ML20126J131

Forwards Trip Rept Re Visit to Site & Assessment of Public Health Impact of Failed Mill Tailings Dam in Nm.Monitoring Repts Encl

ML20126J131
Person / Time
Issue date:	03/11/1977
From:	Resner E NRC OFFICE OF STATE PROGRAMS (OSP)
To:	Kerr G NRC OFFICE OF STATE PROGRAMS (OSP)
Shared Package
ML19211B053	List: ML19211B052 ML19211B557 ML19211B558 ML19270H995 ML20126J068 ML20126J073 ML20126J077 ML20126J082 ML20126J088 ML20126J097 ML20126J099 ML20126J105 ML20126J110 ML20126J113 ML20126J120 ML20126J131 ML20126J140 ML20126J145 ML20126J149 ML20126J154 ML20126J157 ML20126J161 ML20126J165 ML20126J169 ML20126J173 ML20126J178 ML20126J182 ML20126J187 ML20126J190 ML20126J196 ML20126J202 ML20126J209 ML20126J214 ML20126J219 ML20126J223
References
FOIA-81-8, REF-WM-28 NUDOCS 8104230719
Download: ML20126J131 (86)

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i 4 .i...r, a M040RANDUM FOR:.G. Wayne Kerr, Assistant Director. . for State Agreements Program G,; _ z. ..l h .,.7;;'.r.,?A,fficeofStatePrograms ...,, '.r.,l';....N:,;. : ,{ .~, ..,;,...e y. g'y : 2,. s 4 ( '5UBJECT: AS..SSMENT OF THE PUBLIC HEALTH IMPACT OF THE FAILED U '. MILL TAILINES DAM - UNITED NUCLEAR - IMES ~ s PARTMERS MILL, GRANTS, NEW MEXICO a 1 Attached is the report of the visit to the subject site and an assessment of the impact on the public health resulting from the ' - + das failure. c .r. c,. l ,e,. i ~.< ? y ,v ..c ;g 1:

• Ernest P. Resner l

s State Agreements Program Office of State Programs

Enclosure:

.u. l As stated - ^' - i i \\ cc: R. G. Ryan w/ attachment 5 i 'A I e 81042,307/9

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.s j.' ASSESSMENT OF PUBLIC HEALTH IMPACT 4 OF THE F AILED j MILL TAILINGS DAM.-UNITED NUCLEAR HOMESPAKE PARTNERS MILL, GEITS, kEW HEXICO a 1 i Sumarv As part of the Office of State Programs continuing cvarsight of uranium j mill operations and mill tailings piles in the agreemant States, a representative of the Office of State Progrcms visited the United Nuclear--Homestake Partners Mill site in Grants, New Mexico and the offices of the New Mexico Environmental Improvement Agency during the period February 1-2,1977 to assess the public health impact resulting.frcm a tailings pond failure and to coordinate the visit of NRC representatives from the Office of Standards Development and Nuclear Reactor Regulation. The representatives of the Office of Standards Development and Nuclear Reactor Regulation visited the site to review the causative factors which led to the failing of the dam and the engineering details of the repair effort. The names and affiliations of the NRC representatives are attached as Appendix A. Based on the onsite inspection of the involved arns, discussion < with company and consultant personnel, State representatives, and the review of i documented information, it is concluded that there has been no adverse l impa:t on the public health and safety as a result of the dam failure. Comrents on a technical quality of the reconstruction effort of the dam I I will be made by the representatives of SD and NRR. It appears that the State has taken timely and effective action to protect the public health j and safety and to require appropriate corrective action by the licensee. i I The failure occurrad at approximately 5:00 a.m. on February 5,\\1977 and l resulted frc.: a combination of mechanical failure, operator error, and The failed inadequate management of the water levels in the tailings pond. i 1 I dam encompasses an area of 64 acres with walls built of tailing sands The dam break approximately 70 feet high at the point of the failure. The dam was originally occurred in the south wall of the west pond. Ovar a constructed in 1957 and consisted of a 10 feet high earthern berm. 19-year operating period, it has been raised to a height of 70 to 80 feet with tailings sands. At the time of the dam failure, the tailings pond contained approximately 10 million tons of slimes and solid materials and l approximately 2 - 8 million gallons of water. Exact estimat:s of the water levels were not possible due to icing of the pond surface. i 1 I The spill reicssed approximately 50,000 tons of slimes and solids and approximately 2 - 8 million gallons of water over approximstely a 60 acre Because of extremely cold weather, the solids and slices did r:ot area. move rapidly and the ccrpany was able to construct an emergency berm to i i i b'$$ I n

n ...~.- 'l r e ).- i contain the spill of all released solids, slimes and liquids on the company property. There were no offsite releases of radioactive materials. j Attached as Appendix B is a map showing the extent of the release. At the time of the visit, cican-up and repair operations were well underway and approximately 20% of the contaminated ground had been scraped up to a depth of 6 to 12 inches and transported to the site of an old and dry tailings pile on the company property. Attached as Appendix C is a map showing the areas adjacent to the dam break. There areas are identified as l areas A, B, C, and D. Area A was the area covered by liquids, area B was the area covered by slimes, area C was covered by sands and slimes, area D was also covered with sand and slimes. The cleanup operations had scraped area A clean to a depth of six to twelve inches. The deepest penetration of liquids into the soil had been determined to be twelve inches. The material removed from area A was being placed on the old tailings pile. ] The company estimates that areas A, B, and C will be cleaned up by June 1, 1977. Company officials were reluctant to set a date for completion of the i cleanup of area D. It is our understanding that the State will require the company to complete the cleanup of area D on a timely bases. 9 The company has retained the International Engineering Company of San Francisco to assist in the cleanup and for the reconstruction of the dam. j This company has constructed a temporary coffer dam and is repairing the g main dam at the present. The estimated cost of the cleanup and repair is t expected to be in the order of $1,000,000. Mill operations, under strict operating provisions by thc State, have been restarted and tailings are now being pumped to the west side of the tailings pond. The west side is separated by a dike from the main pond area. The State has had personnel in almost constant attendance during the clean-up and repair operations and to monitor the current mill operations. On-i site and offsite well water scmpling is in progress nnd an offsite air sampling program is being implemented. To date, there has been no indica-tion of an adverse impact on the public health and safety. Potable water has, for a considerable time, been trucked in to residents in the area, not because of radiological problems, but because of high mineral content, in particular, selenium in shallow groundwaters. A groundwater protection plan agreement between the New Mexico Environ-mental Inprovement Agency (MMEIA) and the United Nuclear--Homestake Partners was executed on August 18, 1976. This agreement obligates the company to construct a line of collection and recharge wells south and west of the tailings pond. The purpose of the system is to achieve, through flushing and dilution, a reduction in the selenium levels and other undesirable constituents arising from seepage from the pond into shallow grcundwaters. It should be noted that a State representative met the NRC representatives prior to departure for the site and reviewed the area maps taken by the i 2-s----- m. I

u._a........m__...,_,__..__,_,__., --.c.~ .= A. ~ U.S. EPA 'at the request of the State. Following this preliminary review, the group departed for the mill site. -At the mill' site, senior company management and supervisory personnel and the Chief Engineer of'the consult-ant firm briefed the NRC representatives as to how the incident occurred, the actions taken by company and consultant personnel, the current progress on repair and cleanup, and the engineering details of the reconstruction work on the dam. This was followed by a visit to the area of _ the break and direct observation of the failed portion of the dam and surround _ing area. Upon return to the mill site, a question and answer period was held. Company officials as well as the engineering consultant were noted to be cooperative and willing to provide answers to questions asked by the NRC . representatives. A visit to the Sohio Mill, recently licensed by the State, was also made. The housekeeping and cleanliness at the Schio Mill was immensely superior to the United Nuclear--Homestake Partners Mill.

Background

t The operation was originally licensed in the name of the Homestake--Sapin Partners on March 21', 1957 and subsequently amended to extend the term of the license for one-year periods on 11/18/57,12/01/58, and 03/02/59. The file contains a letter dated 06/29/61 from the Acting Director of Regulation-to Homestake--Sapin Partners stating that routine urinalyses for uranium are not necessary and were no longer being required. The letter stated that air sampling was now being required to be conducted on a routine basis during mill operations. A letter dated 01/09/62 regarding renewal of the license requested additional suppcrting information from the company including the following: "Where retention systems such as levies, dikes, ponds, etc., are used to prevent the release of liquid or solid waste containing radioactive material to offsita areas, describe and submit an analysis of-the retention capabilities and integrity of the system, conditions which might lead to accidental releases, the environmental effect of such a release, and an outline of the inspection and maintenance program designed to prevent such an accidental occurrence." l The licensee replied on 07/31/62 and responded only sketchily to the ques-tions asked. The license was amended on 07/05/63 to extend the expiration date to 06/30/66 and again on 09/06/66 to extend the expiration date to 08/31/67. It was amended on 12/09/68 to change the name to the current name of United Nuclear--Homestake Partners. On August 18, 1968, a letter was sent to the company pointing out that the original application had been filed over 10 years ago and that a complete new application will be re-quired prior to renewal. The renewal was issued on 02/08/71 for a five-year term. New Mexico became an Agreement State on 04/03/74 with an ef-i fective date of 05/01/74. The company's current application for renewal of their license was rejected by the State as being inadequate and the ccmpany . 7 N 968% __ MM M.- WWSM h-4.gM m. hese q m 4 e m

v m has' been given until May 1977 to prepare and submit an adequate applica-tion. It also our understanding that the State may require the company to cease' the use of tailings' ponds constructed of sands and to require the construction of a new retention system composed, at a minimum, of compacted earth. An onsite radiation safety analysis conducted in July of 1963 by a license reviewer stated, in regard to the tailings pond, that: "Both solid and liquid wastes are totally contained at the site except for liquids which may be lost through seepage. Since the land around - i the site is virtually flat, the tailings retert'on system was initial-ly constructed by erecting an earthern dam approximately 10 feet high, and enclosing' a rectangular area 2',200 feet by 1,500 feet (approximately 76 acres). Tailing slurry is pumped to perimeter of the system where i a sand-slime liquid separation is made by use of truck mounted cyclones. The coarse sands are discharged onto the earthern dam thus gradually increasing its' height while the fines fractions (slimes) and the liquids flow towards the center of the retention system for contain-ment and recycling of the water. Due to heavy evaporation and the recycling, the total quantity of stored liquids in the retention system is small (approximately 2,000,000 gallons). In support of his appli. cation for a license renewal, the licensee has . submitted a detailed description and analysis of the retention capa-bility and structural integrity of the system. This description included drawings of the layout, heights, top widths, side slopes, and so forth. This information has been evaluated by the engineering staff of the Fuel Processing Branch and appears satisfactory. In order to evaluate the possible environmental effects of seepage, the licensee has built a series of four wells topographically and geologically below the retention system and monitors them on a periodic basis for radium-226, thorium-230, and natural uranium. The well nearest the retention system is sampled quarterly and the others are sampled on a semi-annual basis. This program appears satisfactory." The company's compliance history over the years has been less than satis-factory. It should be noted an initial inspection, conducted in 1959 noted health and safety deficiencies. These deficiencies continued on and off up until the time the license was transfered to the State. Clear inspections l were noted in 1964,1965, and 1969 by the AEC. The inspection conducted in 1971 again noted noncompliance including some health and ' safety items. A clear inspection was conducted in 1973 (the last one by AEC). The last inspection conducted by the State was made in August 1976 and again indicated a number of. noncompliance items. i 4 1 l i ""~ ~

. ~ _ _ + .m i Incident ' Deta il s ~ Thel incident occurred sometimeibetween 4:00 and 5:00 a.m. on Saturday, February 5, 1977. In appears that when the third shift came on duty on February 4,1977, the shift foreman and a tailings pond operator were warned by the previous shift personnel that the. slimes' being pumped from the north cyclone truck were in danger of running over the bank, and in fact, some had already done so. The north cyclone truck was located on the ' north end of the east side of the the tailings pond. The tailings pond operator then went to the top of the dam to shovel sand up on the dam to t hold back the slimes. At 1:00 a.m., the cyclone truck was moved forward a short distance. Reportedly, the shift foreman and the tailings pond. operator.were maintaining close observation on the pond levels. At 4:30 a.m., the tailings pond operrMr reported to the iNreman that operations should be shifted to the' south. side cyclone truck. The foreman then sent the operator to check the south. truck to see if fresh water was being discharged, inasmuch as fresh water is used to pump the~ discharge line free - of solids when a tailings discharge line has been shut down for any period of. time...It should also be noted that clean water is pumped continuously through the lines to prevent freezing in the winter months. At this point in time, shift personnel noted some trouble with a pump in the south discharge line pumping station due to a sand lock. It took approximately .l 40 minutes to free the pump. A subsequent examination of the pump revealed thers was a one-inch by three-inch hole in the conson side of the the two l compartment pump thus allowing slurry from the north side pump to enter the south side discharge compartment. According to the shift foreman, he checked to see that the obstruction had been cleared. -The operator was then sent to the south side cyclone truck to see if everything was working properly. On her way, she noticed that a section of the dam appeared to be wet and reportedly, she returned immediately to the pump house to tell the foreman. By this time, slurry.had been started through the south pump and discharge system. The operator and the foreman then drove to the south side of the dam and found a large flow of tailings flowing down the bank of the dam and crossing the company's road around the pond. The operator then went to the south cyclone truck and found that the discharge hose was pulsating, but that no slurry was reaching the cyclone. While this was happening, the foreman called the General Operations Foreman (G0F). The review of the telephone' log showed that the call was made at 6:00 a.m. It was later learned that the Dresser coupling on the hose had separated thus allowing the high pressure discharge from the hose to cut into the dam. According to the G0F, he instructed the Shift Foreman (SF) to shut the mill down. He then called the Assistant Metallurgical Superintendant (AMS), the Operations Foreman (0F) and the Labor Foreman (LF). The LF then called in members of the labor crew, The G0F arrived at the site at approximately 6:20 a.m. and drove to the tailings dcm to assess the damage. Finally realizing that a major incident was oc' curring, he returned to the mill and - =~~- - - ~ - - - --, I' ~ - ~ - -.

