2-Attachment B. Phase II Environmental - Sparrow Main Lot.pdf

Phase II Environmental Site Assessment Report

Sparrow Street Property, Milwaukie, Oregon

Prepared for:

Metro 600 Northeast Grand Avenue Portland, Oregon 97232-2736

Prepared by:

Stantec Consulting Services Inc.

9400 SW Barnes Road, Suite 200 Portland, Oregon 97225

Project No. 185750638

May 31, 2018

City of Milwaukie: RFP for Design and Development of the Sparrow Site Attachment B

ATTACHMENT B

Sign-off Sheet

This document entitled Phase II Environmental Site Assessment Report, Sparrow Street Property, Milwaukie, Oregon was prepared by Stantec Consulting Services Inc. (“Stantec”) for Metro (Client).

Any reliance on this document by any third party is strictly prohibited. The material in it reflects Stantec’s professional judgment in light of the scope, schedule and other limitations stated in the document and in the contract between Stantec and the Client. The opinions in the document are based on conditions and information existing at the time the document was published and do not take into account any subsequent changes. In preparing the document, Stantec did not verify information supplied to it by others. Any use which a third party makes of this document is the responsibility of such third party. Such third party agrees that Stantec shall not be responsible for costs or damages of any kind, if any, suffered by it or any other third party as a result of decisions made or actions taken based on this document.

This document was prepared under the supervision and direction of the key staff identified below.

Report Author: Robert McAlister, RG

Project Geologist

Quality Reviewer: Carrie Rackey, CHMM

Associate/Project Manager

Independent Reviewer: Leonard Farr Jr., RG Senior Associate/Geologist

Table of Contents

1.0 INTRODUCTION

2.0 SITE DESCRIPTION AND HISTORY

2.1 PREVIOUS ENVIRONMENTAL REPORTS

2.1.1 2011 Phase I ESA

2.1.2 2012 Phase II ESA

2.1.3 2018 Memorandum

2.1.4 2018 Phase I ESA

3.0 APRIL 2018 PHASE II ESA

3.1 CONCEPTUAL SITE MODEL

3.1.1 LAND USE DETERMINATION

3.1.2 BENEFICIAL WATER USE DETERMINATION

3.1.3 ECOLOGICAL RISK

3.2 PRE-FIELD ACTIVITIES

3.2.1 Health and Safety

3.2.2 Utility Clearance

3.3 SAMPLING METHODS AND OBSERVATIONS

3.3.1 ISM Soil Sampling

3.3.2 Composite Surface Soil Sampling – Camping Areas

3.4 SUBSURFACE CONDITIONS

4.0 APRIL 2018 PHASE II ESA LABORATORY RESULTS

4.1 ISM SOIL ANALYSIS

4.1.1 Decision Unit 1

4.1.2 Follow-Up Analysis - Shallow Native Soil Samples

4.2 COMPOSITE SURFACE SOIL ANALYSIS – CAMPING AREAS

5.0 DATA VALIDATION

6.0 CONCLUSIONS AND RECOMMENDATIONS

7.0 LIMITATIONS

8.0 REFERENCES

Table of Contents

List of Tables

1 Comparison of Previous Soil Analytical Concentrations to Current Screening Values

2 Soil Analytical Results – April 2018

List of Figures

1 Property Location Map

2 Site Plan with Sample Locations

3 Sparrow Property Conceptual Site Model

List of Appendices

A Laboratory Reports

B Data Validation Summary Report

Phase II ESA Report – Sparrow Street Property, Milwaukie, Oregon May 31, 2018

1.0 INTRODUCTION

Stantec Consulting Services Inc. (Stantec) has completed a Phase II Environmental Site Assessment (ESA) on behalf of Metro for the Sparrow Street Property (the “Property”), located north of the intersection of Southeast Sparrow Street and Southeast 25th Avenue in Milwaukie, Oregon, as depicted on Figure 1. The Phase II ESA was performed according to Stantec’s Site-Specific Sampling and Analysis Plan (SSSAP), dated April 5, 2018. The SSSAP was approved by the Oregon Department of Environmental Quality (DEQ) via email on April 6, 2018 and approved by the United States Environmental Protection Agency (EPA) Region 10 Brownfields Project Officer Margret Olsen via email on April 19, 2018.

2.0 SITE DESCRIPTION AND HISTORY

The Property consists of 1.96 acres of unimproved land identified by Clackamas County Tax Assessor records as tax lot 11E36CC00300. The Property is currently owned by the Tri-County Metropolitan Transportation District of Oregon (TriMet). TriMet has previously used the Property as a construction staging yard. Prior to TriMet use, the Property was owned and used by the Oregon Department of Transportation (ODOT) as a yard for storage of stockpiled material including asphalt grindings, mixed sand and gravel, and leaf debris. There are currently no structures on the Property.

No improvements were identified on the Property in historical maps and aerial photographs except for clearing and placement of gravel and asphalt on the ground surface. At the time of implementation of the Phase II ESA described herein, the Property was gravel-covered with patches of asphalt beneath the gravel in some areas. A locked storage container was present on the central eastern Property boundary, and miscellaneous landscaping materials (i.e. piping, pavers, plants) were stored on the western portion of the Property. Two areas that appeared to indicate camping activities (fire rings, refuse, etc.) were observed at the Property at the time of the Phase II ESA in the northern and northwestern portions of the Property. The western boundary is vegetated with trees, and slopes steeply upward approximately 20 to 25 feet. The northern Property boundary slopes steeply downward approximately 30 feet to an unnamed creek.

Surrounding properties are primarily residential. A bike/pedestrian trail, a TriMet-operated light rail line, and Southeast McLoughlin Boulevard are located directly to the east, beyond which is an apartment complex and Kellogg Creek. Residences are located to the south and west.

Property features and locations of stored materials are depicted on Figure 2.

In April 2018, the City of Milwaukie joined the DEQ Voluntary Cleanup Program as a potential purchaser of the Property. DEQ entered the Property into the Environmental Cleanup Site Information (ECSI) database with ID number 6265.

2.1 Previous Environmental Reports

2.1.1 2011 Phase I ESA

In February 2011, Landau Associates (Landau) prepared a Phase I ESA for six properties in the City of Milwaukie, including the Sparrow Street Property. This Phase I ESA was completed for TriMet as part of their due diligence for a light rail line project.

