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Golder, Golder Associates and the GA globe design are trademarks of Golder Associates Corporation HAZARDOUS MATERIALS SURVEY Keller Property 18816 NE 84th Street Redmond, Washington Submitted To: City of Redmond 15670 NE 85th Street Redmond, WA 98052 Submitted By: Golder Associates Inc. 18300 NE Union Hill Road, Suite 200 Redmond, WA 98052 USA April 5, 2016 Project No. 1403741-621.002 REPORT ---PAGE BREAK--- April 2017 i 1403741-621.[PHONE REDACTED]-r-keller property haz mat survey-rev1-2017-05-04.docx Table of Contents 1.0 INTRODUCTION 1 1.1 Site Description 1 2.0 HAZARDOUS MATERIALS SURVEY 2 2.1 Asbestos-Containing Building Material Field Survey 2 2.2 Lead-in-Paint Survey 3 3.0 RESULTS OF THE HAZARDOUS MATERIALS SURVEY 4 3.1 Summary of Asbestos Results 4 3.2 Summary of Lead-in-Paint Results 4 4.0 CLOSING 5 List of Tables (in text) Table 2-1 Sampled Suspect Asbestos-Containing Building Materials Table 3-1 Results of Total Lead-in-Paint Analysis List of Appendices Appendix A Laboratory Analytical Reports ---PAGE BREAK--- April 2017 1 1403741-621.[PHONE REDACTED]-r-keller property haz mat survey-rev1-2017-05-04.docx 1.0 INTRODUCTION City of Redmond (Redmond) retained Golder Associates Inc. (Golder) to conduct a Hazardous Materials Survey (Survey) of the structures located at 18816 NE 84th Street, Redmond, Washington (the Subject Property). The Survey was in support of the future demolition of the existing Subject Property structures. This Survey conforms to the regulatory requirements for building renovation, remodeling, or demolition as regulated by the Puget Sound Clean Air Agency (PSCAA) and Washington State Department of Labor and Industries The purpose of the asbestos survey was to identify building materials that contained greater than 1% asbestos. Materials containing greater than 1% asbestos are classified as asbestos-containing material (ACM) in accordance with Washington State and Federal regulations. In accordance with Washington State regulations the following apply: Removal of all ACM from the building is required before demolition activities can occur. Only a licensed asbestos abatement contractor using appropriately trained workers can remove ACM from the building. The purpose of the lead-in-paint survey was to identify the major paint types that contain lead in order to inform future contractors and workers of potential lead exposures that may occur during demolition, in accordance with Washington State L&I regulations. The United States Environmental Protection Agency (EPA) defines lead-based paint as containing greater than or equal to 5,000 parts per million (ppm) lead, equivalent to >0.5% lead. The information from the lead-in-paint survey should be used by a demolition or construction contractor to ensure adequate personal protective measures, medical surveillance, and engineering controls, as required, are implemented in accordance with L&I regulations. Results from the lead-in-paint survey can also be used to determine if resulting demolition debris could potentially be classified as a dangerous waste in accordance with the Washington State Department of Ecology (Ecology) Dangerous Waste Regulations (WAC 173-303). 1.1 Site Description The Subject Property includes a one-story wood-frame single family home with 880 gross square feet built in 1932. The home has a basement. A separate wood-frame garage is located next to the house on the eastern side of the Subject Property. ---PAGE BREAK--- April 2017 2 1403741-621.