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Home My WebLink About16041_Flemming Sub-Slab Mod and Eval 2020_2021012901/29/2021 FIGURES Site Map SITE LAYOUT MAP Fleming Laboratories 2205, 2209 and 2215 Thrift Road Charlotte, Mecklenburg County, North Carolina 2701 Westport Road Charlotte, NC 71187236 FJD CLC CLC N.T.S. March 2020 Scale: 1 FIGUREProject Manager: Drawn by: Checked by: Approved by: Project No. File Name: Date: FJD Office Warehouse Undergoing Building Renovations Approximate location of buried hazardous soils Remove/Relocate TABLE Location Vacuum "H2O Air Flow CFM Location Vacuum "H2O Air Flow CFM vac +/- cfm +/- SS-1 -1.564 na SS-1 -0.866 na -0.698 na SS-2 -2.756 na SS-2 -0.289 na -2.467 na SS-3 -0.864 na SS-3 -0.152 na -0.712 na SS-4 -1.593 na SS-4 -0.023 na -1.570 na B1 -1.003 46.51 B1 -1.367 28.10 0.364 -18.41 B2 -2.274 156.86 B2 -2.061 95.44 -0.213 -61.42 B3 -3.963 160.59 B3 -2.112 137.27 -1.851 -23.32 B4 -1.31 92.0 B4 -1.47 47.14 0.160 -44.86 S1-1 -0.766 33.06 S1-1 can't find x x x S1-2 -0.878 19.58 S1-2 off off x x S1-3 -0.88 27.63 S1-3 -0.702 111.48 -0.178 83.85 S1-4 -0.902 11.72 S1-4 -1.226 2.12 0.324 -9.6 S1-5 -0.902 10.9 S1-5 off off x x S1-6 -0.962 18.45 S1-6 can't find x x x S2-1 -3.322 70.1 S2-1 can't check x x x S2-2 -3.574 35.8 S2-2 -1.132 52.03 -2.442 16.23 S2-3 -1.733 23.63 S2-3 -1.248 57.85 -0.485 34.22 S2-4 -3.695 49.19 S2-4 -1.056 92.79 -2.639 43.6 S2-5 -3.576 58.03 S2-5 -1.271 19.83 -2.305 -38.2 S3-1 -1.977 53.17 S3-1 -1.556 54.72 -0.421 1.55 S3-2 -1.995 12.38 S3-2 -1.711 3.67 -0.284 -8.71 S3-3 -2.394 23.28 S3-3 -1.683 31.27 -0.711 7.99 S3-4 -0.27 38.48 S3-4 -1.667 34.49 1.397 -1.397 S3-5 -1.98 10.66 S3-5 -1.725 8.23 -0.255 -2.43 S3-6 -1.906 85.34 S3-6 -1.430 82.84 -0.476 -2.5 S4-1 -0.834 34.05 S4-1 -0.904 43.10 0.070 9.05 S4-2 -0.916 37.68 S4-2 -1.006 43.92 0.090 6.24 S4-3 -1.062 12.44 S4-3 can't check x x x S4-4 -0.932 32.12 S4-4 -0.998 46.89 0.066 14.77 S4-5 -0.989 12.3 S4-5 off off x x S4-6 off off S4-6 off off x x S4-7 -0.786 49.61 S4-7 -0.883 x 0.097 x Former Fleming Lab Sub Slab Monitoring Measurements *** Target pressure for Vapor Pins SS-1, SS-2, SS-3, SS-4 ( minimum -0.008 "h20 ) per the November 8,2017 Sub Slab Depressurization System Installation Report prepared by Hart & Hickman. Date Readings Taken 6-7-2019 Date Readings Taken 2-17-2020 Location Vacuum "H2O Air Flow CFM vac +/- cfm +/-Location Vacuum "H2O Air Flow CFM vac +/- cfm +/- SS-1 -0.139 na -0.727 na SS-1 -1.141 na 1.002 na SS-2 -0.889 na 0.60 na SS-2 -0.488 na -0.401 na SS-3 -0.280 na 0.128 na SS-3 -0.512 na 0.232 na SS-4 -0.043 na 0.02 na SS-4 -0.281 na 0.238 na B1 not checked not checked x x B1 -1.244 24.17 -0.123 -3.93 B2 not checked not checked x x B2 -1.974 89.91 -0.087 -5.53 B3 not checked not checked x x B3 -1.088 111.84 -1.024 -25.43 B4 not checked not checked x x B4 -1.293 57.69 -0.177 10.55 S1-1 can't find x x x S1-1 can't find x x x S1-2 -1.096 0.38 x x S1-2 -1.098 5.69 0.002 5.31 S1-3 -0.681 12.36 -0.021 -99.12 S1-3 -0.762 96.61 0.081 84.25 S1-4 -1.17 0.8 -0.056 -1.32 S1-4 -1.193 9.16 0.023 8.36 S1-5 -1.076 1.04 x x S1-5 -1.081 5.77 0.005 4.73 S1-6 can't find x x x S1-6 can't find x x x S2-1 can't check x x x S2-1 can't check x x x S2-2 -1.698 5.1 0.566 -46.93 S2-2 -2.463 36.28 0.765 31.18 S2-3 -1.842 4.78 0.594 -53.07 S2-3 -2.552 38.53 0.71 33.75 S2-4 -1.543 10.66 0.487 -82.13 S2-4 -2.411 67.06 0.868 56.4 S2-5 -1.785 3.35 0.514 -16.48 S2-5 -2.513 33.7 0.728 30.35 S3-1 -1.441 6.61 -0.115 -48.11 S3-1 -1.575 59.61 0.134 53 S3-2 -1.548 0.74 -0.163 -2.93 S3-2 -1.687 2.14 0.139 1.4 S3-3 -1.409 6.67 -0.274 -24.6 S3-3 -1.593 48.9 0.184 42.23 S3-4 -1.507 3.18 -0.16 -31.31 S3-4 -1.633 27.06 0.126 23.88 S3-5 -1.537 1.06 -0.188 -7.17 S3-5 -1.674 6.32 0.137 5.26 S3-6 -1.342 8.16 -0.088 -74.68 S3-6 -1.482 65.93 0.14 57.77 S4-1 -0.867 4.21 -0.037 -38.89 S4-1 -0.741 36.49 -0.126 32.28 S4-2 -0.952 4.39 -0.054 -39.53 S4-2 -0.844 37.99 -0.108 33.6 S4-3 can't check can't check x x S4-3 can't check x x x S4-4 -0.871 4.33 -0.127 -42.56 S4-4 -0.854 31.29 -0.017 26.96 S4-5 -0.942 0.95 x x S4-5 -0.856 13.62 -0.086 12.67 S4-6 -0.646 5.81 x x S4-6 -0.504 59.06 -0.142 53.25 S4-7 -0.619 can't check -0.264 x S4-7 -0.636 can't check 0.017 x Former Fleming Lab Sub Slab Monitoring Measurements *** Target pressure for Vapor Pins SS-1, SS-2, SS-3, SS-4 ( minimum -0.008 "h20 ) per the November 8,2017 Sub Slab Depressurization System Installation Report prepared by Hart & Hickman. Date Readings Taken 4-30-2020 Date Readings Taken 8-27-2020 MEASUREMENT REPORT/PHOTOS February 19, 2020 DES project # 20-100 Mr. Neal McElveen Terracon Consultants, Inc. 2701 Westport Road Charlotte, North Carolina 28208 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 