andrew t. shfer · rose howell, ep a (cover letter and cd of enclosure) kenneth kimmell, mdep...

Andrew T. SHfer

GE 319 Great Oaks Blvd. Albany, NY 12203

T5188622703 F 518 8622731 [email protected]

Transmitted via Overnight Delivery

September 16,2011

Ms. Susan Svirsky U.S. Environmental Protection Agency clo Weston Solutions, Inc. 10 Lyman Street Pittsfield, MA 01201

Re: GE-Pittsfield/Housatonic River Site Rest of River (GECD850) Evaluation of Y oung-of-the-Year Fish PCB Data

Dear Ms. Svirsky:

The Revised Corrective Measures Study (CMS) Report for the Rest of River, submitted to EPA in October 2010, discussed in Section 6.2.5.2 the results of the 2008 sampling conducted by General Electric (GE) as part of its long-term program of biennial sampling of young-of-theyear (YOY) fish in the Rest of River portion of the Housatonic River. The Revised CMS Report also included a comparison of those data with prior YOY data from the program, noting that the 2008 data generally show a decline in PCB concentrations from prior years.

Since the submittal of that report, GE has received and reviewed the results of its 2010 biennial sampling event for the YOY fish. The results from this sampling event were provided to EPA in GE's monthly progress report for January 2011 under the Consent Decree. In addition, at GE's request, ARCADIS has prepared a technical memorandum summarizing the results of the 2010 YOY sampling, comparing those results to the data from prior years, and presenting the results of statistical analyses of temporal trends in the data over the course of the YOY sampling program (1994-2010). A copy of that technical memorandum is enclosed.

As indicated in that memorandum, review of the 2010 data further supports the conclusion in the Revised CMS Report that there has been a decline in PCB concentrations in YOY fish over time. As shown, the results from 2010 as well as 2008 continue to indicate a general decline in PCB concentrations from prior years at all sampling stations. Moreover, the statistical analyses presented in the enclosed memorandum confirm this decline. These analyses reveal that, at each of the stations, PCB concentrations in the YOY fish show a statistically significant temporal decrease over the 1994-2010 period. Further, a comparison of the YOY results from

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mailto:[email protected]

the years prior to remedial activities in the East Branch of the river (1994 and 1996) to the results from the years after all those remedial activities were completed (2008 and 2010) shows a statistically significant decrease in PCB concentrations from the pre-remediation period to the post-remediation period.

These data and analyses provide a further indication that the source control and remediation efforts upstream of the East/West Branch Confluence, together with ongoing natural recovery in the Rest of River, have resulted in a significant reduction in PCB concentrations in fish in the Rest of River, particularly in the stretch from the Confluence to Woods Pond Dam. This reduction would be expected to continue under monitored natural recovery, considering both the remaining upstream remediation efforts (e.g., at East Street Area 2-South, Silver Lake, and Unkamet Brook) and natural recovery processes.

Please put this letter and the attached technical memorandum in the administrative record for the Rest of River remedy decision. Also, please call me if you have any questions about this matter.

Very truly yours,

dNk/ r~~ Andrew T. Silfer, P.E. GE Project Coordinator

Enclosure

cc: Dean Tagliaferro, EPA Timothy Conway, EPA Holly Inglis, EPA Rose Howell, EP A (cover letter and CD of enclosure) Kenneth Kimmell, MDEP Michael Gorski, MDEP (cover letter and CD of enclosure) Eva Tor, MDEP (cover letter and CD of enclosure) John Ziegler, MDEP (hard copy and CD of enclosure) Mary Griffin, MA DFG Susan Peterson, CDEP Roderic McLaren, GE Kevin Mooney, GE Stuart Messur, ARCADIS James Bieke, Goodwin Procter Jeffrey Porter, Mintz, Levin Public Information Repositories GE Internal Repository

C:IUsersldknutsenlAppDataILocaIIMicrosof\IWindowsITemporary Internet FileslContent.Outiookl4MOS852Y127 41111214_Cover Letter (2),doc

ARCADIS of New York, Inc.

6723 Towpath Road

P.O. Box 66

Syracuse

New York 13214-0066 MEMO Tel 315.446.9120

To: Copies: Fax 315.449.0017

Andrew T. Silfer, GE Kevin G. Mooney, GE. Stuart D. Messur, ARCADIS David W. Knutsen, ARCADIS

From:

David J. Buys

Date: ARCADIS Project No.:

September 16, 2011 B0020199

Subject:

2010 Housatonic River Young-of-the-Year Fish Sampling Results and Statistical Analyses of 1994-2010 Young-of-the-Year Fish PCB Data

This technical memorandum summarizes the results of the 2010 biennial sampling of young-of-the-year (YOY) resident fish collected from the Rest of River portion of the Housatonic River, and presents statistical analyses performed on the YOY fish tissue PCB data from the biennial sampling program from 1994 through 2010 to evaluate trends over time.

Background

The biennial trend monitoring program for YOY fish from the Housatonic River was implemented as a long-term monitoring tool, as described in the MCP Supplemental Phase II Scope of Work and Proposal for RCRA Facility Investigation of the Housatonic River and Silver Lake (BBL, 1994). From 1994 to 2010, on a biennial basis, ARCADIS (formerly Blasland, Bouck & Lee, Inc. [BBL]) has collected multiple whole-body composite samples of representative YOY fish species – largemouth bass, yellow perch, and bluegill sunfish (or, when bluegill are not available, pumpkinseed sunfish) – from up to four locations in the Rest of River portion of the Housatonic River for analyses of PCB concentrations and lipid content in the fish.

Since 1994, these samples have been collected from three locations in the River: (1) HR2, which is between the Pittsfield wastewater treatment plant and Roaring Brook; (2) within Woods Pond; and (3) HR6, which is south of Rising Pond and just upstream of the Connecticut border. In 1996, a fourth sampling location in the Glendale Dam impoundment was added. These locations are shown on Figure 1. Within each location, several types of habitat and cover types are sampled to obtain sufficient numbers of YOY fish. The YOY fish are composited into whole-body composite samples, with a target of obtaining seven YOY whole-body composite samples of each species from each location, and each composite typically containing a minimum of five individual fish. The samples are analyzed for PCB Aroclors and percent lipid, and the results are reported on a wet-weight basis (mg/kg). Lipid-normalized PCB

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concentrations are calculated by dividing the wet-weight PCB concentrations by percent lipids and then multiplying that value by 100 for each sample (mg/kg lipid).

2010 YOY Sampling

As in prior years, the 2010 sampling involved the collection of three YOY fish species – largemouth bass, yellow perch, and bluegill – at each of the four sampling locations mentioned above and shown on Figure 1. From October 12 to 27, 2010, seven YOY whole-body composite samples of each species (typically with at least five fish per composite) were collected at each of those locations. This resulted in the collection of a total of 84 composite samples. For each species, information was recorded including date collected, number of fish, fish length range, and total sample weight. After processing, the samples were sent to Pace Analytical, Inc. in Green Bay, Wisconsin, for analyses of PCB Aroclors and lipid content. The analytical data were subsequently validated in accordance with the procedures in GE’s approved Field Sampling Plan/Quality Assurance Project Plan (FSP/QAPP) (ARCADIS BBL, 2007). The data validation results indicate that the analytical data set had an overall usability of 100%.

