Document Moscow_doc_9de7c06130

www.terragraphics.com Corporate Office: 121 S. Jackson St., Moscow, Idaho 83843 Ph: (208) 882-7858; Fax: (208) 883-3785 Other Office Locations: Kellogg, Idaho Boise, Idaho Deer Lodge, Montana Las Vegas, Nevada Pasco, Washington M E M O R A N D U M To: Bill Belknap, City of Moscow, Moscow Kyle Steele, City of Moscow, Moscow From: John Means, TerraGraphics, Boise Robin Nimmer, TerraGraphics, Moscow Date: August 18 2016 Project Code: 16040-03 Subject: Dumas Seed Facility Soil Stockpile Sample Results 1 Introduction The Dumas Seed Facility, located at 103 North Almon Street (hereinafter referred to as the “Site”), is bounded to the north by West A Street, to the east by North Almon Street, to the west by North Asbury Street, and to the south by residential properties in Moscow, Idaho (Figure The Site was used as a grain, pea, and lentil processing and storage facility that had operated for at least 100 years. Pesticides, rodenticides, fumigants, and possibly fungicides may have been repeatedly applied to and around the exteriors of the Site structures (TerraGraphics, 2007; Tetra Tech, 2012). 2 Historical Environmental Site Assessment Activities Through the U.S. Environmental Protection Agency (USEPA) Brownfields Assessment Coalition Grant held by the City of Moscow, several environmental site assessments (ESAs) have been conducted at the Site. A summary list of these assessments funded through the grant is as follows (TerraGraphics, 2016a): 1. February 2012 – Conducted Phase I ESA. 2. April 2012 – Conducted Phase II ESA. Collected surface soil samples, advanced borings and collected subsurface soil samples, installed monitoring wells, and sampled groundwater. 3. October 2012 – Conducted supplemental Phase II ESA. Divided the Site into three decision units (DUs): north DU (NDU), south DU (SDU), and railroad line DU (RDU) (Figure Conducted surface soil sampling. 4. June/July 2013 – Conducted supplemental Phase II ESA. Divided the NDU into six DUs: DUs 1 to 6 surrounding the structures (Figure Conducted surface soil sampling. ---PAGE BREAK--- Soil Stockpile Sampling at the Dumas Seed Site Page 2 of 9 5. December 2015 – Conducted supplemental Phase II ESA. Divided the NDU into four more DUs under the dismantled buildings: 7 to 10. Conducted surface soil sampling. DUs 4 and 5 had dieldrin concentrations above the USEPA residential regional screening level (RSL). TerraGraphics conducted a Risk Evaluation (RE-1) on dieldrin concentrations from DUs 4 and 5 using the Risk Evaluation Manual (REM) model (IDEQ, 2004). Modeling results show dieldrin concentrations exceeded the acceptable risk for the residential (child and age-adjusted) receptors at DU-4, although the risk concentrations were acceptable for the non-residential and construction worker receptors. The non-cancer risk for all receptors was not exceeded. Modeling results for DU-5 indicated acceptable risk for residential, non-residential, and construction worker receptors. Based on the RE-1 results of DU-4, TerraGraphics recommended selecting one of the following options for reducing risk at DU-4: 1. Limit the Site to industrial use through a deed restriction. 2. Implement institutional controls barriers) to break the dermal and ingestion pathway. 3. Remove and properly dispose of contaminated surface soils from within DU-4. The Site property owners removed the upper approximately 1-foot of soil from DU-4 and stockpiled it in two piles adjacent to the DU on April 20, 2016. TerraGraphics (2016b) describes the soil stockpiling activities. 3 Soil Stockpile Sampling On June 8, 2016, TerraGraphics collected samples from the two DU-4 soil stockpiles for disposal requirement purposes. The field crew followed the Interstate Technology Regulatory Council (ITRC) Incremental Sampling Methodology (ISM) (ITRC, 2012) for sampling stockpiles. They used a shovel and/or skidsteer to reduce and flatten the two piles to a maximum thickness of approximately 3 feet following the ISM guideline, and collected 3 samples of 30 subsamples each (equally from each pile). The samples were collected in triplicate so there would be three replicate samples in order to evaluate the sampling, preparation, and analytical process variability. The field crew delivered the three soil samples to Anatek Labs, Inc. in Moscow, Idaho. The laboratory analyzed the samples for the following constituents as a pre-disposal requirement with the local landfill, Asotin County Landfill, located near Clarkston, Washington:  Dieldrin  Resource, Conservation, and Recovery Act (RCRA) 8 metals  pH  Total petroleum hydrocarbons (diesel, lube oil, and gasoline)  Benzene, total xylenes, toluene, and naphthalene (BTEXN) ---PAGE BREAK--- Soil Stockpile Sampling at the Dumas Seed Site Page 3 of 9 4 Soil Stockpile Results Table 1 lists the laboratory results and the summary statistics of the ISM. Appendix A contains the laboratory results. The coefficient of variation (CV) or relative standard deviation (RSD) values indicate a relatively high variability/dispersion for most of the detected metals and toluene; therefore, the 95% UCL values, which are elevated compared to the mean and individual concentrations to account for the uncertainty in such a small sample size, is a more conservative concentration to base decisions upon. Arsenic, lead, mercury, and dieldrin concentrations in at least one replicate sample exceed the IDEQ Idaho initial default target levels (IDTLs; IDEQ, 2004). Only dieldrin and arsenic concentrations also exceed the USEPA screening levels (USEPA, 2016). However, arsenic concentrations are below the background concentrations for eastern Washington (Ecology, 1994). The IDTLs for lead and mercury are based on groundwater protection for the critical pathway and critical receptor; however, groundwater concentrations were either not detected or detected below the screening level (Tetra Tech, 2013). Dieldrin concentrations ranged from 0.207 to 0.279 milligrams per kilogram (mg/kg) and exceed the landfill disposal criteria of less than 0.13 mg/kg. The Asotin County Landfill will therefore not accept the soil in the stockpiles. Given the residential screening level exceedance of dieldrin, TerraGraphics conducted a risk evaluation, described in Section 6, to determine if the soil is within the acceptable risk for remaining on Site. 5 Quality Control TerraGraphics conducted a quality control review of the soil data. The following are items of note:  TerraGraphics qualified the m+p xylenes concentration in the second replicate sample because the concentration was between the method detection limit and the practical quantitation limit.  The laboratory could not detect below the screening level for mercury.  All laboratory control, matrix spike, matrix spike duplicate, and method blank samples are within the method guidelines. TerraGraphics considers the dataset from the June 8, 2016 stockpile soil sampling to be of acceptable quality based on results from the field and laboratory quality control samples. 6 Risk Evaluation A Site-specific Risk Evaluation (RE) was completed because dieldrin, the Site contaminant of concern (COC), results from the excavated stockpile remain above the USEPA residential RSL of 0.034 mg/kg, as discussed in Section 4.0 of this report. The purposes of this RE are to evaluate potential risk to human receptors at the Site, and help determine whether ---PAGE BREAK--- Soil Stockpile Sampling at the Dumas Seed Site Page 4 of 9 remediation actions are necessary. Results of this RE are to be used by the owner for the decision-making process. Attachment A includes supporting documentation for the RE. 6.1 Current and Future Land Use The Site is located near the downtown area of Moscow, Idaho. Currently, the Site is vacant except for a brick structure and a few pieces of equipment. The Site is for sale, and future plans are unknown. 6.2 Data and Chemicals of Concern Included in the Risk Evaluation Data used in this RE are from the excavated and stockpiled soils sampled for dieldrin following guidelines from the ISM (ITRC, 2012) because dieldrin is the chemical of concern. The percent RSDs or CV for the replicate samples were calculated by dividing the mean by the standard deviation (Table The RSD was below 30% and indicates the replicate is providing a reproducible estimate of the average dieldrin concentration of the stockpile (Section 7.3, ITRC, 2012); therefore, the maximum concentration is considered adequate to use in the risk evaluation. 6.3 Exposure Assessment The exposure assessment defines the amount and routes of receptor exposure to site-related COCs. The exposure assessment considers both current and likely future Site uses. Exposure point concentrations (EPCs) representative of upper-bound exposure conditions in each affected medium are also estimated in the exposure assessment. 