40008.227 Thornton Creek Soil Test Report · PDF fileThornton Creek Elementary School and playfield areas, the levels of lead and arsenic in the ... Total Metals by EPA Method 6020

June 7, 2013

Mike Skutack Seattle Public Schools PO Box 34165, MS 22-331 Seattle, WA 98134

RE: Thornton Creek Elementary School Arsenic and Lead Soil Sampling Results PBS Project #40008.227

Dear Mr. Skutack:

PBS Engineering and Environmental Inc. (PBS) performed soil screening for arsenic and lead at the site of the Thornton Creek Elementary School in Seattle to determine the presence of metal contaminants in the soils. The subject site is located at the present address of 7711 43rd

Avenue Northeast, Seattle, Washington (see Figure 1). The school facility is presently occupied.

BACKGROUND

The Asarco Company operated a copper smelter in Tacoma from 1890 to 1985. Smelter operations emitted an airborne plume of particulates containing arsenic, lead, and other heavy metals over a wide region of Puget Sound. Concentrations of these metals have been found in soils as a result of this contamination. A number of school districts in King and Pierce County have conducted soil testing to determine concentrations of arsenic and lead in areas that are frequently used by children. Seattle School District has contracted with PBS to determine the presence of contaminants at the site of Thornton Creek Elementary School prior to site redevelopment.

SOIL SCREENING FOR ARSENIC AND LEAD

On May 24, 2013, PBS Environmental collected 20 discrete soil samples at 10 locations on the Thornton Creek Elementary School site. The sample locations are shown on Figure 2.

Sample Location Selection The soil sample locations were selected on the school property based on accessible areas reflecting various child activities, land uses, property histories, proposed development, or other factors that may influence which soil is accessible by young children and exposures can occur.

Arsenic and Lead Soil Sampling Thornton Creek Elementary School, Seattle, WA June 7, 2013 Page 2

Collection Method Sample collection started just below any shallow cover layer (e.g., less than 4 inches of sand, or below wood chips). A hand shovel and pick were used to complete 12 inch deep test holes. A soil sample was collected from the ground surface to 6-inch depth, and a second soil sample was collected from 6 to 12 inches below ground surface (bgs). Soil retained for analysis was packed into laboratory-provided containers with zero headspace, sealed and labeled and put on ice in a cooler and chain of custody documentation initiated.

PBS personnel wore disposable nitrile gloves to protect against cross-contamination between samples. All sampling equipment was decontaminated with a detergent and distilled water rinse between each sample location.

Sample Analysis All samples were analyzed for total arsenic and lead using EPA Method 6020. Total arsenic and lead results were reported on a dry weight basis. Therefore, percent moisture (percent solids) will also be determined for each sample to support lab calculations of dry weight concentrations.

Reference: Ecology, 2005. Child Use Area (CUA) Arsenic and Lead Soil Sampling Guidance, Washington State Department of Ecology, Ecology publication #03-09-037 (revised 5-05).

SAMPLE RESULTS

PBS submitted a total of 20 soil samples for laboratory analysis during the investigation activities. Copies of the laboratory reports and sample chain-of-custody forms are presented in Appendix A. Sampling results and applicable cleanup levels are summarized in Table 1. Results of soil analyses performed are summarized below.

The arsenic results in each of the 20 analyzed soil samples were below the Model Toxics Control Act (MTCA) Method A cleanup level for arsenic [20 parts per million (ppm)]. The concentrations of arsenic found in the discrete samples ranged from 2.18 ppm to 9.12 ppm, with an average concentration calculated to be 4.17 ppm and a median concentration of 3.62 ppm, based on the total number of analyzed samples.

The lead results in each of the 20 analyzed soil samples were below the Model Toxics Control Act (MTCA) Method A cleanup level for lead [250 parts per million (ppm)]. The concentrations of lead found in the discrete samples ranged from 2.66 ppm to 68.0 ppm, with an average concentration calculated to be 16.13 ppm and a median concentration of 9.09 ppm, based on the total number of analyzed samples.

Arsenic and Lead Soil Sampling Thornton Creek Elementary School, Seattle, WA June 7, 2013 Page 3

CONCLUSIONS Based on the collection and analysis of soil samples from ten discrete locations from the Thornton Creek Elementary School and playfield areas, the levels of lead and arsenic in the soil are within the Washington Department of Ecology’s MTCA A Soil Limits that are established to be protective of human health.