_h. - ' i ~ s. ) w ordered heavy equipment such.as front end loaders to start constructing an emergency berm to contain the slimes, sands and water on company property. The equipment arrived at the site at approximately 7:00 a.m. and started building the earthern dam south of the old inactive tailings pile. A map - of this. area is attached as Appendix 8. The G0F then returned to the dam break and found slurry still discharging out of the end of the pipe where lthe Dresser coupling had separated. -He then returned to the mill and ' instituted an emergency shutdom. It appears that the tailings pumps were actually shutdown at approximately 7:30 a.m. The plant General Manager 1 i (PGM) was notified of the incident at approximately 7:10 a.m. by the AMS. The AMS informed the PGM that a break in the dam had occurred about 5:00 a.m., that water and slimes were flowing out of the embayment, and that he. was constructing emergency dikes to contain the spill on company prcperty. The PGM arrived at the plant around 7:25 a.m., went directly to the site of the break, and noted that the breach in the dam was now approximately 200 - feet across the top and formed a V cut almost to ground level. He ordered up more heavy equipment such as dozers and loaders to push up a big pile of sands to try to cut off the flow through the break. 4 State and Company Actions The State maintains a field office in the Grants area currently staffed by-two professionals. One person is assigned full-time to mill operations and the other assigns 50% of his time to mill operations and 50% of his time to environmental considerations in the Grants area. Additionally, two ad-ditional professionals have been devoting essentially full-time to the incident. Significant input of professional time was also provided by the Radiation Control Jection Program Manager and the Chief of the Occupational Health and Radiation Protection Division. The State first became aware of the incident upon re::eipt of a call from the company attorney on February 5,1977. The resident inspector became aware of the incident on the morning of February 7,1977. He immediately verified the occurrence of the incident with his supervision in Santa Fe. He then went directly to the mill site arriving at approximately 9:00 a.m. He took eight photographs and reviewed with the PGti the probable causes of the incident and tne courses of action to be taken by the licensee to correct the situation. He then contacted his supervision and gave them an l oral report. According to the State inspector, he considered the treak in the dam structure to be substantial. He was able to see the V-shaped breach from a distance of approximately 2 miles away while still enroute to the site. He estimated that the height of the dam at this point to be about 70 feet with i the width of the breach to be approximately 250 feet across extending approximately 300 to 350 feet through the dike to the pond area. At that time, it appeared that the flow out of the pond was in the order of 50 to ' 1 l

x -s l s l t 75 gallons per minute. An area up to 60 acres appeared' to have been. inundated... Company officials at. that time estimated a loss of material (liquid and solid) from the pond to be about 150,000 tons.. This figure I supposedly included approximately 5 to 8 million gallons of water. The flow of liquid continued until February 17, 1977 authough at a much lower - rate. The inspector's onsite appraisal of the situation indicated that all of the ' ) - liquid effluent had been contained on the company property by the newly constructed berm (four feet high). The greatest amount of water was noted standing between the old tailings pile and the active pile and along the area where the liquid '(general area of the decant. ditch.not slimes) reached toe of the dam and the There was one the property line. The inspector noted emergency repair operations underway and environmental samples being collected by company personnel. State personnel from the Water Quality Section of NMElA recommended that samples be obtained frou the wells of the first row of residents in the nearcst housing area. Analyses were to be made for 50", Na, Se, Mo, Ra226, and Ra22e. These samples were collected on February 8,19//. Results will be forwarded to s the Office of State Programs. prior to the spill, Ra226 levels in well waters had average 30 pCi/1 and 400 pCi/1 in unrestricted and restricted L areas, respectively. On February 8,1977, the Chief of the Design and Construction Section of the State's Engineers Office surveyed the dam site. His opinion was that the dam had not failed but had been washed out from the top and that the west section of the pond was -till stable and useable. The State inspector met with the PGM and with the Aetallurgical Superintendant (MS) and asked: c 1. How long will it take to repair the breach so as to completely i stop the loss of pond material. 2. How long would it take to be totally repaired? l How long would it take to complete the cleanup operation? 3. i 4. How much top soil vill be removed and where will it be placed? 5. How much material actual., aeft the confines of the pond? 6. What are the plans for operating again? 7. Will the company perform a tailings dam stability analysis? f At this meeting, the State inspector furnished the company officials with a copy of NRC Regulatory Guide 3.11. " Design Stability of Embankment Reten- [ tion Systems for Uranium Mills. $ l . _ = n -.. _ I r

r m \\ 'On February 11',1977 following a meeting with NMEIA officials and company representatives, an Order was. issued which required: ~ 1.' The company shall cease discharge of slurry into the east portion i of the tailings pile until further approval by this Agency. l 2. Intentional drainage of radioactive liquids from the eroded dike areas shall be into the west pond as soon as possible or into some other confined area. 3. The company shall submit to the Agency by February 22,1977, an outline of its plan and time scales for early recovery of the - liquid slimes and sand spilled. This operation must be accomplished 1 as soon as practicable. j 1 4. The company shall submit to the Agency by March 1,1977, an out-line of its plans and times scales for repair of the Tailings Dam break.. A stability analysis of the structure, when completed, shall be submitted within 90 days. g 5. The company shall submit to the Agency by April 10,1977, a I report of the cleanup operations conducted by it, including a sampling program for surrounding wells under the company's control' and plans for any additional and appropriate cleanup or monitoring. 6. The company shall submit to the Agency, as part of its license renewal application, emergency control measures in case of a similar break on each side of the tailings pile. q i 7. The company may discharge tailing into the west end of the teil-ings pond pursuant to the conditions submitted by the company attached hereto, i ~ 8. If any spillage or other indication of structural weakness of the west pond are observed or if the provisions of the attachment are not met, the company will cease discharge pursuant to normal, non-emergency, procedures to the west end of the tailings pond upon the Agency's request. Upon cease of discharge pursuant to this paragraph, the Agency and the company shall meet in attempt to resolve the difficulties which resulted in the Agency's request to cease discharge. The company shall not be required to cease 1 dischMe for a period of more than 10 days pursuant to this paragraph. 9. If the information submitted by the company is found inadequate by the Agency, the parties shall meet as quickly as possible to attempt to resolve any dispute and any required inform 5 tion shall be submitted within a reasonable time. l-lm g L r I - ~ m ar se.m* -~' _ g u o gr augu.a. W g. gym.semyggesympo.ou-o. +, -+>a

__-.._o._..__-----.------ ~ r The conditions refered to in the order resulted from the recommendations of l the State Engineer's Office and were as follows: 1. Maintain a free board of at least five feet at all times, free board being the vertical distance between the water surface and the embankment crest. 2. Maintain a beach of at least 50 feet at all times between the water surface and the embankment crest. i 3. Maintain the water level at the tailings pond west cell within plus or minus 0.5 foot of that now existing. It was the opinion of the State Engineer's Office that the condition of the west cell was adequate for the storage of tailings subject to the above restrictions. The State inspector visited the site on February 11, 1977 and noted that there appeared to be an error or a misrepresentation regarding the water levels on the west pond. The inspector immediately contacted his super-visor. His supervisor immediately came to the site and verified that the company had not adhered to the half-foot water level restriction. At a subsequent meeting, the above criteria was modified inasmuch as the half-foot level restriction did.not permit enough water for an decanting and recycling of the water system. The Order of February ll, 1977 was then modified to incorporate the new operating criteria. In response to the NMEIA Order of February 11, 1977 and amended on 2/17/77, the company submitted a cleanup and repair schedule, confirmed a 24-hour surveillance of the pond crest and tailing discharge line was being initiated and that additional personnel had been assigned to do this, changed the Dresser couplings to Naylor quik-lock couplings on the discharge hoses, instructed the plant pertonnel to immediately initiate an emergency plan shutdown at any time sernus errosion of the dikes occurred or water levels are noted to be excessive in the ponds. It also stated that new instructions were being prepared for plant personnel, alarm systems were being installed on the pumps of discharge lines. The repair schedule to be followed by the International Engineering Company of San Francisco was noted to be as follows: 1. Eliminate all flow of water into the washout gulley by pumping from the pond behind a temporary coffer dam. 2. Install a permanent concrete plug at the upstream end of the steel pipe in the bottom of the gulley. 1 9- ,- - ~

m 3.. Construct work dikes out from the toe and perpendicular to the crest of the main damable sides of the gulley. 4. Remove all slimes and soft or loose soil' from the foundation at the down stream toe of the gulley, 5. Place a stabilizing layer of cican rock-fill in the foundation-- a the depth of the rock-fill layer to be dependent upon the consistency of the foundation and the depth of the excavation. The rock-fill S to be placed in lif_ts with maximum thickness no greater than two feet. 6. A gravel drain to be placed on top of the rock-fill stabilizing layer.. The material should be placed in lifts with thicknesses 4 no greater than 15 inches. The drain thickness to be at least 3 feet. 7. Material from a suitable borrow area to be placed on top of the . gravel drain. The material to be free draining, if possible, and placed in 12 inch layers and compacted. 8. A's the. stabilizing toe berm and buttress fill is being constructed at the down stream end of the washout, foundation cleanup work in the gulley is to be extended upstream toward the axis of the main i i retaining dike. This work will. require the removal of portions of the temporary coffer dam. 9. For the final " closure" between the temporary coffer dam and the buttress fill it may be necessary to use dump rock-fill.

10. All material in the buttress fill and the w'ashout plug will be placed in layers no greater than 12 inches and will be compacted by a bulldozer.

'11. The extent of the overlap of the buttress fill on each side of the washout to be determined at a later date by the engineer. 'The proposed repair schedule was noted to be as follows: 1. By two days--eliminate flow into the gulley. 2. By three days--the concrete plug to be installed in the lower pipe. ] 3. By eight days--rock-f'ill to be piaced in the toe. 4. By ten days--the' gravel drain to be implaced. 10 '- i 4 - - - - - - -. -. ~ ~. ~ ~ -.

l s 5. By thirteen days--the buttress fill is to be in place and enn-i struction of the rock-fill closure complete. 6. By seventeen days--the buttress overlap to be completed. y At the time of the NRC visit, item four was in progress. j Additional actions of the State were to request assistance in obtaining aerial photos of the area. Copies of these photos, which were taken by the USEPA, are being obtained for OSP files. Additionally, the State has sent letters to all mill operators in the State informing them of the incident and requesting, as appropriate, for specific j mill operations, the following infornation: 1. An analyses of the potential hazards to the public health and safety and property damage associated with a break in the dam in which liquid, slimes and associated eroded sands that are impounded by the dam are released. 2. A description of existing and planned measures and systems which would prevent the released materials from leaving your property. 3. A description of existing and planned measures and systems which i; will prevent failure of the dam by washout due to a break in the slurry line. a 4. A description of the cleanup and reclamation of the area affected by such a failure. j It was noted that licensees were required to reply within 30 days. It was .j also noted that the State is obtaining reports at weekly intervals frcm the licensee regarding the water levels in the west pond area including information on the extent of the beach area. An example of the weekly report is attachcd as Appendix C. Environmental Aspects The housing areas adjacent to the mill appear, for the most part, to be ( composed of trailers and/or weather beaten shacks and houses. The area is j without a central water supply system or central serverage system. Wells on the property of the residents in the area tap the relatively shallow aquifer in the Chinle Formation. These aquifers have been contaminated with undesirable minerals and chemical radicals presumably from the mill operation. The selenuim content in this aquifer has been the nost significant factor in not using well water for potable purposes. The mill operators truck in potable water for the area residents. 1 l -

= _ _ _ 'l ..v........~=- , ~. 3 l 'he areas adjacent to the mill site appear to be_ devoid of vegetable gardens " truck farms. Vegetation is the areas appears to consist predominately 'i sage brush. During the tour through the area meat and milk producing olmals were not seen. ~ P c mill, over the years, has a history of poor housekeeping. Seepage 'enm the pond area has been allowed to dry although the mill operators claim ht the seepage is collected and p mped back into the pond area. '.y insult to the environment resulting from the tailings spill would be !ifficult to differentiate from the environmental. insult that has resulted i - rom 19 years of mill operations. 'illl Licensing In New Mexico "ciar to acceptance of a formal application for authorization to operate a anium mill, the staffs of the applicant and the Agency meet to ensure %st all necessary information will be included in the application. The mplicant is provided with information describing the licensing procedure, trious regulatory guides, and other material that indicates acceptable .: sign and operating procedures. "e application must include data relevant to employee and public health ! d safety and environmental impact. State and Federal Agencies are 'wited by letter to review and comment on the application. The review is i

ardinated with State personnel in the Air Quality, Water Quality, and

. lid Waste Divisions. f Ilotice is published in various newspapers in the State which invites cments from the public.

.rrently, the status of uranium mill operations in New Mexico in that in f

. -e 3 years since New Mexico bec'ame an NRC agreement state one new mill s' 'DHIO) has been licensed, three operating mills and the onD plant are . esently in the license renW process, and another new"Riill application 'nited Nuclear Churchrock) is undergoing final evaluation. An application Sr a new IX plant has been received recently. Mill applications from at ist five companies (Phillips, Gulf, Ranchers, Exxon, and Conoco) are cected within the next two years. About 12 requests for mill license 311 cation information packages have been received from various engineering d consulting firms which indicates additional license activity in the

ar future in New Mexico.

• present, the i;MEIA has included the following license condition on the

/vly licensed SOHIO mill operation: " Approved waste ge'nerating processes and mill tailings management practices may be subject to revision in accordance with the conclu-sions of the final generic envirornental impact statement presently 12 - l 1 3 -. - - \\ 1

3 being prepared by the U.S. Nuclear Regulatory Commission (refer to the Federal Register, 41 FR 22430, June 3,1976) and any related rule making." j This same license condition will be included in any future licenses issued by the lNEIA. Since the other uranium mill companies (now operating or l expected to operate in the near future) have applied for either a license j renewal or a new license, all uranium mill operations in the State will be subject to the above condition'in the near future. New Mexico is also concerned with the structural integrity of tailings dams. The NRC presently requires applicants to provide extensive analysis to demonstrate that proposed tailings dams meets certain structural criteria. It is the intent of the fMEIA radiation licensing section to also adopt this practice. Since the NMEIA does not at present have the necessary expertise in the area of structural dynamics to evaluate such an l analysis it is exploring the possibility of either (1) retaining a j consultant (2) obtaining assistance from the State Engineer Office or (3) obtaining assistance from NRC. A New Mexico mill inspection consists of a tour of the facility (including I the tailings area), independently measuring radioactivity at various loca-tions within the mill and at its boundary, checking the company's radiation monitoring and effluent control equipment, a thorough examination of the .j company's employee radiation dose records and effluent monitoring data (including independent radiological computations as a check on the company's radiological dose calculations), and a conference with the company's manage-ment. The inspection is followed up by a letter to management listing items of nor. compliance to which the company must respond within a specified period of time describing its corrective actions. The corrective action program is evaluated by the NMEIA staff and cor.munication continues between the N"EIA staff and the company until the noncompliance items are corrected. If the company refuses corrective action or does not carry out the cor-rective action program in a timely manner, the case is brought before the Environmental Improvement Board for enforcement proceedings. The actual inspection of a mill requires several days with several NMEIA staff members participating in the inspection. The preparation for an inspection and the resulting follow-up activities generally requires several weeks of staff time with the possibility of more time required if problems are encountered. It should be pointed out that each mill conducts periodic radiological surveys at various locations within and at the f acility's boundary for the purposes of assessing employee radiation dose and verifying that effluents to the environment are less than maximum permissible concentrations in eir l l and water as specified in the NMEIA Radiation Protection Regulations, l _ _ - _ - . ~..