The results of the 2010 sampling effort are presented in Table 1. The average wet-weight PCB concentrations for each species and location are summarized below:

Species Average 2010 Wet-Weight PCB Concentration (mg/kg)

HR2 Woods Pond Glendale Dam HR6

Largemouth Bass 19 17 4.6 1.4

Yellow Perch 18 20 4.1 2.4

Bluegill 14 13 3.9 1.6

Comparison to Prior Data

In all, a total of 701 whole-body composite YOY fish samples have been collected over the period from 1994 through 2010 and submitted for PCB Aroclor and percent lipid analyses. Table 2 presents the average wet-weight and lipid-normalized PCB concentrations for each species and location for each year of the program, thus allowing comparison of the 2010 data to the data from prior years.

Review of the 2010 data indicates that, as in prior sampling years, the fish PCB concentrations (both wet-weight and lipid-normalized) decrease in a downstream direction, from HR2 and Woods Pond to Glendale Dam and then to HR6. Figures 2 and 3 show the mean PCB data for each species for all years of the program plotted by location from upstream to downstream.


In addition, while variability in the PCB concentrations from year to year is observed (as expected due to variability in conditions such as river hydrology and water temperature), the sampling data from the two most recent sampling events (2008 and 2010) show a decrease in PCB concentrations (both wet-weight and lipid-normalized) relative to most prior sampling years. Figures 4 through 7 show, for all years of the program, the mean PCB data for each location and species plotted by sampling year, with linear regression lines to show trends. These figures demonstrate that, for every location and species, the linear relationship is decreasing over time.

Statistical Analyses of Temporal Trends

Statistical testing has been done to assess whether the temporal trends indicated by the data are statistically significant. The 701 sample results from this program over the 1994-2010 period comprise the data set used for statistical testing.

Methods

Two sets of statistical tests were performed on the YOY fish sampling data (both wet-weight and lipid-normalized).

• First, a statistical test was performed to address temporal trend in YOY fish PCB concentrations over the entire period of the program (1994-2010).

• Second, given the potential impact on YOY fish PCB concentrations in the Rest of River due to the remediation actions that were conducted in the Upper ½ Mile and 1½ Mile Reaches of the East Branch of the River, a statistical test was performed to compare the PCB concentrations in the period prior to those upstream remediation activities (i.e., 1994 and 1996) with concentrations in the period after completion of those activities (i.e., 2008 and 2010).

For both sets of tests, the statistical analyses were performed, by location, for all fish species combined. However, individual species effects were also evaluated by comparing the data for the individual species to the data for all species combined. The fish tissue PCB data were analyzed for temporal trends for both wet-weight and lipid-normalized concentrations.1

1 These temporal trends were evaluated using a mixed effects linear model to analyze for differences between time periods, either over time (first bullet above) or before versus after remediation (second bullet above). Each sampling location was separately evaluated. Standard diagnostic techniques were used to examine the model output. In some comparisons, one to three outliers were set aside due to their effect on the analyses. This is a common procedure in statistical evaluations; the outliers are identified in footnotes in Tables 3 and 4, discussed below. For a discussion of mixed effects models and diagnostic methods, see Neter et al. (1990) and Belsley et al. (2004), respectively.


Results

The statistical analyses support the temporal decline in PCB concentrations indicated on the graphs presented in Figures 4 through 7. The results of these analyses are shown in Figures 8 through 11 and Tables 3 and 4 and are discussed below.

For the overall sampling period (1994-2010), at all four sampling locations, PCB concentrations in YOY fish tissue for all species combined display statistically significant decreases (p < 0.05) through time, for both wet-weight and lipid-normalized measurements. This is shown in Table 3 (rows labeled as Overall Model) and Figures 8 through 11. For example, average annual decreases in mean wet-weight PCB concentrations range from 0.835 mg/kg per year at HR2 (an overall reduction of 13.4 mg/kg or a 46% decrease from 1994 to 2010) to 0.086 mg/kg per year at HR6 (an overall reduction of 1.4 mg/kg or a 38% decrease from 1994 to 2010). In addition, Table 3 (rows labeled as Species) shows that, at each location, the decreases in PCB concentrations in the individual species were not significantly different from the overall decrease in PCB concentrations for all species combined.2

PCB concentrations in YOY fish likewise decreased significantly (p < 0.05) from the period prior to upstream remediation (represented by samples from 1994 and 1996) to the period after that remediation (represented by samples from 2008 and 2010) at all four sampling locations for all species combined, on both wet-weight and lipid-normalized bases. This is shown in Table 4 (rows labeled as Overall Model). For example, the differences from pre- to post-remedial wet-weight PCB concentrations range from 12.2 mg/kg at HR2 (an overall reduction of 44% from pre- to post-remediation) to 1.3 mg/kg at HR6 (an overall reduction of 40% from pre- to post-remediation). Table 4 (rows labeled as Species) also shows that the declines in PCB concentrations in the individual species were not statistically significantly different from the decline for all species at any location, with two exceptions: (1) lipid-normalized concentrations in yellow perch at HR6 (which were significantly higher than the average); and (2) lipid-normalized concentrations in bluegill/pumpkinseed at all locations (which were significantly lower than the average).

Summary

Overall, the results of these statistical analyses confirm that PCB concentrations in YOY fish in the Housatonic River (on both a wet-weight and a lipid-normalized basis) have declined over time, as shown both by a trend in concentrations from 1994 through 2010 and by comparisons of concentrations before and after the upstream remediation.

2 Table 3 (rows labeled as Species) shows this by presenting the results of statistical analyses demonstrating that, after taking into account the temporal declines, the PCB concentrations in the individual species were not statistically significantly different from the average concentrations for all species at any location.


References

ARCADIS BBL. 2007. Field Sampling Plan/Quality Assurance Project Plan (FSP/QAPP), General Electric Company, Pittsfield, Massachusetts. Prepared for General Electric Company. March 30.

Belsley, D.A., E. Kuh and R.E. Welsch. 2004. Regression Diagnostics: Identifying Influential Data and Sources of Collinearity. Wiley-Interscience.

Blasland, Bouck & Lee, Inc (BBL). 1994. MCP Supplemental Phase II Scope of Work and Proposal for RCRA Facility Investigation of Housatonic River and Silver Lake. Prepared for General Electric Company. June.

Neter, J., W. Wasserman and M. Kutner. 1990. Applied Linear Statistical Models. 3rd Edition. CRC Press.


