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Home My WebLink About13020_Newman Machine_Post_Construction_Sub-Slab_Sampling_09_28_2011 N.C. Brownfields Program Post-Construction Sub-Slab Sampling The Province at UNC Greensboro Greensboro, North Carolina September 28, 2011 Terracon Project No. 71097746 Prepared for: ECCC-NC, LLC Columbus, Ohio Prepared by: Terracon Consultants, Inc. Charlotte, North Carolina Terracon Consultants, Inc. 2020-E Starita Road Charlotte, North Carolina 28206 P [704] 509 1777 F [704] 509 1888 terracon.com September 28, 2011 Mr. Mike Cannon, President ECCC-NC, LLC Edwards Communities Construction Company 151 South High Street Charlotte, North Carolina 28204 Re: North Carolina Brownfields Program Post-Construction Sub-Slab Vapor Sampling Report The Province at UNC Greensboro Province Spring Circle Greensboro, Guilford County, North Carolina Project No. 71097746 Dear Mr. Cannon: Terracon Consultants, Inc. (Terracon) appreciates the opportunity to submit this Post- Construction Sub-Slab Vapor Sampling Report for the referenced site in order to assist ECCC-NC, LLC in finalizing their North Carolina Brownfields Agreement. We appreciate the opportunity to perform these services for you. Please contact us if you have questions regarding this information or if we can provide any other services. Sincerely, Terracon Consultants, Inc. Stephen C. Brown Christopher L. Corbitt, PG Project Geologist Environmental Services Manager Reliable ■ Responsive ■ Convenient ■ Innovative i TABLE OF CONTENTS 1.0 INTRODUCTION ......................................................................................................... 1 1.1 Site Description .................................................................................................. 1 1.2 Background ........................................................................................................ 1 1.3 Scope of Services .............................................................................................. 2 2.0 REFERENCES ............................................................................................................ 2 3.0 POST-CONSTRUCTION SUB-SLAB VAPOR SAMPLING ....................................... 2 3.1 Sub-Slab Vapor Point Installation ...................................................................... 2 3.2 Sample Point Tracer Test .................................................................................. 3 3.3 Sub-Slab Vapor Sample Collection .................................................................... 3 4.0 ANALYTICAL RESULTS AND DATA EVALUATION ............................................... 4 4.1 Sub-Slab Vapor Data ......................................................................................... 4 4.2 Quality Control Data Evaluation ......................................................................... 4 4.3 Data Evaluation .................................................................................................. 5 APPENDICES APPENDIX A Figure 1 – Site Location Map Figure 2 – Sample Location Plan APPENDIX B Photographs APPENDIX C Table 1 – Vapor Sampling Point Tracer Test Data Table 2 – Sub-Slab Vapor Sampling Analytical Results Summary APPENDIX D Laboratory Analytical Report Reliable ■ Responsive ■ Convenient ■ Innovative 1 POST-CONSTRUCTION SUB-SLAB VAPOR SAMPLING REPORT THE PROVINCE AT UNC GREENSBORO PROVINCE SPRING CIRCLE GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA Project No. 71097746 Report Date: September 28, 2011 1.0 INTRODUCTION 1.1 Site Description Site Description Site Name The Province at UNC Greensboro Site Location/Address Province Spring Circle Greensboro, Guilford County, North Carolina Land Area Approximately 11 acres Site Improvements The site is developed with twelve residential buildings containing 219 units, a clubhouse and a maintenance building. Remaining portions of the site are ashphalt-paved roadways and parking areas containing 624 parking spaces. The site location is depicted on Figure 1 of Appendix A which was reproduced from a portion of the USGS 7.5-minute series topographic map. 1.2 Background At the request of the North Carolina Brownfields Program (NCBP), Terracon conducted soil gas sampling activities at the site on June 17, 2010, prior to demolition of the former on-site buildings. The sample locations were selected based on locations where chlorinated compounds in groundwater had previously been identified by Terracon, the location’s proximity to the proposed Province at UNC Greensboro buildings and comments from NCBP project manager, Mr. Tony Duque. Based on the laboratory analytical results, benzene was detected at a concentration of 45 micrograms per cubic meter (µg/m3) in soil gas sample SG-2 collected in an area near the east side of Building 6. The regulatory screening level for benzene is 31 µg/m3. No target analytes were detected in nearby sample location SG-1 above their respective regulatory screening threshold values. The benzene appeared to be attributable to gasoline constituents detected in groundwater (MW-3) near this area of the site. During subsequent construction activities, the fill soils in the area surrounding locations SG-1 and SG-2 (originally planned to remain near grade) were undercut for engineering Post Construction Sub-Slab Vapor Sampling Report The Province at UNC Greensboro ■ Greensboro, North Carolina September 28, 2011 ■ Terracon Project No. 71097746 Reliable ■ Responsive ■ Convenient ■ Innovative 2 purposes by as much as 10 feet where residual soils were encountered. A thickness of 5 to 10 feet of clean silty/coarse sands was utilized as fill under Building 6 to replace the undercut soils. 1.3 Scope of Services The proposed scope of work is in response to a request from the NCBP to evaluate the potential presence of benzene vapors in soils immediately below the floor slab in Building 6 and above an area of the site containing dissolved petroleum constituents in groundwater. An interior, ambient air blank was collected in Building 6 to assess field/equipment conditions (false positives) at the time of sampling. This assessment was conducted for confirmatory purposes and was not intended to be a comprehensive assessment. Therefore, no duplicate samples were conducted. 2.0 REFERENCES US EPA’s “OSWER Draft Guidance for Evaluating the Vapor Intrusion to Indoor Air Pathway from Groundwater and Soils (Subsurface Vapor Intrusion Guidance)”, dated November 2002. Vapor Intrusion Sampling Draft Guidance – NCDENR Brownfields Program, dated February 17, 2010. Section 3.0 of the report “Assessment of Vapor Intrusion in Homes Near the Raymark Superfund Site Using basement and Sub-Slab Air Samples” (EPA600/R-05/147) dated March 2006. EPA Method TO-15 – Compendium of Methods for the Determination of Toxic Organic Compounds in Ambient Air (EPA/625/R-96/010b), Second Edition dated January 1999 as guidance documents. 