL-14CAP-13 SL-14CAP-13 SL-14CAP-13 SL-14CAP-14 SL-14CAP-14 SL-14CAP-14 SL-14CAP-15 SL-14CAP-15 SL-14CAP-15Sample Depth(Inches): 0-1 1-31.5 31.5-33.5 0-1 1-19.5 19.5-21.5 0-1 1-16.25 16.25-18.25


Aroclor-1221 ND(0.067) 0.86 PB 2.6 PB ND(0.077) ND(0.073) 0.18 PB ND(0.070) ND(0.063) 0.21 PB

Aroclor-1248 ND(0.067) 0.55 PE 1.5 PE ND(0.077) 0.043 PE,J 0.37 PE ND(0.070) ND(0.063) 0.37 PE

Aroclor-1254 ND(0.067) 0.24 AF 0.72 AF ND(0.077) ND(0.073) 0.42 AF ND(0.070) ND(0.063) 0.22 AF

Aroclor-1260 ND(0.067) 0.18 AG 0.49 AG 0.041 AG,J ND(0.073) 0.13 AG ND(0.070) ND(0.063) 0.089 AGTotal PCBs ND(0.067) 1.83 5.31 0.041 J 0.043 J 1.1 ND(0.070) ND(0.063) 0.889

Pace TOC Results



TOC - Average (%) 4.0% 3.2% NA 4.2% 6.6% NA 4.0% 2.7% [3.4%] NATOC - Depth-Weighted Average (%) NA NA NA



Measured Thickness (inches) 21.5 18.25


33.5

1.6% 2.5% 1.3%

3.2% 6.5% 3.1%

2.4% 4.5% 2.2%




Sample ID: SL-14CAP-16 SL-14CAP-16 SL-14CAP-16 SL-14CAP-17 SL-14CAP-17 Sl-14CAP-17 SL-14CAP-18 SL-14CAP-18 SL-14CAP-18Sample Depth(Inches): 0-1 1-12.25 12.25-14.25 0-1 1-12 12-14 0-1 1-14.25 14.25-16.25


Aroclor-1221 ND(0.064) ND(0.061) 0.89 PB 0.16 PB 0.46 PB 0.95 PB ND(0.061) ND(0.066) 0.19 PB

Aroclor-1248 ND(0.064) ND(0.061) 2.4 PE 0.29 PE 0.72 PE 1.5 PE ND(0.061) 0.066 PE,J 0.59 PE

Aroclor-1254 ND(0.064) ND(0.061) 1.8 AF 0.11 AF 0.29 AF 0.82 AF ND(0.061) 0.058 AF,J 0.58 AF

Aroclor-1260 ND(0.064) ND(0.061) 1.3 AG ND(0.064) 0.095 AG 0.30 AG ND(0.061) ND(0.066) 0.18 AGTotal PCBs ND(0.064) ND(0.061) 6.39 0.56 1.57 3.57 ND(0.061) 0.124 J 1.54

Pace TOC Results






Measured Thickness (inches) 14.25 14 16.25

1.0% 1.5%0.76%

2.0% 2.1% 2.4%

3.1% 3.5% 3.3%





Sample ID: SL-14CAP-19 SL-14CAP-19 SL-14CAP-19 SL-14CAP-19 SL-14CAP-20 SL-14CAP-20 SL-14CAP-20 SL-14CAP-21 SL-14CAP-21 SL-14CAP-21Sample Depth(Inches): 0-1 1-12 12-16.5 16.5-18.5 0-1 1-14 14-16 0-1 1-17.25 17.25-19.25

Parameter Date Collected: 10/01/13 10/01/13 10/01/13 10/01/13 09/20/13 09/20/13 09/20/13 09/20/13 09/20/13 09/20/13PCBs (ppm)

Aroclor-1221 ND(0.058) ND(0.058) ND(0.058) 0.20 PB ND(0.060) ND(0.067) 0.23 PB ND(0.054) ND(0.059) 0.37 PB

Aroclor-1248 ND(0.058) ND(0.058) ND(0.058) 0.60 PE ND(0.060) ND(0.067) 0.28 PE ND(0.054) ND(0.059) 1.1 PE

Aroclor-1254 ND(0.058) ND(0.058) ND(0.058) 0.65 AF 0.025 AF,J ND(0.067) 0.16 AF ND(0.054) ND(0.059) 0.59 AF