The 2011 Phase I ESA identified the following findings:

• No Recognized Environmental Conditions (RECs) were identified in connection with the six Milwaukie properties; and

• The ground surface at the Sparrow Street Property was obstructed at the time of the site visit with stockpiled materials, including chipped asphalt, mixed sand and gravel and leaf debris. No evidence of spills or potential releases were identified; however, a representative from ODOT indicated that the stockpiled material may include some petroleum hydrocarbon contamination. Landau recommended sampling of soil and shallow groundwater (if encountered) for petroleum hydrocarbons. Landau also recommended procedures for sampling and analysis of stained soil if any was encountered during TriMet’s planned use of the Property;

2.1.2 2012 Phase II ESA

Landau completed a focused Phase II ESA of the Property for TriMet in March 2012, to evaluate the presence of soil contamination at the Property. The Phase II ESA consisted of advancement of seven direct-push borings, identified as B-1 through B-7, to depths ranging from 5 to 25 feet below ground surface (bgs). No groundwater was encountered during this subsurface investigation. A total of 10 depth-discrete soil samples were collected for laboratory analysis of the following constituents:

• 13 priority pollutant metals;

• Diesel- and heavy oil-range hydrocarbons (TPH-Dx and TPH-O);

• Benzene, toluene, ethylbenzene and total xylenes (BTEX); and

• Polycyclic aromatic hydrocarbons (PAHs).

The laboratory results were screened against DEQ Risk Based Concentrations (RBCs) for occupational and construction worker receptor scenarios. The results were additionally screened against DEQ clean fill standards for upland uses and DEQ background metals concentrations. The results indicated the following:

• All detected concentrations of diesel-range hydrocarbons were less than DEQ RBCs.

Although heavy oil-range hydrocarbons were detected in several samples, no RBC has been established by DEQ for this petroleum range;

• No metals were detected at concentrations exceeding both RBCs and the DEQ background values; and

• Thirteen PAHs were detected in one or more samples at concentrations that exceeded the DEQ clean fill standards.

• One PAH, benzo[a]pyrene (BaP), was detected at a concentration that exceeded RBCs in two samples.

Landau did not recommend additional sampling at the Property as a result of the 2012 focused Phase II ESA. However, they did recommend that if potential contamination is encountered during future site use or redevelopment, the material should be evaluated for appropriate handling and disposal to provide protection of human health and the environment.

2.1.3 2018 Memorandum

Stantec prepared a memorandum dated February 9, 2018 for Metro which documents a comparison of the Landau 2012 focused Phase II ESA laboratory results to DEQ direct-contact soil RBCs for residential, urban residential, and occupational land uses as well as DEQ background metals values and clean fill screening criteria. The following findings were reported:

• Lead in soil samples B-2(1) and Comp-1(1) exceed background and clean fill screening values. PAHs in several samples ranging in depth from 1 to 5 feet bgs exceed clean fill screening values. Soil with analytes in excess of background/clean fill screening values must be managed appropriately, such as disposal in a Subtitle D landfill, if they are to be transported off-site;

• Diesel-range hydrocarbons were not detected above DEQ RBCs. Oil-range hydrocarbons were detected in 8 of the 10 samples. DEQ has not published RBCs for oil-range hydrocarbons.

• BaP was detected above the DEQ urban residential RBC in two of the soil samples collected within 3 feet of the ground surface. Additional carcinogenic PAHs were detected at concentrations above urban (multi-family) residential RBCs in one of these samples (B-3[1]). PAHs exceed single-family residential RBCs in three soil samples collected within 3 feet of the ground surface.

• No metals were detected above DEQ-published background concentrations and applicable DEQ RBCs. For metals, DEQ defers to background concentrations as human health screening criteria when they are higher than RBCs, as is the case for arsenic. These results do not indicate a risk to residential site users from exposure to metals in soil at the Property; and

• No BTEX constituents were detected above laboratory reporting limits in the soil samples analyzed. Reporting limits for several non-detect BTEX results exceed screening levels, impacting the ability to evaluate whether BTEX is present at concentrations that pose a potential risk to site users.

The memo concludes that: 1) Direct contact (skin contact, dust inhalation, and/or ingestion) with PAHs in soil may pose a risk to site users if the Property is redeveloped for residential use; and 2) soil with lead and PAHs above DEQ background/Clean Fill screening values must be managed appropriately during redevelopment. A comparison table of the 2012 soil analytical data to current DEQ RBCs (May 2018 revision) is included as Table 1.

2.1.4 2018 Phase I ESA

Stantec completed a Phase I ESA of the Property for Metro and the City of Milwaukie in March 2018. The 2018 Phase I ESA identified metals and petroleum hydrocarbon constituents detected in soil samples collected by Landau during the 2012 focused Phase II ESA as a REC for the Property.

3.0 APRIL 2018 PHASE II ESA

3.1 Conceptual Site Model

The Conceptual Site Model (CSM) for the Property is based on the land use and beneficial water use determinations described below. The CSM is illustrated in Figure 3.

3.1.1 LAND USE DETERMINATION

Current zoning of the site is Low Density Residential (R-5). The low density residential zones are intended to create, maintain, and promote neighborhoods with larger lot sizes where the land use is primarily single-family dwellings. They allow for some non-household living uses but maintain the overall character of a single-family neighborhood. The uses allowed in areas zoned R-5 are indicated in the table below:

Allowed Uses in R-5 Low Density Residential Zone

Allowed Use Permitted Permitted (Type II or III review required)

Permitted (Subject to Conditional Use

Approval)

Residential Uses

Single-family detached dwelling X

Duplex X

Residential home X

Accessory dwelling unit X

Manufactured dwelling park X

Senior housing X

Commercial Uses

Bed and breakfast or vacation rental X

Accessory and Other Uses

Accessory use X

Agricultural or horticultural use X

Community service use X

Home occupation X

Short-term rental X

The redevelopment plan for the Property includes affordable housing. The type of housing (single-or multi-family) has not yet been established. As a result, the exposure scenarios potentially applicable to the site, and that will be utilized in completing a screening level risk assessment for the site, include residential, urban residential, construction worker, and excavation worker.

3.1.2 BENEFICIAL WATER USE DETERMINATION

Depth to groundwater at the Property is greater than 25 feet bgs. Based upon historical site uses, it is highly unlikely that groundwater has been impacted by on-site releases. The Phase I ESA completed by Stantec in March 2018 for the Property identified no environmental database listings for nearby properties with a high potential to impact site groundwater. A reliable source of potable water is provided for the site area by the City of Milwaukie. As a result, this Phase II ESA did not include groundwater assessment. Additionally, the Sparrow-DNS-DU1 sample did not contain concentrations of contaminants exceeding leaching to groundwater screening criteria, therefore groundwater sampling and testing were not performed.

3.1.3 ECOLOGICAL RISK

A Level I Ecological Risk Assessment has not been completed for the Property. Based on conditions observed during the 2018 Phase I ESA, there is the potential for mammals and birds to be present on the Property.

Results of the Ecological Risk Assessment are included in the Conclusions and Recommendations Section of this report.

3.2 Pre-Field Activities

3.2.1 Health and Safety

A Site-Specific Health and Safety Plan (HASP), as required by Oregon Occupational Safety and Health Division (OR-OSHA) Safety and Health Act and 40 Code of Federal Regulations 1910.120, was prepared to describe field sampling activity safety protocols for Stantec employees engaged in the project. At the start of each day of field activities, a safety meeting was held, and safety protocols reviewed.