3.0 POST-CONSTRUCTION SUB-SLAB VAPOR SAMPLING 3.1 Sub-Slab Vapor Point Installation In order to evaluate potential vapor intrusion concerns, three temporary vapor points were installed at selected locations in Building 6. One vapor point was installed in an area northeast of former well MW-3 below the upper level slab in Building 6 (PCSG-1) and two vapor sampling points below the basement floor slab of Building 6 (PCSG-2 and PCSG- Post Construction Sub-Slab Vapor Sampling Report The Province at UNC Greensboro ■ Greensboro, North Carolina September 28, 2011 ■ Terracon Project No. 71097746 Reliable ■ Responsive ■ Convenient ■ Innovative 3 3). The approximate sample locations are shown on the Sample Location Plan which is included as Figure 2 of Appendix A. The sampling points were installed using a rotary hammer drill to advance a small diameter hole through the floor slab to about 6 inches into the sub-slab media. A new, stainless steel soil gas implant attached to Teflon tubing was inserted into the boring (Photograph 1) and the annular space between the implant and the boring was backfilled with well sand and granular bentonite hydrated with de-ionized water (Photograph 2) to form a competent seal. The sample location was then capped with a clay seal (Photograph 3). 3.2 Sub-Slab Vapor Sample Collection The vapor samples were collected from each sampling point with 6-liter (L) Summa canisters supplied by the laboratory (Photograph 4). Each canister was filled using a dedicated, 30-minute (min), flow controller set to a sample rate less than or equal to 200 milliliters (mL) per min (200 mL/min x 30 min = 6 L sample volume). An “in line” vacuum gauge was installed at the sample controller to verify initial vacuum levels within the canister and as an indicator that final pressure equalization has been reached (i.e. sampling is complete). General weather conditions at the time of sampling (temperature, humidity) are included in Table 2. 3.3 Quality Control Tracer Test In order to test the integrity of the gas vapor point seal, a tracer test was conducted at each sample point using helium gas. Prior to tracer testing, ambient air and soil tracer gas background levels were recorded using a Radiodetection MGD-2002 Multi-Gas Leak Locator to check background helium levels and evaluate soil gas for false positives (Photograph 5). After background readings were established, an approximate 20-liter volume enclosure (5-gallon bucket) was placed over the soil vapor point. Helium was introduced into the enclosure until the ambient air was purged from the enclosed volume and displaced by tracer gas. Helium was continually introduced for the duration of the sample collection period in order to maintain positive helium pressure in the shroud. Purging was considered complete when the helium concentration in the enclosure was greater than 10% by volume in air. If the concentration in the vapor point was less than 10% of the tracer gas concentration in the enclosure, the tracer test was considered to be working effectively. A vapor sample was extracted from the sample tubing via the instrument’s internal pump at a rate of less than 200 mL/min for 30 min and analyzed by the helium detector. The concentrations measured in the gas vapor points ranged from 0.3% to 1% of the Post Construction Sub-Slab Vapor Sampling Report The Province at UNC Greensboro ■ Greensboro, North Carolina September 28, 2011 ■ Terracon Project No. 71097746 Reliable ■ Responsive ■ Convenient ■ Innovative 4 concentrations detected in the enclosure, indicating a competent vapor point seal at each probe. Tracer testing data is included as Table 1. Ambient Air Blank An ambient air blank was collected inside Building 6 to assess field/equipment conditions (false positives) at the time of sample collection. The blank was collected through a new, dedicated control valve and section of tubing (Photograph 6). Following completion of the field activities, the Summa canisters and the chain-of-custody documentation, were be shipped to Pace Analytical Services, Inc., in Minneapolis, Minnesota for laboratory analysis of volatile organic compounds (VOCs) and helium by EPA Methods TO-15 and 3C, respectively. 4.0 ANALYTICAL RESULTS AND DATA EVALUATION 4.1 Sub-Slab Vapor Data Soil gas data were compared to the USEPA “OSWER Draft Guidance for Evaluating the Vapor Intrusion to Indoor Air Pathway from Ground water and Soils” (Subsurface Vapor Intrusion Guidance) Tier III, Table 2b: Soil Gas Screening Levels at a risk level of 10-5 for shallow soil gas and NCDENR Inactive Hazardous Sites Branch “Residential Vapor Intrusion Screening Levels” (August 2011 version). Compounds detected above the method detection limit include acetone, benzene, 2- butanone (MEK), carbon disulfide, chloroform, cyclohexane, ethyl acetate, ethylbenzene, n-hexane, methylene chloride, 4-methyl-2-pentanone (MIBK), naphthalene, tetrachloroethene, toluene, trichloroethene, trochlorofluoromethane, m&p xylene and o- xylene. Naphthalene was detected in sample PCSG-1 at a concentration of 6.5 micrograms per cubic meter (µg/m³). The USEPA OSWER and NCDENR IHSB screening level for naphthalene is 30 and 6.2 µg/m³, respectively. Chloroform was detected in sample PCSG-2 at a concentration of 29.5 µg/m³. The USEPA OSWER and NCDENR IHSB screening level for chloroform is 11 µg/m³. The laboratory analytical results are summarized in Table 2. 4.2 Quality Control Data Evaluation Tracer testing and ambient air blank data were evaluated for bias as outlined in the Work Plan. TO-15 data collected from the blank/ambient sample was used to evaluate potential Post Construction Sub-Slab Vapor Sampling Report The Province at UNC Greensboro ■ Greensboro, North Carolina September 28, 2011 ■ Terracon Project No. 71097746 Reliable ■ Responsive ■ Convenient ■ Innovative 5 high bias from sample materials or ambient sources. These data were compared to soil vapor data for correlation of results. Tracer Testing Tracer testing data are considered “passing” if helium concentrations in the vapor point are less than 10% of the concentration of the tracer gas in the overlying vessel. Passing tests indicate that the point is properly sealed from breakthrough of ambient air above the surface (i.e. dilution of the sample). At all vapor points, tracer testing indicated helium concentrations in the vapor point were significantly less than one percent (or less) of the overlying vessel concentrations. While there was minimal breakthrough, all vapor points were considered passing, and therefore properly sealed. Ambient Air/Equipment Blank The TO-15 analytical results for sample AA-1 detected acetone (523 µg/m³), benzene (3.3 µg/m³), 2-butanone [MEK] (33.8 µg/m³), carbon disulfide (0.85 µg/m³), cyclohexane (11.8 µg/m³), ethylbenzene (8.1 µg/m³), 4-ethyltoluene (7.9 µg/m³), n-heptane (33.5 µg/m³), n- hexane (196 µg/m³), methylene chloride (1.2 µg/m³), 4-methyl-2-pentanone [MIBK] (6.7 µg/m³), naphthalene (34 µg/m³), toluene (466 µg/m³), 1,2,4-trimethylbenzene (37.8 µg/m³), 1,3,5-trimethylbenzene (8.1 µg/m³), m&p xylene (27.9 µg/m³) and o-xylene (10.8 µg/m³). In our opinion, the detected concentrations appear to be derived from the use of finishes and mastics that were present at the time of our field activities. Data from the equipment blank/ambient air sample (AA-1) were compared to sub-slab vapor data for correlation of results. The detected analyte concentrations indicate a potential for high bias from ambient conditions or sampling/analytical equipment sources of these compounds. However, even with the potential for high bias, the remaining detected compounds were not reported above their respective IHSB Residential Vapor Intrusion Screening Levels in the sub-slab vapor samples. Therefore, the potential effects of high bias are not deemed significant. 