2. September 2015 Sub-Concrete Slab Soil Investigation

Transcription

1 To: Pam Barnett, RACER Ref. No.: From: John-eric Pardys/kf/1 Date: October 30, 2015 Re: Summary of Sub-Concrete Slab Soil Investigation RACER Fredericksburg Facility Spotsylvania County, Virginia 1. Introduction GHD has prepared this memorandum to present the results of the Sub-Concrete Slab Soil Investigation conducted at the RACER Fredericksburg Facility in Spotsylvania County, Virginia (Site). The purpose of the investigation was to characterize the soils below the building. The building is approximately 285,000 square feet. The Site is located in and has a mailing address of Tidewater Trail, Fredericksburg, VA Figure 1 presents the Site Location. 2. Sub-Concrete Slab Soil Investigation On September 17, 2015, GHD met with RACER on Site to discuss the proposed work and mark the proposed investigation locations. On the morning of September 22, 2015, GHD met with the private utility locator and driller to have the locations cleared prior to initiating the investigation. Locations were adjusted as necessary. Between September 22 and 24, 2015, twenty borings were advanced to a depth of approximately 15-feet or to the water table using a geoprobe rig. The locations of the borings were spread out over the entire facility and were biased towards areas where there was a greater likelihood of contamination (i.e., equipment, machinery, etc.). Figure 2 presents the investigative locations. Attachment A presents the boring logs. Two soil samples were collected from each boring, the soil interval below the concrete slab and the interval above the water level. In addition, a third sample was collected from four of the borings at an intermediate interval based on elevated PID readings and/or visual/olfactory evidence of impacts. The samples were analyzed for the following parameters: Target Compound List (TCL) volatile organic compounds (VOCs), TCL semivolatile organic compounds (SVOCs), polychlorinated biphenyls (PCBs), and Target Analyte List (TAL) metals. GHD Services Inc. 410 Eagleview Boulevard Suite 110 Exton Pennsylvania USA T F W

2 The analytical results of the sub-concrete slab soil investigation are presented on Table 1. In order to complete a preliminary assessment, the sample results were screened against Virginia Department of Environmental Quality (VDEQ) Tier III Industrial/Commercial soil criteria, which are the lower of either the EPA Region III industrial soil risk-based criteria or the soil screening level for migration to air. Use of the Tier III screening values require residential use of the Site to be prohibited and to have a restriction prohibiting the use of groundwater unless sufficient groundwater samples have been collected to demonstrate that groundwater has not been impacted and will not be impacted in the future. There were no exceedances of the screening criteria. Attachment B presents the data validation memorandum Memo-1 2

3 SITE Source: USGS QUAD MAPS; FREDERICKSBURG AND GUINEA, VA., 1966, PHOTOREVISED ft RACER TRUST FREDERICKSBURG, VIRGINIA SUB-SLAB SOIL INVESTIGATION Oct 21, 2015 Coordinate System: VIRGINIA NORTH SP NAD83 SITE LOCATION FIGURE 1 CAD File: P:\drawings\ s\ \ corr\ (BARN001)\ (BARN001)GN\ (BARN001)GN-WA001.dwg

4 LEGEND BOREHOLE LOCATION SB-1 SB-2 SB-3 SB-4 SB-20 SB-19 SB-18 SB-6 SB-5 SB-17 SB-7 SB-16 SB-14 SB-13 SB-8 SB-15 SB-9 SB-12 SB-11 SB-10 Source: RACER TRUST, PLANT LAYOUT.ppt ft RACER TRUST FREDERICKSBURG, VIRGINIA SUB-SLAB SOIL INVESTIGATION Oct 21, 2015 Coordinate System: VIRGINIA NORTH SP NAD83 INVESTIGATIVE LOCATIONS FIGURE 2 CAD File: P:\drawings\ s\ \ corr\ (BARN001)\ (BARN001)GN\ (BARN001)GN-WA002.dwg

5 Table 1 Page 1 of 14 Soil Sub-Slab Soil Investigation SB-1 SB-1 SB-2 SB-2 SB-3 SB-3 SB-3 SO SB1(0.5-1) MD-001 SO SB1(9.5-10) MD-002 SO SB2(0.5-1) MD-003 SO SB2(9-9.5) MD-004 SO SB3(1-1.5) MD-005 SO SB3(2.5-3) MD-027 SO SB3( ) MD-006 9/22/2015 9/22/2015 9/22/2015 9/22/2015 9/23/2015 9/23/2015 9/23/2015 (0.5-1) ft BGS (9.5-10) ft BGS (0.5-1) ft BGS (9-9.5) ft BGS (1-1.5) ft BGS (2.5-3) ft BGS ( ) ft BGS VRP Tier III Screening Concentration VOAs 1,1,1-Trichloroethane U U U U U U U 1,1,2,2-Tetrachloroethane U U U U U U U 1,1,2-Trichloroethane U U U U U U U 1,1-Dichloroethane U U U U U U U 1,1-Dichloroethene U U U U U U U 1,2,4-Trichlorobenzene U U U U U U U 1,2-Dibromo-3-chloropropane (DBCP) U U U U U U U 1,2-Dibromoethane (Ethylene dibromide) U U U U U U U 1,2-Dichlorobenzene U U U U U U U 1,2-Dichloroethane U U U U U U U 1,2-Dichloropropane U U U U U U U 1,3-Dichlorobenzene U U U U U U U 1,4-Dichlorobenzene J J U U U U U 2-Butanone (Methyl ethyl ketone) (MEK) U U J U U U U 2-Hexanone U U U U U U U 4-Methyl-2-pentanone (Methyl isobutyl ketone) (MIBK) U U U U U U U Acetone U U 0.02 J U U U U Benzene U U U U U U U Bromodichloromethane U U U U U U U Bromoform U U U U U U U Bromomethane (Methyl bromide) U U U U U U U Carbon disulfide U U U U U U U Carbon tetrachloride U U U U U U U Chlorobenzene U U U U U U U Chloroethane U U U U U U U Chloroform (Trichloromethane) U U U U U U U Chloromethane (Methyl chloride) U U U U U U U cis-1,2-dichloroethene U U U U U U U cis-1,3-dichloropropene U U U U U U U Cyclohexane U U U U U U U Dibromochloromethane U U U U U U U Dichlorodifluoromethane (CFC-12) U U U U U U U Ethylbenzene U U U U U U U Isopropyl benzene U U U U U U U Methyl acetate U U U U U U U Methyl cyclohexane U U U U U U U Methyl tert butyl ether (MTBE) U U U U U U U Methylene chloride U U U U U J Styrene U U U U U U U Tetrachloroethene U U U U U U U Toluene U U U U U U U trans-1,2-dichloroethene U U U U U U U trans-1,3-dichloropropene U U U U U U U Trichloroethene U U U U U U U Trichlorofluoromethane (CFC-11) U U U U U U U Trifluorotrichloroethane (CFC-113) U U U U U U U Vinyl chloride U U U U U U U Xylenes (total) U U U U U U U SVOAs 2,2'-Oxybis(1-chloropropane) (bis(2-chloroisopropyl) ether) U 0.1 U 0.1 U 0.1 U U 0.1 U 0.1 U 2,4,5-Trichlorophenol U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 2,4,6-Trichlorophenol U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 2,4-Dichlorophenol U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 2,4-Dimethylphenol U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 2,4-Dinitrophenol U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 2,4-Dinitrotoluene U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2,6-Dinitrotoluene U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2-Chloronaphthalene U 0.05 U 0.05 U 0.05 U U U 0.05 U 2-Chlorophenol U 0.05 U 0.05 U 0.05 U U U 0.05 U 2-Methylnaphthalene U U U U U U U 2-Methylphenol U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2-Nitroaniline U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2-Nitrophenol 0.05 U 0.05 U 0.05 U 0.05 U U U 0.05 U 3&4-Methylphenol 0.4 U 0.4 U 0.4 U 0.4 U 0.39 U 0.4 U 0.4 U 3,3'-Dichlorobenzidine U 0.1 U 0.1 U 0.1 U U 0.1 U 0.1 U 3-Nitroaniline 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 4,6-Dinitro-2-methylphenol U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 4-Bromophenyl phenyl ether 0.05 U 0.05 U 0.05 U 0.05 U U U 0.05 U 4-Chloro-3-methylphenol U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 4-Chloroaniline U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 4-Chlorophenyl phenyl ether 0.05 U 0.05 U 0.05 U 0.05 U U U 0.05 U 4-Nitroaniline U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 4-Nitrophenol 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U Acenaphthene U U U U U U U Acenaphthylene U U U U U U U Acetophenone U 0.1 U 0.1 U 0.1 U U 0.1 U 0.1 U Anthracene U U U U U U U GHD Memo1-T 1-10/29/2015