The soil analysis results do not indicate the need for further assessment or corrective measures related to the regional Arasco Smelter lead and arsenic plume.

LIMITATIONS

PBS has prepared this report for use by the Seattle School District. This report is not intended for use by others without the written consent of SSD. Our interpretation of soil conditions in this study was based on field observations and analytical data from the indicated explorations. Regulated substances may exist in portions of the site that were not explored or analyzed. The conclusions in this report are not be considered a legal opinion as the client’s duty concerning due diligence relating to potential liabilities in leasing, owning, or purchasing real estate.

PBS ENGINEERING AND ENVIRONMENTAL INC.

June 7, 2013 Jake Riley Date Project Manager

Reviewed By:

June 7, 2013 Thomas Mergy, LG Date Environmental Services Manager

Attachments: Figure 1: Vicinity Map Figure 2: Sample Location Map Table 1: Laboratory Results- Soil Appendix A: Laboratory Data

Table 1: Laboratory Results - Soil

Thornton Creek Elementary School/Seattle School District

7711 43rd Avenue Northeast

Seattle, WA

PBS Project #40008.227

Sample Analyses

Sample ID Date

Sampled Sample Analyses (mg/kg)

Number

Depth

(inches) Arsenic Lead

S-1 0-6 5/24/13 9.12 68

6-12 5/24/13 5.97 30.3

S-2 0-6 5/24/13 3.45 4.51

6-12 5/24/13 3.17 4.59

S-3 0-6 5/24/13 3.5 11.5

6-12 5/24/13 2.72 7.64

S-4 0-6 5/24/13 2.52 3.16

6-12 5/24/13 2.18 2.66

S-5 0-6 5/24/13 3.6 13.4

6-12 5/24/13 4.34 10.9

S-6 0-6 5/24/13 4.48 54.6

6-12 5/24/13 4.01 24.7

S-7 0-6 5/24/13 7.44 19.9

6-12 5/24/13 7.97 21.6

S-8 0-6 5/24/13 3.62 8.13

6-12 5/24/13 6.8 8.46

S-9 0-6 5/24/13 4.26 8.04

6-12 5/24/13 3.69 6.21

S-10 0-6 5/24/13 3.13 9.72

6-12 5/24/13 2.37 4.63

Laboratory Detection Limits 2.0 1.0

(1)MTCA Method A Cleanup Level 20 250

(1) MTCA Method A Cleanup Level for Unrestricted Land Uses-Soil

mg/kg Milligrams per kilogram

ND Not detected above laboratory detection limit

3600 Fremont Ave. N.

Seattle, WA 98103

T: (206) 352-3790

F: (206) 352-7178

[email protected]

PBS Engineering & Environmental Tom Mergy

2517 Eastlake Ave, E #100

Seattle, Washington 98102

RE: Thorton Creek Elementary School

Lab ID: 1305183

May 31, 2013

Attention Tom Mergy:

Fremont Analytical, Inc. received 20 sample(s) on 5/24/2013 for the analyses presented in the following report.

Sample Moisture (Percent Moisture) Total Metals by EPA Method 6020

This report consists of the following:

- Case Narrative - Analytical Results - Applicable Quality Control Summary Reports - Chain of Custody

All analyses were performed consistent with the Quality Assurance program of Fremont Analytical, Inc. Please contact the laboratory if you should have any questions about the results.

Thank you for using Fremont Analytical.

Sincerely,

Michelle Clements

Sr. Chemist / Lab Manager

www.fremontanalytical.com

Page 1 of 18

mailto:[email protected]

http://www.fremontanalytical.com

Date: 05/31/2013

CLIENT: PBS Engineering & Environmental Work Order Sample Summary Project: Thorton Creek Elementary School

