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HomeMy WebLinkAboutWA-26393_31591_CA_RPTS_20190213_RMR PERIODIC MONITORING REPORT UST SITES MCAS CHERRY POINT MARINE CORPS AIR STATION CHERRY POINT, NORTH CAROLINA VOLUME I SECOND SEMESTER (JULY 2018 - DECEMBER 2018) CONTRACT NO. N40085-17-D-8330 TASK ORDER NO. N4008518F6086 SDC GROUP, INC. PROJECT NO. 6336 CATLIN ENGINEERS AND SCIENTISTS PROJECT NO. 218001 PREPARED FOR: SDC GROUP, INC. 1108 TIDEWATER DRIVE NORFOLK, VIRGINIA Prepared By: 220 Old Dairy Road Wilmington, NC 28405 (910) 452-5861 CORPORATE LICENSURE NO. FOR ENGINEERING SERVICES C-0585 NC CORPORATE NUMBER FOR GEOLOGY SERVICES : C-118 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE OF CONTENTS PERIODIC MONITORING REPORT MCAS CHERRY POINT UST CLOSURE AND MANAGEMENT PROGRAM FOR UST SITES SITES AT MCAS CHERRY POINT, NORTH CAROLINA INTRODUCTION NARRATIVE TABLE I INDEX OF SITES FOR THIS REPORT TABLE II CAMP SAMPLING SCHEDULE TABLE III INDEX OF CLOSED SITES SINCE 1998 TABLE IV HISTORY OF NC REGULATORY STANDARDS TABLE V INDEX OF INJECTION PERMIT SITES TABLE VI FREE PRODUCT RECOVERY TOTAL (LAST TWO YEARS) FIGURE I FACILITY LOCATIONS MAP FIGURE II MCAS CHERRY POINT SITE LOCATIONS MAP 1.0 SITE 121 EXECUTIVE SUMMARY 2.0 SITE 130 EXECUTIVE SUMMARY TABLE 2.1A SITE 130 FIELD MEASUREMENTS TABLE 2.1B SITE 130 HISTORICAL FIELD MEASUREMENT DATA TABLE 2.2A SITE 130 GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 2.2B SITE 130 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 2.3A SITE 130 GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 2.3B SITE 130 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 2.4 SITE 130/3996 EFFLUENT AIR LABORATORY ANALYTICAL RESULTS FIGURE 2.1 SITE 130 FREE PRODUCT PLUME MAP AS OF AUGUST 2018 FIGURE 2.2 SITE 130 SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L – UST COMPOUNDS AS OF AUGUST 2018 FIGURE 2.3 SITE 130 EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE OF CONTENTS – continued 3.0 SITE 133 EXECUTIVE SUMMARY TABLE 3.1A SITE 133 FIELD MEASUREMENTS TABLE 3.1B SITE 133 HISTORICAL FIELD MEASUREMENT DATA TABLE 3.2A SITE 133 GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 3.2B SITE 133 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 3.3A SITE 133 GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 3.3B SITE 133 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 3.4 SITE 133 HISTORICAL EFFLUENT LABORATORY ANALYTICAL RESULTS FIGURE 3.1 SITE 133 FREE PRODUCT PLUME MAP AS OF AUGUST 2018 FIGURE 3.2A SITE 133 SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L – UST COMPOUNDS AS OF AUGUST 2018 – UPPER SURFICAL AQUIFER FIGURE 3.2B SITE 133 SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L – UST COMPOUNDS AS OF FEBRUARY 2018 – LOWER SURFICAL AQUIFER FIGURE 3.3 SITE 133 EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 – UPPER SURFICAL AQUIFER 4.0 SITE 137 EXECUTIVE SUMMARY TABLE 4.1 SITE 137 HISTORICAL FIELD MEASUREMENT DATA TABLE 4.2 SITE 137 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 4.3 SITE 137 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 4.4 SITE 137 EFFLUENT AIR LABORATORY ANALYTICAL RESULTS TABLE 4.5 SITE 137 HISTORICAL EFFLUENT LABORATORY ANALYTICAL RESULTS FIGURE 4.1 SITE 137 FREE PRODUCT PLUME MAP AS OF DECEMBER 2018 5.0 SITE 1083 EXECUTIVE SUMMARY TABLE 5.1A SITE 1083 FIELD MEASUREMENTS TABLE 5.1B SITE 1083 HISTORICAL FIELD MEASUREMENT DATA TABLE 5.2A SITE 1083 GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 602 BY SM 6200B MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE OF CONTENTS – continued 5.0 SITE 1083 - (cont.) TABLE 5.2B SITE 1083 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 602 BY SM 6200B TABLE 5.3A SITE 1083 GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 5.3B SITE 1083 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 AND EPA METHOD 8260B (NAPHTHALENE ONLY) FIGURE 5.1 SITE 1083 FREE PRODUCT PLUME MAP AS OF AUGUST 2018 FIGURE 5.2 SITE 1083 EPA METHOD 602 BY SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 FIGURE 5.3 SITE 1083 EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 6.0 SITE 1640 EXECUTIVE SUMMARY TABLE 6.1A SITE 1640 FIELD MEASUREMENTS TABLE 6.1B SITE 1640 HISTORICAL FIELD MEASUREMENT DATA TABLE 6.2A SITE 1640 GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 602 BY SM 6200B TABLE 6.2B SITE 1640 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 602 BY SM 6200B TABLE 6.3A SITE 1640 GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 6.3B SITE 1640 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 6.4A SITE 1640 GROUNDWATER LABORATORY ANALYTICAL RESULTS – MADEP VPH/EPH TABLE 6.4B SITE 1640 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS – MADEP VPH/EPH FIGURE 6.1 SITE 1640 FREE PRODUCT PLUME MAP AS OF AUGUST 2018 FIGURE 6.2A SITE 1640 EPA METHOD 602 BY SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018– UPPER SURFICIAL AQUIFER FIGURE 6.2B SITE 1640 EPA METHOD 602 BY SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF FEBRUARY 2018 – LOWER SURFICIAL AQUIFER FIGURE 6.3A SITE 1640 EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 - UPPER SURFICIAL AQUIFER FIGURE 6.3B SITE 1640 EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF FEBRUARY 2018 – LOWER SURFICIAL AQUIFER MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE OF CONTENTS – continued 6.0 SITE 1640 - (cont.) FIGURE 6.4A SITE 1640 MADEP VPH/EPH COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 - UPPER SURFICIAL AQUIFER FIGURE 6.4B SITE 1640 MADEP VPH/EPH COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF FEBRUARY 2018 – LOWER SURFICIAL AQUIFER 7.0 SITE 3996 EXECUTIVE SUMMARY TABLE 7.1A SITE 3996 FIELD MEASUREMENTS TABLE 7.1B SITE 3996 HISTORICAL FIELD MEASUREMENT DATA TABLE 7.2A SITE 3996 GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 7.2B SITE 3996 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 7.3A SITE 3996 GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 7.3B SITE 3996 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 7.4 SITE 130/3996 EFFLUENT AIR LABORATORY ANALYTICAL RESULTS FIGURE 7.1 SITE 3996 FREE PRODUCT PLUME MAP AS OF AUGUST 2018 FIGURE 7.2 SITE 3996 SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L - UST COMPOUNDS AS OF AUGUST 2018 FIGURE 7.3 SITE 3996 EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 8.0 SITE 4075 EXECUTIVE SUMMARY TABLE 8.1A SITE 4075 FIELD MEASUREMENTS TABLE 8.1B SITE 4075 HISTORICAL FIELD MEASUREMENT DATA TABLE 8.2A SITE 4075 GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 8.2B SITE 4075 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 8.3A SITE 4075 GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 8.3B SITE 4075 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 8.4 SITE 4075 HISTORICAL EFFLUENT LABORATORY ANALYTICAL RESULTS FIGURE 8.1 SITE 4075 FREE PRODUCT PLUME MAP AS OF AUGUST 2018 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE OF CONTENTS – continued 8.0 SITE 4075 - (cont.) FIGURE 8.2A SITE 4075 SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L – UST COMPOUNDS AS OF AUGUST 2018 – UPPER SURFICIAL AQUIFER FIGURE 8.2B SITE 4075 SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L – UST COMPOUNDS AS OF FEBRUARY 2018 – LOWER SURFICIAL AQUIFER FIGURE 8.3A SITE 4075 EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 – UPPER SURFICIAL AQUIFER FIGURE 8.3B SITE 4075 EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF FEBRUARY 2018 – LOWER SURFICIAL AQUIFER 9.0 SITE PIT 6 EXECUTIVE SUMMARY TABLE 9.1 SITE PIT 6 HISTORICAL FIELD MEASUREMENT DATA TABLE 9.2 SITE PIT 6 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 602 BY SM 6200B TABLE 9.3 SITE PIT 6 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 FIGURE 9.1 SITE PIT 6 FREE PRODUCT PLUME MAP AS OF DECEMBER 2018 10.0 SITE PIT 12 EXECUTIVE SUMMARY 11.0 SITE PIT 15 EXECUTIVE SUMMARY TABLE 11.1 SITE PIT 15 HISTORICAL FIELD MEASUREMENT DATA TABLE 11.2A SITE PIT 15 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 602 BY SM 6200B TABLE 11.2B SITE PIT 15 HISTORICAL SURFACE WATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 602 BY SM 6200B TABLE 11.3A SITE PIT 15 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 11.3B SITE PIT 15 HISTORICAL SURFACE WATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 FIGURE 11.1 SITE PIT 15 FREE PRODUCT PLUME MAP AS OF DECEMBER 2018 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE OF CONTENTS – continued 12.0 SITE SEGMENT 20 EXECUTIVE SUMMARY TABLE 12.1 SITE SEGMENT 20 HISTORICAL FIELD MEASUREMENT DATA TABLE 12.2A SITE SEGMENT 20 GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 12.2B SITE SEGMENT 20 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 12.3A SITE SEGMENT 20 GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 12.3B SITE SEGMENT 20 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 12.4A SITE SEGMENT 20 GROUNDWATER LABORATORY ANALYTICAL RESULTS - MADEP VPH/EPH TABLE 12.4B SITE SEGMENT 20 HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - MADEP VPH/EPH FIGURE 12.1 SITE SEGMENT 20 FREE PRODUCT PLUME MAP AS OF NOVEMBER 2018 ATTACHMENT A – UPDATED SITE CONCEPTUAL MODEL & GROUDWATER MODEL 13.0 SITE TFB EXECUTIVE SUMMARY TABLE 13.1A SITE TFB FIELD MEASUREMENTS TABLE 13.1B SITE TFB HISTORICAL FIELD MEASUREMENT DATA TABLE 13.2A SITE TFB GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 13.2B SITE TFB HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - SM 6200B TABLE 13.3A SITE TFB GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 13.3B SITE TFB HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 13.4 SITE TFB EFFLUENT AIR LABORATORY ANALYTICAL RESULTS FIGURE 13.1 SITE TFB FREE PRODUCT PLUME MAP AS OF AUGUST 2018 FIGURE 13.2A SITE TFB SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 – UPPER SURFICIAL AQUIFER FIGURE 13.2B SITE TFB SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF FEBRUARY 2018 – LOWER SURFICIAL AQUIFER FIGURE 13.2C SITE TFB SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF FEBRUARY 2018 – UPPER YORKTOWN AQUIFER FIGURE 13.3A SITE TFB EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 – UPPER SURFICIAL AQUIFER MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE OF CONTENTS – continued 13.0 SITE TFB - (cont.) FIGURE 13.3B SITE TFB EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF FEBRUARY 2018 – LOWER SURFICIAL AQUIFER FIGURE 13.3C SITE TFB EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF FEBRUARY 2018 – UPPER YORKTOWN AQUIFER 14.0 SITE TFD EXECUTIVE SUMMARY TABLE 14.1 SITE TFD HISTORICAL FIELD MEASUREMENT DATA TABLE 14.2 SITE TFD HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS – MADEP VPH/EPH FIGURE 14.1 SITE TFD FREE PRODUCT PLUME MAP AS OF DECEMBER 2018 ATTACHMENT A – PRELIMINARY SITE ASSESSMENT FIGURES 15.0 SITE 2ND LAAD EXECUTIVE SUMMARY TABLE 15.1A SITE 2ND LAAD FIELD MEASUREMENTS TABLE 15.1B SITE 2ND LAAD HISTORICAL FIELD MEASUREMENT DATA TABLE 15.2A SITE 2ND LAAD GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 602 BY SM 6200B TABLE 15.2B SITE 2ND LAAD HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 602 BY SM 6200B TABLE 15.3A SITE 2ND LAAD GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 15.3B SITE 2ND LAAD HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - EPA METHOD 610 BY EPA METHOD 625 TABLE 15.4A SITE 2ND LAAD GROUNDWATER LABORATORY ANALYTICAL RESULTS - MADEP VPH/EPH TABLE 15.4B SITE 2ND LAAD HISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS - MADEP VPH/EPH TABLE 15.5 SITE 2ND LAAD EFFLUENT AIR LABORATORY ANALYTICAL RESULTS FIGURE 15.1 SITE 2ND LAAD FREE PRODUCT PLUME MAP AS OF AUGUST 2018 FIGURE 15.2 SITE 2ND LAAD EPA METHOD 602 BY SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 FIGURE 15.3 SITE 2ND LAAD EPA METHOD 610 BY EPA METHOD 625 COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 FIGURE 15.4 SITE 2ND LAAD MADEP VPH/EPH COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 INTRODUCTION The purpose of this Periodic Monitoring Report is to present the results of recent monitoring events performed at petroleum release sites located at Marine Corps Air Station Cherry Point (MCAS Cherry Point). Monitoring and reporting is being performed in accordance with the MCAS Cherry Point UST Closure and Management Program adopted by MCAS Cherry Point Environmental Affairs Department. A listing of sites for which sampling results are included in this Periodic Monitoring Report is presented in Table I and locations of these sites are shown on Figure I and Figure II. This Periodic Monitoring Report is designed such that all data and information pertaining to any individual site is contained entirely within