TECHNICAL MEMORANDUM

TECHNICAL MEMORANDUM To File ZORRO RANCHMELLFIELD June 6, 2014 C From Casey W. Cook, P.E. Subject ZORRO RANCH WELL 6 TESTING Introduction In early 2014, Zorro Ranch reactivated Well 6, which had been mostly unused since the early 2000s. Figure 1 shows the location of the well. We understand the well was reactivated to make up for lost capacity from the Dakota well, which is out of service with a dropped pump. In reviewing whether Well 6 is suitable to make up for lost Dakota capacity, Balleau Groundwater Inc., (BGW) recommended' that the Ranch rehabilitate and test Well 6 to determine the capacity and sustainable yield. In May 2014, Rodgers and Co. pulled the pump 6 and rehabilitated the well, then installed a temporary pump for testing. The Ranch authorized BGW to coordinate the testing and to report on well capacity and long-term yield. This technical memorandum provides a documentation of Well 6 rehabilitation and testing, projects the well capacity and yield, and recommends a pump capacity. We find the well to be capable of 15 gpm pumping for 10 hours a day, for diversions of up to 10 acre feet per year for several years. Ongoing regional water level declines and self-induced drawdown eventually will reduce well yield to less than 10 AFY with fewer hours of pumping or a lesser pumping rate. Background Well 6 was drilled in 1994 under OSE File No. E-5902, and later renumbered E-6478-S. The well is 215 feet deep and is completed with 6-inch PVC casing with perforations from 100 to 120 and 175 to 215 feet. The drillers log (attached) suggests the well is completed in basin fill alluvium with the primary water-bearing zone identified as a gravel between 172 and 196 ft deep. The basin fill is the primary aquifer of the Estancia Basin. Static water level in 1995 was 87 feet, and is 117 ft today. The 30-foot Electronic Communication from Casey W. Cook, P.E., of Balleau Groundwater, Inc. to Mr. Brice M. Gordon of Zorro Ranch, March 6, 2014 Well 6 Pumping Test. BALLEAU GROUNDWATER, INC. EFTA01124856 2 decline, averaging 1.5 ft/yr, is less than regional declines seen at other Ranch wells in deeper formations, but is similar to trends at other basin fill wells in the area. The ongoing regional decline is expected eventually to reduce the capacity of the well. The proof of completion of well (PCW; attached) indicates Well 6 in 1995 could produce 30 gpm with 100 ft of drawdown. The well is equipped today with a 7.5-hp pump, Grundfos model 40575-25 (pump curve attached) capable of producing 30 gpm against 580 ft of total dynamic head. The installed pump apparently is different than the 1.5-hp pump reported in the PCW. Discharge at the wellhead is piped three miles and 200 feet uphill to the Ranch's main storage reservoir. We understand the Ranch plans to reroute the piping to the Dakota booster pumps (Figure 1). Well 6 is permitted under OSE File No. E-6478, along with Ranch Wells 4 and B (File Nos. E-6478 and E-8976), for diversions of up to 15.5 AFY for domestic, ranch and irrigation purposes. Rehabilitation and Testing Rodgers and Co. mobilized to Well 6 on May 20, 2014. The crew field tested the installed 7.5-hp pump and motor assembly and found that it performed satisfactorily. The pump as installed can produce 75 gpm for several minutes discharging to the ground with no back pressure, but the pumping water level falls rapidly to the pump inlet because the