Lab Order: 1305183

Lab Sample ID Client Sample ID Date/Time Collected Date/Time Received

1305183-001 SB-1-6 05/24/2013 10:19 AM 05/24/2013 4:35 PM

1305183-002 SB-1-12 05/24/2013 10:24 AM 05/24/2013 4:35 PM

1305183-003 SB-2-6 05/24/2013 10:35 AM 05/24/2013 4:35 PM

1305183-004 SB-2-12 05/24/2013 10:45 AM 05/24/2013 4:35 PM

1305183-005 SB-3-6 05/24/2013 11:23 AM 05/24/2013 4:35 PM

1305183-006 SB-3-12 05/24/2013 11:33 AM 05/24/2013 4:35 PM

1305183-007 SB-4-6 05/24/2013 11:05 AM 05/24/2013 4:35 PM

1305183-008 SB-4-12 05/24/2013 11:10 AM 05/24/2013 4:35 PM

1305183-009 SB-5-6 05/24/2013 12:45 PM 05/24/2013 4:35 PM

1305183-010 SB-5-12 05/24/2013 12:50 PM 05/24/2013 4:35 PM

1305183-011 SB-6-6 05/24/2013 9:50 AM 05/24/2013 4:35 PM

1305183-012 SB-6-12 05/24/2013 9:59 AM 05/24/2013 4:35 PM

1305183-013 SB-7-6 05/24/2013 1:20 PM 05/24/2013 4:35 PM

1305183-014 SB-7-12 05/24/2013 1:30 PM 05/24/2013 4:35 PM

1305183-015 SB-8-6 05/24/2013 2:20 PM 05/24/2013 4:35 PM

1305183-016 SB-8-12 05/24/2013 2:30 PM 05/24/2013 4:35 PM

1305183-017 SB-9-6 05/24/2013 2:50 PM 05/24/2013 4:35 PM

1305183-018 SB-9-12 05/24/2013 2:55 PM 05/24/2013 4:35 PM

1305183-019 SB-10-6 05/24/2013 3:10 PM 05/24/2013 4:35 PM

1305183-020 SB-10-12 05/24/2013 3:15 PM 05/24/2013 4:35 PM

Note: If no "Time Collected" is supplied, a default of 12:00AM is assigned

Page 2 of 18

Case Narrative WO#: 1305183

Date: 5/31/2013

CLIENT: PBS Engineering & Environmental

Project: Thorton Creek Elementary School

I. SAMPLE RECEIPT: Samples receipt information is recorded on the attached Sample Receipt Checklist.

II. GENERAL REPORTING COMMENTS: Results are reported on a wet weight basis unless dry-weight correction is denoted in the units field on the analytical report ("mg/kg-dry" or "ug/kg-dry").

Matrix Spike (MS) and MS Duplicate (MSD) samples are tested from an analytical batch of "like" matrix to check for possible matrix effect. The MS and MSD will provide site specific matrix data only for those samples which are spiked by the laboratory. The sample chosen for spike purposes may or may not have been a sample submitted in this sample delivery group. The validity of the analytical procedures for which data is reported in this analytical report is determined by the Laboratory Control Sample (LCS) and the Method Blank (MB). The LCS and the MB are processed with the samples and the MS/MSD to ensure method criteria are achieved throughout the entire analytical process.

III. ANALYSES AND EXCEPTIONS: Exceptions associated with this report will be footnoted in the analytical results page(s) or the quality control summary page(s) and/or noted below.

Page 3 of 18

Analytical Report

WO#: 1305183

Date Reported: 5/31/2013



Lab ID: 1305183-001

Client Sample ID: SB-1-6

Analyses Result

Total Metals by EPA Method 6020

Arsenic 9.12

Lead 68.0

Sample Moisture (Percent Moisture)