one section of the report and each section is devoted entirely to one site. Therefore, each section serves as a stand-alone monitoring report for the respective site. Each section begins with an Executive Summary which provides information about location, monitoring, groundwater hydraulics, free-phase product plumes, dissolved- phase plumes, potential receptors, and remediation at the site. Each Executive Summary is supported by several site-specific tables and figures. MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE I INDEX OF SITES FOR THIS REPORT SITE NAME NCDEQ INCIDENT NO. SITE LOCATION REPORT SECTION NO. 121 31238 MCAS Cherry Point 1.0 130 31591 MCAS Cherry Point 2.0 133 7144, 9739, 9741 MCAS Cherry Point 3.0 137 6443 MCAS Cherry Point 4.0 1083 9839 MCAS Cherry Point 5.0 1640 9274 MCAS Cherry Point 6.0 3996 31591 MCAS Cherry Point 7.0 4075 6360, 9950, 9140 9276 MCAS Cherry Point 8.0 Pit 6 31501 MCAS Cherry Point 9.0 Pit 12 31356 MCAS Cherry Point 10.0 Pit 15 18715 MCAS Cherry Point 11.0 Segment 20 31312 MCAS Cherry Point 12.0 TFB 6359 MCAS Cherry Point 13.0 TFD 9265 MCAS Cherry Point 14.0 2nd LAAD 38152 MCAS Cherry Point 15.0 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE II CAMP SAMPLING SCHEDULE SECTION SITE ID GW MONITORING FREQUENCY PROPOSED SAMPLING DATES AIR SAMPLING FREQUENCY WASTE STREAM SAMPLING FREQUENCY 1 121 No Sampling Planned 2 130 Annual August 2019 Annual - 4th Quarter 2019 NA 3 133 Annual August 2019 NA Annual - 4th Quarter 2019 4 137 Annual February 2019 Annual - 4th Quarter 2019 Annual - 4th Quarter 2019 5 1083 Semi-Annual February 2019 NA NA Semi-Annual August 2019 6 1640 Annual August 2019 NA NA 7 3996 Semi-Annual February 2019 Annual - 4th Quarter 2019 NA Semi-Annual August 2019 8 4075 Semi-Annual - Lower February 2019 NA Annual - 4th Quarter 2019 Semi-Annual - Upper August 2019 9 Pit 6 Annual February 2019 NA NA 10 Pit 12 No Sampling Planned 11 Pit 15 Annual February 2019 NA NA 12 Segment 20 No Sampling Planned 13 TFB Semi-Annual – Lower/York February 2019 Annual - 4th Quarter 2019 NA Semi-Annual Upper– August 2019 14 TFD Annual February 2019 NA NA 15 2nd LAAD Semi-Annual February 2019 Annual - 4th Quarter 2019 NA August 2019 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE III INDEX OF CLOSED SITES SINCE 1998 SITE NAME SITE LOCATION NCDEQ INCIDENT NO. DATE CLOSED BY NCDEQ 8048 MCAS Cherry Point Not Issued 2/11/1998 1021 MCAS Cherry Point Not Issued 12/11/1998 1648 MCAS Cherry Point 14837 12/11/1998 497 MCAS Cherry Point 18514 12/18/1998 1779 MCAS Cherry Point Not Issued 12/18/1998 248 MCAS Cherry Point Not Issued 12/18/1998 3916 MCAS Cherry Point Not Issued 1/11/1999 1010 MCAS Cherry Point 19235 3/11/1999 1228 MCAS Cherry Point 19236 3/11/1999 1290 MCAS Cherry Point 19234 3/11/1999 498 MCAS Cherry Point 13133 12/7/1999 160 MCAS Cherry Point 13132 12/7/1999 85 MCAS Cherry Point 11277 2/10/2000 1786-3* MCAS Cherry Point 9273 2/10/2000 491* MCAS Cherry Point 12516 5/7/2000 1005-2 MCAS Cherry Point 8990 5/7/2000 1696 MCAS Cherry Point 14837 5/7/2000 3907* MCAS Cherry Point 14573 5/7/2000 8052 MCAS Cherry Point 7493 8/31/2000 487* MCAS Cherry Point 8308 10/17/2000 3904* MCAS Cherry Point 15120 2/21/2001 MTFP* MCAS Cherry Point 9839 7/26/2001 Old CP Hydrant MCAS Cherry Point Not Issued 8/28/2001 Atlantic Hydrant System MCAS Cherry Point Not Issued 4/2/2002 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE III - continued INDEX OF CLOSED SITES SINCE 1998 SITE NAME SITE LOCATION NCDEQ INCIDENT NO. DATE CLOSED BY NCDEQ 1786* MCAS Cherry Point 9373 9/13/2002 Pit 6 MCAS Cherry Point 31023 11/26/2002 296* MCAS Cherry Point 9951 1/22/2003 Hertford #4 MCAS Cherry Point 31069 1/28/2003 TFC* MCAS Cherry Point 6906 3/11/2003 1701 MCAS Cherry Point Not Issued 3/12/2003 3982 MCAS Cherry Point Not Issued 6/9/2003 7012 MCAS Cherry Point 15275 10/20/2003 927* MCAS Cherry Point Not Issued 3/29/2004 Segment 22 JP-5 Pipeline MCAS Cherry Point 31269 5/4/2004 Segment 24 JP-5 Pipeline MCAS Cherry Point 31271 5/5/2004 Segment 2 JP-5 Pipeline MCAS Cherry Point 31272 5/6/2004 Segment 1 JP-5 Pipeline MCAS Cherry Point 31273 5/7/2004 Segment 14 JP-5 Pipeline MCAS Cherry Point 31285 6/2/2004 Segment 15 JP-5 Pipeline MCAS Cherry Point 31287 6/2/2004 Segment 16 JP-5 Pipeline MCAS Cherry Point 31286 6/2/2004 8052/TAFDS MCAS Cherry Point Not Issued 9/9/2004 Lifts A and B MCAS Cherry Point Part of 6360 12/13/2004 Pit 1 MCAS Cherry Point 31390 12/17/2004 82-AT MCAS Cherry Point 32128 6/20/2005 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE III – continued INDEX OF CLOSED SITES SINCE 1998 SITE NAME SITE LOCATION NCDEQ INCIDENT NO. DATE CLOSED BY NCDEQ 82-Bogue MCAS Cherry Point Not Issued 9/21/2005 84-Bogue MCAS Cherry Point 32254 9/21/2005 85-Bogue MCAS Cherry Point 32255 9/21/2005 86-Bogue MCAS Cherry Point 32256 9/21/2005 1783* MCAS Cherry Point 9275 10/27/2005 486* MCAS Cherry Point 9264 11/7/2005 1958 MCAS Cherry Point 31600 5/8/2006 MWSS-274 MCAS Cherry Point 85579 8/7/2006 1672* MCAS Cherry Point 6905 3/19/2007 TFB Transfer Lines (Soils Only) MCAS Cherry Point 6359 3/2/2009 TAFDS MCAS Cherry Point 15256 1/5/2010 100 Gates Road MCAS Cherry Point 31974 1/11/2010 1773* MCAS Cherry Point 31691 3/2/2010 P-120 Sec 1 GW1 MCAS Cherry Point 31956 5/5/2010 P-120 Sec 1 GW2 MCAS Cherry Point 31956 5/5/2010 P-120 Sec 2 GW2 MCAS Cherry Point 38073 10/20/2010 56 Gates Road MCAS Cherry Point 38151 12/3/2010 64 Gates Road MCAS Cherry Point 38149 12/13/2010 62 Gates Road MCAS Cherry Point 38157 1/3/2011 29 Gates Road MCAS Cherry Point 38164 1/11/2011 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE III – continued INDEX OF CLOSED SITES SINCE 1998 SITE NAME SITE LOCATION NCDEQ INCIDENT NO. DATE CLOSED BY NCDEQ 68 Gates Road MCAS Cherry Point 38150 2/1/2011 66 Gates Road MCAS Cherry Point 38174 3/3/2011 137 Conveyance Piping MCAS Cherry Point 31920 3/14/2011 P-120 Sec 2 GW1 (Fuel Hydrant System) MCAS Cherry Point 38069 6/30/2011 P-120 Sec 2 GW2 MCAS Cherry Point 38069 6/30/2011 24 Gates Road MCAS Cherry Point 38246 10/19/2011 Lanham Housing, Site 621 MCAS Cherry Point 38247 10/19/2011 9 Gates UST MCAS Cherry Point 38266 1/23/2012 NADEP Washrack Pipeline MCAS Cherry Point 93139 4/10/2012 1640 Tarmac MCAS Cherry Point Not Issued 4/12/2012 Lanham Housing, Nash Road MCAS Cherry Point 38338 12/4/2013 78 Catawba, Nugent Cove MCAS Cherry Point 38495 5/29/2014 Tower Valve Box* MCAS Cherry Point 31252 2/19/2015 Pit 12* MCAS Cherry Point 31356 12/19/2017 121* MCAS Cherry Point 31238 10/19/2018 * Indicates site was included in the UST Closure and Management Program MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE IV HISTORY OF NC REGULATORY STANDARDS Parameter Previous NC 2L Standard (ug/L) Current/Interim NC 2L Standard (ug/L) Effective Change Date of Current/Interim NC 2L Standard Acetic Acid NE 5000 4/4/2018 Acetochlor NE 100 12/1/2010 Acetochlor ESA NE 1000 12/1/2010 Acetochlor OXA NE 1000 12/1/2010 Acetophenone NE 700 4/1/2011 Acrolein NE 4 10/1/2010 Alachlor NE 0.4 8/1/2010 Aldrin NE 0.002 10/1/2010 Ammonia NE 1,500 8/1/2010 Antimony NE 1 8/1/2010 Benzaldehyde NE 700 4/1/2011 Benzyl Alcohol NE 700 10/1/2010 Beryllium NE 4 10/1/2010 Bromomethane NE 10 8/1/2010 Butanol, n- (n-butyl alcohol) NE 700 8/1/2010 Butanol, sec- (sec-butyl alcohol) NE 10,000 10/1/2010 Butanol, tert- (tert-butyl alcohol) NE 10 6/1/2011 Carbazole NE 2 4/1/2011 4-Chlorotoluene NE 24 10/1/2010 Cobalt NE 1 10/1/2010 Dalapon NE 200 8/1/2010 Dibenzofuran NE 28 5/24/1999 1,4-Dibromobenzene NE 70 8/1/2010 Dibromomethane NE 70 10/1/2010 Dichloroacetic Acid NE 0.7 10/1/2010 1,2-Dichloroethylene, mixed isomers NE 60 10/1/2010 2,4-Dichlorophenol NE 0.98 8/1/2010 DDE NE 0.1 8/1/2010 Dinoseb NE 7 8/1/2010 Diphenyl Ether NE 100 4/1/2011 2,4-Dinitrotoluene NE 0.1 4/1/2011 Diquat NE 20 8/1/2010 Endosulfan sulfate NE 40 4/1/2011 MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE IV – continued HISTORY OF NC REGULATORY STANDARDS Parameter Previous NC 2L Standard (ug/L) Current/Interim NC 2L Standard (ug/L) Effective Change Date of Current/Interim NC 2L Standard Endothall NE 100 8/1/2010 Ethanol (ethyl alcohol) NE 4,000 4/1/2011 Ethyl tert-butyl ether (ETBE) NE 47 4/1/2011 alpha-Hexachlorocyclohexane NE 0.006 4/1/2011 beta-Hexachlorocyclohexane NE 0.02 4/1/2011 2-Hexanone NE 40 4/1/2011 4-Isopropyltoluene (p-cymene) NE 25 4/1/2011 Methyl Isobutyl Ketone NE 100 12/1/2010 Methyl Methacrylate NE 25 8/1/2010 1-Methylnaphthalene NE 1 4/1/2011 2-Methyl phenol (o-cresol) NE 400 4/1/2011 Perchlorate & Perchlorate Salts NE 2 12/1/2010 Perfluorooctanoic acid (PFOA;C8) NE 2 12/6/2006 Picramic Acid NE 0.7 10/1/2010 Polychlorinated Biphenyls NE 0.09 10/1/2010 Propylene Glycol NE 140,000 7/16/2012 Tert-Amyl Methyl Ether (TAME) NE 128 4/1/2011 1,2,4,5-Tetrachlorobenzene NE 2 8/1/2010 1,1,1,2-Tetrachloroethane NE 1 8/1/2010 Thallium NE 0.2 10/1/2010 Tin NE 2,000 10/1/2010 p-Toluic Acid NE 35 4/4/2018 1,1,2-Trichloroethane NE 0.6 8/1/2010 2,4,5-Trichlorophenol NE 63 10/1/2010 2,4,6-Trichlorophenol NE 4 10/1/2010 Vanadium (excluding vanadium pentoxide) NE 0.3 10/1/2010 Vinyl Acetate NE 88 10/1/2010 NE = Not established MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 TABLE V INDEX OF INJECTION PERMIT SITES SITE NAME PERMIT No. INJECTION TYPE DATE PERMIT APPLICATIO N RECEIVED BY NCDEQ DATE PERMIT APPROVED BY NCDEQ DATE PERMIT MODIFIED DATE OF PERMIT EXPIRATION DATE FINAL PROJECT EVALUATION RECEIVED BY NCDEQ NCDEQ CLOSEOUT DATE 121 WI0700208 GW Tracer, Surfactant, nutrients, bacteria 2/3/11 10/6/11 Mod. 6/4/13 Ext. 6/21/11 10/31/11Mo d 6/30/13 Ext. 10/6/11 6/30/18 1/15/15 10/19/18 1083 WQ003574 8 Surfactant Recirculation 1/6/12 Renewal 9/16/13 4/6/12 Renewal 11/8/13 Renewed 11/8/13 Original 3/31/14 Renewed 3/31/19 Not Submitted Yet Not Applicable Yet 1773 WI0700106 Surfactant 5/10/07 8/20/07 Currently None 8/31/09 2/25/09 3/25/11 8049 WI0800160 Surfactant 12/5/08 6/15/09 Mod. 3/25/09 6/16/09 Mod. 6/15/09 2/28/11 6/7/10 4/13/11 8049 WI800336 ORC™ Filter Socks 5/13/13 5/14/13 Currently None Unknown Not Applicable Not Applicable Pit 11 WI0700227 RegenOx™ 5/31/11 7/14/11 Currently None 6/30/13 Report Submitted by EAD 3/20/13 12/19/17 Pit 11 Mod WI0700208 Surfactant, nutrients, bacteria 10/6/11 (Mod. of Bldg. 121 permit) 10/31/11 (Mod. of Bldg. 121 permit) 10/6/11 5/31/13 Report Submitted by EAD 3/20/13 12/19/17 TVB WI0700255 Surfactant, nutrients, bacteria 10/19/11 12/15/11 Currently None 11/31/14 Report Submitted by EAD 7/14/14 7/24/14 2nd LAAD WI0700320 Ambient Air 3/14/13 3/20/13 Currently None Unknown Not Applicable Not Applicable Site 121 130 133 137 1083 1640 3996 4075 B & PIT 12 4075 C PIT 6 PIT 15 SEGMENT 20*TFB TFD *2nd LAAD PIT 11 MCCS Month Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Product (gal) Jan-17 0 0 0 18 0 0 0 47 550 0 4 0 0 0 0 0 0 Feb-17 0 0 2 11 0 0 0 41 385 0 5 0 0 0 0 0 0 Mar-17 0 0 2 50 0 0 0 72 435 0 13 0 0 0 0 0 0 Apr-17 0 0 0 30 0 0 0 74 310 0 6 0 2 0 0 0 0 May-17 0 0 1 51 0 0 0 91 437 0 6 0 0 0 0 0 0 Jun-17 0 2 2 27 0 0 0 75 349 0 5 0 2 0 0 0 0 Jul-17 0 0 2 41 0 0 0 88 292 0 7 0 0 0 0 0 0 Aug-17 0 0 2 43 0 0 0 59 235 0 5 0 0 0 0.02 0 0 Sep-17 0 0 2 7 1 0 0 14 141 0 3 0 0 0 0 0 0 Oct-17 0 3 4 15 0 0 0 38 222 0 1 0 0 0 0 0 0 Nov-17 0 0 4 15 0 0 0 66 360 0 3 0 0 0 0 0 0 Dec-17 0 0 0 8 0 0 0 58 252 0 4 0 0 0 0 0 0 Jan-18 0 0 4 8 0 0 0 59 225 0 6 0 0 0 0 NA 0 Feb-18 0 0 2 8 0 0 0 46 176 0 2 0 0 0 0 NA 0 Mar-18 NA 0 2 15 0 0 0 74 173 0 2 0 0 0 0 NA 0 Apr-18 NA 0 2 24 0 0 0 75 247 0 2 0 0 0 0 NA 0 May-18 NA 0 4 21 0 0 0 57 223 0 3 0 0 0 0 NA 0 Jun-18 NA 0 2 39 0 0 0 57 230 0 1 0 0 0 0 NA 0 Jul-18 NA 1 3 25 0 0 0 70 275 0 2 0 0 0 0 NA 0 Aug-18 NA 1 8 78 0 0 0 56 179 0 7 0 0 0.19124 0 NA 0 Sep-18 NA 0 2 3 0 0 0 33 97 0 0 0 0 0 0 NA 0 Oct-18 NA 1 7 15 1 0 0 21 129 0 1 0 0 0.25 0 NA 0 Nov-18 NA 1 2 9 0 0 0 7 180 0 2 0 0 0.03905 0 NA 0 Dec-18 NA 0 5 18 0 0 0 5 213 0 3 0 0 0.03124 0 NA 0 Totals 0.00 9.00 64.00 579.00 2.00 0.00 0.00 1,283.00 6,315.00 0.00 93.00 0.00 4.00 0.51 0.02 0.00 0.00 Average 0.00 0.38 2.67 24.13 0.08 0.00 0.00 53.46 263.13 0.00 3.88 0.00 0.17 0.02 0.00 0.00 0.00 TABLE VI FREE PRODUCT RECOVERY TOTAL (LAST TWO YEARS) Note: At sites with free product systems where interim product recovery is performed (i.e. bailing, pumping, etc.), the recovered product is emptied into the system; therefore, the interim product recovery volume is included in the total product volume on this table. * = Free Product currently not being recovered at site. NA = Not Applicable MCAS Cherry Point FY-018; Table VI_FPTotals_thru DEC 2018.xlsx CATLIN Project No. 218001 CATLIN Engineers and Scientists February 2019 ^_MCAS Cherry Point £¤ 58 33 70 £¤17 £¤70 £¤17 ³ Data Source: Adapted from NCOneMaps.com FIGUREPROJECTTITLE JOB NO.DATE SCALE DRAWN BY CHECKED BY IFACILITY LOCATIONS MAP 218001 JAN 2018 NO SCALE THW SAC MCAS CHERRY POINTUST CLOSURE ANDMANAGEMENT PROGRAM S:\GIS Projects\CPLTM\GIS\Sites\CAMP Figure 1.mxd MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 SITE 3996 7.0 EXECUTIVE SUMMARY 7.1 SITE INFORMATION Site Location: MCAS Cherry Point Incident Number(s): 31591 NC State Plane Coordinates (NAD83): x = 2,632,699.36; y = 426,278.98 Risk Classification: MCAS temporarily assigned INTERMEDIATE risk due to presence of free-phase product. Source Type(s): JP-5, Diesel, AV Gasoline, Waste Oil/Hydraulic Fluid 7.2 MONITORING EVENT INFORMATION Sampling Performed By: SDC Group, Inc./GES (Annual in August, except only 74GW23 also gets sampled in February.) Date(s) of This Monitoring Event: 8/14/2018, 11/13/2018 (74GW23 only) Date(s) of Previous Monitoring Event: 2/19/2018 Reason(s) for This Monitoring Event: Track migration and attenuation of dissolved-phase plume, track migration and/or volume reduction of free-phase product plume. Site Monitoring Status at Time of This Event: Interim and product recovery monitoring. 