aquifer and well cannot sustain that rate of pumping. Rodgers removed the pump and swabbed acid into the well to rehabilitate the screen, then left the acid overnight. The following day, the driller brushed the well screen and set a temporary pump to 195 ft deep for removing the acid and for testing. Static water level is about 75 feet above the pump setting. Rodgers step tested the well on May 21, 2014. BGW coordinated the test and set a logging transducer in the well to record water levels. For the first step, the well was pumped at 21 gpm for 30 minutes with 40 ft drawdown (Figure 2). Water levels were stable for the last 10 minutes. At the second step of 28 gpm, the pumping water level dropped into the lower screen and rapidly toward the pump inlet. The rate was throttled back to around 20 gpm and the crew continued to pump the well for several hours to remove the remaining acid. After shutdown the well was allowed to recover overnight. BALLEAU GROUNDWATER, INC. EFTA01124857 3 On May 22, Well 6 was tested at rates of 24 to 18 gpm for 9 hours (Figure 3). The pump temporarily lost power about an hour into the test. The initial 24 gpm rate caused the pumping water level (PWL) to draw down into the lower screen, so the rate was valved back to 21 then to 18 gpm. Rate control was poor, resulting in an unsteady drawdown trend. The test was shut down after nine hours. Recovery water levels were monitored for about 39 hours before the test equipment was removed. Recovery data (Figure 4) matched to a Theis (1935)2 recovery line indicates aquifer transmissivity (T) of 90 ft2/d and no apparent hydrologic boundaries. Projection of Well Yield Test data suggest the well can sustain 15 gpm pumping for up to 10 hours, but rates over 20 gpm can dewater the productive zone and cause PWL to drop to the pump inlet. Well specific capacity at 9 hours is 18 gpm / 60 ft = 0.3 gpm/ft, which is in line with the T from recovery and the capacity reported on the PCW form (30 gpm with 100 ft drawdown = 0.3 gpm/ft). However, due to regional declines, well yield is now limited by a shorter water column and less available drawdown above the 172-foot deep productive interval (55 ft today vs. 85 ft in 1995). Pumping at 15 gpm for 10 hours a day year round, the well can produce 10 AFY. That level of usage is projected cause 14 ft of drawdown over the next 5 years (T = 90 ft2/d, S = 0.1, r = 0.5 ft). With another 7.5 feet of regional decline (1.5 ft/yr) over that period, non-pumping water level is projected to decline 20 ft in 5 years. Thereafter, pumping the well at 15 gpm will cause the productive zone to dewater, and the pumping rate will have to be reduced. We project the well can provide 10 AFY for a few years, but that yields will decline after that. The well eventually may need to be replaced by a deeper well or by production increased from an existing well if the Ranch wants to maintain the present capacity. We recommend operating the well to maintain pumping water level above 175 ft to prevent significant dewatering of the production zone. Pumping at 15 gpm for up to a half day day should maintain an acceptable PWL, though the Ranch must monitor water levels and set pump controls to 2 Theis, C.V., 1935, The Relation Between Lowering of the Piezometric Surface and the Rate and Duration of Discharge of a Well Using Ground Water Storage: Transactions of the American Geophysical Union, Volume 16, pp. 