Aroclor-1260 ND(0.058) ND(0.058) ND(0.058) 0.18 AG ND(0.060) ND(0.067) 0.077 AG ND(0.054) ND(0.059) 0.79 AGTotal PCBs ND(0.058) ND(0.058) ND(0.058) 1.63 0.025 J ND(0.067) 0.747 ND(0.054) ND(0.059) 2.85

Pace TOC Results

TOC - Average (%) 0.35% 0.47% 0.56% NA 0.70% 1.6% NA 0.25% 0.47% NATOC - Depth-Weighted Average (%) NA NA NA

Test America Duplicate TOC ResultsSample ID: SL-OT000582-0-3C01 SL-OT000583-0-3C01 SL-OT000584-0-3C01 SL-OT000568-0-3S20 SL-OT000569-0-3S20 SL-OT000570-0-3S20 SL-OT000571-0-3S20

TOC - Average (%) 2.0% 1.9% 2.7% NA 3.7% 3.4% NA 2.5% 2.0% NATOC - Depth-Weighted Average (%) NA NA NA



Measured Thickness (inches)Notes:

18.5

SL-CAP-19

16

SL-CAP-20

19.25

SL-CAP-21

1.5% 0.46%0.49%

2.0%

1.2%

3.4%

2.5%

2.1%

1.3%

1. Samples were collected by ARCADIS and submitted to Pace Analytical Services Inc. (Pace) for analysis of PCBs and total organic carbon (TOC) and to Test America, Burlington (Test America) for analysis of TOC (to provide duplicate TOC results for EPA). As agreed by EPA and GE, TOC results given in table represent the averages of the TOC results reported by Pace and Test America.2. ppm - parts per million.3. NA - not applicable.4. ND - analyte not detected. Number in parenthetical is the associated reporting limit.5. Tier II Data Validation was performed on the EPA split samples collected and sent to Test America.QualifiersAG - Aroclor 1260 is being reported as the best Aroclor match. The sample exhibits an altered PCB pattern.AF- Aroclor 1254 is being reported as the best Aroclor match. The sample exhibits an altered PCB pattern.PB - Aroclor 1221 is being used to report an altered PCB pattern exhibited by the sample. Actual Aroclor 1221 is not present in the sample, but is reported to more accurately quantify PCBs present in a sample that has undergone environmental alteration. PE - Aroclor 1248 is being used to report an altered PCB pattern exhibited by the sample. Actual Aroclor 1248 is not present in the sample, but is reported to more accurately quantify PCBs present in a sample that has undergone environmental alteration. J - Indicates that the associated numerical value is an estimated concentration. * - Value not within control limits.


Appendix I

Water Column Monitoring for

PCBs and Total Suspended Solids

Sample Date Aroclor-1016 Aroclor-1221 Aroclor-1232 Aroclor-1242 Aroclor-1248 Aroclor-1254 Aroclor-1260 Total PCBs TSS Estimated FlowLocation Collected (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppm) (cfs)7

7/26/2012(Day 1 in-water) ND(0.066) 0.530 PB ND(0.066) ND(0.066) 0.250 PE ND(0.066) 0.0690 AG 0.849 4.75 0.75

7/30/2012(Day 3 in-water) ND(0.066) 0.59 PB ND(0.066) ND(0.066) 0.22 PE 0.072 AF 0.087 AG 0.969 6.9 1.22


8/8/12 ND(0.066) 0.60 PB ND(0.066) ND(0.066) 0.18 PE ND(0.066) 0.070 AG 0.850 ND(3.57) 1.228/15/12 ND(0.066) 0.630 PB ND(0.066) 0.140 PD ND(0.066) ND(0.066) ND(0.066) 0.770 4.40 2.458/23/12 ND(0.066) 0.580 PB ND(0.066) 0.160 PD ND(0.066) ND(0.066) ND(0.066) 0.740 ND(3.33) 0.828/29/12 ND(0.130) 1.20 PB ND(0.130) ND(0.130) 0.840 PE 0.360 AF ND(0.130) 2.40 3.53 0.909/7/12 ND(0.110) 1.00 PB ND(0.110) ND(0.110) 0.550 PE 0.230 AF 0.110 AG 1.89 5.22 0.829/13/12 ND(0.110) 1.10 PB ND(0.110) ND(0.110) 0.560 PE 0.230 AF ND(0.110) 1.89 6.11