Percent Moisture 16.5

Lab ID: 1305183-002


Analyses Result


Arsenic 5.97

Lead 30.3



RL Qual

0.0936

0.187

RL Qual

0.0919

0.184

Collection Date: 5/24/2013 10:19:00 AM

Matrix: Soil

Units DF Date Analyzed

Batch ID: 4692 Analyst: MC

mg/Kg-dry 1 5/30/2013 1:09:52 AM

mg/Kg-dry 1 5/30/2013 1:09:52 AM

Batch ID: R8645 Analyst: JS

wt% 1 5/29/2013 10:29:15 AM


Matrix: Soil



mg/Kg-dry 1 5/30/2013 2:26:35 AM

mg/Kg-dry 1 5/30/2013 2:26:35 AM


wt% 1 5/29/2013 10:29:15 AM

Qualifiers: B

E

J

RL

Analyte detected in the associated Method Blank

Value above quantitation range

Analyte detected below quantitation limits

Reporting Limit

D

H

ND

S

Dilution was required

Holding times for preparation or analysis exceeded

Not detected at the Reporting Limit

Spike recovery outside accepted recovery limits

Page 4 of 18

Analytical Report

WO#: 1305183




Lab ID: 1305183-003


Analyses Result


Arsenic 3.45

Lead 4.51



Lab ID: 1305183-004


Analyses Result


Arsenic 3.17

Lead 4.59



RL Qual

0.0863

0.173

RL Qual

0.0847

0.169


Matrix: Soil



mg/Kg-dry 1 5/30/2013 2:37:17 AM

mg/Kg-dry 1 5/30/2013 2:37:17 AM


wt% 1 5/29/2013 10:29:15 AM


Matrix: Soil



mg/Kg-dry 1 5/30/2013 2:48:00 AM

mg/Kg-dry 1 5/30/2013 2:48:00 AM


wt% 1 5/29/2013 10:29:15 AM

Qualifiers: B

E

J

RL




Reporting Limit

D

H

ND

S





Page 5 of 18

Analytical Report

WO#: 1305183




Lab ID: 1305183-005


Analyses Result


Arsenic 3.50

Lead 11.5



Lab ID: 1305183-006


Analyses Result


Arsenic 2.72

Lead 7.64



RL Qual

0.0875

0.175

RL Qual

0.0855

0.171


Matrix: Soil



mg/Kg-dry 1 5/30/2013 3:29:09 AM

mg/Kg-dry 1 5/30/2013 3:29:09 AM


wt% 1 5/29/2013 10:29:15 AM


Matrix: Soil



mg/Kg-dry 1 5/30/2013 3:39:52 AM

mg/Kg-dry 1 5/30/2013 3:39:52 AM


wt% 1 5/29/2013 10:29:15 AM

Qualifiers: B

E

J

RL




Reporting Limit

D

H

ND

S





Page 6 of 18

Analytical Report

WO#: 1305183




Lab ID: 1305183-007


Analyses Result


Arsenic 2.52

Lead 3.16



Lab ID: 1305183-008


Analyses Result


Arsenic 2.18

Lead 2.66



RL Qual

0.0875

0.175

RL Qual

0.0872

0.174


Matrix: Soil



mg/Kg-dry 1 5/30/2013 3:50:34 AM

mg/Kg-dry 1 5/30/2013 3:50:34 AM


wt% 1 5/29/2013 10:29:15 AM


Matrix: Soil



mg/Kg-dry 1 5/30/2013 4:01:16 AM

mg/Kg-dry 1 5/30/2013 4:01:16 AM


wt% 1 5/29/2013 10:29:15 AM

Qualifiers: B

E

J

RL




Reporting Limit

D

H

ND

S





Page 7 of 18

Analytical Report

WO#: 1305183




Lab ID: 1305183-009


Analyses Result


Arsenic 3.60

Lead 13.4



Lab ID: 1305183-010


Analyses Result


Arsenic 4.34

Lead 10.9



RL Qual

0.0905

0.181

RL Qual

0.0905

0.181

Collection Date: 5/24/2013 12:45:00 PM

Matrix: Soil



mg/Kg-dry 1 5/30/2013 4:11:59 AM

mg/Kg-dry 1 5/30/2013 4:11:59 AM


wt% 1 5/29/2013 10:29:15 AM


Matrix: Soil



mg/Kg-dry 1 5/30/2013 4:22:41 AM

mg/Kg-dry 1 5/30/2013 4:22:41 AM


wt% 1 5/29/2013 10:29:15 AM

Qualifiers: B

E

J

RL




Reporting Limit

D

H

ND

S





Page 8 of 18

Analytical Report

