01 99 90 1 WDNR Disposal Approval Request.pdf

February 22, 2016 Project Reference #14421

Mr. Gerry DeMers Mr. Binyoti Amungwafor

Wisconsin Dept. of Natural Resources Wisconsin Dept. of Natural Resources

2300 N. Martin Luther King Jr. Drive 2300 N. Martin Luther King Jr. Drive

Milwaukee, WI 53212 Milwaukee, WI 53212

RE: Low Hazard Exemption and Ch. NR 718.12 Soil Management Approval Request

Underwood Creek – I 94 to Hansen Golf Course to

Former Lakefield Sand & Gravel Property

7003 West Good Hope Road, Milwaukee, Wisconsin

WDNR BRRTS No. 02-41-548828 FID No. 241377070

Dear Messrs. DeMeers and Amungwafor:

This letter has been prepared to request Wisconsin Department of Natural Resources (WDNR) approval to place low level impacted sediment from the Underwood Creek project at the former

Lakefield Sand and Gravel property. The Lakefield Sand and Gravel property is a WDNR Remediation and Redevelopment site owned by SWP Properties, LLC.

Project Summary

The United States Army Corp of Engineers and Milwaukee Metropolitan Sewerage District (MMSD) propose to restore a ¾-mile section of Underwood Creek starting just west of the Hwy 45 crossing east downstream to the point at which the creek joins the Menomonee River adjacent to Hansen

Golf Course (Figure 1).

Property Location:

NW and NE ¼ of Section 20 Township 7 North Range 21 East

Requestor:

Milwaukee Metropolitan Sewerage District

Contact: Rebecca Specht

260 Seeboth Street

Milwaukee, WI 53204

414-225-2162 rspecht@mmsd.com

Consultant:

The Sigma Group Inc.

Kristin Kurzka, P.E.

1300 W. Canal Street

Milwaukee, WI 53223

414-643-4127 kurzka@thesigmagroup.com

The creek was channeled with the creek bed and banks lined with concrete in the early 1960s.

Currently, the creek channel gently slopes from west to east and is bordered by a residential neighborhood to the north and Canadian Pacific Rail corridor to the south. Within this section normal/typical active flow within the channel of the creek is generally 10 feet wide and 1 to 2.5 feet in depth but flashes to depths of 5 to 10 feet during storm events. The banks of the creek generally range from 2 to 1 slopes on the west end to steep 4 to 1 slopes on the east end. A total of four drop structures are present within the project area ranging in height from 1.75 to 4 feet.

Two storm sewer outfalls servicing I45 on the west end and the Mayfair Shopping Center parking lot near the center of the project area, discharge to the creek. The creek layout with the drop structures and outfalls is presented as Figure 2.

mailto:rspecht@mmsd.com mailto:kurzka@thesigmagroup.com

Underwood Creek Low Hazard/Ch. NR 718 Request

February 22, 2016

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The proposed creek restoration includes the removal of the existing concrete liner, re-grading of the adjacent creek banks (excluding the concrete banks beneath I45) and re-construction of portions of the project area with wetlands. Based on the current design the proposed earthwork activities will require the removal of an estimated 39,000 cubic yards of soil. The soil to be removed from the creek bed and adjacent bank is present at depths ranging from 3 to 6 feet below the existing concrete and may extend in width approximately from 70 to 120 feet.

A sediment sampling plan for purposes of characterizing the material proposed for placement at

Lakefield Sand and Gravel was submitted to the WDNR on July 6, 2015 and approved by the

WDNR in an email correspondence dated July 13, 2015. Additional sampling was completed on

January 25, 2016, as discussed with the WDNR, to further evaluate sediment quality near select soil brings. Details regarding the sediment sampling activities are summarized below.

UNDERWOOD CREEK SEDIMENT CHARACTERIZATION

Between October 30 and 31, 2015 and on January 25, 2016 the sediment sampling was completed in accordance with the July 2015 WDNR approved plan with one minor modification due to accessibility limitations. Specifically, soil boring GP-7 was moved 7½ feet to the south due to the presence of a large tree and poor sample recovery due to the granular nature of the soil at soil boring GP-3. The details of the sampling activities are as follows:

Soil Boring Advancement

The soil borings were advanced with a Geoprobe unit designed to retrieve a soil sample from a desired depth interval. The Geoprobe was equipped with a two inch diameter hollow stem probe rod equipped with a clean disposable polyethylene plastic liner dedicated to each soil sample. The sampling rods were decontaminated to prevent cross-contamination between the sampling intervals and each borehole. The sampling procedure was repeated at two-foot continuous depth intervals until the end of each boring.

During soil boring advancement, soil samples were collected on a continuous basis and described on the basis of color, texture, grain size, and plasticity, and classified in accordance with the Unified Soil

Classification System (USCS). Soil samples were also screened in the field using a photoionization detector (PID) calibrated for direct response to isobutylene in air. The soil descriptions and field screening results were recorded on the soil boring logs provided in Attachment A.

A total of 29 soil borings were completed with 59 soil samples, a minimum of two from each soil boring, collected. The soil boring locations were selected based on access which is limited by physical constraints including the existing I45 overpass, vegetation, steep side slopes, and three drop structures. The soil boring locations were also selected to best represent soil conditions proposed for excavation from the project area, including soil quality adjacent to and downstream of the two storm water outfalls. The soil boring locations are shown on Figure 2.

Soil samples collected from soil borings GP-1 through GP-18 (with the exception of the soil samples collected from soil boring GP-3 from 0 to 2 and 4 to 6 feet bgs) were submitted to the project laboratory for the following analysis:

Volatile organic compounds (VOCs) by EPA Method 8260 – all soil samples;

RCRA metals via EPA Methods 6010 and 7471 (total mercury) – all soil samples;

Polycyclic aromatic hydrocarbons (PAHs) by EPA Method 8270 – all soil samples; and

Polychlorinated biphenyls (PCBs) by EPA Method 8082 – all soil samples.