6 Table 1 Page 2 of 14 Soil Sub-Slab Soil Investigation SB-1 SB-1 SB-2 SB-2 SB-3 SB-3 SB-3 SO SB1(0.5-1) MD-001 SO SB1(9.5-10) MD-002 SO SB2(0.5-1) MD-003 SO SB2(9-9.5) MD-004 SO SB3(1-1.5) MD-005 SO SB3(2.5-3) MD-027 SO SB3( ) MD-006 9/22/2015 9/22/2015 9/22/2015 9/22/2015 9/23/2015 9/23/2015 9/23/2015 (0.5-1) ft BGS (9.5-10) ft BGS (0.5-1) ft BGS (9-9.5) ft BGS (1-1.5) ft BGS (2.5-3) ft BGS ( ) ft BGS VRP Tier III Screening Concentration Atrazine U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Benzaldehyde U 0.1 U 0.1 U 0.1 U U 0.1 U 0.1 U Benzo(a)anthracene U U U U U U U Benzo(a)pyrene U U U U U U U Benzo(b)fluoranthene U U U U U U U Benzo(g,h,i)perylene U U U U U U U Benzo(k)fluoranthene U U U U U U U Biphenyl (1,1-Biphenyl) U 0.05 U 0.05 U 0.05 U U U 0.05 U bis(2-chloroethoxy)methane U 0.1 U 0.1 U 0.1 U U 0.1 U 0.1 U bis(2-chloroethyl)ether U 0.1 U 0.1 U 0.1 U U 0.1 U 0.1 U bis(2-ethylhexyl)phthalate (DEHP) U 0.07 U 0.07 U 0.07 U U U 0.07 U Butyl benzylphthalate (BBP) U 0.07 U 0.07 U 0.07 U U U 0.07 U Caprolactam U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U Carbazole 0.05 U 0.05 U 0.05 U 0.05 U U U 0.05 U Chrysene U U U U U U U Dibenz(a,h)anthracene U U U U U U U Dibenzofuran U 0.05 U 0.05 U 0.05 U U U 0.05 U Diethyl phthalate U 0.07 U 0.07 U 0.07 U U U 0.07 U Dimethyl phthalate 0.07 U 0.07 U 0.07 U 0.07 U U U 0.07 U Di-n-butylphthalate (DBP) U 0.07 U 0.07 U 0.07 U U U 0.07 U Di-n-octyl phthalate (DnOP) U 0.07 U 0.07 U 0.07 U U U 0.07 U Fluoranthene U U U U U U U Fluorene U U U U U U U Hexachlorobenzene U U U U U U U Hexachlorobutadiene U 0.05 U 0.05 U 0.05 U U U 0.05 U Hexachlorocyclopentadiene U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U Hexachloroethane U 0.05 U 0.05 U 0.05 U U U 0.05 U Indeno(1,2,3-cd)pyrene U U U U U U U Isophorone U 0.05 U 0.05 U 0.05 U U U 0.05 U Naphthalene U U U U U U Nitrobenzene U 0.1 U 0.1 U 0.1 U U 0.1 U 0.1 U N-Nitrosodi-n-propylamine U 0.05 U 0.05 U 0.05 U U U 0.05 U N-Nitrosodiphenylamine U 0.05 U 0.05 U 0.05 U U U 0.05 U Pentachlorophenol U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U Phenanthrene U U U U U U U Phenol U 0.05 U 0.05 U 0.05 U U U 0.05 U Pyrene U U U U U U U Metals Aluminum J 6800 J J 8300 J J J Antimony UJ 0.74 UJ 0.91 UJ 0.87 UJ 0.81 UJ 0.96 UJ 0.71 UJ Arsenic Barium J 11 J 49 J 8.9 J 57 J J Beryllium J 0.30 J 0.35 J 0.35 J J 0.26 J Cadmium U 0.15 U 0.18 U 0.17 U 0.16 U 0.19 U 0.14 U Calcium 1600 J 370 UJ 590 J 430 UJ 810 J UJ Chromium 16 J 11 J 15 J 17 J 17 J J Cobalt J 5.9 Copper Iron J J J J J J Lead Magnesium 840 J 560 J 530 J 630 J 640 J J Manganese J 230 J 330 J 250 J 480 J J Mercury J U J 0.11 U J J U Nickel J Potassium 850 J 470 J 1900 J 2500 J 820 J 400 J 360 UJ Selenium U 0.25 J 0.45 U 0.43 U 0.32 J 0.48 U 0.27 J Silver U 0.37 U 0.45 U 0.43 U 0.41 U 0.48 U 0.36 U Sodium 420 J 370 U J 360 U Thallium U 0.74 U 0.91 U 0.87 U 0.81 U 0.96 U 0.71 U Vanadium J 20 J 41 J 32 J 42 J J Zinc PCBs Aroclor-1016 (PCB-1016) U U U U U U U Aroclor-1221 (PCB-1221) U U U U U U U Aroclor-1232 (PCB-1232) U U U U U U U Aroclor-1242 (PCB-1242) U U U U U U U Aroclor-1248 (PCB-1248) U U U U U U U Aroclor-1254 (PCB-1254) U U U U U U U Aroclor-1260 (PCB-1260) U U U U U U U Footnotes: U - Not detected at the associated reporting limit. J - Estimated concentration. UJ - Not detected; associated reporting limit is estimated. R - Rejected. GHD Memo1-T 1-10/29/2015

7 Table 1 Page 3 of 14 Soil Sub-Slab Soil Investigation SB-4 SB-4 SB-5 SB-5 SB-5 SB-6 SB-6 SO SB4(1-1.5) MD-007 SO SB4(7-7.5) MD-008 SO SB5(1.5-2) MD-009 SO SB5(5.5-6) MD-010 SO SB5( ) MD-011 SO SB6(1-1.5) MD-012 SO SB6(6-6.5) MD-013 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 (1-1.5) ft BGS (7-7.5) ft BGS (1.5-2) ft BGS (5.5-6) ft BGS ( ) ft BGS (1-1.5) ft BGS (6-6.5) ft BGS VRP Tier III Screening Concentration VOAs 1,1,1-Trichloroethane ,1,2,2-Tetrachloroethane 27 1,1,2-Trichloroethane ,1-Dichloroethane 160 1,1-Dichloroethene 100 1,2,4-Trichlorobenzene 26 1,2-Dibromo-3-chloropropane (DBCP) ,2-Dibromoethane (Ethylene dibromide) 1.6 1,2-Dichlorobenzene 930 1,2-Dichloroethane 14 1,2-Dichloropropane 6.6 1,3-Dichlorobenzene 110 1,4-Dichlorobenzene Butanone (Methyl ethyl ketone) (MEK) Hexanone Methyl-2-pentanone (Methyl isobutyl ketone) (MIBK) 5600 Acetone Benzene 42 Bromodichloromethane 13 Bromoform 1600 Bromomethane (Methyl bromide) 3 Carbon disulfide 350 Carbon tetrachloride 29 Chlorobenzene 130 Chloroethane 5700 Chloroform (Trichloromethane) 14 Chloromethane (Methyl chloride) 46 cis-1,2-dichloroethene 230 cis-1,3-dichloropropene 2300 Cyclohexane 2700 Dibromochloromethane 32 Dichlorodifluoromethane (CFC-12) 37 Ethylbenzene 250 Isopropyl benzene 1100 Methyl acetate Methyl cyclohexane Methyl tert butyl ether (MTBE) 2100 Methylene chloride 320 Styrene 3500 Tetrachloroethene 39 Toluene 4700 trans-1,2-dichloroethene 2300 trans-1,3-dichloropropene 2300 Trichloroethene 1.9 Trichlorofluoromethane (CFC-11) 310 Trifluorotrichloroethane (CFC-113) Vinyl chloride 17 Xylenes (total) 250 SVOAs 2,2'-Oxybis(1-chloropropane) (bis(2-chloroisopropyl) ether) 220 2,4,5-Trichlorophenol ,4,6-Trichlorophenol 82 2,4-Dichlorophenol 250 2,4-Dimethylphenol ,4-Dinitrophenol 160 2,4-Dinitrotoluene 74 2,6-Dinitrotoluene 15 2-Chloronaphthalene Chlorophenol Methylnaphthalene Methylphenol Nitroaniline Nitrophenol 3&4-Methylphenol 3,3'-Dichlorobenzidine 51 3-Nitroaniline 4,6-Dinitro-2-methylphenol Bromophenyl phenyl ether 4-Chloro-3-methylphenol Chloroaniline Chlorophenyl phenyl ether 4-Nitroaniline Nitrophenol Acenaphthene 4500 Acenaphthylene 2300 Acetophenone Anthracene U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.01 U U U U U U 0.01 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.02 U U U U U U 0.02 U 0.02 U U U U U U 0.02 U 0.02 U U U U U U 0.02 U 0.02 U U U J U U 0.02 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.01 U U U U U U 0.01 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.01 U U U U U U 0.01 U 0.01 U U U U U U 0.01 U U U U U U U U U U J U U U J U U U U U U U U U U U U U J J U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.01 U U U U U U 0.01 U 0.1 U U 0.1 U 0.1 U 0.1 U 0.1 U U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.33 U 0.33 U 0.33 U 0.34 U 0.33 U 0.33 U 0.33 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.05 U U U U 0.05 U U 0.05 U 0.05 U U U U 0.05 U U 0.05 U U U U U U U U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.05 U U U U 0.05 U U 0.05 U 0.4 U 0.39 U 0.4 U 0.41 U 0.4 U 0.41 U 0.4 U 0.1 U U 0.1 U 0.1 U 0.1 U 0.1 U U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.05 U U U U 0.05 U U 0.05 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.05 U U U U 0.05 U U 0.05 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.33 U 0.33 U 0.33 U 0.34 U 0.33 U 0.33 U 0.33 U U U U U U U U U U U U U U U 0.1 U U 0.1 U 0.1 U 0.1 U 0.1 U U U U U U U U U GHD Memo1-T 1-10/29/2015

