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Home My WebLink About16036_PCA Inter_Closure Report-Addendum 2010.04.10 Closure Report Former PCA Facility 815 Matthews Mint Hill Road Matthews, Mecklenburg County, North Carolina Terracon Project No. 71087772 April 16, 2010 Prepared for: CPI Corp. 1706 Washington Avenue St. Louis, Missouri 63103 Prepared by: Charlotte, North Carolina Terracon Consultants, Inc. 2020 Starita Road, Suite E Charlotte, NC 28206 [704] 509 1777 terracon.com April 16, 2010 North Carolina Department of Environment and Natural Resources Division of Waste Management Hazardous Waste Section 1646 Mail Service Road Raleigh, North Carolina 27699 Attn. Ms. Robin Proctor Re: Closure Report Former PCA Facility 815 Matthews Mint Hill Road Matthews, Mecklenburg County, North Carolina Terracon Project No. 71087772 Dear Ms. Proctor: Terracon is pleased to submit this Closure Report to the North Carolina Department of Environment and Natural Resources (NCDENR) Hazardous Waste Section on behalf of CPI Corp. The Closure Report was completed to provide our results of the soil and groundwater activities conducted at the former PCA Facility located at 815 Matthews Mint Hill Road in Matthews, North Carolina (Figure 1). These activities were conducted as a result of a confirmed release of silver detected in the subsurface soils located beneath the basement of the PCA building due to past photograph development processes. We appreciate your assistance and regulatory guidance as we completed the reported activities in conformance with the Hazardous Waste Section Generator Closure Guidelines. Please contact us if you have questions regarding our closure activities. Sincerely, Chris Kelly, LEED AP Christopher L. Corbitt, P.G. Environmental Scientist Environmental Services Manager CC: Ms. Shirley Touchette of CPI Corp. TABLE OF CONTENTS 1.0 INTRODUCTION ............................................................................................................... 1 1.1 Project Background.................................................................................................... 1 1.2 Photofinishing Chemistry Background ....................................................................... 2 1.3 Fate of Silver Thiosulfate in the Environment ............................................................ 3 1.4 Physical Properties of Silver Sulfide .......................................................................... 4 2.0 FIELD ACTIVITIES ........................................................................................................... 4 2.1 Initial Basement Soil Sampling .................................................................................. 4 2.2 Horizontal and Vertical Delineation of Silver-Impacted Soils ..................................... 6 3.0 GROUNDWATER ASSESSMENT ................................................................................... 8 3.1 Groundwater Well Installation .................................................................................... 8 3.2 Groundwater Analytical Results ................................................................................. 8 3.3 Receptor Survey ........................................................................................................ 9 4.0 FINDINGS, CONCLUSIONS, AND RECOMMENDATIONS .......................................... 11 4.1 Findings and Conclusions ........................................................................................ 11 4.2 Recommendations ................................................................................................... 12 APPENDICES Appendix A Site Diagrams and Boring Locations Figure 1 – Topographic Vicinity Map Figure 2 – Basement Boring Location Diagram Figure 3 – Silver Concentrations in the Basement (0-4 feet) Figure 4 – Silver Concentrations in the Basement (4-8 feet) Figure 5 – Silver Concentrations in the Basement (8-12 feet) Figure 6 – Groundwater Monitoring Well Locations Figure 7 – 1,500 Foot Receptor Survey Map Figure 8 – Background Soil Sample Location Map Appendix B Silver Concentrations in Soil Appendix C Laboratory Analytical Results Appendix D Silver and the Environment Technical Paper Appendix E North Carolina Department of Environment and Natural Resources Comments Appendix F S&ME, Inc. April 2009 Environmental Sampling Analytical Data Appendix G Groundwater Monitoring Well Abandonment Forms 1 Closure Report Former PCA Facility 815 Matthews Mint Hill Road Matthews, Mecklenburg County, North Carolina Project No. 71087772 April 16, 2010 1.0 INTRODUCTION 1.1 Project Background The PCA facility in Matthews was the headquarters of a former photo finisher for the Wal-Mart Commercial Portrait Studios. The operations at the facility included development of color photographs from color negatives received from various portrait studios. PCA International and subsequently CPI Corp utilized the basement of the existing on-site building for storage of photograph developing compounds and solutions, a silver reclamation system and management of waste water from the photo developing processes conducted at the facility. CPI Corp. (our Client) purchased PCA's assets in 2007, operated the facility for approximately one year, and then closed the facility at the end of 2008. CPI Corp. removed the equipment from the building and is conducting environmental assessments of the former operations. After removal of equipment and storage tanks from the basement of the building, CPI assessed subsurface soils under the basement for silver. The floor slab in the basement of the facility was observed to be in poor condition. The Client contracted with S&ME, Inc. (S&ME) in April 2009, to conduct sampling and analyses of the quarry tile, settling bed and liner within the basement of the Matthews facility to determine proper disposal options for these materials. The parameters for which these samples were analyzed were based on the requirements of the landfill and CPI's knowledge of the composition of photographic finishing process chemistry. Based on the analytical results of the samples collected by S&ME, the only chemical of concern identified with the potential for impacting subsurface soils beneath the basement floor was silver. Levels of other metals were detected above laboratory detection limits that may have been considered above background levels. Specifically, barium and cadmium were detected at slightly elevated levels; however, the concentrations were not detected more than 20x the Hazardous Waste Limits in the quarry tile, setting bed, and liner. Detected concentrations of barium were not above NCDENR SSLs or PRGs. The reported concentrations of chromium, cadmium, and mercury were detected above their respective NCDENR SSL. The level for mercury was determined to be consistent with detected background levels and appears to be naturally occurring at the site. Cadmium and chromium were both detected above the SSLs in tiles and the bedding at the site; however, these compounds were not utilized in the photographic development processes utilized at the former PCA facility. Former PCA Facility Terracon Project No. 71087772 April 16, 2010 2 Two possible decomposition by-products, reactive sulfide and reactive cyanide, were both analyzed in the worst case scenario settling bed and tile samples, collected by S&ME, as a safety precaution for construction workers. Neither reactive sulfide nor reactive cyanide were detected above laboratory detection limits in the worst case scenario setting bed and tile and would therefore not be considered to be a concern in the basement soils beneath the existing concrete foundation during the planned excavations. Based on Ms. Touchette’s and Mr. Price’s experiences in the photographic development business and through experiences in closing out similar facilities utilizing similar compounds, CPI Corp. has determined that silver is the only contaminant of concern at the Matthews, NC site. As such, it was the opinion of S&ME and CPI Corp. that barium, cadmium, chromium, mercury, and other metals detected were naturally occurring in materials used to create the tiles and/or naturally occurring in soils at the site. Since the tile, setting bed, and liner are considered to be the worst case scenario location at the site for release of compounds to soils, it is Terracon's opinion that total silver is the only chemical of concern for which the soils underlying the basement should be analyzed during the planned excavation activities. A copy of the April 2009 S&ME analytical results is provided as Appendix F. 1.2 Photofinishing Chemistry Background According to Ms. Shirley Touchette, an Environmental Specialist with CPI Corp., extensive knowledge and experience with the photographic process and the environmental effects of these processes, has been accumulated by herself, and Mr. Tim Price, Vice President of Risk Management with CPI Corp. Mr. Price indicated the former PCA facility utilized the EP-2 and RA-4 chemical processes to develop color photographic paper and the C-41 chemical process to develop color film. The photofinishing operation consists of treating a silver halide-sensitized material with a series of dilute chemical solutions and wash steps to produce a visible image. The C-41 fixer processing solution (film) is composed of ammonium thiosulfate (58%) and sodium sulfite. The EP-2/RA-4 bleach-fix processing solution (paper) is mainly composed of ferric ammonium EDTA (60%), ammonium thiosulfate (58%) and sodium sulfite. During the processing of photographic film and paper, silver is removed from the film and paper by two of the chemical processing solutions. During this process, the ammonium thiosulfate is converted into silver thiosulfate. The fixer from the film processor is electrolytically desilvered, and then regenerated for reuse. The bleach-fix from the paper processors is also electrolytically desilvered separately from the C-41 Fixer and regenerated for reuse in the paper processors. Excess bleach-fix flows through a set of metallic replacement cartridges (removes remaining silver) before discharge to the sanitary sewer. The process wastewater from this facility was discharged in compliance with an industrial discharge permit issued by the Charlotte-Mecklenburg Utility District. Former PCA Facility Terracon Project No. 71087772 April 16, 2010 3 1.3 Fate of Silver Thiosulfate in the Environment During photographic processing, silver is removed from the film and paper by a solution containing an excess of thiosulfate ions. The predominant complex formed is silver thiosulfate. Various scientific studies, referenced below, have shown that in the natural environment, silver thiosulfate is converted to silver sulfide, a nontoxic compound to bio-organisms. 1. Silver in the Environmental by A.C. Cooley, T.J. Dagon, P.W. Jenkins, and K.A. Robillard. “During secondary waste treatment, most of the silver in photoprocessing effluents is removed and incorporated into the sludge. Silver is a chalcophilic element, and the principal form of silver in sludges is reported to be Ag2S. This is the most abundant, naturally occurring silver compound in the environment, and probably the least toxic of all silver compounds. The total concentration of silver in sludges from POTWs treating both municipal sewage and a high percentage of photoprocessing effluents was found to be 450-27,000 mg/kg dry weight.” 2. Silver in Photoprocessing Effluents by C.C. Bard, J.J. Murphy, D.L. Stone and C.J. Terhaar. “Extremely insoluble silver sulfide has no effect at 100 mg/l. It is evident that the toxicity of silver to biological treatment plants depends on the free silver ion concentration. Thus, the form of silver in photographic effluents, i.e. silver thiosulfate complex, like insoluble silver sulfide, has no inhibitory effect on activated sludge.” 3. Fate and Speciation of Silver in Publicly Owned Treatment Works by Paul E. Lytle. “Silver released from photoprocessing operations is in a stable, silver thiosulfate complex. There is excess thiosulfate in photoprocessing effluents available to complex all of the silver. On secondary waste treatment, this silver thiosulfate complex is mostly converted to insoluble silver sulfide, with some metallic silver being formed. Because of their low solubilities, both silver sulfide and metallic silver are subsequently collected in the settled sludges. Silver sulfide was described by Lockhart as being one of the most insoluble inorganic salts known, with a solubility of 3 x 10-10 g/l in natural waters. Because of the extremely low solubility, he concluded that only very small quantities of silver escaping secondary treatment would be in the free, ionic form. “ 4. The Influence of Speciation on the Toxicity of Silver to Fathead Minnow by G.A. Leblanc, J.D. Mastone, A.P. Paradice, B.F. Wilson, M.B. Lockhart Jr., and K.A. Robillard. Former PCA Facility Terracon Project No. 71087772 April 16, 2010 4 “The results show conclusively that silver speciation markedly influences the toxicity of silver to fish. Compared with the free silver ion, silver chloride was found to be about 300 times less toxic acutely, silver sulfide was found to be at least 15,000 times less toxic acutely and silver thiosulfate complex over 17,500 times less toxic acutely.” 1.4 Physical Properties of Silver Sulfide The most common form of naturally occurring silver ore is argentite, commonly called, silver sulfide. Silver is a very inactive metal. It does not react with oxygen in the air under normal circumstances; however, it does react slowly with sulfur compounds in the air, forming silver sulfide. The solubility factor, referred to as Ksp, of silver sulfide is 6.0 x 10-51. In comparison, the Ksp of silver nitrate is 51.6. There is clear evidence that silver present as silver-thiosulfate complex in photographic processing effluents can be adequately treated biologically. Most of the silver-thiosulfate complex will be converted biologically to forms such as metallic silver and silver sulfide. There are two types of in-situ remediation techniques for silver-contaminated soils, stabilization and bioremediation. The stabilization technique converts soluble silver compounds to silver sulfide by injecting sulfur compounds, specifically polysulfides, into the contaminated soils. Bioremediation also injects polysulfides into the contaminated soils, with the addition of a food source for the bacteria. This food source is typically a food-grade vegetable oil. Both in-situ remediation techniques convert soluble silver into insoluble silver sulfide. 2.0 FIELD ACTIVITIES 2.1 Initial Basement Soil Sampling Terracon visited the site on June 25, 2009 to obtain samples of subsurface soils from beneath the concrete floor slab. Concrete coring equipment was utilized to core through the floor slab within the basement of the existing on-site building at 13 locations selected by the Client to correspond to locations of former silver reclamation equipment, silver developing compound storage, and other areas with the potential for release of silver to subsurface soils (Figure 2). After completion of the 4-inch diameter concrete cores, a hand auger was advanced to a depth of 3 to 4 feet below the floor slab. Terracon personnel noted the color, odor, and lithological characteristics of the soils beneath the building slab. Soils were not screened for volatile organic compounds (VOCs) since they were not identified as being used by past operations at the site. Auger refusal was encountered in two of the hand auger borings, requiring an additional two concrete cores to be completed in areas of concern. Former PCA Facility Terracon Project No. 71087772 April 16, 2010 5 Two additional hand auger borings were advanced at locations outside the building to establish naturally occurring background levels for silver at the PCA property. Soil samples collected at the site were placed in laboratory provided bottles for transport to Pace Analytical Services, Inc. of Huntersville, North Carolina. After completion of the soil sampling activities, the concrete floor slab was not patched at the request of the Client. Soil samples collected at the site were analyzed for total silver by EPA Method 6010 and silver by the Toxicity Characteristic Leachate Procedure (TCLP). The following table presents the results of the silver analyses. A copy of the laboratory results is provided in Appendix C. Table 1: Silver Analytical Results Sample Location Total Silver by EPA Method 60101 TCLP Silver 7A 0.65 BDL Office 10 BDL 9A 7 BDL 5A BDL BDL 01(background) BDL BDL 02 (background) BDL BDL 7B BDL BDL 11A BDL BDL 14A 311 BDL 4A 1.2 BDL 13B 196 BDL Hall 13.9 BDL SumpN 12.2 BDL NCHWS – SSLs2 0.217 N/A EPA Region 9 PRGs3 390 – Residential 5,100 – Industrial N/A 1 – All results in milligrams/kilogram (mg/kg) 2 – North Carolina Hazardous Waste Section Soil Screening Levels (SSLs) Protective of Groundwater in mg/kg 3 – US Environmental Protection Agency Region 9 Preliminary Remediation Goals (PRGs) in mg/kg Bold font indicates an exceedance of the NCHWS SSL BDL – Below laboratory detection limits N/A – TCLP is an analytical technique designed to determine the potential ability of a specific compound to leach. The NCDENR recognizes TCLP results for waste characterization and disposal activities only. Former PCA Facility Terracon Project No. 71087772 April 16, 2010 6 Based on the laboratory analytical results, boring locations 14A and 13B exhibited the highest silver concentrations at 311 and 196 milligrams/kilogram (mg/kg), respectively. The remaining six soil samples exhibited much lower detectable concentrations of total silver. Based on the results of the two samples collected outside the building (naturally occurring background levels of silver were below detectable levels); it appears subsurface soils in the area of the basement have been impacted by a release of silver. The areas exhibiting the highest concentrations of silver are located beneath a sump in the northern portion of the basement area. The total silver concentrations detected in eight of the 13 soil samples submitted for laboratory analysis were compared to the North Carolina HWS SSLs and the USEPA Region 9 PRGs for Industrial Sites. We anticipate the PRG for Industrial Sites is the applicable standard for the site since the facility is not developed as residential and children are not exposed to the subsurface soils. While the detected total silver concentrations are well below the Industrial PRG, the detected levels are also below the EPA Region 9 PRG residential standards, a more stringent regulatory standard. The NCHWS SSLs are designed to be the most stringent screening levels because the SSLs are protective of groundwater and are typically established by the lowest laboratory detection limit obtainable. As such, silver was detected in the soils underlying the floor slab at levels that exceeded the NCHWS SSLs. Two background soil samples were collected from the exterior of the site building at the approximate depth of the samples obtained within the building’s basement. The two background samples did not exhibit detectable levels of total silver. The soil samples analyzed for TCLP silver did not exhibit detectable levels of silver. While TCLP is not considered an acceptable analytical method for evaluating in-place soils by the NCDENR Hazardous Waste Section, the TCLP analytical results are indicative of the insoluble nature of silver sulfide and the low potential for silver to leach from soils beneath the floor slab of the basement. Should the silver-impacted soils be excavated from beneath the building for off-site disposal, the materials would not be considered a hazardous waste. 