4 a I 3 1 Records of these surveys are examined by the NMEIA staff during inspections and the accuracy of the surveys checked by making independent samples. t!RC Assistance The Office of State Programs has, with the assistance of the FPFB, provided two weeks of on-the-job training for one NMEIA staff member, one week of training in uranium mill licensing and inspection for two additional INEIA members, and technical assistance on the review of applications for licenses for uranium mill Itcenses. Additionally, the OSP has, with the assistance of IE made arrangements for technical support in the analyses of onsite and offsite environmental samples at the United Nuclear Homestake Partners mill following the recent failure of the tailings pond dam. Ernest Resner Senior Agreement State Specialist j State Agreements Program Office of State Programs s -= __

._._.4__.......-.,.__...-_--...:._...~.......,,, z. x, -i, ) 4. Appendix A List of Attendees NMEIA: A. Topp T. Buhl UN-HP: P. M. Price, Plant General Maanger E. Kennedy, Environmental Coordinator R. Madsen, Mechanical Engineer J. Jones, Mill Metallurgical Supt. Dr. E. S. Smith, In,t. Engineering Corp. . ) i NRC: 4 L. Beratan - SD I J. Chen - SD I 1 L. Heller - DSE T. Johnson - DSE J'. Kane - DSE E. Resner - OSP e f i 1 o D -, + - n-r ,-A

i .,,_,,,.,.e.--- t s. 3 ? DECANT. TOWER Date. 2/25/77 Top of Concrete s ' h< j\\ i i i 30" A recoved 2/22/77 j. i 9 removed 2/22/77 5/_ Water Limit s ~ l I s l m)W 4'm' Water Level i i 1* g t 4 t WEST POND BEACH AREAS l i 6' t Freeboard o ', .. o Stakes / i i 3 /. j i 4j l \\ Decent 2 6 O< 0 -bo j Tower ) 1 y y t s ~ Q 3 9 6 4 i 1 1_ sp* s y -.5

., m / )' % v: s'U eve:%s ea C:*co st49 PO Bs.2951 48018a:#m Scape moac 4 E ' ' A urlC RESOURCES ~; saay A'cuswe Le 'Je* '/e.1: S?'90 A :.Le he "Je A '/e..:s 6T110 lg ** f Te eenone 5:5 m 42: November 7, 1979 Mr. Cubla Clayton Bureau Chief HM ENVIRONMENTAL IMPROVEMENT DIVISION P. 0. Box 968 Santa Fe, NM 87503 Subj ect : - NECR TAILlNGS IMPOUNDMEN.T

Dear Mr. Clayton:

To ensure compliance with NMEID letters dated October 23 and October 31, 1979, and the NRC Order dated October 26, 1979, the following documents are forwarded for the week of l operation October 27th through November 3rd, 1979 1. Sergent, Hauskins r, Beckwith weekly report to the New Mexico State Enfineer. I 2. Aerial photograph of the tallings impoundment area taken October 27, 1979 3 Summary sheet of the freeboard levels in the northern and southern cells and the borrow pit area. 4. Analysis of water samples from two monitoring wells. 5 Daily inspection sheets for starter. dam, north and i south cross dikes. I The detailed water budget for the pit is not included in this report as your letter of October 31st was not received until November 2nd. Cleanup operations in the arroyo and the Rio Puerco are continuing. $1ncerely, y+, H. J. Abbtss, P.E. Vice President Environmental and Safety Services

7lt $ERGENT,HAUSKINS & BECKWITH co~.v6ti~...6 . ~, o u ~ =.,, e ~ i,.., ~ c c a. . ~ ...u. n,~,... .~.i~siai~... 6... ~ t 's 3 ,u... ...t ce. ,..........,...,s. W ........... ~,,. 1 November 6, 1979 SHB Job No. E79-1096 J ftate of New Mexico Natural Resources Departtent Water Resources Division Bataan Memorial Building Santa Fe, New Mexico 87503 A ttention: Mr. S. E. Reynolds State Engineer Re: Church Rock Tailings Dam Church Rock, New Mexico Gentlemen: Transmitted herewith are (1) liquid surface elevations of the north, central and southern cells as well as the borrow pit, (2) readings on the piezometers installed in the north-ern and southern cross dikes, (3) horizontal and vertical measurements on the survey monuments installed in the northern and southern cross dikes and the starter dam, and (4) readings on the Hall Hydrostatic Pressure Cell Piezo-meters (HPC-7 's) installed on the downstream side of the existing starter dam. These data are for the week ending November 3, 1979. REPLY Tot 2821 G1RARD BLVD.. N E ALSUCUERCUE. NEW MEXICO 67107

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POND LIQUID SURFACE ELEVATIONS I DATE NORTH POND-CENTRAL POND SOUTHERN' POND BORROW PIT 09/06/79 6956'.4 6954.4 6953.4 6953.1 09/13/79 09/20/79 6955.8 6954.0 6952.7-09/24/79 6955.6 6954.0~ 6952.7 10/01/79 6955.3 6953.7 6952.5 6952.2 10/08/79 10/11/79 6955.0' 6954.6 6952.2 10/17/79 6954.6 6953.4 6951.9 10/21/79-6954.6 6953.1 6951.8 10/23/79 6954.6 6953.9 6951.3 10/24/79 6954.6 6953.5 6951.5 10/25/79 6954.7 6953.4. 6951.4 10/26/79 6954.7 6953.8 6951.7 10/27/79 6954.6 6955.0 6951.6 10/28/79 6954.6 6954.0 6951.6 10/29/79 6954.6 6954.3 6951.6 10/30/79 6954.5 6954.4 6951.7 6939.2 10/31/79 6954.5 6954'.8 6951.6 6939.6 11/01/79 6954.5 6954.7 6951.6 6939.9 11/02/79 6954.5 6955.2 6951.6 6940.5 11/03/79 6954.4 6955.5 6951.5 6940.7 I w

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+ OPEN WELL PIEZOMETER READINGS I PIEZO!ETER PIADINGS* .s DATE SP-1 SP-2 SP-2A SP-3 NP-1-- NP 07/18/79 12'0" 17'0" 10'0" 10 '.0" 10'0" 10/09/79 11'8" 9'9" 14'3" 10/12/79 11'8" 9'9" 12'2" 14'3" 11'8" 10/20/79 11'8" 9'9" 12'2" 14'3" 11'8" 10/22/79 10'3" 10'3" 10'0" 15'0" 13'6" 10/26/79 11'8" 9 ' " 9'4" 9'9" 12'9" 10/29/79 12'5" 9'9" 10'7" 9'9" 13'5" 20'4" 11/02/79 12'5" 10'2" 11'2" 9'6" 13'5" 20'4" Depth to liquid from ground surface Destroyed - reinstalled 10/12/79 i e e a 7 SERGENT.HAUSKINS & BECKNITH d t c.

l.' 0Q On f associates, Inc. ChgihCGAS CIEChhEAS 79064 November 6,1979 1 United Nuclear Corporation Real Estate and Facilities Division 4801 Indian School Road Albuquerque, New Mexico 87108 ATTN: Robert G patterson i. Gentlemen: 7 Enclosed herein are the most recent results of the monitoring survey for the tailings dam at United Nuclear Corporation's Church Rock Mill site. This data contains results from mnnitoring run number 5. The tabulated data pro-vides slope distance and vertical mecsurements to 29 monitoring stations placed on the existing tailings dam and cross dikes. Distances are taken frc five primary control monuments in the dam vicinity. Section A of this report contains a tabulation of slope distances measured by field survey, Section B contains a tabulation of relative distance change from the base reference at run number 2, and Section C contains a tabulation of elevation data. Elevations contained herein are based on spirit level measurements from known bench marks. Accuracy of elevations is plus or minus three hundredths (c0.03 of a foot. Distances shown herein are taken from electronic distance meter measuremen ts. Run numbers 1 and 3 have distance accuracies of plus or minus four hundredths (c0.04) of a foot. All other runs have distance accuracies o plus or minus three hundredths ( 0.03) of a foot. '~ The monitoring survey is set up to allow for periodic remeasurement of distan and elevation data. A remeasurement cycle can be completed in approximately three (3) days. We believe that the monitoring survey will be ' sufficient to measure any movement of the dam. i Sincerely, SCANLON a ASC TATES 71NC. Ar. Cli rd E. Anderson New Mexico p.E. & L.S. #6472 cc: Sergent, Hauskins & Beckwith U.N.C. Church Rock Mill

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s.v.;Ib :4. 6 t8 * ' " ' p;5. gg.,,c.H 5tafiON " M " .l. 3 N O. 1: 0$ , y ' :-- s d - e o u.4 eso. 1 2 3 4 5 HP-3 05 HP-3808 HP-3606A HP-3308A ' gytedReutif, Tg 8-1G-79 ,9-18-79 10-20-79 10-27-79 11_;_79 T:ut 4:00 P.N. 12:00 P.M. 3:30 P.M. 2:30 P.M. x u. 5.42' 4.63' 4.63' 4.63' wEATHta P.cidy.5-15 n r.Wm.0-10

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S g yp, 6990.72 6990.72 PRESS. 6990.72 6900' 60 ppm 68 ppm ' ' CC A R. l l+ SLOPE DIST. SLOPE OtST. SLOPE DIST. SLOPE Of ST. SL OPE OtST. SL OPE DIST. St 2054.627 2cs4.eso

• 0*

l: 2150.228 MCNITOR STA. "I" HAS EEIN LC Se 1353.27 1353.278 1353.298 1353.309 $9 1453.46 1453.494 1453.527 1453.527 1571.90 1571.923 1571.943 1571.933 Sto SI: 1706.91 1706.932 1706.945 1706.942 1853.37 1853.415 1853.465 1853.481 l' S i2 2096.810 2096.816 2096.807 "A" I I I l I q l l l l l I I l i

• ?40 f.'.E ASUR EMENT einen e
• eene esame em

e s :,, : u a r6.o. a e..c6 c s c t,.,; q, es e. csoug, no arno .g. AUN NO. 1 2 3 4 5 ^ INSTRuuCNT HP-3605 HP-3508 IIP-3505 HP-3808A HP-3808A 5fE 8-16-79 9-18-79 10-20-79 10-27-79 11.-2-79 T NAE 11:00 pg 3:30 PM 11:30 AM 1:00 PM 1:30 P.M. H.u. 5.33' 4.58' 4.58' 4.58' 4.58' wE ATHCR C1,Wm,0-5 21,Wm 0-15 C1dy 20-45 78 F 57 F 48' 1Eup. FRESS. 6996.27 6960' 6996' 6996.27 6996.27 71 ppm 60 ppm 60 pom CCRR. l SLOPE DIST. SLOPE 0:5T. SLOPE OtST.' SLCPE 0: 5T. SLOPC 015T. $L OPE 015T. a a 1580.233 1580.202 1580.234 1580.223 p NI 1332.96 1332.966 1332.966 1332.978 N2 1286.52 1286.523 1286.520 1286.527 N3 1281.70 1281.687 1281.701 1291.69? 1306.56 1306.565 13C6.577 1306.572 N4 NS 1362.64 1362.648 1362.658 1362.657 sos 1290.10 1290.092 1290.078 1290.086 1290.097 l 502 1203.63 1203.639 1203.636 1203.649 1203.653 503 1052.72 1052.698 1052.666 1052.635 1052.635 I 5c4 933.96 933.958 933.952 933.968 933.966 SDS 849.14 849.129 849.094 849.114 849.;19 N0l 1183.95 1183.925 1183.922 1183.937 1193,944 NO2 1099.10 1099.086 1099.068 1099.106 1099.096 NO3 935.91 935.904 935.898 935.921 933.896 933.892 933.903 933.901 a o-I i e 1 l l l 1 I l l l l

• NO M E ASUREuCNT

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_3fE 8-15-79 9-18-79 10-20-79 10-26-79 11-2-79 R I 8:20 AM 2:30 PM 1:15PM 10:45 AM 9:15 AM I y pag H.M. 5.55' 4.76' 4.76' 4.76' 4.76' I l WEATHER P.ain 0-5' ci, Wmo-10 C1dy 20-45 cl., 5-15 cl. 0-5 I 0 0 TEuP. 64 F 78 F 60 t 60 F 40*F PRESS. 7007.76 6980 7008' 7007.76 7 007.76 { CCMR. i 6980 60 ppm 67 ppm 56 ppm SLCPE OlST. SLOPE DIST. SLOPE O!ST. SLOPE DisT. S L C PE Ot ST. SLOPE 0:5T. "N" 934.01 934.011 933.996 934.016 934.009 l NI 1229.77 1229.761 1229.750 1229.755 N2 1061.80 1061.802 1061.801 1061.787 'N3 914.26 914.250 914.237 914.252 ~~~~ N4 788.76 788.729 788.712 788.737 N5 700.87 700.835 700,842 700.e44 ns 661.92 661.875 661.881 661.891 NT 683.22 683.191 683.194 683.208 N8 757.38 757.347 757.345 757.363 N9 758.32 758.289 758.292 758.302 Nio 761.83 761.800 761.804 761.815 Nil 817.52 817.498 817.502 817.507 g Ni2 861.14 861.120 861.119 861.121 l N13 918.35 918.335 918.333 918.347 Nid 977.68 977.672 977.678 977.695 Ni5 1032.75 1032.741 1032.744 1032.753 ~ Nts 1C68.29 1068.282 1C68.283 1068.297 l ' sol 1286.04 1286.044 1286.006 1286.022 1286.014 S32 1256.80 1256.308 1256.784 1256.803 1256.793 s03 1249.18 1249.167 1249.084 1249.066 1249.072 SO4 1283.33 1283.270 1283.270 1283.289 1283.275 505 1351.29 1351.283 1351.250 1351.259 1351.269 not Eo9.03 689.000 628.996 688.993 689.002 l N32 598.30 598.257 598.252 598.258 598.266 l NO3 428.34 428.277 428.276 428.270 4;g,;g4 l "P" 1032.86 1032.911 1032.882 1032.909 1032.907 l I i l l - \\ l l l =- 1 l I l __ i -- I e NO MEASUREMENT a e . m -i

i .....t. t lg... 'h ' '_ _ '. p~, aw. t.p ut. m e o r"* ,,g7,,.m T mia " P " ,. ~,, =- RUN 40. 1 2 3 4 5 1 l*sST Rut K H T _ HP-3805 HP-3308 HP-350EA

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) { 7:ut 8:00 AM 1:15: FM 11:00 AM 12:30 PM _ l H. M. 5.41' 4.37' 4.37' 4:37' WEATHER Pt C1dy0-5 ci,WM 0-5 0 43*F TEup. 70 F _76 F PRESS. 7048.26 "J020 7048.26' 7048.26 i CCRR. 72 ppa 57 ppm SLOPE DIST. Store 067. SLCPE DIST. SL CPE DI ST. St.CPE OtST. SL OPE DIST. _i "N" 1580.495 1500.498 1580.495 L N6 1509.61 1509.554 1509.553 1509.557 Nr 1399.13 1399.075 1399.071 1399.079 Na 1308.77 1308.721 1308.730 1308.724 [ I y, 1142.25 1142.196 1142.198 3347,195 NiO 959.64 959.552 959.556 959.554 Ns 786.06 785.950 785.963 785.953 l Nt2 703.83 703.712 703.722 703.718 Ni3 631.16 631.029 631s035 631.027 Ntd 561.86 561.711 561.732 561.725 Ni$ 492.50 492.325 492.336 492.335 nis 412.50 412.296 412.310 412.312 1033.229 1033.22 1033.228

• o" I

I i 'l I I 1 I' l l e i, 1 l 1 _L ]

• NO utASUREMENT

9 e n i. r c-1 I (.. t SECTION B Relative Distance Change l l s.