6.3.1 Site Conceptual Model A Site Conceptual Model (SCM) describes potential chemical sources, release mechanisms, environmental transport processes, exposure routes, and receptors at the Site. The purpose of this SCM is to describe the routes or pathways by which humans may be exposed to contaminants at the Site. Exposure can occur when contaminants migrate from the source to an exposure point where a receptor comes into direct contact with contaminated media. A complete exposure pathway consists of four necessary elements: 1) a source and mechanism of chemical release to the environment, 2) an environmental transport medium for a released chemical, 3) a point of potential human contact with the impacted medium (referred to as the exposure point), and 4) an exposure route at the exposure point soil ingestion). No exposure (and therefore no risk) exists unless the exposure pathway is complete. Receptors and exposure routes included as part of this RE are summarized in the following subsections. ---PAGE BREAK--- Soil Stockpile Sampling at the Dumas Seed Site Page 5 of 9 6.3.2 Receptors Based on unknown future Site use, the potential human receptors evaluated in this RE are future residential (child and age-adjusted) receptors, non-residential receptors, and construction worker receptors. 6.3.3 Route of Exposure Exposure pathways that are considered complete and are quantified as part of this RE include the following:  Surficial soil. Surficial soil can be transported via wind erosion/dispersion or volatilized and inhaled by the receptor (ATSDR, 2002). Receptors can also come in contact to dieldrin-contaminated soil dermally or through ingestion. However, this pathway can be incomplete if a permanent barrier is put into place.  Subsurface soil. During construction, receptors can come in contact to dieldrin- contaminated soil dermally or through ingestion. This pathway will become incomplete when construction activities cease and if a permanent barrier is put into place. The following pathways are considered incomplete exposure routes and were not quantified in this RE:  Groundwater. Although the critical pathway for dieldrin is groundwater (IDEQ, 2004), dieldrin is not very water soluble and is rarely leached into deeper soil layers and groundwater (ATSDR, 2002). As shown in a past Site assessment, dieldrin has not been detected in groundwater samples (Tetra Tech, 2013). Additionally, the Site is and will continue to be connected to the City’s municipal water system. 6.4 Input Parameters for Risk Evaluation and Estimating Risk 6.4.1 Representative Concentrations for Each Receptor, Route of Exposure, and Exposure Unit As recommended by ITRC (2012), the highest concentration of the replicate sample is used as the representative EPC for the Site (see Table 6.4.2 Justification of Models and Equations The default values in the REM (IDEQ, 2004) were used during risk calculations. 6.4.3 Comparison of Calculated Risk with Target Risk Criteria for Each Exposure Unit Two general types of health effects are evaluated: cancer effects and adverse non-cancer health effects. This distinction is made because it is generally assumed that a dose threshold exists for non-carcinogens, and that compensatory processes prevent the expression of adverse effects if humans are exposed to chemical doses below the threshold. No such threshold is assumed for carcinogens. Instead, it is generally assumed that there is a finite probability of developing ---PAGE BREAK--- Soil Stockpile Sampling at the Dumas Seed Site Page 6 of 9 cancer associated with any exposure to a carcinogen. As a result, carcinogens and non- carcinogens have separate toxicity criteria. Risk evaluation involves estimating the magnitude of the potential adverse health effects of the Site COC, and identifying the COC and routes of exposure that contribute the most risk to the defined receptor population. It combines the toxicity information and exposure assessment. IDEQ uses a target site cancer risk of 10-5 (unitless) or a non-cancer hazard quotient (HQ) / hazard index (HI) of 1 (unitless) to determine acceptable risk. 6.4.3.1 Carcinogenic Effects The potential for carcinogenic effects is evaluated by estimating the probability of developing cancer over a lifetime based on exposure assumptions and chemical-specific toxicity criteria. The risks resulting from exposure to multiple carcinogens are also assumed to be additive. In accordance with the Idaho REM (IDEQ, 2004), a target Site risk of 10-5 was used to determine acceptable cancer risk at the Site. This target risk level was selected because it is protective based on the overall conservative nature of exposure scenarios used in the REM process and the underlying health criteria. Total cancer risks for all but the residential receptor-age adjusted were below the acceptable cancer risk of 1x10-5 (Appendix Estimated risk for the residential receptor-age adjusted was 1.34x10-6. Estimated risk for the residential receptor-child was 8.98x10-6. Estimated risk for the non-residential receptor was 4.70x10-7 and estimated risk for the construction worker receptor was 5.82x10-8. 6.4.3.2 Non-cancer Health Effects The reference dose is a level of intake below which the USEPA believes it is unlikely that sensitive individuals will experience adverse health effects during a lifetime. If the HQ exceeds 1, there may be cause for concern regarding non-cancer effects (USEPA, 1989; IDEQ, 2004). Risk assessment guidelines consider the additive effects associated with simultaneous exposure to several chemicals by specifying that all HQs be summed across exposure routes and chemicals to estimate the total HI (USEPA, 1989; IDEQ, 2004). HIs for the residential, non-residential, and construction worker receptors were below the acceptable non-cancer risk of 1 (Appendix Estimated non-cancer risk for the residential receptor-child was 0.131 and the estimated non-cancer risk for the residential receptor-age adjusted was 0.0391. Additionally, estimated non-cancer risk for the non-residential receptor was 0.00623 and estimated non-cancer risk for the construction worker receptor was 0.00509. 6.5 Uncertainty Summary Uncertainties reflect limitations in knowledge or data. In this RE, most of the uncertainties relate to the measurement of media contaminant levels and calculation of concentrations to which people may be exposed, and the selection of exposure factors and toxicity assumptions. This section qualitatively evaluates the potential sources of uncertainty with regard to the degree of uncertainty, and whether it more likely over- or under-estimates risk. Uncertainty in a risk assessment that produces the potential for two kinds of possible errors. A Type I error is the identification of a specific chemical, area, or activity as a health concern ---PAGE BREAK--- Soil Stockpile Sampling at the Dumas Seed Site Page 7 of 9 when, in fact, it is not a concern (false positive conclusion). A Type II error is the elimination of a chemical, area, or activity from further consideration when, in fact, there should be a concern (false negative conclusion). In general, USEPA and IDEQ risk-assessment procedures are conservative in order to protect human health, and they are more likely to indicate that chemicals exceed target risk goals when health risks may actually be insignificant (Type I error), rather than indicating that chemicals are not a health risk. This approach reduces false-negative conclusions about health risk. This RE is consistent with that guidance, which results in conservative estimates that likely overestimate risk. 6.5.1 Available Data and Exposure Point Concentrations Uncertainty in the development of EPCs is caused by measurement error, temporal and spatial variability, and assumptions made due to limited sampling data and the inability to sample every area in an entire site. A limited number of samples were obtained from the soil stockpiles to represent the most contaminated portions of the Site soil. This type of biased sampling approach likely increases an EPC and likely overestimates risk, considering samples were collected from areas easily observed to have been impacted from Site historical use. Therefore, it likely represents worst case exposures. Measurement errors and random and/or systematic errors arise from the inability to measure variables precisely and accurately field equipment and laboratory protocols), or because the quantity being measured varies spatially or temporally. Basic methodological (laboratory processing and equipment) errors were limited for the data set in this RE, given the reliance on standardized protocols and other quality assurance / quality control (QA/QC)-dictated criteria. The principal uncertainties with the data used in this RE lie more with temporal and spatial variability in concentrations and sampling. Temporal errors are of differing types and can include environmental data gathering at different times of day or year. Temporal errors also apply to the extent of any differences arising beyond the present day, in the absence of remedial measures, such as future land-use changes or future exposure receptor demographic and socioeconomic characteristics. 