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Home My WebLink AboutMO-88110_88110_CA_O_20190814_Soil Vapor Letter to Wilson Residents (Lot 6)JACOBS August 14, 2019 Delivered via Email (wilsodg@gmail.com) Mr. and Mrs. Derek Wilson 1243 Middlecrest Drive NW Concord, North Carolina 28027 Subject: Results from Recent Soil Vapor Monitoring Plantation Pipe Line Company Poplar Tent Road Site NCDEQ Groundwater Incident No. 88110 Dear Mr. and Mrs. Wilson, 14120 Ballantyne Corporate Place, Suite 200 Charlotte, North Carolina 28277 United States T +1.704.544.4040 F +1.704.544.4041 www.jacobs.com Thank you for allowing Plantation Pipe Line Company's representatives (Jacobs) to conduct confirmation soil vapor monitoring activities on your property in July 2019. The purpose of this letter is to provide a summary of the monitoring activities conducted on your property, along with a summary of the analytical results. July 2019 Monitoring Activities On July 3, 2019, Jacobs sent you an email requesting access to your property to collect samples from soil vapor monitoring point SV-5R (see attached figure). On July 10, 2019, a leak check was conducted on soil vapor monitoring point SV-5R prior to collecting a vapor sample. The soil vapor monitoring point passed the leak check and was purged with an electric sampling pump prior to sample collection. Soil vapor samples were then collected using sampling syringes with charcoal tubes. The samples were submitted to Eurofins TestAmerica in Knoxville, Tennessee for analysis of naphthalene and 2- m ethyl naphthalene. Analytical Results The analytical data from the July 10, 2019 monitoring event are attached to this letter and are summarized in Table 1. When reviewing the laboratory analytical report, please note the sample identification for your soil vapor monitoring point is SV-5R-071019. A duplicate sample was collected from soil vapor monitoring point SV-5R as part of a standard practice to measure field and laboratory precision, as well as to provide an indication of the comparability of the results. The duplicate sample identification is SV-5RD-071019. Data from historical monitoring events are shown in Table 2. The results show that naphthalene and 2-methyl naphthalene were not detected at or above their respective laboratory reporting or method detection limits in the samples collected from SV-5R. Jacobs Engineering Group Inc. Mr. and Mrs. Derek Wilson August 14, 2019 JACOBS Page 2 of 2 Factors Influencing the Analytical Results In general, soil vapor monitoring results are expected to vary over time due to several factors, including seasonal temperature changes, changes in barometric pressure, changes in water table elevations, changes in subsurface conditions due to precipitation prior to a monitoring event, changes in subsurface conditions due to operating the remediation system, and variations in the contaminant source concentrations. An evaluation of precipitation data, vacuum monitoring data, and analytical data to date generally shows that during and following precipitation events positive pressure and elevated concentrations are observed in SV-5R; during drier periods, vacuum influence and relatively lower chemical concentrations are observed. This trend suggests that the soil vapor extraction (SVE) system was positively influencing SV- 5R and the surrounding area during periods of drier weather; however, during periods of increased precipitation, positive pressure is noted, along with elevated concentrations. Soil Vapor Monitoring Plan As discussed in the Meeting Summary and Rebound Monitoring Plan letter that Jacobs submitted to NCDEQ on May 30, 2019, the biosparging and SVE systems were turned off at the end of April 2019 for rebound monitoring through April 2020. The next semiannual monitoring event is currently planned for October 2019. A Jacobs representative will contact you separately to coordinate this monitoring event. Thank you for your assistance and we apologize for any inconvenience this sampling program may cause. Please feel free to contact me at 704.543.3285 or Jerry Aycock with Plantation at 770.751.4165 if you have any questions about the monitoring results. The NCDEQ is an additional resource to discuss aspects of the site and our monitoring activities. Ms. Trudy Beverly is the NCDEQ case manager and can be contacted at 704.663.1699 concerning this site (NCDEQ Incident #88110). Again, thank you for your cooperation. Sincerely, Mike Skeean, P.E. Project Manager Copies to: Jerry Aycock, Plantation (via email) Trudy Beverly, North Carolina Department of