3.2.2 Utility Clearance

Stantec contacted the Utility Notification Center and requested an underground utility locate for the Site. Stantec additionally subcontracted with Locates Down Under to scan the Property for underground utility conflicts. This work was completed on April 24, 2018.

3.3 Sampling Methods and Observations

3.3.1 ISM Soil Sampling

Incremental Sampling Mythology (ISM) sampling and testing methods followed guidelines established by the Interstate Technology & Regulatory Council (ITRC) in a document titled

Incremental Sampling Methodology (ITRC, 2012). ISM was selected for use at the Property to reduce data variability and provide a reasonably unbiased estimate of the mean contaminant concentrations across the Property.

ISM protocol for this Phase II ESA consisted of designating a single decision unit (DU) including all Property areas that are relatively flat, free of brush and accessible with a track-mounted direct-push drill rig. This DU was further divided into three separate sampling units (SUs) as shown on Figure

2. A total of 20 soil borings were advanced within each SU, for a total of 60 soil borings in the DU.

To ensure even spatial coverage for the soil borings, prior to commencement of drilling Stantec field personnel used survey stakes to mark the individual boring locations and visually confirm that borings were evenly spaced across the SUs.

Borings were advanced on April 25 and 26, 2018 by Stratus Corporation, an Oregon-licensed driller, using a GeoProbe® model 7822-DT direct-push drill rig. All field activities were conducted under the direction of a Stantec field geologist.

For each boring location, three depth-specific sample increments were collected:

• Surface Fill (SF), defined as the depth interval from the ground surface to 1-foot bgs;

• Shallow Native Soil (SNS), defined as the depth interval from 1.5 to 4 feet bgs; and

• Deep Native Soil (DNS), defined as the depth interval from 6 to 8 feet bgs.

At each boring location, approximately 2 ounces of soil from each depth-specific increment was removed from the direct-push acetate sample liner over the vertical intervals indicated above.

For the SF interval (ground surface to 1-foot bgs), soil was collected from the sleeve approximately every 2 inches. However, in locations where asphalt was encountered, the asphalt was removed from the acetate liner and representative surface soil was collected from the acetate sleeve not exceeding 1 foot in depth.

For the soil sample collected from the SNS depth interval, soil was collected from the acetate sleeve uniformly (approximately every 6 inches) over a 2.5-foot interval representing the depth interval 1.5 to 4 feet bgs. A similar sampling strategy was conducted for the DNS depth interval of 6 to 8 feet bgs.

Each SU vertical increment (SF, SNS or DNS) was composited in the field into a laboratory-supplied ISM sampling container, resulting in a total of nine sampling containers, one per vertical interval sample increment for each SU. The ISM sample containers were kept on ice in an insulated cooler for the duration of the sampling and, following completion of drilling activities, were transported under chain-of-custody protocol to Apex Labs in Tigard, Oregon where the samples were processed and composited by Apex Labs following ITRC guidelines. Sample nomenclature, location and depth interval are summarized in the table below:

Soil Sample Naming Nomenclature

Sample Name Sampling/Decision Unit Vertical Interval

Field Sample Nomenclature and Depth Interval

Sparrow-SF (0-1)-SU1 SU1 Surface Fill (0-1 feet bgs)

Sparrow-SNS (1.5-4)-SU1 SU1 Shallow Native Soil (1.5-4 feet bgs)

Sparrow-DNS (6-8)-SU1 SU1 Deep Native Soil (6-8 feet bgs)

Sparrow-SF (0-1)-SU2 SU2 Surface Fill (0-1 feet bgs)

Sparrow-SNS (1.5-4)-SU2 SU2 Shallow Native Soil (1.5-4 feet bgs)

Sparrow-DNS (6-8)-SU2 SU2 Deep Native Soil (6-8 feet bgs)

Sparrow-SF (0-1)-SU3 SU3 Surface Fill (0-1 feet bgs)

Sparrow-SNS (1.5-4)-SU3 SU3 Shallow Native Soil (1.5-4 feet bgs)

Sparrow-DNS (6-8)-SU3 SU3 Deep Native Soil (6-8 feet bgs)

Laboratory-Created Composite Sample Nomenclature

Sparrow-SF-DU1 Composite DU1 Surface Fill

Sparrow-SNS-DU1 Composite DU1 Shallow Native Soil

Sparrow-DNS-DU1 Composite DU1 Deep Native Soil

Laboratory-Created Duplicate and Triplicate Sample Nomenclature

Sparrow-SF-DU1 Duplicate Composite DU1 Surface Fill

Sparrow-SF-DU1 Triplicate Composite DU1 Surface Fill

During ISM sampling, all soil recovered during drilling was screened for volatile organic compounds (VOCs) using a photoionization detector (PID) and observed for other evidence of environmental impact (odor and/or staining). No field evidence of contamination was noted in the 60 ISM soil sample locations and no additional sampling was conducted of soil from the ISM borings.

3.3.2 Composite Surface Soil Sampling – Camping Areas

Stantec collected composite surface soil samples in areas of the Property where signs of transient camping were present at the time of this Phase II ESA. Composite surface soil samples were collected within two approximately 150-square-foot areas identified on Figure 2. Each composite soil sample consisted of a four-point sampling grid (depth interval of 0.25 – 0.75 feet).

Both composite surface soil samples were collected on April 25, 2018 with a decontaminated hand auger and composited in the field to prepare the four-point composite samples identified as “SS-1” and “SS-2”. These composite samples were immediately placed on ice in an insulated cooler and subsequently transported and submitted to Apex Labs.

3.4 Subsurface Conditions

During borehole advancement at the Property, soils were logged by a Stantec registered geologist. Soils encountered beneath the Property consisted of dark brown silt with some small gravel underlain by a yellowish brown poorly graded fine sand. The depth of the silt/sand interface was shallowest at the southern portion of the Property (SU3) at approximately 1.5 feet bgs, and gradually dipped to the north to a depth of approximately 4 feet bgs at the northern extent of the Property (SU1).

The maximum depth explored by Stantec during this Phase II ESA was 8 feet bgs. Groundwater was not encountered at the Property during the implementation of this Phase II ESA.

4.0 APRIL 2018 PHASE II ESA LABORATORY RESULTS

4.1 ISM Soil Analysis

As described in Section 4.2.1, ISM soil samples from the three SUs were submitted to Apex Labs for analytical testing. Each individual SU depth interval was composited by the laboratory into 3 depth-specific DU samples and analyzed for:

• Diesel- and heavy oil-range hydrocarbons by method NWTPH-Dx;

• Priority pollutant metals (antimony, arsenic, beryllium, cadmium, chromium, copper, lead, mercury, nickel, selenium, silver, thallium and zinc) via EPA Method 6020;

• PAHs via EPA Method 8270D selective ion monitoring (SIM); and

• Polychlorinated Biphenyls (PCBs) via EPA Method 8082A.