6.5.2 Toxicity Criteria and Exposure Factors Reference doses and cancer potency factors are quantitative toxicity criteria with inherent uncertainty that are used to assess non-carcinogenic health effects and carcinogenic risk. A chronic reference dose is an estimate of a lifetime (70 years) daily chemical dose that is likely to result in no appreciable deleterious non-carcinogenic effects. To derive a reference dose, a series of professional judgments are made to assess the quality and relevance of human or animal data and to identify the critical study and the most critical toxic effect. These criteria are generally developed by USEPA risk-assessment work groups and listed in USEPA risk-assessment guidance documents and databases. For each factor representing a specific area of uncertainty inherent in the extrapolation from the available data, an uncertainty factor is applied. Uncertainty factors generally consist of multiples of 10, although values less than 10 are sometimes used. Data typically used in developing the reference doses are the highest “no- observable-adverse-effect” levels for the critical studies and effects of the non-carcinogen, which means that the reference dose may overestimate risk. ---PAGE BREAK--- Soil Stockpile Sampling at the Dumas Seed Site Page 8 of 9 Cancer potency factors are chemical-specific values used to calculate the risk of cancer resulting from exposure to carcinogenic chemicals. A higher value implies a more potent carcinogen. USEPA develops potency factors from animal studies or, where possible, from epidemiological data. Because animal studies use much higher doses over shorter periods of time than the exposures generally expected for humans, the dose-response relationship from the dose range used in animal studies is extrapolated to the low dose range generally experienced by humans, typically using a “linearized multistage” mathematical model. To ensure protectiveness, potency factors are typically derived from the 95 percent UCL of the slope. Thus, actual risks are unlikely to be higher than those predicted and may be considerably lower. The potential toxicity-modifying interactions between COCs at the Site are numerous and complex. Some of these interactions could be expected to increase toxic effects, while some could reduce toxic effects. As a result, it is difficult to determine whether risks are over- or under-estimated due to toxicity criteria. The default exposure factors are based on available literature and recommended values from USEPA. These values, such as exposure frequencies, daily soil and water ingestion rates, and time spent indoors and outdoors, are typically based on averages, medians, or upper percentiles of available data. Exposure factors are intended to represent typical (or average) exposures or might be conservative in order to be health protective of sensitive subpopulations. Due to estimates and assumptions made about future land use and activities on the Site, it is also difficult to determine whether risks are over- or under-estimated due to standard default exposure factors. 7 Conclusions Results from the stockpiled soils from DU-4 indicate dieldrin concentrations exceed the USEPA RSL and the acceptance criteria at the Asotin County Landfill. The subsequent risk evaluation conducted on the stockpile dieldrin concentrations indicates the concentrations exceed the acceptable risk for residential use, but are acceptable for non-residential and construction worker receptors. Based on the results of the stockpile sampling and risk evaluation, TerraGraphics provides the following potential options for the stockpiled soil from DU-4:  Dispose of the stockpiled soils at a licensed landfill facility able to accept the waste.  To prevent potential migration, secure and prevent access to impacted soils from public access until an appropriate remedial plan is designed and implemented. 8 References Agency for Toxic Substances and Disease Registry (ATSDR). 2002. Toxicological Profile for Aldrin/Dieldrin. U.S. Department of Health and Human Services, Public Health Service, September 2002. Available at http://www.atsdr.cdc.gov/toxprofiles/tp1.pdf. Accessed on July 7, 2016. Idaho Department of Environmental Quality (IDEQ), 2004. Risk Evaluation Manual, 1410 North Hilton, Boise, Idaho 83706. ---PAGE BREAK--- Soil Stockpile Sampling at the Dumas Seed Site Page 9 of 9 Interstate Technology & Regulatory Council (ITRC) Incremental Sampling Methodology Team, 2012. Incremental Sampling Methodology Technical and Regulatory Guidance. February. Tetra Tech, Inc. (Tetra Tech), 2012. Final Phase I Environmental Site Assessment, Old Dumas Seed Site, 103 North Almon, Moscow, Idaho. February 20. TerraGraphics Environmental Engineering, Inc. (TerraGraphics), 2007. Phase I Environmental Site Assessment Report, 109 North Almon Street, Moscow Idaho 83843. Prepared for David Ollivant, ST Moscow, LLC. June. TerraGraphics, 2016a. Data Summary Report for the 2015 Surface Soil Investigation at the Dumas Seed Facility in Moscow, Idaho. Prepared for City of Moscow. January 27. TerraGraphics, 2016b. Memorandum Regarding Soil Stockpiling at the Dumas Seed Facility for Bruce Johnson and John Morrow. May 24. Tetra Tech, 2013. Final Phase II Environmental Site Assessment, Old Dumas Seed Site 103 North Almon Street, Moscow, Idaho. Prepared for the City of Moscow, April 17. U.S. Environmental Protection Agency (USEPA), 1989. Risk Assessment Guidance for Superfund Volume I Human Health Evaluation Manual, USEPA/540/1-89/002; December. USEPA, 2016. Regional Screening Levels (RSLs) Summary Table. Dated May 2016. Washington State Department of Ecology (Ecology), 1994. Natural Background Soil Metals Concentrations in Washington State. Toxics Cleanup Program. October. ---PAGE BREAK--- Figure 1 ReHistoric - Dumas Seed Site Map and Decision Units 16040-03 July 12, 2016 ---PAGE BREAK--- Screening Levels Analyte 1 2 3 IDAPA USEPA Residential - for IDAPA exceedances USEPA Industrial - for IDAPA exceedances Skewness Max Concentration Standard Deviation Mean CV or RSD (Percent) t 95% UCL (student's-t distribution) RPD Dieldrin 0.279 0.207 0.207 0.00133a 0.034 0.14 1.73 0.279 0.0416 0.231 18.0 2.92 0.301 26.3 Arsenic 5.39 7.86 1.11 0.391a 0.68 3.0 -0.770 7.86 3.42 4.79 71.3 2.92 10.5 75.1 Barium 145 112 15.4 896a -1.28 145 67.4 90.8 74.2 2.92 204 76.9 Cadmium <0.545 <0.56 <0.56 1.35a NA NA NA NA NA 2.92 NA NA Chromium 29.2 30.3 10.5 2,130a -1.71 30.3 11.1 23.3 47.7 2.92 42.1 57.3 Lead 77.4 43.1 0.706 49.6a 400 800 -0.31 77.4 38.4 40.4 95.1 2.92 105 89.0 Mercuryb 0.0599 <0.056 <0.056 0.00509a 11 46 1.73 0.0599 0.00225 0.0573 3.93 2.92 0.0611 6.41 Selenium <0.545 <0.56 <0.56 2.03a NA NA NA NA NA 2.92 NA NA Silver <0.545 <0.56 <0.56 0.189a NA NA NA NA NA 2.92 NA NA pH 7.2 7.19 7.36 NA 1.7 7.4 0.095 7.3 1.3 2.92 7.4 2.2 Diesel <25 <25 <25 NA NA NA NA NA NA 2.92 NA NA Lube Oil 589 699 574 NA 1 64 699 68 3 621 11 0 2 92 736 17 0 Table 1. Excavation Piles Soil Sample Results and Summary Statistics Replicate Sample Concentrations Summary Statistics Lube Oil 589 699 574 NA 1.64 699 68.3 621 11.0 2.92 736 17.0 Gasoline <5 <5 <5 NA NA NA NA NA NA 2.92 NA NA Benzene <0.005 <0.005 <0.005 0.025c NA NA NA NA NA 2.92 NA NA <0.005 <0.005 <0.005 0.25c NA NA NA NA NA 2.92 NA NA m+p-Xylene <0.01 0.0062 J 0.0106 27c -2 0.0106 0.002 0.01 27 2.92 0.01 37 Naphthalene <0.005 <0.005 <0.005 0.12c NA NA NA NA NA 2.92 NA NA o-Xylene <0.005 <0.005 0.00658 27c 2 0.00658 0.001 0.01 17 2.92 0.01 24 Toluene 0.00755 0.0112 0.0437 6.6c 1.67 0.0437 0.0199 0.0208 95.6 2.92 0.0544 89.2 Notes: All concentrations are in milligrams per kilogram (mg/kg) Summary statistics use the practical quantitation limig (PQL) for the non-detect values when there is a mixure of detects and non-detects. CV = coefficient of variation (standard deviation/mean*100) RSD = relative standard deviation UCL = upper confidence limit (mean + I where: σ=standard deviation; r=count or 3 (http://www.itrcweb.org/ism-1/4_2_2_UCL_Calculation_Method.html) IDAPA = Idaho administrative code J = Result between the PQL and the method detection limit aIdaho initial target default level (IDTL) bLaboratory practical quantitation limit (PQL) exceeds the IDTL cIdaho petroleum risk evaluation manual screening level (Petro REM) Bold values indicate concentration exceeds the IDTL; italicized values indicate concentration exceeds the USEPA residential regional screening leve Bold values indicate concentration exceeds the IDTL; italicized values indicate concentration exceeds the USEPA residential regional screening leve NA = not applicable ---PAGE BREAK--- Soil Stockpiling at the Dumas Seed Facility A Attachment A Laboratory Report ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Batch 160609001 Project Summary Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] The samples listed on the following page(s) were received for analysis at Anatek Labs, Inc. The analytical report is attached. All test results reported below comply with and meet current TNI standards, other applicable regulatory standards, and the Anatek Labs, Inc. Quality Assurance Manual, unless otherwise noted in the report. The results in this report relate only to the samples analyzed. All soil and solid results are reported on a dry-weight basis unless otherwise noted. An estimation of uncertainty is available upon request. This report shall not be reproduced, except in full, without the written consent of Anatek Labs, Inc. For questions about this report, please contact Justin Doty at [PHONE REDACTED]. Authorized Signature John Coddington, Lab Manager Page 1 of 2 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 1 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Batch 160609001 Project Summary Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] Anatek Sample ID Client Sample ID Matrix Collection Date/Time Received Date/Time Sample Summary 160609001-001 (DS-CS-A)060816 Soil 6/8/2016 5:35:00 PM 6/9/2016 7:34:00 AM 160609001-002 (DS-CS-B)060816 Soil 6/8/2016 5:48:00 PM 6/9/2016 7:34:00 AM 160609001-003 (DS-CS-C)060816 Soil 6/8/2016 6:00:00 PM 6/9/2016 7:34:00 AM 160609001-004 (DS-CS-D)060816 Soil 6/8/2016 6:08:00 PM 6/9/2016 7:34:00 AM QA/QC Summary QC Parameter 1. Sample Holding Time Valid? 