Environmental Quality (via email and USPS) Brian Pace, Laureldale LLC (via email) File —Jacobs Attachments: Table 1 — Soil Vapor Analytical Results (July 2019) Table 2 — Historical Soil Vapor Analytical Results (October 2007 through July 2019) Figure 1 — Biosparging/SVE System As -Built Analytical Laboratory Report Tables Table 1 Soil Vapor Analytical Results (July 2019) Poplar Tent Road Plantation Pipe Line Company Concord, Cabarrus County, North Carolina C L19 = v N LCl C c h c %+ ti Date Collected G> c 0 y 0 r 0 r X O G1 r �' O M O t M r °' O Sample ID (MM/DD/YYYY) m � >+ t a X .. C Q. a W E f0 Z N M C p /m3 SV-5R-071019 04/24/2019 NA NA NA NA NA ND <1.7 ND <2.6 SV-5RD-0710191 04/24/2019 NA NA NA NA NA ND <1.7 ND <2.6 Soil Gas Screening 120 34,800 374 695 695 20.9 NS LCriteria Soil Gas Screening Criteria3 120 1 34,800 374 1 695 695 21 NS _j Notes: 'Duplicate sample collected from SV-5R. 2February 2018 North Carolina Department of Environmental Quality Division of Waste Management Residential Vapor Intrusion Screening Levels for Sub -Slab and Exterior Soil Gas (SGSL) based on an attenuation factor of 0.03. https://files.nc.gov/ncdeq/Waste%20Management/DWM/SF/RiskBasedRemediation/Feb2018_Res_VISLs.pdf 3USEPA Vapor Intrusion Screening Levels (VISL) Calculator (AF = 0.03), TRL = 10-5 or THQ = 0.2, accessed June 19, 2019. https://epa-visl.ornl.gov/cgi-bin/visl_search 4The method detection limit is presented for samples analyzed by TO-17 in July 2019. < - Indicates value is less than the shown reporting limit pg/m3 - micrograms per cubic meter J - estimated value NA - not analyzed ND - not detected NS - no soil gas screening criteria available AF - Attenuation Factor TRL - Target Risk Level THQ - Target Hazard Quotient USEPA - United States Environmental Protection Agency Bold text with gray highlighting indicates exceedance of one or more screening criteria Table 2 Historical Soil Vapor Analytical Results (October 2007 through July 2019) Poplar Tent Road Site Plantation Pipe Line Company Concord, Cabarrus County, North Carolina Sample ID Collected 0CU0I A'1rl 6 y , ~ 2 6 o f a c NI 6 y t, y� v � 6 a -5 6 � c a o �. a Z v O ! m Z �'C N cwa -(MM/DD/YYYY) C ca iZ o C C M L n1 ... N Ov 6Date ' X µg/ms SV-05-100307 10/3/2007 ND < 2.4 0.6 1 ND < 2.4 0.6 J ND < 2.4 ND < 2.4 NA 0.49 J NA 3.0 1 SV-5 11/27/2007 ND < 1.9 11 2.9 8.5 3.0 ND < 1.9 NA ND < 1.9 NA 11.5 SV-5R-111612 11/16/2012 ND<2.36 7.86 1 ND<3.20 ND<6.40 ND<3.20 ND<3.87 4.8 ND<4.29 ND<2.1 ND<3.20 SV-5R-D-1116121 11/16/2012 ND < 2.45 6.67 1 ND < 3.33 18.3 J 4.33 J1 ND < 4.03 7.3 1 6.33 J ND < 2.2 22.6 1 SV-5R-0304132 03/04/2013 ND < 0.23 0.14 1, B ND < 0.30 ND < 0.30 0.016 1 ND < 0.30 ND < 2.50 ND < 1.50 ND < 2.50 NA SV-5RD-0304131" 03/04/2013 ND < 0.22 0.25 1, B 0.021 1 0.054 J 0.024 1 ND < 0.29 ND < 2.50 ND < 1.40 ND < 2.50 NA SV-5R-0304133 03/04/2013 ND < 1.66 1.20 1 ND < 2.26 0.663 1 ND < 2.26 ND < 2.73 ND < 2.40 ND < 6.03 ND < 2.40 ND < 6.80 SV-5RD-0304131" 03/04/2013 ND<1.76 0.556 1 ND<2.39 ND<4.77 ND<2.39 ND<2.89 ND<2.40 ND<6.39 1.0 1 ND<7.20 SV-5R-080S13 8/5/2013 0.071 1 0.30 0.029 1 0.11 J 0.085 1 0.085 J ND < 2.5 ND < 0.77 ND < 2.5 NA SV-5RD-080513' 8/5/2013 0.071 1 0.26 0.020 1 0.049 J 0.03 1 0.039 1 ND < 2.5 ND < 0.82 ND < 2.5 NA SV-5R-022714 02/27/2014 0.091 1 0.28 0.048 1 0.19 0.087 1 0.056 J ND < 2.5 0.18 X ND < 2.5 NA SV-5RD-022714' 02/27/2014 0.13 0.27 0.052 1 0.18 0.082 1 0.049 1 ND < 2.5 ND < 0.16 X ND < 2.5 NA SV-5R-092314 09/23/2014 0.039 1 0.11 1 ND < 0.15 0.035 J 0.015 1 NA ND < 2.5 NA ND < 2.5 NA SV-5RD-092314' 09/23/2014 0.14 1 0.054 1 ND < 0.14 0.026 J ND < 0.14 J NA ND < 2.5 NA ND < 2.5 NA SV-5R-042815 04/28/2015 ND<0.16 ND<0.81 ND<0.81 ND<0.81 ND<0.81 NA ND<2.5 R NA ND<2.5 R NA SV-5RD-042815' 04/28/2015 0.25 0.27 1 ND<0.78 ND<0.78 ND<0.78 NA ND<2.5 R NA ND<2.5 R NA SV-5R-101315 10/13/2015 62 J ND <360 150 1 440 160 1 NA ND <2.5 NA ND <2.5 NA SV-5RD-101315' 10/13/2015 ND <68 ND <340 150 J 430 180 J NA ND <2.5 NA ND <2.5 NA SV5R-121015 12/10/2015 91 ND <86 480 2,400 2,100 NA NA NA NA NA SV5RD-1210151 12/10/2015 120 ND <87 600 2,900 2,600 NA NA NA NA NA SV-5R-022916 02/29/2016 5.1 J ND <3.5 57 J 340 J 510 J NA 3.1 NA 3.0 NA SV-5RD-022916' 02/29/2016 12 J 4.2 1 140 J 820 1 1,200 1 NA 2.0 J NA 2.1 1 NA SV-5R-041116 04/11/2016 21 ND<42 320 1,700 1,600 NA 2.2 J NA ND<2.5 NA SV-5RD-041116' 04/11/2016 21 ND < 38 310 1,700 1,600 NA 2.3 J NA ND < 2.5 NA SV-5R-062716 06/27/2016 1.2 1.2 17 110 260 D NA 1.1 J NA ND < 2.5 NA SV-5RD-062716' 06/27/2016 0.90 0.57 1 16 110 250 D NA 1.5 1 NA 0.77 1 NA SV-5R-090716 09/07/2016 0.17 J 1.3 ND <0.89 ND <0.89 ND <0.89 NA ND <2.5 NA 0.64 J NA SV-5RD-090716' 09/07/2016 ND <0.20 0.54 1 ND <1.0 ND <1.0 ND <1.0 NA ND <2.5 NA 0.45 J NA SV-5R-101816 10/18/2016 ND <0.15 0.30 1 ND <0.76 ND <0.76 ND <0.76 NA ND <2.5 NA ND <2.5 NA SV-5RD-101816' 10/18/2016 ND <0.15 ND <0.74 ND <0.74 ND <0.74 ND <0.74 NA ND <2.5 NA ND <2.S NA SV-5R-041817 04/18/2017 ND <7.5 ND <37 13 J 97 130 NA ND <2.5 NA 0.44 J NA SV-5RD-041817' 04/18/2017 ND <7.3 ND <36 13 J 100 140 NA ND <2.5 NA ND < 2.5 NA SV-5R-100917 10/09/2017 ND <0.73 1.4 J 1.8 J 14 27 NA 2.0 J NA 0.63 1 NA SV-5RD-100917 10/09/2017 ND <0.75 ND <3.8 1.9 1 14 27 NA 1.6 1 NA ND < 2.5 NA SV-5R-041718 04/17/2018 ND <7.3 ND <36 ND <36 ND <36 12 NA ND <2.5 NA 5.0 NA SV-5RD-041718' 04/17/2018 NA NA NA NA NA NA ND <2.5 NA 4.9 NA SV-5R-101718 10/17/2018 NA NA NA NA NA NA ND <2.5 NA 3.5 NA SV-5RD-101718' 10/17/2018 NA NA NA NA NA NA ND <2.5 NA 3.1 NA SV-5R-101918 10/19/2018 ND <7.6 S.6 J ND <39 ND <83 5.91 NA NA NA NA NA SV-5RD-101918' 10/19/2018 ND <8.0 ND <42 ND <42 ND <88 ND <42 NA NA NA NA NA SV-5R-042419 04/24/2019 ND <2.6 ND <4.5 ND <3.5 ND <3.5 ND <3.5 NA 280 J NA 34 1 NA SV-5RD-042419' 04/24/2019 ND <2.6 ND <4.5 ND <3.5 ND <3.5 ND <3.5 NA 260 J NA 32 1 NA SV-5R-071019 07/10/2019 NA NA NA NA NA NA ND <1.7 NA ND <2.6 NA SV-5RD-071019' 07/10/2019 NA NA NA NA NA NA ND <1.7 NA ND <2.6 NA SV-14-100307 10/3/2007 ND<2.3 0.3 1 ND<2.3 ND<4.7 ND<2.3 4.0 NA 1.3 J NA ND<7 SV-14 11/28/2007 ND < 1.8 1.4 1 0.53 1 1.S J 0.56 1 ND < 1.8 NA ND < 1.8 NA 2.06 1 SV-14R-111612 11/16/2012 ND<0.89 ND<1.05 1.50 1 4.15 1 ND<1.21 ND<1.47 4.6 ND<1.63 ND<1.7 5.30 J SV-14R-030413Z 03/04/2013 ND < 0.21 0.27 1, B 0.016 1 0.059 J 0.046 1 0.12 J ND < 2.50 ND < 1.40 ND < 2.50 NA SV-14R-0304133 03/04/2013 0.679 1 0.521 1 ND < 1.99 ND < 3.98 ND < 1.99 ND < 2.4 ND < 2.40 ND < 5.32 2.4 J ND < 5.96 SV-14R-080513 8/5/2013 0.054 1 0.40 0.054 1 0.23 0.18 1 0.13 J ND < 2.5 0.98 ND < 2.5 NA SV-14R-022714 2/27/2014 0.084 1 0.24 0.042 1 0.13 J 0.18 1 0.035 J ND < 2.5 0.15 X ND < 2.5 NA SV-14R-092314 09/23/2014 0.024 1 0.073 1 ND < 0.14 0.034 J 0.013 1 NA ND < 2.5 NA ND < 2.5 NA SV-14R-042815 04/28/2015 ND<0.13 ND<0.66 ND<0.66 ND<0.66 ND<0.66 NA ND<2.5 R NA 0.50 J NA SV-14R-101315 10/13/2015 ND <0.14 1.7 ND <0.70 ND <0.70 ND <0.70 NA ND <2.5 NA ND <2.5 NA SV14R-121015 12/10/2015 ND <170 ND <170 ND <170 ND <330 ND <170 NA NA NA NA NA SV-14R-022916 02/29/2016 ND <0.13 0.31 1 ND <0.65 ND <0.65 ND <0.65 NA 2.3 1 NA 2.6 NA SV-14R-041116 04/11/2016 ND <0.15 0.70 1 1ND <0.73 ND <0.73 ND <0.73 NA ND <2.5 NA ND <2.5 NA SV-14R-062716 06/27/2016 0.15 J 0.31 1 ND <0.84 ND <0.84 ND <0.84 INA I ND <2.5 NA I ND <2.5 NA SV-14R-101816 10/18/2016 ND <0.16 ND <0.80 ND <0.80 2.8 1.0 NA ND <2.5 NA ND <2.5 NA Table 2 Historical Soil Vapor Analytical Results (October 2007 through July 2019) Poplar Tent Road Site Plantation Pipe Line Company Concord, Cabarrus County, North Carolina = m a w d d � C v1 Ill N n C v V1 C 9ul N c c n , c L V1 f6 , c L n c M ate+ N Date Collected w rl c 0 y rl 2 0 'i a 0 j, rl X D ei 0 iy s 0 !y ► 0 'y v L 0 'y v L 0 ... ei y 0 Sample ID a o v > r a x a~ a r 2 Q r Q r w (MM/DD/YYYY) m ~ c 6 m N m N m3. �y Z Z C C X ire/m3 SV-14R-041817 04/18/2017 ND <0.14 ND <0.69 ND <0.69 ND <0.69 ND <0.69 NA ND <2.5 NA ND <2.5 NA SV-14R-100917 10/09/2017 ND <0.15 0.33 J ND <0.77 ND <0.77 ND <0.77 NA 2.0 J NA 0.65 J NA SV-14R-041718 04/17/2018 ND <0.15 0.591 ND <0.76 ND <0.76 ND <0.76 NA NA NA NA NA SV-14RD-0417184 04/17/2018 ND <0.15 ND <0.74 ND <0.74 ND <0.74 ND <0.74 NA NA NA NA NA SV-14R-050318 05/03/2018 0.14 J 0.86 ND <0.85 1.8 J 1.0 NA ND <2.5 NA ND <2.5 NA SV-14RD-0503184 05/03/2018 0.23 3.6 0.401 1.5 J 0.551 NA ND <2.5 NA ND <2.5 NA SV-14R-101718 10/17/2018 0.19 J 0.16 J ND <2.3 ND <5.0 ND <2.4 NA ND <2.5 NA 2.31 NA SV-14R-042419 04/24/2019 ND <2.6 ND <4.5 IND <3.5 IND <3.5 ND <3.5 NA ND <9.47 1 NA ND <4.27 1 NA Soil Gas Screening Criteria 120 34800 374 695 695 20.9 20.9 NS NS 695 Soil Gas Screening Criteria 120 35000 370 700 700 21 21 NS NS 700 Notes: Duplicate sample collected from SV-5R 2 Sample analyzed at ALS Environmental 3Sample analyzed at ASL/Eurofins Air Toxics °Duplicate sample collected from SV-14R 5February 2018 North Carolina Department of Environmental Quality Division of Waste Management Residential Vapor Intrusion Screening Levels for Sub -Slab and Exterior Soil Gas (SGSL) based on an attenuation factor of 0.03. https://files.nc.gov/ncdeq/ Waste%20Management/DWM/SF/RiskBasedRemediation/Feb2018_Res_VISLs.pdf 6USEPA Vapor Intrusion Screening Levels (VISL) Calculator (AF = 0.03), TRL = 10-5 or THQ = 0.2, accessed June 19, 