Tables

TABLE 1 2010 HOUSATONIC RIVER YOY FISH SAMPLE RESULTS

HOUSATONIC RIVER - REST OF RIVER GENERAL ELECTRIC COMPANY - PITTSFIELD, MASSACHUSETTS

Location Fish Species Sample ID

Date Collected

Number of Fish

Aroclor-1016, 1221, 1232, 1242,

1248 (mg/kg)

Aroclor-1254

(mg/kg)

Aroclor-1260

(mg/kg)

Total PCB

(mg/kg)

Percent Lipid (%)

Lipid-Normalized

PCB (mg/kg lipid)

HR2 Largemouth Bass HR2-LB-274 10/12/10 6 ND(5.0) 3.8 J 13 16.8 4.0 420 Largemouth Bass HR2-LB-275 10/12/10 6 ND(5.0) 4.5 J 15 19.5 3.6 542 Largemouth Bass HR2-LB-276 10/12/10 6 ND(5.0) 4.1 J 13 17.1 3.7 462 Largemouth Bass HR2-LB-277 10/12/10 6 ND(5.0) 4.2 J 15 19.2 3.2 600 Largemouth Bass HR2-LB-278 10/12/10 6 ND(5.0) 4.2 J 14 18.2 3.2 569 Largemouth Bass HR2-LB-279 10/12/10 6 ND(5.0) 4.3 J 14 18.3 3.4 538 Largemouth Bass HR2-LB-280 10/12/10 6 ND(5.0) 4.5 J 16 20.5 3.6 569 Yellow Perch HR2-YP-267 10/12/10 7 ND(5.0) 5.1 15 20.1 2.8 718 Yellow Perch HR2-YP-268 10/12/10 7 ND(5.0) 4.0 J 13 17.0 2.8 607 Yellow Perch HR2-YP-269 10/12/10 7 ND(5.0) 4.0 J 13 17.0 2.5 680 Yellow Perch HR2-YP-270 10/12/10 7 ND(5.0) 4.5 J 15 19.5 2.6 750 Yellow Perch HR2-YP-271 10/12/10 7 ND(5.0) 4.5 J 15 19.5 2.8 696 Yellow Perch HR2-YP-272 10/12/10 7 ND(5.0) 4.4 J 15 19.4 2.8 693 Yellow Perch HR2-YP-273 10/12/10 7 ND(5.0) 3.8 J 12 15.8 3.0 527 Bluegill HR2-BG-281 10/12/10 7 ND(6.2) 3.9 J 12 15.9 3.7 430 Bluegill HR2-BG-282 10/12/10 7 ND(6.3) 3.7 J 12 15.7 4.0 393 Bluegill HR2-BG-283 10/12/10 7 ND(6.5) 4.0 J 12 16.0 4.0 400 Bluegill HR2-BG-351 10/27/10 7 ND(2.9) 3.5 11 14.5 3.0 483 Bluegill HR2-BG-352 10/27/10 7 ND(3.1) 3.0 J 8.9 11.9 3.4 350 Bluegill HR2-BG-353 10/27/10 7 ND(2.9) 3.3 8.9 12.2 3.1 394 Bluegill HR2-BG-354 10/27/10 7 ND(2.7) 3.4 11 14.4 2.7 533 Woods Pond Largemouth Bass WP-LB-295 10/12/10 5 ND(5.0) 3.4 J 10 13.4 2.9 462 Largemouth Bass WP-LB-296 10/12/10 5 ND(5.0) 4.0 J 12 16.0 2.8 571 Largemouth Bass WP-LB-297 10/12/10 5 ND(5.0) 4.4 J 13 17.4 2.6 669 Largemouth Bass WP-LB-298 10/12/10 5 ND(5.0) 3.5 J 11 14.5 2.7 537 Largemouth Bass WP-LB-299 10/12/10 5 ND(5.0) 3.3 J 11 14.3 2.4 596 Largemouth Bass WP-LB-300 10/13/10 5 ND(5.0) 5.0 15 20.0 2.8 714 Largemouth Bass WP-LB-301 10/13/10 5 ND(5.0) 5.6 17 22.6 3.0 753 Yellow Perch WP-YP-302 10/12/10 5 ND(5.0) 4.2 J 13 17.2 2.5 688 Yellow Perch WP-YP-303 10/12/10 5 ND(5.0) 10 16 26.0 3.0 867 Yellow Perch WP-YP-304 10/12/10 5 ND(5.0) 3.9 J 14 17.9 2.5 716 Yellow Perch WP-YP-305 10/13/10 5 ND(2.5) 5.2 15 20.2 3.6 561 Yellow Perch WP-YP-306 10/13/10 5 ND(2.5) 5.9 17 22.9 2.9 790 Yellow Perch WP-YP-307 10/13/10 5 ND(2.5) 4.4 13 17.4 2.7 644 Yellow Perch WP-YP-308 10/13/10 5 ND(2.5) 4.7 14 18.7 3.0 623 Bluegill WP-BG-288 10/12/10 8 ND(5.1) 3.7 J 11 14.7 3.5 420 Bluegill WP-BG-289 10/12/10 8 ND(5.5) 3.7 J 10 13.7 3.1 442 Bluegill WP-BG-290 10/12/10 8 ND(5.0) 3.4 J 9.9 13.3 3.3 403 Bluegill WP-BG-291 10/12/10 8 ND(5.3) 3.5 J 10 13.5 3.3 409 Bluegill WP-BG-292 10/12/10 8 ND(3.3) 3.3 J 9.3 12.6 3.3 382 Bluegill WP-BG-293 10/12/10 8 ND(3.0) 3.2 8.8 12.0 2.8 429 Bluegill WP-BG-294 10/12/10 8 ND(3.3) 2.4 J 6.8 9.20 3.1 297

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TABLE 1 2010 HOUSATONIC RIVER YOY FISH SAMPLE RESULTS


Location Fish Species Sample ID

Date Collected

Number of Fish

Aroclor-1016, 1221, 1232, 1242,

1248 (mg/kg)

Aroclor-1254

(mg/kg)

Aroclor-1260

(mg/kg)

Total PCB

(mg/kg)

Percent Lipid (%)

Lipid-Normalized

PCB (mg/kg lipid)