[PHONE REDACTED]-r-keller property haz mat survey-rev1-2017-05-04.docx 2.0 HAZARDOUS MATERIALS SURVEY 2.1 Asbestos-Containing Building Material Field Survey Golder conducted the survey and sampling at the Subject Property on January 31, 2017. The house and garage were vacant and unoccupied at the time of the survey. Neil Gilham, an accredited Asbestos Hazard Emergency Response Act (AHERA) Building Inspector, conducted the survey. The field survey included a visual review of accessible areas to identify suspect materials for sampling. Golder recorded each collected sample in a table, giving each sample a unique identification number, and recording each sample’s identification number, location, material description, friability, and estimated quantity. Golder placed each collected sample into a plastic Ziploc sample bag and labeled each sample bag with the sample identification number. Golder collected 44 bulk samples during the field survey. Golder submitted the bulk samples to Seattle Asbestos Test, LLC (SAT) in Washington using standard chain-of-custody protocol. SAT is a National Voluntary Laboratory Accreditation Program (NVLAP)-accredited laboratory (NVLAP Lab Code 200768). SAT analyzed the bulk samples using polarized light microscopy (PLM) methods (EPA-600/R- 93/116 Test Method for the Determination of Asbestos in Bulk Insulation Samples). Table 2-1 lists all of the samples collected and analyzed and includes the sample identification numbers, locations, and material descriptions. Appendix A contains the laboratory analytical reports. Table 2-1: Sampled Suspect Asbestos-Containing Building Materials Material Sample Numbers Location(s) Plaster - wall 001, 009, 012, 025 Throughout house Plaster - ceiling 002, 010, 020, 026 Throughout house Floor tile (12”x12”) and mastic 003, 016, 017, 022, 024 Living room, hall, kitchen, bathroom Linoleum/vinyl flooring with felt- like backing 018, 021 Kitchen, bedroom Multiple-layered flooring 011 Dining room Paper underlayment under wood flooring 023 Throughout house Acoustic ceiling panel, 2’ x 4’ 013, 014, 015 Kitchen “Rock wool” insulation 029, 030, 031, 041 Attic and exterior wall cavities Tar paper 034, 035, 036 Exterior walls under wood siding Fiberglass batt insulation with paper backing 027, 032 Attic and basement Aluminized paper 028 Attic ---PAGE BREAK--- April 2017 3 1403741-621.[PHONE REDACTED]-r-keller property haz mat survey-rev1-2017-05-04.docx Brick 004, 007, 043 Chimney, hearth, and fireplace Mortar 005, 008, 044 Chimney, hearth, and fireplace Cement material 006 Fireplace mantle Roofing shingles 033, 037, 038, 039, 040, 042 House and garage roof; loose stack in basement 2.2 Lead-in-Paint Survey Accessible areas of buildings were surveyed for lead in paint. Samples were identified based on their surface color and substrate. The samples collected included all layers of paint down to the substrate. Golder collected 5 paint chip samples (Table 3-1). Paint samples were chipped from the substrate and placed into plastic bags. Each sample was assigned a unique identification number before delivery to OnSite Environmental Inc. (OnSite Environmental) for analysis for total lead using EPA Method 6010C. Appendix A contains the laboratory analytical reports. ---PAGE BREAK--- April 2017 4 1403741-621.[PHONE REDACTED]-r-keller property haz mat survey-rev1-2017-05-04.docx 3.0 RESULTS OF THE HAZARDOUS MATERIALS SURVEY 3.1 Summary of Asbestos Results Asbestos was not detected in any of the materials sampled. Some unsampled materials may exist beyond the limits of visual observation or limited destructive sampling. Golder attempted to locate and access areas where suspect materials could be concealed. The likelihood is low that unsampled suspect materials may be present based on Golder’s experience with buildings of similar age and construction. 3.2 Summary of Lead-in-Paint Results The EPA defines lead-based paint as greater than or equal to 5,000 ppm lead, equivalent to >0.5% lead. Lead was detected in all paint chip samples at concentrations greater than the laboratory practical quantitation limit (PQL). The PQL was well below 5,000 ppm (or 0.5%) lead. Table 3-1: Results of Total Lead-in-Paint Analysis Sample No. Location Color / Substrate Lead Concentration (mg/kg or ppm) Percent Lead Pb-001 House exterior – northeast corner Light gray/wood shingle siding 28 0.0028 Pb-002 House exterior – northeast corner Blue gray/wood window frame 100,000 10 Pb-003 House exterior – north side porch ceiling Light gray/wood 14,000 1.4 Pb-004 House exterior – north side porch beam Blue gray/wood beam 87,000 8.7 Pb-005 House