9/13/12 EPA split ND (0.52) [ND(0.51)] ND (0.52) [ND(0.51)] ND (0.52) [ND(0.51)] 0.60 NJ [0.62 NJ] ND (0.52) [ND(0.51)] ND (0.52) [ND(0.51)] 0.15 J [0.17 J] 0.75 J [0.79 J] NA9/19/12 ND(0.130) 0.91 PB ND(0.130) ND(0.130) 0.360 PE 0.140 AF ND(0.130) 1.41 4.12

9/19/13 EPA split ND (0.52) ND (0.52) ND (0.52) 0.37 NJ ND (0.52) ND (0.52) 0.14 J 0.51 J NA9/27/12 ND(0.11) 1.0 PB ND(0.11) 0.25 AD ND(0.11) ND(0.11) ND(0.11) 1.25 4.08

9/27/12 EPA split ND (0.51) ND (0.51) ND (0.51) 0.60 NJ ND (0.51) ND (0.51) 0.11 J 0.71 J NA10/3/12 ND(0.130) 0.740 PB ND(0.130) ND(0.130) 0.250 PE ND(0.130) ND(0.130) 0.990 2.5 1.3910/12/12 ND(0.110) 1.10 PB ND(0.110) ND(0.110) 0.560 PE 0.200 AF 0.270 AG 2.13 4.73 0.2910/18/12 ND(0.110) 0.810 PB ND(0.110) ND(0.110) 0.290 PE ND(0.110) ND(0.110) 1.10 8.86 0.4310/24/12 ND(0.110) 0.560 PB ND(0.110) 0.140 PD ND(0.110) ND(0.110) ND(0.110) 0.700 3.85 0.6610/31/12 ND(0.130) 1.20 PB ND(0.130) 0.21 PD ND(0.130) ND(0.130) ND(0.130) 1.41 2.88 0.9411/9/12 ND(0.13) 0.740 PB ND(0.130) 0.150 PD ND(0.130) ND(0.130) ND(0.130) 0.890 4.18 0.2511/15/12 ND(0.0880) 0.630 PB ND(0.0880) 0.140 PD ND(0.0880) ND(0.0880) ND(0.0880) 0.770 3.97 0.4311/19/12 ND(0.110) 0.730 PB ND(0.110) 0.140 PD ND(0.110) ND(0.110) ND(0.110) 0.870 6.56 0.3511/28/12 ND(0.110) 0.550 PB ND(0.110) 0.120 PD ND(0.110) ND(0.110) ND(0.110) 0.670 2.70 0.23

ND(0.0880) 0.590 PB ND(0.0880) 0.120 PD ND(0.0880) ND(0.0880) ND(0.0880) 0.710 8.69[ND(0.110)] [0.650 PB] [ND(0.110)] [0.120 PD] [ND(0.110)] [ND(0.110)] [ND(0.110)] [0.770] [7.34]

12/14/12 ND(0.0880) 0.570 PB ND(0.0880) 0.110 PD ND(0.0880) ND(0.0880) ND(0.0880) 0.680 3.88 0.5112/19/12 ND(0.0880) 0.490 PB ND(0.0880) 0.100 PD ND(0.0880) ND(0.0880) ND(0.0880) 0.590 4.27 0.824/4/13 ND(0.0440) 0.620 PB ND(0.0440) ND(0.0440) 0.190 PE 0.0870 AF ND(0.0440) 0.897 1.76 0.884/10/13 ND(0.0660) 0.610 PB ND(0.0660) 0.130 PD ND(0.0660) ND(0.0660) ND(0.0660) 0.740 1.67 0.564/15/13 ND(0.0660) 0.560 PB ND(0.0660) 0.150 PD ND(0.0660) ND(0.0660) ND(0.0660) 0.710 3.29 0.944/25/13 ND(0.660) 6.10 PB ND(0.660) 0.700 PD ND(0.660) ND(0.660) ND(0.660) 6.80 4.90 1.135/3/13 ND(0.660) 5.70 PB ND(0.660) ND(0.660) 2.20 PE 1.10 AF ND(0.660) 9.00 8.20 0.39

ND(0.440) 4.10 PB ND(0.440) 0.790 PD ND(0.440) ND(0.440) ND(0.440) 4.89 5.93 [ND(0.440)] [3.70 PB] [ND(0.440)] [0.790 PD] [ND(0.440)] [ND(0.440)] [ND(0.440)] [4.49] [6.08]