2019. https://epa-visl.orni.gov/cgi-bin/visl_search 'The method detection limit is presented for samples analyzed by TO-17 in July 2019. < - Indicates value is less than the shown reporting limit. pg/m3 - micrograms per cubic meter D - reported result is from a dilution J - estimated value R - data was rejected during validation X - excluded. Preferred analytical method for 2-Methylnaphthalene is TO-17. See case narrative in laboratory report. ND - not detected NS - no soil gas screening criteria available B - Analyte detected in both the sample and associated method blank NA - not analyzed AF - Attenuation Factor TRL - Target Risk Level THQ - Target Hazard Quotient USEPA - United States Environmental Protection Agency Bold text with gray highlighting indicates exceedance of one or more screening criteria _ Figure WF TREED /_ 1,000 GALLON / / // / // / / / \ IOU 4%� 7I7ANSEORMER f 4\�� STORAGE TANK /MW-12 / CONRETE PAD I II / MW-13 a BuO T BIOSPARGING AND SVE I II / II I SVE / BIOSPARGING I r s EQUIPMENT BUILDING I II a III CONVEYANCE LINES I (HDD UTILITY BORE) I II HOUSE U SVE/BIOSPARGING CONVEYANCE LINES I II I I I 430' 1 TOTAL I / \ / TRENCH I Iq III III 21.5' j MAX. DEPTH 1 36' CM11 --, Hrcc,ti I I I • ..:�.. WALNUT ., TREE O r--------- I I II �iiii -1 - ---� �,/ D - - I DRAIN C-2UNDERGROUND, �— =_ _— — 'a IOSPARGING I MW-11D I A ONVEYANCE LINE rc, 6" PLASTIC I T+�\�\ \ \ \ _ C-1 RENCHI / UNDERGROUND I DRAIN OUTLET \\ \ \ \\ PZ-14\� \ \\��ePZ \\ I GATE " • GRAVEL EXISTING DPE TRENCH _ , _ DRIVE I ` `y_ 4 HBS-1- \\\ SV-16A \\ \ \\ -15 O_ -'��-------------- - 1 --- ------------- - -------- _ — — — — — ——Si�15B- - sv-15 _ 6T • - — J� — — - --- - \ -�F - _ _ 6 — �T31— - ----_----------- ---------- " --------------- ----------- -----------�� \ W 9_P M - R 11 .or � Mw_IO LOCATION OF ° HBS2 ---- I R 1 r , / — 1976 RELEASE _ RW-9 l 11 p 17 % F-F F MW-Fl —F _F —F i� - RW-1 - — — _ ------------------- ,' MW-1T------------ P—Q---- _ - _ - R HORIZONTAL I HORIZONTAL I I - BIOSPARGING WELL BIOSPARGING WELL FORMER DPE WELLS 298 RISER 304' RISER OPERATING AS SVE \) 216' SCREEN (RW-7,RW-15,RW-16, 298' SCREEN RW-12, RW-13 AND 514' TOTAL 602' 60' TOTAL DEPTH FROM ENTRY POINT 14 60' DEPTH FROM ENTRY POINT F F F -F F F -F LOT 6 1 .:>':; .. LOT 1+ SV- / \ NNW-B 1 It sv �� HORIZONTAL SOIL VAPOR EXTRACTION WELL 20' SIDE 18RISER 120' SCREEN y 4/ \ 136' TOTAL /J •-� /4/ T-13' DEPTH >1\m w M`ppLE 103 E 0t) V PRE 6 SURVEY BY TAYLOR WISEMAN & TAYLOR DRAINAGEWAY SVE / BIOSPARGING TRENCH (TO SVE CONVEYANCE LINES ACCESS CLEAN OUTSNERTICAL. VAULT BIOSPARGING \ WELLS) 18" DEPTH p V V-10R SV- ,SVE--, 1 0 14 SVE-3 DEEP VERTICAL BIOSPARGING WELLS 71'-74' DEPTH 14W-704. \\ t k 1 \ DEEP V MIDDLECREST DRF IOSPA GENGICAL WELLS /4� 60'PUBLIC R/I VEYANCE TRENCHPIPING LEGEND SANITARY SEWER MANHOLE FIRE HYDRANT CURB INLET CONCRETE CURB LIGHT POLE CONCRETE ® WOOD WALKWAY - — — - PROPERTY LINE RIGHT OF WAY — — — SANITARY SEWER —"'— WATERLINE ------- STORM SEWER EXISTING 26" U/G GASOLINE LINE — °—°—°— °— EXISTING 10" U/G FIBER OPTIC LINE — F -- F — ° — EXISTING 14" U/G DIESEL FUEL LINE ——"°F— UNDERGROUND ELECTRIC > + OVERHEAD ELECTRIC TREE LINE (qMW-8 SHALLOW MONITORING WELL Q�MW-BD DEEP MONITORING WELL ®MW-BT TRANSITION ZONE MONITORING WELL OPZ-9 PIEZOMETER +SW--101 SURFACE WATER SAMPLING LOCATION °❑ RECOVERY WELL + - DPE ANGLED WELL QO SV-5R SOIL VAPOR MONITORING POINT SVE-2 ❑ VERTICAL SVE WELL 19 SVE ACCESS VAULT ■ SOURCE AREA SVE WELL VERTICAL BIOSPARGING WELL CONVEYANCE PIPING ASSOCIATED WITH THE BIOSPARGING SYSTEM CONVEYANCE PIPING ASSOCIATED WITH THE SVE SYSTEM ++++++++++++++++++++++++ SCREEN ED I NTERVAL -+++++++++++++++++++++#+ = = = = INSTALLATION VIA HDD o� 0 30 60 120 APPROXIMATE SCALE IN FEET Figure 1. Biosparging/SVE System As -Built Poplor Tent Road Site Plantation Pipe Line Company JACOBS® Concord, North Carolina KinderMorgan\358526PoplarTent\Reports\Groundwater Monitoring Reports\2018 Annual Report\Figures\CADD Analytical Laboratory Report JACOBS Memorandum 14120 Ballantyne Corporate Place, Suite 200 Charlotte, North Carolina 28277 United States T +1.704.544.4040 F +1.704.544.4041 Subject Data Validation Summary— Plantation Pipe Line Poplar Tent Road Site Project Name Plantation Pipe Line Poplar Tent Road Site Attention Kelly Ramsey/CLT, Jacobs Mike Skeean/CLT, Jacobs From Tiffany Davis/GNV, Jacobs Date July 30, 2019 Copies to Juan Acaron/GNV, Jacobs 1. Introduction The purpose of this memorandum is to present the results of the data validation process for the soil vapor samples collected at the Plantation Pipe Line Company (PPL) Poplar Tent Road site. The