After receiving the analytical data for the three DU depth intervals, Stantec requested the laboratory analyze the SNS depth interval of 1.5 to 4 feet bgs from the three individual SUs for PAHs to evaluate the lateral and vertical extent of PAHs in soil at the Property.

ISM soil sample testing results are summarized in Table 2. Apex Labs reports are provided in Appendix A.

4.1.1 Decision Unit 1

A comparison of analyte concentrations in the three DU-1 ISM soil samples to potentially applicable DEQ RBCs is provided below.

• BaP was detected in the ISM soil samples collected from the SF and SNS depth intervals of DU1 at concentrations of 249 micrograms per kilogram (µg/kg) and 211 µg/kg, respectively. These concentrations exceed urban residential direct contact RBCs. The BaP toxicity equivalency quotients (TEQs) calculated for the SF and SNS intervals (411.76 µg/kg and 349.97 µg/kg) exceed the direct contact RBCs for urban residential receptors.

• Duplicate and triplicate analytical data for the SF depth interval of DU1 was reported as 381 µg/kg and 412 µg/kg, respectively. These concentrations exceed urban residential direct contact RBCs. The BaP TEQ calculated for the duplicate and triplicate samples (523.15 µg/kg and 563.68 µg/kg, respectively) exceed the DEQ direct contact RBCs for urban residential receptors.

• No occupational, construction, or excavation worker RBCs were exceeded.

A comparison of analyte concentrations detected in ISM soil samples to DEQ metals background concentrations and clean fill screening values is provided below.

• Cadmium was detected in the SF interval of DU1 at a concentration of 0.674 mg/kg, in excess of the DEQ background and clean fill screening value of 0.63 mg/kg.

• PAHs were detected above clean fill screening values in the SF and SNS intervals of DU1.

4.1.2 Follow-Up Analysis - Shallow Native Soil Samples

During sample processing, it was noted that the appearance of soil in the SNS sample from SU1 was different from the SU2 and SU3 samples. To evaluate the representativeness of the SNS interval in SU1, each of the three SNS samples were submitted for analysis of PAHs. Residential RBC exceedances were detected in the SNS interval in only SU1.

BaP was detected in the SNS depth interval of SU1 at a concentration of 846 µg/kg and the BaP TEQ was calculated as 1,102.60 µg/kg, exceeding the DEQ direct contact RBCs for urban residential receptors and the DEQ clean fill screening value. TEQs in the SNS interval of SU2 and SU3 did not exceed urban residential or residential RBCs.

4.2 Composite Surface Soil Analysis – Camping Areas

Two composite surface soil samples from areas where camping was observed were submitted to Apex Labs for analytical testing as described in Section 3.2.2. Each composite surface soil sample was analyzed for:

• Diesel- and heavy oil-range hydrocarbons by method NWTPH-Dx;

• Priority pollutant metals via EPA Method 6020; and

• PAHs via EPA Method 8270D SIM.

Results of composite surface soil sample testing are summarized in Table 2. Apex Labs reports are provided in Appendix A.

A comparison of analyte concentrations detected in composite surface soil samples collected where signs of camping were observed to potentially applicable DEQ RBCs is provided below.

• No metals were detected above the DEQ background values. Diesel-range hydrocarbons were detected in samples SS-1 and SS-2 at concentrations of 1,920 and 1,690 mg/kg, respectively. These values exceeded the DEQ direct contact RBCs for residential and urban residential use.

• The BaP TEQ calculated for sample SS-1 (166.75 µg/kg) exceeds the DEQ direct contact RBC for residential land use. It should be noted that the TEQ is likely biased high due to elevated RLs for both camping area composite samples.

• The total BaP TEQ calculated for sample SS-2 (486.83 µg/kg) exceeds the DEQ direct contact RBCs for residential and urban residential receptors.

A comparison of analyte concentrations detected in composite surface soil samples from camping areas to DEQ background metals and clean fill screening values is provided below.

• Arsenic and lead were detected in sample SS-2 at concentrations exceeding the DEQ background and clean fill screening values of 8.8 mg/kg and 79 mg/kg, respectively.

• BaP and dibenzofuran were detected in sample SS-2 at concentrations exceeding their DEQ clean fill screening values of 110 µg/kg and 2 µg/kg, respectively.

5.0 DATA VALIDATION

All laboratory reports were validated to verify compliance with the project QAPP, and to confirm the usability of the laboratory data. As part of this Phase II ESA, 11 soil samples were initially submitted to Apex Labs (nine ISM samples and two camping area samples). The nine ISM soil samples were composited in the lab into 3 soil samples, identified by the lab as “Sparrow-SF-DU1 Composite,” “Sparrow-SNS-DU1 Composite” and “Sparrow-DNS-DU1 Composite.” The remaining two samples were collected from camping areas as composite surface soil samples “SS-1 and “SS- 2.” At Stantec’s direction, the laboratory prepared two additional soil samples (“Sparrow-SF-DU1 Duplicate Composite” and “Sparrow-SF-DU1 Triplicate Composite”) from the composite sample Sparrow-SF-DU1 Composite.

After receipt of initial data from the samples described above, Stantec requested the laboratory analyze the three SNS depth interval samples from the individual SUs at the Property.

Data validation findings include:

• PAH analysis of samples “Sparrow-SNS(1.5-4)-SU1,” “Sparrow-SNS(1.5-4)-SU2” and “Sparrow- SNS(1.5-4)-SU3” was completed outside of hold time. The results are qualified with a “J” flag to denote an estimated value.

• TPH-Dx analysis of samples “Duplicate Sparrow-SF-DU1” and “Triplicate Sparrow-SF-DU1” were completed outside of hold time. The results are qualified with a “J” flag to denote an estimated value.

All data was deemed usable with these data qualifications. The complete data validation report is included as Appendix B.

6.0 CONCLUSIONS AND RECOMMENDATIONS

Human Health Risk

The BaP TEQ exceeds DEQ residential and urban residential direct contact RBCs in the shallow fill across the entire Property, and in the depth interval from 1.5-4 ft in the northern area (SU1) of the Property. Arsenic, diesel-range hydrocarbons, and the BaP TEQ exceed the residential and urban residential RBCs in the camping-area sample SS-2.

Based on these findings, it appears that mitigation (soil removal or surface capping) is warranted should the Property be redeveloped for residential use.

Ecological Risk

ISM soil samples were compared to DEQ Level II ecological Screening Level Values (SLVs) for birds and mammals. All dibenzofuran detections and RLs exceed the DEQ SLV for mammals of 2.0 µg/kg.

Additionally, composite surface soil samples were compared to DEQ Level II ecological SLVs for birds and mammals. All dibenzofuran detections in these samples exceed the DEQ Level II ecological SLV for mammals of 2.0 mg/kg. Arsenic and lead were detected in sample SS-2 in excess of the SLVs for birds (10 mg/kg and 16 mg/kg, respectively).

Capping or removal of shallow soil as recommended in the human health summary above would mitigate this potential risk to ecological receptors.