Due to the poor recovery of granular material at soil boring GP-3 adequate soil volume was not available for RCRA metals or PCB analysis.

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Soil samples collected from soil borings GP-2R and GP-19 through GP-22 were submitted for PCB analysis and soil samples collected from soil borings GP-23 through GP-29 were submitted only for total lead analysis.

Following the Geoprobe soil boring advancement and associated soil sample collection, each of the soil borings was abandoned with bentonite chips in accordance with Chapter NR 141. The borehole abandonment forms are included as Attachment B.

Due to a minimum amount of soil cuttings generated during the Geoprobe activities, the used polyethylene liners were disposed of in garbage containers.

Source Site Characterization Results:

Geology: Soils observed within project area consist of lacustrine interbedded deposits of silt, silty clay, silty sand, sands, sandy gravel and clay. In general a 6-inch thick layer of sand or sandy gravel was present below the concrete within the channel. The soil boring logs are presented in Attachment A.

Sample Analytical Results: The analytical results are summarized as follows:

VOCs – No VOCs were detected at concentrations greater than the method detection limit within any of the soil samples collected for analysis.

PAHs – Select PAH constituents were detected at concentrations greater than the method detection limits within 9 of the 36 soil samples. Constituents benzo(a)pyrene, benzo(b)fluoranthene, and/or dibenzo(a,h,)anthracene were detected, within seven soil samples, at concentrations greater than

WDNR standards for non-industrial direct contact residual contaminant level (RCL). None of the detected PAH constituents was reported at a concentration greater than its WDNR groundwater pathway RCL. In addition, no PAHs were detected within soil samples at a depth greater than 4 feet bgs.

RCRA Metals – Detections of arsenic and total lead were the only constituents present at concentrations greater than WDNR standards for either non-industrial direct contact residual contaminant level (RCL) or its WDNR groundwater pathway RCL. Only one of the three detections of arsenic at a concentration of 9.7 mg/kg within the soil sample collected from GP-18 at depth of 2 to 4 feet, exceeds the WDNR background level of 8 mg/kg. The six detections of lead ranged in concentration from 45.5 mg/kg to 499 mg/kg. The two highest concentrations, 499 mg/kg within the soils sample collected from GP-10 at a depth of 0 to 2 feet and 266 mg/kg within the soil sample collected from GP-15 at a depth of 0 to 2 feet were re-analyzed to confirm the detected concentration. The re-analysis of the extracted sample produced the same result, however analysis of additional soil from the same sample produced results of 101 mg/kg from GP-10 (0 to 2 feet) and

89.2 mg/kg from GP-15 (0 to 2 feet).

Review of the analytical results for soil samples collected from soil borings GP-23 through GP-29, completed near soil borings GP-10 and GP-15 to further evaluate the potential presence of elevated lead within the sediment indicate that lead was present at concentrations ranging from 2.05 mg/kg to 15.6 mg/kg. All of the detected concentrations were less than WNDR RCLs for risk to groundwater and/or non-industrial direct contact.

PCBs – The reported concentrations of PCBs were less than the method detection limits with the exception of Aroclor 1248 within the soil samples collected from GP-2 at 0 to 2 and 4 to 6 feet bgs. The PCB was detected within the two samples at concentrations of 0.163 mg/kg and 0.0256 mg/kg, respectively. The detected concentrations are less than WDNR standards for both non-industrial direct contact residual contaminant level (RCL) and the WDNR groundwater pathway RCL.

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Review of the analytical results for soil samples collected from soil borings GP-2R and GP-19 through GP-22, completed near soil boring GP-2 indicate that low level PCB-1254 is present within four of the nine soil samples collected. The detected concentrations ranged from 0.0137 mg/kg

(below the LOQ) to 0.0809 mg/kg.

The analytical data is summarized in Table 1 and the analytical reports are presented in Attachment

C.

PROPOSED MATERIAL MANAGEMENT PLAN

Given the limited presence of low level PAH, PCB, lead and arsenic impacts all of the sediment proposed for excavation is proposed for placement at the former Lakefield Sand and Gravel property.

Sediment will be dewatered to remove free liquids prior to loading and transport to Lakefield Sand and Gravel.

FORMER LAKEFIELD SAND AND GRAVEL BACKGROUND

Location of Lakefield Sand & Gravel:

SE¼ of the NW¼ of Section 22 Range 21 East

Latitude: 43.1432044

Longitude: -87.9968684

Former Lakefield Sand & Gravel Property Owner:

SWP Properties, LLC

Mr. David Scherzer, member

1300 W. Canal Street

Milwaukee, WI 53233

414-643-4101 dscherzer@thesigmagroup.com

Former Lakefield Sand and Gravel Consultant:

The Sigma Group, Inc.

Kristin Kurzka, P.E.

1300 W. Canal Street

Milwaukee, WI 53233

414-643-4127 kkurzka@thesigmagroup.com

A detailed summary of the history of the former Lakefield Sand and Gravel Property including environmental investigation activities completed to date and associated results as well as the proposed closure plan for the site was recently submitted to the WDNR in letter entitled 2015

Impacted Soil Screening Criteria Approval Request, SWP Properties, LLC (Former Lakefield Sand &

Gravel Property) dated September 15, 2015. A copy of the recent submittal (minus extended appendices) is included as Attachment D.

In order to feasibly cap the approximately 12-acre former Lakefield Sand and Gravel property the owners propose to place low level impacted soil over the landfill and below a 2-foot thick non-impacted low permeability soil cap. Pending completion of the remedial filling and capping activities the nearly land locked site will be gifted to Milwaukee County. Upon receipt of the property, Milwaukee County intends to put the property to productive use by expanding the adjacent County owned Uhlien Soccer Field complex through the creation of more greatly needed soccer fields.

CH. NR 718.12 DISCUSSION

Based on the character of Underwood Creek sediment proposed for disposal at the former Lakefield

Sand and Gravel site and the proposed placement and capping remedial activities, exemptions to ch.