Glendale Dam Largemouth Bass GD-LB-309 10/13/10 6 ND(1.0) 0.93 J 3.1 4.03 3.0 134 Largemouth Bass GD-LB-310 10/13/10 6 ND(1.0) 0.98 J 3.5 4.48 2.8 160 Largemouth Bass GD-LB-311 10/13/10 6 ND(1.0) 1.1 3.6 4.70 2.9 162 Largemouth Bass GD-LB-312 10/13/10 6 ND(1.0) 1.1 4.1 5.20 2.6 200 Largemouth Bass GD-LB-313 10/13/10 6 ND(1.0) 1.1 3.5 4.60 3.2 144 Largemouth Bass GD-LB-314 10/13/10 6 ND(1.0) 0.92 J 3.2 4.12 2.7 153 Largemouth Bass GD-LB-315 10/13/10 6 ND(1.0) 1.2 4.1 5.30 2.8 189 Yellow Perch GD-YP-316 10/13/10 3 ND(1.0) 0.74 J 2.7 3.44 1.9 181 Yellow Perch GD-YP-317 10/13/10 3 ND(1.0) 0.83 J 3.0 3.83 2.1 182 Yellow Perch GD-YP-318 10/13/10 3 ND(1.0) 1.0 3.7 4.70 2.5 188 Yellow Perch GD-YP-319 10/13/10 3 ND(1.0) 0.85 J 3.1 3.95 2.2 180 Yellow Perch GD-YP-320 10/13/10 3 ND(1.0) 1.0 3.6 4.60 2.7 170 Yellow Perch GD-YP-321 10/13/10 3 ND(1.0) 0.94 J 3.7 4.64 2.2 211 Yellow Perch GD-YP-322 10/13/10 3 ND(1.0) 0.84 J 2.9 3.74 2.4 156 Bluegill GD-BG-323 10/13/10 10 ND(1.2) 0.89 J 3.0 3.89 3.8 102 Bluegill GD-BG-324 10/13/10 10 ND(1.3) 0.92 J 3.3 4.22 3.8 111 Bluegill GD-BG-325 10/13/10 10 ND(1.3) 0.88 J 3.3 4.18 4.3 97.2 Bluegill GD-BG-326 10/13/10 10 ND(1.4) 0.86 J 3.1 3.96 4.0 99.0 Bluegill GD-BG-327 10/13/10 10 ND(1.3) 0.82 J 3.0 3.82 3.8 101 Bluegill GD-BG-328 10/13/10 10 ND(1.3) 0.81 J 2.9 3.71 3.8 97.6 Bluegill GD-BG-329 10/13/10 10 ND(1.4) 0.83 J 3.0 3.83 3.8 101 HR6 Largemouth Bass HR6-LB-330 10/14/10 5 ND(0.30) 0.20 J 0.88 1.08 2.0 54.0 Largemouth Bass HR6-LB-331 10/14/10 5 ND(0.53) 0.31 J 1.3 1.61 2.9 55.5 Largemouth Bass HR6-LB-332 10/14/10 5 ND(0.60) 0.36 J 1.6 1.96 2.9 67.6 Largemouth Bass HR6-LB-333 10/14/10 5 ND(0.28) 0.16 J 0.79 0.950 2.3 41.3 Largemouth Bass HR6-LB-334 10/14/10 5 ND(0.23) 0.16 J 0.65 0.810 2.1 38.6 Largemouth Bass HR6-LB-335 10/14/10 6 ND(0.56) 0.36 J 1.5 1.86 3.0 62.0 Largemouth Bass HR6-LB-336 10/14/10 6 ND(0.50) 0.26 J 1.1 1.36 2.8 48.6 Yellow Perch HR6-YP-337 10/14/10 6 ND(1.0) 0.45 J 2.1 2.55 2.3 111 Yellow Perch HR6-YP-338 10/14/10 6 ND(1.0) 0.47 J 2.0 2.47 2.2 112 Yellow Perch HR6-YP-339 10/14/10 6 ND(1.0) 0.44 J 2.0 2.44 3.0 81.3 Yellow Perch HR6-YP-340 10/14/10 6 ND(1.0) ND(1.0) 2.0 2.00 2.4 83.3 Yellow Perch HR6-YP-341 10/14/10 6 ND(1.0) 0.44 J 1.9 2.34 2.6 90.0 Yellow Perch HR6-YP-342 10/14/10 6 ND(0.50) J 0.44 J 1.8 J 2.24 J 2.6 86.2 Yellow Perch HR6-YP-343 10/14/10 6 ND(0.50) J 0.50 J 2.1 J 2.60 J 2.4 108 Bluegill HR6-BG-344 10/14/10 13 ND(0.28) J 0.37 J 1.3 J 1.67 J 3.6 46.4 Bluegill HR6-BG-345 10/14/10 13 ND(0.27) J 0.29 J 1.1 J 1.39 J 2.9 47.9 Bluegill HR6-BG-346 10/14/10 13 ND(0.30) J 0.31 J 1.2 J 1.51 J 3.4 44.4 Bluegill HR6-BG-347 10/14/10 13 ND(0.34) J 0.44 J 1.7 J 2.14 J 3.4 62.9 Bluegill HR6-BG-348 10/14/10 13 ND(0.64) J 0.29 J 1.3 J 1.59 J 3.2 49.7 Bluegill HR6-BG-349 10/14/10 13 ND(0.60) J 0.31 J 1.2 J 1.51 J 3.2 47.2 Bluegill HR6-BG-350 10/14/10 13 ND(0.67) J 0.31 J 1.2 J 1.51 J 3.4 44.4

Notes: 1. Samples were collected by ARCADIS and submitted to Pace Analytical Services, Inc. for analysis of PCBs and % Lipids. 2. Data have been validated as per Field Sampling Plan/Quality Assurance Project Plan (FSP/QAPP), General Electric Company, Pittsfield, Massachu

(approved March 15, 2007 and resubmitted March 30, 2007). YOY - young of year cm - centimeter g - gram

mg/kg - milligram per kilogram (ppm - parts per million) mg/kg lipid - Total PCB divided by percent lipid times 100 (ppm - parts per million). ND - Analyte was not detected. The number in parantheses is the associated detection limit.

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TABLE 2 COMPARISON OF 1994-2010 HOUSATONIC RIVER YOY FISH MEAN PCB RESULTS


Location Fish Species

Year n Lipid (%)

Total PCB (mg/kg)

Lipid-Normalized PCB (mg/kg lipid)

HR2 Largemouth Bass

1994 7 1996 7 1998 7 2000 7 2002 7 2004 7 2006 5 2008 7 2010 7

Yellow Perch 1994 7 1996 7 1998 7 2000 7 2002 4 2004 7 2006 0 2008 7 2010 7

Bluegill/Pumpkinseed 1994 7 1996 7 1998 7 2000 7 2002 7 2004 7 2006 7 2008 7 2010 7

2.8 (0.2) 2.9 (0.3) 3.0 (0.2) 3.0 (1.0) 3.6 (0.2) 3.2 (0.2) 2.5 (0.5) 2.7 (0.2) 3.5 (0.3)

2.5 (0.1) 3.2 (0.3) 2.8 (0.2) 2.8 (0.3) 2.3 (0.5) 2.6 (0.2) ---- ----2.1 (0.4) 2.8 (0.2)

3.8 (0.5) 3.5 (0.2) 3.1 (0.2) 4.2 (0.3) 3.0 (0.4) 4.0 (0.3) 2.9 (0.1) 3.1 (0.3) 3.4 (0.5)

31 (3.4) 28 (5.4) 19 (1.1) 32 (6.2) 21 (1.8) 20 (5.3) 21 (2.6) 17 (2.9) 19 (1.3)

25 (1.6) 27 (4.0) 26 (4.2) 33 (3.1) 25 (2.2) 31 (3.7) ---- ----16 (5.2) 18 (1.7)

