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HomeMy WebLinkAboutDRC-2021-019241 - 0901a06880fa4ceef nagement 141-4.! ko,,..,,:1.1.:..11Cortrot NO 1 2021 Energy Fuels Resources (USA) Inc. 225 Union Blvd. Suite 600 Lakewood, CO, US, 80228 303 974 2140 DR C-2021-01924-1 www.energyfuels.corri November 8, 2021 VIA E-MAIL AND EXPRESS DELIVERY Mr. Doug Hansen Director Division of Waste Management and Radiation Control Utah Department of Environmental Quality 195 North 1950 West Salt Lake City, UT 84114-4820 Dear Mr. Hansen: Re: State of Utah Ground Water Discharge Permit ("the Permit") No. UGW370004 White Mesa Uranium Mill — As-Built Report Pursuant to Part I.F.6 of the Permit This letter transmits the As-Built Report for Energy Fuels Resources (USA) Inc.'s ("EFRI's") perched groundwater monitoring well TW4-43. TW4-43 was installed the week of September 13, 2021. TW4-43 was installed with the approval of the State of Utah Division of Waste Management and Radiation Control (DWMRC). TW4-43 was installed primarily to attempt to bound chloroform exceeding 70 [tg/L in TW4-30. The enclosed As-Built Report includes the items required for As-Built Reports in the Permit Part I.F.6, and is being submitted for TW4-43. Please contact the undersigned if you have any questions or require any further information. Yours very truly, ENERGY FUELS RESOURCES (USA) INC. Kathy Weinel Quality Assurance Manager cc: David Frydenlund Garrin Palmer Scott Bakken Logan Shumway Stewart Smith (HGC) HYDRO GEO CHEM, INC. Environmental Science & Technology INSTALLATION AND HYDRAULIC TESTING OF PERCHED WELL TW4-43 WHITE MESA URANIUM MILL NEAR BLANDING, UTAH (AS-BUILT REPORT) November 8, 2021 Prepared for: ENERGY FUELS RESOURCES (USA) INC 225 Union Blvd., Suite 600 Lakewood, Colorado 80228 Prepared by: HYDRO GEO CHEM, INC. 51 West Wetmore Road, Suite 101 Tucson, Arizona 85705 (520) 293-1500 Project Number 7180000.00-01.0 Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 i TABLE OF CONTENTS 1. INTRODUCTION .............................................................................................................. 1 2. DRILLING AND CONSTRUCTION ................................................................................ 3 2.1 Drilling and Logging Procedures ............................................................................ 3 2.2 Construction ............................................................................................................ 3 2.3 Development ........................................................................................................... 3 3. HYDRAULIC TESTING ................................................................................................... 5 3.1 Testing Procedures .................................................................................................. 5 3.2 Hydraulic Test Data Analysis ................................................................................. 5 4. CONCLUSIONS................................................................................................................. 9 5. REFERENCES ................................................................................................................. 11 6. LIMITATIONS ................................................................................................................. 