289, Stats., and chs. NR 500 to 538 are requested. More specifically:

As discussed above, VOCs were not detected within the sediment at concentrations greater than laboratory reporting limits. Concentrations of select PAH constituents were identified within select soil samples at concentrations greater than applicable RCLs for direct contact (7 of 34 samples) within the sediment and low level PCBs, less than 1 mg/kg, are present within a limited area of mailto:dscherzer@thesigmagroup.com mailto:kkurzka@thesigmagroup.com

I:\MMSD\15543 - Underwood Creek\080 Outgoing Correspondence\Lakefield Request\WDNR Disposal Approval Request.doc sediment proposed for excavation and off-site disposal. In addition, concentrations of total lead (6 of 48 samples) were also reported greater than applicable RCLs for the protection of groundwater pathway within select soil samples.

Placement of the sediment to be excavated from Underwood Creek will not pose a threat to human health and the environment based on the following lines of evidence:

The detected concentrations of select PAHs within six of the 34 samples representing soil proposed for placement at the former Lakefield Sand and Gravel were greater than the non-industrial RCL for direct contact, however the low level impacted soil will be placed below a minimum two-foot non-impacted soil cap, thereby addressing the potential risk.

The detected concentrations of PCB-1254, all less than 1 mg/kg, are present within an isolated area of the project corridor, represent a minor fraction of soil proposed for excavation and off-site disposal, are relatively insoluble in nature, and will be placed below a minimum one-foot thick non-impacted low permeability soil cap (2-feet total).

Concentrations of total lead greater than the WDNR groundwater pathway RCL were present only in shallow soil samples. Laboratory analysis of soil samples collected at the same soil borings at greater depths did not indicate the presence of lead at concentrations greater than the WDNR groundwater pathway RCL. This data would indicate that the relative solubility of lead within soil in typical neutral pH conditions is low and likely to remain adhered to soil particles and therefore not a threat to groundwater quality at the former

Lakefield Sand and Gravel property.

The ratio of total lead impact to the estimated quantity of sediment proposed for placement at the former Lakefield Sand and Gravel property, is nearly negligible indicating that significant contaminant loading for lead is not likely.

The sediment samples with concentrations of total lead greater than the WDNR groundwater pathway RCLs, consisted of clays, silts and sandy silts. In addition, lead present within the fill materials (both historic and recent) present at Lakefield Sand and Gravel are clay rich in composition. Considering the relatively low permeability of the fill soils present at Lakefield

Sand and Gravel, the relatively low permeability of the Underwood Creek sediments proposed for placement, and the engineered construction of the site cap of two feet of non-impacted soil cap, one-foot of which will be constructed of low permeability soils the risk to groundwater from these materials is likely negligible.

Comparison of the limited PAH and total lead concentrations within the Underwood Creek sediment samples with PAH and total lead concentrations detected within existing fill/soil at the Lakefield

Sand and Gravel site (as documented in the submittal included in Attachment D) indicates that the detected total lead and PAH concentrations within the Underwood Creek sediment are within the range of concentrations already present within material at the Lakefield site with the exception of concentrations of total lead within two soil samples collected from soil borings GP-10 (499 mg/kg and 101 mg/kg at 0 to 2 feet bgs) and GP-15 (286 mg/kg and 89.2 mg/kg at 0 to 2 feet bgs.

Additional soil sampling near soil borings GP-10 and GP-15 did not identify the presence of total lead at concentrations greater than WDNR RCLs for either non-industrial direct contact or risk to groundwater.

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If approved for placement at the former Lakefield Sand and Gravel property, the Underwood Creek sediment will not be placed:

1. Within a flood plain.

2. Within 300 feet of any off-site water supply well.

3. Within 3 feet of the high groundwater level.

4. At a depth greater than the depth of the original excavation from which the contaminated material was removed (not applicable).

5. Where the contaminated material poses a threat to public health, safety, or welfare or the environment – per the discussion above and the proposed capping plan for the Lakefield

Sand and Gravel property.

Both a delineated wetland and a pond are present within 100-feet of the former Lakefield Sand and

Gravel north and west property boundaries (see Attachment D). However, given the concentration of relatively insoluble PAHs and RCRA metals detected within the material proposed for placement, the placement of the material 8-feet or more above the measured site groundwater table and capping of the material with a low permeability soil cap, it is not likely that the soil will impact the quality of either the wetland or the pond.

DISCUSSION

Based on the results of the material characterization completed for the Underwood Creek rehabilitation project it appears that select PAHs and total lead constituents are present at concentrations within the range present at the clay-rich Lakefield Sand and Gravel site. As such it is not expected that these low level concentrations would adversely affect residual groundwater impacts already present at Lakefield Sand and Gravel. In addition, the Underwood Creek sediment will be placed at or above the existing ground surface, which represents a distance no closer than 8-feet above the groundwater table. Consistent with the WDNR approved remedial action/soil management plan all of the imported material will be capped by a minimum one-foot of low permeability soil and one foot of non-impacted soil (2-feet total) graded to shed precipitation and effectively prevent risk due to migration to groundwater and direct contact.

Updated Lakefield Sand and Gravel Fill Capacity Estimate:

Currently 49,731 cubic yards of low level impacted soil from the following WDNR approved sources has been placed at the former Lakefield Sand and Gravel site:

Park East Square Block 1 – BRRTS #02-41-551661, FID #341162360

23,075 cubic yards (1,775 truckloads @ 13 cubic yards/truck)

833 East Michigan Street – BRRTS #02-41-554169, FID #341176880

12,610 cubic yards (970 truckloads @ 13 cubic yards/truck)

Menomonee River Dredgings – through 11/16/15

9,730 cubic yards of an estimated 14,000 cubic yards total

HSI – State Street Station

4,316 cubic yards (332 loads @13 cubic yards/truck)

Based on the current grades at the site an additional 129,270 cubic yards of capacity remains.