5/10/13 EPA split ND (0.51) ND (0.51) ND (0.51) ND (0.51) 1.9 0.54 0.18 J 2.62 J NA5/17/13 ND(0.440) 2.90 PB ND(0.440) ND(0.440) 0.590 PE ND(0.440) ND(0.440) 3.49 15.5 0.065/24/13 ND(0.220) 1.60 PB ND(0.220) 0.310 PD ND(0.220) ND(0.220) ND(0.220) 1.91 10.2 4.005/30/2013

(Day 1 in-water) ND(0.220) 1.70 PB ND(0.220) 0.290 PD ND(0.220) ND(0.220) ND(0.220) 1.99 9.73 5.726/3/2013

(Day 3 in-water) ND(0.130) 1.20 PB ND(0.130) 0.220 PD ND(0.130) ND(0.130) ND(0.130) 1.42 11.2 0.086/4/13 ND(0.130) 0.910 PB ND(0.130) ND(0.130) ND(0.130) ND(0.130) ND(0.130) 0.910 29.0 0.086/5/2013

(Day 5 in-water) ND(0.0880) 0.610 PB ND(0.0880) ND(0.0880) ND(0.0880) ND(0.0880) ND(0.0880) 0.610 97.5 0.096/13/13 ND(0.0440) 0.300 PB ND(0.0440) ND(0.0440) ND(0.0440) ND(0.0440) ND(0.0440) 0.300 29.6 1.586/17/13 ND(0.0220) 0.210 PB ND(0.0220) 0.0340 PD ND(0.0220) ND(0.0220) ND(0.0220) 0.244 61.5 0.076/18/13 ND(0.0220) 0.160 PB ND(0.0220) ND(0.0220) 0.0340 PE ND(0.0220) ND(0.0220) 0.194 20.9 1.276/20/13 ND(0.0220) 0.140 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.140 18.8 0.106/26/13 ND(0.0220) 0.0930 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.093 97.4 0.087/3/13 ND(0.0220) 0.100 PB ND(0.0220) ND(0.0220) 0.0270 PE ND(0.0220) ND(0.0220) 0.127 17.2 1.427/11/13 ND(0.0220) 0.0900 PB ND(0.0220) ND(0.0220) 0.0290 PE ND(0.0220) ND(0.0220) 0.119 44.7 0.127/18/13 ND(0.0220) 0.0690 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.069 25.1 0.207/25/13 ND(0.022) 0.029 PB ND(0.022) ND(0.022) ND(0.022) ND(0.022) ND(0.022) 0.029 31.5 0.128/1/13 ND(0.0220) 0.0520 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.052 10.9 0.358/8/13 ND(0.0220) 0.0280 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.028 51.9 0.088/15/13 ND(0.0220) 0.0260 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.026 37.0 B 0.208/23/13 ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 76 0.078/29/13 ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 21.5 0.089/5/13 ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 35.9 0.089/13/13 ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 28.8 1.139/20/13 ND(0.0880) 0.660 PB ND(0.0880) ND(0.0880) 0.130 PE ND(0.0880) 0.0950 AG 0.885 21.0 0.129/27/13 ND(0.0220) 0.0220 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.022 27.6 0.0610/4/13 ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 9.1 2.7010/11/13 ND(0.0220) 0.0510 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.051 8.0 NA10/14/13 ND(0.0220) 0.0350 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.035 8.5 NA

0.61

12/6/12 0.39

MON-1

5/10/13

0.98

2.77

0.82

TABLE I-1WATER QUALITY MONITORING


4/18/2014G:\GE\GE_Silver_Lake\Reports and Presentations\2014 draft Final Completion Report\Appendix I\0841411214_Water Column data summary.xlsx Page 1 of 3



Sample Date Aroclor-1016 Aroclor-1221 Aroclor-1232 Aroclor-1242 Aroclor-1248 Aroclor-1254 Aroclor-1260 Total PCBs TSS Estimated FlowLocation Collected (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppm) (cfs)7

6/28/2012(monthly program) ND(0.066) 0.550 PB ND(0.066) 0.140 PD ND(0.066) ND(0.066) 0.0960 AG 0.786 3.82 1.13

7/13/12 ND(0.110) 0.530 PB ND(0.110) 0.120 PD ND(0.110) ND(0.110) ND(0.110) 0.650 5.58 NA7/26/2012

(Day 1 in-water) ND(0.0440) 0.470 PB ND(0.0440) ND(0.0440) 0.210 PE 0.0520 AF 0.0620 AG 0.794 4.44 0.75