2. Instrument Tunes Valid? 3. Method Blank(s) Valid? 4. Internal Standard Response(s) Valid? 5. Initial Calibration Curve(s) Valid? 6. Continuing Calibration(s) Valid? 7. Surrogate Recoveries Valid? 8. QC Sample Recoveries Valid? Yes / No (if No, see Comments below) Yes Yes Yes Yes Yes Yes Yes Yes Comments: Page 2 of 2 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 2 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-001 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 5:35 PM Date/Time Received 6/9/2016 Sample Location Extraction Date (DS-CS-A)060816 6/13/2016 7:34 AM Comments mg/Kg SAT 6/16/2016 Dieldrin EPA 8081A 0.279 0.01 Percent SAT 6/10/2016 %moisture %moisture 11.4 Surrogate Data Surrogate Standard Percent Recovery Control Limits Sample Number 160609001-001 Method DCB 80.8 30-150 EPA 8081A Page 1 of 3 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 3 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-002 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 5:48 PM Date/Time Received 6/9/2016 Sample Location Extraction Date (DS-CS-B)060816 6/13/2016 7:34 AM Comments mg/Kg SAT 6/16/2016 Dieldrin EPA 8081A 0.207 0.01 Percent SAT 6/10/2016 %moisture %moisture 9.6 Surrogate Data Surrogate Standard Percent Recovery Control Limits Sample Number 160609001-002 Method DCB 79.6 30-150 EPA 8081A Page 2 of 3 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 4 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-003 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 6:00 PM Date/Time Received 6/9/2016 Sample Location Extraction Date (DS-CS-C)060816 6/13/2016 7:34 AM Comments mg/Kg SAT 6/16/2016 Dieldrin EPA 8081A 0.207 0.01 Percent SAT 6/10/2016 %moisture %moisture 9.1 Surrogate Data Surrogate Standard Percent Recovery Control Limits Sample Number 160609001-003 Method DCB 75.4 30-150 EPA 8081A Authorized Signature John Coddington, Lab Manager MCL EPA's Maximum Contaminant Level ND Not Detected PQL Practical Quantitation Limit This report shall not be reproduced except in full, without the written approval of the laboratory. The results reported relate only to the samples indicated. Soil/solid results are reported on a dry-weight basis unless otherwise noted. Page 3 of 3 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 5 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Quality Control Data Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] Parameter %Rec Lab Control Sample LCS Result LCS Spike AR %Rec Analysis Date Units Prep Date 6/13/2016 Dieldrin 0.04 86.8 0.0347 47-123 mg/Kg 6/13/2016 Parameter %Rec Matrix Spike Duplicate MSD Result MSD Spike Analysis Date Units %RPD AR %RPD Prep Date 6/13/2016 Dieldrin 0.04 257.5 0.310 mg/Kg 23.8 0-50 6/13/2016 Parameter %Rec Matrix Spike Sample Number MS Result MS Spike AR %Rec Analysis Date Units Sample Result Prep Date 160609001-003 6/13/2016 Dieldrin 0.04 92.5 0.244 33-136 mg/Kg 0.207 6/13/2016 Parameter Method Blank Result Analysis Date Units PQL Prep Date 6/13/2016 Dieldrin ND mg/Kg 0.01 6/13/2016 AR Acceptable Range ND Not Detected PQL Practical Quantitation Limit RPD Relative Percentage Difference Page 1 of 1 Thursday, June 23, 2016 Comments: Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 6 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Batch 160609001 Analytical Results Report Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-001 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 5:35 PM Date/Time Received 6/9/2016 Sample Location (DS-CS-A)060816 7:34 AM Comments mg/Kg HSW 6/16/2016 Arsenic EPA 6020A 5.39 0.545 mg/Kg HSW 6/16/2016 Barium EPA 6020A 145 0.545 mg/Kg HSW 6/16/2016 Cadmium EPA 6020A ND 0.545 mg/Kg HSW 6/16/2016 Chromium EPA 6020A 29.2 0.545 mg/Kg HSW 6/16/2016 Lead EPA 6020A 77.4 0.545 mg/Kg HSW 6/16/2016 Mercury-ICPMS EPA 6020A 0.0599 0.0545 mg/Kg HSW 6/16/2016 Selenium EPA 6020A ND 0.545 mg/Kg HSW 6/16/2016 Silver EPA 6020A ND 0.545 160609001-002 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 5:48 PM Date/Time Received 6/9/2016 Sample Location (DS-CS-B)060816 7:34 AM Comments mg/Kg HSW 6/16/2016 Arsenic EPA 6020A 7.86 0.56 mg/Kg HSW 6/16/2016 Barium EPA 6020A 112 0.56 mg/Kg HSW 6/16/2016 Cadmium EPA 6020A ND 0.56 mg/Kg HSW 6/16/2016 Chromium EPA 6020A 30.3 0.56 mg/Kg HSW 6/16/2016 Lead EPA 6020A 43.1 0.56 mg/Kg HSW 6/16/2016 Mercury-ICPMS EPA 6020A ND 0.056 mg/Kg HSW 6/16/2016 Selenium EPA 6020A ND 0.56 mg/Kg HSW 6/16/2016 Silver EPA 6020A ND 0.56 Page 1 of 2 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 7 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Batch 160609001 Analytical Results Report Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-003 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 6:00 PM Date/Time Received 6/9/2016 Sample Location (DS-CS-C)060816 7:34 AM Comments mg/Kg HSW 6/16/2016 Arsenic EPA 6020A 1.11 0.56 mg/Kg HSW 6/16/2016 Barium EPA 6020A 15.4 0.56 mg/Kg HSW 6/16/2016 Cadmium EPA 6020A ND 0.56 mg/Kg HSW 6/16/2016 Chromium EPA 6020A 10.5 0.56 mg/Kg HSW 6/16/2016 Lead EPA 6020A 0.706 0.56 mg/Kg HSW 6/16/2016 Mercury-ICPMS EPA 6020A ND 0.056 mg/Kg HSW 6/16/2016 Selenium EPA 6020A ND 0.56 mg/Kg HSW 6/16/2016 Silver EPA 6020A ND 0.56 Authorized Signature John Coddington, Lab Manager MCL EPA's Maximum Contaminant Level ND Not Detected PQL Practical Quantitation Limit This report shall not be reproduced except in full, without the written approval of the laboratory. The results reported relate only to the samples indicated. Soil/solid results are reported on a dry-weight basis unless otherwise noted. Page 2 of 2 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 8 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Quality Control Data Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] Parameter %Rec Lab Control Sample LCS Result LCS Spike AR %Rec Analysis Date Units Prep Date 6/16/2016 Silver 0.5 102.4 0.512 80-120 mg/kg 6/15/2016 6/16/2016 Selenium 2 110.5 2.21 80-120 mg/kg 6/15/2016 6/16/2016 MERCURY-ICPMS 0.025 107.2 0.0268 80-120 mg/kg 6/15/2016 6/16/2016 Lead 2 108.5 2.17 80-120 mg/kg 6/15/2016 6/16/2016 Chromium 2 108.0 2.16 80-120 mg/kg 6/15/2016 6/16/2016 Cadmium 2 103.5 2.07 80-120 mg/kg 6/15/2016 6/16/2016 Barium 2 109.0 2.18 80-120 mg/kg 6/15/2016 6/16/2016 Arsenic 2 108.0 2.16 80-120 mg/kg 6/15/2016 Parameter %Rec Matrix Spike Duplicate MSD Result MSD Spike Analysis Date Units %RPD AR %RPD Prep Date 6/16/2016 Silver 5.55 101.4 5.63 mg/kg 2.1 0-20 6/15/2016 6/16/2016 Selenium 22.2 101.4 22.5 mg/kg 1.3 0-20 6/15/2016 6/16/2016 MERCURY-ICPMS 0.278 97.9 0.332 mg/kg 3.8 0-20 6/15/2016 6/16/2016 Lead 27.3 112.1 108 mg/kg 0.0 0-20 6/15/2016 6/16/2016 Chromium 22.2 106.3 52.8 mg/kg 7.3 0-20 6/15/2016 6/16/2016 Cadmium 22.2 105.9 23.5 mg/kg 0.8 0-20 6/15/2016 6/16/2016 Barium 22.2 94.6 166 mg/kg 4.1 0-20 6/15/2016 6/16/2016 Arsenic 22.2 106.8 29.1 mg/kg 1.0 0-20 6/15/2016 Parameter %Rec Matrix Spike Sample Number MS Result MS Spike AR %Rec Analysis Date Units Sample Result Prep Date 160609001-001 6/16/2016 Silver 5.6 102.7 5.75 75-125 mg/kg ND 6/15/2016 160609001-001 6/16/2016 Selenium 22.4 101.8 22.8 75-125 mg/kg ND 6/15/2016 160609001-001 6/16/2016 MERCURY-ICPMS 0.28 101.8 0.345 75-125 mg/kg 0.0599 6/15/2016 160609001-001 6/16/2016 Lead 27.3 112.1 108 75-125 mg/kg 77.4 6/15/2016 160609001-001 6/16/2016 Chromium 22.4 88.8 49.1 75-125 mg/kg 29.2 6/15/2016 160609001-001 6/16/2016 Cadmium 22.4 105.8 23.7 75-125 mg/kg ND 6/15/2016 160609001-001 6/16/2016 Barium 22.4 125.0 173 75-125 mg/kg 145 6/15/2016 160609001-001 6/16/2016 Arsenic 22.4 107.2 29.4 75-125 mg/kg 5.39 6/15/2016 Page 1 of 2 Thursday, June 23, 2016 Comments: Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 9 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Quality Control Data Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] Parameter Method Blank Result Analysis Date Units PQL Prep Date 6/16/2016 Arsenic ND mg/Kg 0.5 6/15/2016 6/16/2016 Barium ND mg/Kg 0.5 6/15/2016 6/16/2016 Cadmium ND mg/Kg 0.5 6/15/2016 6/16/2016 Chromium ND mg/Kg 0.5 6/15/2016 6/16/2016 Lead ND mg/Kg 0.5 6/15/2016 6/16/2016 Mercury-ICPMS ND mg/Kg 0.05 6/15/2016 6/16/2016 Selenium ND mg/Kg 0.5 6/15/2016 6/16/2016 Silver ND mg/Kg 0.5 6/15/2016 AR Acceptable Range ND Not Detected PQL Practical Quantitation Limit RPD Relative Percentage Difference Page 2 of 2 Thursday, June 23, 2016 Comments: Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 10 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Batch 160609001 Analytical Results Report Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-001 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 5:35 PM Date/Time Received 6/9/2016 Sample Location (DS-CS-A)060816 7:34 AM Comments ph Units KMC 6/10/2016 pH EPA 9045 7.20 160609001-002 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 5:48 PM Date/Time Received 6/9/2016 Sample Location (DS-CS-B)060816 7:34 AM Comments ph Units KMC 6/10/2016 pH EPA 9045 7.19 160609001-003 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 