4.3 Data Summary Vapor sample PCSG-1 was collected in the upper level of Building 6 in a location that is upgradient to the location where pre-construction soil gas sample SG-2 (benzene, 45 µg/m³) was collected in June 2010. Sample point PCSG-1 was also located near a historical underground gasoline storage tank system (UST) at the former Newman Machine facility when gasoline constituents had been detected in soils and groundwater (B-3/MW-3. Naphthalene was detected in sample PCSG-1 at a concentration of 6.5 µg/m³. While the detected naphthalene vapor concentration was above the NCDENR Post Construction Sub-Slab Vapor Sampling Report The Province at UNC Greensboro ■ Greensboro, North Carolina September 28, 2011 ■ Terracon Project No. 71097746 Reliable ■ Responsive ■ Convenient ■ Innovative 6 IHSB regulatory threshold of 6.2 µg/m³, it was well below the USEPA screening level of 30 µg/m³. Naphthalene was also detected in the ambient air blank. Furthermore, since the naphthalene source (contaminated soils) has been removed from the site, we anticipate naphthalene vapors to attenuate over time. Vapor sample PCSG-2 was collected in the lower level of Building 6 in a location that is downgradient to the location where pre-construction soil gas sample SG-2 was collected in June 2010. Chloroform was detected in sample PCSG-2 at a concentration of 29.5 µg/m³, which is above the NCDENR IHSB and US EPA screening level of 11 µg/m³. During construction activities, a large water main from the filtration plant to a water tower located to the west of the site was cut at least three times. Terracon personnel observed municipal water flowing overland across this area of the site and filling an on-site stormwater pond. In our opinion, the chloroform is an artifact from the municipal water supply release. No other chlorinated constituents were detected in sample PCSG-2. We anticipate chloroform vapors to attenuate over time. APPENDIX A Figure 1 – Site Location Map Figure 2 – Sample Location Plan N SITE LOCATION MAP THE PROVINCE AT UNC GREENSBORO PROVINCE SPRING CIRCLE GREENSBORO, NORTH CAROLINA REFERENCE: USGS Topographic Map; Guilford, North Carolina Q SITE PROJECT NO.: 71097746 DATE: July 21, 2011 DRAWN BY: SCB SCALE: 1” = 2000’FIGURE NO. 1 Quadrangle; dated 1951 and revised in 1994. SG 1 PC S G - 1 SG -1 MW - 2 PCSG-2 MW - 3 / B- 3 MW - 1 SG-2 PCSG-3 SAMPLE LOCATION PLANdenotes approximate site boundary.DATE: Jul y 8 , 2011PROJECT NO.: 71097746THE PROVINCE AT UNC GREENSBORO PROVINCE SPRING CIRCLE GREENSBORO N O R T H C A R O L I N A FIGURE NO. 2 1” ≈ 110’y,GREENSBORO , NORTH CAROLINA RE F E R E N C E : S i t e p l a n p r o v i d e d b y C P T E n g i n e e r i n g & S u r v e y , I n c . APPENDIX B Photographs Project No. 71097746 Date Photos Taken: July 21, 2011 The Province – Greensboro, North Carolina Photo 1 Typical view of a stainless steel vapor implant. Photo 2 De-ionized water was used to hydrate the bentonite. Project No. 71097746 Date Photos Taken: July 21, 2011 The Province – Greensboro, North Carolina Photo 3 View of a completed sampling point prior sample collection. Photo 4 Typical view of a sample collection train with active tracer test. Project No. 71097746 Date Photos Taken: July 21, 2011 The Province – Greensboro, North Carolina Photo 5 View of background readings prior to completing a sampling point. Photo 6 View of ambient air/equipment blank sample collection in progress. APPENDIX C Table 1 – Vapor Sampling Point Tracer test Data Table 2 – Sub-Slab Vapor Sampling Analytical Results Summary TA B L E 1 VA P O R S A M P L I N G P O I N T T R A C E R T E S T D A T A Th e P r o v i n c e a t U N C G r e e n s b o r o Gr e e n s b o r o , N o r t h C a r o l i n a Te r r a c o n P r o j e c t N o . 7 1 0 9 7 7 4 6 VA P O R PO I N T DA T E ME A S U R E D VE S S E L [ H e ] (p p m ) HI G H E S T i n PO I N T [ H e ] (p p m ) ST E A D Y S T A T E PO I N T [ H e ] (p p m ) BR E A K T H R O U G H (% ) TE S T PA S S / F A I L ? PC S G - 1 7 / 2 1 / 2 0 1 1 5 4 0 , 0 0 0 1 , 9 2 5 1 , 9 2 5 0 . 3 6 PA S S PC S G - 2 7 / 2 1 / 2 0 1 1 8 0 0 , 0 0 0 4 2 5 4 2 5 0 . 0 5 PA S S PC S G - 3 7 / 2 1 / 2 0 1 1 3 9 7 , 0 0 0 5 0 0 5 0 0 0 . 1 3 PA S S NO T E S : 1) [ H e ] = H e l i u m c o n c e n t a t i o n i n p a r t s p e r m i l l i o n ( p p m ) 2) V e s s e l [ H e ] = H e l i u m c o n c e n t a t i o n i n t h e o v e r l y i n g v e s s e l 3) H i g h e s t i n P o i n t [ H e ] = h i g h e s t H e l i u m c o n c e n t a t i o n r e c o r d e d i n t h e s o i l v a p o r p o i n t d u r i n g t h e t e s t 4) S t e a d y S t a t e P o i n t = t h e c o n c e n t r a t i o n o f H e l i u m i n e a c h p o i n t a t t h e e n d o f t h e t r a c e r t e s t 7) B D L = b e l o w i n s t r u m e n t d e t e c t i o n l i m i t s 6) A p o i n t i s c o n s i d e r e d P a s s i n g i f B r e a k t h r o u g h i s l e s s t h a n o r e q u a l t o 1 0 % o f t h e o v e r l y i n g v e s s e l [ H e ] 5) B r e a k t h r o u g h = ( H i g h e s t i n P o i n t [ H e ] ÷ V e s s e l [ H e ] ) x 1 0 0 TA B L E 2 Po s t - C o n s t r u c t i o n S u b - S l a b V a p o r S a m p l i n g A n a l y t i c a l R e s u l t s S u m m a r y Th e P r o v i n c e a t U N C G r e e n s b o r o Gr e e n s b o r o , N o r t h C a r o l i n a Te r r a c o n P r o j e c t N u m b e r : 7 1 0 9 7 7 4 6 TO - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 T O - 1 5 Da t e Co l l e c t e d (m m / d d / y y ) Te m p . (°F) Hu m i d i t y (% ) SG - 1 6 / 1 7 / 1 0 - - 85 N D 3 4 5 9 N D N D N D N D N D N D N D N D N D N D N D N D 3 2 N D N D N D N D 1 1 N D PC S G - 1 7 / 2 1 / 1 1 8 6 6 0 19 2 1 . 2 1 3 . 2 6 . 5 N D 6 . 5 2 6 . 6 2 . 6 N D N D 1 0 7 7 3 . 2 1 . 6 6.5 8 N D 1 3 7 1 . 1 1 . 6 4 . 1 N D 8 . 3 2 . 6 PC S G - 2 7 / 2 1 / 1 1 8 4 7 2 81 . 5 N D 1 5 4 . 6 29 . 5 ND N D N D N D N D 1 4 1 3 . 4 N D 5 N D N D 5 6 9 N D N D N D N D 3 . 7 N D PC S G - 3 7 / 2 1 / 1 1 8 4 6 9 81 . 5 N D 3 . 8 3 . 6 N D N D N D N D N D N D N D N D N D 9.7 4.8 9 3 . 8 N D N D N D N D N D N D AA - 1 7 / 2 1 / 1 1 8 6 5 8 52 3 3 . 3 3 3 . 8 0 . 8 5 N D 1 1 . 8 N D 8 . 1 7 . 9 3 3 . 5 1 9 6 1 . 2 6 . 7 3 4 * * N D N D 4 6 6 N D N D 3 7 . 8 * * 8 . 1 2 7 . 9 1 0 . 8 64 , 0 0 0 3 1 1 0 , 4 0 0 1 , 4 6 0 1 1 N L N L 9 7 N L N L 1 , 4 6 0 5 2 0 6 , 2 0 0 6 . 2 4 1 N L 1 0 , 4 0 0 1 2 0 1 , 4 6 0 1 4 . 6 N L 2 0 0 2 0 0 35 0 0 3 1 1 0 , 0 0 0 7 , 0 0 0 1 1 N L 3 2 , 0 0 0 2 2 0 N L N L 2 , 0 0 0 5 2 0 8 0 0 3 0 8 1 N L 4 , 0 0 0 2 . 