25 (1.4) 29 (1.3) 21 (8.6) 33 (4.6) 13 (3.4) 19 (2.7) 13 (1.4)

8.2 (0.7) 14 (1.7)

1131 (145) 956 (152) 651 (72)

1161 (374) 593 (67) 614 (186) 872 (136) 628 (94) 529 (64)

999 (88) 848 (83) 939 (217)

1193 (67) 1105 (176) 1188 (89)

---- ----757 (265) 667 (76)

665 (77) 839 (63) 698 (309) 791 (106) 442 (73) 463 (61) 442 (32) 268 (29) 426 (63)

WOODS POND Largemouth Bass

1994 7 1996 7 1998 7 2000 7 2002 7 2004 7 2006 7 2008 7 2010 7

Yellow Perch 1994 7 1996 7 1998 7 2000 7 2002 2 2004 7 2006 7 2008 7 2010 7


2.1 (0.5) 3.2 (0.2) 2.5 (0.3) 2.6 (0.2) 2.7 (0.2) 3.3 (0.4) 2.5 (0.3) 2.0 (0.2) 2.7 (0.2)

2.5 (0.7) 4.4 (0.4) 2.4 (0.2) 3.3 (0.3) 2.3 (0.1) 3.4 (0.1) 2.8 (0.3) 2.6 (0.3) 2.9 (0.4)

2.8 (1.0) 3.9 (0.4) 2.8 (0.4) 4.6 (0.2) 4.5 (0.3) 3.4 (0.1) 3.7 (0.2) 2.7 (0.5) 3.2 (0.2)

23 (8.1) 22 (2.0) 32 (4.6) 24 (2.4) 17 (1.3) 31 (3.9) 32 (2.7) 21 (3.9) 17 (3.4)

38 (9.3) 29 (3.1) 29 (4.4) 30 (2.0) 14 (2.8) 29 (2.8) 25 (2.4) 20 (7.9) 20 (3.3)

17 (6.4) 22 (2.3) 17 (2.1) 28 (3.3) 15 (1.5) 17 (1.0) 18 (1.4) 12 (2.1) 13 (1.8)

1178 (444) 690 (63)

1323 (200) 913 (73) 618 (40) 928 (76)

1297 (249) 1074 (249)

615 (103)

1836 (1574) 663 (23)

1235 (226) 933 (109) 604 (94) 841 (66) 897 (102) 765 (248) 699 (104)

601 (37) 563 (79) 622 (178) 600 (63) 328 (45) 497 (21) 498 (48) 450 (30) 397 (48)

G:\GE\GE_Housatonic_Rest_of_River\Reports and Presentations\2010 YOY FISH\Revised 1961111222_Table 2 - 1994-2010 Mean Data.xls Page 1 of 3 9/15/2011



Location Species

Year n Lipid (%)

Total PCB (mg/kg)


GLENDALE DAM Largemouth Bass

1996 7 1998 7 2000 7 2002 7 2004 7 2006 7 2008 7 2010 7

Yellow Perch 1996 7 1998 7 2000 7 2002 0 2004 7 2006 0 2008 7 2010 7

Bluegill/Pumpkinseed 1996 7 1998 8 2000 7 2002 7 2004 7 2006 7 2008 7 2010 7

3.0 (0.2) 2.7 (0.2) 3.9 (0.2) 2.9 (0.3) 3.4 (0.1) 2.6 (0.2) 2.5 (0.1) 2.9 (0.2)

3.4 (0.3) 2.8 (0.3) 3.2 (0.2) ---- ----3.4 (0.5) ---- ----2.5 (0.5) 2.3 (0.3)

4.1 (0.2) 2.6 (1.1) 4.9 (0.5) 3.8 (0.4) 4.7 (0.4) 3.6 (1.2) 2.8 (0.3) 3.9 (0.2)

7.9 (0.9) 5.2 (1.3) 16 (1.0)

3.6 (0.4) 6.8 (0.7) 6.1 (0.8) 5.7 (1.1) 4.6 (0.5)

11 (1.7) 11 (1.4) 15 (1.0) ---- ----14 (4.7) ---- ----7.2 (1.9) 4.1 (0.5)

8.4 (1.2) 2.3 (0.6) 16 (2.1)

3.2 (0.7) 6.0 (0.2) 5.6 (2.3) 3.1 (0.3) 3.9 (0.2)

265 (29) 198 (58) 399 (36) 122 (8) 198 (25) 234 (25) 231 (42) 163 (24)

323 (37) 382 (43) 460 (20) ---- ----

401 (112) ---- ----

293 (48) 181 (17)

205 (23) 108 (75) 317 (37)

83 (13) 129 (8) 150 (16) 112 (9) 101 (5)

HR6 Largemouth Bass

1994 7 1996 7 1998 7 2000 7 2002 7 2004 7 2006 7 2008 7 2010 7

Yellow Perch 1994 7 1996 7 1998 7 2000 7 2002 4 2004 7 2006 7 2008 7 2010 7


3.2 (0.2) 3.6 (0.3) 3.0 (0.3) 3.2 (0.3) 2.9 (0.1) 3.1 (0.3) 3.2 (1.2) 2.6 (0.7) 2.6 (0.4)

2.8 (0.2) 2.6 (0.2) 2.5 (0.2) 2.6 (0.2) 2.4 (0.4) 2.5 (0.2) 2.7 (0.4) 2.1 (0.2) 2.5 (0.3)

4.2 (0.4) 3.7 (0.2) 3.8 (0.6) 3.7 (0.4) 3.0 (0.6) 3.7 (0.3) 3.4 (0.2) 3.7 (0.4) 3.3 (0.2)

4.3 (0.5) 3.4 (0.3) 2.5 (0.4) 3.4 (0.6) 1.9 (0.1) 2.6 (0.8) 2.8 (1.2) 2.1 (0.4) 1.4 (0.5)

4.5 (0.2) 3.3 (0.2) 3.2 (0.7) 4.1 (0.6) 2.5 (0.2) 4.4 (0.7) 3.1 (1.4) 2.6 (0.7) 2.4 (0.2)

3.5 (0.5) 1.5 (0.6) 2.1 (0.7) 3.9 (0.6) 1.9 (0.3) 2.9 (0.9) 3.0 (0.6) 2.3 (0.3) 1.6 (0.2)

136 (20) 95 (8) 83 (17)

108 (24) 66 (4) 84 (32) 85 (22) 84 (17) 53 (11)

158 (13) 128 (20) 131 (34) 153 (18) 104 (13) 179 (29) 115 (47) 122 (27)

96 (14)

83 (10) 41 (15) 55 (11)

106 (19) 65 (15) 77 (21) 90 (15) 63 (6) 49 (6)




Notes: 1. PCB data are reported as wet-weight arithmetic mean concentrations. Standard deviation is provided in

parentheses. Calculations were performed on whole-body composite results. 2. Total PCBs represented by Aroclors 1254 and 1260. 3. Pumpkinseed sunfish were collected as a substitute species for bluegill when bluegill sunfish were not available. 4. Glendale Dam was not sampled in 1994; it was added to the sampling program in 1996. YOY - young of year n - number of samples mg/kg - milligram per kilogram (ppm - parts per million) mg/kg lipid - Total PCB divided by percent lipid times 100 (ppm - parts per million) ---- - no fish collected (fish of the correct species/size were not available at the time of collection)