8 Table 1 Page 4 of 14 Soil Sub-Slab Soil Investigation VRP Tier III Screening Concentration Atrazine 100 Benzaldehyde Benzo(a)anthracene 29 Benzo(a)pyrene 2.9 Benzo(b)fluoranthene 29 Benzo(g,h,i)perylene 2300 Benzo(k)fluoranthene 290 Biphenyl (1,1-Biphenyl) 20 bis(2-chloroethoxy)methane 250 bis(2-chloroethyl)ether 10 bis(2-ethylhexyl)phthalate (DEHP) 1600 Butyl benzylphthalate (BBP) Caprolactam Carbazole Chrysene 2900 Dibenz(a,h)anthracene 2.9 Dibenzofuran 100 Diethyl phthalate Dimethyl phthalate Di-n-butylphthalate (DBP) 8200 Di-n-octyl phthalate (DnOP) 820 Fluoranthene 3000 Fluorene 3000 Hexachlorobenzene 14 Hexachlorobutadiene 82 Hexachlorocyclopentadiene 490 Hexachloroethane 58 Indeno(1,2,3-cd)pyrene 29 Isophorone Naphthalene 59 Nitrobenzene 130 N-Nitrosodi-n-propylamine 3.3 N-Nitrosodiphenylamine 4700 Pentachlorophenol 40 Phenanthrene 2300 Phenol Pyrene Metals Aluminum Antimony 47 Arsenic 30 Barium Beryllium 230 Cadmium 98 Calcium Chromium Cobalt 35 Copper 4700 Iron Lead 800 Magnesium Manganese 2600 Mercury 4 Nickel 2200 Potassium Selenium 580 Silver 580 Sodium Thallium 1.2 Vanadium 580 Zinc PCBs Aroclor-1016 (PCB-1016) 5.2 Aroclor-1221 (PCB-1221) 6.6 Aroclor-1232 (PCB-1232) 6.6 Aroclor-1242 (PCB-1242) 10 Aroclor-1248 (PCB-1248) 10 Aroclor-1254 (PCB-1254) 1.5 Aroclor-1260 (PCB-1260) 10 SB-4 SB-4 SB-5 SB-5 SB-5 SB-6 SB-6 SO SB4(1-1.5) MD-007 SO SB4(7-7.5) MD-008 SO SB5(1.5-2) MD-009 SO SB5(5.5-6) MD-010 SO SB5( ) MD-011 SO SB6(1-1.5) MD-012 SO SB6(6-6.5) MD-013 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 (1-1.5) ft BGS (7-7.5) ft BGS (1.5-2) ft BGS (5.5-6) ft BGS ( ) ft BGS (1-1.5) ft BGS (6-6.5) ft BGS 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.1 U U 0.1 U 0.1 U 0.1 U 0.1 U U U U U U U U U U U U U U U U U U U U U J U U U U U U U U U U U U U U U 0.05 U U U U 0.05 U U 0.05 U 0.1 U U 0.1 U 0.1 U 0.1 U 0.1 U U 0.1 U U 0.1 U 0.1 U 0.1 U 0.1 U U 0.07 U 0.03 J U U 0.07 U U J 0.07 U U U U 0.07 U U 0.07 U 0.33 U 0.33 U 0.33 U 0.34 U 0.33 U 0.33 U 0.33 U 0.05 U U U U 0.05 U U 0.05 U U U U U U U U U U U U U U U 0.05 U U U U 0.05 U U 0.05 U 0.07 U U U U 0.07 U U 0.07 U 0.07 U U U U 0.07 U U 0.07 U 0.07 U U U U 0.07 U U 0.07 U 0.07 U U U U 0.07 U U 0.07 U U U U U U J U U U U U U U U U U U U U U U 0.05 U U U U 0.05 U U 0.05 U 0.33 U 0.33 U 0.33 U 0.34 U 0.33 U 0.33 U 0.33 U 0.05 U U U U 0.05 U U 0.05 U U U U U U U U 0.05 U U U U 0.05 U U 0.05 U U U U U U U U 0.1 U U 0.1 U 0.1 U 0.1 U 0.1 U U 0.05 U U U U 0.05 U U 0.05 U 0.05 U U U U 0.05 U U 0.05 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U U U U U U U U 0.05 U U U U 0.05 U U 0.05 U U U U U U J U J J 7900 J 3000 J 8100 J 4600 J 2000 J 0.84 UJ 0.93 UJ 0.85 UJ 0.71 UJ 0.74 UJ 0.83 UJ 0.71 UJ J J 50 J 16 J 19 J 20 J 86 J 18 J 12 J 0.39 J 0.34 J 0.35 J 0.26 J J 0.18 J 0.17 U 0.19 U 0.17 U 0.14 U 0.15 U 0.17 U 0.14 U 970 J 660 J 400 J 790 J 1400 J 2100 J 360 UJ 12 J 14 J 11 J 12 J 29 J 12 J 8.7 J J J J J 8200 J J J 6100 J J 520 J 370 J 290 J 3800 J 640 J 280 J 280 J 130 J 180 J 260 J 230 J 210 J 190 J J J J U U 0.11 U U J 3.0 J 2.0 J J 1.8 J 400 J 410 J 400 J 190 J 3600 J 370 J 360 UJ U 0.40 J 0.35 U 0.27 J 0.34 J 0.36 U 0.42 U 0.46 U 0.42 U 0.35 U 0.37 U 0.41 U 0.36 U 420 U 460 U 420 U 350 U 370 U 410 U 360 U 0.84 U 0.93 U 0.85 U 0.71 U 0.74 U 0.83 U 0.71 U 32 J 34 J 26 J 16 J 31 J 21 J 13 J U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U Footnotes: U - Not detected at the associated reporting limit. J - Estimated concentration. UJ - Not detected; associated reporting limit is estimated. R - Rejected. GHD Memo1-T 1-10/29/2015