2 7 , 0 0 0 6 0 6 0 7 0 , 0 0 0 7 0 , 0 0 0 • L a b o r a t o r y r e s u l t s r e p o r t e d i n m i c r o g r a m s p e r c u b i c m e t e r ( µ g / m 3 ). • B o l d f a c e t y p e i n d i c a t e s s a m p l e c o n t a m i n a n t a b o v e r e g u l a t o r y s c r e e n i n g l e v e l . ** W h i l e c o n s t i t u e n t e x c e e d s i t s r e g u l a t o r y s t a n d a r d , t h e s a m p l e w a s c o l l e c t e d a s a n e q u i p m e n t b l a n k . T h e a n a l y t i c a l r e s u l t i s n o t c o n s i d e r e d t o b e d e r i v e d f r o m s u b - s l a b c o n d i t i o n s . m e t h y l e n e c h l o r i d e 1,3,5-trimethylbenzene US E P A O S W E R S c r e e n i n g L e v e l s ( R i s k = 1 x 1 0 -5 ) IH S B R e s i d e n t i a l V a p o r I n t r u s t i o n S c r e e n i n g Le v e l s - S o i l G a s ( A u g u s t 2 0 1 1 ) 2 - b u t a n o n e ( M E K ) b e n z e n e a c e t o n e c h l o r o f o r m An a l y t i c a l M e t h o d Sa m p l e ID # o - xylene n a p h t h a l e n e tetrachloroethene toluene trichloroethene trichloro-fluoromethane c a r b o n d i s u l f i d e Co n t a m i n a n t o f Co n c e r n → m&p - xylene 4 - m e t h y l - 2 - p e n t a n o n e ( M I B K ) 1,2,4-trimethylbenzene c y c l o h e x n e e t h y l a c e t a t e 4 - e t h y l t o l u e n e tetrahydrofuran e t h y l b e n z e n e n - h e p t a n e n - h e x a n e APPENDIX D Laboratory Analytical Report August 09, 2011 LIMS USE: FR - STEPHEN BROWN LIMS OBJECT ID: 9299107 9299107 Project: Pace Project No.: RE: Mr. Stephen Brown Terracon 2020 E Starita Road Charlotte, NC 28206 THE PROVINCE AT UNCG Dear Mr. Brown: Enclosed are the analytical results for sample(s) received by the laboratory on July 27, 2011. The results relate only to the samples included in this report. Results reported herein conform to the most current TNI standards, where applicable, unless otherwise narrated in the body of the report. Analyses were performed at the Pace Analytical Services location indicated on the sample analyte page for analysis unless otherwise footnoted. If you have any questions concerning this report, please feel free to contact me. Sincerely, Kevin Herring kevin.herring@pacelabs.com Project Manager Enclosures 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 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 CERTIFICATIONS Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Minnesota Certification IDs1700 Elm Street SE Suite 200, Minneapolis, MN 55414A2LA Certification #: 2926.01 Alaska Certification #: UST-078Alaska Certification #MN00064Arizona Certification #: AZ-0014Arkansas Certification #: 88-0680California Certification #: 01155CA EPA Region 8 Certification #: PaceFlorida/NELAP Certification #: E87605Georgia Certification #: 959Idaho Certification #: MN00064Illinois Certification #: 200011 Iowa Certification #: 368Kansas Certification #: E-10167Louisiana Certification #: 03086Louisiana Certification #: LA080009Maine Certification #: 2007029 Maryland Certification #: 322Michigan DEQ Certification #: 9909Minnesota Certification #: 027-053-137 Mississippi Certification #: PaceMontana Certification #: MT CERT0092 Nevada Certification #: MN_00064Nebraska Certification #: PaceNew Jersey Certification #: MN-002New Mexico Certification #: PaceNew York Certification #: 11647 North Carolina Certification #: 530North Dakota Certification #: R-036North Dakota Certification #: R-036AOhio VAP Certification #: CL101Oklahoma Certification #: D9921 Oklahoma Certification #: 9507Oregon Certification #: MN200001Pennsylvania Certification #: 68-00563Puerto Rico CertificationTennessee Certification #: 02818 Texas Certification #: T104704192Washington Certification #: C754Wisconsin Certification #: 999407970 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 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 SAMPLE ANALYTE COUNT Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Lab ID Sample ID Method Analytes Reported LaboratoryAnalysts 9299107001 PCSG-1 Method 3C Gases 1 PASI-MRTP TO-15 58 PASI-MDR1 9299107002 PCSG-2 Method 3C Gases 1 PASI-MRTP TO-15 58 PASI-MDR1 9299107003 PCSG-3 Method 3C Gases 1 PASI-MRTP TO-15 58 PASI-MDR1 9299107004 AA-1 Method 3C Gases 1 PASI-MRTP TO-15 58 PASI-MDR1 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 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 ANALYTICAL RESULTS Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Sample:PCSG-1 Lab ID:9299107001 Collected:07/21/11 15:59 Received:07/27/11 08:55 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Method 3C AIR - Fixed Gases Analytical Method: Method 3C Gases Helium 1.6J %0.89 08/04/11 10:32 7440-59-73.2 TO15 MSV AIR Analytical Method: TO-15 Acetone 192 ug/m3 1.34 08/02/11 23:20 67-64-1 E0.64 Benzene 1.2 ug/m3 1.34 08/02/11 23:20 71-43-20.44 Bromodichloromethane ND ug/m3 1.34 08/02/11 23:20 75-27-41.9 Bromoform ND ug/m3 1.34 08/02/11 23:20 75-25-22.8 Bromomethane ND ug/m3 1.34 08/02/11 23:20 74-83-91.1 1,3-Butadiene ND ug/m3 1.34 08/02/11 23:20 106-99-00.60 2-Butanone (MEK)13.2 ug/m3 1.34 08/02/11 23:20 78-93-30.80 Carbon disulfide 6.5 ug/m3 1.34 08/02/11 23:20 75-15-00.84 Carbon tetrachloride ND ug/m3 1.34 08/02/11 23:20 56-23-50.86 Chlorobenzene ND ug/m3 1.34 08/02/11 23:20 108-90-71.3 Chloroethane ND ug/m3 1.34 08/02/11 23:20 75-00-30.72 Chloroform ND ug/m3 1.34 08/02/11 23:20 67-66-31.3 Chloromethane ND ug/m3 1.34 08/02/11 23:20 74-87-30.56 Cyclohexane 6.5 ug/m3 1.34 08/02/11 23:20 110-82-70.91 Dibromochloromethane ND ug/m3 1.34 08/02/11 23:20 124-48-12.3 1,2-Dibromoethane (EDB)ND ug/m3 1.34 08/02/11 23:20 106-93-42.1 1,2-Dichlorobenzene ND ug/m3 1.34 08/02/11 23:20 95-50-11.6 1,3-Dichlorobenzene ND ug/m3 1.34 08/02/11 23:20 541-73-11.6 1,4-Dichlorobenzene ND ug/m3 1.34 08/02/11 23:20 106-46-71.6 Dichlorodifluoromethane ND ug/m3 1.34 08/02/11 23:20 75-71-81.3 1,1-Dichloroethane ND ug/m3 1.34 08/02/11 23:20 75-34-31.1 1,2-Dichloroethane ND ug/m3 1.34 08/02/11 23:20 107-06-20.55 1,1-Dichloroethene ND ug/m3 1.34 08/02/11 23:20 75-35-41.1 cis-1,2-Dichloroethene ND ug/m3 1.34 08/02/11 23:20 156-59-21.1 trans-1,2-Dichloroethene ND ug/m3 1.34 08/02/11 23:20 156-60-51.1 1,2-Dichloropropane ND ug/m3 1.34 08/02/11 23:20 78-87-51.3 cis-1,3-Dichloropropene ND ug/m3 1.34 08/02/11 23:20 10061-01-51.2 trans-1,3-Dichloropropene ND ug/m3 1.34 08/02/11 23:20 10061-02-61.2 Dichlorotetrafluoroethane ND ug/m3 1.34 08/02/11 23:20 76-14-21.9 Ethyl acetate 26.6 ug/m3 1.34 08/02/11 23:20 141-78-60.98 Ethylbenzene 2.6 ug/m3 1.34 08/02/11 23:20 100-41-41.2 4-Ethyltoluene ND ug/m3 1.34 08/02/11 23:20 622-96-83.4 n-Heptane ND ug/m3 1.34 08/02/11 23:20 142-82-51.1 Hexachloro-1,3-butadiene ND ug/m3 1.34 08/02/11 23:20 87-68-32.9 n-Hexane 107 ug/m3 1.34 08/02/11 23:20 110-54-30.96 2-Hexanone ND ug/m3 1.34 08/02/11 23:20 591-78-61.1 Methylene Chloride 73.2 ug/m3 1.34 08/02/11 23:20 75-09-20.95 4-Methyl-2-pentanone (MIBK)1.6 ug/m3 1.34 08/02/11 23:20 108-10-11.1 Methyl-tert-butyl ether ND ug/m3 1.34 08/02/11 23:20 1634-04-40.98 Naphthalene 6.5 ug/m3 1.34 08/02/11 23:20 91-20-33.6 Propylene ND ug/m3 1.34 08/02/11 23:20 115-07-10.47 Styrene ND ug/m3 1.34 08/02/11 23:20 100-42-51.2 1,1,2,2-Tetrachloroethane ND ug/m3 1.34 08/02/11 23:20 79-34-50.94 Tetrachloroethene 8.0 ug/m3 1.34 08/02/11 23:20 127-18-40.92 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 4 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 ANALYTICAL