DEQ Clean Fill Screening Values Cadmium and PAHs were detected in the SF interval of DU1 at concentrations above the DEQ clean fill screening values. PAHs were detected above clean fill screening values in the SF and SNS intervals of DU1. No clean fill criteria were exceeded in the DNS soil sample. As a result, we recommend developing a Contaminated Media Management Plan (CMMP) to guide worker protection and soil handling and disposal practices during site redevelopment.

7.0 LIMITATIONS

This report documents work that was performed in accordance with generally accepted professional standards at the time and location in which the services were provided. No other representations, warranties or guarantees are made concerning the accuracy or completeness of the data or conclusions contained within this report, including no assurance that this work has uncovered all potential liabilities associated with the identified property.

This report provides an evaluation of selected environmental conditions associated with the identified portion of the property that was assessed at the time the work was conducted and is based on information obtained by and/or provided to Stantec at that time. There are no assurances regarding the accuracy and completeness of this information. All information received from the client or third parties in the preparation of this report has been assumed by Stantec to be correct. Stantec assumes no responsibility for any deficiency or inaccuracy in information received from others.

The conclusions are based on the site conditions encountered by Stantec at the time the work was performed at the specific testing and/or sampling locations, and conditions may vary among sampling locations. Factors such as areas of potential concern identified in previous studies, site conditions (e.g., utilities) and cost may have constrained the sampling locations used in this assessment. In addition, analysis has been carried out for only a limited number of chemical parameters, and it should not be inferred that other chemical species are not present. Due to the nature of the investigation and the limited data available, Stantec does not warrant against undiscovered environmental liabilities nor that the sampling results are indicative of the condition of the entire site. As the purpose of this report is to identify site conditions which may pose an environmental risk; the identification of non-environmental risks to structures or people on the site is beyond the scope of this assessment.

The opinions in this report can only be relied upon as they relate to the condition of the portion of the identified property that was assessed at the time the work was conducted. Activities at the property subsequent to Stantec’s assessment may have significantly altered the property’s condition. Stantec cannot comment on other areas of the property that were not assessed.

Conclusions made within this report consist of Stantec’s professional opinion as of the time of the writing of this report and are based solely on the scope of work described in the report, the limited data available and the results of the work. They are not a certification of the property’s environmental condition. This report should not be construed as legal advice.

8.0 REFERENCES

DEQ, 2013. Development of Oregon Background Metals Concentrations in Soil. March 2013.

DEQ, 2014. Clean Fill Determinations. July 2014.

DEQ, 2015. Table of Risk-Based Concentrations. May 2018.

EPA, 2017. Regional Screening Level Resident Soil Table. June 2017.

ITRC, 2012. Incremental Sampling Methodology. February 2012.

Landau Associates, 2011. Phase I Environmental Site Assessment. File No. 3502R-W. Milwaukie, Oregon.

Landau Associates, 2012. Focused Phase II Environmental Site Assessment. File No. 3502V. SE McLoughlin Boulevard & SE 26th Avenue, Milwaukie, Oregon. April 3, 2012.

Stantec, 2018a. Comparison of Previous Soil Analytical Concentrations to Current Screening Values. SE Sparrow Street and SE 25th Avenue, Milwaukie, Oregon. February 9, 2018.

Stantec, 2018b. Sparrow Street Property, Milwaukie, Oregon, Phase I Environmental Site Assessment. Prepared for Metro. March 21, 2018.

Washington State Department of Ecology, 2015. Evaluating the Human Health Toxicity of Carcinogenic PAHs (cPAHs) Using Toxicity Equivalency Factors (TEFs).

https://fortress.wa.gov/ecy/clarc/FocusSheets/tef.pdf. Accessed May 16, 2018.

Tables

TABLE 1

Comparison of Previous Soil Analytical Concentrations to Current Screening Values

