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Home My WebLink AboutWQ0042882_More Information (Received)_20220110Date: August 6, 2021 To: Craig A. and Shannon B. Carter, 8271 Quail Hollow Drive, Harrisburg, NC 28075 From: Daniel W. and Kami J. Downey, 10506 Abberly Village Ln. Apt. 701, Fredericksburg, VA 22407 Subject: Intent to purchase land on Abilene Rd, Concord NC 28025 (Cabarrus Co PIN 55498193060000) The following sets forth the basic terms upon which we would be prepared to purchase land on Abilene Rd, Concord NC 28025 (Cabarrus Co PIN 55498193060000). Contingent upon the State of North Carolina's approval of AWT's design of non -discharge surface application Waste Water Treatment Systems (WWTS), we agree to purchase the land for $15, 0OOOOO. �L r W. Dow ey/KamiJ. Downey 111111"•=mms Cukipui A. Carter / Sha non B. Carter Notary Date IC/ ak0,9,) Engineers and Soil Scientists Agri -Waste Technology, Inc. 501 N. Salem Street, Suite 203 Apex, North Carolina 27502 919-859-0669 www.agriwaste.com Poorva Mokashi, Engineer I NC Department of Environmental Quality Division of Water Resources / Water Quality Permitting NPDES Industrial Permitting, Wastewater Branch 512 N. Salisbury Street Raleigh, NC 27604 Subject: Application No. WQ0042882 Additional Information Request Downey Property WWTS Abilene Road. Concord, NC 28025, Cabarrus County SFR Wastewater Irrigation System Dear Ms. Mokashi, 1/11 /2022 Thank you for your comments regarding the application for the Downey Property WWTS (Application No. WQ0042882). Below, please find a response to each of the questions/comments listed in your letter dated December 2, 2021. To facilitate the review of this response, I have included each point from the comment letter in bold. Comments in section "E. Property Ownership Documentation" will be addressed in a separate response letter including all updated waivers and easements once the Carter Property has been divided and ownership of the divided property has been transferred to the Downey's. F. Soil Evaluation: 1. A portion of the Ksat permeameter test worksheets is cut-off on the left and right edges. Please resubmit these pages. For Ksat#1, from what is seen in the graph, steady state equilibrium has not been achieved because the tail -end of the curve is not horizontal and the last three values of flow rate are varying significantly with time. Please provide an explanation for this result. The Ksat Parameter test worksheets are re -attached to this document. For Ksat #1 In an effort to maintain conservative numbers, the readings from 2:03 to 3:03 were selected in order to calculate a final Ksat rate associated with this test location. Beyond that time an increase in the rate was noted, which cannot always be explained or known due to the nature of these tests — however, it's often assumed that this related the filling of void spaces or root channels after the wetting front reaches these areas for the first time. Given the consistency of the other tests and the fact