RESULTS Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Sample:PCSG-1 Lab ID:9299107001 Collected:07/21/11 15:59 Received:07/27/11 08:55 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit TO15 MSV AIR Analytical Method: TO-15 Tetrahydrofuran ND ug/m3 1.34 08/02/11 23:20 109-99-90.80 Toluene 137 ug/m3 1.34 08/02/11 23:20 108-88-31.0 1,2,4-Trichlorobenzene ND ug/m3 1.34 08/02/11 23:20 120-82-11.3 1,1,1-Trichloroethane ND ug/m3 1.34 08/02/11 23:20 71-55-61.5 1,1,2-Trichloroethane ND ug/m3 1.34 08/02/11 23:20 79-00-50.74 Trichloroethene 1.1 ug/m3 1.34 08/02/11 23:20 79-01-60.74 Trichlorofluoromethane 1.6 ug/m3 1.34 08/02/11 23:20 75-69-41.5 1,1,2-Trichlorotrifluoroethane ND ug/m3 1.34 08/02/11 23:20 76-13-12.1 1,2,4-Trimethylbenzene 4.1 ug/m3 1.34 08/02/11 23:20 95-63-61.3 1,3,5-Trimethylbenzene ND ug/m3 1.34 08/02/11 23:20 108-67-81.3 Vinyl acetate ND ug/m3 1.34 08/02/11 23:20 108-05-40.95 Vinyl chloride ND ug/m3 1.34 08/02/11 23:20 75-01-40.35 m&p-Xylene 8.3 ug/m3 1.34 08/02/11 23:20 179601-23-12.4 o-Xylene 2.6 ug/m3 1.34 08/02/11 23:20 95-47-61.2 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 5 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 ANALYTICAL RESULTS Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Sample:PCSG-2 Lab ID:9299107002 Collected:07/21/11 17:41 Received:07/27/11 08:55 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Method 3C AIR - Fixed Gases Analytical Method: Method 3C Gases Helium ND %1.18 08/04/11 10:42 7440-59-74.2 TO15 MSV AIR Analytical Method: TO-15 Acetone 81.5 ug/m3 1.48 08/02/11 23:50 67-64-10.71 Benzene ND ug/m3 1.48 08/02/11 23:50 71-43-20.48 Bromodichloromethane ND ug/m3 1.48 08/02/11 23:50 75-27-42.1 Bromoform ND ug/m3 1.48 08/02/11 23:50 75-25-23.1 Bromomethane ND ug/m3 1.48 08/02/11 23:50 74-83-91.2 1,3-Butadiene ND ug/m3 1.48 08/02/11 23:50 106-99-00.67 2-Butanone (MEK)15.0 ug/m3 1.48 08/02/11 23:50 78-93-30.89 Carbon disulfide 4.6 ug/m3 1.48 08/02/11 23:50 75-15-00.93 Carbon tetrachloride ND ug/m3 1.48 08/02/11 23:50 56-23-50.95 Chlorobenzene ND ug/m3 1.48 08/02/11 23:50 108-90-71.4 Chloroethane ND ug/m3 1.48 08/02/11 23:50 75-00-30.80 Chloroform 29.5 ug/m3 1.48 08/02/11 23:50 67-66-31.5 Chloromethane ND ug/m3 1.48 08/02/11 23:50 74-87-30.62 Cyclohexane ND ug/m3 1.48 08/02/11 23:50 110-82-71.0 Dibromochloromethane ND ug/m3 1.48 08/02/11 23:50 124-48-12.5 1,2-Dibromoethane (EDB)ND ug/m3 1.48 08/02/11 23:50 106-93-42.4 1,2-Dichlorobenzene ND ug/m3 1.48 08/02/11 23:50 95-50-11.8 1,3-Dichlorobenzene ND ug/m3 1.48 08/02/11 23:50 541-73-11.8 1,4-Dichlorobenzene ND ug/m3 1.48 08/02/11 23:50 106-46-71.8 Dichlorodifluoromethane ND ug/m3 1.48 08/02/11 23:50 75-71-81.5 1,1-Dichloroethane ND ug/m3 1.48 08/02/11 23:50 75-34-31.2 1,2-Dichloroethane ND ug/m3 1.48 08/02/11 23:50 107-06-20.61 1,1-Dichloroethene ND ug/m3 1.48 08/02/11 23:50 75-35-41.2 cis-1,2-Dichloroethene ND ug/m3 1.48 08/02/11 23:50 156-59-21.2 trans-1,2-Dichloroethene ND ug/m3 1.48 08/02/11 23:50 156-60-51.2 1,2-Dichloropropane ND ug/m3 1.48 08/02/11 23:50 78-87-51.4 cis-1,3-Dichloropropene ND ug/m3 1.48 08/02/11 23:50 10061-01-51.4 trans-1,3-Dichloropropene ND ug/m3 1.48 08/02/11 23:50 10061-02-61.4 Dichlorotetrafluoroethane ND ug/m3 1.48 08/02/11 23:50 76-14-22.1 Ethyl acetate ND ug/m3 1.48 08/02/11 23:50 141-78-61.1 Ethylbenzene ND ug/m3 1.48 08/02/11 23:50 100-41-41.3 4-Ethyltoluene ND ug/m3 1.48 08/02/11 23:50 622-96-83.7 n-Heptane ND ug/m3 1.48 08/02/11 23:50 142-82-51.2 Hexachloro-1,3-butadiene ND ug/m3 1.48 08/02/11 23:50 87-68-33.3 n-Hexane 141 ug/m3 1.48 08/02/11 23:50 110-54-31.1 2-Hexanone ND ug/m3 1.48 08/02/11 23:50 591-78-61.2 Methylene Chloride 3.4 ug/m3 1.48 08/02/11 23:50 75-09-21.1 4-Methyl-2-pentanone (MIBK)ND ug/m3 1.48 08/02/11 23:50 108-10-11.2 Methyl-tert-butyl ether ND ug/m3 1.48 08/02/11 23:50 1634-04-41.1 Naphthalene 5.0 ug/m3 1.48 08/02/11 23:50 91-20-34.0 Propylene ND ug/m3 1.48 08/02/11 23:50 115-07-10.52 Styrene ND ug/m3 1.48 08/02/11 23:50 100-42-51.3 1,1,2,2-Tetrachloroethane ND ug/m3 1.48 08/02/11 23:50 79-34-51.0 Tetrachloroethene ND ug/m3 1.48 08/02/11 23:50 127-18-41.0 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 6 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 ANALYTICAL RESULTS Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Sample:PCSG-2 Lab ID:9299107002 Collected:07/21/11 17:41 Received:07/27/11 08:55 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit TO15 MSV AIR Analytical Method: TO-15 Tetrahydrofuran ND ug/m3 1.48 08/02/11 23:50 109-99-90.89 Toluene 569 ug/m3 19.83 08/03/11 12:40 108-88-315.3 1,2,4-Trichlorobenzene ND ug/m3 1.48 08/02/11 23:50 120-82-11.5 1,1,1-Trichloroethane ND ug/m3 1.48 08/02/11 23:50 71-55-61.6 1,1,2-Trichloroethane ND ug/m3 1.48 08/02/11 23:50 79-00-50.81 Trichloroethene ND ug/m3 1.48 08/02/11 23:50 79-01-60.81 Trichlorofluoromethane ND ug/m3 1.48 08/02/11 23:50 75-69-41.6 1,1,2-Trichlorotrifluoroethane ND ug/m3 1.48 08/02/11 23:50 76-13-12.4 1,2,4-Trimethylbenzene ND ug/m3 1.48 08/02/11 23:50 95-63-61.5 1,3,5-Trimethylbenzene ND ug/m3 1.48 08/02/11 23:50 108-67-81.5 Vinyl acetate ND ug/m3 1.48 08/02/11 23:50 108-05-41.1 Vinyl chloride ND ug/m3 1.48 08/02/11 23:50 75-01-40.38 m&p-Xylene 3.7 ug/m3 1.48 08/02/11 23:50 179601-23-12.6 o-Xylene ND ug/m3 1.48 08/02/11 23:50 95-47-61.3 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 7 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 ANALYTICAL RESULTS Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Sample:PCSG-3 Lab ID:9299107003 Collected:07/21/11 19:00 Received:07/27/11 08:55 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Method 3C AIR - Fixed Gases Analytical Method: Method 3C Gases Helium 1.2J %0.69 08/04/11 10:51 7440-59-72.5 TO15 MSV AIR Analytical Method: TO-15 Acetone 81.5 ug/m3 1.34 08/03/11 13:09 67-64-10.64 Benzene ND ug/m3 1.34 08/03/11 13:09 71-43-20.44 Bromodichloromethane ND ug/m3 1.34 08/03/11 13:09 75-27-41.9 Bromoform ND ug/m3 1.34 08/03/11 13:09 75-25-22.8 Bromomethane ND ug/m3 1.34 08/03/11 13:09 74-83-91.1 1,3-Butadiene ND ug/m3 1.34 08/03/11 13:09 106-99-00.60 2-Butanone (MEK)3.8 ug/m3 1.34 08/03/11 13:09 78-93-30.80 Carbon disulfide 3.6 ug/m3 1.34 08/03/11 13:09 75-15-00.84 Carbon tetrachloride ND ug/m3 1.34 08/03/11 13:09 56-23-50.86 Chlorobenzene ND ug/m3 1.34 08/03/11 13:09 108-90-71.3 Chloroethane ND ug/m3 1.34 08/03/11 13:09 75-00-30.72 Chloroform ND ug/m3 1.34 08/03/11 13:09 67-66-31.3 Chloromethane ND ug/m3 1.34 08/03/11 13:09 74-87-30.56 Cyclohexane ND ug/m3 1.34 08/03/11 13:09 110-82-70.91 Dibromochloromethane ND ug/m3 1.34 08/03/11 13:09 124-48-12.3 1,2-Dibromoethane (EDB)ND ug/m3 1.34 08/03/11 13:09 106-93-42.1 1,2-Dichlorobenzene ND ug/m3 1.34 08/03/11 13:09 95-50-11.6 1,3-Dichlorobenzene ND ug/m3 1.34 08/03/11 13:09 541-73-11.6 1,4-Dichlorobenzene ND ug/m3 1.34 08/03/11 13:09 106-46-71.6 Dichlorodifluoromethane ND ug/m3 1.34 08/03/11 13:09 75-71-81.3 1,1-Dichloroethane ND ug/m3 1.34 08/03/11 13:09 75-34-31.1 1,2-Dichloroethane ND ug/m3 1.34 08/03/11 13:09 107-06-20.55 1,1-Dichloroethene ND ug/m3 1.34 08/03/11 13:09 75-35-41.1 cis-1,2-Dichloroethene ND ug/m3 1.34 08/03/11 13:09 156-59-21.1 trans-1,2-Dichloroethene ND ug/m3 1.34 08/03/11 13:09 156-60-51.1 1,2-Dichloropropane