The placement of the estimated 39,000-cubic yards of Underwood Creek sediment at the Lakefield

Sand and Gravel property will bring the property closer to closure.

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CONCLUSION

Given the character of the material and the characteristics and remedial strategy at the former

Lakefield Sand and Gravel property, it is requested that the Underwood Creek sediment be disposed of at the former Lakefield Sand and Gravel property. This request encompasses both the WDNR

Solid Waste program Low Hazard Exemption and the WDNR Remediation and Redevelopment

Program Ch. NR 718.12 Soil Management approval.

We look forward to receiving approval to appropriately manage select material to be generated from the proposed Underwood Creek rehabilitation project while implementing the approved Lakefield

Sand and Gravel remedial action plan moving both projects closer to completion. Your prompt attention to this request is appreciated. A check, for the WDNR technical review fee, in the amount of $700 is also enclosed.

Please contact us you have any questions.

Sincerely, THE SIGMA GROUP, INC.

Kristin Kurzka, P.E. Randy E. Boness, P.G.

Senior Engineer Geosciences Group Leader cc: Ms. Rebecca Specht, MMSD t:

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TABLE

Soil Sample Location:

Sample Depth (feet bgs): 2-4 4-6 0-2 4-6 0-2 4-6 2-4 4-6 2-4 4-6

Sample Collection Date: 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15

Unsaturated/Smear Zone (U) or Saturated (S): S S U U S S U U U U

VOCs

Benzene mg/kg <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 0.0051 1.49

Bromobenzene mg/kg <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 NS 354

Bromodichloromethane mg/kg <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 0.0003 0.39

Bromoform mg/kg <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 0.0023 61.5 tert-Butylbenzene mg/kg <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 NS 183 sec-Butylbenzene mg/kg <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 NS 145 n-Butylbenzene mg/kg <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 NS 108

Carbon tetrachloride mg/kg <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 0.0039 0.854

Chlorobenzene mg/kg <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 NS 392

Chloroethane mg/kg <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 0.2266 NS

Chloroform mg/kg <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 0.0033 0.423

Chloromethane mg/kg <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 0.0155 171

2-Chlorotoluene mg/kg <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 NS 907

4-Chlorotoluene mg/kg <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 NS 253

1,2-Dibromo-3-chloropropane mg/kg <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 0.0002 0.008

Dibromochloromethane mg/kg <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 0.032 0.933

1,4-Dichlorobenzene mg/kg <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 0.144 3.48

1,3-Dichlorobenzene mg/kg <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 1.1528 297

1,2-Dichlorobenzene mg/kg <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 1.168 376

Dichlorodifluoromethane mg/kg <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 3.0863 135

1,2-Dichloroethane mg/kg <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 0.0028 0.608

1,1-Dichloroethane mg/kg <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 0.4828 4.72

1,1-Dichloroethene mg/kg <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 0.005 342 cis-1,2-Dichloroethene mg/kg <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 0.0412 156 trans-1,2-Dichloroethene mg/kg <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 0.0588 1,560

1,2-Dichloropropane mg/kg <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 0.0033 1.33

2,2-Dichloropropane mg/kg <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 NS 527

1,3-Dichloropropane mg/kg <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 0.0003 1,490

Di-isopropyl Ether mg/kg <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 NS 2,260

EDB (1,2-Dibromoethane) mg/kg <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 0.0000282 0.047

Ethylbenzene mg/kg <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 1.57 7.47

Hexachlorobutadiene mg/kg <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 NS 6.22

Isopropylbenzene mg/kg <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 NS NS p-Isopropyltoluene mg/kg <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 NS 162

Methylene chloride mg/kg <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.0026 60.7

Methyl-tert-butyl-ether mg/kg <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 0.027 59.4

Naphthalene mg/kg <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 0.6582 5.15 n-Propylbenzene mg/kg <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 NS 264

1,1,2,2-Tetrachloroethane mg/kg <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 0.0002 0.753

1,1,1,2-Tetrachloroethane mg/kg <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 0.0534 2.59

Tetrachloroethene (PCE) mg/kg <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 0.0045 30.7

Toluene mg/kg <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 1.1072 818

1,2,4-Trichlorobenzene mg/kg <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 0.408 22

1,2,3-Trichlorobenzene mg/kg <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 NS 48.9

1,1,1-Trichloroethane mg/kg <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 0.1402 640

1,1,2-Trichloroethane mg/kg <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 0.0032 1.48

Trichloroethene (TCE) mg/kg <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 0.0036 1.26

Trichlorofluoromethane mg/kg <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 NS 1,120

1,2,4-Trimethylbenzene mg/kg <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 89.8

1,3,5-Trimethylbenzene mg/kg <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 182

Vinyl Chloride mg/kg <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 0.0001 0.067

Xylenes (total) mg/kg <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 3.94 258

PAHs

Acenaphthene mg/kg <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 NS 3,440

Acenaphthylene mg/kg <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 NS NS

Anthracene mg/kg <0.0171 <0.0171 0.0301 J <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 197.7273 17,200

Benzo(a)anthracene mg/kg <0.0191 <0.0191 0.114 <0.0191 <0.0191 <0.0191 0.035 J <0.0191 <0.0191 <0.0191 NS 0.148

Benzo(a)pyrene mg/kg <0.0143 <0.0143 [0.129] <0.0143 <0.0143 <0.0143 [0.0308J] <0.0143 <0.0143 <0.0143 0.47 0.015

Benzo(b)fluoranthene mg/kg 0.030 J <0.019 [0.232] <0.019 <0.019 <0.019 0.050 J <0.019 <0.019 <0.019 0.4793 0.148

Benzo(ghi)perylene mg/kg <0.02 <0.02 0.125 <0.02 <0.02 <0.02 0.032 J <0.02 <0.02 <0.02 NS NS

Benzo(k)fluoranthene mg/kg <0.0174 <0.0174 0.091 <0.0174 <0.0174 <0.0174 0.0248 J <0.0174 <0.0174 <0.0174 NS 1.48