2.2 Horizontal and Vertical Delineation of Silver-Impacted Soils On November 9 and 10, 2009, Terracon mobilized to the site to advance multiple soil borings throughout the basement for the purposes of horizontally and vertically delineating the extent of silver impacted soils. Twenty-six soil borings were advanced utilizing a direct-push/Geoprobe® drilling rig to various depths, as much as 20 feet below ground surface (bgs). Soil samples were collected, logged, and visually observed for indications of silver, generally depicted by black staining or discoloration. Selected soil samples collected during the basement delineation were submitted for laboratory analysis based on Terracon’s observations during boring activities. Soil samples were analyzed for silver by EPA Method 6010 and the results are provided in Appendix B. Based on the analytical results, it was determined elevated silver levels are present in two locations in the Former PCA Facility Terracon Project No. 71087772 April 16, 2010 7 basement. One area where silver was identified is located in the southern portion of the basement and was identified in one boring only. This area appears to be a small one-time release that is less than 10 feet by 10 feet laterally and extends no deeper than 4 feet bgs. The second area is located in the northern portion of the site and appears to extend approximately 30 feet by 40 feet laterally and to a depth of at least 16 feet bgs. The silver appears to be localized beneath a sump situated at a depth approximately 6 feet. The sump formerly collected runoff from processes and equipment within the basement and pumped the runoff to the silver reclamation system and subsequently, into aboveground wastewater storage tanks (ASTs) located in the southern portion of the basement. Black staining is an indicator of the presence of silver sulfide. Black stained soils were mostly observed near the sump and to the northeast, generally along the identified hydraulic gradient at the site. In addition to the sump area, black staining was also observed at a depth of approximately 6 feet to 12 feet bgs in soils to the south of the sump area where soils were impacted by a release from the sump and associated piping. In addition to analyzing for silver, certain soil samples collected during the basement delineation were analyzed for sulfides by EPA Method 4500S2D to evaluate the impacted soils for the presence of sulfides. The samples selected for analysis of sulfides included: 5B at 2 to 3 feet, 12A at 9 to 10 feet, 13A at 15 to 16 feet, 14B at 6 to 7 feet, and 14B-A at 3 to 4 feet. According to the laboratory analytical results, sulfides were not identified above laboratory detection limits. Analytical method 4500S2D is a wet chemistry method designed to detect soluble sulfides. Since the identified compound in subsurface soils at the facility is an insoluble form of silver sulfide, the analytical method is not able to detect silver sulfide. Terracon also investigated possible laboratory analytical methods capable of detecting silver sulfides. X-ray diffraction (XRD) was identified as a possible analytical method; however, based on interviews with several laboratories, the XRD technique was designed to determine the presence of compounds as percentages. The concentrations of silver were reported in parts per million, well below the capabilities of XRD. Other possible laboratory analytical methods for detection of silver sulfides were not identified; thus, the best method for determining the presence of silver sulfide in subsurface media is apparently by EPA Method 6010. Based on the laboratory results, detected concentrations in the two identified areas where elevated silver is reported are below the EPA Region 9 PRG residential standards but are above the NCDENR SSLs Protective of Groundwater. Based on the presence of silver above the NCDENR SSLs, a groundwater investigation was warranted. The findings of the groundwater monitoring well investigation and associated receptor survey which were completed in March 2010 are discussed below. It is Terracon’s opinion that further soil investigation within the basement of the PCA facility is not warranted. The floor of the basement is a concrete slab in generally fair to good condition Former PCA Facility Terracon Project No. 71087772 April 16, 2010 8 but there are some locally damaged areas. A network of lined trenches occurs throughout the building. It is Terracon’s understanding that CPI Corp. is planning to fill the trenches and restore and improve the condition of the concrete slab floor. The floor slab essentially caps the silver within the subsurface soils. CPI Corp. has also removed the silver reclamation equipment, wastewater ASTs, and other photoprocessing equipment from the basement of the building, considered to be the source of the silver contamination. 3.0 GROUNDWATER ASSESSMENT 3.1 Groundwater Well Installation Based on the results of sampling and delineation of silver-impacted soils in the basement area, silver was present above the NCDENR SSL Protective of Groundwater. Therefore in accordance with Hazardous Waste Section guidelines, Terracon installed three temporary groundwater monitoring wells to assess the presence of silver in groundwater. Terracon advanced three soil borings to groundwater utilizing a hollow stem auger drill rig with air hammer capabilities. Upon completion of each soil boring, a 2-inch temporary groundwater monitoring well was constructed utilizing 10 feet of pre-packed well screen with a PVC riser pipe to the ground surface in accordance with North Carolina Well Construction Standards. Sand was placed around the pre-packed screen to 2 feet above the screen. Hydrated bentonite grout was placed above the sand pack and used to seal the boring at the surface. The temporary wells were developed and allowed to equilibrate for more than 24 hours. After equilibration of the water levels, Terracon mobilized to the site to measure groundwater levels and survey the groundwater monitoring well locations relative to the on-site building for development of a scaled site diagram and to determine hydraulic gradient. Prior to sampling, the wells were purged of three well volumes and allowed to recharge and settle for approximately three hours. A groundwater sample was collected from each well and measured in the field with a turbidity meter. Groundwater samples collected from the site were placed in laboratory provided glassware and submitted for laboratory analysis of total silver by Method 3030C. After receipt of laboratory results, the drilling subcontractor remobilized to the site to close the temporary groundwater monitoring wells in accordance with NCDENR and Mecklenburg County Groundwater Well Regulations. Copies of the Monitoring Well Abandonment forms are provided in Appendix G. 3.2 Groundwater Analytical Results Prior to collecting the water samples, Terracon measured the turbidity to reduce the impact of suspended solids within the samples. Turbidity in well MW-1 was measured at 10.7 NTUs and the groundwater sample was submitted for laboratory analysis. Groundwater samples collected from wells MW-2 and MW-3 showed evidence of suspended sediments and elevated turbidity Former PCA Facility Terracon Project No. 71087772 April 16, 2010 9 levels. Due to the elevated turbidity in the water column of the two wells, suspended solids were allowed to settle for approximately two hours prior to re-sampling. While suspended sediments remained in the water samples, turbidity measurements were lower than previous measurements. Turbidity in well MW-2 was measured at 91 NTUs and in well MW-3 at 35.7 NTUs. The water samples from MW-2 and MW-3 were submitted for laboratory analysis. According to laboratory results, silver was not identified above laboratory detection limits in the three groundwater samples submitted for analysis. 3.3 Receptor Survey In order to identify potential environmental receptors on and near the former PCA site, Terracon conducted a receptor survey within a 1,500-foot radius of the site, an approximate 15.96-acre tract located at 815 Matthews Mint Hill Road in Matthews, Mecklenburg County, North Carolina. The receptor survey included the identification of drinking water supply wells, irrigation wells, churches, schools, daycare facilities, basements, and surface water. Terracon's receptor survey consisted of a review of U.S. Geological Survey (USGS) water well records; a review of the Mecklenburg County Well Information System; a request for information from the Mecklenburg County Environmental Health Department; attempts to interview personnel at the Charlotte- Mecklenburg Utilities Department (CMUD); and a drive-by or windshield search of public and private water wells and other potential receptors observable from public roads and rights-of-way within the 1500-foot radius of the site. Terracon also reviewed the Matthews and Mint Hill, North Carolina USGS topographic quadrangle maps to identify surficial waters within 1,500-feet of the site. 3.3.1 USGS File Review Terracon reviewed USGS water well information records for information regarding public supply water wells within the 1,500-foot radius of the PCA property boundary at the USGS National Water Information System website (http://waterdata.usgs.gov/nc/nwis/). According to the USGS records, water wells were not listed within the 1,500-foot radius of the site. 3.3.2 Mecklenburg County Well Information System Terracon reviewed the Mecklenburg County Well Information System (WIS) website (http://maps.co.mecklenburg.nc.us/wells/) for information regarding potable and irrigation water wells within the 1,500-foot radius of the site. Two facilities were listed as holding Mecklenburg County permits for wells within the 1,500 foot radius of the site. Novant Health – Presbyterian Hospital at 1500 Matthews Township Parkway maintains an active permit for use of a potable water well. The second facility, Intellicoat Technologies located at 700 Crestdale Road maintains 62 active monitoring wells associated with a contaminant release. While these facilities are located within the 1,500 foot radius of the site, they are located upgradient of the Former PCA Facility Terracon Project No. 71087772 April 16, 2010 10 PCA site. Therefore, the presence of active wells within the 1,500 foot search radius of the site, according to the Mecklenburg County Well Information System does not adversely impact the risk status related to nearby receptors. 3.3.3 Mecklenburg County Environmental Health Department Terracon requested information from the Mecklenburg County Environmental Health Department (MCEHD) concerning potable drinking water wells located within the search area. At the issuance of this report, Terracon has not received a return response from the MCEHD. The MCEHD does not typically maintain records of water wells since this information is provided on the Mecklenburg County Well Information System. 3.3.4 Charlotte Mecklenburg Utilities Department Terracon made attempts to contact the Charlotte Mecklenburg Utilities Department (CMUD) for information regarding the presence of potable water wells within the 1,500-foot radius of the site and to confirm the site and surrounding areas are provided municipal water and sanitary sewer services by CMUD. At the issuance of this report, Terracon has not received a response from CMUD. 3.3.5 1,500-Foot Radius Windshield Survey Terracon conducted a windshield search of properties viewable from public rights-of-way. No evidence of water wells was identified from publicly accessible vantage points within the 1,500- foot radius of the site. During the windshield survey, Terracon identified Presbyterian Hospital within the 1,500-foot radius as the nearest sensitive location, including churches, schools, day care centers, or hospitals. No evidence of basements was observed associated with businesses or residences within the 1,500-foot radius of the site. No evidence of irrigation wells, well houses, or groundwater monitoring wells was observed within the 1,500-foot radius of the site, other than those previously discussed. 3.3.6 Surficial Waters Based on Terracon’s review of the USGS topographic maps, the closest surficial water to the site is located approximately 100 feet to the northeast and is identified as an unnamed tributary of McAlpine Creek. McAlpine Creek is located approximately one mile north of the site. Terracon confirmed the locations of the unnamed tributary and McAlpine Creek as depicted by the USGS topographic maps. Hydraulic gradients measured from the on-site groundwater wells indicate groundwater migrates to the northeast toward the unnamed tributary. Based on the lack of detectable silver in groundwater at the site and an approximate 800-ft distance from the Former PCA Facility Terracon Project No. 71087772 April 16, 2010 11 source of the silver release to the unnamed tributary, the documented release at the site is not expected to impact the unnamed tributary of McAlpine Creek. 3.3.7 Receptor Survey Conclusions Based on Terracon’s observations and review of government records, water-supply wells and groundwater monitoring wells are currently located within a 1,500-foot radius of the site. The closest sensitive receptor is Presbyterian Hospital-Matthews which maintains an active potable water well. The nearest surface water is an unnamed tributary of McAlpine Creek located about 800 feet to the northeast of the source area at the site. It is Terracon’s opinion that the presence of sensitive receptors within the 1,500 foot radius of the site does not have an adverse impact on the regulatory risk status of the site. 4.0 FINDINGS, CONCLUSIONS, AND RECOMMENDATIONS 4.1 Findings and Conclusions Based on the completion of soil and groundwater sampling activities, Terracon has identified the presence of silver at concentrations that exceed the NCDENR SSLs Protective of Groundwater in soils located beneath the basement area of the former PCA facility located at 815 Matthews Mint Hill Road in Matthews, Mecklenburg County, North Carolina. The extent of silver in the soils has been horizontally and vertically delineated to the extent possible within the basement area. Although the extent of silver impact was not completely delineated, the sources of the silver were identified and silver concentrations were shown to significantly decrease at vertical and lateral distances further from the source areas. Since the NCDENR SSLs Protective of Groundwater for silver were exceeded at the site, Terracon conducted a groundwater assessment at the site by installing three groundwater monitoring wells. One monitoring well was installed in an upgradient location and two monitoring wells were located in a downgradient location relative to the basement of the building. Groundwater samples collected from the monitoring wells did not indicate the presence of detectable levels of silver. Sensitive receptors, including an actively used potable water well, monitoring wells, a hospital, and a surficial stream were identified within the 1,500 foot radius of the site. However, the only sensitive receptor identified downgradient of the former PCA facility is an unnamed tributary of McAlpine Creek located northeast of the site. On-site well MW-3 which had no detectable quantities of silver in groundwater is located between the source areas of the silver and the tributary. Former PCA Facility Terracon Project No. 71087772 April 16, 2010 12 4.2 Recommendations While silver concentrations in soils beneath the basement of the former PCA facility were detected above the NCDENR SSL Protective of Groundwater, groundwater did not exhibit detectable levels of silver. Based on the photograph developing and finishing process that formerly operated at the site, silver released to the soils is an insoluble form of a silver sulfide compound with a low potential to migrate easily through soils or groundwater. Therefore, it is Terracon’s opinion that groundwater at the site has not been adversely impacted by the presence of silver in soils. In addition to the NCDENR SSLs, Terracon compared the silver concentrations in the soils with the EPA Region 9 PRGs Residential Standard. None of the reported levels of silver exceed the residential standard. As such, the presence of elevated silver in soils is not considered to be hazardous to human health in the event of accidental exposure. Additionally, no active sources are currently contributing to the silver-impacted soils because the setting beds, wastewater tanks, and photographic developing equipment have been removed from the site. CPI Corp. is currently soliciting bids for cleanup of the concrete floor within the basement for the purpose of filling pipe trenches and restoring the condition of the floor and applying a coating to the floor surface. The concrete floor caps the silver-impacted soils beneath the basement area. Since silver was not detected in the groundwater, it is unlikely that identified sensitive receptors within the 1,500 foot radius of the site would be impacted. The silver in the soils is a silver sulfide compound that is insoluble and non-leachable with a low potential to migrate significantly from the basement source area. Based on the results of our soil and groundwater sampling activities and future plans to restore the basement area at the former PCA facility, silver-impacted soils located beneath the basement area will be inaccessible to the public and future building occupants, and will not pose a threat to public health. Therefore, Terracon, on behalf of CPI Corp., is requesting regulatory closure of the