8/1/2012(Day 5 in-water) ND(0.066) 0.58 PB ND(0.066) ND(0.066) 0.24 PE 0.11 AF 0.19 AG 1.11 ND(3.70) 0.75

8/8/12 ND(0.066) 0.63 PB ND(0.066) ND(0.066) 0.18 PE ND(0.066) 0.072 AG 0.882 ND(3.70) 1.228/15/12 ND(0.066) 0.61 PB ND(0.066) 0.140 PD ND(0.066) ND(0.066) ND(0.066) 0.750 ND(3.85) 2.458/23/12 ND(0.066) 0.650 PB ND(0.066) 0.180 PD ND(0.066) ND(0.066) ND(0.066) 0.830 ND(2.27) 0.828/29/12 ND(0.130) 1.20 PB ND(0.130) ND(0.130) 0.770 PE 0.360 AF ND(0.130) 2.33 4.32 0.909/7/12 ND(0.110) 0.980 PB ND(0.110) ND(0.110) 0.610 PE 0.230 AF ND(0.110) 1.82 5.68 0.829/13/12 ND(0.110) 1.00 PB ND(0.110) ND(0.110) 0.490 PE 0.200 AF ND(0.110) 1.69 5.31

9/13/12 EPA split ND (0.52) ND (0.52) ND (0.52) 0.66 NJ ND (0.52) ND (0.52) 0.15 J 0.81 J NAND(0.130) 0.870 PB ND(0.130) ND(0.130) 0.240 PE ND(0.130) ND(0.130) 1.11 2.25 [ND(0.130)] [0.780 PB] [ND(0.130)] [0.210 PD] [ND(0.130)] [ND(0.130)] [ND(0.130)] [0.990] [3.89]

9/19/13 EPA split ND (0.51) ND (0.51) ND (0.51) 0.35 NJ ND (0.51) ND (0.51) 0.13 J 0.48 J NA9/27/12 ND(0.13) 1.1 PB ND(0.13) 0.21 AD ND(0.13) ND(0.13) ND(0.13) 1.31 4.26