TABLE 3

YOY FISH PCB CONCENTRATION TRENDS THROUGH TIME (1994-2010)

HOUSATONIC RIVER - REST OF RIVER

GENERAL ELECTRIC COMPANY - PITTSFIELD, MASSACHUSETTS

Location Effect

Total PCB (mg/kg)


Name Level Estimate d.f. p-Value Estimate d.f. p-Value HR2 Overall Model Y-Intercept 29.090 2 0.003 960.327 2 0.014

Overall Model Slope (Year) -0.835 173 0.000 -24.783 173 0.000 Species Difference Largemouth Bass 0.495 173 0.752 24.377 173 0.827 Species Difference Yellow Perch 2.110 173 0.181 174.644 173 0.119 Species Difference Bluegill/Pumpkinseed -2.606 173 0.097 -199.021 173 0.076

Woods Pond Overall Model Y-Intercept 26.963 2 0.011 901.535 2 0.025 Overall Model Slope (Year) -0.503 180 0.000 -14.329 179 0.000 Species Difference Largemouth Bass 1.333 180 0.637 170.072 179 0.240 Species Difference Yellow Perch 3.900 180 0.169 106.565 179 0.462 Species Difference Bluegill/Pumpkinseed -5.232 180 0.065 -276.636 179 0.057

Glendale Dam Overall Model Y-Intercept 10.545 2 0.014 305.761 2 0.028 Overall Model Slope (Year) -0.345 149 0.000 -7.861 150 0.000 Species Difference Largemouth Bass -0.476 149 0.683 -8.519 150 0.867 Species Difference Yellow Perch 2.126 149 0.072 93.186 150 0.070 Species Difference Bluegill/Pumpkinseed -1.651 149 0.158 -84.667 150 0.098

HR6 Overall Model Y-Intercept 3.575 2 0.006 113.252 2 0.026 Overall Model Slope (Year) -0.086 181 0.000 -1.962 181 0.000 Species Difference Largemouth Bass -0.171 181 0.505 -9.164 181 0.620 Species Difference Yellow Perch 0.461 181 0.073 35.190 181 0.058 Species Difference Bluegill/Pumpkinseed -0.290 181 0.258 -26.025 181 0.161

Notes: 1. Significance of test; values shown as "0.000" are p < 0.0005; p < 0.05 is shown in bold 2. Slope for individual species fixed at overall model slope 3. Species level effect Difference = the average PCB concentration increase or decrease from the overal model across all years 4. One outlier each was removed from 2 of 8 tests:

- Test = Woods Pond Lipid-Normalized PCBs. Outlier removed = 1994 yellow perch 5370 mg/kg lipid - Test = Glendale Dam Total PCBs. Outlier removed = 2004 yellow perch 23.7 mg/kg

mg/kg - milligram/kilogram mg/kg lipid - milligram/kilogram lipid df - degrees of freedom

9/13/2011 1961111222_Tables 3 to 4 - Statistical Output.xlsx Page 1 of 1

TABLE 4

YOY FISH PCB CONCENTRATION DIFFERENCES PRE- AND POST-REMEDIATION (1994 and 1996 vs. 2008 and 2010)

HOUSATONIC RIVER - REST OF RIVER

GENERAL ELECTRIC COMPANY - PITTSFIELD, MASSACHUSETTS

Location Effect

Total PCB (mg/kg)


Name Level Estimate d.f. p-Value Estimate d.f. p-Value HR2 Overall Model Y-Intercept 27.524 2 0.002 906.276 2 0.006

Overall Model Remediation After -12.183 79 0.000 -377.277 80 0.000 Overall Model Remediation Before 0.000 0.000 Species Difference Largemouth Bass 1.727 79 0.108 89.760 80 0.204 Species Difference Yellow Perch 0.135 79 0.899 72.293 80 0.306 Species Difference Bluegill/Pumpkinseed -1.862 79 0.084 -162.052 80 0.023

Woods Pond Overall Model Y-Intercept 24.776 2 0.007 815.151 2 0.015 Overall Model Remediation After -8.030 77 0.000 -148.579 79 0.009 Overall Model Remediation Before 0.000 0.000 Species Difference Largemouth Bass -0.023 77 0.991 136.571 79 0.183 Species Difference Yellow Perch 3.963 77 0.054 82.718 79 0.418 Species Difference Bluegill/Pumpkinseed -3.940 77 0.055 -219.289 79 0.034

Glendale Dam Overall Model Y-Intercept 8.915 2 0.003 264.339 2 0.012 Overall Model Remediation After -4.273 57 0.000 -87.548 58 0.000 Overall Model Remediation Before 0.000 0.000 Species Difference Largemouth Bass 0.027 57 0.953 13.382 58 0.647 Species Difference Yellow Perch 0.804 57 0.082 51.253 58 0.084 Species Difference Bluegill/Pumpkinseed -0.831 57 0.072 -64.635 58 0.030

HR6 Overall Model Y-Intercept 3.412 2 0.005 106.920 2 0.022 Overall Model Remediation After -1.348 80 0.000 -29.160 80 0.000 Overall Model Remediation Before 0.000 0.000 Species Difference Largemouth Bass 0.044 80 0.853 -0.375 80 0.981 Species Difference Yellow Perch 0.392 80 0.102 32.813 80 0.043 Species Difference Bluegill/Pumpkinseed -0.436 80 0.070 -32.438 80 0.046

Notes: 1. Significance of test; values shown as "0.000" are p < 0.0005; p < 0.05 is shown in bold 2. Slope for individual species fixed at overall model slope 3. Species level effect Difference = the average PCB concentration increase or decrease from the overal model before and after remediation 4. Pre to post remediation timeframe was 1994 and 1996 to 2008 and 2010 for all locations except Glendale Dam which was 1996 to 2008 and 2010 (Glendale Dam was not sampled in 1994) 5. One to three outliers each were removed from 5 of 8 tests:

- Test = HR2 Total PCB. Outlier = 2008 yellow perch 26 mg/kg - Test = Woods Pond Total PCB. Outliers = 1994 yellow perch 58 mg/kg, 1994 bluegill/pumpkinseed 3.3 mg/kg, and 2008 yellow perch 37 mg/kg - Test = Woods Pond Lipid-Normalized PCB. Outlier removed = 1994 yellow perch 5370 mg/kg lipid - Test = Glendale Dam Total PCB. Outliers removed = 1996 yellow perch 14 mg/kg and 2008 yellow perch 11.2 mg/kg - Test = Glendale Dam Lipid-Normalized PCB. Outlier removed = 2008 yellow perch 373 mg/kg lipid

vs - versus mg/kg - milligram/kilogram mg/kg lipid - milligram/kilogram lipid df - degrees of freedom

1961111222_Tables 3 to 4 - Statistical Output.xlsx Page 1 of 1 9/13/2011

Figures

GE FACILITY

Massachusetts

Connecticut

09/0

8/2

011

S

YR

AC

US

E-N

Y-1

41E

NV

-D85-D

JHO

WE

S

C:/B

0020199/0

000/0

0021/C

DR

/20199N

01.C

DR

GLENDALE DAM

HR2

HR6

WOODS POND

GENERAL ELECTRIC COMPANY, PITTSFIELD, MASSACHUSETTS

NOTES:

1. Base map prepared using Pittsfield, Mass.-New York-Conn.

30x60 USGS Quad. 1986 PI 1989.