519-524. BALLEAU GROUNDWATER, INC. EFTA01124858 4 prevent drawdown to the pump inlet. A new pump will be needed, as the existing pump capacity is too high for the well. A 15-gpm pump is recommended to better suit the well capacity. The pump should be set between 190 and 200 feet deep and should provide 200 ft of lift to the wellhead, plus sufficient pressure to convey water to storage or to the Dakota booster pumps as specified by the Ranch engineer. We recommend setting up the well controls with a variable frequency drive and an interconnected water- level sensor that reduces pumping if the PWL approaches the pump inlet. The pump should be set with a one-inch PVC sounding tube and equipped with a logging transducer to track water levels and monitor well performance. Water Quality The Ranch submitted a water sample from Well 6 for laboratory analysis (report attached). Water quality is good with conductivity at 421 µmhos/cm, and total dissolved solids estimated at 350 ppm. Well 6 water is of better quality than other Ranch wells (Dakota well has conductivity 3500 µmhos and Wells 4, B and K have 1000 µmhos). The major constituents are calcium and bicarbonate; water is considered hard at 181.8 mg/L CaCO3. Nitrates are high, but would be removed for indoor use, along with hardness, by the Ranch household RO systems. Water is suitable for irrigation with no treatment and for drinking with RO treatment. Conclusions 1. Well 6 is capable of yielding 15 gpm. Higher rates above 20 gpm can dewater the primary productive zone and cause water level to fall to the pump inlet. 2. Pumping 15 gpm for 10 hours per day, the well is projected to produce 10 acre feet per year for several years. Yields are expected to decline below 15 gpm and 10 AFY as regional and self- induced drawdowns reduce the available water column. 3. Water from Well 6 is good with 421 µmhos conductivity and is suitable for irrigation use without treatment. The water is hard with high nitrates. Existing household RO treatment will remove those constituents for indoor and drinking use. 4. The existing installed pump is rated for 24 to 55 gpm. A new variable speed pump is required. BALLEAU GROUNDWATER, INC. EFTA01124859 5 Recommendations 1. Replace the existing pump with one that can produce 15 gpm with a lift of 200 ft plus sufficient pressure at the wellhead to convey water to storage or booster pumps. Control the pump with a variable speed drive and sensors to reduce rate if pumping water level approaches the pump inlet. 2. Set the pump with a PVC sounding tube accessible at the wellhead. Equip the well with a logging pressure transducer to track water levels and well performance. 3. As capacity declines, plan to replace Well 6 in several years with a deeper well or with additional pumping from existing wells. Attachments: Figures (4) Well Record Proof of Completion Pump Curve Well 6 Lab Analysis BALLEAU GROUNDWATER, INC. EFTA01124860 are *lei+ Main Storagpi lar, (25,000 gal) 0 Booster P,Jrnos Well 6 0 1.000 2.000 3.000 Feet ~ 1 1 1 ! 1 ! ! I ! 1 ! l l l l Prcloction NAO83 New MeNco Conti& Zone CATE C911,2014 PRCI'L rep a, oY l,10;OO,0 br ewe FiLk UM% W0/161.4c.nual ZORRO RANCH / WELLFIELD WELL 6 LOCATION FIGURE 1 EFTA01124861 ZORRO RANCH WELLFIEW FIGURE 2 WELL 6 STEP TEST 0 10 20 • • 30 • • • • E z 40 .. Q= 21 gpm • 4. • • . . **** **** 1144.600. 