former PCA facility in accordance with NCDENR Division of Waste Management Hazardous Waste Section Generator Closure Guidelines. Appendix A Appendix B Table 1: Results of Total Silver in SoilsFormer PCA FacilityMatthews, North CarolinaTerracon Project: 710877720 to 1 1 to 2 2 to 3 3 to 4 4 to 5 5 to 6 6 to 7 7 to 8 8 to 9 9 to 10 10 to 11 11 to 12 12 to 13 13 to 14 14 to 15 15 to 160A11/9/2009156BDL X X0BN/A1B11/10/2009 X X145XX2A11/10/2009 BDL BDL X2B11/10/2009 BDL BDL X X3B11/10/2009 BDL BDL X X4A6/25/2009 and 11/10/20091.2BDL X X5A6/25/2009 BDL5B11/10/20090.76BDL X7A6/25/20090.657A-A11/9/2009 BDL BDL X X7B6/25/2009 BDL8B11/10/20091.5BDL X9A6/25/20097.09A-A11/9/2009 BDL BDL X X9B11/10/2009 BDL BDL X X10A11/10/20093.6BDL X X10B11/9/2009 X BDL X BDL X11A6/25/2009 BDL11B11/10/2009 X1.8BDL BDL X12A11/9/20091.4 7.3X3.712B11/9/2009 BDL0.47XX13A11/9/200936.8X110X18813B6/25/200919613B-A11/9/20092.1XX4.9X14A6/25/2009 and 11/9/2009311 68.9X171X13414B11/9/20090.42X BDL X48.514B-A11/10/2009237 24.6XXSumpN6/25/200912.2SumpN-A11/9/2009 X X8.0XXXOffice6/25/200910.0Office A11/9/2009 X4.2X9.7XOffice B11/9/2009 X1.0XX129Office CN/AOffice D11/10/2009 X BDL X BDLHall6/25/200913.9O1 (Outside 1)6/25/2009 BDLO2 (Outside 2)6/25/2009 BDLO3 (Outside 3)8/24/2009 0.033JO4 (Outside 4)8/24/20090.65JO5 (Outside 5)8/24/2009 BDLAll results in milligrams/kilogram (mg/kg)Bold font indicates concentrations are above the NCDENR Hazardous Waste Branch Soil Screening Level for silver (0.217 mg/kg)J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limitX - Soil sample was not submitted for laboratory analysisEmpty field denotes sample was not collected from that intervalN/A - Sample not collected`BDL - Below laboratory detection limitsBoring LocationDate SampledSample Depth (in feet below grade) Appendix C June 30, 2009 LIMS USE: FR - HEATHER LIMS OBJECT ID: 9247389 9247389 Project: Pace Project No.: RE: Ms. Heather Crutchfield Terracon 2020-E Starita Road Charlotte, NC 28206 CPI Corporation Dear Ms. Crutchfield: Enclosed are the analytical results for sample(s) received by the laboratory on June 26, 2009. The results relate only to the samples included in this report. Results reported herein conform to the most current NELAC standards, where applicable, unless otherwise narrated in the body of the report. Inorganic Wet Chemistry and Metals analyses were performed at our Pace Asheville laboratory and Organic testing was performed at our Pace Huntersville laboratory unless otherwise footnoted. All Microbiological analyses were performed at the laboratory where the samples were received. If you have any questions concerning this report, please feel free to contact me. Sincerely, Kevin Herring kevin.herring@pacelabs.com Project Manager Enclosures cc:Mr. Chris Corbitt, Terracon REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 1 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 CERTIFICATIONS Pace Project No.: Project: 9247389 CPI Corporation Charlotte Certification IDsWest Virginia Certification #: 357Virginia Certification #: 00213 Tennessee Certification #: 04010South Carolina Drinking Water Cert. #: 990060003South Carolina Certification #: 990060001Pennsylvania Certification #: 68-00784Connecticut Certification #: PH-0104 North Carolina Field Services Certification #: 5342North Carolina Drinking Water Certification #: 37706 New Jersey Certification #: NC012Louisiana/LELAP Certification #: 04034Kentucky UST Certification #: 84Florida/NELAP Certification #: E87627North Carolina Wastewater Certification #: 12 Asheville Certification IDs West Virginia Certification #: 356 Virginia Certification #: 00072Connecticut Certification #: PH-0106Florida/NELAP Certification #: E87648 Tennessee Certification #: 2980South Carolina Certification #: 99030001 South Carolina Bioassay Certification #: 99030002 Pennsylvania Certification #: 68-03578 North Carolina Wastewater Certification #: 40North Carolina Drinking Water Certification #: 37712North Carolina Bioassay Certification #: 9 New Jersey Certification #: NC011Massachusetts Certification #: M-NC030 Louisiana/LELAP Certification #: 03095 Eden Certification IDs North Carolina Wastewater Certification #: 633 Virginia Drinking Water Certification #: 00424 North Carolina Drinking Water Certification #: 37738 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 2 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 SAMPLE ANALYTE COUNT Pace Project No.: Project: 9247389 CPI Corporation Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 9247389001 7A ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389002 Office ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389003 9A ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389004 5A ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389005 01 ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389006 02 ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389007 7B ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389008 11A ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389009 14A ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389010 4A ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389011 13B ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389012 HALL ASTM D2974-87 1 PASI-CKDF EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS 9247389013 SUMPN ASTM D2974-87 1 PASI-CKDF REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 3 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 SAMPLE ANALYTE COUNT Pace Project No.: Project: 9247389 CPI Corporation Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts EPA 6010 1 PASI-AEWS EPA 6010 1 PASI-AEWS REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 4 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:7A Lab ID:9247389001 Collected:06/25/09 10:15 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 0.65 mg/kg 1 06/29/09 15:48 7440-22-406/29/09 09:500.58 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 16:41 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 24.4 %1 06/29/09 14:080.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 5 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:Office Lab ID:9247389002 Collected:06/25/09 11:10 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 10.0 mg/kg 1 06/29/09 15:59 7440-22-4 R106/29/09 09:500.57 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 16:48 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 22.0 %1 06/29/09 14:090.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 6 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:9A Lab ID:9247389003 Collected:06/25/09 11:40 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 7.0 mg/kg 1 06/29/09 16:09 7440-22-406/29/09 09:500.48 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 16:56 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 24.0 %1 06/29/09 14:090.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 7 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:5A Lab ID:9247389004 Collected:06/25/09 12:40 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 06/29/09 16:15 7440-22-406/29/09 09:500.60 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 17:00 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 34.4 %1 06/29/09 14:090.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 8 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:01 Lab ID:9247389005 Collected:06/25/09 13:05 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 06/29/09 16:20 7440-22-406/29/09 09:500.43 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 17:03 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 17.9 %1 06/29/09 14:100.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 9 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:02 Lab ID:9247389006 Collected:06/25/09 13:30 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 06/29/09 16:26 7440-22-406/29/09 09:500.32 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 17:06 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 17.2 %1 06/29/09 14:100.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 10 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:7B Lab ID:9247389007 Collected:06/25/09 13:50 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 06/29/09 16:41 7440-22-406/29/09 09:500.60 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 17:20 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 29.5 %1 06/29/09 14:110.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 11 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:11A Lab ID:9247389008 Collected:06/25/09 14:25 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 06/29/09 16:47 7440-22-406/29/09 09:500.45 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 17:23 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 24.8 %1 06/29/09 14:110.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 12 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:14A Lab ID:9247389009 Collected:06/25/09 15:20 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 311 mg/kg 1 06/29/09 16:53 7440-22-406/29/09 09:500.62 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 17:26 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 23.8 %1 06/29/09 14:110.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 13 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:4A Lab ID:9247389010 Collected:06/25/09 17:05 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 1.2 mg/kg 1 06/29/09 16:58 7440-22-406/29/09 09:500.65 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 17:31 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 39.4 %1 06/29/09 14:110.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 14 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:13B Lab ID:9247389011 Collected:06/25/09 16:10 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 196 mg/kg 1 06/29/09 17:03 7440-22-406/29/09 09:500.52 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 17:34 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 23.3 %1 06/29/09 14:120.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 15 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:HALL Lab ID:9247389012 Collected:06/25/09 16:25 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 13.9 mg/kg 1 06/29/09 17:09 7440-22-406/29/09 09:500.67 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 17:37 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 30.5 %1 06/29/09 14:120.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 16 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9247389 CPI Corporation Sample:SUMPN Lab ID:9247389013 Collected:06/25/09 16:45 Received:06/26/09 08:45 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 12.2 mg/kg 1 06/29/09 17:14 7440-22-406/29/09 09:500.58 6010 MET ICP, TCLP Analytical Method: EPA 6010 Preparation Method: EPA 3010 Leachate Method/Date: EPA 1311; 06/27/09 13:30 Silver ND mg/L 1 06/30/09 17:41 7440-22-406/30/09 08:540.025 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 22.7 %1 06/29/09 14:120.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 17 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9247389 CPI Corporation QC Batch: QC Batch Method: Analysis Method: Analysis Description: MPRP/4664 EPA 3050 EPA 6010 6010 MET Associated Lab Samples:9247389001, 9247389002, 9247389003, 9247389004, 9247389005, 9247389006, 9247389007, 9247389008, 9247389009, 9247389010, 9247389011, 9247389012, 9247389013 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:300976 Associated Lab Samples:9247389001, 9247389002, 9247389003, 9247389004, 9247389005, 9247389006, 9247389007, 9247389008, 9247389009, 9247389010, 9247389011, 9247389012, 9247389013 Matrix:Solid Analyzed Silver mg/kg ND 0.50 06/29/09 15:41 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 300977LABORATORY CONTROL SAMPLE: LCSSpike Silver mg/kg 25.025 100 80-120 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 300978MATRIX SPIKE SAMPLE: MSSpike Result 9247389001 Silver mg/kg 26.824.7 106 75-1250.65 Parameter Units Dup Result QualifiersRPDResult 9247389002 300979SAMPLE DUPLICATE: Silver mg/kg 14.0 R13310.0 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 18 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9247389 CPI Corporation QC Batch: QC Batch Method: Analysis Method: Analysis Description: MPRP/4671 EPA 3010 EPA 6010 6010 MET TCLP Associated Lab Samples:9247389001, 9247389002, 9247389003, 9247389004, 9247389005, 9247389006, 9247389007, 9247389008, 9247389009, 9247389010, 9247389011, 9247389012, 9247389013 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:301402 Associated Lab Samples:9247389001, 9247389002, 9247389003, 9247389004, 9247389005, 9247389006, 9247389007, 9247389008, 9247389009, 9247389010, 9247389011, 9247389012, 9247389013 Matrix:Water Analyzed Silver mg/L ND 0.025 06/30/09 16:34 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 301403LABORATORY CONTROL SAMPLE: LCSSpike Silver mg/L 1.31.2 107 80-120 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 301404MATRIX SPIKE SAMPLE: MSSpike Result 9247389001 Silver mg/L 1.31.2 103 75-125ND Parameter Units Dup Result QualifiersRPDResult 9247389002 301405SAMPLE DUPLICATE: Silver mg/L .0019JND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 19 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9247389 CPI Corporation QC Batch: QC Batch Method: Analysis Method: Analysis Description: PMST/2555 ASTM D2974-87 ASTM D2974-87 Dry Weight/Percent Moisture Associated Lab Samples:9247389001, 9247389002, 9247389003, 9247389004, 9247389005, 9247389006, 9247389007, 9247389008, 9247389009, 9247389010, 9247389011, 9247389012, 9247389013 Parameter Units Dup Result QualifiersRPDResult 9247389001 300969SAMPLE DUPLICATE: Percent Moisture %24.9 224.4 Parameter Units Dup Result QualifiersRPDResult 9247292003 300970SAMPLE DUPLICATE: Percent Moisture %20.2 .720.1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 20 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALIFIERS Pace Project No.: Project: 9247389 CPI Corporation DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to changes in sample preparation, dilution of the sample aliquot, or moisture content. ND - Not Detected at or above adjusted reporting limit. J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. S - Surrogate 1,2-Diphenylhydrazine (8270 listed analyte) decomposes to Azobenzene. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. Pace Analytical is NELAP accredited. Contact your Pace PM for the current list of accredited analytes. U - Indicates the compound was analyzed for, but not detected. LABORATORIES Pace Analytical Services - AshevillePASI-A Pace Analytical Services - CharlottePASI-C ANALYTE QUALIFIERS RPD value was outside control limits.R1 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 06/30/2009 06:08 PM Page 21 of 21 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 August 28, 2009 LIMS USE: FR - CHRIS KELLY LIMS OBJECT ID: 9251579 9251579 Project: Pace Project No.: RE: Mr. Chris Kelly Terracon 2020 Starita Rd Charlotte, NC PCA Facility Dear Mr. Kelly: Enclosed are the analytical results for sample(s) received by the laboratory on August 24, 2009. The results relate only to the samples included in this report. Results reported herein conform to the most current NELAC standards, where applicable, unless otherwise narrated in the body of the report. Inorganic Wet Chemistry and Metals analyses were performed at our Pace Asheville laboratory and Organic testing was performed at our Pace Huntersville laboratory unless otherwise footnoted. All Microbiological analyses were performed at the laboratory where the samples were received. If you have any questions concerning this report, please feel free to contact me. Sincerely, Kevin Herring kevin.herring@pacelabs.com Project Manager Enclosures cc:Mr. Chris Corbitt, Terracon REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 1 of 7 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 CERTIFICATIONS Pace Project No.: Project: 9251579 PCA Facility Charlotte Certification IDsWest Virginia Certification #: 357Virginia Certification #: 00213 Connecticut Certification #: PH-0104Florida/NELAP Certification #: E87627Kentucky UST Certification #: 84Louisiana/LELAP Certification #: 04034New Jersey Certification #: NC012 North Carolina Drinking Water Certification #: 37706North Carolina Field Services Certification #: 5342 North Carolina Wastewater Certification #: 12Pennsylvania Certification #: 68-00784South Carolina Certification #: 990060001South Carolina Drinking Water Cert. #: 990060003Tennessee Certification #: 04010 Asheville Certification IDs West Virginia Certification #: 356 Florida/NELAP Certification #: E87648Louisiana/LELAP Certification #: 03095Massachusetts Certification #: M-NC030 New Jersey Certification #: NC011North Carolina Bioassay Certification #: 9 Connecticut Certification #: PH-0106 North Carolina Wastewater Certification #: 40 Pennsylvania Certification #: 68-03578South Carolina Bioassay Certification #: 99030002South Carolina Certification #: 99030001 Tennessee Certification #: 2980Virginia Certification #: 00072 North Carolina Drinking Water Certification #: 37712 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 2 of 7 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 SAMPLE SUMMARY Pace Project No.: Project: 9251579 PCA Facility Lab ID Sample ID Matrix Date Collected Date Received 9251579001 03 Solid 08/24/09 10:45 08/24/09 16:30 9251579002 04 Solid 08/24/09 11:05 08/24/09 16:30 9251579003 05 Solid 08/24/09 11:30 08/24/09 16:30 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 3 of 7 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 SAMPLE ANALYTE COUNT Pace Project No.: Project: 9251579 PCA Facility Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 9251579001 03 ASTM D2974-87 1 PASI-CCD1 EPA 6010 1 PASI-ASHB 9251579002 04 ASTM D2974-87 1 PASI-CCD1 EPA 6010 1 PASI-ASHB 9251579003 05 ASTM D2974-87 1 PASI-CCD1 EPA 6010 1 PASI-ASHB REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 4 of 7 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9251579 PCA Facility Sample:03 Lab ID:9251579001 Collected:08/24/09 10:45 Received:08/24/09 16:30 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 0.033J mg/kg 1 08/26/09 12:42 7440-22-408/25/09 13:370.51 0.031 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 19.5 %1 08/26/09 11:150.10 0.10 Sample:04 Lab ID:9251579002 Collected:08/24/09 11:05 Received:08/24/09 16:30 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 0.65J mg/kg 1 08/26/09 12:52 7440-22-408/25/09 13:370.92 0.055 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 46.6 %1 08/26/09 11:150.10 0.10 Sample:05 Lab ID:9251579003 Collected:08/24/09 11:30 Received:08/24/09 16:30 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit Report 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 08/26/09 13:13 7440-22-408/25/09 13:370.57 0.034 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 22.7 %1 08/26/09 11:150.10 0.