13 TABLES 1 Well Survey Data 2 Slug Test Parameters 3 Slug Test Results FIGURES 1 Location of TW4-43 and Kriged 3rd Quarter 2021 Water Levels, White Mesa Site 2 TW4-43 As-Built Well Construction Schematic APPENDICES A Lithologic Log B Well Development Field Sheets C Slug Test Plots D Slug Test Data Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 ii Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 1 1. INTRODUCTION This report describes the installation, development, and hydraulic testing of perched well TW4-43 at the White Mesa Uranium Mill (the “Mill” or the “site”) near Blanding, Utah. TW4-43 is located approximately 200 feet southeast of existing chloroform well TW4-30 as shown on Figure 1. TW4-43 was installed with the approval of the State of Utah Division of Waste Management and Radiation Control (DWMRC) because, as described in the Exceedance Notice dated July 7, 2021, by the first quarter of 2021, chloroform in TW4-30 exceeded the State of Utah Groundwater Quality Standard (GWQS) of 70 µg/L for two consecutive quarters. The chloroform concentration in TW4-30 was approximately 78.7 µg/L as of the second quarter of 2021. TW4-43 was installed during the week of September 13, 2021 to bound chloroform exceeding 70 µg/L in TW4-30. TW4-43 is located generally cross- to downgradient of TW4-30. Because existing well TW4-35, currently non-detect for chloroform, is located downgradient of TW4-30, only one new cross-gradient bounding well to the southeast of TW4-30 was considered necessary. Development of TW4-43 consisted of surging and bailing on September 21 and September 22, followed by overpumping on October 14 and October 15, 2021. Hydraulic testing consisted of a slug test conducted on October 19, 2021. Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 2 Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 3 2. DRILLING AND CONSTRUCTION Well installation procedures were similar to those used previously at the site for the construction of other perched zone wells (Hydro Geo Chem, Inc. [HGC], 2005). Drilling and construction were performed by Recapture Drilling, and the boring logged by Mr. D. Kapostasy and Mr. T. Boam, employees of Energy Fuels (USA) Corporation (EFRI). An as-built diagram for the well construction, based primarily on information provided by Mr. D. Kapotasy, is shown in Figure 2. The depth to water shown in the as-built diagram was based on water level measurement just prior to surging and bailing. TW4-43 was surveyed by a State of Utah licensed surveyor and the location and elevation data are provided in Table 1. 2.1 Drilling and Logging Procedures A 12-inch diameter tricone bit was used to drill a boring of sufficient diameter to install an 8-inch-diameter, Schedule 80 poly vinyl chloride (PVC) surface (conductor) casing. The surface casing extended to a depth of approximately 10 feet below land surface. Once the surface casing was in place, the borehole was drilled by air rotary using a 6¾- inch diameter polycrystalline diamond compact (PDC) drag bit. The borehole penetrated the Dakota Sandstone and the Burro Canyon Formation and terminated in the Brushy Basin Member of the Morrison Formation. Drill cuttings samples used for lithologic logging were collected at 2½-foot depth intervals and placed in labeled, zip-sealed plastic bags and labeled plastic cuttings storage boxes. A copy of the lithologic log submitted by Mr. Boam is provided in Appendix A. 2.2 Construction TW4-43 was constructed using 4-inch diameter, Schedule 40, flush-threaded PVC casing and 0.02-slot, factory-slotted PVC screen. Colorado Silica Sand was used as a filter pack and installed to a depth of approximately 8 ½ feet above the screened interval. The annular space above the filter pack was sealed with hydrated bentonite chips. The well casing was fitted with a 4-inch PVC cap to keep foreign objects out of the well and a lockable steel security casing was installed to protect the well. 2.3 Development TW4-43 was developed by surging and bailing followed by overpumping. Development records are provided in Appendix B. Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 4 Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 5 3. HYDRAULIC TESTING Hydraulic testing consisted of a slug test conducted by HGC personnel using a methodology similar to that described in HGC (2005). 3.1 Testing Procedures The slug used for the test consisted of a sealed, pea-gravel-filled, schedule 80 PVC pipe approximately three feet long that displaced approximately 3/4 gallons of water as described in HGC (2002). A Level TrollJ 0-30 pounds per square inch absolute (psia) data logger was deployed below the static water column in the well and used to measure the change in water level during the test. A Baro-Troll was used to measure barometric pressure and was placed in a protected environment near the well for the duration of the testing. Automatically logged water level data were collected at 3-second intervals and barometric data at 5-minute intervals. Prior to the test, the static water level was measured by hand using an electric water level meter and recorded in the field notebook. The data logger was then lowered to a depth of approximately ten feet below the static water level in the well and background pressure readings were collected for approximately 60 minutes prior to beginning the test. The purpose of collecting the background data was to allow correction for any detected water level trend. Once background data were collected, the slug and electric water level meter sensor were suspended in the well just above the static water level. The test commenced by lowering the slug to a depth of approximately two feet below the static water level over a period of a few seconds and taking water level readings by hand as soon as possible afterwards. Hand-collected data recorded in the field notebook were obtained more frequently in the first few minutes when water levels were changing more rapidly, then less frequently as the rate of water level change diminished. Upon completion of the test, automatically logged data were checked and backed up on the hard drive of a laptop computer. 3.2 Hydraulic Test Data Analysis Because background (pre-test) automatically logged water level data displayed no noticeable trend during the 60 minutes prior to the test, and barometric pressure changes were sufficiently small, corrections to the data were unnecessary. Test data were analyzed using AQTESOLVTM (HydroSOLVE, 2000), a computer program developed and marketed by HydroSOLVE, Inc. In preparing the automatically logged data for analysis, the total number of records was reduced. All data collected in the first minute were Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 6 retained; then every 2nd, then 3rd, then 4th, etc., record was retained for analysis. For example, if the first 20 records were retained (1 minute of data at 3-second intervals), the next records to be retained would be the 22th, the 25th, the 29th, the 34th, etc. Data were analyzed using two solution methods: the KGS unconfined method (Hyder et al., 1994) and the Bouwer-Rice unconfined method (Bouwer and Rice, 1976). When filter pack porosities were required by the analytical method, a value of 30 percent was used. The saturated thickness was taken to be the difference between the depth of the static water level measured just prior to the test and the depth to the Brushy Basin Member contact as defined in the drilling log (Appendix A). The static water level was below the top of the screened interval and the saturated thickness was taken to be the effective screen length. The KGS solution allows estimation of both specific storage