that this test would have eventually stabilized at an ultimately higher rate than that which was selected, we feel this is appropriate and justified to use. Steady state should not be confused with 3 identical sequential readings. Data can fluctuate in both a positive and negative direction over the readings at each interval in time, but if a trend line is applied to the data and it is horizontal in nature then that is the intent of these tests. Thank you for your assistance with this review. If you have any further questions or comments, please feel free to contact me at 919-367-6316 or via email at cmcgee@agriwaste.com. Regards, (14 i mcik- Chris E. McGee, L.S.S V.P. of Soils and Environmental Testing ATTACHMENT 6: KSAT Information 10 Constant -Head Borehole Permeameter Test Solution: USBR 7300-89 Condition I (Deep WT or Impermeable layer) (File Name • USBR-7300-89-Cond. I Project Name • Downey Boring No . • KSAT #1 Solution and Terminology (USBR 7300-89 Condition I)* Project No Investigators......: T. Hackney & C. McGee KB = QV/(21tH2)[In(H/r+((H/r)2+1)°'5}-((H/r)2+1)°'5/(H/r)+1/(H/r))] Project Location...: Abilene Road, Cabarrus County Date • April 28, 2021 where: Boring Depth • 28 in (Specify units) WCU Base Ht. h: 10.0 cm*** KB: (Coefficient of Permeability) @ base Tmp. TB °C: 25 WCU Susp. Ht. 5: 15.2 cm Q: Rate of flow of water from the borehole Boring Diameter...: 8.9 cm Boring Radius r • 4.45 cm Const. Wtr. Ht. H: 25.2 cm H: Constant height of water in the borehole Soil/Water Tmp. T: 25 °C H/r** 5.7 r: Radius of the cylindrical borehole Dyn. Visc. @ T • 0.000891 kg/m•s Dyn. Visc. @ TB.: 0.000891 kg/m•s V: Dynamic viscosity of water @ T °C/Dyn. Visc. of water @ TB °C VOLUME (ml) Volume Out (ml) TIME (h:mm:ss A/P) Interval Elapsed Time Flow Rate q (ml/min) KB Equivalent Values (hr:min:sec) I (min) (Pm/sec) I (cm/sec) I (cm/day) I (in/hr) I (ft/day) Start Soak 10:20:00 AM 129 #VALUE! 10:33:00 AM 0:13:00 13.00 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! 129 0 11:03:00 AM 0:30:00 30.00 0.00 0.0 0.00E+00 0.0 0.00 0.00 129 0 11:33:00 AM 0:30:00 30.00 0.00 0.0 0.00E+00 0.0 0.00 0.00 129 0 12:03:00 PM 0:30:00 30.00 0.00 0.0 0.00E+00 0.0 0.00 0.00 65 64 12:33:00 PM 0:30:00 30.00 2.13 0.1 1.42E-05 1.2 0.02 0.04 131 12:33:00 PM 50 81 1:03:00 PM 0:30:00 30.00 2.70 0.2 1.80E-05 1.6 0.03 0.05 132 1:03:00 PM 68 64 1:33:00 PM 0:30:00 30.00 2.13 0.1 1.42E-05 1.2 0.02 0.04 132 1:33:00 PM 92 40 2:03:00 PM 0:30:00 30.00 1.33 0.1 8.89E-06 0.8 0.01 0.03 59 33 2:33:00 PM 0:30:00 30.00 1.10 0.1 7.33E-06 0.6 0.01 0.02 29 31 3:03:00 PM 0:30:00 30.00 1.02 0.1 6.78E-06 0.6 0.01 0.02 131 3:03:00 PM 48 83 3:33:00 PM 0:30:00 30.00 2.77 0.2 1.84E-05 1.6 0.03 0.05 132 3:33:00 PM 82 51 4:03:00 PM 0:30:00 30.00 1.68 0.1 1.12E-05 1.0 0.02 0.03 Natural Moisture • Consistency • 5, P Total Time (min) Enter KB Value: 7.67E-02 7.67E-06 0.7 0.01 0.02 USDA Txt./USCS Class: M; C Water Table Depth: 10+ ft. Averaged lowest 3 values (2:03 - 3:03) Struct./% Pass. #200..: Init. Saturation Time.: 