9 Table 1 Page 5 of 14 Soil Sub-Slab Soil Investigation SB-6 SB-7 SB-7 SB-8 SB-8 SB-9 SB-9 SO SB6( ) MD-014 SO SB7(1-1.5) MD-015 SO SB7(8-8.5) MD-016 SO SB8(1-1.5) MD-017 SO SB8(8.5-9) MD-018 SO SB9(1-1.5) MD-019 SO SB9(8-8.5) MD-020 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 ( ) ft BGS (1-1.5) ft BGS (8-8.5) ft BGS (1-1.5) ft BGS (8.5-9) ft BGS (1-1.5) ft BGS (8-8.5) ft BGS VRP Tier III Screening Concentration VOAs 1,1,1-Trichloroethane ,1,2,2-Tetrachloroethane 27 1,1,2-Trichloroethane ,1-Dichloroethane 160 1,1-Dichloroethene 100 1,2,4-Trichlorobenzene 26 1,2-Dibromo-3-chloropropane (DBCP) ,2-Dibromoethane (Ethylene dibromide) 1.6 1,2-Dichlorobenzene 930 1,2-Dichloroethane 14 1,2-Dichloropropane 6.6 1,3-Dichlorobenzene 110 1,4-Dichlorobenzene Butanone (Methyl ethyl ketone) (MEK) Hexanone Methyl-2-pentanone (Methyl isobutyl ketone) (MIBK) 5600 Acetone Benzene 42 Bromodichloromethane 13 Bromoform 1600 Bromomethane (Methyl bromide) 3 Carbon disulfide 350 Carbon tetrachloride 29 Chlorobenzene 130 Chloroethane 5700 Chloroform (Trichloromethane) 14 Chloromethane (Methyl chloride) 46 cis-1,2-dichloroethene 230 cis-1,3-dichloropropene 2300 Cyclohexane 2700 Dibromochloromethane 32 Dichlorodifluoromethane (CFC-12) 37 Ethylbenzene 250 Isopropyl benzene 1100 Methyl acetate Methyl cyclohexane Methyl tert butyl ether (MTBE) 2100 Methylene chloride 320 Styrene 3500 Tetrachloroethene 39 Toluene 4700 trans-1,2-dichloroethene 2300 trans-1,3-dichloropropene 2300 Trichloroethene 1.9 Trichlorofluoromethane (CFC-11) 310 Trifluorotrichloroethane (CFC-113) Vinyl chloride 17 Xylenes (total) 250 SVOAs 2,2'-Oxybis(1-chloropropane) (bis(2-chloroisopropyl) ether) 220 2,4,5-Trichlorophenol ,4,6-Trichlorophenol 82 2,4-Dichlorophenol 250 2,4-Dimethylphenol ,4-Dinitrophenol 160 2,4-Dinitrotoluene 74 2,6-Dinitrotoluene 15 2-Chloronaphthalene Chlorophenol Methylnaphthalene Methylphenol Nitroaniline Nitrophenol 3&4-Methylphenol 3,3'-Dichlorobenzidine 51 3-Nitroaniline 4,6-Dinitro-2-methylphenol Bromophenyl phenyl ether 4-Chloro-3-methylphenol Chloroaniline Chlorophenyl phenyl ether 4-Nitroaniline Nitrophenol Acenaphthene 4500 Acenaphthylene 2300 Acetophenone Anthracene U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.01 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U J U U U 0.02 U J 0.02 U U U U U 0.02 U U 0.02 U U U U U 0.02 U U 0.02 U U U U J U U J U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.01 U U U U U U U U U U U U U U U U U U U J U U U U U U U U U U U U U U U 0.01 U U U U U U U 0.01 U U U U U U U U U U J J J J J U U U U U U U U U U U U U U U U J J J U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U J U 0.01 U U U 0.99 U U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 1.5 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 3.3 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U U U U U U U U 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U 4 U 0.4 U 0.4 U 0.4 U 0.4 U 0.4 U 0.41 U 0.99 U U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.5 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U 1.5 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 3.3 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U U U U U U U U U U U U U U U 0.99 U U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U U U U U U U U GHD Memo1-T 1-10/29/2015

10 Table 1 Page 6 of 14 Soil Sub-Slab Soil Investigation VRP Tier III Screening Concentration Atrazine 100 Benzaldehyde Benzo(a)anthracene 29 Benzo(a)pyrene 2.9 Benzo(b)fluoranthene 29 Benzo(g,h,i)perylene 2300 Benzo(k)fluoranthene 290 Biphenyl (1,1-Biphenyl) 20 bis(2-chloroethoxy)methane 250 bis(2-chloroethyl)ether 10 bis(2-ethylhexyl)phthalate (DEHP) 1600 Butyl benzylphthalate (BBP) Caprolactam Carbazole Chrysene 2900 Dibenz(a,h)anthracene 2.9 Dibenzofuran 100 Diethyl phthalate Dimethyl phthalate Di-n-butylphthalate (DBP) 8200 Di-n-octyl phthalate (DnOP) 820 Fluoranthene 3000 Fluorene 3000 Hexachlorobenzene 14 Hexachlorobutadiene 82 Hexachlorocyclopentadiene 490 Hexachloroethane 58 Indeno(1,2,3-cd)pyrene 29 Isophorone Naphthalene 59 Nitrobenzene 130 N-Nitrosodi-n-propylamine 3.3 N-Nitrosodiphenylamine 4700 Pentachlorophenol 40 Phenanthrene 2300 Phenol Pyrene Metals Aluminum Antimony 47 Arsenic 30 Barium Beryllium 230 Cadmium 98 Calcium Chromium Cobalt 35 Copper 4700 Iron Lead 800 Magnesium Manganese 2600 Mercury 4 Nickel 2200 Potassium Selenium 580 Silver 580 Sodium Thallium 1.2 Vanadium 580 Zinc PCBs Aroclor-1016 (PCB-1016) 5.2 Aroclor-1221 (PCB-1221) 6.6 Aroclor-1232 (PCB-1232) 6.6 Aroclor-1242 (PCB-1242) 10 Aroclor-1248 (PCB-1248) 10 Aroclor-1254 (PCB-1254) 1.5 Aroclor-1260 (PCB-1260) 10 SB-6 SB-7 SB-7 SB-8 SB-8 SB-9 SB-9 SO SB6( ) MD-014 SO SB7(1-1.5) MD-015 SO SB7(8-8.5) MD-016 SO SB8(1-1.5) MD-017 SO SB8(8.5-9) MD-018 SO SB9(1-1.5) MD-019 SO SB9(8-8.5) MD-020 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 ( ) ft BGS (1-1.5) ft BGS (8-8.5) ft BGS (1-1.5) ft BGS (8.5-9) ft BGS (1-1.5) ft BGS (8-8.5) ft BGS 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.99 U U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U 0.99 U U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.99 U U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.69 U U 0.07 U 0.07 U 0.07 U 0.07 U U 0.69 U U 0.07 U 0.07 U 0.07 U 0.07 U U 3.3 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U U U U U U U U U U U U U U U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U 0.69 U U 0.07 U 0.07 U 0.07 U 0.07 U U 0.69 U U 0.07 U 0.07 U 0.07 U 0.07 U U 0.69 U U 0.02 J J 0.07 U J U 0.69 U U 0.07 U 0.07 U 0.07 U 0.07 U U U U U J U U U U U U U U U U U U U U U U U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U 3.3 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U U U U U U U U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U U U U U U U J 0.99 U U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U 1.5 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U U U U U U U U 0.5 U 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U U U U U J U U U 4400 J J 9500 J 5200 J UJ 0.81 UJ 0.92 UJ 0.80 UJ 1.0 UJ 0.95 UJ 0.91 UJ J 50 J 14 J 27 J J J 0.15 J 0.38 J 0.34 J 0.40 J 0.16 U 0.16 U 0.18 U 0.16 U 0.20 U 0.19 U 0.18 U 9100 J 1700 J 3000 J 830 J J 12 J 14 J 13 J 11 J J J 2.1 J 1.8 J J J J J 8000 J J 730 J 590 J 940 J J 260 J 110 J 100 J U J J 0.10 U J 0.11 U J J J 510 J 350 J 860 J 470 J 480 J 450 J 0.40 U 0.41 U 0.43 J 0.40 U 0.50 U 0.32 J U 0.41 U 0.46 U 0.40 U 0.50 U 0.48 U 0.45 U 400 U 220 J J 22 J 24 J 0.79 U 0.81 U 0.92 U 0.80 U 1.0 U 0.95 U 0.91 U 16 J 39 J 33 J 17 J U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U Footnotes: U - Not detected at the associated reporting limit. J - Estimated concentration. UJ - Not detected; associated reporting limit is estimated. R - Rejected. GHD Memo1-T 1-10/29/2015