and hydraulic conductivity, while the Bouwer-Rice solution allows estimation of only the hydraulic conductivity. The Bouwer- Rice solution is valid only when a straight line is identifiable on a plot of the log of displacement versus time (indicating that flow is nearly steady), and is insensitive to both storage and the specified initial water level rise. Typically, only the later-time data are interpretable using Bouwer-Rice. The KGS solution accounts for non-steady flow and storage, is sensitive to the specified initial water level rise, and generally allows a fit to both early- and late-time data. Both solutions were used for comparison. Automatically logged and hand-collected data were analyzed separately using both solution methods. The hand-collected data therefore served as an independent data set and a check on the accuracy of the automatically logged data. Table 2 summarizes test parameters and Table 3 and Appendix C provide the results of the analyses. Appendix C contains plots generated by AQTESOLVJ that show the quality of fit between measured and simulated displacements, and reproduce the parameters used in each analysis. Appendix D provides displacement data. Estimates of hydraulic conductivity range from approximately 4.37 x 10-5 centimeters per second (cm/s) to 5.76 x 10-5 cm/s using automatically logged data, and from approximately 5.84 x 10-5 cm/s to 6.4 x 10-5 cm/s using hand-collected data. Estimates are within the range previously measured at the site (approximately 2 x 10-8 cm/s to 0.01 cm/s). In general, the agreement between solution methods and between estimates obtained from automatically logged and hand-collected data is good, and within a factor of 1.5 Although there was generally good agreement between the KGS and Bouwer-Rice results, because the KGS Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 7 solution accounts for non-steady flow and aquifer storage, the results obtained using KGS are considered more representative than those obtained using Bouwer-Rice. Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 8 Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 9 4. CONCLUSIONS Procedures for the installation, hydraulic testing, and development at new perched well TW4-43 are similar to those used previously at the site for the construction, testing, and development of other perched zone wells. Automatically logged and hand-collected slug test data from TW4-43 were analyzed using the KGS and Bouwer-Rice analytical solutions. Estimates of hydraulic conductivity range from approximately 4.37 x 10-5 cm/s to 5.76 x 10-5 cm/s using automatically logged data, and from approximately 5.84 x 10-5 cm/s to 6.4 x 10-5 cm/s using hand-collected data. Estimates are within the range previously measured at the site (approximately 2 x 10-8 cm/s to 0.01 cm/s). In general, the agreement between solution methods and between estimates obtained from automatically logged and hand-collected data is good, and within a factor of 1.5. Although there was generally good agreement between the KGS and Bouwer-Rice results, because the KGS solution accounts for non-steady flow and aquifer storage, the results obtained using KGS are considered more representative than those obtained using Bouwer-Rice. Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 10 Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 11 5. REFERENCES Bouwer, H. and R.C. Rice. 1976. A Slug-Test method for Determining Hydraulic Conductivity of Unconfined Aquifers with Completely or Partially Penetrating Wells. Water Resources Research, Vol. 12, No. 3, Pp. 423-428. Hyder, Z, J.J. Butler, Jr. C.D. McElwee, and W. Liu. 1994. Slug Tests in Partially Penetrating Wells. Water Resources Research, Vol. 30, No. 11, Pp. 2945-2957. Hydro Geo Chem, Inc. (HGC). 