7.3 GROUNDWATER HYDRAULICS Hydraulic Conductivity: Upper Surficial Aquifer = 66.0 feet/day Effective Porosity: Upper Surficial Aquifer = 0.25 Hydraulic Gradient: Upper Surficial Aquifer 0.0169 feet/feet Average Linear Groundwater Flow Velocity: Upper Surficial Aquifer = 4.4742 feet/day Groundwater Flow Direction: Upper Surficial Aquifer = East-Northeast (eastern) and West-Southwest (western). See Figure 7.1. Range of Measured Water Table Elevations: Ranges from 16.54 feet in well 72GW63 to 23.08 feet in well 74GW23. See Table 7.1A. Significant Changes from Previously Reported Data: None. 7.4 FREE PRODUCT PLUME Free Product Present: No Free Product Thickness Measured: During the Second Semester 2018 sampling event, 37 wells were gauged, of which none contained a measurable thickness of free-phase product. See Tables 7.1A and 7.1B. Plume Size and Location: See Figure 7.1. Free Product Removed from Site This Period: None Significant Changes from Previously Reported Data: No free-phase product was detected during the Second Semester 2018 reporting period. Free product was last detected in monitoring well 74GW16 in April 2013. MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 7.5 DISSOLVED-PHASE PLUME Plume Concentrations: See Tables 7.2A through 7.3B. Plume Size and Location: See Figures 7.2 through 7.3. Significant Changes from Previously Reported Data: SM 6200B (The EPA Method 602 analytical list was utilized until the First Semester 2013 sampling event, where it was replaced with the full SM 6200B analytical list) During the August 2017 monitoring event (in which both shallow and deep wells were sampled), SM 6200B contaminant concentrations exceeding their respective 2L Standards were revealed in these wells as follows: 1,1- Dichloroethane (74GW16), Benzene (72GW52A, 72GW62, 74GW16, 74GW23), Isopropylbenzene (74GW23), Naphthalene (74GW16), Toluene (74GW23), Total Xylenes (74GW23), Tricholoroethene (72GW52A and 74GW29) and Vinyl Chloride (74GW16). During the previous (February 2018) monitoring event, in which only shallow monitoring well 74GW23 was sampled, contaminant concentrations of Benzene, Isopropylbenzene, Toluene and Total Xylenes were again revealed above their respective 2L Standards. During the current (August 2018) monitoring event (in which both shallow and deep wells were sampled), SM 6200B contaminant concentrations exceeding their respective 2L Standards were revealed in these wells as follows: 1,1- Dichloroethane (74GW16), Benzene (72GW52A, 74GW16 and 74GW23), Isopropylbenzene (74GW23), Naphthalene (74GW16), Tricholoroethene (72GW52A and 74GW29) and Vinyl Chloride (74GW16). Shallow monitoring well 74GW23 was also sampled in November 2018 and revealed SM 6200B contaminant concentrations of Benzene, Isopropylbenzene and Total Xylenes exceeding the 2L Standards. Standard Method 6200B plume boundaries have been modified based on the current monitoring event’s analytical data. See Tables 7.2A, 7.2B and Figure 7.2. EPA Method 610 by EPA Method 625 During the August 2017 monitoring event (in which both shallow and deep wells were sampled), EPA Method 610 contaminant concentrations of 2- Methylnaphthalene and Naphthalene above their respective 2L Standards were revealed in monitoring well 74GW16. During the previous (February 2018) monitoring event, in which only shallow monitoring well 74GW23 was sampled, no EPA Method 610 contaminant concentrations were revealed above their respective 2L Standards. During the current (August 2018) monitoring event, in which both shallow and deep wells were sampled, monitoring well 74GW16 again revealed contaminant MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 concentrations of 2-Methylnaphthalene and Naphthalene above their respective 2L Standards. Shallow monitoring well 74GW23 was also sampled in November 2018 and no EPA Method 610 contaminant concentrations were revealed above their respective 2L Standards. EPA Method 610 plume boundaries have been modified based on the current monitoring event’s analytical data. See Tables 7.3A, 7.3B and Figure 7.3. Please note that site monitoring wells were not sampled if they were inaccessible or found to contain free-phase product. 7.6 REMEDIAL SYSTEM AIR MONITORING DATA AND EFFLUENT DISCHARGE DATA Air Contaminant Concentrations: See Table 7.4. Effluent Discharge Contaminant Concentrations: Not Applicable. 7.7 POTENTIAL RECEPTORS Contaminated Water Supply Well(s)?: No Potable Water Supply Well Within 1,000 Feet of Source Area?: No Any Water Supply Well Within 250 Feet of Source Area?: No Surface Water Body Within 500 Feet?: No Past Evidence of Vapors?: No. Two air quality monitoring reports previously developed by J.A. Jones revealed no vapor issues at either Building 130 or Building 140. However, vapors were discovered in Building 131 during a previous Air Sparge testing. Since this discovery, modifications have been made to the AS and SVE system to alleviate the problem. Significant Changes from Previously Reported Data?: None. 7.8 REMEDIATION Status: AS/SVE system was shut down in the beginning of January 2019 to facilitate site closure. Type: AS/SVE, and natural attenuation Progress: Ongoing Construction Contractor: J.A. Jones Operating Contractor: SDC Group, Inc./GES 7.9 OBSERVATIONS AND COMMENTS Historical: The Air Station O&M contractor, SDC Group, Inc. has historically operated the AS/SVE system. The AS/SVE system operated until early December 2013 at which time the air sparge system was shutdown due to water accumulating in the SVE lines which renders the SVE system ineffective to remove vapors from the air sparging. An investigation into the source of water entering the SVE lines began in early 2014. MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 Additional system improvements such as reconfigured control logic and air flow regulators have been implemented to optimize system operation. In addition, replacement of the ball valves and installation of sight glasses at the AS/SVE wells has been implemented to aid in the reduction of water accumulating in the SVE lines. Since air sparge operations have not been consistent over an extended time period, CATLIN continues to evaluate total system operations and has been monitoring the high benzene concentrations in well 74GW23. Groundwater samples from well 74GW23 have indicated Benzene concentrations between approximately 10,000 ug/L to 20,000 ug/L from 2009 to 2013. The groundwater sample from well 74GW23 in August 2014 indicated Benzene at a concentration of 6,820 ug/L which was a decrease in the historical concentrations, but the concentration is still above the GCL (5,000 ug/L) for this compound. Also, due to the high levels of contamination in this sample and the sample from well 74GW16 the laboratory had to dilute these samples and analyze them a second time. Unfortunately the re-analysis was conducted beyond the “hold” time for the SM 6200B method and therefore the reported results for these two wells are suspect. To address this situation, these shallow wells were resampled during the semi-annual sampling event in March 2015. The analytical results from March 2015 for the groundwater sample from well 74GW23 revealed Benzene at a concentration of 8,620 ug/L which is a decrease in the historical concentrations of 10,000 to 20,000 ug/L, but the concentration was still above the GCL (5,000 ug/L) for this compound. The investigation of the source of water entering the SVE lines was completed in the First Semester 2015 but the results were inconclusive. Pressure testing of the system was conducted and the results of the pressure testing of the system indicated there are leaks in the piping system(s); however, these areas are inaccessible and can not be easily repaired. Therefore, attempting to fix the leaks in the system was determined to be cost prohibited; rather, a detailed plan was developed to restart the AS system in a staggered pattern and at specific pressures. The restarting of the AS/SVE system commenced on July 1, 2015. Between July and Mid-October 2015 continual adjustments were implemented in operating the AS/SVE. Over this time period the AS/SVE system operated periodically. By Mid-October 2015 the proper adjustments were made and from Mid-October through December 2015 the AS system operated effectively at the subject site. As of December 2015, the AS system was operating for approximately 11 hours per day, seven days per week. The AS system operated for approximately 11 hours per day, seven days per week during all of 2016 (January through December 2016), except for routine down time for any operation and maintenance activities. Also, the AS system operated for approximately 11 hours per day, seven days per week during the First Semester 2017 (January through June 2017). During the Second Semester 2017 (July through December 2017) the AS system operated for approximately 12 hours per day, seven days per week. The AS system operated for approximately 12 hours per day, seven days per MCAS Cherry Point FY-18; 218001VOL1.RPT42 CATLIN Engineers and Scientists CATLIN Project No. 218001 February 2019 week during the First Semester 2018 (January through June 2018), except for routine down time for any operation and maintenance activities. Current: The AS system operated for approximately 12 hours per day, seven days per week during the Second Semester 2018 (July through December 2018) except for routine down time for any operation and maintenance activities and weather shutdowns (i.e. Hurricane Florence in September 2018). The system operation appears to be positively influencing dissolved-phase contaminant concentrations based on their declining trend. The Benzene concentration in monitoring well 74GW23 is the main regulatory driver at the subject site. The Benzene concentration in this well over the past three and a half years is as follows:  August 2015 = 10,900 ug/L  February 2016 = 4,590 ug/L  August 2016 = 9,310 ug/L  February 2017 = 11,200 ug/L  August 2017 = 3,700 ug/L  February 2018 = 4,900 ug/L  August 2018 = 137 ug/L  November 2018 = 229 ug/L As documented above, the Benzene concentration in August 2015 was 10,900 ug/L and in February 2016 it dropped to 4,590 ug/L which was a significant reduction and below the GCL and appeared to be attributable to the increased air flow from the sustained air sparging operations. However, well 74GW23 was sampled again in August 2016 and the Benzene concentration was 9,310 ug/L which was an increase from February 2016. During the Second Semester 2016 decreased air flow from the remediation system was noted around well 74GW23. The February 2017 results again showed an increase in Benzene concentrations to 11,200 ug/L Therefore, AS system adjustments were implemented in an attempt to increase the influence in the vicinity of this monitoring well. Benzene results in this well from the August 2017 sampling event revealed a significant decrease to 3,700 ug/L. The February 2018 results showed a slight increase in Benzene concentrations to 4,900 ug/L which was still below the GCL for Benzene of 5,000 ug/L. Therefore, AS system adjustments were again implemented in an attempt to increase the influence in the vicinity of this monitoring well. The adjustments stated above appear to have been successful as the August 2018 and November 2018 sampling results revealed a significant decrease in the Benzene concentration in well 74GW23. Based on the significant reduction in the Benzene concentration in well 74GW23, it was decided