0 3 i 50 • Q= • • • 26 gpm 60 Top • • • • • • 70 of screen 175 ft B • • • • 4 80 Pump inlet 195 ft • • 1 10 TIME (MIN) 100 w.B timp.obb BY 61.1,2014 BALLEAU GROUNDWATER, INC. EFTA01124862 ZORRO RANCH WELLFIELD 0 FIGURE 3 WELL 6 TEST HYDROGRAPH 20 40 60 ii. 80 '4 100 O i— Pump on 24 gpm Temporary loss of power 120 ill O 140 160 - Top of screen - 180 \ Reduce rate to 18 Pump off 200 gpm 22-May 23-May DATE 24-May 2S-May ...46bet211.4•40144.0 BY 6/6/1014 BALLEAU GROUNDWATER, INC. EFTA01124863 ZORRO RANCH WELLFIELD FIGURE 4 WELL 6 RECOVERY E 0 10 20 40 so 60 Theis Recovery a w = 18 gpm As = 7 ft • • 1 10 TIME (MIN) 100 1000 valthne221.4sv20144th BY 06#014 BALLEAU GROUNDWATER, INC. EFTA01124864 WELL RECORD Settles R.GENERAL INFORMATION wino nil 'JEFFREY EMTE c/o ZCRRC RANCH ° (A) Oneia Well No Sin« or Post Offra.Addnen 1.•01, SOX 567 Cary as State ::Tarr NV._ B4O56 Well am tiled ender Parent Nar E4302 and k legated ra the: _åfa. ---24_.S.Lxof hake 20 Township 1254 Rust. 9E N.N I'M. h. Tract No 0111110 stake 4. Lot Na of Wor.ft No. wear M tibeCconsty soshdhiriow recopied ill G R. fat, Ya fret Dll Ozedbate System Uwe Y the Gnat. 000•13304 Milt.1.1•10 (B) Drabs Cawiramtet Amms r. 0. 8ox 84 treaty, (>7056 Drabrer Ratan °Yin/ 94 Completed 09/29/94 Elevation o( land author or Completed wen la 3 ciao. Outman. bpi bob Lazar No '1; 47 Rower Sae aka 12' In. al well k 1L Total depth of well 215 ft. Depth to nms woe caepkt PC on of Wan tL &Like 2. PRINCIPAL WATER-SEARING STRATA Depth fa Fed llamas Ye Feet Deacripthoe of Water-beetne Forsakes Unmated livid Woos per m lank) From Te 96 113 17 Ya.t.on 1: swe 172 198 26 0114103, 40 CW _._ Sect« 3. RECORD OF CASING Dada Dean) TM* pet loos Threads Pas al- DelitA In Feet Leas* Dort/ Type of Shoe PetforatIone Toray Roam From To 6^ PVC 0 -4 215 215 motet 100 120 0 215 215 'tot, 175 215 (awns "Su) Section 4. RECORD OF ~DING AND CE0D4TDIG Depth I Fat Mete Meseta. facks of Mad Cubic Feet of Cement )4cthod of Plumed En To kaki% 5. ?LUGGING RECORD /trains Coatuctor Addres. ?tsp.* Method Date Wed Matti rainibt enrand SON Engager Repreelatatlyt No. Depth 1. Feel Cates Fort or Cmacat Tow Bottom 1 2 4 FOR USE OF STATE ENGINEER ONLY Data RooN•red Fie No Child aR ESL Loads No EFTA01124865 3 3 TOP SOIL 3 cy 93 BOULOTIIII 96 113 17 Irmo 113 172 riv non etAr 172 198 26 C.Ptisvtl. r•ro-dvc, S' 7. 198 215 17 7 GOAT CLAY tattoo 7. REAM ItX.1 AND ADDITIONAL IN)1OILIIATION The lidotteset• busby °Miran that. to the tan of his koomtiodge and belief, th feNeelas a • tan ••• coma mord of the alson Ottaltted bolt Dales DESTRUCTIONS: This Iona sbcsaM G ••••••tel is trIpDtatt, pratersitty typrorto to, sod luhemItIc4 Co as mpplopristo dab** office of she Stith Easunory. AG a:Awes, cAcept Section S. sun in allintiO a• COmptettly aad wan* as parable fl ee In *WIN mated, tt thol. or csrpose• Tata this loon is tine ks eloss••• otos AN. st.s ....4••••••••• • p.02 EFTA01124866 Permit No. E-6478-$ I. Name of Tater Right Owner Mailing address City and State Mr. Jeffrey Epstein, Zorro Ranch PO Box 567 Stanley. lid 87056 2. Permit is for supolementpl irs11 from shallow (supplemental well, change location of well) (artesian or shallow) ground water. 