6:00 PM Date/Time Received 6/9/2016 Sample Location (DS-CS-C)060816 7:34 AM Comments ph Units KMC 6/10/2016 pH EPA 9045 7.36 Authorized Signature John Coddington, Lab Manager MCL EPA's Maximum Contaminant Level ND Not Detected PQL Practical Quantitation Limit This report shall not be reproduced except in full, without the written approval of the laboratory. The results reported relate only to the samples indicated. Soil/solid results are reported on a dry-weight basis unless otherwise noted. Page 1 of 1 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 11 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-001 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 5:35 PM Date/Time Received 6/9/2016 Sample Location Extraction Date (DS-CS-A)060816 6/10/2016 7:34 AM Comments mg/kg TGT 6/13/2016 Diesel EPA 8015D ND 25 mg/kg TGT 6/13/2016 Lube Oil EPA 8015D 589 100 mg/kg SAT 6/9/2016 Gasoline EPA 8015D ND 5 Surrogate Data Surrogate Standard Percent Recovery Control Limits Sample Number 160609001-001 Method 4-Bromofluorobenzene 99.2 50-150 EPA 8015D Hexacosane 91.2 50-150 EPA 8015D Page 1 of 3 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 12 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-002 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 5:48 PM Date/Time Received 6/9/2016 Sample Location Extraction Date (DS-CS-B)060816 6/10/2016 7:34 AM Comments mg/kg TGT 6/13/2016 Diesel EPA 8015D ND 25 mg/kg TGT 6/13/2016 Lube Oil EPA 8015D 699 100 mg/kg SAT 6/9/2016 Gasoline EPA 8015D ND 5 Surrogate Data Surrogate Standard Percent Recovery Control Limits Sample Number 160609001-002 Method 4-Bromofluorobenzene 98.4 50-150 EPA 8015D Hexacosane 91.2 50-150 EPA 8015D Page 2 of 3 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 13 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-003 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 6:00 PM Date/Time Received 6/9/2016 Sample Location Extraction Date (DS-CS-C)060816 6/10/2016 7:34 AM Comments mg/kg TGT 6/13/2016 Diesel EPA 8015D ND 25 mg/kg TGT 6/13/2016 Lube Oil EPA 8015D 574 100 mg/kg SAT 6/9/2016 Gasoline EPA 8015D ND 5 Surrogate Data Surrogate Standard Percent Recovery Control Limits Sample Number 160609001-003 Method 4-Bromofluorobenzene 98.4 50-150 EPA 8015D Hexacosane 91.8 50-150 EPA 8015D Authorized Signature John Coddington, Lab Manager MCL EPA's Maximum Contaminant Level ND Not Detected PQL Practical Quantitation Limit This report shall not be reproduced except in full, without the written approval of the laboratory. The results reported relate only to the samples indicated. Soil/solid results are reported on a dry-weight basis unless otherwise noted. Page 3 of 3 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 14 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Quality Control Data Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] Parameter %Rec Lab Control Sample LCS Result LCS Spike AR %Rec Analysis Date Units Prep Date 6/9/2016 Gasoline 1 106.0 1.06 50-150 mg/kg 6/9/2016 6/10/2016 Diesel 100 81.8 81.8 50-150 mg/kg 6/10/2016 Parameter %Rec Lab Control Sample Duplicate LCSD Result LCSD Spike Analysis Date Units %RPD AR %RPD Prep Date 6/9/2016 Gasoline 1 97.0 0.97 mg/kg 8.9 0-25 6/9/2016 Parameter %Rec Matrix Spike Duplicate MSD Result MSD Spike Analysis Date Units %RPD AR %RPD Prep Date 6/10/2016 Diesel 100 72.7 72.7 mg/kg 2.6 0-25 6/10/2016 Parameter %Rec Matrix Spike Sample Number MS Result MS Spike AR %Rec Analysis Date Units Sample Result Prep Date 160606005-001A 6/10/2016 Diesel 100 70.8 70.8 50-150 mg/kg ND 6/10/2016 Parameter Method Blank Result Analysis Date Units PQL Prep Date 6/10/2016 Diesel ND mg/kg 25 6/10/2016 6/9/2016 Gasoline ND mg/kg 5 6/9/2016 6/10/2016 Lube Oil ND mg/kg 100 6/10/2016 AR Acceptable Range ND Not Detected PQL Practical Quantitation Limit RPD Relative Percentage Difference Page 1 of 1 Thursday, June 23, 2016 Comments: Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 15 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-001 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 5:35 PM Date/Time Received 6/9/2016 Sample Location Extraction Date (DS-CS-A)060816 7:34 AM Comments mg/kg SAT 6/9/2016 Benzene EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 m+p-Xylene EPA 8260C ND 0.01 mg/kg SAT 6/9/2016 Naphthalene EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 o-Xylene EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 Toluene EPA 8260C 0.00755 0.005 Percent SAT 6/10/2016 %moisture %moisture 11.4 Surrogate Data Surrogate Standard Percent Recovery Control Limits Sample Number 160609001-001 Method 1,2-Dichlorobenzene-d4 101.6 70-130 EPA 8260C 4-Bromofluorobenzene 98.8 70-130 EPA 8260C Toluene-d8 98.4 70-130 EPA 8260C Page 1 of 4 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 16 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-002 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 5:48 PM Date/Time Received 6/9/2016 Sample Location Extraction Date (DS-CS-B)060816 7:34 AM Comments mg/kg SAT 6/9/2016 Benzene EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 m+p-Xylene EPA 8260C 0.00620 0.01 mg/kg SAT 6/9/2016 Naphthalene EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 o-Xylene EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 Toluene EPA 8260C 0.0112 0.005 Percent SAT 6/10/2016 %moisture %moisture 9.6 Surrogate Data Surrogate Standard Percent Recovery Control Limits Sample Number 160609001-002 Method 1,2-Dichlorobenzene-d4 99.6 70-130 EPA 8260C 4-Bromofluorobenzene 98.8 70-130 EPA 8260C Toluene-d8 98.4 70-130 EPA 8260C Page 2 of 4 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 17 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-003 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 6:00 PM Date/Time Received 6/9/2016 Sample Location Extraction Date (DS-CS-C)060816 7:34 AM Comments mg/kg SAT 6/9/2016 Benzene EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 m+p-Xylene EPA 8260C 0.0106 0.01 mg/kg SAT 6/9/2016 Naphthalene EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 o-Xylene EPA 8260C 0.00658 0.005 mg/kg SAT 6/9/2016 Toluene EPA 8260C 0.0437 0.005 Percent SAT 6/10/2016 %moisture %moisture 9.1 Surrogate Data Surrogate Standard Percent Recovery Control Limits Sample Number 160609001-003 Method 1,2-Dichlorobenzene-d4 101.2 70-130 EPA 8260C 4-Bromofluorobenzene 98.8 70-130 EPA 8260C Toluene-d8 99.2 70-130 EPA 8260C Page 3 of 4 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 18 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] 160609001-004 Sample Number Matrix Soil Parameter Result Units Analysis Date Analyst Method Qualifier PQL Client Sample ID Sampling Date 6/8/2016 Sampling Time 6:08 PM Date/Time Received 6/9/2016 Sample Location Extraction Date (DS-CS-D)060816 7:34 AM Comments: As received weight basis - no soil jar provided mg/kg SAT 6/9/2016 Benzene EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 m+p-Xylene EPA 8260C 0.0131 0.01 mg/kg SAT 6/9/2016 Naphthalene EPA 8260C ND 0.005 mg/kg SAT 6/9/2016 o-Xylene EPA 8260C 0.00658 0.005 mg/kg SAT 6/9/2016 Toluene EPA 8260C 0.0481 0.005 Surrogate Data Surrogate Standard Percent Recovery Control Limits Sample Number 160609001-004 Method 1,2-Dichlorobenzene-d4 102.4 70-130 EPA 8260C 4-Bromofluorobenzene 97.6 70-130 EPA 8260C Toluene-d8 98.4 70-130 EPA 8260C Authorized Signature John Coddington, Lab Manager MCL EPA's Maximum Contaminant Level ND Not Detected PQL Practical Quantitation Limit This report shall not be reproduced except in full, without the written approval of the laboratory. The results reported relate only to the samples indicated. Soil/solid results are reported on a dry-weight basis unless otherwise noted. Page 4 of 4 Thursday, June 23, 2016 Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 19 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Quality Control Data Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] Parameter %Rec Lab Control Sample LCS Result LCS Spike AR %Rec Analysis Date Units Prep Date 6/9/2016 Toluene 0.01 106.0 0.0106 80-120 mg/kg 6/9/2016 6/9/2016 o-Xylene 0.01 110.0 0.011 80-120 mg/kg 6/9/2016 6/9/2016 Naphthalene 0.01 95.0 0.0095 80-120 mg/kg 6/9/2016 6/9/2016 0.01 109.0 0.0109 80-120 mg/kg 6/9/2016 6/9/2016 Benzene 0.01 106.0 0.0106 80-120 mg/kg 6/9/2016 Parameter %Rec Matrix Spike Duplicate MSD Result MSD Spike Analysis Date Units %RPD AR %RPD Prep Date 6/9/2016 Toluene 0.28 95.7 0.268 mg/kg 5.1 0-25 6/9/2016 6/9/2016 o-Xylene 0.28 102.5 0.287 mg/kg 4.8 0-25 6/9/2016 6/9/2016 Naphthalene 0.28 76.1 0.213 mg/kg 12.7 0-25 6/9/2016 6/9/2016 0.28 98.6 0.276 mg/kg 5.6 0-25 6/9/2016 6/9/2016 Benzene 0.28 96.4 0.270 mg/kg 5.1 0-25 6/9/2016 Parameter %Rec Matrix Spike Sample Number MS Result MS Spike AR %Rec Analysis Date Units Sample Result Prep Date 160607044-001A 6/9/2016 Toluene 0.28 100.7 0.282 59-122 mg/kg ND 6/9/2016 160607044-001A 6/9/2016 o-Xylene 0.28 107.5 0.301 75-120 mg/kg ND 6/9/2016 160607044-001A 6/9/2016 Naphthalene 0.28 86.4 0.242 65-125 mg/kg ND 6/9/2016 160607044-001A 6/9/2016 0.28 104.3 0.292 73-120 mg/kg ND 6/9/2016 160607044-001A 6/9/2016 Benzene 0.28 101.4 0.284 71-120 mg/kg ND 6/9/2016 Page 1 of 2 Thursday, June 23, 2016 Comments: Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 20 of 25 ---PAGE BREAK--- Client: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING Attn: JOHN MEANS Address: 121 S. JACKSON MOSCOW, ID 83843 Analytical Results Report Batch 160609001 Project Name: REHISTORIC - DUMAS SEED 16040-01 Quality Control Data Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] Parameter Method Blank Result Analysis Date Units PQL Prep Date 6/9/2016 Benzene ND mg/kg 0.005 6/9/2016 6/9/2016 ND mg/kg 0.005 6/9/2016 6/9/2016 m+p-Xylene ND mg/kg 0.01 6/9/2016 6/9/2016 Naphthalene ND mg/kg 0.005 6/9/2016 6/9/2016 o-Xylene ND mg/kg 0.005 6/9/2016 6/9/2016 Toluene ND mg/kg 0.005 6/9/2016 AR Acceptable Range ND Not Detected PQL Practical Quantitation Limit RPD Relative Percentage Difference Page 2 of 2 Thursday, June 23, 2016 Comments: Certifications held by Anatek Labs ID: EPA:ID00013; AZ:0701; FL(NELAP):E87893; ID:ID00013; MT:CERT0028; NM: ID00013;NV:ID00013; OR:ID200001-002; WA:C595 Certifications held by Anatek Labs WA: EPA:WA00169; ID:WA00169; WA:C585; MT:Cert0095; FL(NELAP): E871099 Page 21 of 25 ---PAGE BREAK--- Login Report Anatek Labs, Inc. 1282 Alturas Drive • Moscow, ID 83843 • (208) 883-2839 • Fax (208) 882-9246 • email [EMAIL REDACTED] 504 E Sprague Ste. D • Spokane WA 99202 • (509) 838-3999 • Fax (509) 838-4433 • email [EMAIL REDACTED] Order ID: 160609001 Customer Name: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING 121 S. JACKSON Contact Name: JOHN MEANS Comment: Order Date: 6/9/2016 Project Name: REHISTORIC - DUMAS SEED 16040-01 MOSCOW ID 83843 Sample 160609001-001 Date Collected: 6/8/2016 Date Received: 6/9/2016 7:34:00 AM Customer Sample (DS-CS-A)060816 Comment: Collector: TOM JENKINS Matrix: Soil Quantity: 3 Recv'd: Test Method Due Date Priority Lab Time Collected: 5:35 PM %Moisture 6/21/2016 %moisture Normal (~10 Days) M OC PEST 8081A 6/21/2016 EPA 8081A Normal (~10 Days) M pH 1:5 6/21/2016 EPA 9045 Normal (~10 Days) M MOSC 6/21/2016 EPA 8015D Normal (~10 Days) M TPHG MOSC 6/21/2016 EPA 8015D Normal (~10 Days) M VOC 8260 IDTL 6/21/2016 EPA 8260C Normal (~10 Days) M Arsenic 6/21/2016 EPA 6020A Normal (~10 Days) M Barium 6/21/2016 EPA 6020A Normal (~10 Days) M Cadmium 6/21/2016 EPA 6020A Normal (~10 Days) M Chromium 6/21/2016 EPA 6020A Normal (~10 Days) M Lead 6/21/2016 EPA 6020A Normal (~10 Days) M Mercury-ICPMS 6/21/2016 EPA 6020A Normal (~10 Days) M Selenium 6/21/2016 EPA 6020A Normal (~10 Days) M Silver 6/21/2016 EPA 6020A Normal (~10 Days) M TOTAL 8 6/21/2016 N/A Normal (~10 Days) M Sample 160609001-002 Date Collected: 6/8/2016 Date Received: 6/9/2016 7:34:00 AM Customer Sample (DS-CS-B)060816 Comment: Collector: TOM JENKINS Matrix: Soil Quantity: 3 Recv'd: Test Method Due Date Priority Lab Time Collected: 5:48 PM %Moisture 6/21/2016 %moisture Normal (~10 Days) M Page 22 of 25 ---PAGE BREAK--- Order ID: 160609001 Customer Name: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING 121 S. JACKSON Contact Name: JOHN MEANS Comment: Order Date: 6/9/2016 Project Name: REHISTORIC - DUMAS SEED 16040-01 MOSCOW ID 83843 OC PEST 8081A 6/21/2016 EPA 8081A Normal (~10 Days) M pH 1:5 6/21/2016 EPA 9045 Normal (~10 Days) M MOSC 6/21/2016 EPA 8015D Normal (~10 Days) M TPHG MOSC 6/21/2016 EPA 8015D Normal (~10 Days) M VOC 8260 IDTL 6/21/2016 EPA 8260C Normal (~10 Days) M Arsenic 6/21/2016 EPA 6020A Normal (~10 Days) M Barium 6/21/2016 EPA 6020A Normal (~10 Days) M Cadmium 6/21/2016 EPA 6020A Normal (~10 Days) M Chromium 6/21/2016 EPA 6020A Normal (~10 Days) M Lead 6/21/2016 EPA 6020A Normal (~10 Days) M Mercury-ICPMS 6/21/2016 EPA 6020A Normal (~10 Days) M Selenium 6/21/2016 EPA 6020A Normal (~10 Days) M Silver 6/21/2016 EPA 6020A Normal (~10 Days) M TOTAL 8 6/21/2016 N/A Normal (~10 Days) M Sample 160609001-003 Date Collected: 6/8/2016 Date Received: 6/9/2016 7:34:00 AM Customer Sample (DS-CS-C)060816 Comment: Collector: TOM JENKINS Matrix: Soil Quantity: 3 Recv'd: Test Method Due Date Priority Lab Time Collected: 6:00 PM %Moisture 6/21/2016 %moisture Normal (~10 Days) M OC PEST 8081A 6/21/2016 EPA 8081A Normal (~10 Days) M pH 1:5 6/21/2016 EPA 9045 Normal (~10 Days) M MOSC 6/21/2016 EPA 8015D Normal (~10 Days) M TPHG MOSC 6/21/2016 EPA 8015D Normal (~10 Days) M VOC 8260 IDTL 6/21/2016 EPA 8260C Normal (~10 Days) M Arsenic 6/21/2016 EPA 6020A Normal (~10 Days) M Barium 6/21/2016 EPA 6020A Normal (~10 Days) M Cadmium 6/21/2016 EPA 6020A Normal (~10 Days) M Chromium 6/21/2016 EPA 6020A Normal (~10 Days) M Lead 6/21/2016 EPA 6020A Normal (~10 Days) M Mercury-ICPMS 6/21/2016 EPA 6020A Normal (~10 Days) M Selenium 6/21/2016 EPA 6020A Normal (~10 Days) M Silver 6/21/2016 EPA 6020A Normal (~10 Days) M TOTAL 8 6/21/2016 N/A Normal (~10 Days) M Page 23 of 25 ---PAGE BREAK--- Order ID: 160609001 Customer Name: TERRAGRAPHICS ENVIRONMENTAL ENGINEERING 121 S. JACKSON Contact Name: JOHN MEANS Comment: Order Date: 6/9/2016 Project Name: REHISTORIC - DUMAS SEED 16040-01 MOSCOW ID 83843 Sample 160609001-004 Date Collected: 6/8/2016 Date Received: 6/9/2016 7:34:00 AM Customer Sample (DS-CS-D)060816 Comment: Collector: TOM JENKINS Matrix: Soil Quantity: 1 Recv'd: Test Method Due Date Priority Lab Time Collected: 6:08 PM %Moisture 6/21/2016 %moisture Normal (~10 Days) M VOC 8260 IDTL 6/21/2016 EPA 8260C Normal (~10 Days) M SAMPLE CONDITION RECORD Samples received in a cooler? Yes Samples received intact? Yes What is the temperature of the sample(s)? 3.0 Samples received with a COC? Yes Samples received within holding time? Yes Are all sample bottles properly preserved? Yes Are VOC samples free of headspace? N/A Is there a trip blank to accompany VOC samples? N/A Labels and chain agree? Yes Page 24 of 25 ---PAGE BREAK--- \ UR q p€ p E 2t o o{ € @ 5 tJ€ 6€ p€ E X a6b.)\o \J o\ o UI 5 lr] q) @ { \o \C)p hJ 6 a \a \o !l x€ 6I55 o CDo Gt)o (o oo H Ha PI a9, N No ct) o70 - -m g T,A 6Z {;o7o 6Q ,B Ed ->r>s An a2 md mo:Q o) !o OE 5o?d 'g'ry'='S @ ,--tsFd t]<4 la. Fa sa s= -e 6 s*g 93 =d g a (n o3E.odo f I o f .C ^ C- o G, \ QA C- o0 C2 o0 oo s x C Ui Ut rar 00 o) o *l .tr. s LN t\tt q) D3g = @(fod =3 @ I or (^It- J C o o C (n or tAI r' $ r U'w pooo G Y b v v Ws \rr { v p # of Containers o N r c ! 2 a -C'It-- * -t,a ir- -coI cA F.l Sample Volume brELD4tn/ / / Rtx{ 6 / 1?t{"b, Gx / / / gI'd^l Pli 6- .s ] 6\ 34. :l $ oa'il LI s t It z. D3o Co Iir l-,tv -t s f_L L : I t : I i ,l,t I t tl Hw n ilt \ Np o. Fv{ ; \n Page 25 of 25 ---PAGE BREAK--- Soil Stockpiling at the Dumas Seed Facility A Attachment B REM Output ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 LIST OF SELECTED CHEMICALS Chemicals of Concern CAS Number Dieldrin 60-57-1 Notes: Page 1 of 18 Sheet name COC ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 PHYSICAL AND CHEMICAL PROPERTIES OF SELECTED CHEMICALS Molecular Water Henry's Law Org. Carbon Soil-Water Soil-Water Site-Specifc Diffusion Coefficient: CHEMICALS OF CONCERN Weight Solubility Constant Ads. Coef. Sorp. Coeff. Sorp. Coeff. in air in water (g/g-mol) (mg/L) (L-water/L-air) Koc (mL/g) Kd (mL-water /g-soil) Kd for Metals (mL/g) Kd for Metals (mL/g) (cm2/s) (cm2/s) Dieldrin 3.81E+02 1.95E-01 6.19E-04 2.14E+04 2.14E+01 NA 1.25E-02 4.74E-06 Notes: NA: Not applicable or available Page 2 of 18 Sheet name PCP ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 TOXICOLOGICAL PROPERTIES OF SELECTED CHEMICALS Carcinogenic Effects Non-Carcinogenic Effects Aquatic Life Criterion Human Health Risk from Consumption of: CHEMICALS OF CONCERN Oral Slope Factor (SFo) Inhalation Slope Factor (SFi) Oral Reference Dose (RfDo) Inhalation Reference Dose (RfDi) [mg/kg-day]-1 [mg/kg-day]-1 (mg/kg-day) (mg/kg-day) [mg/L] Dieldrin 16 16 0.00005 0.00005 1 0.1 NA 2.5 0.0019 0.00014 0.00014 Notes: NA: Not applicable or available Oral Relative Absorption Factor (RAFo) Dermal Relative Absorption Factor (RAFd) Maximum Contaminant Level (MCL) Page 3 of 18 Sheet name TOX ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RECEPTOR(S) AND ROUTE(S) OF EXPOSURE (Select by clicking the checkboxes) CHILD AGE-ADJUSTED Surficial Soil Ingestion of Soil, Outdoor Inhalation of Vapor Emissions and Particulates, and Dermal Contact with Soil Subsurface Soil Indoor Inhalation of Vapor Emissions Groundwater Indoor Inhalation of Vapor Emissions Soil-Vapor ( RE-2 only) Indoor Inhalation of Vapor Emissions Groundwater Protection Option 1. Option 2. Surface Water Protection If a surface water body is impacted or threatened, complete the following: If Ammonia is a potential COC for surface water, complete the following: SOURCE AND ROUTES OF EXPOSURES RECEPTOR Groundwater with Current Use or High Probability of Future Use as Drinking Water: The Maximum Contaminant Levels (MCLs) are used as the target concentrations at the POE. For chemicals without MCLs, risk-based ingestion standard for an age-adjusted adult is used. RESIDENT NON-RESIDENTIAL CONSTRUCTION WORKER Surface water supports warm water aquatic species? Surface water is used for drinking/water quality is appropriate for drinking water supplies? Surface water supports aquatic life? Surface water is used for recreational activities? Surface water supports cold water aquatic species? Groundwater with Low Probability of Future Use as Drinking Water: Groundwater concentrations protective of off-site receptors resulting from exposure via pathways other than direct ingestion. These pathways include but are not limited to volatilization to indoor air, irrigation water use with crop uptake and ingestion, and