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/28/2009 09:05 AM Page 5 of 7 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9251579 PCA Facility QC Batch: QC Batch Method: Analysis Method: Analysis Description: MPRP/4965 EPA 3050 EPA 6010 6010 MET Associated Lab Samples:9251579001, 9251579002, 9251579003 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:326832 Associated Lab Samples:9251579001, 9251579002, 9251579003 Matrix:Solid Analyzed Silver mg/kg ND 0.50 08/26/09 12:35 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 326833LABORATORY CONTROL SAMPLE: LCSSpike Silver mg/kg 26.725 107 80-120 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 326834MATRIX SPIKE SAMPLE: MSSpike Result 9251579001 Silver mg/kg 28.727.7 103 75-1250.033J Parameter Units Dup Result Max RPD QualifiersRPDResult 9251579002 326835SAMPLE DUPLICATE: Silver mg/kg 1.4 200.65J REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/28/2009 09:05 AM Page 6 of 7 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALIFIERS Pace Project No.: Project: 9251579 PCA Facility DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to changes in sample preparation, dilution of the sample aliquot, or moisture content. ND - Not Detected at or above adjusted reporting limit. J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. S - Surrogate 1,2-Diphenylhydrazine (8270 listed analyte) decomposes to Azobenzene. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. Pace Analytical is NELAP accredited. Contact your Pace PM for the current list of accredited analytes. U - Indicates the compound was analyzed for, but not detected. LABORATORIES Pace Analytical Services - AshevillePASI-A Pace Analytical Services - CharlottePASI-C REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/28/2009 09:05 AM Page 7 of 7 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 December 14, 2009 LIMS USE: FR - CHRIS KELLY LIMS OBJECT ID: 9257344 9257344 Project: Pace Project No.: RE: Mr. Chris Kelly Terracon 2020 Starita Rd Charlotte, NC FORMER PCA FACILITY Dear Mr. Kelly: Enclosed are the analytical results for sample(s) received by the laboratory on November 11, 2009. The results relate only to the samples included in this report. Results reported herein conform to the most current NELAC standards, where applicable, unless otherwise narrated in the body of the report. Inorganic Wet Chemistry and Metals analyses were performed at our Pace Asheville laboratory and Organic testing was performed at our Pace Huntersville laboratory unless otherwise footnoted. All Microbiological analyses were performed at the laboratory where the samples were received. If you have any questions concerning this report, please feel free to contact me. Sincerely, Kevin Herring kevin.herring@pacelabs.com Project Manager Enclosures cc:Mr. Chris Corbitt, Terracon REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 1 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 CERTIFICATIONS Pace Project No.: Project: 9257344 FORMER PCA FACILITY Charlotte Certification IDsConnecticut Certification #: PH-0104Florida/NELAP Certification #: E87627 9800 Kincey Ave. - Ste 100 Huntersville, NC 28078West Virginia Certification #: 357Virginia Certification #: 00213Tennessee Certification #: 04010South Carolina Drinking Water Cert. #: 990060003 South Carolina Certification #: 990060001 Pennsylvania Certification #: 68-00784North Carolina Wastewater Certification #: 12 North Carolina Field Services Certification #: 5342North Carolina Drinking Water Certification #: 37706New Jersey Certification #: NC012Louisiana/LELAP Certification #: 04034Kentucky UST Certification #: 84 Asheville Certification IDs Connecticut Certification #: PH-01062225 Riverside Dr. Asheville, NC 28804Virginia Certification #: 00072 Tennessee Certification #: 2980South Carolina Certification #: 99030001 South Carolina Bioassay Certification #: 99030002Pennsylvania Certification #: 68-03578North Carolina Wastewater Certification #: 40 North Carolina Drinking Water Certification #: 37712North Carolina Bioassay Certification #: 9New Jersey Certification #: NC011 Massachusetts Certification #: M-NC030Louisiana/LELAP Certification #: 03095 Florida/NELAP Certification #: E87648West Virginia Certification #: 356 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 2 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 SAMPLE ANALYTE COUNT Pace Project No.: Project: 9257344 FORMER PCA FACILITY Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 9257344001 0A 4-5 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344002 1B 3-4 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344003 2A 2-3 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344004 2B 2-3 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344005 3B 2-3 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344006 4A 5-6 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344007 5B 2-3 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF SM 4500-S2D 1 PASI-ALEP 9257344008 7A-A 3-4 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344009 8B 2-3 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344010 9A-A 2-3 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344011 9B 2-3 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344012 10A 3-4 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344013 10B 3-4 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344014 11B 5-6 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344015 12A 3-4 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344016 12B 3-4 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344017 13A 5-6 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344018 13A 9-10 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 3 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 SAMPLE ANALYTE COUNT Pace Project No.: Project: 9257344 FORMER PCA FACILITY Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 9257344019 13A 15-16 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF SM 4500-S2D 1 PASI-ALEP 9257344020 13B-A 4-5 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344021 13B-A 12-13 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344022 14A 6-7 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344023 14A 10-11 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344024 14A 15-16 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344025 14B 3-4 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344026 14B-A 5-6 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344027 OFFICE A 8-9 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344028 OFFICE A 12-13 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344029 OFFICE B 2-3 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344030 OFFICE B 6-7 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344031 OFFICE D 2-3 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF 9257344032 SUMP N-A 8-9 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CKDF REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 4 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257344 FORMER PCA FACILITY Sample:0A 4-5 Lab ID:9257344001 Collected:11/09/09 14:35 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 10 11/12/09 16:27 7440-22-411/12/09 11:003.8 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 23.5 %1 11/16/09 09:270.10 Sample:1B 3-4 Lab ID:9257344002 Collected:11/10/09 11:50 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 145 mg/kg 5 11/12/09 16:30 7440-22-411/12/09 11:002.0 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 30.2 %1 11/16/09 09:270.10 Sample:2A 2-3 Lab ID:9257344003 Collected:11/10/09 11:40 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 14:58 7440-22-411/12/09 11:000.36 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.6 %1 11/16/09 09:270.10 Sample:2B 2-3 Lab ID:9257344004 Collected:11/10/09 13:20 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 15:04 7440-22-411/12/09 11:000.40 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.1 %1 11/16/09 09:270.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 5 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257344 FORMER PCA FACILITY Sample:3B 2-3 Lab ID:9257344005 Collected:11/10/09 11:30 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 15:11 7440-22-411/12/09 11:000.39 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 20.5 %1 11/16/09 09:270.10 Sample:4A 5-6 Lab ID:9257344006 Collected:11/10/09 11:20 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 15:17 7440-22-411/12/09 11:000.48 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 28.2 %1 11/16/09 09:280.10 Sample:5B 2-3 Lab ID:9257344007 Collected:11/10/09 11:00 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 15:24 7440-22-411/12/09 11:000.54 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 30.4 %1 11/16/09 09:280.10 4500S2D Sulfide Soil Analytical Method: SM 4500-S2D Sulfide ND mg/L 1 12/11/09 13:29 H10.14 Sample:7A-A 3-4 Lab ID:9257344008 Collected:11/09/09 15:05 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 15:31 7440-22-411/12/09 11:000.56 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 26.1 %1 11/16/09 09:280.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 6 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257344 FORMER PCA FACILITY Sample:8B 2-3 Lab ID:9257344009 Collected:11/10/09 10:55 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 15:37 7440-22-411/12/09 11:000.57 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.5 %1 11/16/09 09:280.10 Sample:9A-A 2-3 Lab ID:9257344010 Collected:11/09/09 15:45 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 15:44 7440-22-411/12/09 11:000.41 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 22.9 %1 11/16/09 09:280.10 Sample:9B 2-3 Lab ID:9257344011 Collected:11/10/09 10:40 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 16:01 7440-22-411/12/09 11:000.48 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 19.9 %1 11/16/09 09:290.10 Sample:10A 3-4 Lab ID:9257344012 Collected:11/10/09 09:20 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 16:07 7440-22-411/12/09 11:000.52 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.9 %1 11/16/09 09:290.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 7 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257344 FORMER PCA FACILITY Sample:10B 3-4 Lab ID:9257344013 Collected:11/09/09 16:20 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 16:14 7440-22-411/12/09 11:000.53 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 22.3 %1 11/16/09 09:290.10 Sample:11B 5-6 Lab ID:9257344014 Collected:11/10/09 09:35 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/12/09 16:21 7440-22-411/12/09 11:000.38 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.7 %1 11/16/09 09:300.10 Sample:12A 3-4 Lab ID:9257344015 Collected:11/09/09 14:05 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 7.3 mg/kg 1 11/13/09 17:11 7440-22-411/12/09 16:000.52 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 16.4 %1 11/16/09 09:320.10 Sample:12B 3-4 Lab ID:9257344016 Collected:11/09/09 13:45 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 0.47 mg/kg 1 11/13/09 17:22 7440-22-411/12/09 16:000.47 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 17.6 %1 11/16/09 09:320.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 8 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257344 FORMER PCA FACILITY Sample:13A 5-6 Lab ID:9257344017 Collected:11/09/09 11:45 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 36.8 mg/kg 1 11/13/09 17:44 7440-22-411/12/09 16:000.53 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 18.0 %1 11/16/09 09:320.10 Sample:13A 9-10 Lab ID:9257344018 Collected:11/09/09 11:45 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 110 mg/kg 1 11/13/09 17:49 7440-22-411/12/09 16:000.80 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 39.7 %1 11/16/09 09:330.10 Sample:13A 15-16 Lab ID:9257344019 Collected:11/09/09 11:45 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 188 mg/kg 1 11/13/09 17:54 7440-22-411/12/09 16:000.56 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 33.9 %1 11/16/09 09:330.10 4500S2D Sulfide Soil Analytical Method: SM 4500-S2D Sulfide ND mg/L 1 12/11/09 13:29 H1,M00.15 Sample:13B-A 4-5 Lab ID:9257344020 Collected:11/09/09 12:20 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 2.1 mg/kg 1 11/13/09 18:00 7440-22-411/12/09 16:000.32 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 16.8 %1 11/16/09 09:330.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 9 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257344 FORMER PCA FACILITY Sample:13B-A 12-13 Lab ID:9257344021 Collected:11/09/09 12:20 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 4.9 mg/kg 1 11/13/09 18:06 7440-22-411/12/09 16:000.61 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 28.2 %1 11/16/09 09:330.10 Sample:14A 6-7 Lab ID:9257344022 Collected:11/09/09 10:10 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 68.9 mg/kg 1 11/13/09 18:11 7440-22-411/12/09 16:000.37 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.2 %1 11/16/09 09:330.10 Sample:14A 10-11 Lab ID:9257344023 Collected:11/09/09 10:10 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 171 mg/kg 1 11/13/09 18:17 7440-22-411/12/09 16:000.48 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 31.9 %1 11/16/09 09:330.10 Sample:14A 15-16 Lab ID:9257344024 Collected:11/09/09 10:10 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 134 mg/kg 1 11/13/09 18:23 7440-22-411/12/09 16:000.43 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 28.4 %1 11/16/09 09:340.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 10 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257344 FORMER PCA FACILITY Sample:14B 3-4 Lab ID:9257344025 Collected:11/09/09 11:00 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/13/09 18:29 7440-22-411/12/09 16:000.53 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 18.7 %1 11/16/09 09:340.10 Sample:14B-A 5-6 Lab ID:9257344026 Collected:11/10/09 10:05 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 24.6 mg/kg 1 11/13/09 18:35 7440-22-411/12/09 16:000.46 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 20.9 %1 11/16/09 09:340.10 Sample:OFFICE A 8-9 Lab ID:9257344027 Collected:11/09/09 09:30 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 4.2 mg/kg 1 11/13/09 18:51 7440-22-411/12/09 16:000.50 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 20.0 %1 11/16/09 09:340.10 Sample:OFFICE A 12-13 Lab ID:9257344028 Collected:11/09/09 09:30 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 9.7 mg/kg 1 11/13/09 18:56 7440-22-411/12/09 16:000.57 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 22.0 %1 11/16/09 09:340.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 11 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257344 FORMER PCA FACILITY Sample:OFFICE B 2-3 Lab ID:9257344029 Collected:11/09/09 11:25 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 1.0 mg/kg 1 11/13/09 19:01 7440-22-411/12/09 16:000.44 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 19.4 %1 11/16/09 09:350.10 Sample:OFFICE B 6-7 Lab ID:9257344030 Collected:11/09/09 11:25 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 129 mg/kg 1 11/13/09 19:07 7440-22-411/12/09 16:000.34 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 19.6 %1 11/16/09 09:350.10 Sample:OFFICE D 2-3 Lab ID:9257344031 Collected:11/10/09 13:50 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/13/09 19:13 7440-22-411/12/09 16:000.64 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.9 %1 11/16/09 09:350.10 Sample:SUMP N-A 8-9 Lab ID:9257344032 Collected:11/09/09 10:35 Received:11/11/09 17:25 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 8.0 mg/kg 1 11/13/09 19:19 7440-22-411/12/09 16:000.36 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 23.5 %1 11/16/09 09:350.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 12 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9257344 FORMER PCA FACILITY QC Batch: QC Batch Method: Analysis Method: Analysis Description: MPRP/5373 EPA 3050 EPA 6010 6010 MET Associated Lab Samples:9257344001, 9257344002, 9257344003, 9257344004, 9257344005, 9257344006, 9257344007, 9257344008, 9257344009, 9257344010, 9257344011, 9257344012, 9257344013, 9257344014 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:365305 Associated Lab Samples:9257344001, 9257344002, 9257344003, 9257344004, 9257344005, 9257344006, 9257344007, 9257344008, 9257344009, 9257344010, 9257344011, 9257344012, 9257344013, 9257344014 Matrix:Solid Analyzed Silver mg/kg ND 0.50 11/12/09 13:45 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 365306LABORATORY CONTROL SAMPLE: LCSSpike Silver mg/kg 26.025 104 80-120 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 365307MATRIX SPIKE SAMPLE: MSSpike Result 9257331001 Silver mg/kg 25.125.3 99 75-1250.17J Parameter Units Dup Result QualifiersRPDResult 9257237001 365308SAMPLE DUPLICATE: Silver mg/kg NDND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 13 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9257344 FORMER PCA FACILITY QC Batch: QC Batch Method: Analysis Method: Analysis Description: MPRP/5380 EPA 3050 EPA 6010 6010 MET Associated Lab Samples:9257344015, 9257344016, 9257344017, 9257344018, 9257344019, 9257344020, 9257344021, 9257344022, 9257344023, 9257344024, 9257344025, 9257344026, 9257344027, 9257344028, 9257344029, 9257344030, 9257344031, 9257344032 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:365504 Associated Lab Samples:9257344015, 9257344016, 9257344017, 9257344018, 9257344019, 9257344020, 9257344021, 9257344022, 9257344023, 9257344024, 9257344025, 9257344026, 9257344027, 9257344028, 9257344029, 9257344030, 9257344031, 9257344032 Matrix:Solid Analyzed Silver mg/kg ND 0.50 11/13/09 17:04 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 365505LABORATORY CONTROL SAMPLE: LCSSpike Silver mg/kg 25.325 101 80-120 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 365506MATRIX SPIKE SAMPLE: MSSpike Result 9257344015 Silver mg/kg 37.229.3 102 75-1257.3 Parameter Units Dup Result QualifiersRPDResult 9257344016 365507SAMPLE DUPLICATE: Silver mg/kg .26J0.47 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 14 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9257344 FORMER PCA FACILITY QC Batch: QC Batch Method: Analysis Method: Analysis Description: PMST/2879 ASTM D2974-87 ASTM D2974-87 Dry Weight/Percent Moisture Associated Lab Samples:9257344001, 9257344002, 9257344003, 9257344004, 9257344005, 9257344006, 9257344007, 9257344008, 9257344009, 9257344010, 9257344011, 9257344012, 9257344013, 9257344014 Parameter Units Dup Result QualifiersRPDResult 9257315001 366277SAMPLE DUPLICATE: Percent Moisture %16.2 1014.6 Parameter Units Dup Result QualifiersRPDResult 9257107002 366286SAMPLE DUPLICATE: Percent Moisture %22.7 022.7 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 15 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9257344 FORMER PCA FACILITY QC Batch: QC Batch Method: Analysis Method: Analysis Description: PMST/2880 ASTM D2974-87 ASTM D2974-87 Dry Weight/Percent Moisture Associated Lab Samples:9257344015, 9257344016, 9257344017, 9257344018, 9257344019, 9257344020, 9257344021, 9257344022, 9257344023, 9257344024, 9257344025, 9257344026, 9257344027, 9257344028, 9257344029, 9257344030, 9257344031, 9257344032 Parameter Units Dup Result QualifiersRPDResult 9257344015 366279SAMPLE DUPLICATE: Percent Moisture %16.6 116.4 Parameter Units Dup Result QualifiersRPDResult 9257307002 366280SAMPLE DUPLICATE: Percent Moisture %24.3 1327.6 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 16 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9257344 FORMER PCA FACILITY QC Batch: QC Batch Method: Analysis Method: Analysis Description: WET/10775 SM 4500-S2D SM 4500-S2D 4500S2D Sulfide Soil Associated Lab Samples:9257344007, 9257344019 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:377807 Associated Lab Samples:9257344007, 9257344019 Matrix:Water Analyzed Sulfide mg/L ND 0.10 12/11/09 13:29 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 377808LABORATORY CONTROL SAMPLE: LCSSpike Sulfide mg/L 0.48.5 96 90-110 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 377809MATRIX SPIKE SAMPLE: MSSpike Result 9257344019 Sulfide mg/L ND M0.76 17 75-125ND Parameter Units Dup Result QualifiersRPDResult 9257885015 377812SAMPLE DUPLICATE: Sulfide mg/L NDND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 17 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALIFIERS Pace Project No.: Project: 9257344 FORMER PCA FACILITY DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to changes in sample preparation, dilution of the sample aliquot, or moisture content. ND - Not Detected at or above adjusted reporting limit. J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. S - Surrogate 1,2-Diphenylhydrazine (8270 listed analyte) decomposes to Azobenzene. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. Pace Analytical is NELAP accredited. Contact your Pace PM for the current list of accredited analytes. U - Indicates the compound was analyzed for, but not detected. LABORATORIES Pace Analytical Services - AshevillePASI-A Pace Analytical Services - CharlottePASI-C ANALYTE QUALIFIERS Analysis conducted outside the EPA method holding time.H1 Matrix spike recovery and/or matrix spike duplicate recovery was outside laboratory control limits.M0 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:28 PM Page 18 of 18 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 December 14, 2009 LIMS USE: FR - CHRIS KELLY LIMS OBJECT ID: 9257885 9257885 Project: Pace Project No.: RE: Mr. Chris Kelly Terracon 2020 Starita Rd Charlotte, NC FORMER PCA FACILITY 71087772 Dear Mr. Kelly: Enclosed are the analytical results for sample(s) received by the laboratory on November 18, 2009. The results relate only to the samples included in this report. Results reported herein conform to the most current NELAC standards, where applicable, unless otherwise narrated in the body of the report. Inorganic Wet Chemistry and Metals analyses were performed at our Pace Asheville laboratory and Organic testing was performed at our Pace Huntersville laboratory unless otherwise footnoted. All Microbiological analyses were performed at the laboratory where the samples were received. If you have any questions concerning this report, please feel free to contact me. Sincerely, Kevin Herring kevin.herring@pacelabs.com Project Manager Enclosures cc:Mr. Chris Corbitt, Terracon REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 1 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 CERTIFICATIONS Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 Charlotte Certification IDsConnecticut Certification #: PH-0104Florida/NELAP Certification #: E87627 9800 Kincey Ave. - Ste 100 Huntersville, NC 28078West Virginia Certification #: 357Virginia Certification #: 00213Tennessee Certification #: 04010South Carolina Drinking Water Cert. #: 990060003 South Carolina Certification #: 990060001 Pennsylvania Certification #: 68-00784North Carolina Wastewater Certification #: 12 North Carolina Field Services Certification #: 5342North Carolina Drinking Water Certification #: 37706New Jersey Certification #: NC012Louisiana/LELAP Certification #: 04034Kentucky UST Certification #: 84 Asheville Certification IDs Connecticut Certification #: PH-01062225 Riverside Dr. Asheville, NC 28804Virginia Certification #: 00072 Tennessee Certification #: 2980South Carolina Certification #: 99030001 South Carolina Bioassay Certification #: 99030002Pennsylvania Certification #: 68-03578North Carolina Wastewater Certification #: 40 North Carolina Drinking Water Certification #: 37712North Carolina Bioassay Certification #: 9New Jersey Certification #: NC011 Massachusetts Certification #: M-NC030Louisiana/LELAP Certification #: 03095 Florida/NELAP Certification #: E87648West Virginia Certification #: 356 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 2 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 SAMPLE ANALYTE COUNT Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 9257885001 0A:0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885002 2A:0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885003 2B:0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885004 3B:0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885005 5B:0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885006 7A-A:0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885007 8B:0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885008 9A-A 0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885009 9B 0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885010 10A 0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885011 10B 9-10 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885012 11B 3-4 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885013 11B 7-8 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885014 12A 0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885015 12A 9-10 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA SM 4500-S2D 1 PASI-ALEP 9257885016 12B 0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885017 14B 0-1 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA 9257885018 14B 6-7 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 3 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 SAMPLE ANALYTE COUNT Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts SM 4500-S2D 1 PASI-ALEP 9257885019 14B-A 3-4 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA SM 4500-S2D 1 PASI-ALEP 9257885020 OFFICE D 6-7 EPA 6010 1 PASI-AJMW ASTM D2974-87 1 PASI-CJEA REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 4 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 Sample:0A:0-1 Lab ID:9257885001 Collected:11/09/09 14:35 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 156 mg/kg 1 11/24/09 22:04 7440-22-4 M011/24/09 08:500.70 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 29.5 %1 11/20/09 08:400.10 Sample:2A:0-1 Lab ID:9257885002 Collected:11/10/09 11:40 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/24/09 22:14 7440-22-411/24/09 08:500.64 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 23.4 %1 11/20/09 08:400.10 Sample:2B:0-1 Lab ID:9257885003 Collected:11/10/09 13:20 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/24/09 22:35 7440-22-411/24/09 08:500.54 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 20.9 %1 11/20/09 08:410.10 Sample:3B:0-1 Lab ID:9257885004 Collected:11/10/09 11:30 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/24/09 22:40 7440-22-411/24/09 08:500.39 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 26.3 %1 11/20/09 08:410.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:35 PM Page 5 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 Sample:5B:0-1 Lab ID:9257885005 Collected:11/10/09 11:00 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 0.76 mg/kg 1 11/24/09 22:46 7440-22-411/24/09 08:500.44 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 24.2 %1 11/20/09 08:410.10 Sample:7A-A:0-1 Lab ID:9257885006 Collected:11/09/09 15:05 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/24/09 22:51 7440-22-411/24/09 08:500.41 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 22.4 %1 11/20/09 08:420.10 Sample:8B:0-1 Lab ID:9257885007 Collected:11/10/09 10:55 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 1.5 mg/kg 1 11/24/09 22:57 7440-22-411/24/09 08:500.35 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 23.4 %1 11/20/09 08:420.10 Sample:9A-A 0-1 Lab ID:9257885008 Collected:11/09/09 15:45 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/24/09 23:03 7440-22-411/24/09 08:500.40 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 20.1 %1 11/20/09 08:420.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:35 PM Page 6 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 Sample:9B 0-1 Lab ID:9257885009 Collected:11/10/09 10:40 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/24/09 23:09 7440-22-411/24/09 08:500.46 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 22.0 %1 11/20/09 08:430.10 Sample:10A 0-1 Lab ID:9257885010 Collected:11/10/09 09:20 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 3.6 mg/kg 1 11/24/09 23:15 7440-22-411/24/09 08:500.56 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 23.5 %1 11/20/09 08:430.10 Sample:10B 9-10 Lab ID:9257885011 Collected:11/09/09 16:20 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/24/09 23:20 7440-22-411/24/09 08:500.51 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 27.6 %1 11/20/09 08:430.10 Sample:11B 3-4 Lab ID:9257885012 Collected:11/10/09 09:35 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 1.8 mg/kg 1 11/24/09 23:36 7440-22-411/24/09 08:500.54 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.3 %1 11/20/09 08:430.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:35 PM Page 7 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 Sample:11B 7-8 Lab ID:9257885013 Collected:11/10/09 09:35 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/24/09 23:42 7440-22-411/24/09 08:500.48 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.6 %1 11/20/09 08:440.10 Sample:12A 0-1 Lab ID:9257885014 Collected:11/09/09 14:05 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 1.4 mg/kg 1 11/24/09 23:47 7440-22-411/24/09 08:500.41 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 18.0 %1 11/20/09 08:440.10 Sample:12A 9-10 Lab ID:9257885015 Collected:11/09/09 14:05 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 3.7 mg/kg 1 11/24/09 23:53 7440-22-411/24/09 08:500.55 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 22.7 %1 11/20/09 08:440.10 4500S2D Sulfide Soil Analytical Method: SM 4500-S2D Sulfide ND mg/L 1 12/11/09 13:29 H30.13 Sample:12B 0-1 Lab ID:9257885016 Collected:11/09/09 13:45 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/24/09 23:58 7440-22-411/24/09 08:500.55 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 19.7 %1 11/20/09 08:440.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:35 PM Page 8 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 Sample:14B 0-1 Lab ID:9257885017 Collected:11/09/09 11:00 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 0.42 mg/kg 1 11/25/09 00:03 7440-22-411/24/09 08:500.41 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 19.6 %1 11/20/09 08:440.10 Sample:14B 6-7 Lab ID:9257885018 Collected:11/09/09 11:00 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 48.5 mg/kg 1 11/25/09 00:09 7440-22-411/24/09 08:500.45 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.2 %1 11/20/09 08:450.10 4500S2D Sulfide Soil Analytical Method: SM 4500-S2D Sulfide ND mg/L 1 12/11/09 13:29 H30.13 Sample:14B-A 3-4 Lab ID:9257885019 Collected:11/10/09 10:05 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver 237 mg/kg 1 11/25/09 00:14 7440-22-411/24/09 08:500.57 Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 19.3 %1 11/20/09 08:450.10 4500S2D Sulfide Soil Analytical Method: SM 4500-S2D Sulfide ND mg/L 1 12/11/09 13:29 H30.12 Sample:OFFICE D 6-7 Lab ID:9257885020 Collected:11/10/09 13:50 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050 Silver ND mg/kg 1 11/25/09 00:20 7440-22-411/24/09 08:500.40 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:35 PM Page 9 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 Sample:OFFICE D 6-7 Lab ID:9257885020 Collected:11/10/09 13:50 Received:11/18/09 19:00 Matrix:Solid Results reported on a "dry-weight" basis Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Percent Moisture Analytical Method: ASTM D2974-87 Percent Moisture 21.5 %1 11/20/09 08:460.10 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:35 PM Page 10 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 QC Batch: QC Batch Method: Analysis Method: Analysis Description: MPRP/5429 EPA 3050 EPA 6010 6010 MET Associated Lab Samples:9257885001, 9257885002, 9257885003, 9257885004, 9257885005, 9257885006, 9257885007, 9257885008, 9257885009, 9257885010, 9257885011, 9257885012, 9257885013, 9257885014, 9257885015, 9257885016, 9257885017, 9257885018, 9257885019, 9257885020 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:370512 Associated Lab Samples:9257885001, 9257885002, 9257885003, 9257885004, 9257885005, 9257885006, 9257885007, 9257885008, 9257885009, 9257885010, 9257885011, 9257885012, 9257885013, 9257885014, 9257885015, 9257885016, 9257885017, 9257885018, 9257885019, 9257885020 Matrix:Solid Analyzed Silver mg/kg ND 0.50 11/24/09 21:57 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 370513LABORATORY CONTROL SAMPLE: LCSSpike Silver mg/kg 24.325 97 80-120 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 370514MATRIX SPIKE SAMPLE: MSSpike Result 9257885001 Silver mg/kg 164 M034.8 21 75-125156 Parameter Units Dup Result QualifiersRPDResult 9257885002 370515SAMPLE DUPLICATE: Silver mg/kg .29JND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:35 PM Page 11 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 QC Batch: QC Batch Method: Analysis Method: Analysis Description: PMST/2892 ASTM D2974-87 ASTM D2974-87 Dry Weight/Percent Moisture Associated Lab Samples:9257885001, 9257885002, 9257885003, 9257885004, 9257885005, 9257885006, 9257885007, 9257885008, 9257885009, 9257885010, 9257885011, 9257885012, 9257885013, 9257885014, 9257885015, 9257885016, 9257885017, 9257885018, 9257885019, 9257885020 Parameter Units Dup Result QualifiersRPDResult 9257885001 368852SAMPLE DUPLICATE: Percent Moisture %29.3 129.5 Parameter Units Dup Result QualifiersRPDResult 9257885020 368853SAMPLE DUPLICATE: Percent Moisture %21.3 121.5 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:35 PM Page 12 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 QC Batch: QC Batch Method: Analysis Method: Analysis Description: WET/10775 SM 4500-S2D SM 4500-S2D 4500S2D Sulfide Soil Associated Lab Samples:9257885015, 9257885018, 9257885019 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:377807 Associated Lab Samples:9257885015, 9257885018, 9257885019 Matrix:Water Analyzed Sulfide mg/L ND 0.10 12/11/09 13:29 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 377808LABORATORY CONTROL SAMPLE: LCSSpike Sulfide mg/L 0.48.5 96 90-110 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 377809MATRIX SPIKE SAMPLE: MSSpike Result 9257344019 Sulfide mg/L ND M0.76 17 75-125ND Parameter Units Dup Result QualifiersRPDResult 9257885015 377812SAMPLE DUPLICATE: Sulfide mg/L NDND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:35 PM Page 13 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALIFIERS Pace Project No.: Project: 9257885 FORMER PCA FACILITY 71087772 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to changes in sample preparation, dilution of the sample aliquot, or moisture content. ND - Not Detected at or above adjusted reporting limit. J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. S - Surrogate 1,2-Diphenylhydrazine (8270 listed analyte) decomposes to Azobenzene. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. Pace Analytical is NELAP accredited. Contact your Pace PM for the current list of accredited analytes. U - Indicates the compound was analyzed for, but not detected. LABORATORIES Pace Analytical Services - AshevillePASI-A Pace Analytical Services - CharlottePASI-C ANALYTE QUALIFIERS Sample was received outside EPA method holding time.H3 Matrix spike recovery and/or matrix spike duplicate recovery was outside laboratory control limits.M0 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 12/14/2009 03:35 PM Page 14 of 14 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 March 15, 2010 LIMS USE: FR - CHRIS KELLY LIMS OBJECT ID: 9264532 9264532 Project: Pace Project No.: RE: Mr. Chris Kelly Terracon 2020 Starita Rd Charlotte, NC FORMER PCA FACILITY 71087772 Dear Mr. Kelly: Enclosed are the analytical results for sample(s) received by the laboratory on March 03, 2010. The results relate only to the samples included in this report. Results reported herein conform to the most current NELAC standards, where applicable, unless otherwise narrated in the body of the report. Inorganic Wet Chemistry and Metals analyses were performed at our Pace Asheville laboratory and Organic testing was performed at our Pace Huntersville laboratory unless otherwise footnoted. All Microbiological analyses were performed at the laboratory where the samples were received. If you have any questions concerning this report, please feel free to contact me. Sincerely, Kevin Herring kevin.herring@pacelabs.com Project Manager Enclosures cc:Mr. Chris Corbitt, Terracon REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 1 of 6 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 CERTIFICATIONS Pace Project No.: Project: 9264532 FORMER PCA FACILITY 71087772 Asheville Certification IDsConnecticut Certification #: PH-01062225 Riverside Dr. Asheville, NC 28804 Louisiana/LELAP Certification #: 03095Massachusetts Certification #: M-NC030New Jersey Certification #: NC011North Carolina Bioassay Certification #: 9North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 Pennsylvania Certification #: 68-03578South Carolina Bioassay Certification #: 99030002 South Carolina Certification #: 99030001Tennessee Certification #: 2980Virginia Certification #: 00072West Virginia Certification #: 356Florida/NELAP Certification #: E87648 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 2 of 6 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 SAMPLE ANALYTE COUNT Pace Project No.: Project: 9264532 FORMER PCA FACILITY 71087772 Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 9264532001 MW-1 EPA 6010 1 PASI-AEWS 9264532002 MW-2 EPA 6010 1 PASI-AEWS 9264532003 MW-3 EPA 6010 1 PASI-AEWS REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Page 3 of 6 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 ANALYTICAL RESULTS Pace Project No.: Project: 9264532 FORMER PCA FACILITY 71087772 Sample:MW-1 Lab ID:9264532001 Collected:03/03/10 13:05 Received:03/03/10 17:20 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP, 3030C Analytical Method: EPA 6010 Preparation Method: SM 3030C Silver ND ug/L 1 03/11/10 19:23 7440-22-403/05/10 12:495.0 Sample:MW-2 Lab ID:9264532002 Collected:03/03/10 14:20 Received:03/03/10 17:20 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP, 3030C Analytical Method: EPA 6010 Preparation Method: SM 3030C Silver ND ug/L 1 03/11/10 19:30 7440-22-403/05/10 12:495.0 Sample:MW-3 Lab ID:9264532003 Collected:03/03/10 14:30 Received:03/03/10 17:20 Matrix:Water Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit 6010 MET ICP, 3030C Analytical Method: EPA 6010 Preparation Method: SM 3030C Silver ND ug/L 1 03/11/10 19:46 7440-22-403/05/10 12:495.0 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 03/15/2010 09:22 AM Page 4 of 6 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALITY CONTROL DATA Pace Project No.: Project: 9264532 FORMER PCA FACILITY 71087772 QC Batch: QC Batch Method: Analysis Method: Analysis Description: MPRP/5924 SM 3030C EPA 6010 6010 MET 3030C Associated Lab Samples:9264532001, 9264532002, 9264532003 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:411226 Associated Lab Samples:9264532001, 9264532002, 9264532003 Matrix:Water Analyzed Silver ug/L ND 5.0 03/11/10 19:17 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 411227LABORATORY CONTROL SAMPLE: LCSSpike Silver ug/L 266250 106 80-120 Parameter Units MS Result % Rec Limits Qualifiers% RecConc. 411228MATRIX SPIKE SAMPLE: MSSpike Result 9264532001 Silver ug/L 267250 107 75-125ND Parameter Units Dup Result QualifiersRPDResult 9264532002 411229SAMPLE DUPLICATE: Silver ug/L NDND REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 03/15/2010 09:22 AM Page 5 of 6 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 QUALIFIERS Pace Project No.: Project: 9264532 FORMER PCA FACILITY 71087772 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to changes in sample preparation, dilution of the sample aliquot, or moisture content. ND - Not Detected at or above adjusted reporting limit. J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. S - Surrogate 1,2-Diphenylhydrazine (8270 listed analyte) decomposes to Azobenzene. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. Pace Analytical is NELAP accredited. Contact your Pace PM for the current list of accredited analytes. U - Indicates the compound was analyzed for, but not detected. LABORATORIES Pace Analytical Services - AshevillePASI-A REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 03/15/2010 09:22 AM Page 6 of 6 Pace Analytical Services, Inc. 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Pace Analytical Services, Inc. 2225 Riverside Dr. Asheville, NC 28804 (828)254-7176 Appendix D Appendix E North Carolina Department of Environment and Natural Resources Division of Waste Management Beverly Eaves Perdue Dexter R. Matthews Dee Freeman Governor Director Secretary PO Box 384, Lake Lure, North Carolina 28746 Phone\ FAX: 828-625-0171 \ Internet: Roberta.Proctor@ncdenr.gov An Equal Opportunity / Affirmative Action Employer - 50 % Recycled \ 10 % Post Consumer Paper July 29, 2009 Chris Kelly Terracon Consultants 2020 Starita Road, Suite E Charlotte, North Carolina 28206 Re: Initial Site Sampling Plant/ Assessment and Clean-up Plan Former PCA facility, Matthews, NC. Dear Mr. Kelly: I have reviewed the ISSP/ ACP submitted on behalf of your client, CPI Corporation, for the assessment and remediation of the site referenced above. Please address the following comments either electronically or by US mail. 1. Please supply a diagram showing the location of the soil samples/ borings and other figures that are a part of, or referenced by, this plan. 2. The NC HWS Generator Closure Guidelines requires a minimum of five samples to determine background levels of metals. 3. Please show on the diagram the location of the background samples and the justification for using those location(s). Also include the additional background sample locations required and the justification for their location. 4. Please include all Appendices attached to, or referenced by, this plan. 5. To obtain a “clean closure” or “no further action” letter, the site must be cleaned up to the NC Hazardous Waste Section Soil Screening Levels, not industrial levels. 6. Please describe why silver is the only constituent of concern at this site. Include a site use history. 7. Ensure that all personnel who are conducting remedial activities are trained to the OSHA 1919.120 standard. 8. Excavated soil must be sampled after excavation for waste determination (TCLP analysis). Waste determination cannot be made on the in situ, previously collected samples. 9. If the confirmation samples collected at the bottom of the excavation(s) have silver levels below the NCHWS SSL and there are no other constituents of concern, then groundwater sampling will not be necessary. 10. The post-excavation samples must be collected at least every 20 feet along the bottom and each sidewall of the excavation(s). If you have any questions, please contact me at the number listed below. Sincerely, Roberta Proctor, Environmental Chemist Hazardous Waste Section Cc: Brent Burch Mark Burnette Central Files Former PCA 7-29-09 Page 2 Appendix F Table of Contents 1.0 Introduction....................................................................................................... 1 2.0 Background....................................................................................................... 1 3.0 Field Activities................................................................................................... 2 3.1 Tile Samples........................................................................................................ 2 3.2 Setting Bed Samples........................................................................................... 2 3.3 Liner Samples ..................................................................................................... 2 3.4 Background Samples .......................................................................................... 3 3.5 Laboratory Analysis............................................................................................ 3 4.0 Air Monitoring.................................................................................................. 3 4.1 Procedures........................................................................................................... 3 4.2 Results................................................................................................................. 4 5.0 Decontamination and Waste Disposal............................................................. 5 6.0 Tile, Setting Bed and Liner Analytical Results.............................................. 5 6.1 Tile Samples........................................................................................................ 5 6.2 Setting Bed Samples........................................................................................... 5 6.3 Liner Samples ..................................................................................................... 6 7.0 Conclusions........................................................................................................ 6 7.1 Vapor Monitoring ............................................................................................... 6 7.2 Tile, Setting Bed and Liner Disposal.................................................................. 6 8.0 Recomendations................................................................................................ 6 8.1 During Material Removal................................................................................... 6 8.2 Waste Disposal.................................................................................................... 7 8.3 Post-Removal Concrete Condition Evaluation................................................... 7 Tables 1 Air Monitoring Results – Metals 2 Air Monitoring Results – Ammonia 3 Air Monitoring Results – Hydrogen Sulfide 4 Air Monitoring Results – Hydrogen Cyanide 5 Air Monitoring Results – Formaldehyde 6 Tile, Bedding and Liner Sampling Results Figures 1 Site Location Map 2a Lower Level Sample Location Plan 2b Upper Level Sample Location Plan Appendices I Laboratory Analytical Results of Air Monitoring II Laboratory Analytical Results of Tile, Bedding and Liner Samples Environmental Sampling Report Former PCA Facility 815 Matthews-Mint Hill Road Matthews, North Carolina S&ME Project No. 1354-09-016 April 1, 2009 1.0 INTRODUCTION On February 4, 2009, Ms. Touchette with CPI and Mr. Haytham Kasem with S&ME met at the former PCA facility in Matthews, North Carolina regarding the planned removal and disposal of liner, tile and underlying tile setting bed located within two floor levels of the on-site buildings. The location of the facility is indicated on Figure 1. Mr. Neal McElveen and Mr. Mike Cashio with S&ME visited the facility on February 5, 2009 to tour the area with the liner, tile and setting bed to be removed. The purpose of the sampling was to 1) evaluate options for the disposal of the tile, setting bed, and liner material and 2) evaluate potential exposure of chemicals likely to be present in the tile and setting bed, during both the sampling and removal of the tile and setting bed. 2.0 BACKGROUND The tile is a red-brown quarry tile approximately 6-inches square. The tile is underlain by approximately 4 inches of cement/sand material. In addition, approximately 50% of the lower floor area is covered with a Rhino rubber liner, portions of which have no underlying tile. The liner, tile, and bedding material are located in areas of chemical storage and use in film processing. The upper floor drains to centrally located floor drains which are piped to the lower floor. The lower floor drains to a trench system that flows to a pretreatment system. Possible chemicals that could be present include silver, cadmium, chromium, lead, cyanide, ammonia, (from ammonium thiosulfate), sulfides, hydrogen sulfide, and formaldehyde. However, the use of liquids or material with cyanides could not be ruled out based on lack of information of past operations. Based on a February 18, 2009 site meeting with Mr. Ted Hellmann and others with CPI Corp, Mr. McElveen and Mr. Al Quarles with S&ME, and Mr. Malcolm Whitley with Concord Industrial Services Company, Inc., an extra area of the lower floor currently occupied by office space was discovered to have been previously part of the lower floor processing area. CPI Corp. personnel had uncovered the carpet VTI tile in several areas exposing the same quarry tile as in the processing area and two concrete-filled trenches that connect to the trenches in the current processing area. Thus, Mr. Hellmann requested that this area and the adjacent piping chase area be included in the sampling plan. We understand that a sample of the setting bed material was collected by CPI personnel on January 7, 2009 and analyzed for the eight RCRA metals following TCLP Extraction and for total sulfide. The concentrations of the RCRA metals were not above hazardous waste limits. Sulfide was not detected above the laboratory method detection limit of 10 milligrams per kilogram. Environmental Sampling Report S&ME Project No. 1354-09-016 Former PCA Facility, Matthews, North Carolina April 1, 2009 2 3.0 FIELD ACTIVITIES The following field activities were performed on February 25, 2009 during the sample collection: • S&ME collected samples composite of the tile, setting bed, and liner from Areas A through F from the chemical mixing rooms on the upper and lower floors of the building, as indicated on the attached Figures 2a, and 2b. Lower and Upper Sample Location Plans. The tile and setting bed at each location were uncovered and removed by an S&ME employee using an electric jack hammer. In addition, background samples of tile and underlying concrete were collected in the upper floor shipping/receiving room. • The floor areas were divided into six areas. Samples of the tile, setting bed and liner (if present) were collected from five to six locations within each area. The five to six samples of each material type from each area were composited to form one laboratory sample per type per area. The setting bed samples were composited at the site. The tile and liner samples were returned to S&ME’s office and were crushed or cut with pre-cleaned equipment. • During sample collection, two large fans were provided by CPI personnel that moved air across the sampling areas. No apparent dust was generated during the sampling activities. 3.1 Tile Samples At each Area S&ME removed two tiles for access to the underlying setting bed material. Tile from each of the six locations within each area was placed in a plastic sealable bag and labeled with the area of collection. The tile from each area was crushed at S&ME’s office using material testing equipment and mixed to form one laboratory sample per area. From the mixed sample, the laboratory containers were filled and placed on ice prior to transport to the laboratory. 3.2 Setting Bed Samples After removing the tile, S&ME removed and collected a sample of the setting bed material to a depth of ~3 to 4 inches (without penetrating the underlying concrete floor). The samples from each area were placed in a stainless steel bowl and mixed. From the mixed sample, the laboratory containers were filled on site, and placed on ice prior to transport to the laboratory. 3.3 Liner Samples Samples of the Rhino rubber liner were composited from two areas (B and C) in the lower floor area, for laboratory analysis. The samples were cut into small pieces with tin snips, and placed in a plastic bag and mixed by shaking and rotating the bag. From the mixed sample, the laboratory containers were filled and placed on ice prior to transport to the laboratory. Environmental Sampling Report S&ME Project No. 1354-09-016 Former PCA Facility, Matthews, North Carolina April 1, 2009 3 3.4 Background Samples One additional sample of the tile and setting bed material was be collected in the shipping/receiving area, a location not reported to have used chemicals, for the purposes of a background or baseline sample. Note that the material underlying the tile was concrete and not bedding material as was encountered in the processing areas. 3.5 Laboratory Analysis S&ME submitted the samples to Pace Analytical Services Inc., of Huntersville, North Carolina a state-certified laboratory for the analysis of the following parameters, as would be required for disposal acceptance by the Allied Waste into their Subtitle D landfill in Concord, North Carolina: • Total RCRA Metals (arsenic, barium, cadmium, chromium, lead, mercury, selenium, and silver). • Reactivity (Sulfide and Cyanide) • Corrosivity (aka: pH) • Ignitability (aka: flashpoint) • TCLP-silver (selected samples with total silver concentrations greater than 20 times the hazardous waste limits. 4.0 AIR MONITORING During the February 25, 2009 collection of the tile, bedding material and liner samples, S&ME collected samples of the breathing zone using various sampling methods to evaluate potential exposure to S&ME employees from contaminants potentially present in the sampling media. The contaminants selected for monitoring were based on information provided by CPI Corp. The locations of the samples are described in Tables 1 through 5 and are depicted on Figures 2A and 2B. The sampling included the following contaminants: • Lead • Cadmium • Soluble Barium • Chromium • Silver • Ammonia • Hydrogen Sulfide • Formaldehyde • Hydrogen Cyanide 4.1 Procedures 4.1.1 Lead, Cadmium, Chromium, and Silver One sample was collected from an S&ME employee’ breathing zone while operating a jackhammer during environmental sampling activities and one sample was collected from an S&ME employee’s breathing zone while collecting tile, setting bed, and liner samples. Environmental Sampling Report S&ME Project No. 1354-09-016 Former PCA Facility, Matthews, North Carolina April 1, 2009 4 Air sampling pumps were calibrated to a flow rate of 2.0 liters per minute before and after the sampling event with suitable media (37 mm mixed cellulose ester filters in polystyrene cassettes) inline. 4.1.2 Soluble Barium One sample was collected from an S&ME employee’ breathing zone while operating a jackhammer during environmental sampling activities. The air sampling pump was calibrated to a flow rate of 2.0 liters per minute before and after the sampling event with suitable media (37 mm mixed cellulose ester filters in polystyrene cassettes) inline. 4.1.3 Silver Since multiple metals analysis frequently produces a low-biased result for silver, an additional sample was submitted for a separate silver (only) analysis. One sample was collected from an S&ME employee’s breathing zone while collecting tile, setting bed, and liner samples. The air sampling pump was calibrated to a flow rate of 2.0 liters per minute before and after the sampling event with suitable media (37 mm mixed cellulose ester filters in polystyrene cassettes) inline. Personnel air monitoring samples and corresponding blanks were then submitted under proper chain of custody to Galson Laboratories (Galson) in East Syracuse, New York for analysis. Galson is accredited in industrial hygiene analysis by the American Industrial Hygiene Association. 4.1.4 Ammonia, Hydrogen Sulfide, Hydrogen Cyanide, and Formaldehyde, Up to 14 samples were collected for each contaminant during initial flooring disturbance, sample collection, and subsequent tile crushing using Gastec detector tubes and a piston pump. Each sample was collected near breathing zone level. 