samples were collected in July 2019. Samples were submitted to Eurofins Test America Knoxville, Tennessee for the following analyses: • T017 Volatiles These data were validated for compliance with the analytical method requirements. This process included a review of these data to assess the accuracy, precision, and completeness based upon procedures described in guidance documents such as the Environmental Protection Agency (EPA) National Functional Guidelines for Organic Data Review (EPA 2017). The Quality assurance/quality control (QA/QC) summary forms and data reports were reviewed and the resulting findings are documented within each subsection that follows. During the data validation, if QA/QC parameters were not within the acceptance limits, associated sample results were appended with a primary qualifying flag that indicated a possible anomaly with these data. The qualifying flags originated during the data review and validation processes. This qualification also included the use of secondary sub -qualifier flags. The secondary qualifiers provide the reasoning behind the assignment of a qualifier to these data. The definitions of the primary qualifiers are presented below. 2. Validation Flag Definitions The following primary qualifiers were used to qualify the data: [_]: Detected. The analyte was analyzed for and detected at the concentration shown. [J]: Estimated. The analyte was present but the reported value may not be accurate or precise. [U]: Undetected. The analyte was analyzed for but not detected above the method detection limit. [UJ]: Detection limit estimated. The analyte was analyzed for but qualified as not detected; the detection limit is estimated. [R]: Rejected. The data are not useable. [X]: Excluded. Data were not used due to another value being more appropriate. JACOBS" Data Validation Summary- Plantation Pipe Line Poplar Tent Road Site I Organic Parameters 3.1 Quality Control Review The following list represents the QA/QC measures that were reviewed during the data quality evaluation procedure for organic data: • Holding Times — The holding times are evaluated to verify that samples were extracted and analyzed within holding times. • Blank samples — Method blank samples were provided for this project. Blank samples enable the reviewer to determine if an analyte may be attributed to sampling or laboratory procedures, rather than environmental contamination from site activities. • Surrogate Recoveries — Surrogate Compounds are added to each sample and the recoveries are used to monitor lab performance and possible matrix interference. • Lab Control Sample (LCS) — These samples are a "controlled matrix", laboratory reagent water, in which target compounds have been added prior to extraction/analysis. The recoveries serve as a monitor of the overall performance of each step during the analysis, including sample preparation. • Matrix Spike/Matrix Spike Duplicate (MS/MSD) Samples — Spike recovery is used to evaluate potential matrix interferences, as well as accuracy. Precision information is also determined by calculating the reproducibility between the recoveries of each spiked parameter. • Field Duplicate Samples — These samples are collected to determine precision between a native and its duplicate. This information can only be determined when target compounds are detected. 4. Volatile Organic Compound Analyses The QA/QC parameters for VOC analyses by T017 all samples were within acceptable control limits with the exceptions listed below. A brief overview of the data evaluation follows: 4.1 Holding Time All holding time requirements were met. 4.2 Field Duplicates Duplicate field samples were collected and submitted to the laboratory for analysis. There are two conditions under which the native and field duplicate are deemed outside acceptance criteria. For condition one, if a result for the native and field duplicate are less than five times the reporting limit, the two results must be within one times the reporting limit to meet acceptance criteria. In condition two, if the result is greater than five times the reporting limit, the two results must agree to within 20 percent relative percent difference to meet acceptance criteria. All field duplicate precision criteria were met. 4.3 Recoveries — Surrogates, MS/MSD, LCS/LCSD Surrogates and LCS/LCSD recoveries all met acceptance criteria. A MS/MSD set was not collected for this event. 