SE Sparrow Street and SE 25th Avenue, Milwaukie, Oregon Default Background

Concentrationsa Clean Fill Screening

Criteria Residential Direct

Contract Screening Values

Urban Residential Direct Contact Screening Values

Occupational Direct Contract Screening

Values

B-1(1) 3/8/12

B-1(5) 3/8/12

B-1(17) 3/8/12

B-2(1) 3/8/12

B-2(5) 3/8/12

B-2(11.5) 3/8/12

B-3(1) 3/8/12

B-3(5) 3/8/12

Comp-1(1) 3/8/12

Comp-1(5) 3/8/12

Priority Pollutant Metals (mg/kg) - EPA Method 6020 Antimony 0.56 0.56 - - - 1.03 U 1.19 U 1.06 U 1.00 U 1.11 U 1.07 U 1.16 U 1.11 U 1.12 U 1.22 U Arsenic 8.8 8.8 0.43 1.0 1.9 2.05 U 3.19 2.41 2.01 U 2.97 2.87 2.32 U 2.98 2.25 U 3.30 Beryllium 2.0 21 160 310 2,300 1.03 U 1.19 U 1.06 U 1.00 U 1.11 U 1.07 U 1.16 U 1.11 U 1.12 U 1.22 U Cadmium 0.63 0.63 78 160 1,100 1.03 U 1.19 U 1.06 U 1.00 U 1.11 U 1.07 U 1.16 U 1.11 U 1.12 U 1.22 U Chromium 76 76 120,000 230,000 >Max 6.67 22.5 10.1 14.0 16.5 16.6 10.2 10.2 8.89 11.4 Copper 34 34 3,100 6,200 47,000 14.7 22.5 18.2 21.3 19.1 20.3 18.4 17.5 17.2 18.0 Lead 79 79 400 400 800 18.6 69.9 3.20 161 26.5 12.7 43.8 4.03 84.7 14.9 Mercury 0.23 0.23 23 47 350 0.0821 U 0.0954 U 0.0848 U 0.0804 U 0.0886 U 0.0855 U 0.0927 U 0.0887 U 0.0899 U 0.0974 U Nickel 47 47 1,500 3,100 22,000 15.1 19.6 14.8 15.2 20.1 21.5 18.6 20.0 16.8 18.0 Selenium 0.71 0.71 - - - 2.05 U 2.38 U 2.12 U 2.01 U 2.22 U 2.14 U 2.32 U 2.22 U 2.25 U 2.44 U Silver 0.82 4.2 390 780 5,800 1.03 U 1.19 U 1.06 U 1.00 U 1.11 U 1.07 U 1.16 U 1.11 U 1.12 U 1.22 U Thallium 5.2 5.2 - - - 1.03 U 1.19 U 1.06 U 1.00 U 1.11 U 1.07 U 1.16 U 1.11 U 1.12 U 1.22 U Zinc 180 180 - - - 28.3 73.6 39.9 59.8 48.3 46.1 43.5 39.6 41.2 43.4 TCLP Metals (mg/L) - EPA Method 6020 Lead - - - - - NA NA NA 0.110 NA NA NA NA NA NA Total Petroleum Hydrocarbons (mg/kg) Method NWTPH-Dx Diesel Range Organics - - 1,100 2,200 14,000 457 U 978 25.0 U 498 U 88.2 U 87.0 U 402 U 25.0 U 425 U 192 U Oil Range Organics - - - - - 7,470 7,960 50.0 U 7,140 1,150 671 8,120 50.0 U 10,100 2,020 BTEX (µg/kg) - EPA Method 8260B Benzene - 9.3 8,200 24,000 37,000 12.4 U 15.8 U NA 12.4 U 12.3 U 11.9 U 10.4 U NA 11.5 U 13.0 U Toluene - 140,000 5,800,000 12,000,000 88,000,000 49.7 U 63.4 U NA 49.8 U 49.1 U 47.6 U 41.8 U NA 45.8 U 52.1 U Ethylbenzene - 160 34,000 110,000 150,000 24.8 U 31.7 U NA 24.9 U 24.6 U 23.8 U 20.9 U NA 22.9 U 26.1 U Total Xylenes - 25,000 1,400,000 2,900,000 25,000,000 74.5 U 95.1 U NA 74.7 U 73.7 U 71.4 U 62.7 U NA 68.7 U 78.2 U Polycyclic Aromatic Hydrocarbons (μg/kg) - EPA Method 8270D (SIM) Acenaphthene - 29,000 4,700,000 94,000,000 70,000,000 228 U 51.7 U NA 195 U 82.3 U 86.7 U 2,650 NA 199 U 93.8 U Acenaphthylene - - - - - 228 U 138 NA 195 U 82.3 U 86.7 U 268 NA 199 U 93.8 U Anthracene - 29,000 23,000,000 47,000,000 350,000,000 228 U 113 NA 195 U 82.3 U 86.7 U 1,160 NA 199 U 93.8 U Benzo(a)anthracene* - 1,100 1,100 2,500 21,000 228 U 122 NA 195 U 82.3 U 86.7 U 5,390 NA 577 93.8 U Benzo(a)pyrene* - 110 110 250 2,100 228 U 210 NA 218 105 90.0 4,340 NA 935 93.8 U Benzo(b)fluoranthene* - 1,100 1,100 2,500 21,000 228 U NA NA NA NA 137 NA NA NA 93.8 U Benzo(k)fluoranthene* - 11,000 11,000 25,000 210,000 228 U NA NA NA NA 86.7 U NA NA NA 93.8 U Benzo(b+k)fluoranthene - - - - - NA 326 NA 391 U 165 U 175 8,020 NA 1,190 NA Benzo(g,h,i)perylene - - - - - 250 1,010 NA 341 118 173 U 2,200 NA 841 93.8 U Chrysene* - 110,000 110,000 250,000 2,100,000 228 U 300 NA 205 111 155 7,380 NA 1,140 93.8 U Dibenz(a,h)anthracene* - 110 110 250 2,100 228 U 87.8 NA 195 U 82.3 U 86.7 U 572 NA 398 U 93.8 U Fluoranthene - 29,000 2,400,000 48,000,000 30,000,000 228 U 158 NA 195 U 135 88.4 10,500 NA 499 93.8 U Fluorene - 29,000 3,100,000 6,300,000 47,000,000 228 U 105 NA 195 U 82.3 U 86.7 U 2,400 NA 199 U 93.8 U Indeno(1,2,3-cd)pyrene* - 1,100 1,100 2,500 21,000 228 U 317 NA 195 U 84.9 173 U 2,450 NA 604 93.8 U Naphthalene - 87 5,300 25,000 23,000 228 U 58.7 NA 195 U 82.3 U 86.7 U 217 U NA 199 U 93.8 U Phenanthrene - - - - - 228 U 220 NA 195 U 82.3 U 86.7 U 4,570 NA 199 U 93.8 U Pyrene - 1,700,000 1,800,000 3,600,000 23,000,000 228 U 251 NA 282 168 104 10,400 NA 1,040 93.8 U

* Carcinogenic PAH U = The compound was not detected above the given reporting limit.

Bold = Detection above laboratory reporting limits.

Yellow higlighting = concentration exceeds DEQ background/clean fill screening criteria Red text = concentration exceeds DEQ residential and/or urban residential screening criteria and clean fill criteria NA = Not Analyzed "-" = No screening value available.

(a) Oregon Department of Environmental Quality (DEQ), Development of Oregon Background Metals Concentrations in Soil, March 2013 - Portland Basin.

(b) DEQ Clean Fill Determinations, last updated 7/23/14.

(c) DEQ risk-based concentrations for direct contact, last updated 11/1/15, except for carcinogenic PAHs, which are US Environmental Protection Agency regional screening levels to reflect change in Benzo(a)pyrene slope factor, last updated November 2017.

Urban residential carcinoginic PAH screening values were calculated using current Benzo(a)pyrene slope factor and DEQ exposure assumptions.

V:\1857\Active\185750638_MetroBrownfields\05_report_deliv\deliverable\1_Sparrow\Phase II ESA\Table\TABLE 1 - Soil data comparison.xlsx Stantec Consulting Services Inc.