343.00 *USBR 7300-89. Condition I exists when the distance from the water surface in the borehole to the water table or an impermiable layer is 23X the depth of the water in the borehole. **H/r z5 - 510. ***Model JP-M1: h = 15cm, Model JP-M2 (3"): h = 10cm, Model JP-JR2 (2") h = 17cm. Johnson Permeameter, LLC. Revised 12/04/2015 Flow Rate Q vs. Total Elapsed Time 3.00 E 2.50 K 2.00 3 0 LL 1.50 1.00 0.50 0.00 50 00 150 200 250 300 350 400 -0.50 Total Elapsed Time (min) I I I I I I I I I I Constant -Head Borehole Permeameter Test Solution: USBR 7300-89 Condition I (Deep WT or Impermeable layer) (File Name • USBR-7300-89-Cond. I Project Name • Downey Boring No . • KSAT #2 Solution and Terminology (USBR 7300-89 Condition I)* Project No Investigators......: T. Hackney & C. McGee KB = QV/(2n.H2)(In(H/r+((H/r)2+1)°'5}-((H/r)2+1)°5/(H/r)+1/(H/r))] Project Location...: Abilene Road, Cabarrus County Date • April 28, 2021 where: Boring Depth • 29 in (Specify units) WCU Base Ht. h: 10.0 cm*** KB: (Coefficient of Permeability) @ base Tmp. TB °C: 25 WCU Susp. Ht. 5: 15.2 cm Q: Rate of flow of water from the borehole Boring Diameter...: 8.9 cm Boring Radius r • 4.45 cm Const. Wtr. Ht. H: 25.2 cm H: Constant height of water in the borehole Soil/Water Tmp. T: 25 °C H/r** 5.7 r: Radius of the cylindrical borehole Dyn. Visc. @ T • 0.000891 kg/m•s Dyn. Visc. @ TB.: 0.000891 kg/m•s V: Dynamic viscosity of water @ T °C/Dyn. Visc. of water @ TB °C VOLUME (ml) Volume Out (ml) TIME (h:mm:ss A/P) Interval Elapsed Time Flow Rate q (ml/min) KB Equivalent Values (hr:min:sec) I (min) (Pm/sec) I (cm/sec) I (cm/day) I (in/hr) I (ft/day) Start Soak 10:25:00 AM 125 #VALUE! 10:34:00 AM 0:09:00 9.00 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! 125 0 11:04:00 AM 0:30:00 30.00 0.00 0.0 0.00E+00 0.0 0.00 0.00 125 1 11:34:00 AM 0:30:00 30.00 0.02 0.0 1.11E-07 0.0 0.00 0.00 64 61 12:04:00 PM 0:30:00 30.00 2.02 0.1 1.34E-05 1.2 0.02 0.04 132 12:04:00 PM 115 18 12:34:00 PM 0:30:00 30.00 0.58 0.0 3.89E-06 0.3 0.01 0.01 101 14 1:04:00 PM 0:30:00 30.00 0.45 0.0 3.00E-06 0.3 0.00 0.01 90 12 1:34:00 PM 0:30:00 30.00 0.38 0.0 2.56E-06 0.2 0.00 0.01 80 10 2:04:00 PM 0:30:00 30.00 0.33 0.0 2.22E-06 0.2 0.00 0.01 53 27 2:34:00 PM 0:30:00 30.00 0.90 0.1 6.00E-06 0.5 0.01 0.02 19 34 3:04:00 PM 0:30:00 30.00 1.13 0.1 7.55E-06 0.7 0.01 0.02 132 3:04:00 PM 96 36 3:34:00 PM 0:30:00 30.00 1 20 0.1 8.00E-06 0.7 0.01 0.02 67 30 4:04:00 PM 0:30:00 30.00 0.98 0.1 6.56E-06 0.6 0.01 0.02 37 30 4:34:00 PM 0:30:00 30.00 1.00 0.1 6.67E-06 0.6 0.01 0.02 Natural Moisture • Consistency • S, P Total Time (min) Enter KB Value: 7.07E-02 7.07E-06 0.6 0.01 0.02 Averaged Lst 3 Values (3:34 - 4:34) USDA Txt./USCS Class: M; C Water Table Depth: 10+ ft. Struct./% Pass. #200..: Init. Saturation Time.: 369.00 *USBR 7300-89. Condition I exists when the distance from the water surface in the borehole to the water table or an impermiable layer is z3X the depth of the water in the borehole. **H/r z5 - 510. ***Model JP-M1: h = 15cm, Model