exterior – east side Light gray/wood shingle siding 36 0.0036 Note: Bold = greater than or equal to 5,000 ppm lead, equivalent to >0.5% lead Three samples (Pb-002, Pb-003, Pb-004) contained lead concentrations greater than or equal to the 5,000 ppm level that defines lead-based paint. These samples were collected from building components (e.g. window frames) that make up a very small percentage of the overall structure mass and therefore would not cause the demolition debris to characterize as a dangerous waste. Some of the paint was observed as cracked and flaking. Precautions and controls are recommended during demolition to control dust and the spreading of lead-based paint to surrounding surface soils. The demolition contractor should provide adequate personal protective measures, medical surveillance, and engineering controls, as required, in accordance with L&I regulations. ---PAGE BREAK--- April 2017 5 1403741-621.[PHONE REDACTED]-r-keller property haz mat survey-rev1-2017-05-04.docx 4.0 CLOSING Golder Associates Inc. appreciates the opportunity to provide our services to the City of Redmond. If you have any questions regarding this report, please contact us at (425) 883-0777. GOLDER ASSOCIATES INC. Douglas G. Dunster Principal and Senior Consultant Neil R. Gilham, LG Senior Environmental Scientist Asbestos Building Inspector Certification Number: 1626209 Expires: April 12, 2018 NRG/DGD/sb ---PAGE BREAK--- APPENDIX A LABORATORY ANALYTICAL REPORTS ---PAGE BREAK--- OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 February 9, 2017 Neil Gilham Golder Associates Inc. 18300 NE Union Hill Road, Suite 200 Redmond, WA 98052-3333 Re: Analytical Data for Project 1403741-621 Laboratory Reference No. 1702-001 Dear Neil: Enclosed are the analytical results and associated quality control data for samples submitted on February 1, 2017. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures ---PAGE BREAK--- 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 9, 2017 Samples Submitted: February 1, 2017 Laboratory Reference: 1702-001 Project: 1403741-621 Case Narrative Samples were collected on January 31, 2017 and received by the laboratory on February 1, 2017. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. ---PAGE BREAK--- 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 9, 2017 Samples Submitted: February 1, 2017 Laboratory Reference: 1702-001 Project: 1403741-621 TOTAL LEAD EPA 6010C Matrix: Paint Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-001-01 Client ID: Pb-001 Lead 28 20 6010C 2-8-17 2-8-17 Lab ID: 02-001-02 Client ID: Pb-002 Lead 100000 950 6010C 2-8-17 2-8-17 Lab ID: 02-001-03 Client ID: Pb-003 Lead 14000 92 6010C 2-8-17 2-8-17 Lab ID: 02-001-04 Client ID: Pb-004 Lead 87000 990 6010C 2-8-17 2-8-17 Lab ID: 02-001-05 Client ID: Pb-005 Lead 36 19 6010C 2-8-17 2-8-17 ---PAGE BREAK--- 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 9, 2017 Samples Submitted: February 1, 2017 Laboratory Reference: 1702-001 Project: 1403741-621 TOTAL LEAD EPA 6010C METHOD BLANK QUALITY CONTROL Date Extracted: 2-8-17 Date Analyzed: 2-8-17 Matrix: Paint Units: mg/kg (ppm) Lab ID: MB0208PH1 Analyte Method Result PQL Lead 6010C ND 20 ---PAGE BREAK--- 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 9, 2017 Samples Submitted: February 1, 2017 Laboratory Reference: 1702-001 Project: 1403741-621 TOTAL LEAD EPA 6010C SB/SBD QUALITY CONTROL Date Extracted: 2-8-17 Date Analyzed: 2-8-17 Matrix: Paint Units: mg/kg (ppm) Lab ID: SB0208PH1 Spike Percent Percent Analyte Level SB Recovery SBD Recovery RPD Flags Lead 1000 986 99 977 98 1 ---PAGE BREAK--- 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-napthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a Sulfuric acid/Silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in method 8260C, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK--- Golder, Golder Associates and the GA globe design are trademarks of Golder Associates Corporation Golder Associates Inc. 18300 NE Union Hill Road, Suite 200 Redmond, WA 98052 USA Tel: (425) 883-0777 Fax: (425) 882-5498