5/31/2018

TABLE 2

Soil Sample Analytical Results - April 2018

Priority Pollutant Metals (mg/kg) - EPA Method 6020 Antimony 0.56 0.56 - 15 - - - 0.503 U 0.561 U 0.508 U 0.559 U 0.489 U NA NA NA 0.531 U 0.534 U Arsenic 8.8 8.8 10 29 0.43 1.0 1.9 2.56 4.45 4.59 2.70 2.50 NA NA NA 1.02 J 14.8 Beryllium 2.0 21 - 83 160 310 2,300 0.253 0.429 0.488 0.280 0.268 NA NA NA 0.112 J 0.236 Cadmium 0.63 0.63 6 125 78 160 1,100 0.674 0.613 0.613 0.524 0.476 NA NA NA 0.214 0.583 Chromium 76 76 4 340,000 120,000 230,000 >Max 24.7 19.3 16.4 22.6 21.3 NA NA NA 6.33 38.5 Copper 34 34 190 390 3,100 6,200 47,000 31.6 25.6 24.8 30.3 28.2 NA NA NA 15.2 25.3 Lead 79 79 16 4,000 400 400 800 74.7 38.2 13.8 76.1 65.2 NA NA NA 18.0 368 Mercury 0.23 0.23 1.5 73 23 47 350 0.201 U 0.325 U 0.203 U 0.224 U 0.196 U NA NA NA 0.0425 U 0.0427 U Nickel 47 47 320 625 1,500 3,100 22,000 27.9 24.3 23.1 26.0 25.8 NA NA NA 14.3 17.0 Selenium 0.71 0.71 2 25 - - - 0.503 U 0.561 U 0.508 U 0.559 U 0.489 U NA NA NA 0.531 U 0.534 U Silver 0.82 4.2 - - 390 780 5,800 0.108 J 0.112 U 0.102 U 0.112 U 0.0979 U NA NA NA 0.106 U 0.107 U Thallium 5.2 5.2 - 1 - - - 0.101 U 0.112 U 0.117 J 0.112 U 0.0979 U NA NA NA 0.106 U 0.107 U Zinc 180 180 60 20,000 - - - 71.1 61.5 60.4 70.8 66.2 NA NA NA 26.7 265 Total Petroleum Hydrocarbons (mg/kg) Method NWTPH-Dx Diesel Range Organics - - - - 1,100 2,200 14,000 936 U 95.6 U 9.82 U 403 U 201 U NA NA NA 1,920 J 1,690 J Oil Range Organics - - - - - - - 4,750 1,580 19.6 U 2,950 J 3,140 J NA NA NA 5,090 4,630 Polychlorinated Biphenyls (µg/kg) - EPA Method 8082A Aroclor 1016 - - - - - - - 5.02 U 5.03 U 5.05 U 4.99 U 5.00 U NA NA NA NA NA Aroclor 1221 - - - - - - - 5.02 U 5.03 U 5.05 U 4.99 U 5.00 U NA NA NA NA NA Aroclor 1232 - - - - - - - 5.02 U 10.1 U 5.05 U 4.99 U 5.00 U NA NA NA NA NA Aroclor 1242 - - - - - - - 5.02 U 5.03 U 5.05 U 4.99 U 5.00 U NA NA NA NA NA Aroclor 1248 - - - - - - - 5.02 U 5.03 U 5.05 U 4.99 U 5.00 U NA NA NA NA NA Aroclor 1254 - - - - - - - 11.6 J 5.03 U 5.05 U 4.99 U 10.0 U NA NA NA NA NA Aroclor 1260 - - - - - - - 11.4 J 6.57 J 5.05 U 11.7 12.4 NA NA NA NA NA Total PCBs - 230 - 4,000 230 330 590 48.1 48.82 35.35 41.64 47.40 NA NA NA NA NA Polycyclic Aromatic Hydrocarbons (μg/kg) - EPA Method 8270D (SIM) Acenaphthene - 29,000 - - 4,700,000 94,000,000 70,000,000 666 195 U 4.83 U 496 J 608 J 100 U 4.99 U 5.03 U 103 U 240 Acenaphthylene - - - - - - - 189 U 195 U 4.83 U 99.6 U 99.9 U 100 U 4.99 U 5.03 U 103 U 103 U Anthracene - 29,000 - - 23,000,000 47,000,000 350,000,000 189 U 195 U 4.83 U 122 J 138 J 119 J 4.99 U 5.03 U 103 U 103 U Benzo(a)anthracene* - 1,100 - - 1,100 2,500 21,000 403 J 390 U 4.83 U 309 J 345 J 521 J 13.5 J 7.68 J 205 U 212 J Benzo(a)pyrene* - 110 - 125,000 110 250 2,100 249 J 211 J 4.83 U 381 J 412 J 846 J 27.6 J 16.0 J 103 U 370 Benzo(b)fluoranthene* - 1,100 - - 1,100 2,500 21,000 372 J 250 J 4.83 U 478 J 498 J 885 J 28.8 J 17.9 J 103 U 401 J Benzo(k)fluoranthene* - 11,000 - - 11,000 25,000 210,000 264 J 195 U 4.83 U 163 J 204 J 305 J 9.49 J 6.19 J 103 U 122 J Benzo(g,h,i)perylene - - - - - - - 588 440 4.83 U 466 J 471 J 881 J 45.5 J 20.8 J 119 J 433 Chrysene* - 110,000 - - 110,000 250,000 2,100,000 446 507 U 4.83 U 389 J 419 J 880 J 25.6 J 12.0 J 205 U 323 J Dibenz(a,h)anthracene* - 110 - - 110 250 2,100 189 U 195 U 4.83 U 99.6 U 99.9 U 117 J 4.99 U 5.03 U 103 U 103 U Dibenzofuran - 2 - 2.0 - - - 448 195 U 4.83 U 401 J 501 J 100 U 4.99 U 5.03 U 103 U 196 J Fluoranthene - 29,000 - - 2,400,000 48,000,000 30,000,000 897 J 420 4.83 U 669 J 760 J 1,220 J 15.8 J 15.2 J 103 U 382 Fluorene - 29,000 - - 3,100,000 6,300,000 47,000,000 510 J 195 U 4.83 U 446 J 557 J 100 U 4.99 U 5.03 U 103 U 218 Indeno(1,2,3-cd)pyrene* - 1,100 - - 1,100 2,500 21,000 355 J 309 J 4.83 U 333 J 328 J 650 J 29.1 J 17.5 J 103 U 298 1-Methylnaphthalene - - - - - - - 189 U 195 U 4.83 U 99.6 U 99.9 U 100 U 4.99 U 5.03 U 103 U 103 U 2-Methylnaphthalene - - - - - - - 189 U 195 U 4.83 U 99.6 U 99.9 U 100 U 4.99 U 5.03 U 103 U 103 U Naphthalene - 87 - 3,900,000 5,300 25,000 23,000 189 U 195 U 4.83 U 99.6 U 99.9 U 100 U 4.99 U 5.03 U 103 U 103 U Phenanthrene - - - - - - - 497 214 J 4.83 U 403 J 476 J 511 J 5.88 J 5.51 J 103 U 167 J Pyrene - 1,700,000 - - 1,800,000 3,600,000 23,000,000 935 565 4.83 U 697 J 792 J 1,630 J 26.0 J 22.8 J 103 U 482 cPAH TEQ - 110 - - 110 250 2,100 411.76 349.97 7.29 523.15 563.68 1,102.60 36.44 21.55 166.75 486.83

* Carcinogenic PAH U = The compound was not detected above the given laboratory reporting limit J = Laboratory sample results between the Detection Limit and Reporting Limit and/or hold time exceedance. The resulting data was flagged "J" to denote that the result is estimated; the result is considered non-detect at the Method Detection Limit because it falls below the Method Reporting Limit. See Data Validation Summary Report for details.

Bold = Detection above laboratory reporting limits.

Yellow higlighting = concentration exceeds DEQ background/clean fill screening criteria

Red text = concentration exceeds one or more DEQ RBCs and/or Ecological SLVs NA = Not Analyzed "-" = No screening value available.

cPAH TEQ = Carcinogenic Poly Aromatic Hydrocarbon Toxicity Equivalent Quotient, TEZ values calculated using the Washington State Department of Ecology's published guidance "Evaluating the Toxicity and Assessing the Carcinogenic Risk of Environmental Mixtures Using Toxicity Equivalency Factors." Available at https://fortress.wa.gov/ecy/clarc/FocusSheets/tef.pdf. For analytical values reported below reporting limits, the reporting limit was used for calculation of the TEQ.

(a) Oregon Department of Environmental Quality (DEQ), Development of Oregon Background Metals Concentrations in Soil, March 2013 - Portland Basin. Exceedances of Oregon Risk-Based Concentrations and Ecological Screening Levels not applicable if background metals concentrations are not excceded.