JP-M2 (3"): h = 10cm, Model JP-JR2 (2") h = 17cm. Johnson Permeameter, LLC. Revised 12/04/2015 Flow Rate Q vs. Total Elapsed Time g 2.50 E c; 2.00 1.50 3 0 LL 1.00 �• 0.50 *74 0.00 ♦ 0 50 100 150 200 250 300 350 400 -0.50 Total Elapsed Time (min) I I I I I I I I I I Constant -Head Borehole Permeameter Test Solution: USBR 7300-89 Condition I (Deep WT or Impermeable layer) (File Name • USBR-7300-89-Cond. I Project Name • Downey Boring No . • KSAT #3 Solution and Terminology (USBR 7300-89 Condition I)* Project No Investigators......: T. Hackney & C. McGee KB = QV/(2TtH2)(In(H/r+((H/r)2+1)°'5}-((H/r)2+1)°5/(H/r)+1/(H/r))] Project Location...: Abilene Road, Cabarrus County Date • April 28, 2021 where: Boring Depth • 26 in (Specify units) WCU Base Ht. h: 10.0 cm*** KB: (Coefficient of Permeability) @ base Tmp. TB °C: 25 WCU Susp. Ht. 5: 15.2 cm Q: Rate of flow of water from the borehole Boring Diameter...: 8.9 cm Boring Radius r • 4.45 cm Const. Wtr. Ht. H: 25.2 cm H: Constant height of water in the borehole Soil/Water Tmp. T: 25 °C H/r** 5.7 r: Radius of the cylindrical borehole Dyn. Visc. @ T • 0.000891 kg/m•s Dyn. Visc. @ TB.: 0.000891 kg/m•s V: Dynamic viscosity of water @ T °C/Dyn. Visc. of water @ TB °C VOLUME (ml) Volume Out (ml) TIME (h:mm:ss A/P) Interval Elapsed Time Flow Rate q (ml/min) KB Equivalent Values (hr:min:sec) I (min) (Pm/sec) I (cm/sec) I (cm/day) I (in/hr) I (ft/day) Start Soak 10:15:00 AM 130 #VALUE! 10:32:00 AM 0:17:00 17.00 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! 130 0 11:02:00 AM 0:30:00 30.00 0.00 0.0 0.00E+00 0.0 0.00 0.00 128 2 11:32:00 AM 0:30:00 30.00 0.05 0.0 3.33E-07 0.0 0.00 0.00 121 7 12:02:00 PM 0:30:00 30.00 0.23 0.0 1.56E-06 0.1 0.00 0.00 113 9 12:32:00 PM 0:30:00 30.00 0.28 0.0 1.89E-06 0.2 0.00 0.01 105 8 1:02:00 PM 0:30:00 30.00 0.27 0.0 1.78E-06 0.2 0.00 0.01 97 8 1:32:00 PM 0:30:00 30.00 0.25 0.0 1.67E-06 0.1 0.00 0.00 90 8 2:02:00 PM 0:30:00 30.00 0.25 0.0 1.67E-06 0.1 0.00 0.00 82 8 2:32:00 PM 0:30:00 30.00 0.27 0.0 1.78E-06 0.2 0.00 0.01 73 9 3:02:00 PM 0:30:00 30.00 0.28 0.0 1.89E-06 0.2 0.00 0.01 65 8 3:32:00 PM 0:30:00 30.00 0.27 0.0 1.78E-06 0.2 0.00 0.01 57 8 4:02:00 PM 0:30:00 30.00 0.27 0.0 1.78E-06 0.2 0.00 0.01 49 8 4:32:00 PM 0:30:00 30.00 0.27 0.0 1.78E-06 0.2 0.00 0.01 Natural Moisture • Consistency • VS, VP Total Time (min) Enter KB Value: 1.78E-02 1.78E-06 0.2 0.00 0.01 Water Table Depth: 10+ ft. Used Last Value USDA Txt./USCS Class: M; C Struct./% Pass. #200..: Init. Saturation Time.: 377.00 *USBR 7300-89. Condition I exists when the distance from the water surface in the borehole to the water table or an impermiable layer is 23X the depth of the water in the borehole. **H/r 35 - 510. ***Model JP-M1: h = 15cm, Model JP-M2 (3"): h = 10cm, Model JP-JR2 (2") h = 17cm. Johnson Permeameter, LLC. Revised 12/04/2015 Flow Rate Q vs. Total Elapsed Time 0.30 • • 0.25 a re 0.20 0 LL 0.15 0.10 0.05 0.00 • 0 50 100 150 200 250 300 350 400 -0.05 Total Elapsed Time (min) I I I I I I I I I I E a E 666 CO T 0