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• uN tio.

I 2 3 4 5 6 ~' ^ 8-16-79 9-18-79 10-20 79 10-27-79 11-1-79 -( MTg _ MONITOR BASE L D. REFERENCg R EL ATlVC CHANGE 1 Pit.a.'B E R orStuJ "O" 4012.272 -0.002 +0.009 58 1491.460 +0 021 +o,o73 39 1308.081 +0.018 +0.042 t S10 1130.135 -0.025 +0.042 s11 960.648 +0.018 +0.046 S12 _ 807.554 +0.025 e.009 "M" 2096.941 -0.001 -0.014 t 8 I I 4 t I I I I I I I I I l l l l l l

• NO MEASUREMENT TAKEN l

46

• PLUS INDICATES D!Si#JCE AWAY F EM 1.NSTRU?. TENT LOCATICN. M:NUS INDICAT E S DISTANCE TCWA: !

A-INSTRUMENT LOCATICN. [ h l l- ~ r I

y p;';;fC3 5'AI,"*J RELt.!'.'s c n !.',E LouTIIN.f. Wick f ' a r,: a et %.:.654. 4 tactt, oc ap.:sta:vt. hu. stus R** T iTAM "M" ma mL ; worrr. .-ur _.aw .,...s , u... w --2 _

• *.! N 40.

I 2 3 4 5 6 .~ ..,a, t.T _ 8-16 9-18-79' - 10-2C 10-27-79 11-2-79 .4 v:mion EASE L D. REF ERENCE -

n.

• R EL ATjVE CHANGE j

ygv3ER DISTA!JG l 2054.627 FIT +0.023 "O= "I=-- 2150.228 McNITCP STA. "I" HA s EIIN LOST +0.020 +0.031 58 1353.278 59' 1453.494 +0.033 +0.033 j +0.020 +0.010 S10 1571.923-S11 1706.932 +0.013 +0.010 +0.05.0 +0.066 S12 1853.415 aA" 2096.810 +0.006 -0.003 f: i i e 1 4 ~ 1 i f l l t ~ g 3 l l l l i I l 'l l l [ h 1 I I F M No ME A.5UREMENT TAKEN

• PLUS I!iOICATES 0:5TA.'.0E AWAY FFCu !! STRUMENT LOCATICN. MINUS INOICAT ES OrSTANCE TCWA INSTRUuENT LOCATION.

i k P i i-f

i , ;:e, o u o s.ia c.e:t t. =t M'.N iCR S

• Allo 4 E E' A';*'I Cha*0E t.odi$CN bd a6tvoutsout. ES 87'83 IN51RJMENT STATICN "N"

.lCS NO. 75754 =:

==r_.- A U!d NO. 1 -7 3 4 S' 5 ojag 8-16-79 9-18 79 10-2C-79 10-27-79 11-2-79 1. Nj,TCM Ryg R E L A T'l V E CHANGE ct y, fiUY3gn DISTANE "P" 1580.233 -0.031 +0.001 -0.010 N1-1332.966 O.000 +0.012 N2 1286.523 -0.003 +0.004 f N3 1281.687 +0.014 +0.005 j, N4 1306,565 +0.012 +o,007 N5 1362.648 +0.010 +0.009 'SD1 1290.092 -0.014 -0.006 +0.005 SD2 1203.639 -0.003 +0.010- +0.014 SD3 1052.698 -0.032 -0.063 -0.063 i l 504 933.958 -0.006 +0.010 +o, cog SDS 849.129 -0 035 -0.015 _o,olo l ND1 1183.925 -0.003 +0.012 +o,019 ND2 1099.086 +0.002 +0.020

1. o,ogo ND3 935.904

-0.006 +o,o17 "Oa 933.896 -0.004 +0.007 +0.005 j l l l t I t l l l l l I I I l i I I i ~ I i l l l l l I l

• NO MEASUREMENT TAKEN
• PLUS !!C: CATES C! STANCE AWAY FROM inSTRt;v5NT LCCATICN. M:NUS INDICATES OtSTANCE TCwaa (NSTRUMENT LOCATION.

O. e

t j [g..{7)g,{,.U,'.'. i e . y, .y I sec s et *6ptu. a c ect s, og 1.* * *;.1CM 5 ATC.*; RELA!!vE Chat:GE so a N a . n e m. * * "" ' ' " mSau.en statics "o"

u., _ w.s.

-x--. - -,. ~ ~, _ n.,._._ 2 U *4 90. I 2 3 4 5 6 a .,tT E.,n,-- =8-15-79 9-18-79 10-20-79 10-27 11-2-79 s. n u0tilTCM BASE-l L D. RD EAENCE R EL ATlYE CHANGE 4: fag,3JR O!STAN2 "Na 934.011 -0.015 +0.005 __.. _ -o 002 L' N1 1229.761 -0.011 -0.006 l N2, 1061.802 -0.001 -0.015 l N3 914.250 -0.013 +0.002 l-N4 788.729 -0.017 +0.008 l-NS 700.835 +0.007 +0.009 l N6 661.875 +0.006 +0.016 N7 683.191 +0.003 +0.017 l NO 757.347 +0.002 +0.016 l N9 758.289 +0.003 +0.013 N10 761.800 +0.004 +0.015 Nll 817.498 +0.004 +0.009 I N12 861.120 -0.001 g .n_nn3 N13 918.335 -0.002 +0.012 l N14 977.672 +0.006 +0.023 I N15 1032.741 +0.003 +0.012 N16 1286.044 +0.001 +0.005 l SD1 1296.044 -0.038 -0.022 -n n4n i SD2 1256.808 -0.024 -0.005 -0.015 SD3 1249.167 -0.083 -0.101 -0.095 SD4 1283.270 0.000 +0.019 +0.005 SDS 1351.283 -0.033 -0.024 -0.014 ND1 689.000 -0.004 -0.007 +0.002 ND2 598.257 -0.005 +0.001 +0.009 ND3 428.277 -0.001 -0.007 +0.007 "P" 1032.911 -0.029 -U.002 -0.004 I I ; 1 I l l ll I l l l I l I i

• NO ME A%9EME.v". TAKEN 44 W PLUE WDICATES OtSTA'CE AWAY FROM tt!STRUMENT LOCATIC?L M:'!US INDICATES D:STAEE Towa i

(NSTRU'AENT LOCATION. P \\

e.r,e'r*..s:n w.a c.=c6. oc f.*?; i fA. 'a*Ci -:,:. A*.sl i,xA*;;,E ( n,,, 7 g., C,.,,.y - ' ~ ast. cut 2 0,it, wts s tuo IP451RU'/ENT STATICN .p. JCS No _IV. *;t. = n, - e.m_. AUN 'J0. I 2 3 4 5 6 i. a:T.E -< S-16-79 9-18-79 10-20-79 10-27-79 11-2-79 1 1 f.CNITCR 8 t.SE L D. REFERENCE R EL ATIVE CHANGE rau.* 3ER OtSTAst1 "N" 1580.495 +0.003 0.000 t:6 1509.554 -0.'001 +0,003 ~ N7 1399.075 -0.004 +0.004 6 N8 1308.721 +0.009 +0.003 N9 1142.196 +0.002 -0.001 N10 959.552 +0.004 +0.002 j' N11 785.950 +0.013 +0.003 l. N12 703.712 +0.010 +0.006 N13 631.029 +0.006 -0.002 N14 561.711 +0.021 +0.014 N15 492.325 +0.011 +0.010 N16 412.296 +0.014 +0.016 "0" 1033.229 -0.00G -0.001 I l I l l I i l l I I I i l l l t l l l l l W No f.tEASUREMENT TAKEN

• M PLUS INDICATES C' STANCE AWAY FTCM INSTRU'.'ENT LOCATION. M;NUS INDICATES O! STANCE T0wAF INSTRuvCNT LOCATION.

j l l l l l l

o {- !~ ) l 2 e 7 l' I. l' l I' I, 5 SECTION C Elevations O

l l l .. m

• *.%' 40.

i 2 3 4 5 's l M.7 79.__ m. "s-3-M_1.0- 2,0-79, _ 1p 27-79_g ;,g yg,, l 0 T E.,- 1 alc.A l E L E V A 7IO N I 1Q uw.thER NI 6968.967 6968.973 6968.943 6968.950 6968.947 l N2 69.260 69.266 69.230 69.240 69.230 93 68.830 68.837 68.806 68.817 68.803 67.940 67.930 44 67.960 67.964 4 69.357 69.350 N 5_ 69.360 69.373 69.359 69.347 N6 69.370 69.380 69.883 gg.p7g .N7 69.887 69.900 68.980 68.E77

f. _NA 68.990 69.000 70.403 70.406 N9 70.427 70.433 i

69.023 69.026 N io 69.047 69.060 'l 68.057 68.070 68.036 gg peg Nt1 67.603 67.610 Nt2 67.630 67.637 68.086 68.087 Nf3 68.103 68.117 68.539 ca can nl4 68.580 68.580 68.073 68.080 NIS 68.090 68.103 68.910 68.927. 68.896 68.907 NI6 Noi 68.217 l 68.201 68.146 68.160 68.146 _Np2 68.413 1 68.401 68.336 68.350 68.356 0 5 72.686 72.911 72.860 72.873 72.800 sol 68.580 68.563 68.493 68.500 68.490 502 69.960 69.926 69.866 69.870 69.867 SD3 69.160 69.116 68.976 68.986 68.980 504 67.913 67.823 67.693 67.709 67.693 9 505 IAoA9.773 6968.710 6968.636 68.650 68.647 l l 64.940 64.940 l 6964.980 64.955 58 64.516 64.514 l _19 6964.610 64.561 l 63.656 c, cso slo 6963.690 63.668 Sit Sect _ Con A4 04A 64.026 64.030 l 64.303 64.304 l 5 12 6904.417 64.348 6954.6 6954.66 6954e47 l hhdo" 6953.1 6953.71 6954.86 l l 5 ab l 6951.8 6951.81 6951.65 l l b I" l I j I i I I l k NO MCS$URCMENT Il.

l LOCATION OF MALL HYDROSTATIC PRESSURE CELLS (HPC-7) ) Location Piezen.ater Number Not Yet Installed PS-1 Not Yet Installed PS-2 PS-3 25' L of CL Sta. 13+00 PS-4 100' L of CL Sta. 13+00 PS-5 100' L of CL Sta. 19+00 25 ' L o f CL S ta. 19+00 PS-6 PS-7 25' L of.CL Sta. 24+50 PS-8 25' L of CL Sta. 30+50 25' L of CL Sta. 39+00 PS-9 PS-10 100' L of CL Sta. 45+00 PS-11 25' L of CL Sta. 45+00 PS-12 25' L of CL Sta. 50+00 PS-13 100 ' L o f CL S ta. 56+50 PS-14 100' L of CL Sta. 56+60 I y b i i P, SERGENT,HI.USKINS & BECK ~ 1 s t t-ww w w .nv %4. --.,m y,--, , - - -w r --.m--

m _. _ _.. ~ Pi i204 C*Rli...f A01.% S 34te: I-/P- ?/ l 'e 4 Console i TA:t.I::il:i Col DicdKv.D:T Ct, server: /Cl$//0 ca.4 L-. Pier.yre er _ PS-I's ..PS - _ ' E nters PS-1 PS-2 PS-3 PS-4 PS-S PS45 PS-7 PS-3 PS-9 PS PS-11 PS-12 I I ( I l Serial ~ N r. tar 22 f71 2163 l 224/7 l 2250 22 'T*l 2 2,.4 ' 2Ai 2 gaf ~20s.s 2Mi2.m mi 2071 ' 2 4 I t. I I Gauce i S-55 I 37 Q Ij

12. i j f,,

/$ / f, f? y Rc.nhir.g ( i Indicated I Pressure (PSI) IS 33 2 /*E O*I O*7

1. ~#

/' /

1. • O

/*/ r 1 3, W i ap (?S ) k '* o ! 29

f. 9

f. h l D..*/

Q*? 09

f. o 0.ey s

f. O

l. 2.

fo u 2 ? I? h Actual f { Pressara (PSI) O J.[,] O.3 d.3

0. 3 O

O. 7-0./ o.; o./ o,t

a. 3 i

g E t Pressure Cell i Elevatisc. (FT) t ()l?7S,! G S bh3.!, fqq'.g $1%r.O;&i5sd !N74 ;b959 6.l,9;,z.), iM'?.O ) 69l,,70 ; b v',5 O ~ ~' Pierocatric ]

6. '

Pressure (FT) O o.es

o. ~1 c,. ~1 j ~ 0. '?

o o.i i C. ~2.

o. L

o. :.

'? A9e./ ' 65M ' (.94 2.9 !,9i72 (,,96 2. 2 6sM r f%25.'/ }W2V.3 6.'r6 3 DIV.7 lV,3i.y Piezoraetcle M27.5 l Elevaticr.(FT) s !!ndicated Pressura = Gauge Reading x 0.06 I I l Piercinetric Pressure = Actual Pressure x 2.307 i A ? - Tuen frua Calibration Graph RitGRKS: ~ =

..e. s

_,a_

. ~.. - m ..-e.... m kl i= i +. _. i.' 1, d ,3 Igg \\. ^a. ,u ,4 4 i g 0 . 'f) .3 f 't e"

1. g

( c4 o .s. s e .. v.. 4 s o g* m \\, l 9-.

=

- t s t. I,l L. - t Ib v4 'M Q o g n n N -m n e-t~ n 4 fJ 3 + g 8 N 9 N s,% v* w M Ig aO a.J n ..J [ 4 e. 4 -.== . l e4 g p g g) d d

• /3

.N - f* Q ,Q d

• s)

3 r-v~

m co .. -s .g c. b a -o r1 M. l 2 e o N ir w 3, a = cs f*\\ b c= g g Q '4 Q G-G -a g Vm M d Q 89 J"I = C C (l C ' V'" t.Ps

== C v-2 -I 'Q. n o Q w c-r y v-m n e.9 e98 9. } k f, D

• • l l

Oi .3 t e S o a o. d ,3 z,, 'm-- - r1 4 e.. r r- 'q w >s x .e %3 u w a .d s o o 'n N.b U -3 ? x O 4 0 g = tD $w r -1 Q n Q-g f 'O y x e c4 N

• '=$

L J g, G. = aC J g

• • ai C

9 M N f gr. j oh l..

• 6

'a J, o s) n s: o o n l N > =e G. N tsJ J / s-e p= .J h 64 3 f) V= 6 d N 84 h O [ f W i Y d8 S ri O 0 3 ~ r _n__ N d 3-ss x 5 0J g 6 N C'- 6 g c1 j) N 4 N b ) 3 ' J*. Q. f4 ,3 4 1 Q wt, c. c 'o=

• O W

(j 'y w/T i*N b 4 e, l 9 (4 W ea (d: ras C m p ,O ( c. 3 e u ' b $ _v. o ~ v1 M O W r'* Q. N b d41 W 3 fJ ' )' e* v u 4 ' C"'= 3 US e W G e== 8"* s'"* ar*= 4,4 b ' e )=-

• • 'm b-eV 4

'6e i e-o v1 m m ts. t. ta. b i

1. 1 Q

513 w U 44 Ua-A i J. C g ei,. f.J ar= %.-e .e= l J 'b w ser "f3 - C L bC "tl3 b M i 9 . W dV 9J Q W G 1 W4).C e e.J es gb c.= *. ' i: M 3 m 7 3w Q3 g 4.J .gr >== W 48 vs C'l H b b b =a* @ b ,== 4a "J

• d*

e a d I Q. - g e.J .g W * **' (J W

• • 3 M

M.O vM v er) J-e4 4 j tre N 4) es= 43 ci t.3

• -- M e-=

3 i,e =4 > N M N > .,.:.,e. v w k. j ' C cq LM 3m 7W A **) 48 au d'.s *U Me e

• * =

=a d'

• • b I e

eeb b-v. b g .p. W i I ,1 +.,.. r

4' v

,r - 3 \\ o ,3 .g u;) n .f 'n 3 .k 'f )) q 't si {;' O } f 3 .:2 \\ . s. , ;. -) y s 3 !'l eI el ,.J 'i ( -<N cJ s. '+lh 4 q s-r, r.) rg Q 0 C'- ca, %*.3 . (*J w 4 Vi h Vs' - . u. h 1. (,,) N c-p"N., Q c) O. .N m o 1.,, /s i a %-1

1. 5 t

N h.