3. Description of well. Located in the hIE 5i SW 34 SCI I4. of Sec.VTwo.j2L4 Rge.9Syug.o.m., w Tree, No._ of Map No. of the District' total depth...212_1nm is well carsed.S_-• outside diameter of top casing (or hole, if uncased),thinebes; if &aegi s., i s well equipped with gate wain n/a date drilled 9-23 to 9-29 19 94 Name of driller Dennisson Oril I moo 4. Record of Pumping Test, if made (to be supplied by person or rum sang test); Name and address of person mainsteat Zorro Ranch ang Dennisson Drilling personnel dare of test 1-26 to 1-30 )y 95 • depth to eta before was. Ja ke, bel ow land surface, (above, below) and pumping level during test. 198 length of test. 48 bows; average discharte 3° G.P.M.; specific capacity of well. 0.446th-fain. per foot of drawdono. Pimping test data submitted with application to appropriate E-6478 5. Pentane* Pump Equipment: (a) Description of pump: Make Jacuzzi : Type 158542510-52 size of discharge •5 inches; if iwbine type, gin size of colts , lathes; diameter of bowls inches; number of talk • length of suction pipe fete; total kerb of column, bowls sod suction pipe ,leer if centrifugal type, give size of pump itches: if other type, describe rated capacity of pump (if known). 30 G.P.M., rev. Pet aria., from • depth of 213 feet. (b) Description power plant, mike New 1ex Elect •pype Single phase, 120V rated horsepower (if available); type of drive connection to pump (direct. gearhead, or belt) (c) Actual c6schatge of 30 G.P.M., Sr_ rev. per min., from • depth of 188 feu; Dem a test 1-26 CO 1-3D 19 93 6. If reservoir is used, give approximate size: length nia her width • depth 7. U above well replaced an old well to be plugged or abandoned, fill on the following: the well abandoned is located in the n/a %of Sec. TwP. Rge. Describe plugging method Name of plugging contactor 8. Tell Record filed with State Engineer's Office, Yes (as c:5902) (Tea or No) of Glorieta Geoscience, Inc., agent for the apegIc 1. sue Rutte, Consultant, affirm that the foregoing statements are rate to the best of intow end belief and that I MO the agent for Oflel sod holder of said water right. 33 (sole, partial, agent for, etc.,) - P Jeffrer Epsr p, Zo/ro Ranch Petaittee S -0 OW i ar 1u2 -61 0 STATEMENT OF STATE ENGINEER'S REPRESENTATIVE I hereby certify that I have inspected the above well and find it constructed in accordance with the conditions of the permit. Note any exceptions Accepted for filing without benefit of field check by State Engineer Office personnel. Well was ',Iodating gots seism a head of (measured) (estimated) Old well has been (plugged) (copped) (retained for other sights) feet at By. Robert D. Thompson Title: Water Resource Specialist Date. March 14. 1997 EFTA01124867 PERFORMANCE CURVES 40 GPM MODEL 40S FLOW RANGE: 24 - 55 GPM 1900 HEAD (FEET OUTLET SIZE: 2 " NPT 5 10 15 20 25 30 35 CAPACITY (GPM) SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE. 4' MOTOR STANDARD, 1.10 HP/3450 RPM. 6' MOTOR STANDARD.15Q0 HP/3450 RPM. ' Also available with 6' motor. 40 45 NOMINAL DIA. 4" 50 55 Performance conforms to ISO 9906. 1999 (E) Annex A Minimum submergence is 5 feet. CRILINICtrCbS 4-21 EFTA01124868 MODEL 40S 40 GPM TECHNICAL DATA DIMENSIONS AND WEIGHTS MODEL NO. FIG. HP MOTOR SIZE DISCH. SIZE DIMENSIONS IN INCHES APPROX. SHIP WT. A B C D E 40510-3 A 1 4" 2" NPT 24.6 11.8 12.8 3.8 3.9 32 40515-5 A 1 1/2 4" 2" NPT 29.7 13.6 16.1 3.8 3.9 37 40520-7 A 2 4" 2" NPT 34.5 15.1 19.4 3.8 3.9 41 40530-9 A 3 4" 2" NPT 43.3 20.6 22.7 3.8 3.9 65 40550-12 A 5 4" 2" NPT 51.3 23.6 27.7 3.8 3.9 78 40550-15 A 5 4" 2" NPT 56.2 23.6 32.6 3.8 3.9 84 40575-21' A 7 1/2 4" 2" NPT 74.6 29.6 45.0 3.8 3.9 120 40575-25' A 7 1/2 4" 2" NPT 81.2 29.6 51.6 3.8 3.9 124 405100-30' A 10 4" 2" NPT 103.7 