ND ug/m3 1.34 08/03/11 13:09 78-87-51.3 cis-1,3-Dichloropropene ND ug/m3 1.34 08/03/11 13:09 10061-01-51.2 trans-1,3-Dichloropropene ND ug/m3 1.34 08/03/11 13:09 10061-02-61.2 Dichlorotetrafluoroethane ND ug/m3 1.34 08/03/11 13:09 76-14-21.9 Ethyl acetate ND ug/m3 1.34 08/03/11 13:09 141-78-60.98 Ethylbenzene ND ug/m3 1.34 08/03/11 13:09 100-41-41.2 4-Ethyltoluene ND ug/m3 1.34 08/03/11 13:09 622-96-83.4 n-Heptane ND ug/m3 1.34 08/03/11 13:09 142-82-51.1 Hexachloro-1,3-butadiene ND ug/m3 1.34 08/03/11 13:09 87-68-32.9 n-Hexane 2.7 ug/m3 1.34 08/03/11 13:09 110-54-30.96 2-Hexanone ND ug/m3 1.34 08/03/11 13:09 591-78-61.1 Methylene Chloride 3.6 ug/m3 1.34 08/03/11 13:09 75-09-20.95 4-Methyl-2-pentanone (MIBK)ND ug/m3 1.34 08/03/11 13:09 108-10-11.1 Methyl-tert-butyl ether ND ug/m3 1.34 08/03/11 13:09 1634-04-40.98 Naphthalene 9.7 ug/m3 1.34 08/03/11 13:09 91-20-3 CH3.6 Propylene ND ug/m3 1.34 08/03/11 13:09 115-07-10.47 Styrene ND ug/m3 1.34 08/03/11 13:09 100-42-51.2 1,1,2,2-Tetrachloroethane ND ug/m3 1.34 08/03/11 13:09 79-34-50.94 Tetrachloroethene 4.8 ug/m3 1.34 08/03/11 13:09 127-18-40.92 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 8 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 ANALYTICAL RESULTS Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Sample:PCSG-3 Lab ID:9299107003 Collected:07/21/11 19:00 Received:07/27/11 08:55 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit TO15 MSV AIR Analytical Method: TO-15 Tetrahydrofuran 9.0 ug/m3 1.34 08/03/11 13:09 109-99-9 SS0.80 Toluene 3.8 ug/m3 1.34 08/03/11 13:09 108-88-31.0 1,2,4-Trichlorobenzene ND ug/m3 1.34 08/03/11 13:09 120-82-11.3 1,1,1-Trichloroethane ND ug/m3 1.34 08/03/11 13:09 71-55-61.5 1,1,2-Trichloroethane ND ug/m3 1.34 08/03/11 13:09 79-00-50.74 Trichloroethene ND ug/m3 1.34 08/03/11 13:09 79-01-60.74 Trichlorofluoromethane ND ug/m3 1.34 08/03/11 13:09 75-69-41.5 1,1,2-Trichlorotrifluoroethane ND ug/m3 1.34 08/03/11 13:09 76-13-12.1 1,2,4-Trimethylbenzene ND ug/m3 1.34 08/03/11 13:09 95-63-61.3 1,3,5-Trimethylbenzene ND ug/m3 1.34 08/03/11 13:09 108-67-81.3 Vinyl acetate ND ug/m3 1.34 08/03/11 13:09 108-05-40.95 Vinyl chloride ND ug/m3 1.34 08/03/11 13:09 75-01-40.35 m&p-Xylene ND ug/m3 1.34 08/03/11 13:09 179601-23-12.4 o-Xylene ND ug/m3 1.34 08/03/11 13:09 95-47-61.2 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 9 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 ANALYTICAL RESULTS Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Sample:AA-1 Lab ID:9299107004 Collected:07/21/11 17:00 Received:07/27/11 08:55 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit Method 3C AIR - Fixed Gases Analytical Method: Method 3C Gases Helium ND %0.95 08/04/11 11:24 7440-59-73.4 TO15 MSV AIR Analytical Method: TO-15 Acetone 523 ug/m3 13.4 08/03/11 12:11 67-64-16.4 Benzene 3.3 ug/m3 1.34 08/03/11 00:48 71-43-20.44 Bromodichloromethane ND ug/m3 1.34 08/03/11 00:48 75-27-41.9 Bromoform ND ug/m3 1.34 08/03/11 00:48 75-25-22.8 Bromomethane ND ug/m3 1.34 08/03/11 00:48 74-83-91.1 1,3-Butadiene ND ug/m3 1.34 08/03/11 00:48 106-99-00.60 2-Butanone (MEK)33.8 ug/m3 1.34 08/03/11 00:48 78-93-30.80 Carbon disulfide 0.85 ug/m3 1.34 08/03/11 00:48 75-15-00.84 Carbon tetrachloride ND ug/m3 1.34 08/03/11 00:48 56-23-50.86 Chlorobenzene ND ug/m3 1.34 08/03/11 00:48 108-90-71.3 Chloroethane ND ug/m3 1.34 08/03/11 00:48 75-00-30.72 Chloroform ND ug/m3 1.34 08/03/11 00:48 67-66-31.3 Chloromethane ND ug/m3 1.34 08/03/11 00:48 74-87-30.56 Cyclohexane 11.8 ug/m3 1.34 08/03/11 00:48 110-82-70.91 Dibromochloromethane ND ug/m3 1.34 08/03/11 00:48 124-48-12.3 1,2-Dibromoethane (EDB)ND ug/m3 1.34 08/03/11 00:48 106-93-42.1 1,2-Dichlorobenzene ND ug/m3 1.34 08/03/11 00:48 95-50-11.6 1,3-Dichlorobenzene ND ug/m3 1.34 08/03/11 00:48 541-73-11.6 1,4-Dichlorobenzene ND ug/m3 1.34 08/03/11 00:48 106-46-71.6 Dichlorodifluoromethane ND ug/m3 1.34 08/03/11 00:48 75-71-81.3 1,1-Dichloroethane ND ug/m3 1.34 08/03/11 00:48 75-34-31.1 1,2-Dichloroethane ND ug/m3 1.34 08/03/11 00:48 107-06-20.55 1,1-Dichloroethene ND ug/m3 1.34 08/03/11 00:48 75-35-41.1 cis-1,2-Dichloroethene ND ug/m3 1.34 08/03/11 00:48 156-59-21.1 trans-1,2-Dichloroethene ND ug/m3 1.34 08/03/11 00:48 156-60-51.1 1,2-Dichloropropane ND ug/m3 1.34 08/03/11 00:48 78-87-51.3 cis-1,3-Dichloropropene ND ug/m3 1.34 08/03/11 00:48 10061-01-51.2 trans-1,3-Dichloropropene ND ug/m3 1.34 08/03/11 00:48 10061-02-61.2 Dichlorotetrafluoroethane ND ug/m3 1.34 08/03/11 00:48 76-14-21.9 Ethyl acetate ND ug/m3 1.34 08/03/11 00:48 141-78-60.98 Ethylbenzene 8.1 ug/m3 1.34 08/03/11 00:48 100-41-41.2 4-Ethyltoluene 7.9 ug/m3 1.34 08/03/11 00:48 622-96-83.4 n-Heptane 33.5 ug/m3 1.34 08/03/11 00:48 142-82-51.1 Hexachloro-1,3-butadiene ND ug/m3 1.34 08/03/11 00:48 87-68-32.9 n-Hexane 196 ug/m3 13.4 08/03/11 12:11 110-54-39.6 2-Hexanone ND ug/m3 1.34 08/03/11 00:48 591-78-61.1 Methylene Chloride 1.2 ug/m3 1.34 08/03/11 00:48 75-09-20.95 4-Methyl-2-pentanone (MIBK)6.7 ug/m3 1.34 08/03/11 00:48 108-10-11.1 Methyl-tert-butyl ether ND ug/m3 1.34 08/03/11 00:48 1634-04-40.98 Naphthalene 34.0 ug/m3 1.34 08/03/11 00:48 91-20-33.6 Propylene ND ug/m3 1.34 08/03/11 00:48 115-07-10.47 Styrene ND ug/m3 1.34 08/03/11 00:48 100-42-51.2 1,1,2,2-Tetrachloroethane ND ug/m3 1.34 08/03/11 00:48 79-34-50.94 Tetrachloroethene ND ug/m3 1.34 08/03/11 00:48 127-18-40.92 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 10 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 ANALYTICAL RESULTS Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Sample:AA-1 Lab ID:9299107004 Collected:07/21/11 17:00 Received:07/27/11 08:55 Matrix:Air Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit TO15 MSV AIR Analytical Method: TO-15 Tetrahydrofuran ND ug/m3 1.34 08/03/11 00:48 109-99-90.80 Toluene 466 ug/m3 13.4 08/03/11 12:11 108-88-310.3 1,2,4-Trichlorobenzene ND ug/m3 1.34 08/03/11 00:48 120-82-11.3 1,1,1-Trichloroethane ND ug/m3 1.34 08/03/11 00:48 71-55-61.5 1,1,2-Trichloroethane ND ug/m3 1.34 08/03/11 00:48 79-00-50.74 Trichloroethene ND ug/m3 1.34 08/03/11 00:48 79-01-60.74 Trichlorofluoromethane ND ug/m3 1.34 08/03/11 00:48 75-69-41.5 1,1,2-Trichlorotrifluoroethane ND ug/m3 1.34 08/03/11 00:48 76-13-12.1 1,2,4-Trimethylbenzene 37.8 ug/m3 1.34 08/03/11 00:48 95-63-61.3 1,3,5-Trimethylbenzene 8.1 ug/m3 1.34 08/03/11 00:48 108-67-81.3 Vinyl acetate ND ug/m3 1.34 08/03/11 00:48 108-05-40.95 Vinyl chloride ND ug/m3 1.34 08/03/11 00:48 75-01-40.35 m&p-Xylene 27.9 ug/m3 1.34 08/03/11 00:48 179601-23-12.4 o-Xylene 10.8 ug/m3 1.34 08/03/11 00:48 95-47-61.2 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 11 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 QUALITY CONTROL DATA Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG QC Batch: QC Batch Method: Analysis Method: Analysis Description: AIR/12870 Method 3C Gases Method 3C Gases METHOD 3C AIR - FIXED GASES Associated Lab Samples:9299107001, 9299107002, 9299107003, 9299107004 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:1026438 Associated Lab Samples:9299107001, 9299107002, 9299107003, 9299107004 Matrix:Air Analyzed Helium %2.0J 3.6 08/04/11 09:21 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 1026439LABORATORY