to shut down the AS/SVE system in early January 2019. Site monitoring wells will be sampled in February 2019 to monitor for any rebound after system shutdown. The February 2019 sampling results will be evaluated to determine the next steps forward to move the site towards NFA status. SITE 3996 TABLE 7.1A FIELD MEASUREMENTS Well No TYPE STICKUPTOC 8/14/2018Date Measured: Product Thickness DTW/DTP BGSDTW/DTP Corrected GW Elevation -0.3524.25T-II72GW31 0.00 5.685.33 18.92 -0.3824.17T-III72GW32 0.00 7.026.64 17.53 -0.3123.54T-II72GW33 0.00 6.155.84 17.70 -0.3326.30T-II72GW34 0.00 8.117.78 18.52 -0.2625.49T-II72GW35 0.00 9.008.74 16.75 -0.3028.23T-II72GW52A 0.00 7.877.57 20.66 -0.2728.28T-III72GW53A 0.00 7.617.34 20.94 -0.1823.81T-II72GW62 0.00 7.397.21 16.60 -0.1923.79T-III72GW63 0.00 7.447.25 16.54 -0.2924.23T-II74GW01 0.00 6.766.47 17.76 -0.4424.15T-III74GW02 0.00 6.836.39 17.76 -0.3926.70T-II74GW03 0.00 9.268.87 17.83 0.0025.93T-II74GW04 0.00 7.547.54 18.39 -0.3025.66T-II74GW05 0.00 7.797.49 18.17 -0.3025.40T-III74GW06 0.00 9.018.71 16.69 -0.2725.41T-II74GW07 0.00 7.717.44 17.97 -0.3425.48T-II74GW08 0.00 7.557.21 18.27 -0.3325.68T-II74GW09 0.00 7.987.65 18.03 -0.3725.49T-II74GW10 0.00 7.427.05 18.44 -0.3825.69T-II74GW11 0.00 7.817.43 18.26 -0.4025.54T-II74GW12 0.00 7.687.28 18.26 -0.3625.64T-II74GW13 0.00 8.127.76 17.88 -0.4124.72T-II74GW14 0.00 7.326.91 17.81 -0.2925.64T-II74GW15 0.00 8.358.06 17.58 -0.2723.90T-II74GW16 0.00 6.406.13 17.77 -0.3625.41T-II74GW17 0.00 7.587.22 18.19 -0.4124.06T-II74GW19 0.00 6.626.21 17.85 -0.3124.33T-III74GW20 0.00 6.896.58 17.75 -0.4023.40T-II74GW21 0.00 5.975.57 17.83 -0.3623.39T-III74GW22 0.00 5.965.60 17.79 -0.4327.86T-II74GW23 0.00 5.214.78 23.08 Page 1 Notes: 1. T-l = Type l monitoring well T-II = Type II monitoring well T-III = Type III monitoring well RW = Recovery well 2. TOC = Top of well casing elevation, in feet relative to Mean Sea Level. 3. STICK UP = Height of well casing above land surface in feet. 4. DTW = Depth to water (in feet) from top of well casing. 5. DTP = Depth to product (in feet) from top of well casing. 6. Product thickness is measured in feet. 7. DTW/DTP BGS = Depth to water/depth to product below ground surface in feet. 8. GW Elevation = Ground water elevation (adjusted for product) in feet. 9. A zero ("0.00") in the product thickness column indicates no measureable thickness. 10. Stick up values were not available for wells with no values in the STICK UP and DTW/DTP BGS columns. 11. Corrected GW Elevation based on Specific Gravity of JP-5 (0.82) Well No TYPE STICKUPTOC 8/14/2018Date Measured: Product Thickness DTW/DTP BGSDTW/DTP Corrected GW Elevation -0.2628.06T-III74GW24 0.00 7.587.32 20.74 -0.4023.85T-II74GW25 0.00 7.567.16 16.69 0.0023.51T-III74GW26 0.00 5.965.96 17.55 0.0023.52T-III74GW27 0.00 3.693.69 19.83 0.0023.64T-III74GW28 0.00 6.036.03 17.61 -0.5025.79T-II74GW29 0.00 7.456.95 18.84 Page 2 Notes: 1. T-l = Type l monitoring well T-II = Type II monitoring well T-III = Type III monitoring well RW = Recovery well 2. TOC = Top of well casing elevation, in feet relative to Mean Sea Level. 3. STICK UP = Height of well casing above land surface in feet. 4. DTW = Depth to water (in feet) from top of well casing. 5. DTP = Depth to product (in feet) from top of well casing. 6. Product thickness is measured in feet. 7. DTW/DTP BGS = Depth to water/depth to product below ground surface in feet. 8. GW Elevation = Ground water elevation (adjusted for product) in feet. 9. A zero ("0.00") in the product thickness column indicates no measureable thickness. 10. Stick up values were not available for wells with no values in the STICK UP and DTW/DTP BGS columns. 11. Corrected GW Elevation based on Specific Gravity of JP-5 (0.82) TABLE 7.1B SITE 3996 HISTORICAL FIELD MEASUREMENT DATA Well ID Date Corrected GWT ElevationProduct ThicknessTOCStickupDTW/DTP DTW/DTP BGS 18.52NMT72GW31 2/16/2018 24.25 -0.35 5.73 6.08 18.92NMT72GW31 8/14/2018 24.25 -0.35 5.33 5.68 15.58NMT72GW32 2/16/2018 24.17 -0.38 8.59 8.97 17.53NMT72GW32 8/14/2018 24.17 -0.38 6.64 7.02 15.71NMT72GW33 2/16/2018 23.54 -0.31 7.83 8.14 17.70NMT72GW33 8/14/2018 23.54 -0.31 5.84 6.15 17.13NMT72GW34 1/9/2018 26.3 -0.33 9.17 9.50 17.73NMT72GW34 2/16/2018 26.3 -0.33 8.57 8.90 16.05NMT72GW34 3/6/2018 26.3 -0.33 10.25 10.58 16.28NMT72GW34 4/3/2018 26.3 -0.33 10.02 10.35 17.84NMT72GW34 5/16/2018 26.3 -0.33 8.46 8.79 18.03NMT72GW34 6/5/2018 26.3 -0.33 8.27 8.60 17.45NMT72GW34 7/2/2018 26.3 -0.33 8.85 9.18 18.52NMT72GW34 8/14/2018 26.3 -0.33 7.78 8.11 17.49NMT72GW34 9/5/2018 26.3 -0.33 8.81 9.14 17.86NMT72GW34 10/8/2018 26.3 -0.33 8.44 8.77 16.97NMT72GW34 11/1/2018 26.3 -0.33 9.33 9.66 17.06NMT72GW34 12/6/2018 26.3 -0.33 9.24 9.57 15.41NMT72GW35 2/16/2018 25.49 -0.26 10.08 10.34 16.75NMT72GW35 8/14/2018 25.49 -0.26 8.74 9.00 19.50NMT72GW52A 2/16/2018 28.23 -0.3 8.73 9.03 20.66NMT72GW52A 8/14/2018 28.23 -0.3 7.57 7.87 19.85NMT72GW53A 2/16/2018 28.28 -0.27 8.43 8.70 20.94NMT72GW53A 8/14/2018 28.28 -0.27 7.34 7.61 15.24NMT72GW62 2/16/2018 23.81 -0.18 8.57 8.75 16.60NMT72GW62 8/14/2018 23.81 -0.18 7.21 7.39 14.27NMT72GW63 2/16/2018 23.79 -0.19 9.52 9.71 16.54NMT72GW63 8/14/2018 23.79 -0.19 7.25 7.44 Notes: 1. NMT = No Measurable Thickness 2. NM = Not Measured 3. Data in BOLD ITALICS indicates measurable thicknesses of product detected 4. TBM = To Be Measured 5. Corrected GW Elevation based on Specific Gravity of JP-5 (0.82) Page 1BOLD ITALICS TABLE 7.1B SITE 3996 HISTORICAL FIELD MEASUREMENT DATA Well ID Date Corrected GWT ElevationProduct ThicknessTOCStickupDTW/DTP DTW/DTP BGS 17.36NMT74GW01 2/16/2018 24.23 -0.29 6.87 7.16 17.76NMT74GW01 8/14/2018 24.23 -0.29 6.47 6.76 16.47NMT74GW02 2/16/2018 24.15 -0.44 7.68 8.12 17.76NMT74GW02 8/14/2018 24.15 -0.44 6.39 6.83 16.86NMT74GW03 2/16/2018 26.7 -0.39 9.84 10.23 17.83NMT74GW03 8/14/2018 26.7 -0.39 8.87 9.26 17.17NMT74GW04 2/16/2018 25.93 0 8.76 8.76 18.39NMT74GW04 8/14/2018 25.93 0 7.54 7.54 16.75NMT74GW05 2/16/2018 25.66 -0.3 8.91 9.21 18.17NMT74GW05 8/14/2018 25.66 -0.3 7.49 7.79 16.54NMT74GW06 2/16/2018 25.4 -0.3 8.86 9.16 16.69NMT74GW06 8/14/2018 25.4 -0.3 8.71 9.01 16.93NMT74GW07 2/16/2018 25.41 -0.27 8.48 8.75 17.97NMT74GW07 8/14/2018 25.41 -0.27 7.44 7.71 16.70NMT74GW08 2/16/2018 25.48 -0.34 8.78 9.12 18.27NMT74GW08 8/14/2018 25.48 -0.34 7.21 7.55 16.93NMT74GW09 2/16/2018 25.68 -0.33 8.75 9.08 18.03NMT74GW09 8/14/2018 25.68 -0.33 7.65 7.98 Notes: 1. NMT = No Measurable Thickness 2. NM = Not Measured 3. Data in BOLD ITALICS indicates measurable thicknesses of product detected 4. TBM = To Be Measured 5. Corrected GW Elevation based on Specific Gravity of JP-5 (0.82) Page 2BOLD ITALICS TABLE 7.1B SITE 3996 HISTORICAL FIELD MEASUREMENT DATA Well ID Date Corrected GWT ElevationProduct ThicknessTOCStickupDTW/DTP DTW/DTP BGS 16.49NMT74GW10 1/9/2018 25.49 -0.37 9 9.37 16.74NMT74GW10 2/16/2018 25.49 -0.37 8.75 9.12 16.81NMT74GW10 3/6/2018 25.49 -0.37 8.68 9.05 16.72NMT74GW10 4/3/2018 25.49 -0.37 8.77 9.14 17.09NMT74GW10 5/16/2018 25.49 -0.37 8.4 8.77 17.02NMT74GW10 6/5/2018 25.49 -0.37 8.47 8.84 17.27NMT74GW10 7/2/2018 25.49 -0.37 8.22 8.59 18.44NMT74GW10 8/14/2018 25.49 -0.37 7.05 7.42 17.86NMT74GW10 9/5/2018 25.49 -0.37 7.63 8.00 17.70NMT74GW10 10/8/2018 25.49 -0.37 7.79 8.16 17.30NMT74GW10 11/1/2018 25.49 -0.37 8.19 8.56 17.20NMT74GW10 12/6/2018 25.49 -0.37 8.29 8.66 16.83NMT74GW11 2/16/2018 25.69 -0.38 8.86 9.24 18.26NMT74GW11 8/14/2018 25.69 -0.38 7.43 7.81 16.80NMT74GW12 2/16/2018 25.54 -0.4 8.74 9.14 18.26NMT74GW12 8/14/2018 25.54 -0.4 7.28 7.68 17.05NMT74GW13 2/16/2018 25.64 -0.36 8.59 8.95 17.88NMT74GW13 8/14/2018 25.64 -0.36 7.76 8.12 15.96NMT74GW14 2/16/2018 24.72 -0.41 8.76 9.17 17.81NMT74GW14 8/14/2018 24.72 -0.41 6.91 7.32 Notes: 1. NMT = No Measurable Thickness 2. NM = Not Measured 3. Data in BOLD ITALICS indicates measurable thicknesses of product detected 4. TBM = To Be Measured 5. Corrected GW Elevation based on Specific Gravity of JP-5 (0.82) Page 3BOLD ITALICS TABLE 7.1B SITE 3996 HISTORICAL FIELD MEASUREMENT DATA Well ID Date Corrected GWT ElevationProduct ThicknessTOCStickupDTW/DTP DTW/DTP BGS 16.22NMT74GW15 1/9/2018 25.64 -0.29 9.42 9.71 16.97NMT74GW15 2/16/2018 25.64 -0.29 8.67 8.96 15.55NMT74GW15 3/6/2018 25.64 -0.29 10.09 10.38 15.52NMT74GW15 4/3/2018 25.64 -0.29 10.12 10.41 15.58NMT74GW15 5/16/2018 25.64 -0.29 10.06 10.35 15.58NMT74GW15 6/5/2018 25.64 -0.29 10.06 10.35 15.47NMT74GW15 7/2/2018 25.64 -0.29 10.17 10.46 17.58NMT74GW15 8/14/2018 25.64 -0.29 8.06 8.35 16.45NMT74GW15 9/5/2018 25.64 -0.29 9.19 9.48 15.81NMT74GW15 10/8/2018 25.64 -0.29 9.83 10.12 15.57NMT74GW15 11/1/2018 25.64 -0.29 10.07 10.36 15.21NMT74GW15 12/6/2018 25.64 -0.29 10.43 10.72 16.36NMT74GW16 1/9/2018 23.9 -0.27 7.54 7.81 15.73NMT74GW16 2/16/2018 23.9 -0.27 8.17 8.44 15.57NMT74GW16 3/6/2018 23.9 -0.27 8.33 8.60 15.17NMT74GW16 4/3/2018 23.9 -0.27 8.73 9.00 15.07NMT74GW16 5/16/2018 23.9 -0.27 8.83 9.10 15.63NMT74GW16 6/5/2018 23.9 -0.27 8.27 8.54 16.57NMT74GW16 7/2/2018 23.9 -0.27 7.33 7.60 17.77NMT74GW16 8/14/2018 23.9 -0.27 6.13 6.40 17.03NMT74GW16 9/5/2018 23.9 -0.27 6.87 7.14 16.83NMT74GW16 10/8/2018 23.9 -0.27 7.07 7.34 16.42NMT74GW16 11/1/2018 23.9 -0.27 7.48 7.75 17.28NMT74GW16 12/6/2018 23.9 -0.27 6.62 6.89 16.92NMT74GW17 2/16/2018 25.41 -0.36 8.49 8.85 18.19NMT74GW17 8/14/2018 25.41 -0.36 7.22 7.58 17.25NMT74GW18 2/16/2018 26.96 -0.38 9.71 10.09 17.02NMT74GW19 2/16/2018 24.06 -0.41 7.04 7.45 17.85NMT74GW19 8/14/2018 24.06 -0.41 6.21 6.62 Notes: 1. NMT = No Measurable Thickness 2. NM = Not Measured 3. Data in BOLD ITALICS indicates measurable thicknesses of product detected 4. TBM = To Be Measured 5. Corrected GW Elevation based on Specific Gravity of JP-5 (0.82) Page 4BOLD ITALICS TABLE 7.1B SITE 3996 HISTORICAL FIELD MEASUREMENT DATA Well ID Date Corrected GWT ElevationProduct ThicknessTOCStickupDTW/DTP DTW/DTP BGS 16.86NMT74GW20 2/16/2018 24.33 -0.31 7.47 7.78 17.75NMT74GW20 8/14/2018 24.33 -0.31 6.58 6.89 17.05NMT74GW21 2/16/2018 23.4 -0.4 6.35 6.75 17.83NMT74GW21 8/14/2018 23.4 -0.4 5.57 5.97 17.07NMT74GW22 2/16/2018 23.39 -0.36 6.32 6.68 17.79NMT74GW22 8/14/2018 23.39 -0.36 5.6 5.96 19.67NMT74GW23 1/9/2018 27.86 -0.43 8.19 8.62 20.59NMT74GW23 2/16/2018 27.86 -0.43 7.27 7.70 18.83NMT74GW23 3/6/2018 27.86 -0.43 9.03 9.46 19.36NMT74GW23 4/3/2018 27.86 -0.43 8.5 8.93 19.42NMT74GW23 5/16/2018 27.86 -0.43 8.44 8.87 19.46NMT74GW23 6/5/2018 27.86 -0.43 8.4 8.83 18.80NMT74GW23 7/2/2018 27.86 -0.43 9.06 9.49 23.08NMT74GW23 8/14/2018 27.86 -0.43 4.78 5.21 20.47NMT74GW23 9/5/2018 27.86 -0.43 7.39 7.82 19.42NMT74GW23 10/8/2018 27.86 -0.43 8.44 8.87 19.22NMT74GW23 11/1/2018 27.86 -0.43 8.64 9.07 21.18NMT74GW23 11/13/2018 27.86 -0.43 6.68 7.11 18.93NMT74GW23 12/6/2018 27.86 -0.43 8.93 9.36 Notes: 1. NMT = No Measurable Thickness 2. NM = Not Measured 3. Data in BOLD ITALICS indicates measurable thicknesses of product detected 4. TBM = To Be Measured 5. Corrected GW Elevation based on Specific Gravity of JP-5 (0.82) Page 5BOLD ITALICS TABLE 7.1B SITE 3996 HISTORICAL FIELD MEASUREMENT DATA Well ID Date Corrected GWT ElevationProduct ThicknessTOCStickupDTW/DTP DTW/DTP BGS 19.61NMT74GW24 1/9/2018 28.06 -0.26 8.45 8.71 18.80NMT74GW24 2/16/2018 28.06 -0.26 9.26 9.52 18.72NMT74GW24 3/6/2018 28.06 -0.26 9.34 9.60 18.59NMT74GW24 4/3/2018 28.06 -0.26 9.47 9.73 18.65NMT74GW24 5/16/2018 28.06 -0.26 9.41 9.67 18.82NMT74GW24 6/5/2018 28.06 -0.26 9.24 9.50 18.39NMT74GW24 7/2/2018 28.06 -0.26 9.67 9.93 20.74NMT74GW24 8/14/2018 28.06 -0.26 7.32 7.58 19.55NMT74GW24 9/5/2018 28.06 -0.26 8.51 8.77 19.07NMT74GW24 10/8/2018 28.06 -0.26 8.99 9.25 18.71NMT74GW24 11/1/2018 28.06 -0.26 9.35 9.61 19.18NMT74GW24 12/6/2018 28.06 -0.26 8.88 9.14 16.58NMT74GW25 2/16/2018 23.85 -0.4 7.27 7.67 16.69NMT74GW25 8/14/2018 23.85 -0.4 7.16 7.56 16.82NMT74GW26 2/16/2018 23.51 0 6.69 6.69 17.55NMT74GW26 8/14/2018 23.51 0 5.96 5.96 16.94NMT74GW27 2/16/2018 23.52 0 6.58 6.58 19.83NMT74GW27 8/14/2018 23.52 0 3.69 3.69 16.91NMT74GW28 2/16/2018 23.64 0 6.73 6.73 17.61NMT74GW28 8/14/2018 23.64 0 6.03 6.03 17.74NMT74GW29 2/16/2018 25.79 -0.5 8.05 8.55 18.84NMT74GW29 8/14/2018 25.79 -0.5 6.95 7.45 Notes: 1. NMT = No Measurable Thickness 2. NM = Not Measured 3. Data in BOLD ITALICS indicates measurable thicknesses of product detected 4. TBM = To Be Measured 5. Corrected GW Elevation based on Specific Gravity of JP-5 (0.82) Page 6BOLD ITALICS C72GW33 72GW34 72GW52A 72GW62 74GW10 74GW15 74GW17 74GW23 74GW24 74GW24Dup 74GW29 GROUNDWATER LABORATORY ANALYTICAL RESULTSSITE 3996TABLE 7.2A8/14/2018Date Sampled:2L GWQSUNITSPARAMETER74GW16 GCLEquip_ Rinsate SM 6200B1,1,1,2-Tetrachloroethane 1,000.00001.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,1,1-Trichloroethane 200,000.0000200.