9/27/12 EPA split ND (0.51) ND (0.51) ND (0.51) 0.55 NJ ND (0.51) ND (0.51) 0.10 J 0.65 J NA10/3/12 ND(0.130) 1.20 PB ND(0.130) ND(0.130) 0.420 PE 0.220 AF 0.180 AG 2.02 13.5 1.3910/12/12 ND(0.110) 0.850 PB ND(0.110) ND(0.110) 0.350 PE 0.150 AF 0.130 AG 1.48 6.05 0.2910/18/12 ND(0.110) 0.760 PB ND(0.110) ND(0.110) 0.230 PE ND(0.110) ND(0.110) 0.990 7.12 0.4310/24/12 ND(0.110) 0.620 PB ND(0.110) 0.130 PD ND(0.110) ND(0.110) ND(0.110) 0.750 4.17 0.6610/31/12 ND(0.130) 1.30 PB ND(0.130) 0.21 PD ND(0.130) ND(0.130) ND(0.130) 1.51 2.45 0.9411/9/12 ND(0.13) 0.780 PB ND(0.130) 0.130 AD ND(0.130) ND(0.130) ND(0.130) 0.910 2.42 0.2511/15/12 ND(0.0880) 0.690 PB ND(0.0880) 0.140 PD ND(0.0880) ND(0.0880) ND(0.0880) 0.830 4.23 0.4311/19/12 ND(0.110) 0.720 PB ND(0.110) 0.150 PD ND(0.110) ND(0.110) ND(0.110) 0.870 4.57 0.3511/28/12 ND(0.0880) 0.500 PB ND(0.0880) 0.130 PD ND(0.0880) ND(0.0880) ND(0.0880) 0.630 2.83 0.2312/6/12 ND(0.110) 0.610 PB ND(0.110) 0.140 PD ND(0.110) ND(0.110) ND(0.110) 0.750 6.97 0.3912/14/12 ND(0.0880) 0.510 PB ND(0.0880) 0.110 PD ND(0.0880) ND(0.0880) ND(0.0880) 0.620 4.50 0.5112/19/12 ND(0.0660) 0.460 PB ND(0.0660) 0.100 PD ND(0.0660) ND(0.0660) ND(0.0660) 0.560 4.44 0.821/4/13 ND(0.0660) 0.390 PB ND(0.0660) 0.100 PD ND(0.0660) ND(0.0660) ND(0.0660) 0.490 3.02 0.431/11/13 ND(0.110) 0.510 PB ND(0.110) ND(0.110) 0.330 PE 0.280 AF 0.630 AG 1.75 10.7 0.081/17/13 ND(0.0660) 0.390 PB ND(0.0660) ND(0.0660) 0.100 PE ND(0.0660) ND(0.0660) 0.490 8.60 0.761/24/13 See Note 6 See Note 6 See Note 6 See Note 6 See Note 6 See Note 6 See Note 6 See Note 6 11.3 0.151/30/13 ND(0.0660) 0.410 PB ND(0.0660) 0.100 PD ND(0.0660) ND(0.0660) ND(0.0660) 0.510 4.46 0.661/31/13 ND(0.0660) 0.400 PB ND(0.0660) 0.0730 PD ND(0.0660) ND(0.0660) ND(0.0660) 0.473 10.6 18.652/7/13 ND(0.0660) 0.350 PB ND(0.0660) 0.0670 PD ND(0.0660) ND(0.0660) ND(0.0660) 0.417 3.87 0.352/14/13 ND(0.0660) 0.530 PB ND(0.0660) 0.0710 PD ND(0.0660) ND(0.0660) ND(0.0660) 0.601 3.64 0.472/20/13 ND(0.0880) 0.710 PB ND(0.0880) 0.0890 PD ND(0.0880) ND(0.0880) ND(0.0880) 0.799 ND(1.33) 0.202/28/13 ND(0.0440) 0.550 PB ND(0.0440) 0.0620 PD ND(0.0440) ND(0.0440) ND(0.0440) 0.612 ND(1.41) 2.603/8/13 ND(0.0880) 0.530 PB ND(0.0880) ND(0.0880) ND(0.0880) ND(0.0880) ND(0.0880) 0.530 3.79 1.273/14/13 ND(0.0440) 0.390 PB ND(0.0440) ND(0.0440) ND(0.0440) ND(0.0440) ND(0.0440) 0.390 2.73 B 7.043/20/13 ND(0.0440) 0.360 PB ND(0.0440) 0.0500 PD ND(0.0440) ND(0.0440) ND(0.0440) 0.410 2.55 1.833/27/13 ND(0.0880) 0.880 PB ND(0.0880) ND(0.0880) ND(0.0880) ND(0.0880) ND(0.0880) 0.880 ND(2.00) 0.884/4/13 ND(0.0440) 0.600 PB ND(0.0440) ND(0.0440) 0.150 PE 0.0710 AF ND(0.0440) 0.821 3.74 0.884/10/13 ND(0.0660) 0.610 PB ND(0.0660) 0.140 PD ND(0.0660) ND(0.0660) ND(0.0660) 0.750 2.18 0.564/15/13 ND(0.0660) 0.590 PB ND(0.0660) 0.130 PD ND(0.0660) ND(0.0660) ND(0.0660) 0.720 3.48 0.944/25/13 ND(0.660) 6.10 PB ND(0.660) ND(0.660) ND(0.660) ND(0.660) ND(0.660) 6.10 4.20 1.135/3/13 ND(0.660) 5.40 PB ND(0.660) ND(0.660) 2.00 PE 0.980 AF ND(0.660) 8.38 6.67 0.395/10/13 ND(0.440) 4.00 PB ND(0.440) 0.850 PD ND(0.440) 0.460 AF ND(0.440) 5.31 5.20

5/10/13 EPA split ND (0.51) ND (0.51) ND (0.51) ND (0.51) 1.9 0.52 J* 0.19 J 2.61 J NA5/17/13 ND(0.13) 1.10 PB ND(0.130) ND(0.130) 0.380 PE 0.140 AF ND(0.130) 1.62 5.20 0.065/24/13 ND(0.220) 1.60 PB ND(0.220) 0.280 PD ND(0.220) ND(0.220) ND(0.220) 1.88 10.7 4.005/30/2013

(Day 1 in-water) ND(0.220) 1.60 PB ND(0.220) 0.270 PD ND(0.220) ND(0.220) ND(0.220) 1.87 12.8 5.72

6/3/2013(Day 3 in-water) ND(0.130) 0.930 PB ND(0.130) 0.170 PD ND(0.130) ND(0.130) ND(0.130) 1.10 6.1 0.08

6/4/13 ND(0.110) 0.760 PB ND(0.110) 0.130 PD ND(0.110) ND(0.110) ND(0.110) 0.890 15.6 0.086/5/2013

(Day 5 in-water) ND(0.110) 0.680 PB ND(0.110) ND(0.110) ND(0.110) ND(0.110) ND(0.110) 0.680 17.4 0.09