2002. Hydraulic Testing at the White Mesa Uranium Mill Near Blanding, Utah During July 2002. Submitted to International Uranium Corporation. August 22, 2002. HGC. 2005. Perched Monitoring Well Installation and Testing at the White Mesa Uranium Mill, April through June 2005. Submitted to International Uranium Corporation. August 3, 2005. HydroSOLVE, Inc. 2000. AQTESOLV for Windows. User=s Guide. Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 12 Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 13 6. LIMITATIONS The information and conclusions presented in this report are based upon the scope of services and information obtained through the performance of the services, as agreed upon by HGC and the party for whom this report was originally prepared. Results of any investigations, tests, or findings presented in this report apply solely to conditions existing at the time HGC’s investigative work was performed and are inherently based on and limited to the available data and the extent of the investigation activities. No representation, warranty, or guarantee, express or implied, is intended or given. HGC makes no representation as to the accuracy or completeness of any information provided by other parties not under contract to HGC to the extent that HGC relied upon that information. This report is expressly for the sole and exclusive use of the party for whom this report was originally prepared and for the particular purpose that it was intended. Reuse of this report, or any portion thereof, for other than its intended purpose, or if modified, or if used by third parties, shall be at the sole risk of the user. Installation and Hydraulic Testing of Perched Well TW4-43 White Mesa Uranium Mill (As-Built Report) H:\718000\TW43\report\TW43_installation.doc November 8, 2021 14 TABLES TABLE 1 Well Survey Data Northing * Easting * Top of Casing Ground (feet) (feet) (feet amsl) (feet amsl) TW4-43 10162346.24 2221129.05 5596.89 5595.17 Notes: amsl = above mean sea level * = state plane coordinates Well H:\718000\TW43\report\tables\TW43_T1_T2_T3.xls: T 1 TABLE 2 Slug Test Parameters Depth to Depth to Depth to Top Depth to Base Saturated Thickness Well Brushy Basin Water of Screen of Screen Above Brushy Basin (feet) (feet) (feet) (feet) (feet) TW4-42 91.0 71.6 35.5 95.5 19.4 Note: All depths are in feet below land surface H:\718000\TW43\report\tables\TW43_T1_T2_T3.xls: T 2 TABLE 3 Slug Test Results Bouwer-Rice Bouwer-Rice Test Saturated Thickness (ft) K (cm/s) Ss (1/ft) K (cm/s) K (cm/s) Ss (1/ft) K (cm/s) TW4-43 19.4 4.37E-05 5.44E-04 5.76E-05 5.84E-05 2.43E-04 6.4E-05 Notes: Bouwer-Rice = Unconfined Bouwer-Rice solution method in Aqtesolve™ cm/s = centimeters per second ft = feet K = hydraulic conductivity KGS = Unconfined KGS solution method in Aqtesolve™ Ss= specific storage Automatically Logged Data Hand Collected Data KGS KGS H:\718000\TW43\report\tables\TW43_T1_T2_T3.xls: T 3 FIGURES HYDRO GEO CHEM, INC.APPROVED DATE REFERENCE FIGURE 1 mile CORRAL CANYON CORRAL SPRINGS COTTONWOOD ENTRANCE SPRING RUIN SPRING WESTWATER Cell 1 Cell 2 Cell 3 Cell 4A Cell 4B MW-01 MW-02 MW-3A MW-11 MW-14MW-15 MW-17 MW-18 MW-19 MW-20 MW-21 MW-22 MW-23 MW-24 MW-25 MW-27 MW-28 MW-29 MW-30 MW-31 MW-32 MW-33 MW-34MW-37 MW-38 MW-39 MW-40 TW4-01 TW4-03 TWN-01 TWN-02 TWN-03 TWN-04 TWN-05 TWN-06 TWN-07 TWN-08 TWN-09 TWN-10 TWN-11 TWN-12 TWN-13 TWN-14 TWN-15 TWN-16 TWN-17 TWN-18 TWN-19 TWN-20 TWN-21 PIEZ-01 PIEZ-02 PIEZ-3A PIEZ-04 PIEZ-05 TW4-05 TW4-12 TW4-13 TW4-31 TW4-32 MW-12 TW4-11TW4-16 TW4-18 TW4-27 MW-26 MW-35 MW-36 TW4-04 TW4-07 TW4-09 TW4-19 