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,1,2,2-Tetrachloroethane 200.00000.20000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,1,2-Trichloroethane 600.00000.60000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,1-Dichloroethane 6,000.00006.00000.00 0.00 0.00 0.00 0.00 0.0088.10.000.000.00 0.00 0.00ug/L0.001,1-Dichloroethene 350,000.0000350.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,1-Dichloropropene 0.00000.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,2,3-Trichlorobenzene 0.00000.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,2,3-Trichloropropane 0.00000.00500.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,2,4-Trichlorobenzene 70,000.000070.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,2,4-Trimethylbenzene 28,500.0000400.00000.00 0.00 0.00 0.00 0.00 0.0064.50.0048.30.00 0.00 0.00ug/L0.001,2-Dibromo-3-chloropropane 0.00000.04000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,2-Dibromoethane (EDB)50.00000.02000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,2-Dichlorobenzene 20,000.000020.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,2-Dichloroethane 400.00000.40000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,2-Dichloropropane 600.00000.60000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,3,5-Trimethylbenzene 25,000.0000400.00000.00 0.00 0.00 0.00 0.00 0.0031.70.0025.40.00 0.00 0.00ug/L0.001,3-Dichlorobenzene 61,500.0000200.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,3-Dichloropropane 0.00000.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.001,4-Dichlorobenzene 6,000.00006.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.002,2-Dichloropropane 0.00000.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.002-Chlorotoluene 0.0000100.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Page 1Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. ug/L = Micrograms per Liter 4. A zero ("0.00") in the results column indicates concentration is either below detection limit or below quantitation limit 5. A zero ("0.0000") in the 2L GWQS column indicates the 2L standard is equal to the laboratory detection limit 6. A zero ("0.0000") in the GCL column indicates a GCL has not been established C72GW33 72GW34 72GW52A 72GW62 74GW10 74GW15 74GW17 74GW23 74GW24 74GW24Dup 74GW29 GROUNDWATER LABORATORY ANALYTICAL RESULTSSITE 3996TABLE 7.2A8/14/2018Date Sampled:2L GWQSUNITSPARAMETER74GW16 GCLEquip_ Rinsate SM 6200B4-Chlorotoluene 7,500.000024.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Benzene 5,000.00001.00000.00 0.00 13.1 0.00 0.00 0.003.320.001370.00 0.00 0.00ug/L0.00Bromobenzene 0.00000.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Bromochloromethane 0.00000.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Bromodichloromethane 0.00000.60000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Bromoform 4,000.00004.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Bromomethane 10,000.000010.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Carbon tetrachloride 0.00000.30000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Chlorobenzene 50,000.000050.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Chloroethane 0.00003,000.00000.00 0.00 0.00 0.00 0.00 0.005.930.000.000.00 0.00 0.00ug/L0.00Chloroform 70,000.000070.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Chloromethane 3,000.00003.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00cis-1,2-Dichloroethene 70,000.000070.00000.00 0.00 1.06 1.71 0.00 0.002.090.000.000.00 0.00 0.00ug/L0.00cis-1,3-Dichloropropene 400.00000.40000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Dibromochloromethane 400.00000.40000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Dibromomethane 0.000070.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Dichlorodifluoromethane 140,000.00001,000.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Diisopropyl ether (DIPE)70,000.000070.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Ethylbenzene 84,500.0000600.00000.00 0.00 7.21 0.00 0.00 0.0017.40.00450.00 0.00 0.00ug/L0.00Hexachlorobutadiene 400.00000.40000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Isopropylbenzene 25,000.000070.000053.3 0.00 59.7 0.00 0.00 0.0013.20.001340.00 0.00 0.00ug/L0.00Methylene chloride 5,000.00005.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Page 2Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. ug/L = Micrograms per Liter 4. A zero ("0.00") in the results column indicates concentration is either below detection limit or below quantitation limit 5. A zero ("0.0000") in the 2L GWQS column indicates the 2L standard is equal to the laboratory detection limit 6. A zero ("0.0000") in the GCL column indicates a GCL has not been established C72GW33 72GW34 72GW52A 72GW62 74GW10 74GW15 74GW17 74GW23 74GW24 74GW24Dup 74GW29 GROUNDWATER LABORATORY ANALYTICAL RESULTSSITE 3996TABLE 7.2A8/14/2018Date Sampled:2L GWQSUNITSPARAMETER74GW16 GCLEquip_ Rinsate SM 6200BMethyl-tert butyl ether (MTBE)20,000.000020.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Naphthalene 6,000.00006.00000.00 0.00 1.24 0.00 0.00 0.0092.50.000.000.00 0.00 0.00ug/L0.00n-Butylbenzene 6,900.000070.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00n-Propyl benzene 30,000.000070.00000.00 0.00 0.00 0.00 0.00 0.004.120.003.50.00 0.00 0.00ug/L0.00sec-Butylbenzene 8,500.000070.00000.00 0.00 0.00 0.00 0.00 0.002.60.000.000.00 0.00 0.00ug/L0.00Styrene 70,000.000070.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00tert-Butylbenzene 15,000.000070.00001.64 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Tetrachloroethene 700.00000.70000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Toluene 260,000.0000600.00000.00 0.00 8.88 0.00 0.00 0.002.590.001130.00 0.00 0.00ug/L0.00Total Xylenes 85,500.0000500.00000.00 0.00 15.5 0.00 0.00 0.0029.10.002540.00 0.00 0.00ug/L0.00trans-1,2-dichloroethene 100,000.0000100.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00trans-1,3-Dichloropropene 400.00000.40000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Trichloroethene 3,000.00003.00000.00 0.00 3.71 0.00 0.00 0.000.000.000.000.00 0.00 4ug/L0.00Trichlorofluoromethane 2,000,000.00002,000.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Vinyl chloride 30.00000.03000.00 0.00 0.00 0.00 0.00 0.002.360.000.000.00 0.00 0.00ug/L0.00Totals:54.94 0.00 110.41.710.00 0.00 359.510.00760.20.00 0.00 4 0.00Page 3Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. ug/L = Micrograms per Liter 4. A zero ("0.00") in the results column indicates concentration is either below detection limit or below quantitation limit 5. A zero ("0.0000") in the 2L GWQS column indicates the 2L standard is equal to the laboratory detection limit 6. A zero ("0.0000") in the GCL column indicates a GCL has not been established C74GW23 GROUNDWATER LABORATORY ANALYTICAL RESULTSSITE 3996TABLE 7.2A (Continued)11/13/2018Date Sampled:SM 6200B2L GWQSUNITSPARAMETERGCL1,1,1,2-Tetrachloroethane 1,000.00001.00000.00ug/L1,1,1-Trichloroethane 200,000.0000200.00000.00ug/L1,1,2,2-Tetrachloroethane 200.00000.20000.00ug/L1,1,2-Trichloroethane 600.00000.60000.00ug/L1,1-Dichloroethane 6,000.00006.00000.00ug/L1,1-Dichloroethene 350,000.0000350.00000.00ug/L1,1-Dichloropropene 0.00000.00000.00ug/L1,2,3-Trichlorobenzene 0.00000.00000.00ug/L1,2,3-Trichloropropane 0.00000.00500.00ug/L1,2,4-Trichlorobenzene 70,000.000070.00000.00ug/L1,2,4-Trimethylbenzene 28,500.0000400.0000123ug/L1,2-Dibromo-3-chloropropane 0.00000.04000.00ug/L1,2-Dibromoethane (EDB)50.00000.02000.00ug/L1,2-Dichlorobenzene 20,000.000020.00000.00ug/L1,2-Dichloroethane 400.00000.40000.00ug/L1,2-Dichloropropane 600.00000.60000.00ug/L1,3,5-Trimethylbenzene 25,000.0000400.000084.5ug/L1,3-Dichlorobenzene 61,500.0000200.00000.00ug/L1,3-Dichloropropane 0.00000.00000.00ug/L1,4-Dichlorobenzene 6,000.00006.00000.00ug/L2,2-Dichloropropane 0.00000.00000.00ug/L2-Chlorotoluene 0.0000100.00000.00ug/L4-Chlorotoluene 7,500.000024.00000.00ug/LBenzene 5,000.00001.0000229ug/LBromobenzene 0.00000.00000.00ug/LBromochloromethane 0.00000.00000.00ug/LBromodichloromethane 0.00000.60000.00ug/LBromoform 4,000.00004.00000.00ug/LBromomethane 10,000.000010.00000.00ug/LCarbon tetrachloride 0.00000.30000.00ug/LPage 4Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. ug/L = Micrograms per Liter 4. A zero ("0.00") in the results column indicates concentration is either below detection limit or below quantitation limit 5. A zero ("0.0000") in the 2L GWQS column indicates the 2L standard is equal to the laboratory detection limit 6. A zero ("0.0000") in the GCL column indicates a GCL has not been established C74GW23 GROUNDWATER LABORATORY ANALYTICAL RESULTSSITE 3996TABLE 7.2A (Continued)11/13/2018Date Sampled:SM 6200B2L GWQSUNITSPARAMETERGCLChlorobenzene 50,000.000050.00000.00ug/LChloroethane 0.00003,000.00000.00ug/LChloroform 70,000.000070.00000.00ug/LChloromethane 3,000.00003.00000.00ug/Lcis-1,2-Dichloroethene 70,000.000070.00000.00ug/Lcis-1,3-Dichloropropene 400.00000.40000.00ug/LDibromochloromethane 400.00000.40000.00ug/LDibromomethane 0.000070.00000.00ug/LDichlorodifluoromethane 140,000.00001,000.00000.00ug/LDiisopropyl ether (DIPE)70,000.000070.00000.00ug/LEthylbenzene 84,500.0000600.0000109ug/LHexachlorobutadiene 400.00000.40000.00ug/LIsopropylbenzene 25,000.000070.0000283ug/LMethylene chloride 5,000.00005.00000.00ug/LMethyl-tert butyl ether (MTBE)20,000.000020.00000.00ug/LNaphthalene 6,000.00006.00000.00ug/Ln-Butylbenzene 6,900.000070.00000.00ug/Ln-Propyl benzene 30,000.000070.00007.35ug/Lsec-Butylbenzene 8,500.000070.00000.00ug/LStyrene 70,000.000070.00000.00ug/Ltert-Butylbenzene 15,000.000070.00000.00ug/LTetrachloroethene 700.00000.70000.00ug/LToluene 260,000.0000600.0000197ug/LTotal Xylenes 85,500.0000500.0000703ug/Ltrans-1,2-dichloroethene 100,000.0000100.00000.00ug/Ltrans-1,3-Dichloropropene 400.00000.40000.00ug/LTrichloroethene 3,000.00003.00000.00ug/LTrichlorofluoromethane 2,000,000.00002,000.00000.00ug/LVinyl chloride 30.00000.03000.00ug/LTotals:1,735.85Page 5Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. ug/L = Micrograms per Liter 4. A zero ("0.00") in the results column indicates concentration is either below detection limit or below quantitation limit 5. A zero ("0.0000") in the 2L GWQS column indicates the 2L standard is equal to the laboratory detection limit 6. A zero ("0.0000") in the GCL column indicates a GCL has not been established 1,1-Dichloroethane 1,2,4-Trimethylbenzene 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene ChloroethaneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996TABLE 7.2BSM 6200BDateBromodichloromethane Sample IDChloroform cis-1,2-Dichloroethene Dichlorodifluoromethane Isopropylbenzene Ethylbenzene Naphthalene Methyl-tert butyl ether (MTBE)6 400 0.4 400 1 0.6 3000 70 70 1000 600 70 20 62L GWQSGCL6000 28500 400 25000 5000 0 0 70000 70000 140000 84500 25000 20000 6000Contaminant of Concernn-Butylbenzene n-Propyl benzene sec-Butylbenzene Styrene tert-Butylbenzene Toluene Total Xylenes Trichloroethene Trichlorofluoromethane Vinyl chloride All Other Analytes 7069007030000708500707000070150006002600005008550033000200020000000.0330GW Standard Revised/Estab. (See Table III)8/14/2013BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW33BQLBQLBQLBQL0.34BQLBQLBQLBQLBQLBQL8/12/2014BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW33BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/18/2015BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW33BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/16/2016BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW33BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/15/2017BQLBQLBQLBQLBQLBQLBQLBQLBQLBQL1.046.3BQLBQL72GW33BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/14/2018BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL53.3BQLBQL72GW33BQLBQLBQLBQL1.64BQLBQLBQLBQLBQLBQL8/14/2013BQLBQLBQLBQL2.43BQLBQLBQLBQLBQLBQLBQLBQLBQL72GW34BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/12/2014BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW34BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/18/2015BQLBQLBQLBQL1.02BQLBQLBQLBQLBQLBQLBQLBQLBQL72GW34BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/16/2016BQLBQLBQLBQL1.84BQLBQLBQLBQLBQLBQL1.01BQLBQL72GW34BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/15/2017BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW34BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/14/2018BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW34BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/12/2014BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW35BQLBQLBQLBQLBQLBQLBQLBQL1.08BQLBQL8/18/2015BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW35BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/18/2015BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW35DupBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/16/2016BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW35BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/16/2016BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW35DupBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLNotes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 