DES provided a TSI model 9565 with 964 probe to collect vacuum and air flow measurements of sub slab vapor points while Vapor Intrusion Blower System is in operation. It is worth mentioning that interior of building remains under construction. Measurements were collected at SS-1, SS-2, SS-3 and SS-4 vapor pins which were installed in floor slab. Measurements were collected at sixteen riser points. Riser points SP1-2, SP1-5, SP4-3, SP4-5 and SP4-6 gate valves are closed and not in use. Riser points SP1-1 and SP1-6 could not be located due to interior building construction. Riser point SP2-1 port opening next to wall framing and was unable to access. Riser points SP1-4, SP3-5 and SP4-5 have been moved next to interior wall to open flooring space. Former points remain open in concrete allowing ambient air to be pulled back under slab. Blower system # 3 / Riser # 1 (SP3-1) has a broken gate valve, handle is missing and appears that valve body is damaged. Noticeable air leaking at valve. Damaged gate valve was discovered during the June 2019 inspection. During construction, electrical components are now housed in a separate room. Blower B1, B2, B3 and B4 Dwyer Magnahelic gauges are each reading zero. Sensaphone showing Alarm status, and Alarm warning light OFF. Appears tubing network isn’t connected to riser trunk lines or kinked off, no pressure on tubing. Noticeable air leaking from above head piping network in center of building. Measurements were collected at inlet side of each Blower Unit, B1, B2, B3 and B4. Note: Blower Unit # 1 wiring exposed – conduit missing. Verified piping and connections were secured. Verified support fasteners were secured. See images and notes on attached table. Sub Slab vacuum and air flow measurements shown in attached table. Terracon Consultants, Inc. DES Project No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 1 Blower Unit # 1 - electrical conduit missing and wiring exposed. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 2 Blower Unit # 1 connections and piping supports secured, wiring exposed. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 3 Blower Unit # 3 Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 4 Blower Unit # 4 - showing Dura Blok under support, but not under original location. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 5 Blower Unit # 4 - showing three of the four Dura Blok supports not in correct position. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 6 Blower Unit # 4 – another view. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 7 Blower Unit # 4 – another view. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 8 Blower Units # 2, # 3 Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 9 Blower Unit # 2, # 3 – shows one unit leaning slightly due to missing Dura Blok support under one side. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 10 Blower Units # 2, # 3 – another view showing missing Dura Blok support. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 11 Blower Units # 2, # 3 – another view of missing Dura Blok support. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 12 Blower Units # 2, # 3 – shows inlet screen, each as above picture. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 13 Shows former riser point (SP4-5) location open allowing ambient air to be pulled back under slab. Not pictured is former riser point (SP1-4) which is same as above – pulling ambient air. Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 14 Shows Dwyer Magnahelic gauges at zero and Alarm warning light off. Shows Sensaphone powered with Alarm status, (gauge # 4 was zero during inspection). Terracon Consultants, Inc. DES Proposal No. 20-100 Former Fleming Lab Sub Slab Depressurization System Monitoring February 17, 2020 Image # 15 Shows one of the VFD drives, each operating at 20.0 hz. 2020 Sub-Slab Depressurization System Modification and Evaluation Fleming Laboratories (NCBP #16041-12-060)Charlotte, NC September 2020 Terracon Project No. 71187236 Photo #1 Typical view of piping nests with flowable epoxy seal applied to repair slab. Photo #2 Typical view of epoxy applied to crack/leaks of the concrete slab. 2020 Sub-Slab Depressurization System Modification and Evaluation Fleming Laboratories (NCBP #16041-12-060)Charlotte, NC September 2020 Terracon Project No. 71187236 Photo #3 View of system vacuum gauges for blowers indicating system operating. 2020 Sub-Slab Depressurization System Modification and Evaluation Fleming Laboratories (NCBP #16041-12-060)Charlotte, NC September 2020 Terracon Project No. 71187236 Photo #4 Additional view of piping nests at column support where flowable epoxy seal was applied for repairs.