ND(0.0440) 0.290 PB ND(0.0440) ND(0.0440) ND(0.0440) ND(0.0440) ND(0.0440) 0.290 27.4[ND(0.0440)] [0.300 PB] [ND(0.0440)] [ND(0.0440)] [ND(0.0440)] [ND(0.0440)] [ND(0.0440)] [0.300] [33.0]

6/17/13 ND(0.0220) 0.200 PB ND(0.0220) ND(0.0220) 0.0490 PE 0.0370 AF ND(0.0220) 0.286 31.8 0.076/18/13 ND(0.0220) 0.180 PB ND(0.0220) ND(0.0220) 0.0340 PE ND(0.0220) ND(0.0220) 0.214 19.9 1.276/20/13 ND(0.0440) 0.410 PB ND(0.0440) ND(0.0440) 0.130 PE 0.0480 AF ND(0.0440) 0.588 10.6 0.106/26/13 ND(0.0440) 0.320 PB ND(0.0440) ND(0.0440) ND(0.0440) ND(0.0440) ND(0.0440) 0.320 16.4 0.087/3/13 ND(0.0220) 0.110 PB ND(0.0220) ND(0.0220) 0.0280 PE ND(0.0220) ND(0.0220) 0.138 12.4 1.427/11/13 ND(0.0220) 0.200 PB ND(0.0220) ND(0.0220) 0.0510 PE 0.0260 AF ND(0.0220) 0.277 24.7 0.127/18/13 ND(0.0220) 0.0850 PB ND(0.0220) ND(0.0220) 0.0250 PE ND(0.0220) ND(0.0220) 0.110 25.0 0.207/25/13 ND(0.022) 0.081 PB ND(0.022) ND(0.022) ND(0.022) ND(0.022) ND(0.022) 0.081 25.0 0.128/1/13 ND(0.0220) 0.0590 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.059 9.10 0.35

ND(0.0220) 0.140 PB ND(0.0220) ND(0.0220) 0.0410 PE 0.0250 AF ND(0.0220) 0.206 21.4[ND(0.0220)] [0.150 PB] [ND(0.0220)] [ND(0.0220)] [0.0410 PE] [0.0250 AF] [ND(0.0220)] [0.216] [21.1]

8/15/13 ND(0.0220) 0.170 PB ND(0.0220) ND(0.0220) 0.0270 PE ND(0.0220) ND(0.0220) 0.197 36.7 B 0.208/23/13 ND(0.0660) 0.510 PB ND(0.0660) ND(0.0660) 0.140 PE 0.091 AF ND(0.0660) 0.741 31.4 0.078/29/13 ND(0.0440) 0.490 PB ND(0.0440) ND(0.0440) 0.089 PE 0.045 AF ND(0.0440) 0.624 12.3 0.089/5/13 ND(0.0440) 0.340 PB ND(0.0440) ND(0.0440) 0.072 PE 0.049 AF ND(0.0440) 0.461 24.2 0.089/13/13 ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 31.1 1.139/20/13 ND(0.220) 1.70 PB ND(0.220) ND(0.220) ND(0.220) ND(0.220) ND(0.220) 1.70 21.6 0.12

ND(0.0440) 0.320 PB ND(0.0440) ND(0.0440) 0.0960 PE ND(0.0440) ND(0.0440) 0.416 30.9 [ND(0.0440)] [0.340 PB] [ND(0.0440)] [ND(0.0440)] [0.120 PE] [0.0480 AF] [ND(0.0440)] [0.508] [28.6]

10/4/13 ND(0.0220) 0.0360 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.036 10.4 2.7010/11/13 ND(0.0220) 0.0460 PB ND(0.0220) ND(0.0220) 0.0270 PE ND(0.0220) 0.0220 AG 0.095 8.6 NA10/14/13 ND(0.0220) 0.0400 PB ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) ND(0.0220) 0.040 17.9 NA