4.2 Results Results of the analyses and detector tube readings are summarized in the Tables 1 through 5. Metals: The results of the metal analyses are summarized in Table 1. Silver was the only metal detected above laboratory method detection limits, with concentrations ranging from 0.0022 to 0.0031 milligrams per cubic meter (mg/m3). The North Carolina Occupational Safety and Health Administration (NC OSHA) Permissible Exposure Level (PEL) over an 8-hour Time Weighted Average (TWA) is 0.01 mg/m3. Ammonia: The results of the ammonia analyses are summarized in Table 2. Ammonia was detected at a concentration of 1 ppm in two samples: during the collection of samples in area E (sample E3) and during the preparation of the tile sample Tile-D. The NC OSHA PEL over an 8-hour TWA is 50 parts per million. Hydrogen Sulfide and Hydrogen Cyanide: The results of the hydrogen sulfide and hydrogen cyanide are summarized in Tables 3 and 4, respectively. These contaminants were not detected. Environmental Sampling Report S&ME Project No. 1354-09-016 Former PCA Facility, Matthews, North Carolina April 1, 2009 5 Formaldehyde: The results of the formaldehyde analyses are summarized in Table 5. Elevated levels of formaldehyde (0.2 ppm to 0.5 ppm) were detected during detector tube sampling. The NC OSHA levels as 8-hour TWAs are as follows: Action Level of 0.5 ppm as an 8-hour TWA; PEL of 0.75 ppm as an 8-hour TWA; and Short Term Exposure Limit (STEL) of 2 ppm as a 15-minute short-term exposure. S&ME staff members were instructed to stop work and wait outdoors until such levels dissipated. The area was later reevaluated and no detectible levels of formaldehyde were found to be present. S&ME personnel returned to work and completed the shift without further incident. 5.0 DECONTAMINATION AND WASTE DISPOSAL The sampling tools were cleaned prior to and following the collection of each composite sample by type using potable water, liquinox/water mixture and deionized water. New disposable nitrile gloves were used between each composite sample collection. The gloves, paper towels and excess tile and liner sample were placed in a plastic trash bag for later disposal with the tile, setting bed and liner material. 6.0 TILE, SETTING BED AND LINER ANALYTICAL RESULTS As a “rule of thumb,” total metal concentrations in units of milligrams per kilogram (mg/kg) greater than 20 times the hazardous waste limits of leachable metals in units of milligrams per liter (mg/L), would be considered indicative of hazardous waste, unless the samples are also analyzed for actual leachable metal concentrations using the Toxicity Characteristic Leaching Procedure (TCLP). 6.1 Tile Samples Laboratory analytical results of the tile samples did not indicate the presence of metals in excess of 20 times the hazardous waste limits. Analysis of the samples for pH, Reactive Sulfide, Reactive Cyanide, and Flashpoint found these to be below hazardous limits for the purpose of disposal. Table 6 summarizes the analytical results of the tile samples. 6.2 Setting Bed Samples Samples obtained from the tile setting bed for sample areas B, C, and D were found to contain total silver at concentrations over the “20 times hazardous waste limit” value of 100 mg/kg. The samples were reported to contain 136 mg/kg for sample Bedding-B, 171 mg/kg for sample Bedding-C, and 223 mg/kg for sample Bedding-D. These samples were subsequently analyzed for leachable silver using TCLP, with results ranging from 0.15 to 0.23 mg/L, compared to the hazardous waste limit of 5 mg/kg. Analysis of the samples for pH, Reactive Sulfide, Reactive Cyanide, and Flashpoint found these to be below hazardous limits for the purpose of disposal. Table 6 summarizes the analytical results of the tile samples. Environmental Sampling Report S&ME Project No. 1354-09-016 Former PCA Facility, Matthews, North Carolina April 1, 2009 6 6.3 Liner Samples Laboratory analytical results of the Liner samples indicated the presence of silver at a concentration in excess of the “20 times hazardous waste limit” value in sample Liner B (332 mg/kg). This sample was subsequently analyzed for leachable silver using TCLP, with a resulting concentration of 0.11 mg/kg, compared to the hazardous waste limit of 5 mg/L. Analysis of the samples for pH, Reactive Sulfide, Reactive Cyanide, and Flashpoint found these to be below hazardous limits for the purpose of disposal. Table 6 summarizes the analytical results of the tile samples. 7.0 CONCLUSIONS 7.1 Vapor Monitoring Personnel air sampling results did not indicate exposures above the NC OSHA PELs. Silver and formaldehyde were the only contaminants detected during the collection of the tile, setting bed and liner samples. Formaldehyde was detected at the NC OSHA Action Level of 0.5 ppm in one sample. The construction activities during the removal of the tile, setting bed and liner material from the upper and lower process areas are likely to be more aggressive than the sampling activities. Thus there is a potential that the contaminants of concern may be released into the breathing zone at higher concentrations that those detected during sampling activities, and concentrations may exceed the NC OSHA PELs. 7.2 Tile, Setting Bed and Liner Disposal The results of the tile, setting bed and liner sampling and analysis were below hazardous waste limits. Thus, the material may be disposed as a non-hazardous special waste, at a permitted facility such as the BFI Landfill in Concord, North Carolina. 8.0 RECOMENDATIONS 8.1 During Material Removal We understand that CPI plans to remove the tile, setting bed material and liner and dispose of these materials off-site. S&ME anticipates that the removal activities would be more aggressive than the sampling activities that could result in a greater emission of volatiles and the generation of dust, with the potential for higher concentrations of contaminants in the breathing zone than those detected during the sampling activities. Based on S&ME’s air and material sampling results and the possible contaminants present in the materials, we recommend the following actions during the removal of the tile, setting bed and liner materials: 1. Air monitoring of the breathing zone and workers to document potential or actual exposure levels compared to action levels, PELs or STELs. Since silver and the other metals are tested by laboratory methods, the exposure of workers above PELs would not be evident until after exposure has occurred. Thus, engineering Environmental Sampling Report S&ME Project No. 1354-09-016 Former PCA Facility, Matthews, North Carolina April 1, 2009 7 controls as recommended below, would reduce the potential for exposure of these non-volatile contaminants during the removal activities. 2. Additional ventilation of the working areas during material removal and handling activities. Such ventilation may consist of additional fans moving outside air into the working area and moving inside air to the outside. 3. Moisture controls to reduce or eliminate the generation of dust. Such controls may include wetting the material during removal or using misting fans. 8.2 Waste Disposal S&ME recommends submitting the laboratory reports and a waste profile to Allied Waste for their approval for the disposal of the waste at their subtitle D BFI Landfill located in Concord, North Carolina. 8.3 Post-Removal Concrete Condition Evaluation Following removal of the tile, liner and bedding material, S&ME recommends a visual evaluation of the integrity of the underlying concrete floor. Based on the evaluation results, sampling of the concrete and possibly the soil beneath the concrete may be recommended. Tables Table 1Summary of Sampling ResultsEnvironmental SamplingFormer PCA Facility815 Matthews-Mint Hill RoadMatthews, Mecklenburg County, North CarolinaEPAEPAEPAEPAEAPSW60107471 9045 733C 735S 1010Sample LocationDateCollected(mm/dd/yy)Tile A2/25/2009 4.2 153 <0.11 45.2 5.3 <1.1 7.2 --- 0.0053 12.0 <1.0 <10 >140Bedding A2/25/2009 4.4 24 <0.094 11 1.1 1.2 2.1 --- 0.0098 12.1 <1.0 <10.1 >140Tile B2/25/2009 3.2 269 2.4 49.6 8.3 <0.76 34 --- 0.025 11.9 <1.0 <10 >140Bedding B2/25/2009 4 22.8 <0.096 10.7 1.4 <0.961360.15 0.043 11.9 <1.0 <10 >140Liner B2/25/2009 0.44 2.6 0.69 54 0.9 <0.763320.11 0.018 8.5 <0.99 <9.9 >140Tile C2/25/2009 4.3 41.9 0.3 12.2 0.81 <1.1 95.2 --- 0.008 10.9 <0.98 <9.8 >140Bedding C2/25/2009 6.1 37.5 0.26 16.2 2.3 1.61710.23 0.021 12.2 <0.99 <9.9 >140Liner C2/25/2009 <0.36 33.8 <0.072 0.53 <0.36 <0.72 62.3 --- 0.017 10.1 <0.99 <9.9 >140Tile D2/25/2009 1.4 16.1 1.1 3.4 0.89 0.58 27.3 --- 0.014 11.7 <1.0 <10 >140Bedding D2/25/2009 4.1 19.1 12.1 12.3 2.8 1.22230.22 0.033 12.1 <1.0 <10 >140Tile E2/25/2009 3.2 30.2 <0.089 3.7 0.79 <0.89 28.4 --- 0.021 11.9 <0.99 <9.9 >140Bedding E2/25/2009 3.8 19.3 <0.090 10.3 1.1 1 20.8 --- 0.042 12.0 <0.99 <9.9 >140Tile F2/25/2009 3.6 107 <0.099 5 2.3 <0.99 12.5 --- 0.011 11.8 <1.0 <10 >140Bedding F2/25/2009 3.4 16.2 <0.11 8.7 1.3 <1.1 97.8 --- 0.021 11.0 <1.0 <10 >140Background Tile2/25/2009 2.8 92.7 <0.10 6.4 1.3 <1.0 10.3 --- 0.071 11.5 <0.99 <9.9 >140Background Bedding2/25/2009 6.3 88.1 0.15 12.1 4.4 1.5 18.1 --- 0.2 12.1 <0.99 <9.9 >140Maximum Detected6.3 269 12.1 54 8.3 1.6 332 --- 0.2 12.2 <1.0 <10.1 >140Hazardous Waste Limit (mg/L)NA NA NA NA NA NA NA 5 NA≤2 or≥12.5NA NA <140Hazardous Waste Limit X 20100 2,000 20 100 100 20100NA 4 NANANANANotes:Values reported in milligams per kilogram, unless otherwise noted3/13/2009Pending - Analysis is pending--- : Not AnalyzedValueExceeds 20X Hazardous Waste Limit N/A : Not ApplicableSilver (Total)Analytical Method >>Contamiant of Concern >>ArsenicBariumReactiveSulfideReactiveCyanideFlash Point(°F)CadmiumpH(Standard Units)MercurySilver (TCLP)(mg/L)ChromiumLeadSelenium Table 2 Air Monitoring Results - Ammonia Former PCA Facility 815 Matthews-Mint Hill Road Matthews, Mecklenburg County, North Carolina S&ME Project No. 1354-09-016 Sample Result No. (ppm) 2-25-09/10:40/ Upper Level NH3 -1 1 2-25-09/10:44/ Upper Level NH3 - 2 None Detected 2-25-09/12:04/ Lower Level NH3 - 3 None Detected 2-25-09/12:07/ Lower Level NH3 - 4 None Detected 2-25-09/14:23/ Lower Level NH3 - 5 None Detected 2-25-09/14:59/ Lower Level NH3 - 6 None Detected 2-25-09/15:18/ Upper Level NH3 - 7 None Detected 2-25-09/15:45/ Lower Level NH3 - 8 None Detected 2-25-09/16:35/ Upper Level NH3 - 9 None Detected 2-26-09/13:30/ Indoors (S&ME Office)NH3 - 10 None Detected 2-26-09/13:57/ Outdoors (S&ME Office)NH3 - 11 None Detected 2-26-09/14:17/ Outdoors (S&ME Office)NH3 - 12 1 2-26-09/14:50/ Indoors (S&ME Office)NH3 - 13 None Detected 2-26-09/15:21/ Indoors (S&ME Office)NH3 - 14 None Detected Note: NC OSHA PEL is 50 parts per million ppm = parts per million parts (of air) Samples Collected on February 25 and 26, 2009 using Draeger Tubes Tile Crushing with Grinder/ D Sample Material Tile Crushing with Grinder/ A Sample Material Activity/Sample Location (Activity Location or Material Source Location) Sample Date/Time/ Area Flooring Materials Sampling/Various (During Clean-up) Manual Tile Crushing/ Background Material Manual Tile Crushing/ F Sample Material Manual Tile Crushing/ D Sample Material Flooring Materials Sampling/Location B3 Flooring Materials Sampling/Location C5 Initial Flooring Disturbance (Jack Hammer)/Background Location Flooring Materials Sampling/Mixing Station Flooring Materials Sampling/Location E3 Initial Flooring Disturbance (Jack Hammer)/Location E5 Flooring Materials Sampling/Location A1 Initial Flooring Disturbance (Jack Hammer)/Location A5 Table 3 Air Monitoring Results - Hydrogen Sulfide Former PCA Facility 815 Matthews-Mint Hill Road Matthews, Mecklenburg County, North Carolina S&ME Project No. 1354-09-016 Sample Date/Time/ Area Activity/Sample Location (Activity Location or Material Source Location) Sample No. Result (ppm) 2-25-09/10:48/ Upper Level H2S - 1 None Detected 2-25-09/11:03/ Upper Level H2S -2 None Detected 2-25-09/14:02/ Lower Level H2S - 3 None Detected 2-25-09/14:03/ Lower Level H2S - 4 None Detected 2-25-09/14:35/ Lower Level H2S - 5 None Detected 2-25-09/14:57/ Lower Level H2S - 6 None Detected 2-25-09/15:15/ Upper Level H2S - 7 None Detected 2-25-09/16:28/ Upper Level H2S - 8 None Detected 2-25-09/15:45/ Upper Level H2S - 9 None Detected 2-26-09/13:20/ Indoors (S&ME Office)H2S - 10 None Detected 2-26-09/14:03/ Outdoors (S&ME Office)H2S - 11 None Detected 2-26-09/14:15/ Outdoors (S&ME Office)H2S - 12 2-26-09/14:55/ Indoors (S&ME Office)H2S - 13 None Detected Note: ppm = parts per million parts (of air) Samples Collected on February 25 and 26, 2009 using Draeger Tubes Initial Flooring Disturbance (Jack Hammer)/Location E3 Flooring Materials Sampling/ Location E5 Initial Flooring Disturbance (Jack Hammer)/Location B3 Flooring Materials Sampling/ Location B1 Flooring Materials Sampling/ Mixing Station Flooring Materials Sampling/ Location C5 Initial Flooring Disturbance (Jack Hammer)/Background Location Flooring Materials Sampling/ Location F6 None Detected Tile Crushing with Grinder/ B Sample Material Flooring Materials Sampling/ Various (During Clean-up) Manual Tile Crushing/ Background Material Manual Tile Crushing/ E Sample Material Manual Tile Crushing/ D Sample Material Table 4 Air Monitoring Results - Hydrogen Cyanide Former PCA Facility 815 Matthews-Mint Hill Road Matthews, Mecklenburg County, North Carolina S&ME Project No. 1354-09-016 Sample Date/Time/ Area Activity/Sample Location (Activity Location or Material Source Location) Sample No. Result (ppm) 2-25-09/10:30/ Upper Level HCN - 1 None Detected 2-25-09/11:00/ Upper Level HCN -2 None Detected 2-25-09/11:09/ Upper Level HCN - 3 None Detected 2-25-09/12:11/ Lower Level HCN -4 None Detected 2-25-09/14:23/ Lower Level HCN - 5 None Detected 2-25-09/14:48/ Lower Level HCN - 6 None Detected 2-25-09/15:15/ Lower Level HCN - 7 None Detected 2-25-09/16:23/ Upper Level HCN - 8 None Detected 2-25-09/16:40/ Upper Level HCN - 9 None Detected 2-26-09/13:22/ Indoors (S&ME Office)HCN - 10 None Detected 2-26-09/14:00/ Outdoors (S&ME Office)HCN - 11 None Detected 2-26-09/14:13/ Outdoors (S&ME Office)HCN - 12 2-26-09/15:00/ Indoors (S&ME Office)HCN - 13 None Detected Note: ppm = parts per million parts (of air) Samples Collected on February 25 and 26, 2009 using Draeger Tubes None Detected Tile Crushing with Grinder/ B Sample Material Flooring Materials Sampling/ Various (During Clean-up) Manual Tile Crushing/ Background Material Manual Tile Crushing/ E Sample Material Manual Tile Crushing/ E Sample Material Flooring Materials Sampling/ Location B3 Initial Flooring Disturbance (Jack Hammer)/Location C5 Flooring Materials Sampling/ Location D1 Flooring Materials Sampling/ Location F5 Initial Flooring Disturbance (Jack Hammer)/Location E1 Flooring Materials Sampling/ Mixing Station Initial Flooring Disturbance (Jack Hammer)/Location E6 Flooring Materials Sampling/ Location A5 Table 5 Air Monitoring Results - Formaldehyde Former PCA Facility 815 Matthews-Mint Hill Road Matthews, Mecklenburg County, North Carolina S&ME Project No. 1354-09-016 Sample Date/Time/ Area Activity/Sample Location (Activity Location or Material Source Location) Sample No. Result (ppm) 2-25-09/10:53/ Upper Level HCHO - 1 None Detected 2-25-09/11:20/ Upper Level 0.2 2-25-09/11:30/ Upper Level 0.5 2-25-09/14:12/ Lower Level HCHO - 3 None Detected 2-25-09/14:16/ Lower Level HCHO -4 0.1 2-25-09/14:19/ Lower Level HCHO - 5 None Detected 2-25-09/14:51/ Lower Level HCHO - 6 None Detected 2-25-09/15:09/ Lower Level HCHO - 7 None Detected 2-25-09/16:16/ Upper Level HCHO - 8 None Detected 2-25-09/16:31/ Upper Level HCHO - 9 None Detected 2-26-09/13:28/ Indoors (S&ME Office) HCHO - 10 None Detected 2-26-09/13:50/ Outdoors (S&ME Office) HCHO - 11 None Detected 2-26-09/14:10/ Outdoors (S&ME Office) HCHO - 12 2-26-09/14:23/ Outdoors (S&ME Office) HCHO - 13 None Detected 2-26-09/15:07/ Indoors (S&ME Office) HCHO - 14 None Detected Note: NC OSHA Action Level is 0.5 parts per million ppm = parts per million parts (of air) Samples Collected on February 25 and 26, 2009 using Draeger Tubes Tile Crushing with Grinder/ B Sample Material Manual Tile Crushing/ F Sample Material Manual Tile Crushing/ E Sample Material None Detected Manual Tile Crushing/ D Sample Material Flooring Materials Sampling/Location C5 Flooring Materials Sampling/Location F3 Flooring Materials Sampling/Various (During Clean-up) Manual Tile Crushing/ Background Material Initial Flooring Disturbance (Jack Hammer)/Location B5 Flooring Materials Sampling/Location A5 Flooring Materials Sampling/Location B5 Initial Flooring Disturbance (Jack Hammer)/Location C6 Initial Flooring Disturbance (Jack Hammer)/Location E3 Flooring Materials Sampling/Location E1 HCHO -2 Ambient/Location E1 HCHO -2 Table 6Tile, Setting Bed and Liner Sampling ResultsFormer PCA Facility815 Matthews-Mint Hill RoadMatthews, Mecklenburg County, North CarolinaS&ME Project No. 1354-09-016EPAEPA EPA EPA EAP SW60107471 9045 733C 735S 1010Sample LocationDateCollected(mm/dd/yy)Tile A2/25/2009 4.2 153 <0.11 45.2 5.3 <1.1 7.2 --- 0.0053 12.0 <1.0 <10 >140Bedding A2/25/2009 4.4 24 <0.094 11 1.1 1.2 2.1 --- 0.0098 12.1 <1.0 <10.1 >140Tile B2/25/2009 3.2 269 2.4 49.6 8.3 <0.76 34 --- 0.025 11.9 <1.0 <10 >140Bedding B2/25/2009 4 22.8 <0.096 10.7 1.4 <0.961360.15 0.043 11.9 <1.0 <10 >140Liner B2/25/2009 0.44 2.6 0.69 54 0.9 <0.763320.11 0.018 8.5 <0.99 <9.9 >140Tile C2/25/2009 4.3 41.9 0.3 12.2 0.81 <1.1 95.2 --- 0.008 10.9 <0.98 <9.8 >140Bedding C2/25/2009 6.1 37.5 0.26 16.2 2.3 1.61710.23 0.021 12.2 <0.99 <9.9 >140Liner C2/25/2009 <0.36 33.8 <0.072 0.53 <0.36 <0.72 62.3 --- 0.017 10.1 <0.99 <9.9 >140Tile D2/25/2009 1.4 16.1 1.1 3.4 0.89 0.58 27.3 --- 0.014 11.7 <1.0 <10 >140Bedding D2/25/2009 4.1 19.1 12.1 12.3 2.8 1.22230.22 0.033 12.1 <1.0 <10 >140Tile E2/25/2009 3.2 30.2 <0.089 3.7 0.79 <0.89 28.4 --- 0.021 11.9 <0.99 <9.9 >140Bedding E2/25/2009 3.8 19.3 <0.090 10.3 1.1 1 20.8 --- 0.042 12.0 <0.99 <9.9 >140Tile F2/25/2009 3.6 107 <0.099 5 2.3 <0.99 12.5 --- 0.011 11.8 <1.0 <10 >140Bedding F2/25/2009 3.4 16.2 <0.11 8.7 1.3 <1.1 97.8 --- 0.021 11.0 <1.0 <10 >140Background Tile2/25/2009 2.8 92.7 <0.10 6.4 1.3 <1.0 10.3 --- 0.071 11.5 <0.99 <9.9 >140Background Bedding2/25/2009 6.3 88.1 0.15 12.1 4.4 1.5 18.1 --- 0.2 12.1 <0.99 <9.9 >140Maximum Detected6.3 269 12.1 54 8.3 1.6 332 --- 0.2 12.2 <1.0 <10.1 >140Hazardous Waste Limit (mg/L)NA NA NA NA NA NA NA 5 NA≤2 or≥12.5NA NA <140Hazardous Waste Limit X 20100 2,000 20 100 100 20100NA 4 NANANANANotes:Values reported in milligams per kilogram, unless otherwise noted3/16/2009Pending - Analysis is pending--- : Not AnalyzedValueExceeds 20X Hazardous Waste LimitN/A : Not ApplicableSilver (Total)Analytical Method >>Contamiant of Concern >>ArsenicBariumReactiveSulfideReactiveCyanideFlash