• s-W pd 4

q g g is* c. ~n s. u 4 ' a. a; ~ ao . e. o e- ~ 6 s es N g

q o

0 '.'s ~~ m- .o n o u;s. i n. D. a a 3 ,,. b e.g. u c= a .g s M9 0 6 Y2 N 4 'I 08 E N o 5 J t aJ n o ca c: ' a A a m s x ed o ? o ,y / e ~s .,a G. w g o r 7,5 41 0 0* '4 G y y y fj o s 4 4 o 33~ m 9 D-e. 't

.5 t'~

~%. p-g a u y r~ s O ek ~ N h 1. e> .a i a: a s b M D 4 h 6~ '.O s s J o so ,.n Al .a 1 O s u; Q= J. ~,. et ~ 9 ')

• =

s2 IA

y.

I ni t-us N o 4 d 4 01

u. -

t N t.% mb .3 ^ D 5 Y. \\n. D D} (o) 9 n m m e IO rq DI O f* e i o,,.t. .9'1 gg S. v N s n i o eo x i g M d W b ($ I m

• a-c D

tt b, x a s's p: = e r.) N 8 vi 03 g6 N. v= e et - 2. en e .c c o c. e= b nJ i g g u, ec a bl 3 0 A a s.s j (i{ 7/ y[ Gt's"f" m u 4J -4. T4i 3 t a

• c%t a

b d y w .a D 'e. 41 ,/ O. .%.) g W e== (' 4 3 L) b 4 2 e vp 2 W G i .e w o i ps 1 a e an n se

=

c - P=

=

7-c CL. f 4,*l b1 ,= W -F. W L 1 u 'J==* Ch U C .,V. v. ' Q.

1. U a 1

.'r f) g j = g ( -s,, e W TJ C b b s.: -3 L .v I 4a . eu 4J W i&f o u

• .)

wo e AJ .ss N es ein wb b % * *=

• u b a

e.n 4 U1 ,.U S* b =b U to a .81 in wt art -s aJ 3 e-- 3 3 4J 18 3 w eqs tf M es & i3 v1 .es aJ c e M Q Q 'u a s, a Pd 43 = J1 rJ't * ) . *** en om 3 et to >

1. 4 vt is >

.y. et g( a. L cm

o. v3 w.u es c w *.

. 9.,w. w ,o,- c: vu .Le ,m g .gg e .3 og g 9o t". % Q. aJ % b p-. ... L .Q) ' 4."*. 41 M b") M >= 4 Q %=* e4 4% Q.

• LJ

& Q. Cb ta.a w (%

• T Caf.

<l f --n,

1 '-Q) 4 I 8.)

• I g

,g g ' 0 fl E\\ e )a3 n.J '.4 0 c) 8 e 1 ..s 2 e n, 0 q -} 5"J ..a y. c= () e o Q vp 41 NJ Y sp. C I 9 D \\

• )

'1;. b f Y h ~ 90 h & YY B N O fg d N s. -R 'j t.r. v q 3 0 .v. J. i g r m n 0 c. b 3 { J ,4 9 i S' 0o -) 0, e. s y g o f o 2 u i, .v v, .a a e m ra a 1, s n a. a o 3 m i + I 3 D t d '3 /' ~.:. o r-o a n d i a. 4 { t-et s to p, r,$ .:na t's f 3 4 ~ ..a c. n .} J' i g d 9 3 h.n h 'd d d O 3 A a. n s i 1 0 o a.c) T cg ';:i M J us r r. 's 0 s 1 d o o + d j j A y N o o i.) c. . s,.

• a O

04 M 1 ('i s 4 w m w p m. o e en m a. c.'>

e. :

n .n.r o .c m s ~~~. 3 ~ c. w a 6-s 3 =. c r p3 M { c m u a> 9 o-4 in m (.*. o } 0 N m N ( N .a a a. I e c N @J, 6 N 4 3 e. v u-in. ~ ,n,. u a y. m m e .o .s e .x o x I M. w d a ~ O N .7 ..t u c ,Y. N o o x = y c4 e. .c o, m .l a. -a m m .c .a., c s, u I en n a. u }

• ?

p q'3 n.yl.S G ion ?, cc e m .e' -*=g N y q t a, u U .U O' 1 = c -s y 05 n y.LW.T. k)N ,g y ~ ec. n o m - u .a G 3 LJ u e r-o e n m m d i u .~ .~ m u 1 su a. ,t u. u m o

• • 'm=*

sJ U. U** a. Q .C J .3. .ex.,* i o m=. LJ . = *

• r=
• Di e

93 C b bC t b 4 ,o4 4 4J c ad C 6J u as u ys .q 8 6.y.e tA m m eeu % ~ (J L w. s.n ou 4 ou 73 J r= 3 '3 W f_f 3 +J erg E M 2 a== C b e*b m.c m *n G s' es .u o e a: t .o l3 e.> o ou s~ es a e .*s.a e,e g

r

,o we >

• e i,1 t a ;*

a N at 4 3 ej,9J ..i 4U GU .U. d G. .~. j e: .O G uQ 3.s1 D G t% v1 +4 4

• • J L

w-u.J c= J sp rig 1# Gb Q. s.;.b .b r. =s =.s=os i ._c g n

• 1 Q

.e sm...

t A wu n.-,.u, y ,f.,. j. M,w

Csa m.u.

6r: A t-re n : l l i/T71 Y /; : 3 4 ls .' 7 t ./ $4 / ( ) J-1 .). 3 :*

.5.2..c c : < E7.o SVo 4.o'S27 57..

j .;27 / 5/, g W.r.<c.o 5ga (44o st'7 Sgy. A .c.,.sa.s *e so n. ein p. +o'.,..ncs.s 44. 3 s!. S.st.C. 58.o. go 6.4.cf4 5t7 22 / S/.2 ; Et.4 '*4ss.o'14s..fac.594.sV7 s. .si., isi.e..<: saa sto 4.s.sv&.cas : I51 1 3.' si.7 I . 5 < sao.' ct'o < & 5.s h. .sy'.7 e l} /t .517 lSt.s ;<sao.W7 }@s:sY.c M7 f I.. .2 ;

st.4 Ji.t, ;<st e. sy.5.x 4 C'i Eds :sys ;.

t lsi.s.<spoLw7 ; 4s.s Isec !rgs i 5 ..si.s So I

• S t. 1 i 5/. % < G T.o :54.7 Wo.4 IS4.4 :sgs i 2

ist.4 i s/.4 :<ss.c%las Ngo.s : SC.4.cs. C I 3 SM - 5/.5 -<S'Ro-SS.c &S 44.4 S44- - ~ ~ -. - - 3/ / .si.7. si.s.<Eb ss.2 k4.s : s+W.srcs. C

• Sc4 i SoA-cse.o.sr.o dos Efr;5gs2

.5

.ct.: !st. 5 <a.o sge <4.r.sgr isgr.:

//c d / / . S/.5 l 54.3.cG.o 'T.9 =c4o.S SVl5" h5YS ' / i d .5/. 4 ' 5/4 <!ko Ed? <.j!c.s.rt!E '.C/T ! St.4. I s/.4 <ss.c sy4 :<Mo.s fr 1sy's, i

SA4 lf/4.<E2.o ;K3:<4s. EH'1.sr/.s*!

c'2 / st.S f/.5 452.o' E5.5 k&.4. Sjf5 lEfs ; l B .si.s !si.s.creo, c.o ;?%s: sg5 : yW. l ? / 5/.s.IS;.y2T.0,SC2>67lS$3{SY4; ? sM !st.2 ;<z.o'.Es.s 4 7 sfs isty ' 3..

st.4.] N'K <G.obA o I &.7 Tf5_$SV4 l 5

) 6., Thevarianceinsomeofthereading[g)onthesameshlftisdue 1. to inexperience on the operator's part to read the g,auges. This situation has now been rectified. 2. For correct elevations add 6900 ft, to the readings. 3 Station #4 IIquid level will rise and fall as liquids are pumped to borrow pit station #5 Therefore station #5 will show a gradual rise.

=. e ? >;qwn-nw.n mmwww; um' srs unn racc r u. 1

n-i

\\ 'Wr.LL-201 ' WELL.202 Sample . Sampling

Ideetificatlon'/ Date (11-5-79)

(1 M - N ' 4 A3uminum (mm/1) ~ Arsense (ma/1) na r f un.' - (= /1) Boron-(mm/1) _codium (mm/t) 95.8 61.9 . Chloride (ar))) Chromium (ag/1) Cobalt (og/1) ~~ 4450 e lo~C - 4700 o Ccmductivit y 6sahos/cm). 9 14 C .salindty. (pa L's per Thousand) 3 33 Cyanide (mg/1) fluoride : (em/1) - l i Iron (et/1) Lead (sm/1) N'351*f.nc/3) W8 Hanranese (me/1) holybdenum - (ag/1) Mitrogen (/umn.oois ) (ed)_) Ritrocco (Nitrate) (er./1) Nickel (er_/1) pH 750C 4.16 4.03 salenium (og/1) Si _1ve r (or/1) Sodium (nr/1) S g see' (og/1) 6293,1 7090.4 To t al~ Di ssol ved Solids (r.,p./1) 9911 3383' Total Mercury (ar/1) I.a nad him (rar/1) 2ine r (or./1) - To tal Uranium (et/1) - Radium-226 (pCi/1) PJdiuc-228 (oCi/1) . 3oriuo-730 (oC1/1) Cross Alpha (nC1/1) e.....=.... a ra u s. 11 t- +c r -f vv c - + - + r-t & -- e-.- + + - * -= w -w--d-= +-e*"'- =~r+--*~'*

'... * *,. : t -

.r*e.

• ...

.,...*i;*.,, r ;...... :. 9: ,tu:,er

• un: mascumcr s : :.

J O _.. \\ j l -.,, 9.. .. 5,....

a..:. : :...

\\ a. ---..*a .-..ss. ..... r..; ....-.+. .s e 3=, 3 5 / e. u a. f-.._...-..

f... 3.

.e,.. _-._ - e r .' '.. =. = 1 // ) 4 .: s >e_- 2 c: 0:r.i _-.e:' b : ,- 64, dA'. &(< f ' A.M.O.M/

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e a t UNC Mining and Milling NECR Tailings Impoundment Weekly Report s. November 4-10, 1979 m h '^9" W.---- M g* = 4 SP F .2 i + s 4 I e ". p w 1 + 4 g-4 4 - 0 ~.. t as 's 1 a <- 1 1 I 1 .m..

.?.., e, UnC mining AnD mlLLinG Dmsson of United Nuclear Corporebon 'PO. Box 3951 -4801 Indian School Roed. N.E. H ' A.UnC RESOURCES Comoany Altmuerows. New Monco67190 AtouquerQue, New Memco 87110 Telephone 505/265-4421 November 14, 1979 j Mr. Cubia Clayton Bureau Chief NM ENVIRONMENTAL IMPROVEMENT DIVISION 1 P. O. Box 968 Santa Fe. NM 87503

Subject:

NECR TAILINGS IMPCUNDMENT

Dear Mr. Clayton:

To ensure compliance with NMEID letter dated October 23, 1979 and October 31, 1979, and the NRC Order dated October 26, 1979, the following documents are forwarded for the week of operations November 4th through November 10th 1979 1. Sergent, HauskIns & Beckwlth weekly report to the New Mexico State Engineer. .m 2. Summary sheet of the freeboard levels In the northern and southern cells and the borrow pit area. 3. Analysis of water samples from monitoring wells 201 and 202. 4. Daily inspection sheets for starter dam, north and south cross dikes. 5. Evaporation and precipitation record. 6. Response to your letter to Mr. D. D. Turberville dated October 31, 1979 Cleanup operations in the arroyo and the Rio Puerco are continuing. Should you find it necessary to discuss item 6 at greater length, UNC Mining and M!lling personnel will be pleased to meet with you at your convenience. Sincerely N 3 ~ ~72,, 1. G. M H. J. Abbiss, P.E. ( Vice President Environmental and Safety Services Copy: Mr. Ross Scarano, NRC Dr. John NeIson ge

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, ~ I S l SERGENT, HAUSKINS & BECKWITH ...u ui... 6 4 ~...u 47,.. .n.,.. ~ j 5 ) Ams s so86 us.Hanic.. anoinssneae osocooy. wareni4La cuo =centwo (

== l a.. -u... November.14, 1979 State of New Mexico SHB Job No. E79-1096 Natural Resources Department Water Resources Division Bataan Memorial Building Santa Fe, New Mexico 87503 s" .l, A ttention Mr.'S. E. Reynolds State Engineer Re Church Rock Tailings Dam Church Rock, New Mexico Gentlemen -( Transmitted herewith are (1) liquid surface elevations of-A the north, central and southern cells as well as the borrow pit, (2) readings on the piezometers installed in the north-ern and southern cross dikes, (3) horizontal and vertical measurements on the survey monuments installed in the northern and southern cross dikes and the starter dam, and (4) readirigs on the Hall Hydrostatic Pressure Cell Piezo-meters (HPC-7's) installed on the downstream side of the existing starter dam. These data are for the week ending hovember 10, 1979. Should any questions arise concerning the attached data, please do not hesitate to call. ',0. n n,,, O. Respectfully submitted, Sergent, Hauskins & Beck, 4 g By i k, Robert D. Booth, -/ 's ,,"'"h oua""'"o' ss Copies: Addressee (1) United Nuclear Corporation (10) REPLY TO: 2321 GIRARD SLVD., N.E., AL8UQUEROUE, NEW ktXICO 87107 A LSUQUE nO.US EL P ASO TUCSON PHOGNIX (SOS) 346 6 6 (SIS) 9914188 6802) 884 9233 60023 272 4343 g. s.