1 9. Well nomenclature in RED indicates the well has been abandoned 1,1-Dichloroethane 1,2,4-Trimethylbenzene 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene ChloroethaneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996TABLE 7.2BSM 6200BDateBromodichloromethane Sample IDChloroform cis-1,2-Dichloroethene Dichlorodifluoromethane Isopropylbenzene Ethylbenzene Naphthalene Methyl-tert butyl ether (MTBE)6 400 0.4 400 1 0.6 3000 70 70 1000 600 70 20 62L GWQSGCL6000 28500 400 25000 5000 0 0 70000 70000 140000 84500 25000 20000 6000Contaminant of Concernn-Butylbenzene n-Propyl benzene sec-Butylbenzene Styrene tert-Butylbenzene Toluene Total Xylenes Trichloroethene Trichlorofluoromethane Vinyl chloride All Other Analytes 7069007030000708500707000070150006002600005008550033000200020000000.0330GW Standard Revised/Estab. (See Table III)8/14/2013BQL16.7BQL1.512.4BQLBQLBQLBQLBQL36.8227BQLBQL72GW52ABQL3.95BQLBQLBQL37.961.57.9BQLBQLBQL8/12/2014BQL1BQLBQL2.12BQLBQLBQL1.23BQL2.2512.8BQL0.5872GW52ABQLBQLBQLBQLBQLBQL2.826.02BQLBQLBQL8/18/2015BQLBQLBQLBQL2.04BQLBQLBQL1.1BQLBQL16.6BQLBQL72GW52ABQLBQLBQLBQLBQLBQLBQL4.73BQLBQLBQL8/16/2016BQLBQLBQLBQL2.3BQLBQLBQLBQLBQLBQLBQLBQLBQL72GW52ABQLBQLBQLBQLBQLBQLBQL4.11BQLBQLBQL8/15/2017BQLBQLBQLBQL3.82BQLBQLBQL1.04BQLBQL54BQLBQL72GW52ABQL1.05BQLBQLBQLBQLBQL4.57BQLBQLBQL8/14/2018BQLBQLBQLBQL13.1BQLBQLBQL1.06BQL7.2159.7BQL1.2472GW52ABQLBQLBQLBQLBQL8.8815.53.71BQLBQLBQL2/20/2014BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW53ABQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL3/10/2015BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW53ABQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/14/20137.3BQLBQLBQL2.15BQLBQLBQL4.9BQLBQLBQLBQLBQL72GW62BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/12/201415.2BQLBQLBQL1.49BQLBQLBQL3.34BQLBQLBQLBQLBQL72GW62BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/18/20159.05BQLBQLBQL1.15BQLBQLBQL2.32BQLBQLBQLBQLBQL72GW62BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/16/20164.36BQLBQLBQLBQLBQLBQLBQL1.54BQLBQLBQLBQLBQL72GW62BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/15/20171.9BQLBQLBQL1.05BQLBQLBQL1.81BQLBQLBQLBQLBQL72GW62BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/14/2018BQLBQLBQLBQLBQLBQLBQLBQL1.71BQLBQLBQLBQLBQL72GW62BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL2/20/2014BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW63BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL3/10/2015BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL72GW63BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/12/2014BQLBQLBQLBQLBQLBQLBQLBQL1.35BQLBQLBQLBQLBQL74GW01BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/18/2015BQLBQLBQLBQLBQLBQLBQLBQL2.05BQLBQLBQLBQLBQL74GW01BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLNotes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 2 9. Well nomenclature in RED indicates the well has been abandoned 1,1-Dichloroethane 1,2,4-Trimethylbenzene 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene ChloroethaneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996TABLE 7.2BSM 6200BDateBromodichloromethane Sample IDChloroform cis-1,2-Dichloroethene Dichlorodifluoromethane Isopropylbenzene Ethylbenzene Naphthalene Methyl-tert butyl ether (MTBE)6 400 0.4 400 1 0.6 3000 70 70 1000 600 70 20 62L GWQSGCL6000 28500 400 25000 5000 0 0 70000 70000 140000 84500 25000 20000 6000Contaminant of Concernn-Butylbenzene n-Propyl benzene sec-Butylbenzene Styrene tert-Butylbenzene Toluene Total Xylenes Trichloroethene Trichlorofluoromethane Vinyl chloride All Other Analytes 7069007030000708500707000070150006002600005008550033000200020000000.0330GW Standard Revised/Estab. (See Table III)8/14/2013BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW100.56BQL1.25BQLBQLBQLBQLBQLBQLBQLBQL8/14/2013BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL0.3BQLBQL74GW10Dup0.56BQL1.25BQLBQLBQLBQLBQLBQLBQLBQL8/12/2014BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW10BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/12/2014BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW10DupBQLBQL0.33BQLBQLBQLBQLBQLBQLBQLBQL8/18/2015BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW10BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/16/2016BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW10BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/15/2017BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW10BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/14/2018BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW10BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/14/2013BQLBQLBQLBQLBQL3.58BQL25.8BQLBQLBQLBQLBQLBQL74GW14BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/12/2014BQLBQLBQLBQLBQL1.43BQL11.4BQLBQLBQLBQLBQLBQL74GW14BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/18/2015BQLBQLBQLBQLBQL2.41BQL28.5BQLBQLBQLBQLBQLBQL74GW14BQLBQLBQLBQLBQL1.11BQLBQLBQLBQLBQL8/16/2016BQLBQLBQLBQLBQLBQLBQL12.5BQLBQLBQLBQLBQLBQL74GW14BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/15/2017BQLBQLBQLBQLBQLBQLBQL34.2BQLBQLBQLBQLBQLBQL74GW14BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/14/2013BQL10.3BQL7.9BQLBQLBQLBQLBQLBQL4.3295BQL774GW1538.052.45BQL3.45BQL1.7BQLBQLBQLBQL8/12/2014BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL7.67BQLBQL74GW15BQL0.34BQLBQLBQLBQLBQLBQLBQLBQLBQL8/18/2015BQL1.14BQLBQL1.55BQLBQLBQLBQLBQL1.0447.6BQL6.3774GW15BQL1.881.42BQL1.02BQLBQLBQLBQLBQLBQL8/16/20167.04BQLBQLBQL4.26BQLBQLBQL1.37BQLBQLBQLBQLBQL74GW15BQLBQLBQLBQLBQL2.46BQLBQLBQLBQLBQL8/15/20171.02BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW15BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL8/14/2018BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW15BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLNotes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 3 9. Well nomenclature in RED indicates the well has been abandoned 1,1-Dichloroethane 1,2,4-Trimethylbenzene 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene ChloroethaneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996TABLE 7.2BSM 6200BDateBromodichloromethane Sample IDChloroform cis-1,2-Dichloroethene Dichlorodifluoromethane Isopropylbenzene Ethylbenzene Naphthalene Methyl-tert butyl ether (MTBE)6 400 0.4 400 1 0.6 3000 70 70 1000 600 70 20 62L GWQSGCL6000 28500 400 25000 5000 0 0 70000 70000 140000 84500 25000 20000 6000Contaminant of Concernn-Butylbenzene n-Propyl benzene sec-Butylbenzene Styrene tert-Butylbenzene Toluene Total Xylenes Trichloroethene Trichlorofluoromethane Vinyl chloride All Other Analytes 7069007030000708500707000070150006002600005008550033000200020000000.0330GW Standard Revised/Estab. (See Table III)8/14/201348.7136BQL3115.4BQL7.2BQL20.3BQL64.620.2BQL63174GW1619.914.96.95BQL2.836118BQLBQL39BQL8/12/201446.4116BQL29.810.6BQL6.53BQL2.38BQL51.916.4BQL39474GW16BQL10.45.131.292.1328106BQLBQL37.4BQL3/10/201533.264.5BQLBQL4.85BQL3.05BQLBQLBQL26.710.2BQL29474GW16BQL6.053.6BQL1.6511.437.4BQLBQL12.5BQL8/18/201561.894.7BQL21.98.17BQL5.49BQLBQL15.649.321.3BQL37174GW16BQL11.35.34BQL2.217.164.3BQLBQL18.8BQL8/16/201611999.4BQL20.58.75BQL8.5BQLBQLBQL76.646.8BQL43674GW16BQL14.15.65BQLBQL25.176.7BQLBQL48.5BQL8/15/201764.613.4BQL2.563.44BQL10.4BQL1.43BQL1812.6BQL52.774GW16BQL3.882.51BQL1.785.215.6BQLBQL12BQL8/14/201888.164.5BQL31.73.32BQL5.93BQL2.09BQL17.413.2BQL92.574GW16BQL4.122.6BQLBQL2.5929.1BQLBQL2.36BQL8/14/2013BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL0.46BQL74GW17BQLBQLBQLBQLBQLBQLBQL0.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: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 4 9. Well nomenclature in RED indicates the well has been abandoned 1,1-Dichloroethane 1,2,4-Trimethylbenzene 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene ChloroethaneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996TABLE 7.2BSM 6200BDateBromodichloromethane Sample IDChloroform cis-1,2-Dichloroethene Dichlorodifluoromethane Isopropylbenzene Ethylbenzene Naphthalene Methyl-tert butyl ether (MTBE)6 400 0.4 400 1 0.6 3000 70 70 1000 600 70 20 62L GWQSGCL6000 28500 400 25000 5000 0 0 70000 70000 140000 84500 25000 20000 6000Contaminant of Concernn-Butylbenzene n-Propyl benzene sec-Butylbenzene Styrene tert-Butylbenzene Toluene Total Xylenes Trichloroethene Trichlorofluoromethane Vinyl chloride All Other Analytes 7069007030000708500707000070150006002600005008550033000200020000000.0330GW Standard Revised/Estab. (See Table III)8/14/2013BQL36040316317,300BQLBQLBQLBQLBQL1,1201,630BQL21574GW23BQLBQLBQLBQLBQL16,4006,590BQLBQLBQLBQL8/12/2014BQL126BQL47.66,820BQLBQLBQL21.9BQL566801BQL1.7174GW23BQL14.20.75BQLBQL7,0002,95010.7BQLBQLBQL3/10/2015BQL141BQLBQL8,620BQLBQLBQLBQLBQL565709BQLBQL74GW23BQLBQLBQLBQLBQL9,3303,240BQLBQLBQLBQL8/18/2015BQL202BQL98.810,900BQLBQLBQL15.2BQL518878BQLBQL74GW23BQL27.41.29BQLBQL10,7004,2304.37BQLBQLBQL2/11/2016BQL161BQLBQL4,590BQLBQLBQL3.35BQL491619BQL1.3374GW233.0615.2BQLBQL1.155,7803,0301.84BQLBQLBQL8/16/2016BQLBQLBQLBQL9,310BQLBQLBQLBQLBQL460478BQLBQL74GW23BQLBQLBQLBQLBQL8,9003,160BQLBQLBQLBQL2/13/2017BQL338BQLBQL11,200BQLBQLBQLBQLBQL404528BQLBQL74GW23BQLBQLBQLBQLBQL12,1007,070BQLBQLBQLBQL2/13/2017BQL348BQLBQL10,400BQLBQLBQLBQLBQL394520BQLBQL74GW23DupBQLBQLBQLBQLBQL11,3006,850BQLBQLBQLBQL8/15/2017BQLBQLBQLBQL3,700BQLBQLBQLBQLBQL220346BQLBQL74GW23BQLBQLBQLBQLBQL5,2704,850BQLBQLBQLBQL2/16/2018BQL252BQLBQL4,900BQLBQLBQLBQLBQL547895BQLBQL74GW23BQLBQLBQLBQLBQL3,6502,200BQLBQLBQLBQL2/16/2018BQL243BQL1193,640BQLBQLBQLBQLBQL442773BQLBQL74GW23DupBQLBQLBQLBQLBQL2,7301,950BQLBQLBQLBQL8/14/2018BQL48.3BQL25.4137BQLBQLBQLBQLBQL45134BQLBQL74GW23BQL3.5BQLBQLBQL113254BQLBQLBQLBQL11/13/2018BQL123BQL84.5229BQLBQLBQLBQLBQL109283BQLBQL74GW23BQL7.35BQLBQLBQL197703BQLBQLBQLBQLNotes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 5 9. Well nomenclature in RED indicates the well has been abandoned 1,1-Dichloroethane 1,2,4-Trimethylbenzene 1,2-Dichloroethane 1,3,5-Trimethylbenzene Benzene ChloroethaneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996TABLE 7.2BSM 6200BDateBromodichloromethane Sample IDChloroform cis-1,2-Dichloroethene Dichlorodifluoromethane Isopropylbenzene Ethylbenzene Naphthalene Methyl-tert butyl ether (MTBE)6 400 0.4 400 1 0.6 3000 70 70 1000 600 70 20 62L GWQSGCL6000 28500 400 25000 5000 0 0 70000 70000 140000 84500 25000 20000 6000Contaminant of Concernn-Butylbenzene n-Propyl benzene sec-Butylbenzene Styrene tert-Butylbenzene Toluene Total Xylenes Trichloroethene Trichlorofluoromethane Vinyl chloride All Other Analytes 7069007030000708500707000070150006002600005008550033000200020000000.0330GW Standard Revised/Estab. (See Table III)2/20/2014BQLBQLBQLBQLBQLBQLBQLBQL0.6BQLBQLBQLBQLBQL74GW24BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL2/20/2014BQLBQLBQLBQLBQLBQLBQLBQL0.62BQLBQLBQLBQLBQL74GW24DupBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL3/10/2015BQLBQLBQLBQLBQLBQLBQLBQL0.44BQLBQLBQLBQLBQL74GW24BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL3/10/2015BQLBQLBQLBQLBQLBQLBQLBQL0.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.63BQLBQLBQL0.84BQLBQLBQLBQLBQL74GW29BQLBQLBQLBQLBQLBQLBQL6.45BQLBQLBQL8/12/2014BQLBQLBQLBQL1.53BQLBQLBQL0.99BQLBQLBQLBQLBQL74GW29BQLBQLBQLBQLBQLBQLBQL4.92BQLBQLBQL8/18/2015BQLBQLBQLBQL1.38BQLBQLBQLBQLBQLBQLBQLBQLBQL74GW29BQLBQLBQLBQLBQLBQLBQL4.61BQLBQLBQL8/16/2016BQLBQLBQLBQL1.28BQLBQLBQLBQLBQLBQLBQLBQLBQL74GW29BQLBQLBQLBQLBQLBQLBQL4.79BQLBQLBQL8/15/2017BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW29BQLBQLBQLBQLBQLBQLBQL4.75BQLBQLBQL8/14/2018BQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQLBQL74GW29BQLBQLBQLBQLBQLBQLBQL4BQLBQLBQLNotes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 6 9. Well nomenclature in RED indicates the well has been abandoned C72GW33 72GW34 72GW52A 72GW62 74GW10 74GW15 74GW17 74GW23 74GW24 74GW24Dup 74GW29 GROUNDWATER LABORATORY ANALYTICAL RESULTSSITE 3996TABLE 7.3A8/14/2018Date Sampled:2L GWQSUNITSPARAMETER74GW16 GCLEquip_ Rinsate EPA METHOD 610 BY EPA METHOD 6252-Methylnaphthalene 12,500.000030.00000.00 0.00 0.00 0.00 0.00 0.0036.30.000.000.00 0.00 0.00ug/L0.00Acenaphthene 2,120.000080.