11 Table 1 Page 7 of 14 Soil Sub-Slab Soil Investigation SB-10 SB-10 SB-11 SB-11 SB-12 SB-12 SB-13 SO SB10(1-1.5) MD-021 SO SB10(8-8.5) MD-022 SO SB11(1.5-2) MD-023 SO SB11(8-8.5) MD-024 SO SB12(1-1.5) MD-025 SO SB12(8-8.5) MD-026 SO SB13(2-2.5) MD-030 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/24/2015 (1-1.5) ft BGS (8-8.5) ft BGS (1.5-2) ft BGS (8-8.5) ft BGS (1-1.5) ft BGS (8-8.5) ft BGS (2-2.5) ft BGS VRP Tier III Screening Concentration VOAs 1,1,1-Trichloroethane ,1,2,2-Tetrachloroethane 27 1,1,2-Trichloroethane ,1-Dichloroethane 160 1,1-Dichloroethene 100 1,2,4-Trichlorobenzene 26 1,2-Dibromo-3-chloropropane (DBCP) ,2-Dibromoethane (Ethylene dibromide) 1.6 1,2-Dichlorobenzene 930 1,2-Dichloroethane 14 1,2-Dichloropropane 6.6 1,3-Dichlorobenzene 110 1,4-Dichlorobenzene Butanone (Methyl ethyl ketone) (MEK) Hexanone Methyl-2-pentanone (Methyl isobutyl ketone) (MIBK) 5600 Acetone Benzene 42 Bromodichloromethane 13 Bromoform 1600 Bromomethane (Methyl bromide) 3 Carbon disulfide 350 Carbon tetrachloride 29 Chlorobenzene 130 Chloroethane 5700 Chloroform (Trichloromethane) 14 Chloromethane (Methyl chloride) 46 cis-1,2-dichloroethene 230 cis-1,3-dichloropropene 2300 Cyclohexane 2700 Dibromochloromethane 32 Dichlorodifluoromethane (CFC-12) 37 Ethylbenzene 250 Isopropyl benzene 1100 Methyl acetate Methyl cyclohexane Methyl tert butyl ether (MTBE) 2100 Methylene chloride 320 Styrene 3500 Tetrachloroethene 39 Toluene 4700 trans-1,2-dichloroethene 2300 trans-1,3-dichloropropene 2300 Trichloroethene 1.9 Trichlorofluoromethane (CFC-11) 310 Trifluorotrichloroethane (CFC-113) Vinyl chloride 17 Xylenes (total) 250 SVOAs 2,2'-Oxybis(1-chloropropane) (bis(2-chloroisopropyl) ether) 220 2,4,5-Trichlorophenol ,4,6-Trichlorophenol 82 2,4-Dichlorophenol 250 2,4-Dimethylphenol ,4-Dinitrophenol 160 2,4-Dinitrotoluene 74 2,6-Dinitrotoluene 15 2-Chloronaphthalene Chlorophenol Methylnaphthalene Methylphenol Nitroaniline Nitrophenol 3&4-Methylphenol 3,3'-Dichlorobenzidine 51 3-Nitroaniline 4,6-Dinitro-2-methylphenol Bromophenyl phenyl ether 4-Chloro-3-methylphenol Chloroaniline Chlorophenyl phenyl ether 4-Nitroaniline Nitrophenol Acenaphthene 4500 Acenaphthylene 2300 Acetophenone Anthracene U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.45 U U U U 0.01 U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U J U 0.23 U U U U J J U 0.91 U U J U J U U 0.91 U U U U J U U 0.91 U U U U J 0.03 J U 0.91 U J U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U J U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.45 U U U U 0.01 U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U J U 0.23 U U U U U U U U U U 0.01 U U U 0.45 U U U U 0.01 U U U 0.23 U U U U U U J 0.17 J U J U U U 0.23 U U U U U U U 0.23 U U U U U J U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.23 U U U U U U U 0.45 U U U U 0.01 U 0.99 U 0.1 U 0.5 U 0.1 U 0.1 U 0.1 U 0.1 U 1.5 U 0.15 U 0.75 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U 0.75 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U 0.75 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U 0.75 U 0.15 U 0.15 U 0.15 U 0.15 U 3.3 U 0.33 U 1.7 U 0.33 U 0.33 U 0.33 U 0.33 U 2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 0.2 U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U U U 0.03 J U U U U 2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 0.2 U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U 3.9 U 0.4 U 2 U 0.4 U 0.4 U 0.4 U J 0.99 U 0.1 U 0.5 U 0.1 U 0.1 U 0.1 U 0.1 U 2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 0.2 U 1.5 U 0.15 U 0.75 U 0.15 U 0.15 U 0.15 U 0.15 U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U 1.5 U 0.15 U 0.75 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U 0.75 U 0.15 U 0.15 U 0.15 U 0.15 U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U 2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 0.2 U 3.3 U 0.33 U 1.7 U 0.33 U 0.33 U 0.33 U 0.33 U U U U U U U U U U U U U U 0.99 U 0.1 U 0.5 U 0.1 U 0.1 U 0.1 U 0.1 U U U U U U U J GHD Memo1-T 1-10/29/2015

12 Table 1 Page 8 of 14 Soil Sub-Slab Soil Investigation VRP Tier III Screening Concentration Atrazine 100 Benzaldehyde Benzo(a)anthracene 29 Benzo(a)pyrene 2.9 Benzo(b)fluoranthene 29 Benzo(g,h,i)perylene 2300 Benzo(k)fluoranthene 290 Biphenyl (1,1-Biphenyl) 20 bis(2-chloroethoxy)methane 250 bis(2-chloroethyl)ether 10 bis(2-ethylhexyl)phthalate (DEHP) 1600 Butyl benzylphthalate (BBP) Caprolactam Carbazole Chrysene 2900 Dibenz(a,h)anthracene 2.9 Dibenzofuran 100 Diethyl phthalate Dimethyl phthalate Di-n-butylphthalate (DBP) 8200 Di-n-octyl phthalate (DnOP) 820 Fluoranthene 3000 Fluorene 3000 Hexachlorobenzene 14 Hexachlorobutadiene 82 Hexachlorocyclopentadiene 490 Hexachloroethane 58 Indeno(1,2,3-cd)pyrene 29 Isophorone Naphthalene 59 Nitrobenzene 130 N-Nitrosodi-n-propylamine 3.3 N-Nitrosodiphenylamine 4700 Pentachlorophenol 40 Phenanthrene 2300 Phenol Pyrene Metals Aluminum Antimony 47 Arsenic 30 Barium Beryllium 230 Cadmium 98 Calcium Chromium Cobalt 35 Copper 4700 Iron Lead 800 Magnesium Manganese 2600 Mercury 4 Nickel 2200 Potassium Selenium 580 Silver 580 Sodium Thallium 1.2 Vanadium 580 Zinc PCBs Aroclor-1016 (PCB-1016) 5.2 Aroclor-1221 (PCB-1221) 6.6 Aroclor-1232 (PCB-1232) 6.6 Aroclor-1242 (PCB-1242) 10 Aroclor-1248 (PCB-1248) 10 Aroclor-1254 (PCB-1254) 1.5 Aroclor-1260 (PCB-1260) 10 SB-10 SB-10 SB-11 SB-11 SB-12 SB-12 SB-13 SO SB10(1-1.5) MD-021 SO SB10(8-8.5) MD-022 SO SB11(1.5-2) MD-023 SO SB11(8-8.5) MD-024 SO SB12(1-1.5) MD-025 SO SB12(8-8.5) MD-026 SO SB13(2-2.5) MD-030 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/23/2015 9/24/2015 (1-1.5) ft BGS (8-8.5) ft BGS (1.5-2) ft BGS (8-8.5) ft BGS (1-1.5) ft BGS (8-8.5) ft BGS (2-2.5) ft BGS 2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 0.2 U 0.99 U 0.1 U 0.5 U 0.1 U 0.1 U 0.1 U 0.1 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U 0.99 U 0.1 U 0.5 U 0.1 U 0.1 U 0.1 U 0.1 U 0.99 U 0.1 U 0.5 U 0.1 U 0.1 U 0.1 U 0.1 U 0.69 U 0.07 U 0.35 U U 0.07 U 0.07 U 0.07 U 0.69 U 0.07 U 0.35 U U 0.07 U 0.07 U 0.07 U 3.3 U 0.33 U 1.7 U 0.33 U 0.33 U 0.33 U 0.33 U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U U U U U U U U U U U U U U 0.49 U 0.05 U J 0.05 U 0.05 U 0.05 U 0.05 U 0.69 U 0.07 U 0.35 U U 0.07 U 0.07 U 0.07 U 0.69 U 0.07 U 0.35 U U 0.07 U 0.07 U 0.07 U 0.69 U J 0.35 U U J 0.07 U 0.07 U 0.69 U 0.07 U 0.35 U U 0.07 U 0.07 U 0.07 U U U U U U U U U U U J U U U U U U U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U 3.3 U 0.33 U 1.7 U 0.33 U 0.33 U 0.33 U 0.33 U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U U U U U U U U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U U U U U U U U 0.99 U 0.1 U 0.5 U 0.1 U 0.1 U 0.1 U 0.1 U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U 0.49 U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U 1.5 U 0.15 U 0.75 U 0.15 U 0.15 U 0.15 U 0.15 U U U U U U U 0.05 U 0.25 U 0.05 U 0.05 U 0.05 U 0.05 U U U U U U UJ 0.87 UJ 0.81 UJ 0.94 UJ 0.82 UJ 0.93 UJ 0.92 U J J 0.22 J J 0.38 J 0.17 U 0.17 U 0.16 U 0.19 U 0.16 U 0.19 U 0.18 U J J J 3.5 J J J J 0.11 U J J J J 3.3 J J J J 370 J 1300 J 360 J 790 J 300 J J 0.47 U J 0.46 U 0.42 U 0.43 U 0.41 U 0.47 U 0.41 U 0.46 U 0.46 U 45 J 430 U 76 J 28 J 35 J 18 J U 0.87 U 0.81 U 0.94 U 0.82 U 0.93 U 0.92 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U J U U U U U U U U U U U Footnotes: U - Not detected at the associated reporting limit. J - Estimated concentration. UJ - Not detected; associated reporting limit is estimated. R - Rejected. GHD Memo1-T 1-10/29/2015