Point(°F)CadmiumpH(Standard Units)MercurySilver (TCLP)(mg/L)ChromiumLeadSelenium Figures Scale: As Shown Checked by: Drawn by: WAQ Date: 2-20-2009 SITE LOCATION MAP 815 Matthews-Mint Hill Road Matthews, North Carolina Figure: 1 Job No.: 1354-09-016 Source: Mapquest Approximate Location of Subject Property Scale: AS SHOWN Checked by: WAQ Drawn by: NAF Date: 03/13/2009 Lower Level Sample Location Plan CPI Corp 815 Matthews-Mint Hill Rd Matthews, North Carolina Figure 2a Project No.: 1354-09-016 Base map provided to S&ME by CPI Corp. D C B A LEGEND Approximate Sample Location Area for Composite Samples A B C 1 36 5 2 4 1 2 3 4 5 6 1 2 4 6 3 5 1 2 4 3 2 Scale: AS SHOWN Checked by: WAQ Drawn by: NAF Date: 03/13/2009 Upper Level Sample Location Plan CPI Corp 815 Matthews-Mint Hill Rd Matthews, North Carolina Figure 2b Project No.: 1354-09-016 Base map provided to S&ME by CPI Corp. UPPER LEVEL E LEGEND Approximate Sample Location Area for Composite Samples E F 4 1 2 4 3 5 6 1 3 2 6 5 3 Background Sample Appendix G Randy Hoffman SAEDACCO Inc 9088 Northfield Drive Fort Mill SC 29707 803 548-2180 Temp. #1 X Mecklenburg Matthews. NC Former PCA Location 815 Matthews Mint Hill Road Matthews NC Chris Kelly 2020-E Starita Road, Charlotte, NC 28206 35 2 2 25 2 25 2 235 26 X Grouted well with trimie from the bottow to ground surface April 14, 2010 Randy Hoffman Randy Hoffman SAEDACCO Inc 9088 Northfield Drive Fort Mill SC 29707 803 548-2180 Temp. #2 X Mecklenburg Matthews. NC Former PCA Location 815 Matthews Mint Hill Road Matthews NC Chris Kelly 2020-E Starita Road, Charlotte, NC 28206 45 2 2 35 2 35 2 291 32 Grouted well with trimie from the bottow to ground surface April 14, 2010 Randy Hoffman Randy Hoffman SAEDACCO Inc 9088 Northfield Drive Fort Mill SC 29707 803 548-2180 Temp. #3 X Mecklenburg Matthews. NC Former PCA Location 815 Matthews Mint Hill Road Matthews NC Chris Kelly 2020-E Starita Road, Charlotte, NC 28206 35 2 2 25 2 25 2 245 26 X Grouted well with trimie from the bottow to ground surface April 14, 2010 Randy Hoffman Terracon Consultants, Inc. 2020 Starita Road, Suite E Charlotte, NC 28206 [704] 509 1777 terracon.com April 13, 2011 North Carolina Department of Environment and Natural Resources Division of Water Quality – Aquifer Protection Section Mooresville Regional Office 610 East Center Avenue, Suite 301 Mooresville, North Carolina 28115 Attn. Mr. Andrew Pitner Re: Closure Report Addendum Former PCA Facility 815 Matthews Mint Hill Road Matthews, Mecklenburg County, North Carolina Terracon Project No. 71087772 Dear Mr. Pitner: Terracon is pleased to submit this Closure Report Addendum to the Division of Water Quality (DWQ) in response to your letter to CPI Corp. dated December 10, 2010. The Closure Report was completed by Terracon on April 16, 2010 and submitted to Ms. Robin Proctor of the Division of Waste Management (DWM) for her review and comments. Based on her review, it was determined that the project was being transferred from the DWM to the DWQ (inter-agency letter from Ms. Proctor to you on October 4, 2010). According to your letter to CPI Corp., the horizontal extent of silver impact in soils has been reasonably defined, but the vertical extent has not been determined. As a result of insufficient vertical delineation, the DWQ is unable to issue a No Further Action (NFA) letter at this time. Additionally in the letter, you requested information regarding the determination of a Soil Screening Level (SSL) for silver that is protective of groundwater and the construction and location details for a water-supply well identified during the sensitive receptor survey. Our responses are discussed below. Site-Specific SSL At your request, a site-specific soil concentration for silver has been calculated utilizing the NCDENR Transport Model for Calculation of Soil-To-Groundwater Maximum Contaminant Concentrations (shown below). Our intent was to determine a site-specific SSL that would exceed the highest concentration of silver detected in soils within the basement area of the vacant PCA building (worst-case scenario) thereby being protective of human health and resulting in no groundwater quality violation for the site. Former PCA Facility Terracon Project No. 71087772 April 13, 2011 2 Csoil = CGW KD +(θW+θa(H')) Pb df Where: Csoil is the Site-Specific Maximum Soil Contaminant Concentration CGW is the Applicable Groundwater Contaminant Concentration – the NCDENR 2L Standard for silver in groundwater is 0.020 mg/L KD is the Soil-Water Partition Coefficient – determined to be 207 L/kg for silver based on a site- specific calculation completed by the University of Georgia Crop and Soil Sciences Lab (see attached methodology) θW is the Water Filled Porosity for Vadose Soil – Set at 0.3 θa is the Air Filled Porosity for Vadose Soil – Set at 0.13 H’ is the Henry’s Law Constant for Silver – determined to be 0 for silver through literature review Pb is the Dry Bulk Density – Set at 1.5 df is the Dilution Factor – Set at 20 Our literature review of soil-water partition coefficients provided a wide range of information and results based on soil pH, soil classifications, and organic content. Published values for silver Kd ranged from 2 L/kg to 33,000 L/kg. In order to determine the most accurate Site-Specific Maximum Soil Contaminant Concentration, a soil sample was collected from outside the basement area away from impacted soils at an approximate depth of 4 feet below grade. The soils were submitted to the University of Georgia Crop and Soil Sciences Laboratory to determine a site-specific Kd for silver. Please note that silver nitrate, a soluble form of silver, was utilized during Kd determination. The form of silver released during the photograph development process is silver sulfide which cannot be utilized for Kd determination or detected in standard laboratory analytical procedures due to its insolubility. The results and methodology conducted by the soils laboratory are attached to this addendum report. Based on the model, Terracon determined the site-specific SSL for silver to be 82.88 mg/kg. The site-specific SSL is below the highest silver concentration identified during our soil sampling activities in the worst-case scenario area. Therefore, based on the presence of silver in soils, conservative modeling indicates a potential impact to groundwater. Using the identified silver concentrations in the worst case location (highest identified silver concentration) and the highest silver concentration identified at the greatest depth within the basement, the anticipated groundwater concentrations were calculated using the equation below. Csoil CGW = KD * (θW+θa(H')) Pb * df Former PCA Facility Terracon Project No. 71087772 April 13, 2011 3 According to the model, the highest concentration detected at the site (311 mg/kg silver) would result in a groundwater concentration of 375 micrograms/Liter (ug/L). The highest silver concentration identified at the greatest depth (188 mg/kg) would result in a groundwater concentration of 227 ug/L. Both anticipated concentrations are above the current NCDENR 2L Groundwater Quality Standard for silver (20 ug/L). Please note that this calculation assumes silver would be fully leachable at the site. Based on the conservative nature of the above calculations, it is Terracon’s opinion that the anticipated groundwater concentrations are not indicative of actual groundwater conditions in the basement near the highest silver concentrations in the soil. Groundwater samples collected as part of the Closure Report investigation in one upgradient and two downgradient monitoring wells installed at the site did not identify detectable levels of silver. Based on the location of the silver-impacted soils within the basement area and the chemistry associated with the photograph development process as described in Terracon’s April 2010 Closure Report, the potential for leachable silver to encounter precipitation percolating through the soils or groundwater is unlikely. Terracon analyzed soil samples by the Toxicity Characteristic Leachate Procedure (TCLP) during our soils investigation in 2009. The results of the TCLP analyses indicated silver was not leaching out of the impacted soils, even at the highest detected concentrations. While TCLP is not considered an acceptable test for an in-situ soil leaching assessment by the NCDENR, Terracon requests consideration of the previous TCLP results to demonstrate the lack of leachable silver in the soils at the site. If the TCLP results are not considered acceptable by the DWQ, Terracon requests permission to collect two soil samples, one from the area where the highest silver concentration was identified and a second vertical extent sample beneath the location of the highest silver concentration. The samples would be analyzed by the Synthetic Precipitation Leaching Procedure (SPLP), EPA Method 1312 which simulates in-situ leaching conditions over time. The SPLP procedure would be expected to provide information on the potential impact of leachable silver to groundwater at the site. Photofinishing Chemistry Background According to Ms. Shirley Touchette, an Environmental Specialist with CPI Corp., extensive knowledge and experience with the photographic process and the environmental effects of these processes, has been accumulated by herself and Mr. Tim Price, Vice President of Risk Management with CPI Corp. Mr. Price indicated the former PCA facility utilized the EP-2 and RA-4 chemical processes to develop color photographic paper and the C-41 chemical process to develop color film. The photofinishing operation consists of treating a silver halide-sensitized material with a series of dilute chemical solutions and wash steps to produce a visible image. Former PCA Facility Terracon Project No. 71087772 April 13, 2011 4 The C-41 fixer processing solution (film) is composed of ammonium thiosulfate (58%) and sodium sulfite. The EP-2/RA-4 bleach-fix processing solution (paper) is mainly composed of ferric ammonium EDTA (60%), ammonium thiosulfate (58%) and sodium sulfite. During the processing of photographic film and paper, silver is removed from the film and paper by two of the chemical processing solutions. During this process, the ammonium thiosulfate is converted into silver thiosulfate. The fixer from the film processor is electrolytically de-silvered, and then regenerated for reuse. The bleach-fix from the paper processors is also electrolytically de-silvered separately from the C-41 Fixer and regenerated for reuse in the paper processors. Excess bleach-fix flows through a set of metallic replacement cartridges (removes remaining silver) before discharge to the sanitary sewer. The process wastewater from this facility was discharged in compliance with an industrial discharge permit issued by the Charlotte-Mecklenburg Utility District. Physical Properties for Silver Sulfide The most common form of naturally occurring silver ore is argentite, commonly called, silver sulfide. Silver is a very inactive metal. It does not react with oxygen in the air under normal circumstances; however, it does react slowly with sulfur compounds in the air, forming silver sulfide. The solubility factor, referred to as Ksp, of silver sulfide is 6.0 x 10-51. In comparison, the Ksp of silver nitrate is 51.6. There is clear evidence that silver present as silver-thiosulfate complex in photographic processing effluents can be adequately treated biologically. Most of the silver-thiosulfate complex will be converted biologically to forms such as metallic silver and silver sulfide. There are two types of in-situ remediation techniques for free silver-contaminated soils, stabilization and bioremediation. The stabilization technique converts soluble silver compounds to silver sulfide by injecting sulfur compounds, specifically polysulfides, into the contaminated soils. Bioremediation also injects polysulfides into the contaminated soils with the addition of a food source for the bacteria. This food source is typically a food-grade vegetable oil. Both in- situ remediation techniques convert soluble silver into insoluble silver sulfide, the compound that has been released to subsurface soils at the site from the photograph development process. Additional Sensitive Receptor Information Terracon contacted Presbyterian Hospital Matthews for information regarding the water supply well located at their facility. According to Mr. Matthew Sonoski of Novant Health (Presbyterian Hospital Matthews), the water well is located in the north-central portion of the Presbyterian Hospital Matthews property, approximately 1,100 feet northwest of the nearest PCA boundary and approximately 1,450 feet from the impacted subsurface soils within the PCA facility basement. Former PCA Facility Terracon Project No. 71087772 April 13, 2011 5 The 6-inch diameter well is constructed with steel casing extending to a depth of 186 feet below the ground surface. The well is reportedly capable of producing approximately 26 gallons of water per minute. Presbyterian Hospital Matthews utilizes the well to maintain the water level of a pond located adjacent to the well. The pond provides water for irrigation on the hospital property but does not provide potable water to the hospital. Mr. Sonoski indicated the hospital has considered using the well as a source of potable water during an emergency or disaster situation; however, there are no finalized plans to use the well or pond as a potable water source. The groundwater flow direction established during our closure report activities indicated groundwater flow at the site is to the northeast, away from Presbyterian Hospital Matthews. Furthermore, the laboratory analyses conducted during the closure report indicated no detectable levels of silver in the upgradient and downgradient monitoring wells on the site. Based on the additional information provided above, we respectfully request consideration of the site-specific SSL and TCLP results, as well as the additional sensitive receptor information provided above. We appreciate your assistance and regulatory guidance as we work toward closure of the release in compliance with DWQ guidelines. Please contact us if you have other questions regarding the closure activities conducted at the former PCA facility. Sincerely, Chris Kelly, LEED AP Christopher L. Corbitt, P.G. Environmental Scientist Environmental Services Manager CC: Ms. Shirley Touchette of CPI Corp. Attachments: University of Georgia Crop and Soil Sciences Site-Specific Kd Results and Methodology KD Determination for Silver (Ag) for Soil Material from PCA Facility, Matthews NC requested by Terracon Consultants Project 71087772 Christopher Kelly Prepared by Dr. William Miller Laboratory for Environmental Analysis (LEA) University of Georgia Athens GA 30602 April 8, 2011 Background Soil material (2 bags, replicates) was shipped to LEA by Chris Kelly from Terracon for determination of a KD value for Ag. The soil is reddish‐brown, and was estimated to be a subsoil (low organic matter content) containing roughly 30‐35% clay (by feel) with a low sand content (silty clay loam or silty clay USDA textural class). Soil pH measured in a 2 water: 1 soil slurry was 4.9. Preliminary testing indicated water‐soluble Ag and total nitric‐acid digestible Ag (EPA 3052) were below the detection limit of the method (0.5 ug/L in solution, or 1 mg/kg in soil ). Methodology The soil was air‐dried and screened to < 2 mm to homogenize. The adsorption isotherms were carried out in acid‐washed (HNO3) 40 mL polycarbonate centrifuge tubes. 2.00 (±0.02) g samples of soil were weighed into the tubes. Silver stock solutions were made up from AgNO3 (AR grade) in deionized water. Preliminary testing of pH adjustment to 5.5 (using NaOH, as requested by Terracon) indicated 1 mL of 0.01 M NaOH was sufficient to raise 2 g of soil to this pH value. This amount of base was added to the Ag solutions prior to addition to the soils described below. The stock Ag solutions were diluted to make up 40 mL aliquots for equilibrations with the soil samples. After preliminary testing, the following concentrations were used: 0 (blank), 10, 25, 50, and 100 µg/L. Solutions were added to the tubes containing the soil and equilibrated at lab temperature for 16 h on a rotating (inverting) shaker. Three of the concentrations were replicated 3 times. After equilibration the tubes were centrifuged at 5,000 rpm, which resulted in clear solutions which were pipetted off in preparation for analysis. The ICP‐MS used was a Perkin‐Elmer/Sciex 6000 instrument, tuned to Ag isotope of mass 107. An internal standard of Rh was used in all runs and a signal ratio method was used in the calibration over the range of 0‐100 µg/L. ICP‐grade standard Ag solutions were used in the calibrations. Sample solutions were diluted if necessary to within the calibration range, spiked with the internal standard, and analyzed using standard settings on the ICP‐MS. Results The blank samples contained Ag levels below the detection limit of the method (0.2 µg/L), and thus no corrections for released (desorbed) Ag were necessary. QC checks were made throughout the run, including replicate determinations on two selected concentrations (25 and 100 ppb added, meaning three tubes of soil were weighed out and equilibrated), and QC standard measurements were also made during the ICP‐MS run. Replicates measuring below 1 ppb showed some variation about the mean, but at 10 ppb they were very consistent (Table 1). Similarly, QC check standards run during the sample run were very close to their accepted values. Table 1. QC measurements for Ag ICP‐MS determination (April 7, 2011) Replicate ppb QC std ppb measured 25A 0.45 5.00 4.87 25B 0.86 10.00 10.00 25C 0.62 100.00 104.80 100A 9.39 100B 9.40 100C 9.41 The KD plot was constructed in units of mg Ag/L [equilibrium concentration, C] vs. mg Ag/kg [sorbed, S]. The later value was computed as: (Cinitial – Cequil) x 0.04L / 0.002 kg where the initial and final concentrations (in mg/L) were used, along with sample volume and soil mass. KD was determined as the slope of the plotted line (C vs. S, using the Excel trendline feature, forcing through “0”) for this concentrations range. The value shown in Figure 1 is 207. The fit of this line is acceptable although not extremely good; there seems to be a trend for the sorption to be leveling off, even at theses low values. However, the line seems to reasonably describe Ag removal from solution, given the choice of concentrations and experimental conditions used. Figure 1. KD plot for Matthews, NC soil adjusted to pH 5.5 over the range of initial concentrations (added) of 0 to 0.1 mg/L.