1 x / POND LIQUID SURFACE ELEVATIONS f; ', \\; DATE NORTH PUND' CENTRAL POND SOUTHERN POND BORROW PIT 09/06/79 '6956.4 6954.4 6953.4 6953.1 09/13/79-09/20/79 6955.8 6954.0 6952.7 'I 09/24/71 6955.6~ 6954.0 6952.7 10/01/79 6955.3 6953.7 6952.5 6952.2 10/08/,9 10/11/79 6955.0 6954.6 6952.2 10/17/79 6954.6 6953.4 6951.9 10/21/79 6954.6 6953.1 6951.8 10/23/79 6954.6 6953.9 6951.3 -10/24/79 6954.6 6953.5 6951.5 10/25/79 6954.7 6953.4 6951.4 10 / 26 / ', ) 6954.7 6953.8 '6951.7 10/27/;) 6954.6 6955.0 6951.6 10/ 2 8/ ~. 9 6954.6 6954.0 69,51.6 10/29/;7 6954.6 6954.3 6951.6 10/30/7) 6954.5 6954.4 6951.7 6939,2 10/31/79 6954.5 6954.8 6951.6 6939.6 11/01/79 6954.5 6954.7 6951.6 6939.9 11/02/79 6954.5 6955.2 6951.6 6940.5 11/03/79 6954.4 6955.5' 6951.5 6940.7 ,,fj' 11/04/79 6954.4 6955.6 6951.5 6941.9 11/05/79 6954.4 6955.9 6951.6 6942.6 11/06/79 6954.3 6956.8 6951.5 6942.1 11/07/79 6954.3 6956.1 6951.5 6942.5 11/08/79 6954.5 6956.3 6951.6 6943.3 11/09/79 6954.4 6956.3 6951.6 6943.6 11/10/79 6954.5 6956.3 6951.6 69,43.6 -- b, & 7:?. '*a 't /j' I i SERGENT.HAUSKINS & BECKWITH ~ s 6 _.. ~ _ l .-..= n-v g <-w m-, e,- m. m 4

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• 11/05/79 12'5" 10'2" 11'2" 9'6" 13'5" 20'4"
  • 11/06/79 12'5" 10'2" 11'2" 9'6" 13'5" 20'4"
  • 11/07/79 6956.0 6956.7 6956.5 6957.0 6951.8

'6947.8

• • 11/08/79 6956.0 6956.7 6956.5 6957.0 6951.8 6947.8
  • 11/09/79 6956.0 6956.7 6956.5 6957.0 6951.8 6947.8 3
  • 11/10/79 6956.0 6956.7 6956.5 6957.0 6951.8 6947.8 1

Depth of liquid from ground surface

• • Elevation of liquid surface

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SERGENT HAUSr.ihr.t. BECKWITH jX i

g+ 6 e = I ;. [..- l~ I $01120d associai:es,inc. Eng{ NEEM GRd hGAhed f 79064 1' November 13, 1979 ~ ? f United Nuclear Corporation Real Estate and Facilities Division 4801 Indian School Road Albuquerque, New Mexico 87108 ATTN: Robert G. Patterson [ Gentlemen:. Enclosed herein are the most recent results of the monitoring survey for the ~ tailings dam at United Nuclear Corporation's Church Rock Mill site. This data contains results from monitoring run number 6. The tabulated data pro-vides slope distance and vertical measurements to 29 monitoring stations placed on the existing tailings dam and cross dikes. Distances are taken from five primary control monuments in the dam vicinity. Section A of this report contains a tabulation of slope distances measured by field survey, Section B contains a tabulation of relative distance change f.r.om the base reference,at . ( run number 2, and Section C contains a tabulation of elevation data. Elevations contained herein are based on spirit level measurements from known ~ i bench marks. Accuracy of elevations is plus or minus three hundredths ( 0.03) of a foot. Distances shown herein are taken from electronic distance meter measurements. Run numbers 1 and 3 have distance accuracies of plus or minus four hundredths (t0.04) of a foot. All other runs have distance accuracies of plus or minus three hundredths (t0.03) of a foot. ~ The monitoring survey is set up to allow for periodic remeasurement of distance and elevation data. A remeasurement cycle can be completed in approximately three (3) days. We believe that the monitoring survey will be sufficient to measure any movement of the dam. Sincerely. SCANLON A AS IAT N C. r-Clif rd. Anderson [- New Mexico P.E. & L.S.16472 cc: Sergent. Hauskins & Beckwith U.N.C. Church Rock Mill m ( ~ PLtast atsty 10: O Sassia et, setw netsco 37602 P_o. soE esrf,13o2 osaCE AW(NW TELEPMoest : Isosi 983 3323 3 assuousacus, new wsco eine soos psammvama escLE w tats **ourt isos ass-sosi O amtssia. atw waco mario s,o wtst temas tetspaows esosives.co l S >e--n-- e- -.-n-t--

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.w gg u y g g - wi $ 2g5%='f&ffdEMCQ N M)U:f%$?$@5N5Y mwd A W 4WM k hk _' hf k h _ ah h. ! _r c _o s a e w - s) Bem.h Mach UA/C D/uAtes DAM &>te: /,,M ....o- .o.. CNuecx Rocc _.,.,,,..n,.,s, .? r_ 9 9 C-i A .) t. t L C e 9 r L SECTION A u ( {} Slope Distances 4 V _,,,_,,,.A., == + +, ,g

• = + = =~ -..

e .a er, , e' 6< g y .c m t U:'.# a u 6.. 3 m e e *% *L'I *.* t'.P".=e > ~U tl C. MILLING CLIEld T .i I. PROJECT 1 AIUNGS DAu 'eooe n'n.gnvaina cancLC. at LOCATION CHUhCH ROCK, NW.) 4 '

• as,ai,aucpout, nu smo 1NSTRUMENT STATION *A" JOB NO._79064

~' 1 RUN No. 1 2 3 4 5 6 HP-3808A HP-3808A HP-3808A '57 RUtJE N T HP-3805 HP-3808 g ATE 8-16-79 9-18-79 10-20-79 10-27-79 11 1-79 11-6-79 Tiut 2:35 P.M. 10:30 AM 4:30 P.M. 5:10 P.M. 10:45 A.M. H.W. 4.99' 4.35' 4.35' 4.36' 4:36' wt ATHEn P.Cidy 055 Cir.,0-10 Cir. 0-5 c1v. 0-3 40*F 56*r 66 F i TEMP. PAESS. 7025.10 7000 7025.10 7025.10' 7025.10 f COR R. 57 ppm es e i SLOPE DIST. SLOPE DIST. SLOPE DIST. SLOPE Ot ST. St. OPE OtST. SLOPE OtST. SLOPE t "0" 4012.272 4012.270 4012.281 4012.298 sa 1491.49 1491.480 1491.501 1491.503 1491.514 Ss 1308.09 1308.081 1308.099 1308.123 1308.115 $10 1130.16 1130.135 1130.150 1130.177 1130.163 Sit 960.68 960.648 960.666 960.694 960.680 Sir 807.59 807.554 B07.579 807.563 807.588 l u" 2096.941 2096.940 2096.927 2096.945 a i I .B.Skk no P' 9 _ l F S ,1 i " thF i it 3f l.: l i-vem

1. No ME ASUREMENT

.m m. .f......,. -- CLILNT U.fi.C. uaLLING' J=e,?se  % . PROJECT' 1 AsuNGS CAW = =5 eees oce..ssvania oment. at . LOCATION CHURCH ROCK. NW .* ' ' %eseeadoest, me ame --14tS14UMENT'STAfl0N-M" JOB NO. J 064 ~ RUN'NO. 1 2 3 4 5 6 '57 8tUMEN T HP-3805 HP-3808 HP-3808A HP-3808A HP-3808A k^1TE 8-16-79 9-18-79 10-20-79 10-27-79 11-2-79 11-6-79 TIME 4:00 P.M. 12:00 P.M. 3:30 P.M* 2:30 P.M. 11:30 A.M, H.M. 5.42' 4.63' 4.63' 4.63' 4.63' wE ATHER P.C1dy.5-15 ir.wa.0-10 car. 0-3 1 720F. 48*' 60*F TEMP. PRESS. 6990.72 6900' 6990.72 6990.72 6990.72 fCORR. 68ppe 60 ppm 65 ppm SLOPE DIST. SLOPE OfST. SLOPE DIST. SLOPE DIST. - SLOPE DIST. SLOPE Of ST. SL OPE C

• (

2054.627 2054.650 Sosut.AA1 ii "s* 2150.228f MONITOR STA. "I* HAS BE'EN LOST l SB 1353.27 1353.278 1353.298 1353.307 1353.317 ' 59 1453.46 1453.494 1453.527 1453.527 1453.526 gio 1571.90 1571.923 1571.943 1571.933 1571.946 j , l ses-1706.91 1706.932 I 1706.945 1706.942 1706.944* 1 ~ ger 1853.37 1853.415 1853.465 1853.481 1853.495 g-2096.810 2096.816 2096.807 2096.812 t a L J r' 1 i. 4 i 'l r A j L 4 t p N

• NO MEASUREMENT m.

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es sveutsout..mo ****

INT >TRUMENT STATION N -

• JOS NO. 79064

_ j Ruw wo. l' 2 3 4 5 6 7'STRUuCNT HP-3805 HP-3808 HP-3805 HP-3808A HP-3808A HP-3808A . ATE-16-79 9-18-79 10-20-79 10-27-79 11-2-79 11-6-79 Tiut 11:00 AM 3:30 PM 11:30 AM 1:00 PM 1:30 P.M. 1:00 P.M. H.W. 5.33' 4.58' 4.58' 4.58' 4.58' 4.58' wtATHER C1,wn,0-5

1,We 0-15 C1dy 20-45 cir. 0-3 EuP;

'78 F 57*F 48' 60* F ' PRESS. 6996.27 6960' 6996' 6996.27 6996.27 6996.27 pA R. 71 ppa 60 ppe 60 cap 65 com SLOPE OlsT. SLOPE OfST. SLOPE DIST. SLOPE 0:57. SLOPE OtST. SLOPE DIST. SL OPE D

• ,=

1580.233 1580.202 1580.234 1580.223 1580.217 wt 1332.96 1332.966 1332.966 1332.978 1332.916 N2 1286.52 1286.523 1286.520 1286.527 1286.504 f

• N3 1281.70-1281.687 1281.701 ital 802 1281.667 1

'N4 1306.56 1306.565 1305.577 4 1306.572 1306.552 ws 1362.64 1362.648 1362.658 1362.657 1362.630 SDI 1290.10 1290.092 1290.078 1290.086 1290.097 1290.068 502 1203.63 1203.639 1203.636 1203.649 1203.653 1203.647 503' 1052.72 1052.698 1052.666 1052.635-1052.635 1052.633 { 304 933.96 933.958 933.952 933.968 933.966 933.966 SOS 849.14 849.129 849.094 849.114 849.119 849.119 r NO: 1183.95 1183.925 1183.922 1183.937 11a3.944 1183.931 -[ NO2 1099.10 1099.086 1099.088 1099.106 ' 1099.096 1099.089 ) NO3 935.91 935.904 935.898 935.921 935.909 n-a 933.896 933.892 933.903 933.901 933.903 i f I -w-i l I, t i' ma ..e...ac..e.w e .m m _m.,,..-,,.~.,,, ,, - - - ~ -. .w. ....m .s. . n!, -UrlC mining ROD mlLLinG .0. -;*e *. ..:,e,*m*F

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a unc masoumces,o-s,..,

Po tre Os .e.,r w 626in 4e6 vemorenaum

1. v N CC: Bob Bocch (SH&B)

- Dre:I: Mill Pile 02.10 D.- D.- Turberville, J. Abtnss,/-T. M. Kilrtry.. 7EM: G. A. ~.9erquist' ' Niv Tr wction - Starter Den. North & South Cross L 533. -SURE::T: WN 3rtspectial by2 Aw, A.n.a.n. A n x.,u,.a.n. ~, Check as amlicable 1. L. _ - ;c = 2. cweks 3. Setti-A yIs to YES 10 YES PC r y ~. y 41, yt,,sar m / 2. Necth cross Dike ( 3. South Cross Dike Description ars!t qualifyirs statament to each "Yes" mark: 4 = ( S A t A&W_s sbs:nVdpu. /4e nun - O ' eneral Oxtnants: G / f- ~X % % &.1 & Arm t,44-- r, s/>,s *D - bl. A Ah >, x ~ / / / , f (/ / / 4 n Id t/a /sv ds 7'" %s An,/2/ , b-, M .< M 1, Y_ q 9-b. s ^ i 4 ~ ~ ~ ~ " " + <,. -. v i r s + =*

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l \\ \\ ,UDC m ninG AnD mlLLIIIL i i, Chw*p. P.ae*Coereuo ts Ga:4 NeaMe ves8?J31 * ) O., -*~ ' *#'u:nc:a'*s* Cf"c-a.e t UnC auncmeso s, ;.a,, Po ora,oo 1.anoa. ws m4et ( urmotancum /[4 V6*f 8A [> ,CC: Bc6 Bcoth (SH&B) Mill File 2 02~10 me, D. D. ' Dart:n ville, 'J. AW ewr'T. M. Kilroy j 20: m i: G. A. Swarttuist r.sr.eetion - Staner De, nrth & Sete3 Cross Dikei g: Detly r !/ Md 1, spection Cb:'Av+=A by: % ne: Frcrn M.'/2 W.M. 'Io [I*.I 3 MMWP.M. Check as atelicable 1. See ece 2. Cracks 3. Settl= h yrs to YES to YES TC V V 1. Starter Dem 2. W 2 Cross Dike V V 4 V V V 3. south cross Dike . Descripticc. and quali.'ying statstent to each "Yes" nark: ( .2 Ge.eral R.... iJ: ( ...._.,_._,.a__ l' e t< ~ t UnC min;nG Hiiu sins: t.n n.,

.--- 8 ::. :.ee ae e :

.e u,. 4r.. E r*, -Q'/ 4 une aasousess :.:-:.r. P:: :.. ie.er.r,5:t tr;.st:- $ Itv79-C:: B:sb locrth (59i3) A- _: MEL1 File 2 C~~10 D. .. Turberv.-11e J. Abois#s, T. M. Kilrcri e ':0: TR.M: G. A. Swarquist 5m: h43v Inste--ice - Starter De n, te-th A South Cress Dikes / .f ' Inspecticr: eted by: 47* '/"4 v h b N $, AfM./P.M. Time: Trcrr. 8 A.M./P.M. // / Check as a:cliaMe .L _ Seezeoe 2. C:ecks 3. Sett16-.c,- s YIS tD YES 10 YES IC V V V .1. Starter Dan 2. Nceth Cross Dike 7 7 v 3. Scuth Cnass Dike v. 7 Descript. ice and qualifying statenent to each "Yes" nark: ' (~ O Genern1 at rw-ts: .64,r36 2 -- /co rs ,4.- el-r.. i / s / / Ah,-h! lilt cf .rG/ s s/ m 7.4*.-m / w r-t% rn a .e cf rwa mG --. - -fo %/. 1, t" t" 2 da /,e c/d .o.41 s, f c/ff e d4' Mn Q - r i i / ( 1 l

• * ~ -

- ~ ~....... c.... ge $s e 1 UGC t.. m!GC ROD fn!LLif1G .... t -: v. -

-r v.r:an.e-s

.. - w :: s - ; J ..-) g, ,une masouacas ::-:., w,-*,sa ::.e.e / XA ~/7 / .CC: Bob Bcoth (EiLB)

C

i.:

/ nill File 2102.10 D. D 7.::te.-v.11e,' J. Abbizs, T. M. Kil:ey i ":0: I '7R:24: C. A. Swa.q. list 5 1 t"T: tailv Ir.steetion - Starter M. tb -th _A South C-ors Dikes

• / erfahA !