Chrysene mg/kg 0.0207 J <0.0192 0.144 <0.0192 <0.0192 <0.0192 0.036 J <0.0192 <0.0192 <0.0192 0.1446 14.8

Dibenzo(a,h)anthracene mg/kg <0.015 <0.015 [0.0203J] <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 NS 0.015

Fluoranthene mg/kg 0.0293 J <0.0192 0.267 <0.0192 <0.0192 <0.0192 0.078 <0.0192 <0.0192 <0.0192 88.8778 2,290

Fluorene mg/kg <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 14.8027 2,290

Indeno(1,2,3-cd)pyrene mg/kg <0.0165 <0.0165 0.10 <0.0165 <0.0165 <0.0165 0.0229 J <0.0165 <0.0165 <0.0165 NS 0.148

1-Methylnaphthalene mg/kg <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 NS 15.6

2-Methylnaphthalene mg/kg <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 NS 229

Naphthalene mg/kg <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 0.6582 5.15

Phenanthrene mg/kg <0.0198 <0.0198 0.116 <0.0198 <0.0198 <0.0198 0.051 J <0.0198 <0.0198 <0.0198 NS NS

Pyrene mg/kg 0.0257 J <0.0192 0.221 <0.0192 <0.0192 <0.0192 0.064 <0.0192 <0.0192 <0.0192 54.1322 1,720

RCRA Metals

Arsenic mg/kg <0.67 <0.67 <0.67 <0.67 NA NA <0.67 [2.15J] [1.08J] <0.67 0.584 0.613

Barium mg/kg 13.5 15.2 67.1 19.2 NA NA 22.6 11.2 14.2 11.6 164.8 15,300

Cadmium mg/kg <0.08 <0.08 <0.08 <0.08 NA NA <0.08 <0.08 <0.08 <0.08 0.752 70

Chromium mg/kg 10.9 6.73 17.8 7.3 NA NA 8.48 5.97 11.1 7.77 360,000 NS

Lead mg/kg 7.75 5.55 73.2 7.96 NA NA 45.5 13.5 8.09 6.4 27 400

Mercury mg/kg <0.0031 <0.0031 0.0414 0.0063 J NA NA <0.0031 0.0043 J 0.0100 <0.0031 0.208 3.13

Selenium mg/kg <0.055 <0.55 <0.55 <0.55 NA NA <0.55 <0.55 <0.55 <0.55 0.52 391

Silver mg/kg <0.44 <0.44 <0.44 <0.44 NA NA <0.44 <0.44 <0.44 <0.44 0.85 391

PCBs

PCB-1016 mg/kg <0.0035 <0.0035 <0.0035 <0.0035 NA NA <0.0035 <0.0035 <0.0035 <0.0035 0.0094 3.93

PCB-1221 mg/kg <0.0054 <0.0054 <0.0054 <0.0054 NA NA <0.0054 <0.0054 <0.0054 <0.0054 0.0094 0.159

PCB-1232 mg/kg <0.0042 <0.0042 <0.0042 <0.0042 NA NA <0.0042 <0.0042 <0.0042 <0.0042 0.0094 0.159

PCB-1242 mg/kg <0.0032 <0.0032 <0.0032 <0.0032 NA NA <0.0032 <0.0032 <0.0032 <0.0032 0.0094 0.221

PCB-1248 mg/kg <0.0032 <0.0032 0.163 0.0256 NA NA <0.0032 <0.0032 <0.0032 <0.0032 0.0094 0.221

PCB-1254 mg/kg <0.0047 <0.0047 <0.0047 <0.0047 NA NA <0.0047 <0.0047 <0.0047 <0.0047 0.0094 0.221

PCB-1260 mg/kg <0.0049 <0.0049 <0.0049 <0.0049 NA NA <0.0049 <0.0049 <0.0049 <0.0049 0.0094 0.221

Cumulative DC RCL Exceeded (Y/N)? --- ---

Notes:

1. Unsaturated/smear zone versus satured soil conditions based on soil moisture conditions recorded on soil boring logs during drilling.

2. Analytical units: mg/kg = milligrams per kilogram (equivalent to parts per million, ppm)

3. NA = not analyzed

6. Laboratory flags: "J" = Analyte detected between Limit of Detection and Limit of Quantitation

7. Exceedances: BOLD = Concentration exceeds Groundwater Pathway RCL (unsaturated soil samples only)

[ ] = Concentration exceeds Non-Industrial Direct Contact RCL (unsaturated soil samples only)

Table 1

Groundwater

Pathway RCL

Non-Industrial

Direct Contact

RCL

1.3821

4. Groundwater Pathway RCL = Residual Contaminant Level for protection of groundwater as presented on the WDNR's RCL Spreadsheet (dated January 2015) referenced in WDNR guidance document PUB-RR-

890 "Soil Residual Contaminant Level Determinations Using the US EPA Regional Screening Level Web Calculator", dated June 2015

Sigma Project No. 15543

Underwood Creek - Wauwatosa, Wisconsin

Soil Analytical Results Table

5. Non-Industrial Direct Contact RCL = Residual Contaminant Level for protection of direct contact at a non-industrial property as presented on the WDNR's RCL Spreadsheet (dated January 2015) with default input parameters as referenced in WDNR guidance document PUB-RR-890 "Soil Residual Contaminant Level Determinations Using the US EPA Regional Screening Level Web Calculator", dated June 2015

GP-5GP-4GP-3GP-2GP-1

Table A.2 (Page 1) The Sigma Group, Inc. I:\MMSD\15543 - Underwood Creek\115 Laboratory Data Tables\15543_Soil Data.xlsx

Sample Depth (feet bgs): 0-2 2-4 2-4 4-6 0-2 2-4 0-2 2-4

Sample Collection Date: 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15

Unsaturated/Smear Zone (U) or Saturated (S): S S U U U U S S

VOCs

Benzene mg/kg <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 0.0051 1.49

Bromobenzene mg/kg <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 NS 354

Bromodichloromethane mg/kg <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 0.0003 0.39