2. Sampling locations are approximate.

APPROXIMATE SCALE: 1" = 2 MILES

0 2 MILES 2 MILES

LEGEND:

= Sampling Location

YOY FISH SAMPLING LOCATIONS

FIGURE

1

Tota

l PC

B (m

g/kg

)

50.0

40.0

30.0

20.0

10.0

0.0

50.0

40.0

30.0

20.0

10.0

0.0

50.0

40.0

30.0

20.0

10.0

0.0

7 7

7

7

7 7 5

7 7

7

7

7

7

7

7 7

7

7

7 7

7

7 7 7 7 7 7 7 7 7

7 7 7 7 7

Largemouth Bass

7 Yellow Perch

7 7

7 7 7 7 7 7

7 4

7 7 2

7 7 7

7 7 7 7

7 7 7 7 7 7

4 7 7 7 7

7

7 7

7

7

7

7

7

7

7 7

7

7

7 7 7

7 7

Bluegill/Pumpkinseed

7

8

7

7 7 7

7 7 7 7 5 8

7 7 7 7 7

g p

1994

1996

1998

2000

2002

2004

2006

2008

2010

1994

1996

1998

2000

2002

2004

2006

2008

2010

1994

1996

1998

2000

2002

2004

2006

2008

2010

1994

1996

1998

2000

2002

2004

2006

2008

2010

HR2 Woods Pond

Notes: 1. PCB - polychlorinated biphenyl 2. mg/kg - milligram/kilogram 3. Presents all young-of-year data collected by ARCADIS in 1994, 1996, 1998, 2000, 2002, 2004, 2006, 2008 and 2010. 4. Arithmetic means. Error bars represent +/- 2 standard errors. Number of samples is indicated.

Glendale HR6 Dam


SPATIAL DISTRIBUTION OF MEAN PCB LEVELS IN YOUNG-OF-YEAR FISH TISSUE (WET-WEIGHT)

FIGURE

G:\GE\GE_Housatonic_Rest_of_River\Reports and Presentations\2010 YOY FISH\1961111222_Figures 2 to 3 - Spatial Trend Plots.xlsx

2


2000

1600

1200

800

400

0

7

7

7

7

7 7

5

7 7

7

7

7

7

7

7

7

7

7

7 7

7

7 7 7 7

7 7 7 7 7 7 7 7 7 7

Largemouth Bass

Lipi

d-N

orm

aliz

ed P

CB

(mg/

kg li

pid)

72000

1600

7 7

7 7 4 7

7

7 7

7

7

2 7

7 7

7

7 7 7 7 7

7 7 7 7 7 4 7 7 7 7


Yellow Perch

7 7 7 7

7 7 7

7

7 7 7

7 7

7 7 7 7 7

7 8

7

7 7 7 7 7 7 7 5 8 7 7 7 7 7

1200

800

400

0

2000

1600

1200

800

400

0

1994

1996

1998

2000

2002

2004

2006

2008

2010

1994

1996

1998

2000

2002

2004

2006

2008

2010

1994

1996

1998

2000

2002

2004

2006

2008

2010

1994

1996

1998

2000

2002

2004

2006

2008

2010

HR2 Woods Pond


Glendale HR6 Dam


SPATIAL DISTRIBUTION OF MEAN PCB LEVELS IN YOUNG-OF-YEAR FISH TISSUE (LIPID-NORMALIZED)

FIGURE

G:\GE\GE_Housatonic_Rest_of_River\Reports and Presentations\2010 YOY FISH\1961111222_Figures 2 to 3 - Spatial Trend Plots.xlsx

3

Notes: 1. PCB - polychlorinated biphenyl 2. mg/kg - milligram/kilogram 3. Presents all young-of-year data collected by ARCADIS in 1994, 1996, 1998, 2000, 2002, 2004, 2006, 2008 and 2010. 4. Arithmetic means. Error bars represent +/- 2 standard errors. Number of samples is FIGURE indicated.

G:\GE\GE_Housatonic_Rest_of_River\Reports and Presentations\2010 YOY FISH\1961111222_Figures 4 to 7 - Temporal Trend Plots.xlsx

Tota

l PC

B (m

g/kg

)

7

7 7

7

7

7

7

7

7

5

10

15

20

25

30

35

40

HR2 ‐ Bluegill/Pumpkinseed

1010

15

20

25

30

35

40

HR2 ‐ Yellow Perch

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1992

1994

1996

1998

2000

1992

1994

1996

1998

2000

2002

2002

2004

2006

2004

2006

7

7 7

7

4

7

7 7

2008

2008

2010

2010

2012

20

12

2012

Lipi

d-N

orm

aliz

ed P

CB

(mg/

kg li

pid)

HR2 ‐ Bluegill/Pumpkinseed 1000

450450

600

750

900

1050

1200

1350

200

300

400

500

600

700

800

900

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

7 7

7

7

7 7 77

7

1992

1994

1996

1998

2000


1992

1994

2006

7

7

7

7 4 7

7

7

1996

1998

2000

2002

2002

2004

2006

2004

2008

2008

2010

2010

2012

2012

20

12

15 600

10 400

25

20

30 1200

7 7

7

7 7 5

7 7

Year

1000

800


TEMPORAL DISTRIBUTION OF MEAN PCB LEVELS IN YOUNG-OF-YEAR FISH TISSUE

7

7

7 5

77

7 7

7

HR2 ‐ Largemouth Bass HR2 ‐ Largemouth Bass 40 1600

7 35 1400

4

Tota

l PC

B (m

g/kg

)

15

20

25

10

15

20

25

30

35

40

45

50

19992

19

92

35

30

25

20

Year


Notes: 1. PCB - polychlorinated biphenyl TEMPORAL DISTRIBUTION OF MEAN PCB LEVELS IN 2. mg/kg - milligram/kilogram

YOUNG-OF-YEAR FISH TISSUE 3. Presents all young-of-year data collected by ARCADIS in 1994, 1996, 1998, 2000, 2002, 2004, 2006, 2008 and 2010. 4. Arithmetic means. Error bars represent +/- 2 standard errors. Number of samples is indicated.