43.9 59.8 3.8 3.9 181 405150-37DS A 15 6" 2" NPT 99.5 28.0 71.5 5.4 5.4 244 405150-44DS A 15 6" 2" NPT 111.0 28.0 83.0 5.4 5.4 340 405200-SODS" B 20 6" Z' MPT 136.0 30.6 105.4 5.4 5.5 319 405200-58DS" B 20 6" 2" MPT 149.2 30.6 118.6 5.4 5.5 334 405200-66DS" B 20 6" 2" MPT 162.4 30.6 131.8 5.4 5.5 394 NOTES: All models suitable for use in 4" wells, unless otherwise noted. Weights include pump end with motor in lbs. • Also available with 6" motor. • Built into sleeve 2" MPT discharge, 6" min. well dia. MATERIALS OF CONSTRUCTION COMPONENT CYLINDRICAL SHAFT (3-44 Stgs.) DEEP SET (50-66 Stgs.) Check Valve Housing 304 Stainless Steel 304 Stainless Steel Check Valve 304 Stainless Steel 304 Stainless Steel Diffuser Chamber 304 Stainless Steel 304 Stainless Steel Impeller 304 Stainless Steel 304 Stainless Steel Suction Interconnector 304 Stainless Steel 304 Stainless Steel Inlet Screen 304 Stainless Steel 304 Stainless Steel Pump Shaft 431 Stainless Steel 431 Stainless Steel Straps 304 Stainless Steel 304 Stainless Steel Cable Guard 304 Stainless Steel 304 Stainless Steel Priming Inducer 304 Stainless Steel 304 Stainless Steel Coupling 316/431 Stainless Steel " 329/416 Stainless Steel Check Valve Seat NBRI316 Stainless Steel NBR/316 Stainless Steel Top Bearing NBRI316 Stainless Steel NBR/316 Stainless Steel Impeller Seal Ring NBRI316 Stainless Steel NBR/316 Stainless Steel Intermediate Bearings NBR/316 Stainless Steel NBR/316 Stainless Steel Shaft Washer LCP (Vectra®) LCP (Vectra®) Split Cone 304 Stainless Steel 304 Stainless Steel Split Cone Nut 304 Stainless Steel 304 Stainless Steel Sleeve Not Required 316 Stainless Steel Sleeve Flange Not Required 304 Stainless Steel NOTES: Specifications are subject to change without notice. Vectra® is a registered trademark of Hoechast Celanese Corporation. 'Stainless Steel option available. Fig. A E 2" • A C BOB De' Fig. B 4-22 TN, CR LIN °PCPS EFTA01124869 ) WATI,R ITC-NOLOGItS eVO UA CERTIFICATE OF ANALYSIS Analysis NO : 101909 Job ID : J[2014MAY15]32319 Zorro Ranch 49 Zorro Ranch Rd. Stanley, NM 87056 ATTN: Eric Carriaga-EWT ANALYTICAL LABORATORY 4669 SHEPHERD TRAIL ROCKFORD, IL 61103.1294 Branch Org. Code : 020 Sampled Received Completed Purpose Supply/Source Sample Point Description TELEPHONE 815.877-3041 FACSIMILE 816.921.8166 Page 1 of 1 05/02/2014 05/15/2014 06/03/2014 Presale Activity PrivateNVell(Deep) Well #6 Raw Water CATIONS RESULT UNITS ANIONS RESULT UNITS Calcium (Ca) 130 mg/1 CaCO3 Barb (HCO3) 157.0 mg/I CaCO3 Magnesium (Mg) 51.8 mg/lCaCO3 Fluoride (F) 1.04 mg/I CaCO3 Sodium (Na) 28.7 mg/I CaCO3 Chloride (CI) 24.0 mg/I CaCO3 Potassium (K) 2.5 mg/lCaCO3 Bromide (Br) 0.104 mg4 CaCO3 Iron (Fe) <0.002 mgA Nitrate (NO3) 18.0 mg/I CaCO3 Manganese (Mn) <0.001 mg/I Phosphate (PO4) <0.080 mg/I CaCO3 Aluminum (A0 <0.005 mg/I Sulfate (SO4) 16.4 mg/1 CaCO3 Barium (Ba) 0.159 mg/I Silica (SO2) 18.4 mglICaCO3 Strontium (Sr) 0.742 mg/1 Copper (Cu) <0.002 mgA Zinc (Zn) <0.002 mg/i OTHER PARAMETERS RESULT UNITS RESULT UNITS pH 7.94 Total Hardness 181.80 mg/I CaCO3 Turbidity 0.05 NTU TOC (C) 0.25 mg/I Conductivity 421 uS Free (CO2) (1) 4.1 mg/I CaCO3 The reported results are representative of the sample as received. OUR REPRESENTATIVE IN YOUR AREA IS: Evoqua Water Technologies LLC/Albuquerque 3800 Rutledge Rd NE, Ste A Albuquerque, NM 87109 505-344-8250 Fax 505-345-5937 [I] Derived from Alkalinity and pH ANALYZED BY: Jackie Benzel EFTA01124870