TW4-21 TW4-24 TW4-25 TW4-26 TW4-40 TW4-06 TW4-42 TW4-02 TW4-08 MW-04 MW-05 TW4-22 TW4-23 TW4-20 TW4-28 TW4-29 TW4-30 TW4-10 TW4-33 TW4-34 TW4-36 TW4-41TW4-14 TW4-35 TW4-37 TW4-38 TW4-39 DR-05 DR-06 DR-07 DR-08 DR-09 DR-10 DR-11 DR-12 DR-13 DR-14 DR-15 DR-17 DR-19 DR-20 DR-21 DR-22 DR-23 DR-24 5583 5504 5473 5525 54965495 5503 5584 5589 5454 dry 5451 5498 5512 5532 5570 5545 5516 5539 5547 dry 5493 5494 5493 5493 5463 5482 5488 5550 5543 5558 5567 5575 5588 5583 5580 5524 5518 5579 5568 5592 5580 abandoned 5584 5569 abandoned abandoned abandoned abandoned abandoned abandoned 5590 abandoned 5605 abandoned 5583 5607 5565 5556 5504 5502 5568 5569 5536 5568 5563 abnd 5555 5515 5527 5565 55345555 5568 5532 5527 5568 5528 5525 5532 5525 5530 5568 5528 5528 55615557 5528 5529 5528 5524 5558 55355526 5560 5570 5554 5482 5485 5492 5474 5480 5482 5488 5488 5487 5466 5465 5454 5455 5443 5421 dry 5425 5417 5624 5383 5234 5560 5380 5468 (not included) TW4-43 EXPLANATION perched monitoring well showing elevation in feet amsl perched piezometer showing elevation in feet amsl seep or spring showing elevation in feet amsl LOCATION OF TW4-43 AND KRIGED 3rd QUARTER, 2021 WATER LEVELS WHITE MESA SITE H:/718000/TW43/report/figures/TW43loc.srf MW-5 PIEZ-1 RUIN SPRING temporary perched monitoring well showing elevation in feet amsl temporary perched nitrate monitoring well showing elevation in feet amsl TW4-12 TWN-7 5504 5568 5569 5588 5380 estimated dry area 5525 5463 5525 perched monitoring well installed February, 2018 showing elevation in feet amsl NOTES: MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-21, TW4-37, TW4-39, TW4-40 and TW4-41 are chloroform pumping wells; TW4-22, TW4-24, TW4-25 and TWN-2 are nitrate pumping wells; TW4-11 water level is below the base of the Burro Canyon Formation TW4-40 MW-38 TW4-42 temporary perched monitoring well installed April, 2019 showing elevation in feet amsl temporary perched monitoring well installed February, 2018 showing elevation in feet amsl TWN-20 temporary perched nitrate monitoring well installed April, 2021showing elevation in feet amsl5565 temporary perched monitoring well installed September, 2021 TW4-43 SJS 10/27/21 1 CHEM, INC. GEO HYDRO Approved DateDate File Name FigureAuthor TW4-43 AS-BUILT WELL CONSTRUCTION SCHEMATIC SJS 9/28/21 7180291A 2JAA9/28/21 APPENDIX A LITHOLOGIC LOG APPENDIX B WELL DEVELOPMENT FIELD SHEETS APPENIDX C SLUG TEST PLOTS 0.01 0.1 1. 10. 100. 0. 0.2 0.4 0.6 0.8 1. Time (min) Di s p l a c e m e n t ( f t ) WELL TEST ANALYSIS Data Set: H:\718000\TW43\SlugTest\aqtesolve\tw43.aqt Date: 10/21/21 Time: 11:48:24 PROJECT INFORMATION Company: HGC Client: EFRI Test Well: TW4-42 AQUIFER DATA Saturated Thickness: 19.4 ft WELL DATA (tw4-43) Initial Displacement: 0.65 ft Static Water Column Height: 19.4 ft Total Well Penetration Depth: 19.4 ft Screen Length: 19.4 ft Casing Radius: 0.167 ft Well Radius: 0.28 ft Gravel Pack Porosity: 0.3 SOLUTION Aquifer Model: Unconfined Solution Method: KGS Model Kr = 4.366E-5 cm/sec Ss = 0.000544 ft-1 Kz/Kr = 0.1 0. 20. 40. 60. 80. 100. 0.01 0.1 1. Time (min) Di s p l a c e m e n t ( f t ) WELL TEST ANALYSIS Data Set: H:\718000\TW43\SlugTest\aqtesolve\tw43br.aqt Date: 10/21/21 Time: 11:49:04 PROJECT INFORMATION Company: HGC Client: EFRI Test Well: TW4-42 AQUIFER DATA Saturated Thickness: 19.4 ft Anisotropy Ratio (Kz/Kr): 0.1 WELL DATA (tw4-43) Initial Displacement: 0.65 ft Static Water Column Height: 19.4 ft Total Well Penetration Depth: 19.4 ft Screen Length: 19.4 ft Casing Radius: 0.167 ft Well Radius: 0.28 ft Gravel Pack Porosity: 0.3 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 5.756E-5 cm/sec y0 = 0.3944 ft 0.01 0.1 1. 10. 100. 