15 600

10 400

7

7

7

7

7

7 7

7

7

1400

1200

1000

800

40 1600

Woods Pond ‐ Largemouth Bass Woods Pond ‐ Largemouth Bass

7

7

7

7

7

7

7

7

7

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

10 300

5 200

30 700

7 7

7

7

7 7

7

7 7 400

500

600

1992

1994

1996

1998

2000

2002

2004

35 800

Woods Pond ‐ Bluegill/Pumpkinseed Woods Pond ‐ Bluegill/Pumpkinseed

7

7 7 7

2

7

7 7 7

Woods Pond ‐ Yellow Perch

1994

1996

1998

2000

2002

2004

2006

2008

2010

19994

19996

19998

20000

20002

20004

20006

20008

20110

2012

20

112

2012

LLipi

d-N

orm

aliz

ed P

CB

(mg/

kg li

pid)

400

600

800

1000

1200

1400

1600

1800

2000

7 7

7

7

7

7 7

7 7

Woods Pond ‐ Yellow Perch 7

19992

19994

19996

19998

20000

20002

20004

20006

20008

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

7

7

7

2

7 7 7

7

2006

2008

2010

20110

2012

20

112

2012

FIGURE 5

7

8 7

7 7

7 7

Glendale Dam ‐ Largemouth Bass Glendale Dam ‐ Largemouth Bass 18 450

Tota

l PC

B (m

g/kg

)

502

0 0

2

4

10

8

6

16

14

12

18

4

6

8

10

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

7

16 350

14 300 12

250

18

Glendale Dam ‐ Bluegill/Pumpkinseed Glendale Dam ‐ Bluegill/Pumpkinseed

1992

1994

1996

1998

2000

2002

2004

Glendale Dam ‐ Yellow Perch

1992

1994

1996

1998

2000

2002

2004

7 7

7

7

7

7

2006

2006

2008

2010

2008

2010

2012

20

1220

12

Lipi

d-N

orm

aliz

ed P

CB

(mg/

kg li

pid)

100

150

200

400

100

200

300

400

500

600

Glendale Dam ‐ Yellow Perch

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1992

1994

1996

1998

2000

2002

2004

2006

7

8

7

7

7 7

7 7

7

7

7 7

7

7

2008

2010

2012

2012

20

12

2 100

8

6

4

16 400

14 350

12 300

10 7

7

7

7

7 7 7

7

Year


TEMPORAL DISTRIBUTION OF MEAN PCB LEVELS IN YOUNG-OF-YEAR FISH TISSUE

250

200

150

7

7

7

7

7

7 7

7


FIGURE


6

7

7

7

7

4

7

7

7Tota

l PC

B (m

g/kg

)

2.0

3.0

2.5

4.0

4.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

1992

1992

19922

5

4

3

2

1994

1996

1998

2000

2002

2004

2006

2008

2010

40 1.5

1.0 20

3.5

80

7

7

5

8

7

7 7

7

7

80

1 60

0 40

7

HR6 ‐ Bluegill/Pumpkinseed HR6 ‐ Bluegill/Pumpkinseed

19944

19966

19988

20000


1994

1996

1998

2000

20022

2002

20044

2004

2006

20066

2008

20088

2010

20100

2012

2012

20

122

LLipi

d-N

orm

aliz

ed P

CB

(mg/

kg li

pid)

100

120

60

75

100

125

150

175

200

7

7

7 7

4

7 7

7

HR6 ‐ Yellow Perch 7

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

7

7

5

7

7 7

7

7

8

19922

19944

19966

19988

20000

20022

20044

20066

20088

20100

HR6 ‐ Largemouth Bass HR6 ‐ Largemouth Bass 7

7

7

7

7

7

7

7

7

160

140

120

100

7

7 7

7

7

7 7

7

7

Year


Notes: 1. PCB - polychlorinated biphenyl 2. mg/kg - milligram/kilogram

TEMPORAL DISTRIBUTION OF MEAN PCB LEVELS IN 3. Presents all young-of-year data collected by ARCADIS in 1994, 1996, 1998, 2000, 2002, 2004, 2006, 2008 and 2010. YOUNG-OF-YEAR FISH TISSUE 4. Arithmetic means. Error bars represent +/- 2 standard errors. Number of samples is indicated.

FIGURE


2012

20

122

2012

7

HR2 ‐ Total PCBs

y = ‐0.835x + 29.090 Total PCBs decrease over time at P < 0.05

50

45

40

1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

Total PCB

(mg/kg) 35

30

25

20

15

10

5

0

Largemouth Bass Yellow Perch Bluegill/Pumpkinseed

Year

HR2 ‐ Lipid‐Normalized PCBs

y = ‐24.783x + 960.327 Lipid‐Normalized PCBs decrease over time at P < 0.05

16001600

Lipid‐Normalized

PCB

(mg/kg

lipid)

1400

1200

1000

800

600

400

200

0

1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

Year Largemouth Bass Yellow Perch Bluegill/Pumpkinseed


Notes: 1. PCB - polychlorinated biphenyl 2. mg/kg - milligram/kilogram STATISTICAL MODEL OF TEMPORAL TRENDS IN PCB 3. Presents all young-of-year data collected by ARCADIS in 1994, 1996, 1998, 2000, 2002, 2004, 2006, 2008 and 2010. LEVELS IN YOUNG-OF-YEAR FISH TISSUE 4. Arithmetic means. Each symbol typically represents 7 samples.

FIGURE

G:\GE\GE_Housatonic_Rest_of_River\Reports and Presentations\2010 YOY FISH\1961111222_Figures 8 to 11 - Statistic Model Plots.xlsx

8

Woods Pond ‐ Total PCBs


50

45

40

1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

Total PCB

(mg/kg) 35

30

25

20

15

10

5

0


Year

Woods Pond ‐ Lipid‐Normalized PCBs


20002000

Lipid‐Normalized

PCB

(mg/kg

lipid)

1800

1600

1400

1200

1000

800

600

400

200

0

1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012



Notes: 1. PCB - polychlorinated biphenyl 2. mg/kg - milligram/kilogram STATISTICAL MODEL OF TEMPORAL TRENDS IN PCB 3. Presents all young-of-year data collected by ARCADIS in 1994, 1996, LEVELS IN YOUNG-OF-YEAR FISH TISSUE 1998, 2000, 2002, 2004, 2006, 2008 and 2010. 4. Arithmetic means. Each symbol typically represents 7 samples.

FIGURE


9

Glendale Dam ‐ Total PCBs


24

21

18

1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

Total PCB

(mg/kg)

15

12

9

6

3

0


Year

Glendale Dam ‐ Lipid‐Normalized PCBs


800800

Lipid‐Normalized

PCB

(mg/kg

lipid)

700

600

500

400

300

200

100

0

1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012




FIGURE


10

HR6 ‐ Total PCBs


8

7

6

1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

Total PCB

(mg/kg)

5

4

3

2

1

0


Year

HR6 ‐ Lipid‐Normalized PCBs


270

Lipid‐Normalized

PCB

(mg/kg

lipid)

240

210

180

150

120

90

60

30

0

1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012




FIGURE


11

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