13 Table 1 Page 9 of 14 Soil Sub-Slab Soil Investigation SB-13 SB-13 SB-14 SB-14 SB-15 SB-15 SB-16 SO SB13(6-6.5) MD-031 SO SB13( ) MD-032 SO SB14(2-2.5) MD-033 SO SB14(8-8.5) MD-034 SO SB15(3.5-4) MD-028 SO SB15(8.5-9) MD-029 SO SB16(1.5-2) MD-035 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 (6-6.5) ft BGS ( ) ft BGS (2-2.5) ft BGS (8-8.5) ft BGS (3.5-4) ft BGS (8.5-9) ft BGS (1.5-2) ft BGS VRP Tier III Screening Concentration VOAs 1,1,1-Trichloroethane ,1,2,2-Tetrachloroethane 27 1,1,2-Trichloroethane ,1-Dichloroethane 160 1,1-Dichloroethene 100 1,2,4-Trichlorobenzene 26 1,2-Dibromo-3-chloropropane (DBCP) ,2-Dibromoethane (Ethylene dibromide) 1.6 1,2-Dichlorobenzene 930 1,2-Dichloroethane 14 1,2-Dichloropropane 6.6 1,3-Dichlorobenzene 110 1,4-Dichlorobenzene Butanone (Methyl ethyl ketone) (MEK) Hexanone Methyl-2-pentanone (Methyl isobutyl ketone) (MIBK) 5600 Acetone Benzene 42 Bromodichloromethane 13 Bromoform 1600 Bromomethane (Methyl bromide) 3 Carbon disulfide 350 Carbon tetrachloride 29 Chlorobenzene 130 Chloroethane 5700 Chloroform (Trichloromethane) 14 Chloromethane (Methyl chloride) 46 cis-1,2-dichloroethene 230 cis-1,3-dichloropropene 2300 Cyclohexane 2700 Dibromochloromethane 32 Dichlorodifluoromethane (CFC-12) 37 Ethylbenzene 250 Isopropyl benzene 1100 Methyl acetate Methyl cyclohexane Methyl tert butyl ether (MTBE) 2100 Methylene chloride 320 Styrene 3500 Tetrachloroethene 39 Toluene 4700 trans-1,2-dichloroethene 2300 trans-1,3-dichloropropene 2300 Trichloroethene 1.9 Trichlorofluoromethane (CFC-11) 310 Trifluorotrichloroethane (CFC-113) Vinyl chloride 17 Xylenes (total) 250 SVOAs 2,2'-Oxybis(1-chloropropane) (bis(2-chloroisopropyl) ether) 220 2,4,5-Trichlorophenol ,4,6-Trichlorophenol 82 2,4-Dichlorophenol 250 2,4-Dimethylphenol ,4-Dinitrophenol 160 2,4-Dinitrotoluene 74 2,6-Dinitrotoluene 15 2-Chloronaphthalene Chlorophenol Methylnaphthalene Methylphenol Nitroaniline Nitrophenol 3&4-Methylphenol 3,3'-Dichlorobenzidine 51 3-Nitroaniline 4,6-Dinitro-2-methylphenol Bromophenyl phenyl ether 4-Chloro-3-methylphenol Chloroaniline Chlorophenyl phenyl ether 4-Nitroaniline Nitrophenol Acenaphthene 4500 Acenaphthylene 2300 Acetophenone Anthracene U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U J J U U U U U J U J U J U J U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U J U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U J U U U 0.1 U U U 1 U 0.1 U 0.2 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U R 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U R 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U R 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U R 0.33 U 0.33 U 0.33 U 0.33 U 3.3 U 0.33 U R 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U 0.4 U 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U 0.4 U 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U R U U U U U U U 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U R 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U 0.4 U 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U R 0.4 U 0.4 U 0.4 U 0.4 U 4 U 0.4 U R U 0.1 U U U 1 U 0.1 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U 0.4 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U R 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U R 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U 0.3 U 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U 0.4 U 0.33 U 0.33 U 0.33 U 0.33 U 3.3 U 0.33 U R U U U U U U U U U U U U U U U 0.1 U U U 1 U 0.1 U 0.2 U U U U U U U 0.2 GHD Memo1-T 1-10/29/2015

14 Table 1 Page 10 of 14 Soil Sub-Slab Soil Investigation VRP Tier III Screening Concentration Atrazine 100 Benzaldehyde Benzo(a)anthracene 29 Benzo(a)pyrene 2.9 Benzo(b)fluoranthene 29 Benzo(g,h,i)perylene 2300 Benzo(k)fluoranthene 290 Biphenyl (1,1-Biphenyl) 20 bis(2-chloroethoxy)methane 250 bis(2-chloroethyl)ether 10 bis(2-ethylhexyl)phthalate (DEHP) 1600 Butyl benzylphthalate (BBP) Caprolactam Carbazole Chrysene 2900 Dibenz(a,h)anthracene 2.9 Dibenzofuran 100 Diethyl phthalate Dimethyl phthalate Di-n-butylphthalate (DBP) 8200 Di-n-octyl phthalate (DnOP) 820 Fluoranthene 3000 Fluorene 3000 Hexachlorobenzene 14 Hexachlorobutadiene 82 Hexachlorocyclopentadiene 490 Hexachloroethane 58 Indeno(1,2,3-cd)pyrene 29 Isophorone Naphthalene 59 Nitrobenzene 130 N-Nitrosodi-n-propylamine 3.3 N-Nitrosodiphenylamine 4700 Pentachlorophenol 40 Phenanthrene 2300 Phenol Pyrene Metals Aluminum Antimony 47 Arsenic 30 Barium Beryllium 230 Cadmium 98 Calcium Chromium Cobalt 35 Copper 4700 Iron Lead 800 Magnesium Manganese 2600 Mercury 4 Nickel 2200 Potassium Selenium 580 Silver 580 Sodium Thallium 1.2 Vanadium 580 Zinc PCBs Aroclor-1016 (PCB-1016) 5.2 Aroclor-1221 (PCB-1221) 6.6 Aroclor-1232 (PCB-1232) 6.6 Aroclor-1242 (PCB-1242) 10 Aroclor-1248 (PCB-1248) 10 Aroclor-1254 (PCB-1254) 1.5 Aroclor-1260 (PCB-1260) 10 SB-13 SB-13 SB-14 SB-14 SB-15 SB-15 SB-16 SO SB13(6-6.5) MD-031 SO SB13( ) MD-032 SO SB14(2-2.5) MD-033 SO SB14(8-8.5) MD-034 SO SB15(3.5-4) MD-028 SO SB15(8.5-9) MD-029 SO SB16(1.5-2) MD-035 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 (6-6.5) ft BGS ( ) ft BGS (2-2.5) ft BGS (8-8.5) ft BGS (3.5-4) ft BGS (8.5-9) ft BGS (1.5-2) ft BGS 0.2 U 0.2 U 0.2 U 0.2 U 2 U 0.2 U 0.4 U U 0.1 U U U 1 U 0.1 U 0.2 U U U J U U U U U J U U U U U U U U U U U U U U U U J U U U U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U U 0.1 U U U 1 U 0.1 U 0.2 U U 0.1 U U U 1 U 0.1 U 0.2 U U U 0.07 U U 0.7 U 0.07 U 0.14 U U U 0.07 U U 0.7 U 0.07 U 0.14 U 0.33 U 0.33 U 0.33 U 0.33 U 3.3 U 0.33 U 0.66 U 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U U U J U U U U U U U U U U 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U U U 0.07 U U 0.7 U 0.07 U 0.14 U U U 0.07 U U 0.7 U 0.07 U 0.14 U U U 0.07 U U 0.7 U 0.07 U 0.14 U U U 0.07 U U 0.7 U 0.07 U 0.14 U U U U U U U U U U U U J U U U U U U U 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U 0.33 U 0.33 U 0.33 U 0.33 U 3.3 U 0.33 U 0.66 U 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U U U U U U U U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U U U U U U U U U 0.1 U U U 1 U 0.1 U 0.2 U 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U 0.05 U U 0.05 U 0.05 U 0.5 U 0.05 U 0.1 U 0.15 U 0.15 U 0.15 U 0.15 U 1.5 U 0.15 U R U U J U U U U U 0.05 U 0.05 U 0.5 U 0.05 U R U U U U U UJ 0.78 UJ 0.67 UJ 0.94 UJ 0.81 U 0.85 U 0.85 UJ J J J 0.20 J J J 0.36 J 0.16 U 0.16 U J J 0.16 U 0.17 U J J J J 0.61 J J 2.8 J 1.4 J J 1900 J J 4100 J J J J U J J 0.10 U J J J J 190 J 1300 J 470 J J 0.41 U 0.39 U 0.34 U 0.47 U 0.40 U 0.43 U 0.43 U 0.41 U 0.39 U 0.34 U 0.47 U 0.40 U 0.43 U 0.43 U 37 J 18 J 64 J 22 J 400 U 430 U 37 J 0.81 U 0.78 U 0.67 U 0.94 U 0.81 U 0.85 U 0.85 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U Footnotes: U - Not detected at the associated reporting limit. J - Estimated concentration. UJ - Not detected; associated reporting limit is estimated. R - Rejected. GHD Memo1-T 1-10/29/2015