CONTROL SAMPLE & LCSD: LCSSpike LCSD % Rec RPD Max RPD LCSD Result 1026440 Helium %15.718 87 70-1309316.7 6 30 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 12 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 QUALITY CONTROL DATA Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG QC Batch: QC Batch Method: Analysis Method: Analysis Description: AIR/12850 TO-15 TO-15 TO15 MSV AIR Low Level Associated Lab Samples:9299107001, 9299107002, 9299107004 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:1025047 Associated Lab Samples:9299107001, 9299107002, 9299107004 Matrix:Air Analyzed 1,1,1-Trichloroethane ug/m3 ND 1.1 08/02/11 09:25 1,1,2,2-Tetrachloroethane ug/m3 ND 0.70 08/02/11 09:25 1,1,2-Trichloroethane ug/m3 ND 0.55 08/02/11 09:25 1,1,2-Trichlorotrifluoroethane ug/m3 ND 1.6 08/02/11 09:25 1,1-Dichloroethane ug/m3 ND 0.82 08/02/11 09:25 1,1-Dichloroethene ug/m3 ND 0.81 08/02/11 09:25 1,2,4-Trichlorobenzene ug/m3 ND 0.99 08/02/11 09:25 1,2,4-Trimethylbenzene ug/m3 ND 1.0 08/02/11 09:25 1,2-Dibromoethane (EDB)ug/m3 ND 1.6 08/02/11 09:25 1,2-Dichlorobenzene ug/m3 ND 1.2 08/02/11 09:25 1,2-Dichloroethane ug/m3 ND 0.41 08/02/11 09:25 1,2-Dichloropropane ug/m3 ND 0.94 08/02/11 09:25 1,3,5-Trimethylbenzene ug/m3 ND 1.0 08/02/11 09:25 1,3-Butadiene ug/m3 ND 0.45 08/02/11 09:25 1,3-Dichlorobenzene ug/m3 ND 1.2 08/02/11 09:25 1,4-Dichlorobenzene ug/m3 ND 1.2 08/02/11 09:25 2-Butanone (MEK)ug/m3 ND 0.60 08/02/11 09:25 2-Hexanone ug/m3 ND 0.83 08/02/11 09:25 4-Ethyltoluene ug/m3 ND 2.5 08/02/11 09:25 4-Methyl-2-pentanone (MIBK)ug/m3 ND 0.83 08/02/11 09:25 Acetone ug/m3 ND 0.48 08/02/11 09:25 Benzene ug/m3 ND 0.32 08/02/11 09:25 Bromodichloromethane ug/m3 ND 1.4 08/02/11 09:25 Bromoform ug/m3 ND 2.1 08/02/11 09:25 Bromomethane ug/m3 ND 0.79 08/02/11 09:25 Carbon disulfide ug/m3 ND 0.63 08/02/11 09:25 Carbon tetrachloride ug/m3 ND 0.64 08/02/11 09:25 Chlorobenzene ug/m3 ND 0.94 08/02/11 09:25 Chloroethane ug/m3 ND 0.54 08/02/11 09:25 Chloroform ug/m3 ND 0.99 08/02/11 09:25 Chloromethane ug/m3 ND 0.42 08/02/11 09:25 cis-1,2-Dichloroethene ug/m3 ND 0.81 08/02/11 09:25 cis-1,3-Dichloropropene ug/m3 ND 0.92 08/02/11 09:25 Cyclohexane ug/m3 ND 0.68 08/02/11 09:25 Dibromochloromethane ug/m3 ND 1.7 08/02/11 09:25 Dichlorodifluoromethane ug/m3 ND 1.0 08/02/11 09:25 Dichlorotetrafluoroethane ug/m3 ND 1.4 08/02/11 09:25 Ethyl acetate ug/m3 ND 0.73 08/02/11 09:25 Ethylbenzene ug/m3 ND 0.88 08/02/11 09:25 Hexachloro-1,3-butadiene ug/m3 ND 2.2 08/02/11 09:25 m&p-Xylene ug/m3 ND 1.8 08/02/11 09:25 Methyl-tert-butyl ether ug/m3 ND 0.73 08/02/11 09:25 Methylene Chloride ug/m3 ND 0.71 08/02/11 09:25 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 13 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 QUALITY CONTROL DATA Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:1025047 Associated Lab Samples:9299107001, 9299107002, 9299107004 Matrix:Air Analyzed n-Heptane ug/m3 ND 0.83 08/02/11 09:25 n-Hexane ug/m3 ND 0.72 08/02/11 09:25 Naphthalene ug/m3 ND 2.7 08/02/11 09:25 o-Xylene ug/m3 ND 0.88 08/02/11 09:25 Propylene ug/m3 ND 0.35 08/02/11 09:25 Styrene ug/m3 ND 0.87 08/02/11 09:25 Tetrachloroethene ug/m3 ND 0.69 08/02/11 09:25 Tetrahydrofuran ug/m3 ND 0.60 08/02/11 09:25 Toluene ug/m3 ND 0.77 08/02/11 09:25 trans-1,2-Dichloroethene ug/m3 ND 0.81 08/02/11 09:25 trans-1,3-Dichloropropene ug/m3 ND 0.92 08/02/11 09:25 Trichloroethene ug/m3 ND 0.55 08/02/11 09:25 Trichlorofluoromethane ug/m3 ND 1.1 08/02/11 09:25 Vinyl acetate ug/m3 ND 0.71 08/02/11 09:25 Vinyl chloride ug/m3 ND 0.26 08/02/11 09:25 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 1025048LABORATORY CONTROL SAMPLE: LCSSpike 1,1,1-Trichloroethane ug/m3 60.055.5 108 66-133 1,1,2,2-Tetrachloroethane ug/m3 72.869.8 104 70-140 1,1,2-Trichloroethane ug/m3 59.655.5 107 68-132 1,1,2-Trichlorotrifluoroethane ug/m3 77.277.9 99 60-137 1,1-Dichloroethane ug/m3 43.041.2 104 65-131 1,1-Dichloroethene ug/m3 43.840.3 109 65-132 1,2,4-Trichlorobenzene ug/m3 113 CH75.5 150 30-150 1,2,4-Trimethylbenzene ug/m3 54.150 108 69-140 1,2-Dibromoethane (EDB)ug/m3 81.678.1 104 71-139 1,2-Dichlorobenzene ug/m3 71.161.2 116 68-139 1,2-Dichloroethane ug/m3 45.141.2 110 66-132 1,2-Dichloropropane ug/m3 50.247 107 69-130 1,3,5-Trimethylbenzene ug/m3 53.650 107 70-141 1,3-Butadiene ug/m3 23.822.5 106 68-128 1,3-Dichlorobenzene ug/m3 69.661.2 114 66-146 1,4-Dichlorobenzene ug/m3 66.461.2 109 66-142 2-Butanone (MEK)ug/m3 30.830 103 68-134 2-Hexanone ug/m3 42.341.7 101 70-144 4-Ethyltoluene ug/m3 55.050 110 65-145 4-Methyl-2-pentanone (MIBK)ug/m3 42.641.7 102 70-139 Acetone ug/m3 26.024.2 107 56-142 Benzene ug/m3 36.032.5 111 69-129 Bromodichloromethane ug/m3 73.468.2 108 70-130 Bromoform ug/m3 118105 113 67-147 Bromomethane ug/m3 40.739.5 103 67-127 Carbon disulfide ug/m3 32.931.7 104 65-131 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 14 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 QUALITY CONTROL DATA Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 1025048LABORATORY CONTROL SAMPLE: LCSSpike Carbon tetrachloride ug/m3 61.964 97 62-137 Chlorobenzene ug/m3 50.146.8 107 72-133 Chloroethane ug/m3 29.826.8 111 66-127 Chloroform ug/m3 53.849.7 108 67-130 Chloromethane ug/m3 24.521 117 63-127 cis-1,2-Dichloroethene ug/m3 42.340.3 105 69-130 cis-1,3-Dichloropropene ug/m3 47.246.2 102 74-137 Cyclohexane ug/m3 35.135 100 69-137 Dibromochloromethane ug/m3 93.786.6 108 69-140 Dichlorodifluoromethane ug/m3 56.150.3 112 62-131 Dichlorotetrafluoroethane ug/m3 67.271.1 94 63-130 Ethyl acetate ug/m3 39.036.6 107 70-135 Ethylbenzene ug/m3 49.044.2 111 71-141 Hexachloro-1,3-butadiene ug/m3 176 CH,L3,SS10816330-150 m&p-Xylene ug/m3 89.388.3 101 68-144 Methyl-tert-butyl ether ug/m3 39.136.7 107 54-136 Methylene Chloride ug/m3 37.235.3 105 56-143 n-Heptane ug/m3 44.841.7 108 72-130 n-Hexane ug/m3 39.035.8 109 68-130 Naphthalene ug/m3 77.3 CH53.3 145 30-150 o-Xylene ug/m3 48.244.2 109 70-141 Propylene ug/m3 17.817.5 102 61-139 Styrene ug/m3 48.143.3 111 68-145 Tetrachloroethene ug/m3 79.269 115 64-142 Tetrahydrofuran ug/m3 28.4 SS309570-134 Toluene ug/m3 42.238.3 110 69-133 trans-1,2-Dichloroethene ug/m3 42.040.3 104 64-132 trans-1,3-Dichloropropene ug/m3 46.246.2 100 71-140 Trichloroethene ug/m3 60.054.6 110 68-132 Trichlorofluoromethane ug/m3 58.257.1 102 59-136 Vinyl acetate ug/m3 37.535.8 105 70-142 Vinyl chloride ug/m3 29.826 115 64-129 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 15 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 QUALITY CONTROL DATA Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG QC Batch: QC Batch Method: Analysis Method: Analysis Description: AIR/12863 TO-15 TO-15 TO15 MSV AIR Low Level Associated Lab Samples:9299107003 Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:1025912 Associated Lab Samples:9299107003 Matrix:Air Analyzed 1,1,1-Trichloroethane ug/m3 ND 1.1 08/03/11 09:16 1,1,2,2-Tetrachloroethane ug/m3 ND 0.70 08/03/11 09:16 1,1,2-Trichloroethane ug/m3 ND 0.55 08/03/11 09:16 1,1,2-Trichlorotrifluoroethane ug/m3 ND 1.6 08/03/11 09:16 1,1-Dichloroethane ug/m3 ND 0.82 08/03/11 09:16 1,1-Dichloroethene ug/m3 ND 0.81 08/03/11 09:16 1,2,4-Trichlorobenzene ug/m3 ND 0.99 08/03/11 