6/13/13 1.58

9/19/12

MON-2

0.82

8/8/13 0.08

9/27/13 0.06

0.61

0.98

2.77




Notes:1. Unless otherwise identified as an EPA Split, samples were collected by ARCADIS and submitted to Pace Analytical Services Inc. for analysis of unfiltered PCBs and total suspended solids (TSS). EPA Split samples were collected by EPA and submitted separately for analysis.2. Tier II Data Validation was performed on the EPA Split samples.2. ND - Analyte was not detected. The number in parentheses is the associated reporting limit.3. ppb - parts per billion; ppm - parts per million; cfs - cubic feet per second4. Field duplicate sample results are presented in brackets.5. No sample was collected at the MON-1 location from 1/4/13 to 3/27/13 due to the presence of ice on Silver Lake.6. Not Analyzed - Due to amber glass bottle for PCB analysis was broken upon receipt.7. The velocity profile used to estimate the flow in the channel to the Outlet to the Housatonic River was revised once the channel configuration was altered during construction. The revised curve is based on a limited amount of data collected during construction (8 points), and represents channel flow that, relative to normal conditions, is altered a weir system (with stop logs), in-channel-wide impermeable turbidity curtains, and other possible obstructions associated with the ongoing construction activities. This revised curve can be used to estimate the flow in the channel starting on October 12, 2012 and going through the present date.

Data Qualifiers:AD - Aroclor 1242 is being reported as the best Aroclor match. The sample exhibits an altered PCB pattern.AF - Aroclor 1254 is being reported as the best Aroclor match. The sample exhibits an altered PCB pattern.AG - Aroclor 1260 is being reported as the best Aroclor match. The sample exhibits an altered PCB pattern.PB - Aroclor 1221 is being used to report an altered PCB pattern exhibited by the sample. Actual Aroclor 1221 is not present in the sample, but is reported to more accurately quantify PCBs present in a sample that has undergone environmental alteration. PD - Aroclor 1242 is being used to report an altered PCB pattern exhibited by the sample. Actual Aroclor 12442 is not present in the sample, but is reported to more accurately quantify PCBs present in a sample that has undergone environmental alteration. PE - Aroclor 1248 is being used to report an altered PCB pattern exhibited by the sample. Actual Aroclor 1248 is not present in the sample, but is reported to more accurately quantify PCBs present in a sample that has undergone environmental alteration. B - analyte was detected in the associated method blank.NJ - Estimated Aroclor - 1242 value due to Aroclor-1242 considered tentatively identified & presumptively present.J - Estimated PCB values due to detected concentration lower than the reporting limit but above the Method Detection Limit (MDL).


Appendix J

Turbidity Monitoring

G:\GE\GE_Silver_Lake\Reports and Presentations\2014 draft Final Completion Report\Appendix J\0841411214_SilverLake_TurbData_01-05-14CCC.xlsx

0

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20

30

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7/10/12 8/29/12 10/18/12 12/7/12 1/26/13 3/17/13 5/6/13 6/25/13 8/14/13 10/3/13

Turb

idit

y (N

TU)

Date

Figure J-1: Turbidity Results for Silver Lake Area Removal Action

MON-1 (Lake)

MON-2 (Outfall)

Baseline

Notes: 1. Major tick marks along the horizontal axis are at midnight. Turbidity measurements were recorded every 15 minutes. 2. Exceedances above 50 NTU at MON-2 were also observed during non-work hours or during storm events on7/24, 8/5, 8/17, 8/27, 9/5, 9/8, 9/22, and 9/30 (in 2012) and 1/31, 5/11, 5/22, 5/29, 6/5, 6/7, 6/14, 6/24, 7/3, 7/7, 7/11, 7/12, 7/13, 7/14, 7/19, 7/20, 7/21, 7/23, 7/24, 8/6, 8/7, 8/8, 8/9, 8/13, 8/15, 8/16, 8/17, 8/18, 8/30, 8/31, 9/1, 9/3, 9/4, 9/5, 9/6, 9/7, 9/8, 9/10, 9/11, 9/12, 9/13, 9/14, 9/15, 9/16, 9/17, 10/4, 10/12, 10/13, 10/17 (in 2013). As these exceedances were caused by weather events and/or field conditions not not attributed to active construction, the observations have been removed from the above Figure. 3. A water quality sample was collected due to the exceedance above 50 NTU at MON-2 on 10/3/12, 1/17/13, 4/15/13, 6/4/13, 6/17/13, 6/18/13, 6/20/13, 6/26/13. 4. Malfunctions in the real-time turbidity monitor (used to collected the date presented in this Figure) indicated turbidity levels exceeded 50 NTU at MON-1 and/or MON-2 at certain times during and outside of work hours. At such times (or before work was started the following day), manual readings and/or visual observation were performed at MON-2 to confirm that turbidity levels were below the early action level of 35 NTU. The most extraneous of these exceedances have been removed from the above Figure.

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