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Acenaphthylene 1,965.0000200.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Anthracene 2,000.00002,000.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Benzo(a)anthracene 4.70000.05000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Benzo(a)pyrene 0.81000.00500.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Benzo(b)fluoranthene 0.75000.05000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Benzo(g,h,i)perylene 200.0000200.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Benzo(k)fluoranthene 0.50000.50000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Chrysene 5.00005.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Dibenzo(a,h)anthracene 1.20000.00500.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Fluoranthene 300.0000300.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Fluorene 990.0000300.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Indeno(1,2,3-c,d)pyrene 0.05000.05000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Naphthalene 6,000.00006.00000.00 0.00 0.00 0.00 0.00 0.0086.10.000.000.00 0.00 0.00ug/L0.00Phenanthrene 410.0000200.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Pyrene 200.0000200.00000.00 0.00 0.00 0.00 0.00 0.000.000.000.000.00 0.00 0.00ug/L0.00Totals:0.00 0.00 0.000.000.00 0.00 122.40.000.000.00 0.00 0.00 0.00Page 1Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. ug/L = Micrograms per Liter 4. A zero ("0.00") in the results column indicates concentration is either below detection limit or below quantitation limit 5. A zero ("0.0000") in the 2L GWQS column indicates the 2L standard is equal to the laboratory detection limit 6. A zero ("0.0000") in the GCL column indicates a GCL has not been established C74GW23 GROUNDWATER LABORATORY ANALYTICAL RESULTSSITE 3996TABLE 7.3A (Continued)11/13/2018Date Sampled:EPA METHOD 610 BY EPA METHOD 6252L GWQSUNITSPARAMETERGCL2-Methylnaphthalene 12,500.000030.00000.00ug/LAcenaphthene 2,120.000080.00000.00ug/LAcenaphthylene 1,965.0000200.00000.00ug/LAnthracene 2,000.00002,000.00000.00ug/LBenzo(a)anthracene 4.70000.05000.00ug/LBenzo(a)pyrene 0.81000.00500.00ug/LBenzo(b)fluoranthene 0.75000.05000.00ug/LBenzo(g,h,i)perylene 200.0000200.00000.00ug/LBenzo(k)fluoranthene 0.50000.50000.00ug/LChrysene 5.00005.00000.00ug/LDibenzo(a,h)anthracene 1.20000.00500.00ug/LFluoranthene 300.0000300.00000.00ug/LFluorene 990.0000300.00000.00ug/LIndeno(1,2,3-c,d)pyrene 0.05000.05000.00ug/LNaphthalene 6,000.00006.00000.00ug/LPhenanthrene 410.0000200.00000.00ug/LPyrene 200.0000200.00000.00ug/LTotals:0.00Page 2Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. ug/L = Micrograms per Liter 4. A zero ("0.00") in the results column indicates concentration is either below detection limit or below quantitation limit 5. A zero ("0.0000") in the 2L GWQS column indicates the 2L standard is equal to the laboratory detection limit 6. A zero ("0.0000") in the GCL column indicates a GCL has not been established GW Standard Revised/Estab. (See Table III)2-MethylnaphthaleneAcenaphtheneAnthraceneBenzo(a)anthraceneBenzo(a)pyreneBenzo(g,h,i)peryleneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996 TABLE 7.3B EPA METHOD 610 BY EPA METHOD 625 Date Benzo(b)fluorantheneSample ID Benzo(k)fluorantheneChryseneFluorantheneIndeno(1,2,3-c,d)pyreneFluorenePhenanthreneNaphthalene30 80 2000 0.05 0.005 0.05 200 0.5 5 300 300 0.05 6 2002L GWQS GCL 12500 2120 2000 4.7 0.81 0.75 200 0.5 5 300 990 0.05 6000 410 Contaminant of Concern PyreneAll Other Analytes200 200 8/14/2013 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW33 BQL BQL 8/12/2014 BQL 0.38 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW33 BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW33 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW33 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW33 BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW33 BQL BQL 8/14/2013 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW34 BQL BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW34 BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW34 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW34 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW34 BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW34 BQL BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW35 BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW35 BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW35Dup BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW35 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW35Dup BQL BQL 8/14/2013 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 0.962 BQL72GW52A BQL BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 0.462 BQL72GW52A BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW52A BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW52A BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW52A BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW52A BQL BQL 2/20/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW53A BQL BQL 3/10/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW53A BQL BQL Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 1 9. Well nomenclature in RED indicates the well has been abandoned GW Standard Revised/Estab. (See Table III)2-MethylnaphthaleneAcenaphtheneAnthraceneBenzo(a)anthraceneBenzo(a)pyreneBenzo(g,h,i)peryleneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996 TABLE 7.3B EPA METHOD 610 BY EPA METHOD 625 Date Benzo(b)fluorantheneSample ID Benzo(k)fluorantheneChryseneFluorantheneIndeno(1,2,3-c,d)pyreneFluorenePhenanthreneNaphthalene30 80 2000 0.05 0.005 0.05 200 0.5 5 300 300 0.05 6 2002L GWQS GCL 12500 2120 2000 4.7 0.81 0.75 200 0.5 5 300 990 0.05 6000 410 Contaminant of Concern PyreneAll Other Analytes200 200 8/14/2013 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW62 BQL BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW62 BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW62 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW62 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW62 BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW62 BQL BQL 2/20/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW63 BQL BQL 3/10/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL72GW63 BQL BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW01 BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW01 BQL BQL 8/14/2013 BQL 1.62 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW10 BQL BQL 8/14/2013 BQL 1.47 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW10Dup BQL BQL 8/12/2014 BQL 0.613 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW10 BQL BQL 8/12/2014 BQL 0.623 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW10Dup BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW10 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW10 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW10 BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW10 BQL BQL 8/14/2013 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW14 BQL BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW14 BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW14 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW14 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW14 BQL BQL Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 2 9. Well nomenclature in RED indicates the well has been abandoned GW Standard Revised/Estab. (See Table III)2-MethylnaphthaleneAcenaphtheneAnthraceneBenzo(a)anthraceneBenzo(a)pyreneBenzo(g,h,i)peryleneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996 TABLE 7.3B EPA METHOD 610 BY EPA METHOD 625 Date Benzo(b)fluorantheneSample ID Benzo(k)fluorantheneChryseneFluorantheneIndeno(1,2,3-c,d)pyreneFluorenePhenanthreneNaphthalene30 80 2000 0.05 0.005 0.05 200 0.5 5 300 300 0.05 6 2002L GWQS GCL 12500 2120 2000 4.7 0.81 0.75 200 0.5 5 300 990 0.05 6000 410 Contaminant of Concern PyreneAll Other Analytes200 200 8/14/2013 1.19 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 5.39 BQL74GW15 BQL BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW15 BQL BQL 8/18/2015 1.4 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 4.11 BQL74GW15 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW15 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW15 BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW15 BQL BQL 8/14/2013 166 BQL BQL 3.02 BQL BQL BQL BQL BQL 5.47 2.92 BQL 341 5.4774GW16 4.72 BQL 8/12/2014 103 1.64 0.726 0.679 0.434 0.642 BQL BQL 0.5 1.68 1.42 BQL 245 1.9874GW16 1.19 BQL 3/10/2015 85 1.35 0.377 0.566 BQL 0.519 BQL BQL 0.377 1.42 1.26 BQL 195 1.7374GW16 1.03 BQL 8/18/2015 91.5 1.46 BQL BQL BQL BQL BQL BQL BQL 1.74 1.43 BQL 247 1.9374GW16 1.12 BQL 8/16/2016 160 1.63 BQL 1.17 BQL 1.21 BQL BQL 1.04 2.49 1.66 BQL 335 2.5974GW16 2.5 BQL 8/15/2017 35.6 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 32.1 1.1774GW16 BQL BQL 8/14/2018 36.3 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 86.1 BQL74GW16 BQL BQL 8/14/2013 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW17 BQL BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW17 BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW17 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW17 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW17 BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW17 BQL BQL 8/14/2013 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW21 BQL BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW21 BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW21 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW21 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW21 BQL BQL Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 3 9. Well nomenclature in RED indicates the well has been abandoned GW Standard Revised/Estab. (See Table III)2-MethylnaphthaleneAcenaphtheneAnthraceneBenzo(a)anthraceneBenzo(a)pyreneBenzo(g,h,i)peryleneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996 TABLE 7.3B EPA METHOD 610 BY EPA METHOD 625 Date Benzo(b)fluorantheneSample ID Benzo(k)fluorantheneChryseneFluorantheneIndeno(1,2,3-c,d)pyreneFluorenePhenanthreneNaphthalene30 80 2000 0.05 0.005 0.05 200 0.5 5 300 300 0.05 6 2002L GWQS GCL 12500 2120 2000 4.7 0.81 0.75 200 0.5 5 300 990 0.05 6000 410 Contaminant of Concern PyreneAll Other Analytes200 200 8/14/2013 0.419 BQL BQL 0.962 1.09 2.44 0.971 0.886 2.3 1.29 BQL 1.04 3.01 BQL74GW23 1.23 BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 1.31 BQL74GW23 BQL BQL 3/10/2015 BQL BQL BQL 0.434 BQL 0.698 BQL BQL 0.462 0.623 BQL BQL 1.35 BQL74GW23 0.566 BQL 8/18/2015 BQL BQL BQL BQL BQL 1.25 BQL BQL BQL BQL BQL BQL 2.25 BQL74GW23 BQL BQL 2/11/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 1.1 BQL74GW23 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 1.9 BQL74GW23 BQL BQL 2/13/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 1.94 BQL74GW23 BQL BQL 2/13/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 1.85 BQL74GW23Dup BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 3.1 BQL74GW23 BQL BQL 2/16/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 2.04 BQL74GW23 BQL BQL 2/16/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 1.67 BQL74GW23Dup BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW23 BQL BQL 11/13/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW23 BQL BQL 2/20/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24 BQL BQL 2/20/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24Dup BQL BQL 3/10/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24 BQL BQL 3/10/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24Dup BQL BQL 2/11/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24 BQL BQL 2/11/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24Dup BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24Dup BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24 BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW24Dup BQL BQL Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 4 9. Well nomenclature in RED indicates the well has been abandoned GW Standard Revised/Estab. (See Table III)2-MethylnaphthaleneAcenaphtheneAnthraceneBenzo(a)anthraceneBenzo(a)pyreneBenzo(g,h,i)peryleneHISTORICAL GROUNDWATER LABORATORY ANALYTICAL RESULTS SITE 3996 TABLE 7.3B EPA METHOD 610 BY EPA METHOD 625 Date Benzo(b)fluorantheneSample ID Benzo(k)fluorantheneChryseneFluorantheneIndeno(1,2,3-c,d)pyreneFluorenePhenanthreneNaphthalene30 80 2000 0.05 0.005 0.05 200 0.5 5 300 300 0.05 6 2002L GWQS GCL 12500 2120 2000 4.7 0.81 0.75 200 0.5 5 300 990 0.05 6000 410 Contaminant of Concern PyreneAll Other Analytes200 200 8/14/2013 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW29 BQL BQL 8/12/2014 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW29 BQL BQL 8/18/2015 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW29 BQL BQL 8/16/2016 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW29 BQL BQL 8/15/2017 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW29 BQL BQL 8/14/2018 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL74GW29 BQL BQL Notes: 1. 