4.4 Analytical Blanks No target analytes were detected in the blanks. Data Validation Summary— Plantation Pipe Line Poplar Tent Road Site JACOBS 5. PARCC Precision is defined as the agreement between duplicate results, and was estimated by comparing duplicate MS recoveries, and field duplicate sample results. The precision between the native and field duplicate sample results for all analyses were within acceptable criteria indicating that the sample matrix did not interfere with the overall analytical process. Accuracy is a measure of the agreement between an experimental determination and the true value of the parameter. In the case of VOC analysis, each of the samples were spiked with a surrogate compound with a known concentration before preparation. The surrogate and MS/MSD data provides a measure of the matrix effects as they may affect accuracy and precision of the analytical method. The LCS results demonstrate accuracy of the method. Spike recoveries were within the method acceptance limits, showing no evidence of matrix interferences that affect the usability of the data. Representativeness criteria are a qualitative measure of the degree to which sample data accurately and precisely represent a characteristic environmental condition. Representativeness is a subjective parameter and is used to evaluate the efficacy of the sampling plan design. Representativeness was demonstrated by providing full descriptions in the project scoping documents of the sampling techniques and the rationale used for selecting sampling locations. Completeness is defined as the percentage of measurements that are judged to be valid compared to the total number of measurements made. There were no data rejected and or seen as not usable due to quality control or sampling issues. Comparability is another qualitative measure designed to express the confidence with which one data set may be compared to another. Factors that affect comparability are sample collection and handling techniques, sample matrix type, and analytical method. Comparability is limited by the other PARCC parameters because data sets can be compared with confidence only when precision and accuracy are known. Data from this investigation are comparable with other previous data collected at the site due to the laboratories use of EPA or appropriate methods to analyze the samples and supported by the results of the laboratory's analytical reports. 6. Conclusion A review of the analytical data submitted regarding the investigation of PPL Poplar Tent Road soil vapor sampling event in July 2019 by Jacobs has been completed. The validation demonstrated that the analytical systems were in control and all data results can be used in the decision -making process. urofins U Environment Testing TestAmerica ANALYTICAL REPORT L Eurofins TestAmerica, Knoxville 5815 Middlebrook Pike Knoxville, TN 37921 Tel: (865)291-3000 F Laboratory Job ID: 140-16144-1 F Laboratory Sample Delivery Group: WO 1907235 Client Project/Site: Poplar Tent Road Foi CH2M Hill, Inc. 14120 Ballantyne Corporate Place Suite 200 Charlotte, North Carolina 28277 Attn: Mike Skeean Authorized for release by. 712512019 4:03:39 PM Jamie McKinney, Senior Project Manager (865)291-3000 jamie.mckinney@testamericainc.com The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. Client: CH2M Hill, Inc. Project/Site: Poplar Tent Road Table of Contents Laboratory Job ID: 140-16144-1 F SDG: WO 1907235 U CoverPage .............................................. 1 Table of Contents ......................................... 2 Definitions/Glossary....................................... 3 Case Narrative ........................................... 4 Detection Summary ........................................ 5 Client Sample Results ...................................... 6 Surrogate Summary ....................................... 7 QC Sample Results ........................................ 8 QC Association Summary ................................... 9 Lab Chronicle ............................................ 10 Method Summary ......................................... 11 Sample Summary ......................................... 12 Chain of Custody .......................................... 