Ir.spect.icr. Cmducted by: i .rren 9% x.n./p.n. fw /is L.n.p.n. u.-a: / Check as atelicable 1. Seecace 2. CW cP.s 3. Sm.ler ent YES to YIS 1D YIS fr i 1. Starter D=i ~ I 2. Ncrth Cross Dike v- / 3. South cross Dike r Descript.icr1 a.x$ qualifying statemmt to each "Yes" werk: M n,.da w <,-u x-. ~ aeea1 w.n.ts / / / Of n el >-f erro 60 birro ,e f- ?' -. ~ ~ - _ _. N j "e

• W m l'

g UnC rnininG RnD fnILLinC

... u... w. :. m.,.

., :..:.. c..

..:. 5:.. a.... m

-NT ~" 4 r.-- 63 *:2.Hu / 4 unc mesouncas :t-:.. - - - r: 4 ~ c: - h w 8 <sa w es~ 79 n, P4M *41e 2iC2*10 1.11e, J. P+" ss /, T. M. Kil cy g "D: D. D. 7t:berv: 7*A:24: C. A. S a:quist Dai3v Tr.seectien - Starter De. te-.h & 5 r th Cross Dikes EL: 1: 4$ m< reh M Inspecticr. Q:rsductaf by: r $,,A 1.n.a.v.. % E,i% [.v..n.v.. u: c5-ek as a =11 cable 1. Swee 2._,, Cracks 3. Settleme.t ns !D YJJ to YES N-V 1. Starter Den 2. North Crcss Dike 3. South Cross Dike Descripticri a:x5 qualifying stateme.t to each "Yes" mark: enu e . - ea ( 6 A l ) se. ' General Ccrmm:.ts: r!/6z<<f N." /"c.rr /d3 Y A W fr-f d5-d ///%, E x w it' ^ m n ses' /n A aend ,- 4 4, n4 d, Sw FX &d *W ci, 1 p, /s,, s.,o . s.r.,er, trar,, - 4,, r/A.A /?& /rrkr7.n m e

• ks e,'4x

?V:.& <lhf >**/ v A' W N ^, jf/s.&.,t* Wh '/W A*d,S / d *}D =r$ f.'fAnd I $14M! ~ M v ia,n smv~5 .-%r/ sh/n n-6,Pk. 6hr/ dais, ',si,ud m, S 1.. 9 ge l

UnC r... Ming RnD m!LLinG

.

• 1 *.* -e* ;

w * **: a :* 0 % =r* H :f"".me*o*r*: Ces a?.m *he<t.E*2?,- ..une no u.co a v .- :.s .. m =.m. t.* *~:~ts* S u" Y A/, "/'7 / .JnC: Icb Beeth (SH&B) Mill nie 2iO2*20 D. D. T.2rbe.-v13.le, J. Ahhhe/, T. M. Kil_*trf 3: W.: ..G. A. S.arriuist S&2::*I: Daily Ir.see tien - Sta:-ter Dr_m, No* th & South Wss Dikes < -/1<us<., + ! Inspecticn Cbnducted by: 8 I A.M./P.M.' TO A.M./P.M. Time: ntm Check as atelicable I. Seerece 2. C W &.s 3. Settleme-t YES 10 YES 10 YES N 1. Starter Dum 7 2. North C: mas Dike 3. Scn2th Cross D2.ke 7 Desdpt.icn and cpw14fying statement to each "Yes" nark: ( i. e We Ye ff P e/ Of*9 Y 9$ l'*1./ t* b M h O/Y9l A%P s A ' *k/b kb / $f f *" $s 7 6 i 6'ir fr~r4l t**rP f < e-lll* f. n m / (/ i,i '7 M 64. %, Ea, -as- . ' u a,, L se.e r oe., -.d - / /~ lf/m 64,aw',/ _ 6,, / eldag_21-A &M /A&ex tuet +1 e,,d a4 & x,./.Yr / / ( Su c,s/ mnM / i ,, - - - _..~,...., _ e :.,. -UnC f.sininC An3 rniLLinG f - $ r :..- -. c.

2.....- w..: o : -

f .: :, v. :m :- j ay iunc.asou.cas v->,. - +- c ?.** "*A** . r. 5 ' ".;;2:; /0A.4v~79 -0 : B::d: Ecd (EiiE) l . 2. ".:_-.as.3 11a. J. ':'. E }'.:.l. f 7 - t

l 7F:"21:

G. A. S=wxt.:ist IL r.7: des 2__smim - S*2.mer Dt, N -h & S:r.:-5 Cress Dikes 1 y,gpec.,,iar., M**=8 by': /IM/ddfi /.ma A.M./P.k.

• 2D,,

A.E /P.M. j Tirre: nut. Ched as a=elicable 1. Seetase _2 Cra9.s 3. Sett.ln -.. ys to YIS ?C YIS N" 7 l. Sta.rter Dst P r 2. North Cross Dike 3. South Cross Dike f Descriptice a 4 ' qualifying statsmarrt to e' ch "Yes" nark: a . l f i i e i. f c. i t t i + a

1. 5,- A 4

" A <+' beneral ch ns:.ts: gg,,, j,,,,,4 a,.,. <. sw M ek / 6 ' A i l / / hsJ b m.wsrrr w rst rss / p i. ) 1 .) 4 s a. >r .s m m z .r EVAPCRATICN AND wih" TOT RDTRD 7 '8 3 2 3 4 5 6 DATI- -RIAD;NO KEADING READING 1NDICATID PRECIP-TRI.*E NLM EX EVAPOE DN EVAPOR OP TAYS TJDt DA BECINNI'C /CDED ENDING EVA? ORATION J (* l 10-26 3.936 11-5 2.989 4.505 2.326 .745 3,074 .36 .192 11-12 I ? 4 1 n e ALL READINGS IE l';C*iES l -( Nethod of Calculation: F4 Indicated evaperation-1+2-3.4 $6 True evaporatier-4 + 5 = 6 I s - ~ - - -.. I s,. 1 l UnG mining RnD MILLING ~ o.v.s.on of Unned Nuctear Corporthon thuren Rock Opershons Ganup. New Mesico 87301 l g .A unc mesouness company PO. Drawer 00 heorone 509722 6651 ] Memoranoum g 1 l DME: November.12,1979 CC: T. M. Kilroy \\ 'IO: H. J. Alitiss/ 2KM: G. A. Swarquist I SUBTECT:.New Mexico Divimm=,tel Inprovernent Division letter dated octcber 31, 1979, sigmd by Mr. Ctabia C3ayten: five rarnbered items en Page 2. I i t M14=va with the items listed en Page 2 of this letter will te difficult. Each item will require serie fann of instru-mentatim, 'Ihe accuracy of this instnrnentaticn is a critical consideration. At best, under ideal conditions, We nay approach +St aggregate system accuracy. 'Ihis +-St dism,sarcf in measure-ment could be misintr.r-dted as representing seepage in' the barrev '( r pit. Recognizirs this, the design ard implementaticn of any in-stnrentatico used to meet these measurement requiremnts must be critically evaluated. In respense to the individual items listed en Page 2 of the letter: 1. 'Ibe measurement of the water discharged to the pit will have to be dene with a recording flowrater installed near the discharge of the transfer ptrap. 2. In order to measure the quantity of solids discharged, a ' rov-le gauge density neter should be installed so that the solids quantity can be calculated. m 1 r (- .s .3. "Ihe volume of water in stczege can be m1m'1=ted by r1=n4==ter measurements; inwever, the accuracy is w h te. 4. Precipitaticn measurements have been taken for the past several nrmths. has am new being kept on a weekly basis. It will be nest d4 M4m'1t, perhaps 4= - 4kl=, to have an accurate naasurernent of the total volume of fluid added to the pit. 'Ihe outline of the nn-off area is inexact. If we assume no in-filtraticn or evaporatice in this run-off area, this mman the 4-tmey of measurerxx:t. 5. Evaporatien measurements are being taken; however, ( themal differences between the ponds and the refer-ences, add potential inaccuracies to these meas u =d.s. Finally, to =1m'1=te voltmes cm 0.10 ft. incremmts, assumes a greater accuracy than we have within our present survefing carabili ties. It will be virtually inpossible to achieve this da;ree of accuracy mainly due to the irregularities of the terrain. I believe that the St figure of accuracy stated previously is extre: rely optinistic for this %=qite system. We need a good d4 =m'eeicn with our ocesultants relating to what we can do and what we cannot do. Bob Booth and perhaps, Earl B. Hall in the inst.mtien area will be of assistance in this task. Gail Billings could have sore ing in this net +x as well.. ._.. e' ; I i l I i It will be E-. ly difficult to arrive at 'a ms+=H =1= bal-ance with an acemmtable balarce that muld not be nisint-r M as seepage. 'Ib 7=f our 3roblerns, the gM system of jj sprinkling for enhancement of evaporatim must also be consider-pr J ed. With the leg landtimes of instrumentatico av=41=h414ty, .Y fl - installaticn, ancI'a break-in period, we may 6 to 8 weeks m4n47=, t approach the and of this interim cp a t.ing period. Additionally,,, the costs for such an instrtnentaticn system will not be insigni-ficant. 'Ibese could easily exceed $10,000.00. I believe it im-parative that all these issues be discussed. A W t'l =

(

I i l i I i Q I I I 6.44 ,.,g'g ka'. " ~ ~ ' ' EdNT uEC.hm - N' * ~~ ~6

• two.rtc7_1 Aiurecs oAu 6400 Pf malvsvanesa CamCLC

-*C LOCATION CHURCH ROCK. NW INSTRUMENT '5TATION'"0" JOB F40, 79064

4 4 ev*vt sovt. au 47we RUN HO.

1 2 3 4 5 6 'ST RUM E NT HP-3805 HP-3808 HP-3805 HP-3808A HP-3808A HP-380BA wATE 8 *S-79 9-18-79 10-20-79 10-26-79 11-2-79 11-6-79 Tlut 8:20 AM 2:30 PM 1:15PM 10:45 AM 9:15 AM 3,3o p,g, H.u. 5.55' 4.76' 4.76' 4.76' 4.76' 4.76' WEATHER Rain 0-5 ci, Wmo-10 cidy 20-45 C1., 5-15 cl.,0-5 cidy. 5-15 I 64*F 78 ? 60 F 60 F 40*F 57*F TEuP. i, PRESS. 7007.76 6980 7008' 7007.76 7 007.76 7007.76 l CORR. 6980 60 ppm 67 ppa - 56 ppm 63 pm 4l SLOPE DIST. SLOPE OtST. SLOPE DIST. SLOPE Ot ST. SLOPE OtET. SLOPE OtST. SLOPE C 3 "N" 934.01 934.011 933.996 934.016 934.009 934,013 ' NI 1229.77 1229.761 1229.750 1229.755 1229.771 N2 1061.80 1061.802 1061.801 1061.787 1061.801 3 N3 914.26 914.250 914.237 914.252 914.254 N4 788.76 788.729 788.712 788.737 788.732 - NS 700.87 700.835 700.842 700.844 700.839 l Ns 661.92 661.875 661.881 661.891 661.885 I N7 683.22 683,191 683.194 683.208 683.204 N8 757.38 757.347 757.345 757.363 757.357 8 N9 758.32 758.289 758.292 758.302 758.293 Nto 761.83 761.800 761.804 761.815 761.806 [ WIi 817.52 817.498 817.502 817.507 817.490 1 N t2 861.14 861.120 861.119 851.121 861.109 I Nf3 918.35 918.335 918,333 918.347 918.326 [' Ni4 977.68 977.672 977.678 977.695 977.683 b wrs 1032.75 1032.741 1032.744 1032.753 1032.745 N16 1068.29 1068.282 1068.2G3 1068.287 1068.286 I 30 1286.04 1286.044 1286.006 1286.022 1286.014 1286.026 t -- 502 1256.80 1256.808 1256.784 1256.803 1256.793 1256.816 r __ ses 1249.18 1249.167 1249.084 1 1249.066 1249.072 1249.093 504 1283.33 1283.270 1283.270 1283.289 1283.275 1283.312 s05 1351.29 1351.283 1351.250 1351.259 1351.269 1351.273 689.03 689.000 688.996 688.993 689.002 689.008 N0f NO2 598.30 598.257 598.252 598.258 598.266 598.265 NO3 428.34 428.277 428.276 428.270 428.284 428.288 j [

• P' 1032.b6 1032.911 1032.882 1032.909 1032.907 1032.90'3 L

,i s e a 1. 4 & NO WF A5UREMENT. ~........ -..-n.. 9. 'i LLILf4 4 U.fl.C. LtiLLINLs o M*8'M wb 9 s . Pes 0 JECT 4AettNGS DAM 'oeoe Pr..sswawa asett.

• LOCATION CHU*CH NOCK, NW
• **M8 " * "" "

INSTRuuCNT STATION "P" JOS NO.. 79064 RUN NO. 1 2 3 4 5 6 8'J57RuuC NT HP-3805 RP-3808 HP-3808A MP-3808A HP-3808A i. -ATE g-16-79 9-18-79 10-20-79 10-27-79 11-2-79 11-6-79 TruE 8:00 AM 1:15: PM 11:00 AM 12:30 PM 4:30 P.M. H.M. 5.41' 4.37' 4.37' 4:37' 4.37' WEATHER Pt C1dv0-5 C1,WM O-5 clav. 0-5 TEup. 70 F 76*F 0 43*F 55*F PRESS. 7048.26 7020 7048.26' 7048.26 7048.26 COR R. 72 ppa 57 ppm 63 ppe SLOPE DIST. SLOPE 015T. SLOPE 0157. SLOPE Of ST. SLOPf DST. SLOPE OtST. SLOPE t l "N" 1580.495 1580.498 1580.495 1580.492 N6 1509.61 1509.554 1509.553 1509.557 1509.561 M7 1399.13 1399.075 1399.071 1399.079 1399.082 l No 1308.77 1308.721 1308.730 1308.724 1308.735 i N, 1142.25 1142.196 1142.198 1142.195 1149 ons I NIO 959.64 959.552 959.556 959.554 959.565 [ Nil 786.06 785.950 .785.963 785.953 785.955 I I Nt2 703.83 703.712 703.722 703.718 703.721 Nf3 6]l.16 631.029 631.035 631.027 631.035 Ntd ' 561.86 561.711 561.732-561.725 561.734 Nt$ 492.50 492.325 492.336 492.335 492.330 Mis 412.50 412.296 412.310 412.312 412.311 i 1033.229 1033.22 1033.228 1033.237 ( 0". c. j -- rn,. L i L ei NMk S.res%tp. l \\ f j t l. e i s .s I i r 1 L.,.