Bromoform mg/kg <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 0.0023 61.5 tert-Butylbenzene mg/kg <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 NS 183 sec-Butylbenzene mg/kg <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 NS 145 n-Butylbenzene mg/kg <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 NS 108

Carbon tetrachloride mg/kg <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 0.0039 0.854

Chlorobenzene mg/kg <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 NS 392

Chloroethane mg/kg <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 0.2266 NS

Chloroform mg/kg <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 0.0033 0.423

Chloromethane mg/kg <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 0.0155 171

2-Chlorotoluene mg/kg <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 NS 907

4-Chlorotoluene mg/kg <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 NS 253

1,2-Dibromo-3-chloropropane mg/kg <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 0.0002 0.008

Dibromochloromethane mg/kg <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 0.032 0.933

1,4-Dichlorobenzene mg/kg <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 0.144 3.48

1,3-Dichlorobenzene mg/kg <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 1.1528 297

1,2-Dichlorobenzene mg/kg <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 1.168 376

Dichlorodifluoromethane mg/kg <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 3.0863 135

1,2-Dichloroethane mg/kg <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 0.0028 0.608

1,1-Dichloroethane mg/kg <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 0.4828 4.72

1,1-Dichloroethene mg/kg <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 0.005 342 cis-1,2-Dichloroethene mg/kg <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 0.0412 156 trans-1,2-Dichloroethene mg/kg <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 0.0588 1,560

1,2-Dichloropropane mg/kg <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 0.0033 1.33

2,2-Dichloropropane mg/kg <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 NS 527

1,3-Dichloropropane mg/kg <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 0.0003 1,490

Di-isopropyl Ether mg/kg <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 NS 2,260

EDB (1,2-Dibromoethane) mg/kg <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 0.0000282 0.047

Ethylbenzene mg/kg <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 1.57 7.47

Hexachlorobutadiene mg/kg <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 NS 6.22

Isopropylbenzene mg/kg <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 NS NS p-Isopropyltoluene mg/kg <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 NS 162

Methylene chloride mg/kg <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.0026 60.7

Methyl-tert-butyl-ether mg/kg <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 0.027 59.4

Naphthalene mg/kg <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 0.6582 5.15 n-Propylbenzene mg/kg <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 NS 264

1,1,2,2-Tetrachloroethane mg/kg <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 0.0002 0.753

1,1,1,2-Tetrachloroethane mg/kg <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 0.0534 2.59

Tetrachloroethene (PCE) mg/kg <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 0.0045 30.7

Toluene mg/kg <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 1.1072 818

1,2,4-Trichlorobenzene mg/kg <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 0.408 22

1,2,3-Trichlorobenzene mg/kg <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 NS 48.9

1,1,1-Trichloroethane mg/kg <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 0.1402 640

1,1,2-Trichloroethane mg/kg <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 0.0032 1.48

Trichloroethene (TCE) mg/kg <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 0.0036 1.26

Trichlorofluoromethane mg/kg <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 NS 1,120

1,2,4-Trimethylbenzene mg/kg <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 89.8

1,3,5-Trimethylbenzene mg/kg <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 182

Vinyl Chloride mg/kg <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 0.0001 0.067

Xylenes (total) mg/kg <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 3.94 258

PAHs

Acenaphthene mg/kg <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 NS 3,440

Acenaphthylene mg/kg <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 NS NS

Anthracene mg/kg <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 197.7273 17,200

Benzo(a)anthracene mg/kg <0.0191 <0.0191 <0.0191 <0.0191 <0.0191 <0.0191 <0.0191 <0.0191 NS 0.148

Benzo(a)pyrene mg/kg <0.0143 <0.0143 <0.0143 <0.0143 <0.0143 <0.0143 <0.0143 <0.0143 0.47 0.015

Benzo(b)fluoranthene mg/kg 0.0253 J <0.019 <0.019 <0.019 <0.019 <0.019 <0.019 <0.019 0.4793 0.148

Benzo(ghi)perylene mg/kg 0.0218 J <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 NS NS

Benzo(k)fluoranthene mg/kg <0.0174 <0.0174 <0.0174 <0.0174 <0.0174 <0.0174 <0.0174 <0.0174 NS 1.48

Chrysene mg/kg 0.0193 J <0.0192 <0.0192 <0.0192 <0.0192 <0.0192 <0.0192 <0.0192 0.1446 14.8

Dibenzo(a,h)anthracene mg/kg <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 NS 0.015

Fluoranthene mg/kg 0.063 <0.0192 <0.0192 <0.0192 <0.0192 <0.0192 <0.0192 <0.0192 88.8778 2,290

Fluorene mg/kg <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 14.8027 2,290

Indeno(1,2,3-cd)pyrene mg/kg <0.0165 <0.0165 <0.0165 <0.0165 <0.0165 <0.0165 <0.0165 <0.0165 NS 0.148

1-Methylnaphthalene mg/kg <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 NS 15.6

2-Methylnaphthalene mg/kg 0.0273 J <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 NS 229

Naphthalene mg/kg <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 0.6582 5.15

Phenanthrene mg/kg 0.039 J <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 NS NS

Pyrene mg/kg 0.050 J <0.0192 <0.0192 <0.0192 <0.0192 <0.0192 <0.0192 <0.0192 54.1322 1,720

RCRA Metals

Arsenic mg/kg <0.67 <0.67 <0.67 <0.67 <0.67 <0.67 <0.67 <0.67 0.584 0.613

Barium mg/kg 60.7 68.2 72.4 67.7 42.7 50.1 31.1 7.49 164.8 15,300

Cadmium mg/kg <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 0.752 70

Chromium mg/kg 16.7 27.9 26.9 18.5 18 22.8 10.2 3.79 360,000 NS

Lead mg/kg 5.57 7.50 6.1 4.09 7.31 6.81 46.8 3.19 27 400

Mercury mg/kg 0.0057 J 0.0092 J 0.0085 J 0.0080 J 0.0189 0.0125 0.0199 <0.0031 0.208 3.13