15 Table 1 Page 11 of 14 Soil Sub-Slab Soil Investigation SB-16 SB-17 SB-17 SB-18 SB-18 SB-19 SB-19 SO SB16(9-9.5) MD-036 SO SB17(1.5-2) MD-041 SO SB17(9-9.5) MD-042 SO SB18(1.5-2) MD-037 SO SB18(8-8.5) MD-038 SO SB19(1.5-2) MD-039 SO SB19(9-9.5) MD-040 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 (9-9.5) ft BGS (1.5-2) ft BGS (9-9.5) ft BGS (1.5-2) ft BGS (8-8.5) ft BGS (1.5-2) ft BGS (9-9.5) ft BGS VRP Tier III Screening Concentration VOAs 1,1,1-Trichloroethane ,1,2,2-Tetrachloroethane 27 1,1,2-Trichloroethane ,1-Dichloroethane 160 1,1-Dichloroethene 100 1,2,4-Trichlorobenzene 26 1,2-Dibromo-3-chloropropane (DBCP) ,2-Dibromoethane (Ethylene dibromide) 1.6 1,2-Dichlorobenzene 930 1,2-Dichloroethane 14 1,2-Dichloropropane 6.6 1,3-Dichlorobenzene 110 1,4-Dichlorobenzene Butanone (Methyl ethyl ketone) (MEK) Hexanone Methyl-2-pentanone (Methyl isobutyl ketone) (MIBK) 5600 Acetone Benzene 42 Bromodichloromethane 13 Bromoform 1600 Bromomethane (Methyl bromide) 3 Carbon disulfide 350 Carbon tetrachloride 29 Chlorobenzene 130 Chloroethane 5700 Chloroform (Trichloromethane) 14 Chloromethane (Methyl chloride) 46 cis-1,2-dichloroethene 230 cis-1,3-dichloropropene 2300 Cyclohexane 2700 Dibromochloromethane 32 Dichlorodifluoromethane (CFC-12) 37 Ethylbenzene 250 Isopropyl benzene 1100 Methyl acetate Methyl cyclohexane Methyl tert butyl ether (MTBE) 2100 Methylene chloride 320 Styrene 3500 Tetrachloroethene 39 Toluene 4700 trans-1,2-dichloroethene 2300 trans-1,3-dichloropropene 2300 Trichloroethene 1.9 Trichlorofluoromethane (CFC-11) 310 Trifluorotrichloroethane (CFC-113) Vinyl chloride 17 Xylenes (total) 250 SVOAs 2,2'-Oxybis(1-chloropropane) (bis(2-chloroisopropyl) ether) 220 2,4,5-Trichlorophenol ,4,6-Trichlorophenol 82 2,4-Dichlorophenol 250 2,4-Dimethylphenol ,4-Dinitrophenol 160 2,4-Dinitrotoluene 74 2,6-Dinitrotoluene 15 2-Chloronaphthalene Chlorophenol Methylnaphthalene Methylphenol Nitroaniline Nitrophenol 3&4-Methylphenol 3,3'-Dichlorobenzidine 51 3-Nitroaniline 4,6-Dinitro-2-methylphenol Bromophenyl phenyl ether 4-Chloro-3-methylphenol Chloroaniline Chlorophenyl phenyl ether 4-Nitroaniline Nitrophenol Acenaphthene 4500 Acenaphthylene 2300 Acetophenone Anthracene U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.01 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.02 U U U U U U U 0.02 U U U U U U U 0.02 U U U U U U U 0.02 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.01 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.01 U U U U U U U 0.01 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.01 U U U U 0.1 U 0.1 U U 0.1 U 0.1 U U 0.1 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U U 0.05 U U 0.05 U 0.05 U U 0.05 U U 0.05 U U 0.05 U 0.05 U U 0.05 U U U U U U U U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U U 0.05 U U 0.05 U 0.05 U U 0.05 U 0.4 U 0.4 U 0.4 U 0.4 U 0.4 U 0.4 U 0.4 U 0.1 U 0.1 U U 0.1 U 0.1 U U 0.1 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U U 0.05 U U 0.05 U 0.05 U U 0.05 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U U 0.05 U U 0.05 U 0.05 U U 0.05 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U U U U U U U U U U U U U U U 0.1 U 0.1 U U 0.1 U 0.1 U U 0.1 U U U U U U U U GHD Memo1-T 1-10/29/2015

16 Table 1 Page 12 of 14 Soil Sub-Slab Soil Investigation VRP Tier III Screening Concentration Atrazine 100 Benzaldehyde Benzo(a)anthracene 29 Benzo(a)pyrene 2.9 Benzo(b)fluoranthene 29 Benzo(g,h,i)perylene 2300 Benzo(k)fluoranthene 290 Biphenyl (1,1-Biphenyl) 20 bis(2-chloroethoxy)methane 250 bis(2-chloroethyl)ether 10 bis(2-ethylhexyl)phthalate (DEHP) 1600 Butyl benzylphthalate (BBP) Caprolactam Carbazole Chrysene 2900 Dibenz(a,h)anthracene 2.9 Dibenzofuran 100 Diethyl phthalate Dimethyl phthalate Di-n-butylphthalate (DBP) 8200 Di-n-octyl phthalate (DnOP) 820 Fluoranthene 3000 Fluorene 3000 Hexachlorobenzene 14 Hexachlorobutadiene 82 Hexachlorocyclopentadiene 490 Hexachloroethane 58 Indeno(1,2,3-cd)pyrene 29 Isophorone Naphthalene 59 Nitrobenzene 130 N-Nitrosodi-n-propylamine 3.3 N-Nitrosodiphenylamine 4700 Pentachlorophenol 40 Phenanthrene 2300 Phenol Pyrene Metals Aluminum Antimony 47 Arsenic 30 Barium Beryllium 230 Cadmium 98 Calcium Chromium Cobalt 35 Copper 4700 Iron Lead 800 Magnesium Manganese 2600 Mercury 4 Nickel 2200 Potassium Selenium 580 Silver 580 Sodium Thallium 1.2 Vanadium 580 Zinc PCBs Aroclor-1016 (PCB-1016) 5.2 Aroclor-1221 (PCB-1221) 6.6 Aroclor-1232 (PCB-1232) 6.6 Aroclor-1242 (PCB-1242) 10 Aroclor-1248 (PCB-1248) 10 Aroclor-1254 (PCB-1254) 1.5 Aroclor-1260 (PCB-1260) 10 SB-16 SB-17 SB-17 SB-18 SB-18 SB-19 SB-19 SO SB16(9-9.5) MD-036 SO SB17(1.5-2) MD-041 SO SB17(9-9.5) MD-042 SO SB18(1.5-2) MD-037 SO SB18(8-8.5) MD-038 SO SB19(1.5-2) MD-039 SO SB19(9-9.5) MD-040 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 9/24/2015 (9-9.5) ft BGS (1.5-2) ft BGS (9-9.5) ft BGS (1.5-2) ft BGS (8-8.5) ft BGS (1.5-2) ft BGS (9-9.5) ft BGS 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.1 U 0.1 U U 0.1 U 0.1 U U 0.1 U U J U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.05 U U 0.05 U 0.05 U U 0.05 U 0.1 U 0.1 U U 0.1 U 0.1 U U 0.1 U 0.1 U 0.1 U U 0.1 U 0.1 U U 0.1 U U J 0.07 U J U 0.07 U U 0.07 U 0.07 U U 0.07 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U U 0.05 U U 0.05 U 0.05 U U 0.05 U U U U U U U U U U U U U U U 0.05 U U 0.05 U 0.05 U U 0.05 U U 0.07 U U 0.07 U 0.07 U U 0.07 U U 0.07 U U 0.07 U 0.07 U U 0.07 U U J U 0.07 U 0.07 U U 0.07 U U 0.07 U U 0.07 U 0.07 U U 0.07 U U U U U U U U U U U U U U U U U U U U U U 0.05 U U 0.05 U 0.05 U U 0.05 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U 0.33 U R U 0.05 U U 0.05 U 0.05 U U 0.05 U U U U U U U U U 0.05 U U 0.05 U 0.05 U U 0.05 U U U U U U U U 0.1 U 0.1 U U 0.1 U 0.1 U U 0.1 U U 0.05 U U 0.05 U 0.05 U U 0.05 U U 0.05 U U 0.05 U 0.05 U U 0.05 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U U U U U U U U 0.05 U U 0.05 U 0.05 U U 0.05 U U U U U U U UJ 0.93 UJ 0.86 UJ 0.75 UJ 0.85 UJ 0.84 UJ 0.98 UJ J 0.25 J 0.29 J 0.24 J 0.32 J 0.32 J 0.30 J 0.33 J 0.17 U 0.12 J 0.17 U 0.15 U 0.17 U 0.17 U 0.20 U J J 3.8 J 1.3 J 1.3 J 1.5 J 1.1 J 1.2 J J J 4400 J 5300 J 6700 J 5000 J J J J J J J J J J J J J 1500 J 480 J 380 J 360 J 240 J 490 J 0.42 U 0.46 U 0.43 U 0.37 U 0.43 U 0.42 U 0.49 U 0.42 U 0.46 U 0.43 U 0.37 U 0.43 U 0.42 U 0.49 U 22 J 57 J 21 J 34 J 430 U 50 J 22 J 0.84 U 0.93 U 0.86 U 0.75 U 0.85 U 0.84 U 0.98 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U Footnotes: U - Not detected at the associated reporting limit. J - Estimated concentration. UJ - Not detected; associated reporting limit is estimated. R - Rejected. GHD Memo1-T 1-10/29/2015