09:16 1,2,4-Trimethylbenzene ug/m3 ND 1.0 08/03/11 09:16 1,2-Dibromoethane (EDB)ug/m3 ND 1.6 08/03/11 09:16 1,2-Dichlorobenzene ug/m3 ND 1.2 08/03/11 09:16 1,2-Dichloroethane ug/m3 ND 0.41 08/03/11 09:16 1,2-Dichloropropane ug/m3 ND 0.94 08/03/11 09:16 1,3,5-Trimethylbenzene ug/m3 ND 1.0 08/03/11 09:16 1,3-Butadiene ug/m3 ND 0.45 08/03/11 09:16 1,3-Dichlorobenzene ug/m3 ND 1.2 08/03/11 09:16 1,4-Dichlorobenzene ug/m3 ND 1.2 08/03/11 09:16 2-Butanone (MEK)ug/m3 ND 0.60 08/03/11 09:16 2-Hexanone ug/m3 ND 0.83 08/03/11 09:16 4-Ethyltoluene ug/m3 ND 2.5 08/03/11 09:16 4-Methyl-2-pentanone (MIBK)ug/m3 ND 0.83 08/03/11 09:16 Acetone ug/m3 ND 0.48 08/03/11 09:16 Benzene ug/m3 ND 0.32 08/03/11 09:16 Bromodichloromethane ug/m3 ND 1.4 08/03/11 09:16 Bromoform ug/m3 ND 2.1 08/03/11 09:16 Bromomethane ug/m3 ND 0.79 08/03/11 09:16 Carbon disulfide ug/m3 ND 0.63 08/03/11 09:16 Carbon tetrachloride ug/m3 ND 0.64 08/03/11 09:16 Chlorobenzene ug/m3 ND 0.94 08/03/11 09:16 Chloroethane ug/m3 ND 0.54 08/03/11 09:16 Chloroform ug/m3 ND 0.99 08/03/11 09:16 Chloromethane ug/m3 ND 0.42 08/03/11 09:16 cis-1,2-Dichloroethene ug/m3 ND 0.81 08/03/11 09:16 cis-1,3-Dichloropropene ug/m3 ND 0.92 08/03/11 09:16 Cyclohexane ug/m3 ND 0.68 08/03/11 09:16 Dibromochloromethane ug/m3 ND 1.7 08/03/11 09:16 Dichlorodifluoromethane ug/m3 ND 1.0 08/03/11 09:16 Dichlorotetrafluoroethane ug/m3 ND 1.4 08/03/11 09:16 Ethyl acetate ug/m3 ND 0.73 08/03/11 09:16 Ethylbenzene ug/m3 ND 0.88 08/03/11 09:16 Hexachloro-1,3-butadiene ug/m3 ND 2.2 08/03/11 09:16 m&p-Xylene ug/m3 ND 1.8 08/03/11 09:16 Methyl-tert-butyl ether ug/m3 ND 0.73 08/03/11 09:16 Methylene Chloride ug/m3 ND 0.71 08/03/11 09:16 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 16 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 QUALITY CONTROL DATA Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Parameter Units Blank Result Reporting Limit Qualifiers METHOD BLANK:1025912 Associated Lab Samples:9299107003 Matrix:Air Analyzed n-Heptane ug/m3 ND 0.83 08/03/11 09:16 n-Hexane ug/m3 ND 0.72 08/03/11 09:16 Naphthalene ug/m3 ND 2.7 08/03/11 09:16 o-Xylene ug/m3 ND 0.88 08/03/11 09:16 Propylene ug/m3 ND 0.35 08/03/11 09:16 Styrene ug/m3 ND 0.87 08/03/11 09:16 Tetrachloroethene ug/m3 ND 0.69 08/03/11 09:16 Tetrahydrofuran ug/m3 ND 0.60 08/03/11 09:16 Toluene ug/m3 ND 0.77 08/03/11 09:16 trans-1,2-Dichloroethene ug/m3 ND 0.81 08/03/11 09:16 trans-1,3-Dichloropropene ug/m3 ND 0.92 08/03/11 09:16 Trichloroethene ug/m3 ND 0.55 08/03/11 09:16 Trichlorofluoromethane ug/m3 ND 1.1 08/03/11 09:16 Vinyl acetate ug/m3 ND 0.71 08/03/11 09:16 Vinyl chloride ug/m3 ND 0.26 08/03/11 09:16 Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 1025913LABORATORY CONTROL SAMPLE: LCSSpike 1,1,1-Trichloroethane ug/m3 60.355.5 109 66-133 1,1,2,2-Tetrachloroethane ug/m3 73.769.8 106 70-140 1,1,2-Trichloroethane ug/m3 60.355.5 109 68-132 1,1,2-Trichlorotrifluoroethane ug/m3 82.377.9 106 60-137 1,1-Dichloroethane ug/m3 44.441.2 108 65-131 1,1-Dichloroethene ug/m3 45.040.3 112 65-132 1,2,4-Trichlorobenzene ug/m3 112 CH75.5 148 30-150 1,2,4-Trimethylbenzene ug/m3 54.750 109 69-140 1,2-Dibromoethane (EDB)ug/m3 83.078.1 106 71-139 1,2-Dichlorobenzene ug/m3 71.461.2 117 68-139 1,2-Dichloroethane ug/m3 44.341.2 108 66-132 1,2-Dichloropropane ug/m3 50.447 107 69-130 1,3,5-Trimethylbenzene ug/m3 53.950 108 70-141 1,3-Butadiene ug/m3 22.222.5 99 68-128 1,3-Dichlorobenzene ug/m3 70.561.2 115 66-146 1,4-Dichlorobenzene ug/m3 68.061.2 111 66-142 2-Butanone (MEK)ug/m3 30.530 102 68-134 2-Hexanone ug/m3 43.041.7 103 70-144 4-Ethyltoluene ug/m3 55.550 111 65-145 4-Methyl-2-pentanone (MIBK)ug/m3 42.841.7 103 70-139 Acetone ug/m3 28.424.2 117 56-142 Benzene ug/m3 36.432.5 112 69-129 Bromodichloromethane ug/m3 73.868.2 108 70-130 Bromoform ug/m3 119105 113 67-147 Bromomethane ug/m3 39.639.5 100 67-127 Carbon disulfide ug/m3 32.631.7 103 65-131 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 17 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 QUALITY CONTROL DATA Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Parameter Units LCS Result % Rec Limits Qualifiers% RecConc. 1025913LABORATORY CONTROL SAMPLE: LCSSpike Carbon tetrachloride ug/m3 62.164 97 62-137 Chlorobenzene ug/m3 51.546.8 110 72-133 Chloroethane ug/m3 29.126.8 109 66-127 Chloroform ug/m3 53.449.7 108 67-130 Chloromethane ug/m3 24.021 114 63-127 cis-1,2-Dichloroethene ug/m3 41.140.3 102 69-130 cis-1,3-Dichloropropene ug/m3 47.246.2 102 74-137 Cyclohexane ug/m3 36.235 103 69-137 Dibromochloromethane ug/m3 93.686.6 108 69-140 Dichlorodifluoromethane ug/m3 56.750.3 113 62-131 Dichlorotetrafluoroethane ug/m3 63.071.1 89 63-130 Ethyl acetate ug/m3 39.936.6 109 70-135 Ethylbenzene ug/m3 49.644.2 112 71-141 Hexachloro-1,3-butadiene ug/m3 172 CH,L3,SS10815930-150 m&p-Xylene ug/m3 91.088.3 103 68-144 Methyl-tert-butyl ether ug/m3 38.636.7 105 54-136 Methylene Chloride ug/m3 37.735.3 107 56-143 n-Heptane ug/m3 45.841.7 110 72-130 n-Hexane ug/m3 38.835.8 108 68-130 Naphthalene ug/m3 74.6 CH53.3 140 30-150 o-Xylene ug/m3 48.644.2 110 70-141 Propylene ug/m3 18.117.5 103 61-139 Styrene ug/m3 48.643.3 112 68-145 Tetrachloroethene ug/m3 78.469 114 64-142 Tetrahydrofuran ug/m3 28.4 SS309570-134 Toluene ug/m3 42.838.3 112 69-133 trans-1,2-Dichloroethene ug/m3 40.240.3 100 64-132 trans-1,3-Dichloropropene ug/m3 45.946.2 99 71-140 Trichloroethene ug/m3 58.754.6 107 68-132 Trichlorofluoromethane ug/m3 57.057.1 100 59-136 Vinyl acetate ug/m3 37.235.8 104 70-142 Vinyl chloride ug/m3 27.826 107 64-129 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 18 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 QUALIFIERS Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG 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. SG - Silica Gel - Clean-Up U - Indicates the compound was analyzed for, but not detected. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. LABORATORIES Pace Analytical Services - MinneapolisPASI-M ANALYTE QUALIFIERS The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased high.CH Analyte concentration exceeded the calibration range. The reported result is estimated.E Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias.L3 This analyte did not meet the secondary source verification criteria for the initial calibration. The reported result should be considered an estimated value.SS REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 19 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921 QUALITY CONTROL DATA CROSS REFERENCE TABLE Pace Project No.: Project: 9299107 THE PROVINCE AT UNCG Lab ID Sample ID QC Batch Method QC Batch Analytical Method Analytical Batch 9299107001 AIR/12870PCSG-1 Method 3C Gases 9299107002 AIR/12870PCSG-2 Method 3C Gases 9299107003 AIR/12870PCSG-3 Method 3C Gases 9299107004 AIR/12870AA-1 Method 3C Gases 9299107001 AIR/12850PCSG-1 TO-15 9299107002 AIR/12850PCSG-2 TO-15 9299107003 AIR/12863PCSG-3 TO-15 9299107004 AIR/12850AA-1 TO-15 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.. Date: 08/09/2011 12:23 PM Page 20 of 20 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 Pace Analytical Services, Inc. 205 East Meadow Road - Suite A Eden, NC 27288 (336)623-8921