2L GWQS = North Carolina Groundwater Quality Standard 15A NCAC 2L .0202 2. GCL = Gross Contamination Levels for groundwater as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, Change 3 Effective December 1, 2013 3. All units are in ug/L (Micrograms per Liter) 4. BQL = Below Quantitation Limits 5. NA = Not Analyzed 6. A zero in the 2L GWQS column indicates the 2L Standard is equal to the laboratory detection limit 7. A zero in the GCL column indicates a GCL has not been established 8. Shaded concentrations indicate exceedance of the 2L GWQS Page 5 9. Well nomenclature in RED indicates the well has been abandoned TABLE 7.4SITE 130/3996EFFLUENT AIR LABORATORY ANALYTICAL RESULTSSite_ID Sample_ID Lab_ID Matrix Date_Samp Samp_Time LAB Method CAS Parameter Result DET_Limit Units Data_Qualifier CONC_FACTOR130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)135-98-8 sec-Butylbenzene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)96-12-8 1,2-Dibromo-3-Chloropropane ND 50 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)630-20-6 1,1,1,2-Tetrachloroethane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)71-55-6 1,1,1-Trichloroethane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)79-34-5 1,1,2,2-Tetrachloroethane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)79-00-5 1,1,2-Trichloroethane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)75-34-3 1,1-Dichloroethane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)96-18-4 1,2,3-Trichloropropane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)120-82-1 1,2,4-Trichlorobenzene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)106-93-4 1,2-Dibromoethane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)95-50-1 1,2-Dichlorobenzene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)107-06-2 1,2-Dichloroethane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)78-87-5 1,2-Dichloropropane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)541-73-1 1,3-Dichlorobenzene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)106-46-7 1,4-Dichlorobenzene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)78-93-3 2-Butanone ND 50 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)591-78-6 2-Hexanone ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)108-10-1 4-Methyl-2-Pentanone ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)71-43-2 Benzene ND 50 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)75-27-4 Bromodichloromethane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)75-25-2 Bromoform ND 50 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)56-23-5 Carbon Tetrachloride ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)108-90-7 Chlorobenzene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)67-66-3 Chloroform ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)124-48-1 Dibromochloromethane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)74-95-3 Dibromomethane ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)100-41-4 Ethylbenzene 96 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)87-68-3 Hexachloro-1,3-Butadiene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)91-20-3 Naphthalene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)100-42-5 Styrene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)127-18-4 Tetrachloroethene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)108-88-3 Toluene 310 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)79-01-6 Trichloroethene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)156-59-2 c-1,2-Dichloroethene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)10061-01-5 c-1,3-Dichloropropene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)95-47-6 o-Xylene 420 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)179601-23-1 p/m-Xylene 1000 50 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)156-60-5 t-1,2-Dichloroethene ND 50 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)10061-02-6 t-1,3-Dichloropropene ND 20 ug/m3 1.00130/3996130/3996 Effluent Air18-11-0991Air11/12/18 9:45 AMCalscience EPA TO‐17 (M)99-87-6 p-Isopropyltoluene ND 20 ug/m3 1.00ND = Non DetectPage  1 <<^_ ^_ ^_ ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! !! !! ! !! ! ! !! ! ! ! ! ! ! !! ! ! ! !! !! !! ! ! ! !! ! ! ! ! ! ! ! ! ! ! !! !! !! ! ! !! ! > > > >R > > R> > > > R> > > > > > > > > > > >R >R >R > >R >R > R RR > J > > >R > > > > > > R > R R >R >R >R> R > = J J J J J > >> > > 72GW01 72GW15 72GW10 72GW06 72GW24 74GW33 72GW02 72GW25 74PR25 72GW67 74HP01 72GW16 72GW26 72GW27 72GW13 72GW34 74GW1574GW14 74GW23 74GW24 131 72GW62 72GW63 72GW28 72GW04 72GW12 72GW29 72GW3272GW31 74GW19 74GW20 74GW0674GW07 74GW09 74GW0474GW05 74GW0874GW25 72GW35 74GW0174GW02 74GW16 74GW1074GW11 74GW12 74GW17 74GW13 74GW29 74GW2274GW21 74GW2774GW03 72GW53A72GW52ASITE 130SITE 399672GW11 72GW30 74GW44 74GW36 74GW41 145 1790 199 1640 1639 3998 1667 1669 4030 3996 3997 140 167017006TH AVENUEWRIGHT ROAD A STREET72GW33 74GW26 74GW18 74GW28 144 130 72GW22 72GW03 =90GW01 72GW23 72GW05 72GW14 72GW08 72GW07 72GW17 Scale:AS SHOWN MCAS CHERRY POINTPERIODIC MONITORINGREPORT NOTES Job No.:218001 Date Drawn:DEC 2018 Drawn By:THW Checked By:SAC FIGURE 7.1 LEGEND No Measurable Thickness Product Detected Free Product Plume Free ProductWell by Type ! ! Known Points of Release^_ ³ SITE 3996FREE PRODUCT PLUME MAP AS OF AUGUST 2018 J RW A Surface Water =T-I >T-II R T-III S Unknown Well! This document is "FOR OFFICIAL USE ONLY" and it contains info that may be exempt from public release under theFOI Act (5 U.S.C. 552). It is to be handled IAW DoD policy and is not to be released to the public or personnel who do not have a valid "need-to-know" without prior approval of an authorized DoD official. WARNING: 1. Free Product was not detected at this site in any of the wells gauged during this monitoring event. 200 0 200100 FeetSCALE àGroundwater Flow Direction (Upper Aquifer) <<^_ ^_ ^_ ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !! !! ! ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !! !!!! !! ! > >R > > R> > > > R> > > > > > > > > > > >R >R >R > >R >R > R RR > J > > > > > > > R > R >R >R > R> R >R >> > = J J J J J > >> > > 147 144 72GW01 72GW15 72GW24 74GW33 72GW0272GW25 72GW66 72GW6774HP01 72GW16 72GW26 72GW27 72GW13 131 72GW63 72GW28 72GW04 72GW12 72GW29 72GW53ASITE 130SITE 399672GW11 72GW30 74GW44 74GW36 74GW41 145 1790 199 1640 1639 3998 1667 1669 4030 1665 3996 3997 140 167017006TH AVENUEWRIGHT ROAD A STREET74GW18 74GW13 74GW06 74GW07 74GW09 74GW03 74GW04 74GW25 74GW05 74GW11 74GW12 74GW28 74GW27 74GW26 74GW22 74GW01 74GW02 74GW19 74GW20 74GW08 72GW32 72GW3172GW17 74PR29 74PR2772GW65 74PR25 74PR2672GW49A72GW48A 72GW0572GW22 3769 146 130 72GW35 72GW03 74GW23 74GW24 72GW52A 74GW16 74GW15 72GW34 74GW29 72GW62 74GW10 74GW17 74GW33 !> 72GW68 74GW14 74GW21 Scale:AS SHOWN MCAS CHERRY POINTPERIODIC MONITORINGREPORT NOTES Job No.:218001 Date Drawn:DEC 2018 Drawn By:THW Checked By:SAC FIGURE 7.2 LEGEND Well by Type Known Points of Release^_ ³ J RW A Surface Water =T-I >T-II R T-III S Unknown Well! This document is "FOR OFFICIAL USE ONLY" and it contains info that may be exempt from public release under theFOI Act (5 U.S.C. 552). It is to be handled IAW DoD policy and is not to be released to the public or personnel who do not have a valid "need-to-know" without prior approval of an authorized DoD official. WARNING: SITE 3996SM 6200B COLORIMETRY AND PLUME IN EXCESS OF 2L - UST COMPOUNDS -AS OF AUGUST 2018 SM 6200B2L CompliantSM 6200B 2L Non-Compliant(UST Compounds) SM 6200BPlume in Excess of 2L ! ! Free Product Detected! SM 6200B 2L Non-Compliant(Non-UST Compounds)! 1. The sampling frequency for this site is Annual and the next sampling event is scheduled for August 2019. 2. 2L Standard refers to North Carolina Groundwater Quality Standard 15A NCAC 2L.0202. 3. GCL refers to Gross Contaminant Level as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, change 3 Effective December 1, 2013. 4. A 2L Standard of "0.00" implies a standard has not yet been established. According to NCAC T15:02L, any compound found above laboratory detection limits is considered non-compliant unless otherwise specified by the NCDEQ. 5. The groundwater contaminant boundary depicted on this Figure is based on the GCL list negotiated between the NCDEQ and the MCASCP EAD (letter dated January 15, 2008). Groundwater wells depicted as "blue" and data shaded with "blue" in the table exceed the NC 2L Standard for Non-UST compounds only. 200 0 200100 FeetSCALE àGroundwater Flow Direction (Upper Aquifer) Groundwater wells depicted as "blue" exceed the NC 2L standard for non-UST compounds. Sample ID Well Type Well Depth Date Parameter Results Units 2L Standard GCL 72GW52A T-II 25.00 8/14/2018 Benzene 13.10000 ug/L 1.00000 5000.0000072GW52AT-II 25.00 8/14/2018 Trichloroethene 3.71000 ug/L 3.00000 3000.0000074GW16T-II 13.90 8/14/2018 1,1-Dichloroethane 88.10000 ug/L 6.00000 6000.0000074GW16T-II 13.90 8/14/2018 Benzene 3.32000 ug/L 1.00000 5000.0000074GW16T-II 13.90 8/14/2018 Naphthalene 92.50000 ug/L 6.00000 6000.0000074GW16T-II 13.90 8/14/2018 Vinyl chloride 2.36000 ug/L 0.03000 30.0000074GW23T-II 14.30 8/14/2018 Benzene 137.00000 ug/L 1.00000 5000.0000074GW23T-II 14.30 8/14/2018 Isopropylbenzene 134.00000 ug/L 70.00000 25000.0000074GW29T-II 25.00 8/14/2018 Trichloroethene 4.00000 ug/L 3.00000 3000.00000 74GW23 T-II 14.30 11/13/2018 Benzene 229.00000 ug/L 1.00000 5000.0000074GW23T-II 14.30 11/13/2018 Isopropylbenzene 283.00000 ug/L 70.00000 25000.0000074GW23T-II 14.30 11/13/2018 Total Xylenes 703.00000 ug/L 500.00000 85500.00000 August 2018 November 2018 <<^_ ^_ ^_ ! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!! ! !!!!!! ! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! !! > >R > > R> > > > R> > > > > > > > > > > >R >R >R > >R >R > R RR > J > > >R > > > > > > R > R R >R >R >R> R >> > = J J J J J > >> > > 144 72GW01 72GW15 72GW10 72GW24 74GW33 72GW0272GW25 72GW66 72GW67 74HP01 72GW16 72GW26 72GW27 72GW13 74GW23 131 72GW63 72GW28 72GW04 72GW12 72GW29 72GW31 72GW53ASITE 130SITE 399672GW11 72GW30 74GW44 74GW36 74GW41 145 1790 199 1640 1639 39981667 1669 4030 3996 3997 140 167017006TH AVENUEWR I G H T R O A D A STREET74GW18 74GW13 74GW06 74GW07 74GW09 74GW03 74GW04 74GW25 74GW05 74GW11 74GW12 74GW28 74GW27 74GW26 74GW22 74GW02 74GW19 74GW20 74GW08 130 4553 74PR29 74PR26 74PR27 74PR2572GW05 72GW22 72GW06 72GW07 72GW08 72GW32 72GW23 72GW03 72GW35 74GW01 74GW52A 74GW21 74GW14 72GW68 72GW34 72GW33 72GW62 72GW52A 74GW29 74GW17 74GW10 74GW15 74GW24 74GW16 Scale:AS SHOWN MCAS CHERRY POINTPERIODIC MONITORINGREPORT NOTES Job No.:218001 Date Drawn:DEC 2018 Drawn By:THW Checked By:SAC FIGURE 7.3 LEGENDWell by Type Known Points of Release^_ ³ This document is "FOR OFFICIAL USE ONLY" and it contains info that may be exempt from public release under theFOI Act (5 U.S.C. 552). It is to be handled IAW DoD policy and is not to be released to the public or personnel who do not have a valid "need-to-know" without prior approval of an authorized DoD official. WARNING: SITE 3996EPA METHOD 610 EPA BY METHOD 625COLORIMETRY AND PLUME IN EXCESS OF 2L AS OF AUGUST 2018 EPA 610 by EPA 6252L CompliantEPA 610 by EPA 6252L Non-Compliant EPA 610 by EPA 625Plume in Excess of 2L ! ! Free Product Detected! 1. The sampling frequency for this site is Annual and the next sampling event is scheduled for August 2019. 2. 2L Standard refers to North Carolina Groundwater Quality Standard 15A NCAC 2L.0202. 3. GCL refers to Gross Contaminant Level as defined in "Guidelines for Assessment and Corrective Action for UST Releases" July 15, 2008 Version, change 3 Effective December 1, 2013. 4. A 2L Standard of "0.00" implies a standard has not yet been established. According to NCAC T15:02L, any compound found above laboratory detection limits is considered non-compliant unless otherwise specified by the NCDEQ.àGroundwater Flow Direction (Upper Aquifer) SCALE 200 0 200100 Feet J RW A Surface Water =T-I >T-II R T-III S Unknown Well! Sample ID Well Type Well Depth Date Parameter Results Units 2L Standard GCL74GW16T-II 13.90 8/14/2018 2-Methylnaphthalene 36.30000 ug/L 30.00000 12500.0000074GW16T-II 13.90 8/14/2018 Naphthalene 86.10000 ug/L 6.00000 6000.00000