irrigation water use without crop uptake. Page 4 of 18 Sheet name ROE ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 EXPOSURE FACTORS (Page 1 of 2) Parameter Symbol Unit Default Value Value Used Comment ATc year 70 70 Default ATnc year =ED =ED Default Body Weight: Resident Child BWc kg 15 15 Default Resident Adolescent BWas kg 55 55 Default Resident Adult BWa kg 70 70 Default Non-residential BWcom kg 70 70 Default Construction Worker BWcon kg 70 70 Default Exposure Duration: Resident Child EDc year 6 6 Default Resident Adolescent EDas year 9 9 Default Resident Adult EDa year 15 15 Default Age-adjusted Resident EDaa year 30 30 Default Non-residential EDcom year 6.6 6.6 Default Construction Worker EDcon year 1 1 Default Exposure Frequency for Indirect Pathways: Resident Child EFc day/year 350 350 Default Resident Adolescent EFas day/year 350 350 Default Resident Adult EFa day/year 350 350 Default Non-residential EFcom day/year 250 250 Default Construction Worker EFcon day/year 30 30 Default Exposure Frequency for Direct Contact Pathways Resident Child EFdc day/year 270 270 Default Resident Adolescent EFdas day/year 270 270 Default Resident Adult EFda day/year 270 270 Default Non-residential EFdcom day/year 180 180 Default Construction Worker EFdcon day/year 30 30 Default Indoor Exposure Time: Resident Child ETi-c hrs/day 21 21 Default Resident Adolescent ETi-as hrs/day 15.8 15.8 Default Resident Adult ETi-a hrs/day 15 15 Default Non-residential ETi-com hrs/day 7.5 7.5 Default Outdoor Exposure Time: Resident Child ETo-c hrs/day 2 2 Default Resident Adolescent ETo-as hrs/day 2 2 Default Resident Adult ETo-a hrs/day 2 2 Default Non-residential ETo-com hrs/day 6 6 Default Construction Worker ETo-con hrs/day 10 10 Default Soil Ingestion Rate: Resident Child IRs-c mg/day 200 200 Default Resident Adolescent IRs-as mg/day 100 100 Default Resident Adult IRs-a mg/day 100 100 Default Age-adjusted IRs-aa mg/kg 31804 31804 Default Non-residential IRs-com mg/day 100 100 Default Construction Worker IRs-con mg/day 480 480 Default Groundwater Ingestion Rate: Resident Child IRw-c L/day 1.5 1.5 Default Resident Adolescent IRw-as L/day 1.7 1.7 Default Resident Adult IRw-a L/day 2 2 Default Age-adjusted IRw-aa L/kg 457.36 457.36 Default Non-residential IRw-com L/day 1 1 Default Hourly Indoor Inhalation Rate: Resident Child IRai-c m3/hr 0.7 0.7 Default Resident Adolescent IRai-as m3/hr 0.7 0.7 Default Resident Adult IRai-a m3/hr 0.7 0.7 Default Non-residential IRai-com m3/hr 1 1 Default Hourly Outdoor Inhalation Rate: Resident Child IRao-c m3/hr 1.1 1.1 Default Resident Adolescent IRao-as m3/hr 1.3 1.3 Default Resident Adult IRao-a m3/hr 1.3 1.3 Default Non-residential IRao-com m3/hr 1.6 1.6 Default Construction Worker IRao-con m3/hr 2.4 2.4 Default Indoor Inhalation Rate: Resident Child IRai-c m3/day 14.7 14.7 Default Resident Adolescent IRai-as m3/day 11.1 11.1 Default Resident Adult IRai-a m3/day 10.5 10.5 Default Age-adjusted (calculated) IRai-aa m3/kg 3478.9 3478.9 Default Commercial Worker IRai-com m3/day 7.5 7.5 Default Page 5 of 18 Sheet name EXP ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 EXPOSURE FACTORS (Page 2 of 2) Parameter Symbol Unit Default Value Value Used Comment Outdoor Inhalation Rate: Resident Child IRao-c m3/day 2.2 2.2 Default Resident Adolescent IRao-as m3/day 2.6 2.6 Default Resident Adult IRao-a m3/day 2.6 2.6 Default Age-adjusted IRao-aa m3/kg 502.9 502.9 Default Non-residential IRao-com m3/day 9.6 9.6 Default Construction Worker IRao-con m3/day 24 24 Default Skin Surface Area: Resident Child SAc cm2/day 2434 2434 Default Resident Adolescent SAas cm2/day 2434 2434 Default Resident Adult SAa cm2/day 5657 5657 Default Age-adjusted SAaa mg/kg 393322.9 393322.9 Default Non-residential SAcom cm2/day 3477 3477 Default Construction Worker SAcon cm2/day 3477 3477 Default Soil to Skin Adherence Factor: Resident Child Mc mg/cm2 1 1 Default Resident Adolescent Mas mg/cm1 0.3 0.3 Default Resident Adult Ma mg/cm2 0.3 0.3 Default Non-residential Mcom mg/cm2 0.1 0.1 Default Construction Worker Mcon mg/cm2 0.5 0.5 Default Averaging Time for Vapor Flux: Resident Child  s 1.89E+08 1.89E+08 Calculated Resident Adolescent  s 2.84E+08 2.84E+08 Calculated Resident Adult  s 4.73E+08 4.73E+08 Calculated Age-adjusted Resident  s 9.46E+08 9.46E+08 Calculated Commercial Worker  s 2.08E+08 2.08E+08 Calculated Construction Worker  s 3.15E+07 3.15E+07 Calculated Target Site Risk TR 1.00E-05 1.00E-05 Default Target Site Hazard Quotient THI 1 1 Default Page 6 of 18 Sheet name EXP ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 FATE AND TRANSPORT PARAMETERS (Page 1 of 3) Parameter Symbol Unit Default Value Value Used Comment SOIL PARAMETERS: Source-building separation LTS cm 30 30 Default Source-bottom-building separation LTS-B cm 183 183 Default Number of distinct soil strata between the top of the source zone and the building foundation nS - 1 1 Default SOIL-VAPOR PARAMETERS: Depth to sample from the bottom of the building LTSV cm 91 91 Default GROUNDWATER PARAMETERS: Groundwater-building separation LTGW cm 30 30 Default Number of distinct soil strata between the capillary fringe and the building foundation nGW - 1 1 Default AIR PARAMETERS: Viscosity of air  g/cm-s 1.80E-04 1.80E-04 Default ENCLOSED SPACE PARAMETERS: Area of the enclosed space below grade: Residential AB cm2 1561600 1561600 Default Non-residential AB cm2 4782069 4782069 Default Enclosed Space Foundation/Wall Thickness: Residential Lcrack cm 15 15 Default Non-residential Lcrack cm 15 15 Default Total area of cracks: Residential Acrack cm2 484 484 Default Non-residential Acrack cm2 861 861 Default Number of air exchanges per second: Residential ER 1/sec 2.78E-04 2.78E-04 Default Non-residential ER 1/sec 5.56E-04 5.56E-04 Default Length of enclosed space: Residential LB cm 1220 1220 Default Non-residential LB cm 2157 2157 Default Width of enclosed space: Residential WB cm 1220 1220 Default Non-residential WB cm 2157 2157 Default Height of enclosed space: Residential HB cm 244 244 Default Non-residential HB cm 244 244 Default Floor-wall seam perimeter: Residential Xcrack cm2/cm2 4880 4880 Default Non-residential Xcrack cm2/cm2 8628 8628 Default Crack depth below grade Zcrack cm 15 15 Default Equivalent crack radius rcrack cm 0.1 0.1 Default Pressure differential between enclosed space and soil surface beneath P g/cm-s2 40 40 Default Building ventilation rate: Residential Qbuilding cm3/s 1.01E+05 1.01E+05 Calculated Non-residential Qbuilding cm3/s 6.31E+05 6.31E+05 Calculated Volumetric flow rate of soil gas into the enclosed space: Residential Qsoil cm3/s 6.0E+00 6.0E+00 Calculated Non-residential Qsoil cm3/s 1.1E+01 1.1E+01 Calculated COWHERD PARTICULATE EMISSION MODEL: Inverse of mean concentration in the middle of a sqaure source Q/C [g/m2-s]/[kg/m3] 69.41 69.41 Calculated Fraction of Vegetative Cover V m2/m2 0.5 0.5 Default Mean Annual Wind Speed Um m/s 3.98 3.98 Default Equivalent Threshold Value of Windspeed at 7m Ut m/s 11.32 11.32 Default Windspeed Distribution Function from Cowherd et. al, 1985 F(x) 0.0495 0.0495 Default Inverse of mean concentration in the middle of a sqaure source Page 7 of 18 Sheet name F&T ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 FATE AND TRANSPORT PARAMETERS (Page 2 of 3) Parameter Symbol Unit Default Value Value Used Comment GROUNDWATER PROTECTION PARAMETERS: Groundwater Darcy Velocity Ugw cm/year 3340 3340 Default Groundwater Mixing Zone Length Lmz cm 1220 1220 Default Groundwater Mixing Zone Thickness gw cm 153 153 Default Groundwater Mixing Zone Width Wgw cm 1220 1220 Default Infiltration Rate  cm/year 25 25 Default Source Zone Soil Properties: Dry Soil Bulk Density of the source zone soil s g/cm3 1.64 1.64 Default Fractional Organic Carbon Content in the source zone soil foc g-C/g-soil 0.001 0.001 Default Total Soil Porosity of the source zone soil T cm3/cm3-soil 0.39 0.39 Default Volumetric Water Content in the source zone soil ws cm3/cm3 0.17 0.17 Default Volumetric Air Content in the source zone soil as cm3/cm3 0.22 0.22 Calculated Saturated Zone Soil Properties: Dry Soil Bulk Density of the saturated zone soil ss g/cm3 1.64 1.64 Default Fractional Organic Carbon Content in the saturated zone soil focs g-C/g-soil 0.001 0.001 Default Total Soil Porosity in the saturated zone soil Ts cm3/cm3-soil 0.39 0.39 Default Distance to the Point of Exposure (Xpoe) Xpoe,gw ft variable 0 User-Defined Longitudinal dispersivity x ft variable 0.000 Calculated Transverse dispersivity y ft variable 0.000 Calculated Vertical dispersivity z ft variable 0.000 Calculated Distance to the Point of Compliance (Xpoc) Xpoc,gw ft variable 0 User-Defined Longitudinal dispersivity x ft variable 0.000 Calculated Transverse dispersivity y ft variable 0.000 Calculated Vertical dispersivity z ft variable 0.000 Calculated SURFACE WATER PROTECTION PARAMETERS: pH of the receiving surface water pH 7 7 Default Temperature of the receiving surface water T 0C 15 15 Default Hardness of the receiving surface water H mg/L (as CaCO3) 25 25 Default Distance to the Point of Exposure (Xpoe) Xpoe,sw ft variable 0 User-Defined Longitudinal dispersivity x ft variable 0.000 Calculated Transverse dispersivity y ft variable 0.000 Calculated Vertical dispersivity z ft variable 0.000 Calculated Distance to the Point of Compliance (Xpoc) Xpoc,sw ft variable 0 User-Defined Longitudinal dispersivity x ft variable 0.000 Calculated Transverse dispersivity y ft variable 0.000 Calculated Vertical dispersivity z ft variable 0.000 Calculated Page 8 of 18 Sheet name F&T ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 FATE AND TRANSPORT PARAMETERS Parameter Symbol Unit Default Value Value Used Comment Thickness of Soil Strata Between the Source and the Bottom of the Building: Stratum A (Immediately below the building) hA cm 30 30 Default Stratum B hB cm 0 0 Default Stratum C hC cm 0 0 Default Total thickness (should equal the source-building separation) LTS cm 30 30 Thickness of Soil Strata Between Groundwater and the Bottom of the Building: Stratum A (Immediately below the building) hA cm 5 5 Default Stratum B hB cm 0 0 Default Stratum C hC cm 0 0 Default Stratum D (Capillary fringe) hcap cm 25 25 Calculated Total thickness (should equal the water table-building separation) LTGW cm 30 30 Stratum-Specific Properties: Stratum A (Immediately below the building): Vapor permeability kv cm2 5.00E-09 5.00E-09 Default Dry Soil Bulk Density sA g/cm3 1.64 1.64 Default Fractional Organic Carbon Content focA g-C/g-soil 0.001 0.001 Default Total Soil Porosity TA cm3/cm3-soil 0.39 0.39 Default Volumetric Water Content in Stratum A wsA cm3/cm3 0.17 0.17 Default Volumetric Air Content in Stratum A asA cm3/cm3 0.22 0.22 Calculated Stratum B: Dry Soil Bulk Density sB g/cm3 1.64 1.64 Default Fractional Organic Carbon Content focB g-C/g-soil 0.001 0.001 Default Total Soil Porosity TB cm3/cm3-soil 0.39 0.39 Default Volumetric Water Content in Stratum B wsB cm3/cm3 0.17 0.17 Default Volumetric Air Content in Stratum B asB cm3/cm3 0.22 0.22 Calculated Stratum C: Dry Soil Bulk Density sC g/cm3 1.64 1.64 Default Fractional Organic Carbon Content focC g-C/g-soil 0.001 0.001 Default Total Soil Porosity TC cm3/cm3-soil 0.39 0.39 Default Volumetric Water Content in Stratum C wsC cm3/cm3 0.17 0.17 Default Volumetric Air Content in Stratum C asC cm3/cm3 0.22 0.22 Calculated Stratum D (Capillary fringe): Mean particle diameter D cm 0.03 0.03 Default van Genuchten curve shape factor N - 1.449 1.449 Default Dry Soil Bulk Density sF g/cm3 1.64 1.64 Default Fractional Organic Carbon Content focF g-C/g-soil 0.001 0.001 Default Total Soil Porosity Tcap cm3/cm3-soil 0.39 0.39 Default Residual water content in capillary fringe soil rcap cm3/cm3 0.039 0.039 Default Volumetric Water Content in capillary fringe wcap cm3/cm3 0.322 0.322 Calculated Volumetric Air Content in capillary fringe acap cm3/cm3 0.068 0.068 Calculated (Page 3 of 3) Page 9 of 18 Sheet name F&T ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 REPRESENTATIVE CONCENTRATIONS FOR RESIDENTIAL RECEPTORS SURFICIAL SOIL SUB-SURFACE SOIL GROUNDWATER SOIL-VAPOR CHEMICALS OF CONCERN Inhalation of Vapors and Particulates, Dermal Contact, and Accidental Ingestion Indoor Inhalation of Vapor Emissions Indoor Inhalation of Vapor Emissions Indoor Inhalation of Vapor Emissions Dieldrin 2.79E-01 2.79E-01 Notes: GROUNDWATER AND/OR SURFACE WATER PROTECTION Representative Soil Concentration at the Source [mg/kg] Representative Groundwater Concentration at the Source [mg/L] Representative Groundwater Concentration at the POC [mg/L] NOT USED IN CALCULATIONS Representative Concentration [mg/kg] NOT REQUIRED- USING SOIL VAPOR Representative Concentration [mg/kg] USE OF SOIL-VAPOR DATA IS NOT ALLOWED UNDER RE-1 Page 10 of 18 Sheet name REPC-RES ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 REPRESENTATIVE CONCENTRATIONS FOR NON-RESIDENTIAL RECEPTORS SURFICIAL SOIL SUB-SURFACE SOIL GROUNDWATER SOIL-VAPOR CHEMICALS OF CONCERN Inhalation of Vapors and Particulates, Dermal Contact, and Accidental Ingestion Indoor Inhalation of Vapor Emissions Indoor Inhalation of Vapor Emissions Indoor Inhalation of Vapor Emissions Dieldrin 2.79E-01 2.79E-01 Note: Representative Concentration [mg/kg] NOT REQUIRED-USING SOIL VAPOR Representative Concentration [mg/kg] USE OF SOIL-VAPOR DATA IS NOT ALLOWED UNDER RE-1 Page 11 of 18 Sheet name REPC-NRES ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 REPRESENTATIVE CONCENTRATIONS FOR CONSTRUCTION WORKER SOIL TO TYPICAL DEPTH OF CONSTRUCTION CHEMICALS OF CONCERN Inhalation of Vapors and Particulates, Dermal Contact, and Accidental Ingestion Dieldrin 2.79E-01 Note: Representative Concentration [mg/kg] Page 12 of 18 Sheet name REPC-CON ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 DECAY RATE AND UNSATURATED ZONE DAF First-Order Unsaturated CHEMICALS OF CONCERN Decay Rate Zone DAF [day-1] Dieldrin 0.00E+00 1 Notes: NA: Not available Page 13 of 18 Sheet name DECAYDAFunsat ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 RISK/HAZARD QUOTIENT FOR RESIDENTIAL RECEPTORS CHILD SURFICIAL SOIL SURFICIAL SOIL CHEMICALS OF CONCERN Risk HQ Risk HQ Risk HQ Risk HQ Risk HQ Risk HQ Risk HQ Risk HQ Dieldrin 8.45E-06 1.23E-01 5.23E-07 7.62E-03 1.25E-05 3.65E-02 8.83E-07 2.58E-03 Notes: NPCP: A physical-chemical parameter, required in the calculation of the value, is not available. NTOX: The toxicity parameter(s) required in the calculation of the value, is not available. NCOC: The chemical is not a COC for the pathway because it was selected, but no representative concentration was entered. SOIL-VAPOR Indoor Inhalation of Vapor Emissions AGE-ADJUSTED SUB-SURFACE SOIL GROUNDWATER SUB-SURFACE SOIL GROUNDWATER Inhalation of Vapors and Particulates, Dermal Contact, and Accidental Ingestion Indoor Inhalation of Vapor Emissions Indoor Inhalation of Vapor Emissions SOIL-VAPOR Indoor Inhalation of Vapor Emissions Inhalation of Vapors and Particulates, Dermal Contact, and Accidental Ingestion Indoor Inhalation of Vapor Emissions Indoor Inhalation of Vapor Emissions Page 14 of 18 Sheet name RISK R ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 RISK/HAZARD QUOTIENT FOR NON-RESIDENTIAL RECEPTORS SURFICIAL SOIL CHEMICALS OF CONCERN Risk HQ Risk HQ Risk HQ Risk HQ Dieldrin 4.57E-07 6.05E-03 1.35E-08 1.79E-04 Notes: NPCP: A physical-chemical parameter, required in the calculation of the value, is not available. NTOX: The toxicity parameter(s) required in the calculation of the value, is not available. NCOC: The chemical is not a COC for the pathway because it was selected, but no representative concentration was entered. SUB-SURFACE SOIL GROUNDWATER SOIL-VAPOR Indoor Inhalation of Vapor Emissions Inhalation of Vapors and Particulates, Dermal Contact, and Accidental Ingestion Indoor Inhalation of Vapor Emissions Indoor Inhalation of Vapor Emissions Page 15 of 18 Sheet name RISK NR ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 RISK/HAZARD QUOTIENT FOR CONSTRUCTION WORKERS SURFICIAL SOIL Risk HQ Dieldrin 5.82E-08 5.09E-03 Notes: NTOX: The toxicity parameter(s) required in the calculation of the value, is not available. NCOC: The chemical is not a COC for the pathway because it was selected, but no representative concentration was entered. NPCP: A physical-chemical parameter, required in the calculation of the value, is not available. Inhalation of Vapors and Particulates, Dermal Contact, and Accidental Ingestion CHEMICALS OF CONCERN Page 16 of 18 Sheet name RISK CON ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RE-1 SUMMARY OF CUMULATIVE RISK AND HAZARD INDEX RECEPTOR RESIDENTIAL NON-RESIDENTIAL CONSTRUCTION WORKER CHILD AGE-ADJUSTED Risk Hazard Index Risk Hazard Index Risk Hazard Index Risk Hazard Index Surface Soil: Inhalation of Vapors and Particulates, Dermal Contact, and Accidental Ingestion 8.45E-06 1.23E-01 1.25E-05 3.65E-02 4.57E-07 6.05E-03 5.82E-08 5.09E-03 Subsurface Soil: Indoor Inhalation of Vapor Emissions 5.23E-07 7.62E-03 8.83E-07 2.58E-03 1.35E-08 1.79E-04 Not Applicable Not Applicable Groundwater: Indoor Inhalation of Vapor Emissions NA NA NA NA NA NA Not Applicable Not Applicable Soil-Vapor: Indoor Inhalation of Vapor Emissions from Soil and/or Groundwater NA NA NA NA NA NA Not Applicable Not Applicable Site Risk 8.98E-06 1.34E-05 4.70E-07 5.82E-08 Site Hazard Index 1.31E-01 3.91E-02 6.23E-03 5.09E-03 RATL-1/RATL-2 Required? NO NO YES NO NO NO NO NO Notes: Routes of Exposure NA: Not applicable because the chemical is not a COC for the pathway (no representative concentration entered) or its properties (toxicity and/or physical-chemical) are not available. Page 17 of 18 Sheet name RISK SUM ---PAGE BREAK--- Rachel Gibeault ReHistoric 7/7/2016 RATL-1 FOR RESIDENTIAL RECEPTORS CHILD - RATLs NOT REQUIRED AGE-ADJUSTED SURFICIAL SOIL SUB-SURFACE SOIL GROUNDWATER SOIL-VAPOR SURFICIAL SOIL SUB-SURFACE SOIL GROUNDWATER SOIL-VAPOR CHEMICALS OF CONCERN [mg/kg] [mg/kg] [mg/L] [ug/m3] [mg/kg] [mg/kg] [mg/L] [g/m3] Dieldrin 1.65E-01 2.67E+00 NA NA 1.12E-01 1.58E+00 NA NA Notes: NA: Not applicable because the chemical is not a COC for the pathway (no representative concentration entered) or its properties (toxicity and/or physical-chemical) are not available. Indoor Inhalation of Vapor Emissions Inhalation of Vapors and Particulates, Dermal Contact, and Accidental Ingestion Indoor Inhalation of Vapor Emissions Indoor Inhalation of Vapor Emissions Indoor Inhalation of Vapor Emissions Inhalation of Vapors and Particulates, Dermal Contact, and Accidental Ingestion Indoor Inhalation of Vapor Emissions Indoor Inhalation of Vapor Emissions Page 18 of 18 Sheet name RATL R