Selenium mg/kg <0.55 <0.55 <0.55 <0.55 <0.55 <0.55 <0.55 <0.55 0.52 391

Silver mg/kg <0.44 <0.44 <0.44 <0.44 <0.44 <0.44 <0.44 <0.44 0.85 391

PCBs

PCB-1016 mg/kg <0.0035 <0.0035 <0.0035 <0.0035 <0.0035 <0.0035 <0.0035 <0.0035 0.0094 3.93

PCB-1221 mg/kg <0.0054 <0.0054 <0.0054 <0.0054 <0.0054 <0.0054 <0.0054 <0.0054 0.0094 0.159

PCB-1232 mg/kg <0.0042 <0.0042 <0.0042 <0.0042 <0.0042 <0.0042 <0.0042 <0.0042 0.0094 0.159

PCB-1242 mg/kg <0.0032 <0.0032 <0.0032 <0.0032 <0.0032 <0.0032 <0.0032 <0.0032 0.0094 0.221

PCB-1248 mg/kg <0.0032 <0.0032 <0.0032 <0.0032 <0.0032 <0.0032 <0.0032 <0.0032 0.0094 0.221

PCB-1254 mg/kg <0.0047 <0.0047 <0.0047 <0.0047 <0.0047 <0.0047 <0.0047 <0.0047 0.0094 0.221

PCB-1260 mg/kg <0.0049 <0.0049 <0.0049 <0.0049 <0.0049 <0.0049 <0.0049 <0.0049 0.0094 0.221

Cumulative DC RCL Exceeded (Y/N)? --- ---

Notes:

1. Unsaturated/smear zone versus satured soil conditions based on soil moisture conditions recorded on soil boring logs during drilling.

2. Analytical units: mg/kg = milligrams per kilogram (equivalent to parts per million, ppm)

3. NA = not analyzed

6. Laboratory flags: "J" = Analyte detected between Limit of Detection and Limit of Quantitation

7. Exceedances: BOLD = Concentration exceeds Groundwater Pathway RCL (unsaturated soil samples only)

[ ] = Concentration exceeds Non-Industrial Direct Contact RCL (unsaturated soil samples only)

Table 1

Soil Analytical Results Table

Underwood Creek - Wauwatosa, Wisconsin

Sigma Project No. 15543

GP-6

4. Groundwater Pathway RCL = Residual Contaminant Level for protection of groundwater as presented on the WDNR's RCL Spreadsheet (dated January 2015) referenced in WDNR guidance document PUB-RR-890 "Soil Residual Contaminant Level Determinations Using the US EPA Regional Screening Level Web Calculator", dated June 2015

5. Non-Industrial Direct Contact RCL = Residual Contaminant Level for protection of direct contact at a non-industrial property as presented on the WDNR's RCL Spreadsheet (dated

January 2015) with default input parameters as referenced in WDNR guidance document PUB-RR-890 "Soil Residual Contaminant Level Determinations Using the US EPA Regional

Screening Level Web Calculator", dated June 2015

GP-7 GP-8 GP-9

Groundwater

Pathway RCL

Non-Industrial

Direct Contact

RCL

1.3821

Table A.2 (Page 2) The Sigma Group, Inc. I:\MMSD\15543 - Underwood Creek\115 Laboratory Data Tables\15543_Soil Data.xlsx

Sample Depth (feet bgs): 0-2 0-2 2-4 2-4 4-6 0-2 4-6 0-2 4-6 0-2 4-6

Sample Collection Date: 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15 10/29/15

Unsaturated/Smear Zone (U) or Saturated (S): S S S U U U U U U S S

VOCs

Benzene mg/kg <0.016 NA <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 <0.016 0.0051 1.49

Bromobenzene mg/kg <0.039 NA <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 NS 354

Bromodichloromethane mg/kg <0.015 NA <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 0.0003 0.39

Bromoform mg/kg <0.023 NA <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 <0.023 0.0023 61.5 tert-Butylbenzene mg/kg <0.035 NA <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 NS 183 sec-Butylbenzene mg/kg <0.036 NA <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 NS 145 n-Butylbenzene mg/kg <0.086 NA <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 <0.086 NS 108

Carbon tetrachloride mg/kg <0.021 NA <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 0.0039 0.854

Chlorobenzene mg/kg <0.039 NA <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 NS 392

Chloroethane mg/kg <0.045 NA <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 <0.045 0.2266 NS

Chloroform mg/kg <0.026 NA <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 <0.026 0.0033 0.423

Chloromethane mg/kg <0.25 NA <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 0.0155 171

2-Chlorotoluene mg/kg <0.029 NA <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 NS 907

4-Chlorotoluene mg/kg <0.032 NA <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 <0.032 NS 253

1,2-Dibromo-3-chloropropane mg/kg <0.078 NA <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 0.0002 0.008

Dibromochloromethane mg/kg <0.031 NA <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 0.032 0.933

1,4-Dichlorobenzene mg/kg <0.03 NA <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 0.144 3.48

1,3-Dichlorobenzene mg/kg <0.03 NA <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 1.1528 297

1,2-Dichlorobenzene mg/kg <0.039 NA <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 <0.039 1.168 376

Dichlorodifluoromethane mg/kg <0.043 NA <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 <0.043 3.0863 135

1,2-Dichloroethane mg/kg <0.03 NA <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 0.0028 0.608

1,1-Dichloroethane mg/kg <0.025 NA <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 0.4828 4.72

1,1-Dichloroethene mg/kg <0.029 NA <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 0.005 342 cis-1,2-Dichloroethene mg/kg <0.021 NA <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 <0.021 0.0412 156 trans-1,2-Dichloroethene mg/kg <0.024 NA <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 <0.024 0.0588 1,560

1,2-Dichloropropane mg/kg <0.025 NA <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 0.0033 1.33