(b) DEQ Clean Fill Determinations, last updated 7/23/14.

(c) DEQ Guidance for Ecological Risk Assessment: Levels I, II, III, IV. April 1998, updated Decmeber 2001.

(d) DEQ risk-based concentrations for direct contact, last updated May 2018.

Sparrow-SNS(1.5-4)-SU2 Sparrow-SNS(1.5-4)-SU3Duplicate Sample (Sparrow- SF-DU1 Composite)

Triplicate Sample (Sparrow- SF-DU1 Composite)

Comspoite Surface Soil Sample ResultsIncremental Sampling Methodology (ISM) Sample Results - Depth-Specific Composite Decision Unit

Sparrow-SF-DU1 Composite

Sparrow-SNS-DU1 Composite

Sparrow-DNS-DU1 Composite SS-1 SS-2Sparrow-SNS(1.5-4)-SU1

ISM Sample Results - Depth-Specific Composite Sampling Units

Default Background Concentrationsa

Clean Fill Screening Criteriab

Residential Direct Contract Screening

Valuesd

Urban Residential Direct Contact Screening

Valuesd

Occupational Direct Contract Screening

Valuesd

Ecological Risk Assessment , Level II

Screening Values - Birdsc

Ecological Risk Assessment , Level II Screening Values -

Mammalsc

V:\1857\Active\185750638_MetroBrownfields\05_report_deliv\deliverable\1_Sparrow\Phase II ESA\Table\TABLE 2 - Sparrow 2018 Phase II .xlsx Stantec Consulting Services Inc.

5/31/2018

Figures

Project Location

Client/Project

Figure No.

Title

Oregon

Property Location Map

Sparrow Street Phase I ESA Metro Coalition Brownfield Grant

Notes 1.

2.

Coordinate System: NAD 1983 2011 StatePlane Data Sources Include: ESRI, Metro, Open Street Maps

V:

\1

7\

Ac tiv e\

8\ m xd s\ 0_

Ph as eI\ Sp ar row

Fig 1.m xd

R ev ise d:

-03 -12

By : jb ren ne r

Disclaimer: Stantec assumes no responsibility for data supplied in electronic format. The recipient accepts full responsibility for verifying the accuracy and completeness of the data. The recipient releases Stantec, its officers, employees, consultants and agents, from any and all claims arising in any way from the content or provision of the data.

185750638 Parcel #11E36CC00300-30255 Milwaukie, Oregon

0 0.1 0.2 miles

1:10,000 (At Original document size of 11x17)

Prepared by JB on 2018-03-01 Technical Review by JR on 2018-03-01

Independent Review by CR on 2018-03-01

Legend Approximate Property Area

Client/Project

Figure No.

Title

A

A A

A A

A A

B-1

B-2 B-3

B-4 B-5

B-6 B-7

Site Plan with Sample Locations

Sparrow Street Phase I ESA Metro Coalition Brownfield Grant

Notes 1.

2.

Coordinate System: NAD 1983 2011 StatePlane Data Sources Include: ESRI, Metro, Open Street Maps

V:

\1

7\

Ac tiv e\

8\ mx ds

\0 _P ha se

I\S pa rro wF ig2 (n ew ).m xd

R ev ise d:

-04 -27

By : d ah utc hin s

Disclaimer: Stantec assumes no responsibility for data supplied in electronic format. The recipient accepts full responsibility for verifying the accuracy and completeness of the data. The recipient releases Stantec, its officers, employees, consultants and agents, from any and all claims arising in any way from the content or provision of the data.

185750638 Parcel #11E36CC00300-30255 Milwaukie, Oregon

0 50 100 Feet

1:800 (At Original document size of 11x17)

Prepared by DH on 2018-04-27 Technical Review by JR on 2018-05-01

Independent Review by CR on 2018-05-01

Legend

A

ISM Sample Location

Decision Unit Boundary

2012 Phase II ESA Boring Locations

Composite Sample Location

Approximate Extent of Asphalt

Approximate Property Area

Project Location

SE McLoughlin Boulevard

A p a r t m e n t s

R e s i d e n c e s

R e s i d e n c e s

Milwaukee Orange Light Rail Line

Trolley Trail Bike/Pedestrian Path

Ravine and

Small Creek

Gravel/Soil/Asphalt Piles

Concrete Ties

Homeless Encampment

Landscaping Supplies

Storage Container and Irrigation Piping Supplies

Gravel/Mulch Piles

Garbage (Clothing, Furniture, Food)

Locked Gated Fence/Property EntrySE Sparrow Street

SE

th Av en ue

SU-1

SU-2

SU-3

SS-1

SS-2

PRIMARY

SOURCES

PRIMARY

RELEASE

MECHANISMS

TRANSPORT

MECHANISMS

TERTIARY

SOURCES

EXPOSURE

ROUTES

Current Future

Notes:

+ This route is a primary source of exposure.

- There is no exposure by this route.

Construction/ Excavation

Worker

FIGURE 3

Sparrow Property

Conceptual Site Model

SECONDARY

SOURCES

Residential Ecological (Mammals/

Avian)

Historical Operations Surface Spill

Surface Soils

Subsurface Soils

Dermal Contact Ingestion

Particles/Volatiles Air (Outdoor) Inhalation

Volatilization Air (Indoor)

Air (Outdoor)

Inhalation

Inhalation

Dermal Contact Ingestion

Dermal Contact Ingestion

Particles/Volatiles Air (Outdoor) Inhalation

Leaching Groundwater Ingestion Vol. Inhalation

Appendix A Chain of Custody and Laboratory Reports

AMENDED REPORT

Apex Laboratories, LLC

12232 S.W. Garden Place

Tigard, OR 97223

503-718-2323

EPA ID: OR01039

Stantec Portland

RE: A8D0849 - Sparrow Street-RSM - 185750638

Portland, OR 97225

9400 SW Barnes Rd Ste 200

Carrie Rackey

Thank you for using Apex Laboratories. We greatly appreciate your business and strive to provide the highest quality services to the environmental industry.

Enclosed are the results of analyses for work order A8D0849, which was received by the laboratory on

4/26/2018 at 1:35:00PM.

If you have any questions concerning this report or the services we offer , please feel free to contact me by email at: ldomenighini@apex-labs.com, or by phone at 503-718-2323.

Monday, May 21, 2018

This Final Report is the official version of the data results for this sample submission , unless superseded by a subsequent, labeled amended report.

All other deliverables derived from this data, including Electronic Data Deliverables (EDDs), CLP-like forms, client requested summary sheets, and all other products are considered secondary to this report.

Lisa Domenighini, Client Services Manager

Apex Laboratories The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

12232 S.W. Garden Place

Tigard, OR 97223

503-718-2323

EPA ID: OR01039

Apex Laboratories, LLC

Portland, OR 97225 Carrie Rackey

9400 SW Barnes Rd Ste 200

Sta…