13 Eurofins TestAmerica, Knoxville Page 2 of 13 7/25/2019 Definitions/Glossary Client: CH2M Hill, Inc. Project/Site: Poplar Tent Road Qualifiers Subcontract Qualifier Qualifier Description U COMPOUND ANALYZED FOR BUT NOT DETECTED ABOVE THE DETECTION LIMIT Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) PQL Practical Quantitation Limit QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) Job ID: 140-16144-1 SDG: WO 1907235 Eurofins TestAmerica, Knoxville Page 3 of 13 7/25/2019 Case Narrative Client: CH2M Hill, Inc. Project/Site: Poplar Tent Road Job ID: 140-16144-1 Laboratory: Eurofins TestAmerica, Knoxville Narrative Job Narrative 140-16144-1 Comments No additional comments. Job ID: 140-16144-1 SDG: WO 1907235 Receipt The samples were received on 7/11/2019 9:40 AM; the samples arrived in good condition, properly preserved and, where required, on ice Receipt Exceptions I Sample identifications for samples SV-5R-071019 and SV-5RD-071019 were not provided on the sample tags. Identification was based by matching the tube number between the Chain of Custody and the sample tags. T017 A sampling volume of 0.25 L was used to convert ng to ug/m3 for the associated Lab Blank. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Eurofins TestAmerica, Knoxville Page 4 of 13 7/25/2019 Detection Summary Client: CH2M Hill, Inc. Job ID: 140-16144-1 Project/Site: Poplar Tent Road SDG: WO 1907235 Client Sample ID: SV-511-071019 Lab Sample ID: 140-16144-1 ENo Detections. Client Sample ID: SV-5RD-071019 Lab Sample ID: 140-16144-2 ENo Detections. This Detection Summary does not include radiochemical test results. Eurofins TestAmerica, Knoxville Page 5 of 13 7/25/2019 Client Sample Results Client: CH21VI Hill, Inc. Project/Site: Poplar Tent Road Client Sample ID: SV-511-071019 Date Collected: 07/10/19 09:25 Date Received: 07/11/19 09:40 Job ID: 140-16144-1 SDG: WO 1907235 Lab Sample ID: 140-16144-1 Matrix: Air Method: Local Method - General Subcontract Method Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-METHYLNAPHTHALENE ND U 20 2.6 UG/M3 07/11/19 21:27 07/11/19 21:27 1.00 NAPHTHALENE ND U 20 1.7 UG/M3 07/11/19 21:27 07/11/19 21:27 1.00 Surrogate %Recovery Qualifier Limits Prepared Analyzed DY Fac NAPHTHALENE-D8 148 50 - 150 07111119 21:27 07111119 21:27 1.00 Client Sample ID: SV-5RD-071019 Date Collected: 07/10/19 09:28 Date Received: 07/11/19 09:40 Lab Sample ID: 140-16144-2 Matrix: Air L a Method: Local Method - General Subcontract Method Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-METHYLNAPHTHALENE ND U 20 2.6 UG/M3 07/12/19 00:44 07/12/19 00:44 1.00 NAPHTHALENE ND U 20 1.7 UG/M3 07/12/19 00:44 07/12/19 00:44 1.00 Surrogate %Recovery Qualifier Limits Prepared Analyzed DU Fac NAPHTHALENE-D8 138 50 - 150 07112119 00:44 07112119 00:44 1.00 Page 6 of 13 Eurofins TestAmerica, Knoxville 7/25/2019 Surrogate Summary Client: CH21VI Hill, Inc. Job ID: 140-16144-1 Project/Site: Poplar Tent Road SDG: WO 1907235 Method: Local Method - General Subcontract Method Matrix: Air Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) iTHALEN Lab Sample ID Client Sample ID (50-150) 140-16144-1 SV-5R-071019 148 140-16144-2 SV-5RD-071019 138 Surrogate Legend NAPHTHALENE-D8 = NAPHTHALENE-D8 Method: Local Method - General Subcontract Method Matrix: AIR Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) -ITHALEN Lab Sample ID Client Sample ID (50-150) 1907235-03A Method Blank 102 1907235-05A Lab Control Sample 110 1907235-05AA Lab Control Sample Dup 94 Surrogate Legend NAPHTHALENE-D8 = NAPHTHALENE-D8 Eurofins TestAmerica, Knoxville Page 7 of 13 7/25/2019 QC Sample Results Client: CH21VI Hill, Inc. Project/Site: Poplar Tent Road Method: Local Method - General Subcontract Method Lab Sample ID: 1907235-03A Matrix: AIR Analysis Batch: 11071107 Analyte 2-METHYLNAPHTHALENE NAPHTHALENE Blank Blank Result Qualifier RL ND U 20 ND U 20 Blank Blank Surrogate %Recovery Qualifier NAPHTHALENE-D8 102 Limits 50-150 Job ID: 140-16144-1 SDG: WO 1907235 Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 11071107_P MDL Unit D Prepared Analyzed Dil Fac UG/M3 07/11/1913:29 07/11/1913:29 1.00 UG/M3 07/11/1913:29 07/11/1913:29 1.00 Prepared Analyzed Dil Fac 0711111913:29 0711111913:29 1.00 Lab Sample ID: 1907235-05A Client Sample ID: Lab Control Sample Matrix: AIR Prep Type: Total/NA Analysis Batch: 11071107 Prep Batch: 11071107_P Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits 2-METHYLNAPHTHALENE 100 106 UG/M3 106 70-130 NAPHTHALENE 100 110 UG/M3 110 70-130 LCS LCS Surrogate %Recovery Qualifier Limits NAPHTHALENE-D8 110 50 - 150 Lab Sample ID: 1907235-05AA Client Sample ID: Lab Control Sample Dup Matrix: AIR Prep Type: Total/NA Analysis Batch: 11071107 Prep Batch: 11071107 P Spike LCS Dup LCS Dup %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 2-METHYLNAPHTHALENE 100 108 UG/M3 108 70-130 1.9 25 NAPHTHALENE 100 110 UG/M3 110 70-130 0 25 LCS Dup LCS Dup Surrogate %Recovery Qualifier Limits NAPHTHALENE-D8 94 50 - 150 Page 8 of 13 Eurofins TestAmerica, Knoxville 7/25/2019 QC Association Summary Client: CH21VI Hill, Inc. Project/Site: Poplar