• MO utASuREMENT

....--.u. i . ~., g e=e es ,,a 2 -2 m >a . 1 z 1 J l l,' SECTION B 1 ( } Relative Distance Change 9. -. *f % e ~' pgg 1,p $ ~ .C'd[I { r A W. ^a

• CttENT 11 N c f.unwG

% '9 ;:1.;f**"W PROJECT ~ mGs DAu $ esce Pt=4setysana CmCLC. ng 4CNITOR STATICW RELADVE CHANGE . LOCATION _Cuu*CH ROCK, N M _ -a m-tv:':vC. we s tuo INSTRUV.ENT STATION "A" JOB NCL 790M4 f l. RUN.NO. l 2 3 4 S 6 7 8-16-79 9-18-79 10-20-79 10-27-79 11-1-79 11-6-79 [ ATE p h eg N TOR R EL ATIVE CHANGE (F T.) Ntp.tBER OtSTANCE "O" 8 4012.272 -0.002 +0.009 +0.026 +0.021 +0.023 +0.034 58 1491.480 59 1308.081 +0.018 +0.042 +0.0.34 510 1130.135 -0.025 +0.042 +0. 0'N S11 960.648 +0.018 +0 046 +0.032 S12 807.554 +0.025 +0.009 +0.034. "M" 2096.941 -0.001 -0.014 +0.004 s. 9 6 .u. S su e 48 I um. J 'i W NO MEASUREMENT TAKEN

• M PLUS INDICATES DISTANCE AWAY Fr4M INSTRUMENT LOCATloft MINUS INDICATES DISTANCE TOWARD

-( INSTRUMENT LOCATION. h i ~ J 'O ttrtia i r.'j.y'. '..*.'. 'g{,'E\\T \\Yc?vng\\nG

• • g'#* M, *'*

PROJECT TAH "!CS D AM l 'soes n==setvanna cacts. og - eaQNITOR 32AfiON RELAflVE CHANGE t.0CAYlON _rHUU ROCX, NL atswoutao,.. N u. o n e fNSTRUVENT STATION "M" JOS wayn4 ~ 7i-RUN NO. I t 3 4 5 s 7 J-4TF 8-16-7e 9-18-79 10-20-79 10-27-79 11-2-79 11-6-79 '! : I. e40 NIT M i SA . L O. REFER NCE. R EL ATIVE CHANGE (F T.) i. N1.p. BER 015TANCE "0" 2054.627 REF +0.023 +0.014 "T" 2150.228 MONITOP STA. "I" HA 5 BEIN LOST +0.020 +0.031 +0.039 38 1353.278 89 1453.494 +0.033 +0.033 +0.032 ~.a 510 1571.923 +0.020 +0.010 +0.023 511^ 1706.932 +0.013 +0.010 +0.012 _.312 1853.415 ' +0.0 5.0 +0.066 +0.080 "A" 2096.810 +0.006 -0.003 +0 002 . l -r I N ![ l i ? I i(~ i I'

t..

) I I I, i. l r .l W NO MEASURFMENT TAKEW )h-

• Plug NDICATES DISTANCE AWAY FROM INSTRUMENT LOCATION. MINUS INDsCATES DISTANCE TOWARD INSTA.NENT LOCATION.

i

i I

i .i i t a .-a. ~, 1 I .. ~. 3. . CLi(MT tf M-c ?AILUNG I l *' ', ~

• rnostcT_.IArt mas ow I *.

esoa :et m'e*% vama.canets.. at

. 4CNiTOR STATION RELAffvE CHANGE WTM.UHWCH ROCK. NPs "'**d'*~"- E Ti$7?tu!JENT1 TAT 10H "M" Joe wa J rsa I. I,I e RUN NOi L 4 2 3 4 5 6 7 l ,( wE 8-16."79 9-18-79 10-20-79 10-27-79 11-2-79 11-6-79 MONITOR 8AS 1 LD. REFER NCg R EL ATIVE CHANGC (F T.) s ' - NLeMER DISTANCE ? "P" 1580.233 -0.031- +0.001 -0.010 -0.016 N1 1332.966 0.000 +0.012 -0.050 N2 1286.523 -0.003 ,o,oo4 -0.019 N3 1281.687 +0.014 +0.00s -0.020 i f j M4 1306.565 +0.012 +0.007 -0.013 NS. 1362.648 +0.010 +0,009 -0.018 sci 1290.092 -0.014 -4.006 +0.005 -0.024 ~S' 'SD2 1203.639 -0.003 +0.010 +0.014 +0.008 8D3 1052.698 -0.032 4.063'. -0.06@. -0.065 ED4 933.958 -0.006 +0.010 +0.005 +0.008 505 849.129 -0 035 -0.01g -0.019 -0.010 i 301 1183.925 -0.003 +0.012 +0.019 +0.006 ND2 1099.086 +0.002 +0.020 +0.010 +0.003 5 / +0.017 +0.005 Nc3 935.904 -0.006 so. 933.896 -0.004 +0.007 j +0.005 +0.007 7 i l ~1 i t F. L L_ '? W 'NO MEASUREMENT TAKEN

1. # PLUS INDICATES DISTANCE AWAT FROM INSTRUMENT LOCATION. MINUS INDICATES OtSTANCE TOWARD

!- ( INSTRUMENT LOCATION. I. k. i 1' . - _ ~. l -nl C. ., ;' ? _~ '...= "=-..:. ~ ~ . - = ~ ' ~ ~ * ~ ' ~ ~ p,v,,g 4 xf ::5- .a ha.w W. W. gg,gyy,,3y_ y e_,pttg,,} U

• ?

=anw=9' *% m> PM0 JECT :'d.,tIDS_Q,*g4 woes.,cwasttvaina emett.$4pt . MON 1 TOR

• STATION RELATivtIMANGE

' t.0 CAT 10Nfjd"tCM R'% NM wovouteovt, em etwo. ~0" JOS NCL Z2,0 INSTRUMENT STATION, .r m lRUN40.~ 1 2 3 4 5 6 7 h > Aft 8-15-79 9-18-79 10-20 10-27-79 11-2-79 11-6-79 ~ RE ER NCE R E L ATIVE C H A.N G E (F I) Qgg.p OtSTANCE g- "p" 934.011 -0.015 M.005- -o.002 +0.002 1.j. N1 1229.7f1 -0.011 -0.006 +0.010 ~ N2 1061.802 .-C.001 -0.015 -0.001 N3 914.250 -0.013 +0.002 +0.004 N4 788.729 -0.017 +0.008 +0.003-700.835 +0.007 +0.009 +0.004 N5 F N6 661.875 +0.006 +0.016 +0.010 N7 683.191 +0.003. +0.017 +0. 013 NO 757.347 +0.002 10.016 +0.010 N9 758.289 +0.003 +0.013 +0. 004 N10 761.800 +0.004 +0.015 +0.006 N11 817.498 +0.004 -+0.009 -0.008 l N12 561.120 -0.001 .n_nn, -0.011 N13 918.335 -0.002 +0.012 -0.009 r N14 977.672 +0.006 +0.023 +0.011 l 'N15 1032.741 +0.003 +0.012 +0 004- +0.001 +0.005- +0.004 N16 1286.044 I sol 1286.044 -0.038 -0.022 -n nin -0.018 !{ 3D2 1256.808 -0.024 -0.005 -0.015 +0.008 303 1249.167 -0.083 -0.101 -0.095 -0.074 504 1283.270 0.000 +0.019 +0.005 +0.042 SD5 1351.283 -0.033 -0.024 -0.014 -0.010 689.000 -0.004 -0.007 +0.002 +0.008 J1 J2 398.257 -0.005 +0.001 +0.009 +0.008 NL3 428.277 -0.001 -0.007 +0.007 +0.011 "P'- 1032.911

• IT.029

-0.002 -0.004 -0.008 b. I L. l' o i e NO MEASUREMENT TAKEN

• M PLUS INDICATES DISTANCE AWAY FROM INSTRUMENT LOCATION. MINUS INDICATES OtSTANCE TOWARC l

INSTRUMENT LOCATION. ,k i es=

• w.

..w- - =. -... . -. ~ t b ~5 hr h.filda f.a?svu**..we. ' CLIENT..u w c. wLLtNG wrg,g -l h w.['t"".22."*""%.e > . PROJECT IA!UnGS DAM 2. ' we +tmasuvama aussts, og - 4atpaTofL3MTION RELJriVE CHANGC LOCATICN.gw.ptCH MCX, NM acavevgeout,aos stue MSTRUMNT STATION - "P". .JO8 NQ J 3 4 RUM'NO. 1 2 3-4' 5 6 7

(ATE-8 79 9-18-79 10-20-79 10-27-79 11-2-79 11-6-79 ggfggkweg

~ R EL ATlVE CHANGE ' (F T.) Nut. 3ER ' DI$ TANG " N" 1580.495 +0.003 0.000 -0.003 'N6 1509.554 -0.001 40.003 +0.007 j N7 1399.075 -0.004 +0.004 - +0.007 I Na 1308.721 -+0.009 +0.003 +0.014 }. w9 1142.196 +0.002 -0.001 +0.009 N10 959.552 +0.004 g,oog +0.013 gli 785.950 +0.013 +0,003 +0.00s 1 N12 703.712 +0.010 +0.006 +0.009* J 1.002 +0.006 313 631.029 +0.006 ' 0 N14 561.711 +0.021- +0.014 +0.023 . N15 492.325 +0.011 +0.010 +0.005 N16 .412.296 +0.014 +0.016 +0 015

0

1033.229 -0.006 -0.001 +0.008 p,e L. l. l t t e _ 8up W No MEASUREMENT TAKER lI

1. M PLUS INDICATES DISTANCE AWAY FROM INSTRukEMT LOCATION. MINUS INDICATES DISTANCE TOWARD

] '( INSTRUMENT LOCATION. ) I' --.i'-.. ,w ,r.

.._7 M e e 0 9 I e

(

E I 1 c-l,. F f I l BE.S m e b # pase .e p WM 9 8 4 h ,e* 9 .) SECTION C 7 6 f.i Elevations .I_ :.

i - ~. - .27,. ... q_1 ... ga j sru a.a ' v. g'. Aps *3*;;;,7f'% > , CUEtJ T U V c. mutNG PROJECT Taft N 5 D2 M ... n.,,m vun cu.. c t oCANN CE" * "'d "Atenuteout.. e.es *SPHO 4ADNITOR"-STATJON ELE VAT f0NS.., JOB NO. 12DS4 RUN NO. I 2 3 4 S 6 7 't.f E _8-17-79 9-17-79 10-20-79 10-27-79 11-1-79 11-5-79 .ADNIIOR ~' L D. E t, E V A T I O N Nu'.tBER l NI 6968.967 6968.973 6 % 8.943 6968.950 6968.947 6969.943 N2 69.260 69.266 69.230 69.240 69.230 6969.227 N3 68.830 68.837 68.806 68.817 68.803 6968.800 N4 67,960 67.964 67.940 67.930 6967.930 l NS 69.360 69.373 69.357 69.350 6969.350 N6 69.370 69.380 69.'a59 69.347 6969.350 N7 69.B87 69.900 69.883 go_n7g 6969.877 l NB 68.990 69.000 68.980 68.977 6968.973 N9 70.427 70.433 70.403 70.406 6970.403 r-N IO 69.047 69.060 69.023 69.026 6969.020 Nil 68.057 68.070 68.036 gp_ nag 6968.047 N t2 67.630 67.637 67.603 67.610 6967.607 ~ Nf3 68.103 68.117 68.086 68.087 6969.083 Nt4 68.580 68.580 68.539 AA_mmn 6968.543 N!5 68.090 68.103 68.07.3 68.080 6968.080 N16 68.910 68.927 68.896 68.907 6968.903 Not c7'68.217 68.201 68.146 68.160 68.146 6968.143 NO2 ,f68.413 68.401 68.336 68.350 68.356 6968.840 NO3 72.886 72.911 72.860 72.873 .72.880 6972.870 ..-'(;DI 7'68.580 68.563 68.493 68.500 68.490 6968.483 ,,,_5U2 /J 69.960 69.926 69.866 69.870 69.867 6969.863 S03 469.160 69.116 68.976 68.986 68.980 6968.980 504 .'.' 67. 913 67.823 67.693 67.709 67.693 6967.7DO SD5 6968.723 6968.710 6968.636 68.650 68.647 6968.650 58 6964.980 64.955 64.940 64.940 6964.940 $9 6964.610 64.561 64.516 64.514 6964.510 Sto 6963.690 63.668 63.656 63_ggo 6963.660 Sie roAa non A4_n49 64.026 64.030 6964.033 52 6964.417 64.348 64.303 64.304 6964.293 I NOR':7i POND 6954.6 6954.66 6954.47 6954.33 INDICATOR BOARD $1 NORTH POND 6954.37 CENTER POND 6953.1 6953.71 6954,86 6955.80 r. INDICATOR BOARD #1 CENTER POND 6955.9 sot,r.'E POND 6951.8 6951.81 6951.65 6951.53 INDICATOR BOAP.D fl SOUTH POND 6951.1 BORROW PIT 6942.12 6942.15 INDICATOR BOARD fl - BORROW PIT

l..

t

• NO MEASUREMENT s

~

r i 7 j \\ ~ 'l ( LOCATION OF HALL HYDROSTATIC PRESSURE CELLS (HPC-7) l Piezometer Number location [ PS-1 Noc Yet Installed PS-2 Not Yet Installed ? PS-3 25' L of CL Sta. 13+00 i PS-4 100' L of CL Sta. 13+00 PS-5 100' L of CL Sta. 19+00 i j PS-6 25 ' L o f CL S ta. 19+00 PS-7 25' L'of CL Sta. 24+50 l PS-8 25' L of CL Sta. 30+50 PS-9 25' L of CL Sta. 39+00 PS-10 100' L of CL Sta. 45+00 i i PS-11 25' L of CL Sta. 45+00. PS-12 25' L of CL Sta. 50+00 PS-13 100' L of CL Sta. 56+60 PS-14 100' L of CL Sta. 56+60 l 6 i t I l l 1 l ( l -X1"i SERGENT HAU$XINS & BECKWITH i i J

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.[ s.,.. g i l ( l 30NITOR VELL ANALYSIS REPORT I Sample Sampling Well-201 We11-202 Identification / Date (11-9-79) (11-9-79) . Chloride (mg/1) 80.9 70 Conductivity (umhos/cm) 3800 e 20'c 4550 e 19'c i Salinity (parts /thousand) 2 3 i pH 25 C 4.23 4.17 Sulfate (mg/1) 5974.5 6256.3 Total Dissolved Solids (mg/l) 9218 10928 i Iy l I I i f i s 1 !.( se 4 .h}}