17 Table 1 Page 13 of 14 Soil Sub-Slab Soil Investigation SB-20 SB-20 SO SB20(1.5-2) MD-043 SO SB20(9-9.5) MD-044 9/24/2015 9/24/2015 (1.5-2) ft BGS (9-9.5) ft BGS VRP Tier III Screening Concentration VOAs 1,1,1-Trichloroethane ,1,2,2-Tetrachloroethane 27 1,1,2-Trichloroethane ,1-Dichloroethane 160 1,1-Dichloroethene 100 1,2,4-Trichlorobenzene 26 1,2-Dibromo-3-chloropropane (DBCP) ,2-Dibromoethane (Ethylene dibromide) 1.6 1,2-Dichlorobenzene 930 1,2-Dichloroethane 14 1,2-Dichloropropane 6.6 1,3-Dichlorobenzene 110 1,4-Dichlorobenzene Butanone (Methyl ethyl ketone) (MEK) Hexanone Methyl-2-pentanone (Methyl isobutyl ketone) (MIBK) 5600 Acetone Benzene 42 Bromodichloromethane 13 Bromoform 1600 Bromomethane (Methyl bromide) 3 Carbon disulfide 350 Carbon tetrachloride 29 Chlorobenzene 130 Chloroethane 5700 Chloroform (Trichloromethane) 14 Chloromethane (Methyl chloride) 46 cis-1,2-dichloroethene 230 cis-1,3-dichloropropene 2300 Cyclohexane 2700 Dibromochloromethane 32 Dichlorodifluoromethane (CFC-12) 37 Ethylbenzene 250 Isopropyl benzene 1100 Methyl acetate Methyl cyclohexane Methyl tert butyl ether (MTBE) 2100 Methylene chloride 320 Styrene 3500 Tetrachloroethene 39 Toluene 4700 trans-1,2-dichloroethene 2300 trans-1,3-dichloropropene 2300 Trichloroethene 1.9 Trichlorofluoromethane (CFC-11) 310 Trifluorotrichloroethane (CFC-113) Vinyl chloride 17 Xylenes (total) 250 SVOAs 2,2'-Oxybis(1-chloropropane) (bis(2-chloroisopropyl) ether) 220 2,4,5-Trichlorophenol ,4,6-Trichlorophenol 82 2,4-Dichlorophenol 250 2,4-Dimethylphenol ,4-Dinitrophenol 160 2,4-Dinitrotoluene 74 2,6-Dinitrotoluene 15 2-Chloronaphthalene Chlorophenol Methylnaphthalene Methylphenol Nitroaniline Nitrophenol 3&4-Methylphenol 3,3'-Dichlorobenzidine 51 3-Nitroaniline 4,6-Dinitro-2-methylphenol Bromophenyl phenyl ether 4-Chloro-3-methylphenol Chloroaniline Chlorophenyl phenyl ether 4-Nitroaniline Nitrophenol Acenaphthene 4500 Acenaphthylene 2300 Acetophenone Anthracene U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U 0.1 U 0.1 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.15 U 0.33 U 0.33 U 0.2 U 0.2 U 0.2 U 0.2 U 0.05 U 0.05 U 0.05 U 0.05 U U U 0.2 U 0.2 U 0.2 U 0.2 U 0.05 U 0.05 U 0.4 U 0.4 U 0.1 U 0.1 U 0.2 U 0.2 U 0.15 U 0.15 U 0.05 U 0.05 U 0.15 U 0.15 U 0.15 U 0.15 U 0.05 U 0.05 U 0.2 U 0.2 U 0.33 U 0.33 U U U U U 0.1 U 0.1 U U U GHD Memo1-T 1-10/29/2015

18 Table 1 Page 14 of 14 Soil Sub-Slab Soil Investigation VRP Tier III Screening Concentration Atrazine 100 Benzaldehyde Benzo(a)anthracene 29 Benzo(a)pyrene 2.9 Benzo(b)fluoranthene 29 Benzo(g,h,i)perylene 2300 Benzo(k)fluoranthene 290 Biphenyl (1,1-Biphenyl) 20 bis(2-chloroethoxy)methane 250 bis(2-chloroethyl)ether 10 bis(2-ethylhexyl)phthalate (DEHP) 1600 Butyl benzylphthalate (BBP) Caprolactam Carbazole Chrysene 2900 Dibenz(a,h)anthracene 2.9 Dibenzofuran 100 Diethyl phthalate Dimethyl phthalate Di-n-butylphthalate (DBP) 8200 Di-n-octyl phthalate (DnOP) 820 Fluoranthene 3000 Fluorene 3000 Hexachlorobenzene 14 Hexachlorobutadiene 82 Hexachlorocyclopentadiene 490 Hexachloroethane 58 Indeno(1,2,3-cd)pyrene 29 Isophorone Naphthalene 59 Nitrobenzene 130 N-Nitrosodi-n-propylamine 3.3 N-Nitrosodiphenylamine 4700 Pentachlorophenol 40 Phenanthrene 2300 Phenol Pyrene Metals Aluminum Antimony 47 Arsenic 30 Barium Beryllium 230 Cadmium 98 Calcium Chromium Cobalt 35 Copper 4700 Iron Lead 800 Magnesium Manganese 2600 Mercury 4 Nickel 2200 Potassium Selenium 580 Silver 580 Sodium Thallium 1.2 Vanadium 580 Zinc PCBs Aroclor-1016 (PCB-1016) 5.2 Aroclor-1221 (PCB-1221) 6.6 Aroclor-1232 (PCB-1232) 6.6 Aroclor-1242 (PCB-1242) 10 Aroclor-1248 (PCB-1248) 10 Aroclor-1254 (PCB-1254) 1.5 Aroclor-1260 (PCB-1260) 10 SB-20 SB-20 SO SB20(1.5-2) MD-043 SO SB20(9-9.5) MD-044 9/24/2015 9/24/2015 (1.5-2) ft BGS (9-9.5) ft BGS 0.2 U 0.2 U 0.1 U 0.1 U U U U U U U U U U U 0.05 U 0.05 U 0.1 U 0.1 U 0.1 U 0.1 U J J 0.07 U 0.07 U 0.33 U 0.33 U 0.05 U 0.05 U J U U U 0.05 U 0.05 U 0.07 U 0.07 U 0.07 U 0.07 U J J 0.07 U 0.07 U J U U U U U 0.05 U 0.05 U 0.33 U 0.33 U 0.05 U 0.05 U U U 0.05 U 0.05 U U U 0.1 U 0.1 U 0.05 U 0.05 U 0.05 U 0.05 U 0.15 U 0.15 U U U 0.05 U 0.05 U J U J 0.79 UJ J J J J J J J 700 J 0.41 U 0.39 U 0.41 U 0.39 U 33 J 27 J 0.81 U 0.79 U U U U U U U U U U U U U U U Footnotes: U - Not detected at the associated reporting limit. J - Estimated concentration. UJ - Not detected; associated reporting limit is estimated. R - Rejected. GHD Memo1-T 1-10/29/2015

19 Attachment A Stratigraphic Logs GHD Memo1-TPs

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