WO#: 1305183




Lab ID: 1305183-011


Analyses Result


Arsenic 4.48

Lead 54.6



Lab ID: 1305183-012


Analyses Result


Arsenic 4.01

Lead 24.7



RL Qual

0.0829

0.166

RL Qual

0.0853

0.171


Matrix: Soil



mg/Kg-dry 1 5/30/2013 4:33:24 AM

mg/Kg-dry 1 5/30/2013 4:33:24 AM


wt% 1 5/29/2013 10:29:15 AM


Matrix: Soil



mg/Kg-dry 1 5/30/2013 4:44:06 AM

mg/Kg-dry 1 5/30/2013 4:44:06 AM


wt% 1 5/29/2013 10:29:15 AM

Qualifiers: B

E

J

RL




Reporting Limit

D

H

ND

S





Page 9 of 18

Analytical Report

WO#: 1305183




Lab ID: 1305183-013


Analyses Result


Arsenic 7.44

Lead 19.9



Lab ID: 1305183-014


Analyses Result


Arsenic 7.97

Lead 21.6



RL Qual

0.0895

0.179

RL Qual

0.0892

0.178


Matrix: Soil



mg/Kg-dry 1 5/30/2013 4:54:49 AM

mg/Kg-dry 1 5/30/2013 4:54:49 AM


wt% 1 5/29/2013 10:29:15 AM


Matrix: Soil



mg/Kg-dry 1 5/30/2013 5:05:32 AM

mg/Kg-dry 1 5/30/2013 5:05:32 AM


wt% 1 5/29/2013 10:29:15 AM

Qualifiers: B

E

J

RL




Reporting Limit

D

H

ND

S





Page 10 of 18

Analytical Report

WO#: 1305183




Lab ID: 1305183-015


Analyses Result


Arsenic 3.62

Lead 8.13



Lab ID: 1305183-016


Analyses Result


Arsenic 6.80

Lead 8.46



RL Qual

0.0874

0.175

RL Qual

0.0867

0.173


Matrix: Soil



mg/Kg-dry 1 5/30/2013 5:46:42 AM

mg/Kg-dry 1 5/30/2013 5:46:42 AM


wt% 1 5/29/2013 10:29:15 AM


Matrix: Soil



mg/Kg-dry 1 5/30/2013 5:57:25 AM

mg/Kg-dry 1 5/30/2013 5:57:25 AM


wt% 1 5/29/2013 10:29:15 AM

Qualifiers: B

E

J

RL




Reporting Limit

D

H

ND

S





Page 11 of 18

Analytical Report

WO#: 1305183




Lab ID: 1305183-017


Analyses Result


Arsenic 4.26

Lead 8.04



Lab ID: 1305183-018


Analyses Result


Arsenic 3.69

Lead 6.21



RL Qual

0.0835

0.167

RL Qual

0.0869

0.174


Matrix: Soil



mg/Kg-dry 1 5/30/2013 6:08:08 AM

mg/Kg-dry 1 5/30/2013 6:08:08 AM


wt% 1 5/29/2013 10:29:15 AM


Matrix: Soil



mg/Kg-dry 1 5/30/2013 6:18:50 AM

mg/Kg-dry 1 5/30/2013 6:18:50 AM


wt% 1 5/29/2013 10:29:15 AM

Qualifiers: B

E

J

RL




Reporting Limit

D

H

ND

S





Page 12 of 18

Analytical Report

WO#: 1305183




Lab ID: 1305183-019


Analyses Result


Arsenic 3.13

Lead 9.72



Lab ID: 1305183-020


Analyses Result


Arsenic 2.37

Lead 4.63



RL Qual

0.0894

0.179

RL Qual

0.0856

0.171


Matrix: Soil



mg/Kg-dry 1 5/30/2013 6:29:33 AM

mg/Kg-dry 1 5/30/2013 6:29:33 AM


wt% 1 5/29/2013 10:29:15 AM


Matrix: Soil



mg/Kg-dry 1 5/30/2013 6:40:16 AM

mg/Kg-dry 1 5/30/2013 6:40:16 AM


wt% 1 5/29/2013 10:29:15 AM

Qualifiers: B

E

J

RL




Reporting Limit

D

H

ND

S





Page 13 of 18

Date: 5/31/2013

Work Order: 1305183



Sample ID: MB-4692 SampType: MBLK

Client ID: MBLKS Batch ID: 4692

Analyte Result RL

Arsenic ND 0.100

Lead ND 0.200

SPK value

Units: mg/Kg

SPK Ref Val %REC

QC SUMMARY REPORT


Prep Date: 5/29/2013 RunNo: 8674

Analysis Date: 5/30/2013 SeqNo: 173668

LowLimit HighLimit RPD Ref Val %RPD RPDLimit Qual

Sample ID:

Client ID:

Analyte

Arsenic

Lead

LCS-4692

LCSS

SampType: LCS

Batch ID: 4692

Result

103

70.4

RL

0.100

0.200

SPK value

102.0

71.80

Units: mg/Kg

SPK Ref Val

0

0

%REC

101

98.0

Prep Date: 5/29/2013

Analysis Date: 5/30/2013

LowLimit HighLimit RPD Ref Val

83.4 116

84.3 116

RunNo: 8674

SeqNo: 173671

%RPD RPDLimit Qual

Sample ID:

Client ID:

Analyte

Arsenic

Lead

1305183-001ADUP

SB-1-6

SampType: DUP

Batch ID: 4692

Result

11.9

80.2

RL

0.0944

0.189

SPK value

Units: mg/Kg-dry

SPK Ref Val %REC




9.120

68.04

RunNo: 8674

SeqNo: 173673

%RPD RPDLimit

26.9 30

16.4 30

Qual

Sample ID:

Client ID:

Analyte

Arsenic

Lead

1305183-001AMS

SB-1-6

SampType: MS

Batch ID: 4692

Result

56.7

93.4

RL

0.0915

0.183

SPK value

45.74

22.87

Units: mg/Kg-dry

SPK Ref Val %REC

9.120 104

68.04 111




75 125

75 125

RunNo: 8674

SeqNo: 173675

%RPD RPDLimit Qual

Qualifiers: B Analyte detected in the associated Method Blank D Dilution was required E Value above quantitation range

H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits ND Not detected at the Reporting Limit

R RPD outside accepted recovery limits RL Reporting Limit S Spike recovery outside accepted recovery limits

Page 14 of 18

Date: 5/31/2013

Work Order:

CLIENT:

Project:

1305183

PBS Engineering & Environmental

Thorton Creek Elementary School

QC SUMMARY REPORT


Sample ID:

Client ID:

Analyte

1305183-001AMSD

SB-1-6

SampType: MSD

Batch ID: 4692

Result RL SPK value

Units: mg/Kg-dry

SPK Ref Val %REC




RunNo: 8674

SeqNo: 173676

%RPD RPDLimit Qual

Arsenic

Lead

63.7

96.2

0.0915

0.183

45.74

22.87

9.120

68.04

119

123

75

75

125

125

56.75

93.37

11.6

3.00

30

30

Qualifiers: B Analyte detected in the associated Method Blank D Dilution was required E Value above quantitation range

H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits ND Not detected at the Reporting Limit

R RPD outside accepted recovery limits RL Reporting Limit S Spike recovery outside accepted recovery limits

Page 15 of 18

Page 1 of 1

Page 16 of 18

Client Name: PBS Work Order Number: 1305183

Date Received: 5/24/2013 4:35:00 PM Logged by: Chelsea Ward

Chain of Custody

1. Were custodial seals present? Yes No Not Required

2. Is Chain of Custody complete? Yes No Not Present

3. How was the sample delivered? Client

Log In

4. Coolers are present? Yes No NA

5. Was an attempt made to cool the samples? Yes No NA

6. Were all coolers received at a temperature of >0° C to 10.0°C Yes No NA

7. Sample(s) in proper container(s)? Yes No

8. Sufficient sample volume for indicated test(s)? Yes No

9. Are samples properly preserved? Yes No

10. Was preservative added to bottles? Yes No NA

11. Is there headspace present in VOA vials? Yes No NA

12. Did all sample containers arrive in good condition?(unbroken) Yes No

13. Does paperwork match bottle labels? Yes No

14. Are matrices correctly identified on Chain of Custody? Yes No

15. Is it clear what analyses were requested? Yes No

16. Were all holding times able to be met? Yes No

Special Handling (if applicable)

17. Was client notified of all discrepancies with this order? Yes No NA

Person Notified:

By Whom:

Regarding:

Client Instructions:

Date:

Via: eMail Phone Fax In Person

Item Information

Item # Temp ºC Condition

Cooler 8.8 Good

Sample 8.1 Good

Sample Log-In Check List

18. Additional remarks/Disrepancies

Page 17 of 18

Page 18 of 18

Documents

40008.227 Thornton Creek Soil Test Report · PDF fileThornton Creek Elementary School and playfield areas, the levels of lead and arsenic in the ... Total Metals by EPA Method 6020