Tent Road Subcontract Analysis Batch: 11071107 Job ID: 140-16144-1 SDG: WO 1907235 Lab Sample ID Client Sample ID Prep Type Matrix Method 140-16144-1 SV-5R-071019 Total/NA Air Local Method 140-16144-2 SV-5RD-071019 Total/NA Air Local Method 1907235-03A Method Blank Total/NA AIR Local Method 1907235-05A Lab Control Sample Total/NA AIR Local Method 1907235-05AA Lab Control Sample Dup Total/NA AIR Local Method Prep Batch: 11071107_P Lab Sample ID Client Sample ID Prep Type Matrix Method 140-16144-1 SV-5R-071019 Total/NA Air NONE 140-16144-2 SV-5RD-071019 Total/NA Air NONE 1907235-03A Method Blank Total/NA AIR NONE 1907235-05A Lab Control Sample Total/NA AIR NONE 1907235-05AA Lab Control Sample Dup Total/NA AIR NONE Prep Batch 11071107_P 11071107_P 11071107_P 11071107_P 11071107_P Prep Batch Eurofins TestAmerica, Knoxville Page 9 of 13 7/25/2019 Lab Chronicle Client: CH21VI Hill, Inc. Project/Site: Poplar Tent Road F Job ID: 140-16144-1 SDG: WO 1907235 Client Sample ID: SV-5R-071019 Lab Sample ID: 140-16144-1 Date Collected: 07/10/19 09:25 Matrix: Air Date Received: 07/11/19 09:40 Batch Batch Prep Type Type Method Run Total/NA Prep NONE Total/NA Analysis Local Method Instrument ID: Client Sample ID: SV-5RD-071019 Date Collected: 07/10/19 09:28 Date Received: 07/11/19 09:40 Batch Batch Prep Type Type Method Run Total/NA Prep NONE Total/NA Analysis Local Method Instrument ID: Client Sample ID: Method Blank Date Collected: N/A Date Received: N/A Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab 1 11071107 07/11/19 21:27 Eurofins _P 1.00 11071107 07/11/19 21:27 SU Eurofins Ldu Jdfitple ILJ: I'FU- 10l4�F-L Matrix: Air Dil Initial Final Batch Prepared F Factor Amount Amount Number or Analyzed Analyst Lab M 1 11071107 07/12/19 00:44 Eurofins _P 1.00 11071107 07/12/19 00:44 SU Eurofins Lab Sample ID: 1907235-03A Matrix: AIR C Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep NONE 1 11071107 07/11/1913:29 Eurofins _P Total/NA Analysis Local Method 1.00 11071107 07/11/19 13:29 SU Eurofins Instrument ID: Client Sample ID: Lab Control Sample Lab Sample ID: 1907235-05A Date Collected: N/A Matrix: AIR Date Received: N/A Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep NONE 1 11071107 07/11/1910:11 Eurofins _P Total/NA Analysis Local Method 1.00 11071107 07/11/19 10:11 SU Eurofins Instrument ID: Client Sample ID: Lab Control Sample Dup Lab Sample ID: 1907235-05AA Date Collected: N/A Matrix: AIR Date Received: N/A Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep NONE 1 11071107 07/11/1912:09 Eurofins _P Total/NA Analysis Local Method 1.00 11071107 07/11/19 12:09 SU Eurofins Instrument ID: Laboratory References: Eurofins = Eurofins Air Toxics, 180 Blue Ravine Road„ Suite B, Folsom, CA 95630 Page 10 of 13 Eurofins TestAmerica, Knoxville 7/25/2019 Method Summary Client: CH21VI Hill, Inc. Project/Site: Poplar Tent Road Method Method Description Protocol Subcontract T017 - naphthalene and 2-methylnaphthalene None Protocol References: None = None Laboratory References: Eurofins = Eurofins Air Toxics, 180 Blue Ravine Road„ Suite B, Folsom, CA 95630 F Job ID: 140-16144-1 SDG: WO 1907235 Laboratory Eurofins L Eurofins TestAmerica, Knoxville Page 11 of 13 7/25/2019 Sample Summary Client: CH21VI Hill, Inc. Project/Site: Poplar Tent Road Job ID: 140-16144-1 SDG: WO 1907235 Lab Sample ID Client Sample ID Matrix Collected Received Asset ID 140-16144-1 SV-5R-071019 Air 07/10/19 09:25 07/11/19 09:40 140-16144-2 SV-5RD-071019 Air 07/10/19 09:28 07/11/19 09:40 Eurofins TestAmerica, Knoxville Page 12 of 13 7/25/2019 .A C Gl ro C. a- v c Q m 3 rn ro O ' Q ��. CD (D O {p N -0 0 0 ..Q 3CD-4 rD pj V a _T a �' � ® a � � cr 0 < CD , ro 3 cn a f i7 r 3 m Q ,C �- — 0 m .s 6 0 Lei r p m m m Z m n -n 'tl X m ® c -0m_?2- mm a Q-s. Al at' J1 C rt to �% orM ��aIDw�cp (DZ Cl). OO (D 0,<romm E N a Q IID= �W �m. CrC v 22x0'v °�Oc N n �D _ in cn o C a m to O 1n C UnEOID. o (0 C:3 GC_7L C' fl_CD N O W 5' m (D O Z mmwcuw�� ❑ ❑ ID N < U1 N 70•� o c, � 0 � tz Cif 16, CD CD . C CD 3 CD' rn-r .`. 0 H- 6 CD (nZ " 3 o p l< _v, w 3 g w o O O m N n m m V4 nr e o oo aN CD m On A g t0 � .w-. P A tQ O O N SQ co IV O N 3 w ff,] N C� too F C ^�- x- ^ ro N � O m =o m p 10 O g ` Er a w m lipram -� J •" ❑ .S" m Z 00 ti 0 N ° a C -n n =' w R m R 0 m i y CD� m �y c ❑ ❑`❑ ❑.'ate+ cti0C A ' 0 m v�i CD >to O —Moo ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ p indoor Air ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Outdoor Air 00 o ❑ ❑ ❑ ❑ ❑ ❑ ❑ L -U, soil vapor`lb-11 ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Other ( ) o -1 Page 13 of 13 7/25/2019