2,2-Dichloropropane mg/kg <0.1 NA <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 NS 527

1,3-Dichloropropane mg/kg <0.031 NA <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 0.0003 1,490

Di-isopropyl Ether mg/kg <0.012 NA <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 <0.012 NS 2,260

EDB (1,2-Dibromoethane) mg/kg <0.035 NA <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 0.0000282 0.047

Ethylbenzene mg/kg <0.027 NA <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 <0.027 1.57 7.47

Hexachlorobutadiene mg/kg <0.11 NA <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 NS 6.22

Isopropylbenzene mg/kg <0.037 NA <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 NS NS p-Isopropyltoluene mg/kg <0.056 NA <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 NS 162

Methylene chloride mg/kg <0.22 NA <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.0026 60.7

Methyl-tert-butyl-ether mg/kg <0.025 NA <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025 0.027 59.4

Naphthalene mg/kg <0.087 NA <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 <0.087 0.6582 5.15 n-Propylbenzene mg/kg <0.035 NA <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035 NS 264

1,1,2,2-Tetrachloroethane mg/kg <0.013 NA <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 <0.013 0.0002 0.753

1,1,1,2-Tetrachloroethane mg/kg <0.029 NA <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 <0.029 0.0534 2.59

Tetrachloroethene (PCE) mg/kg <0.054 NA <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 0.0045 30.7

Toluene mg/kg <0.031 NA <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 <0.031 1.1072 818

1,2,4-Trichlorobenzene mg/kg <0.085 NA <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 <0.085 0.408 22

1,2,3-Trichlorobenzene mg/kg <0.12 NA <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 NS 48.9

1,1,1-Trichloroethane mg/kg <0.04 NA <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 0.1402 640

1,1,2-Trichloroethane mg/kg <0.033 NA <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 <0.033 0.0032 1.48

Trichloroethene (TCE) mg/kg <0.042 NA <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 <0.042 0.0036 1.26

Trichlorofluoromethane mg/kg <0.06 NA <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 NS 1,120

1,2,4-Trimethylbenzene mg/kg <0.078 NA <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 <0.078 89.8

1,3,5-Trimethylbenzene mg/kg <0.089 NA <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 <0.089 182

Vinyl Chloride mg/kg <0.01 NA <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 0.0001 0.067

Xylenes (total) mg/kg <0.099 NA <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 3.94 258

PAHs

Acenaphthene mg/kg <0.0201 NA <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 <0.0201 NS 3,440

Acenaphthylene mg/kg <0.0198 NA <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 <0.0198 NS NS

Anthracene mg/kg 0.033 J NA <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 <0.0171 197.7273 17,200

Benzo(a)anthracene mg/kg 0.088 NA <0.0191 <0.0191 <0.0191 0.057 J <0.0191 0.0262 J <0.0191 <0.0191 <0.0191 NS 0.148

Benzo(a)pyrene mg/kg [0.097] NA <0.0143 <0.0143 <0.0143 [0.065] <0.0143 [0.0253J] <0.0143 <0.0143 <0.0143 0.47 0.015

Benzo(b)fluoranthene mg/kg [0.192] NA <0.019 <0.019 <0.019 0.123 <0.019 0.049 J <0.019 <0.019 <0.019 0.4793 0.148

Benzo(ghi)perylene mg/kg 0.102 NA <0.02 <0.02 <0.02 0.070 <0.02 0.0284 J <0.02 <0.02 <0.02 NS NS

Benzo(k)fluoranthene mg/kg 0.074 NA <0.0174 <0.0174 <0.0174 0.057 <0.0174 0.0275 J <0.0174 <0.0174 <0.0174 NS 1.48

Chrysene mg/kg 0.122 NA <0.0192 <0.0192 <0.0192 0.077 <0.0192 0.034 J <0.0192 <0.0192 <0.0192 0.1446 14.8

Dibenzo(a,h)anthracene mg/kg <0.015 NA <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 NS 0.015

Fluoranthene mg/kg 0.28 NA <0.0192 <0.0192 <0.0192 0.14 0.0215 J 0.055 J <0.0192 <0.0192 <0.0192 88.8778 2,290

Fluorene mg/kg <0.0184 NA <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 <0.0184 14.8027 2,290

Indeno(1,2,3-cd)pyrene mg/kg 0.074 NA <0.0165 <0.0165 <0.0165 0.047 J <0.0165 0.0173 J <0.0165 <0.0165 <0.0165 NS 0.148

1-Methylnaphthalene mg/kg <0.0205 NA <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 <0.0205 NS 15.6

2-Methylnaphthalene mg/kg <0.0199 NA <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 <0.0199 NS 229

Naphthalene mg/kg <0.0203 NA <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 <0.0203 0.6582 5.15

Phenanthrene mg/kg 0.132 NA <0.0198 <0.0198 <0.0198 0.062 J <0.0198 0.0239 J <0.0198 <0.0198 <0.0198 NS NS

Pyrene mg/kg 0.219 NA <0.0192 <0.0192 <0.0192 0.118 <0.0192 0.047 J <0.0192 <0.0192 <0.0192 54.1322 1,720

RCRA Metals

Arsenic mg/kg <0.67 NA <0.67 <0.67 <0.67 <0.67 <0.67 <0.67 <0.67 <0.67 <0.67 0.584 0.613

Barium mg/kg 41.0 NA 53.0 17.1 29.3 71.2 8.40 47.2 6.32 54.5 59.2 164.8 15,300

Cadmium mg/kg <0.08 NA <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 0.752 70

Chromium mg/kg 60.3 NA 17.5 9.32 8.65 20.1 7.38 15.2 4.91 16.4 16.5 360,000 NS

Lead mg/kg [499] 101 13.6 5.78 7.26 25.2 4.39 14.5 3.32 5.79 4.00 J 27 400

Mercury mg/kg 0.0069 J NA 0.0046 J 0.0054 J 0.0047 J 0.0461 0.0083 J…