0. 0.2 0.4 0.6 0.8 1. Time (min) Di s p l a c e m e n t ( f t ) WELL TEST ANALYSIS Data Set: H:\718000\TW43\SlugTest\aqtesolve\tw43h.aqt Date: 10/21/21 Time: 11:49:26 PROJECT INFORMATION Company: HGC Client: EFRI Test Well: TW4-42 AQUIFER DATA Saturated Thickness: 19.4 ft WELL DATA (tw4-43) Initial Displacement: 0.65 ft Static Water Column Height: 19.4 ft Total Well Penetration Depth: 19.4 ft Screen Length: 19.4 ft Casing Radius: 0.167 ft Well Radius: 0.28 ft Gravel Pack Porosity: 0.3 SOLUTION Aquifer Model: Unconfined Solution Method: KGS Model Kr = 5.835E-5 cm/sec Ss = 0.0002434 ft-1 Kz/Kr = 0.1 0. 20. 40. 60. 80. 100. 0.01 0.1 1. Time (min) Di s p l a c e m e n t ( f t ) WELL TEST ANALYSIS Data Set: H:\718000\TW43\SlugTest\aqtesolve\tw43hbr.aqt Date: 10/21/21 Time: 11:49:46 PROJECT INFORMATION Company: HGC Client: EFRI Test Well: TW4-42 AQUIFER DATA Saturated Thickness: 19.4 ft Anisotropy Ratio (Kz/Kr): 0.1 WELL DATA (tw4-43) Initial Displacement: 0.65 ft Static Water Column Height: 19.4 ft Total Well Penetration Depth: 19.4 ft Screen Length: 19.4 ft Casing Radius: 0.167 ft Well Radius: 0.28 ft Gravel Pack Porosity: 0.3 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 6.398E-5 cm/sec y0 = 0.3944 ft APPENDIX D SLUG TEST DATA TW43disp.txt TW4-43 automatically logged displacement ET (min) displ (ft) 0 0.87142 0.05 0.59182 0.1 0.64541 0.15 0.6524 0.2 0.64308 0.25 0.61978 0.3 0.63143 0.35 0.63143 0.4 0.61512 0.45 0.61745 0.5 0.61046 0.55 0.59415 0.6 0.58483 0.65 0.6058 0.7 0.59881 0.75 0.57784 0.8 0.59415 0.85 0.57784 0.9 0.57551 0.95 0.58483 1.05 0.57085 1.2 0.57085 1.4 0.56852 1.65 0.54289 1.95 0.53357 2.3 0.5126 2.7 0.4893 3.15 0.47998 3.65 0.46833 4.2 0.44969 4.8 0.44037 5.45 0.42406 6.15 0.39843 6.9 0.37746 7.7 0.3728 Page 1 TW43disp.txt 8.55 0.3495 9.45 0.34251 10.4 0.30756 11.4 0.30523 12.45 0.28659 13.55 0.27494 14.7 0.25397 15.9 0.26096 17.15 0.22601 18.45 0.23067 19.8 0.21436 21.2 0.20271 22.65 0.19572 24.15 0.19572 25.7 0.17708 27.3 0.16077 28.95 0.15378 30.65 0.15611 32.4 0.1398 34.2 0.12815 36.05 0.12815 37.95 0.1398 39.9 0.11883 41.9 0.09786 43.95 0.10718 46.05 0.10485 48.2 0.10951 50.4 0.0932 52.65 0.07689 54.95 0.0932 57.3 0.08155 59.7 0.08388 62.15 0.07922 64.65 0.07456 67.2 0.06757 69.8 0.07689 72.45 0.07223 Page 2 TW43disp.txt 75.15 0.08155 77.9 0.07456 80.7 0.06524 83.55 0.05359 86.45 0.0466 89.4 0.06058 92.4 0.05825 95.45 0.06058 98.55 0.05359 101.7 0.05592 104.9 0.05359 108.15 0.05825 111.45 0.05592 114.8 0.05126 118.2 0.04427 121.65 0.04194 125.15 0.04194 128.7 0.05592 132.3 0.04194 135.95 0.04427 139.65 0.04194 143.4 0.03262 147.2 0.05126 151.05 0.03495 154.95 0.04194 158.9 0.03029 162.9 0.03029 166.95 0.03262 171.05 0.04194 175.2 0.04427 179.4 0.02563 183.65 0.02796 187.95 0.03262 192.3 0.03961 196.7 0.03961 Page 3 TW43hdisp.txt TW4-43 hand collected displacement ET (min) displacement 0.000 0.63 0.117 0.61 0.367 0.6 0.567 0.58 0.800 0.58 0.967 0.57 1.183 0.56 1.400 0.55 1.717 0.54 1.933 0.53 2.150 0.52 2.300 0.51 2.467 0.5 2.867 0.49 3.050 0.48 3.383 0.47 3.733 0.46 4.133 0.45 4.783 0.44 4.983 0.43 5.183 0.42 5.717 0.41 6.183 0.4 6.483 0.39 7.017 0.38 7.567 0.37 7.933 0.36 8.533 0.35 9.050 0.34 9.600 0.33 10.133 0.32 10.667 0.31 11.617 0.3 12.167 0.29 12.583 0.28 13.550 0.27 14.517 0.26 15.833 0.25 16.467 0.24 17.067 0.23 17.833 0.22 19.017 0.21 21.017 0.2 22.017 0.19 23.017 0.18 24.017 0.17 26.017 0.16 28.017 0.15 30.017 0.14 32.017 0.13 34.017 0.12 37.017 0.11 40.017 0.1 43.017 0.09 47.017 0.09 51.017 0.08 54.017 0.07 59.017 0.07 64.017 0.05 69.017 0.05 79.017 0.04 89.017 0.04 99.017 0.03 109.017 0.02 119.017 0.02 129.017 0.02 139.017 0.02 149.017 0.02 164.017 0.02 179.017 0.02 199.017 0.02 Page 1