W911SA22B2008 ATTACHMENT 7 - W-2022-0002_Fort McCoy North Post_Well Nos 24 29_Rehab_Pump-Motor Replacement_Approval.pdf

State of Wisconsin

DEPARTMENT OF NATURAL RESOURCES

101 S. Webster Street Box 7921 Madison WI 53707-7921

Tony Evers, Governor Preston D. Cole, Secretary

Telephone 608-266-2621 Toll Free 1-888-936-7463

April 1, 2022

MICHAEL MILLER

FORT MCCOY NORTH POST

2171 S 8TH AVE

FORT MCCOY WI 54656

Project Number:

PWSID#:

DNR Region:

County:

W-2022-0002 64203029

WCR

Monroe

SUBJECT: WATER SYSTEM FACILITIES PLAN AND SPECIFICATION APPROVAL

Dear Mr. Miller:

The Wisconsin Department of Natural Resources, Division of Environmental Management, Bureau of Drinking Water and Groundwater, is conditionally approving plans and specifications for the following project. An engineering report or information of sufficient detail to meet the requirements of s. NR 811.09(3), Wis. Adm.

Code, was submitted along with the plans and specifications.

Water system name: Fort McCoy North Post Date received: 01/03/2022 Engineering firm: Short Elliott Hendrickson Professional Engineer: Jeffrey S. Nussbaum, P.E.

Regional DNR Contact: Alex Avalos, 3550 Mormon Coulee Road, La Crosse, WI 54601, (608) 790-5907, alejandro.avalos@wisconsin.gov DNR Plan Reviewer: Benjamin Mand, 101 South Webster Street, Madison, WI 53703, (608) 576-4778, benjamin.mand@wisconsin.gov

Project Description: On behalf of Fort McCoy North Post, Short Elliott Hendrickson has submitted plans and specifications for the rehabilitation of Well Nos. 24 and 29. Additionally, it is proposed to replace the existing motor and well pump in like-kind at Well Nos. 24 and 29. The department hereby approves the well rehabilitation and pump replacements, subject to the conditions below.

The well rehabilitation work at both Well Nos. 24 and 29 will be performed to restore lost capacity. The rehabilitation at Well No. 24 will be performed to remove iron bacteria. The rehabilitation at Well No. 29 will be performed to decrease sand production.

Well No. 24 (WUWN: YG656) was constructed in 2011 by Sam’s Well Drilling, Inc., obtains water from a sandstone formation, and has a total depth of 202 feet. A 16-inch diameter casing is set and grouted in place with neat cement to a depth of 103 feet. A 15-inch diameter open borehole extends from 103 feet to 202 feet.

Well No. 29 (WUWN: YO929) was constructed in 2015 by Municipal Well & Pump, obtains water from a sandstone formation, and has a total depth of 202 feet. A 16-inch diameter casing is set and grouted in place with neat cement to a depth of 83 feet. A 15-inch diameter open borehole extends from 83 feet to 202 feet.

Project Number: W-2022-0002 Page 2

Based on the submittal, the department understands the approach to the well rehabilitation work to be as follows:

Well No. 24:

1. Remove the permanent pumping equipment from the well.

2. Televise the well.

3. Brush the well casing with a wire brush. Bail fill as necessary.

4. Mix above grade a chemical solution containing 85 gallons of inhibited 75% active phosphoric acid, 5.5 gallons of NW-310 Bio Dispersant, and 500 gallons of water. Inject the solution into the well via tremie pipe. Surge the solution between the well and the above grade mixing tank with a temporary pump for 4 hours.

a. Monitor the pH during mixing. If the pH rises above 3.0 SU, add additional 75% active phosphoric acid and water at a rate of 2 gallons of acid per 1 gallon of water as needed.

5. Pump spent solution to a neutralization tank. Neutralize with sodium bisulfate prior to discharging to the sanitary sewer.

6. Mix above grade a chemical solution containing 6 gallons of 12.5% sodium hypochlorite, 3.5 gallons of NW-410 chlorine enhancer, and 2,850 gallons of water. Inject the solution into the well via tremie pipe.

Surge the solution between the well and the above grade mixing tank with a temporary pump for 3 hours.

7. Pump spent solution to a neutralization tank. Neutralize with sodium bisulfite prior to discharging to the sanitary sewer.

8. Install new permanent pumping equipment after disinfecting it with a 200 mg/L chlorine solution.

9. Treat the water in the well with a 12.5% sodium hypochlorite solution to achieve a minimum chlorine residual of 100 mg/L.

10. Surge the well at least three times.

11. Let solution stand in well for a minimum of 12 hours.

12. Pump spent solution to a neutralization tank. Neutralize with sodium bisulfite prior to discharging to the sanitary sewer.

13. Perform a short pumping test and document the new well hydraulic parameters. After there is no detectable chlorine residual measured, the well will continue to be pumped to waste for at least 15 minutes. Collect two bacteriologically safe samples a minimum of 8 hours apart before placing the well back in service.

Well No. 29:

1. Remove the permanent pumping equipment from the well.

2. Televise the well.

3. Brush the well casing with a wire brush. Bail fill as necessary.

4. Set a round of 10-pound charges at a depth of 182 feet, 187 feet, 192 feet, and 197 feet and detonate.

5. Remove dislodged material from the well.

6. Install new permanent pumping equipment after disinfecting it with a 200 mg/L chlorine solution.

7. Treat the water in the well with a 12.5% sodium hypochlorite solution to achieve a minimum chlorine residual of 100 mg/L.

Project Number: W-2022-0002 Page 3

8. Surge the well at least three times.

9. Let solution stand in well for a minimum of 12 hours.

10. Pump spent solution to a neutralization tank. Neutralize with sodium bisulfite prior to discharging to the sanitary sewer.

11. Perform a short pumping test and document the new well hydraulic parameters. After there is no detectable chlorine residual measured, the well will continue to be pumped to waste for at least 15 minutes. Collect two bacteriologically safe samples a minimum of 8 hours apart before placing the well back in service.

All chemical products will be ANSI/NSF 60 certified.

Well No. 29 Reconstruction: If the proposed rehabilitation at Well No. 29 is unsuccessful, it is indicated that the installation of a liner screen will be considered. The installation of the liner screen is not being approved by the department at this time. Plans and specifications must be submitted to the department for review and approval prior to the well reconstruction.

Liability: It is the responsibility of the owner and consultant to ensure that the well rehabilitation is completed in accordance with the requirements of ss. NR 811.12(11)-(13) & NR 811.12(19)-(20), Wis. Adm. Code, the conditions specified in this approval, and the applicable industry standards. It is also the responsibility of the owner and consultant to prevent the degradation of water quality in the well and to prevent any structural damage to well casings, grout, and screens. If the department discovers the well rehabilitation was not performed in accordance with the aforementioned requirements and conditions specified in this approval, it will be the owner’s responsibility to contact the department to determine the requirements for correcting any deficiencies prior to placing the well back in service.

Recommendations: The following recommendations are based on staff review of the project. The owner is not required to implement the recommendations to comply with the approval.

1. It is recommended that a post rehabilitation raw water arsenic sample be collected and analyzed prior to placing the well back into service.

Approval conditions related to Chapters NR 810 and NR 811, Wis. Adm. Code:

1. A resident project representative shall be designated by the water supply owner or by the agent retained by the owner. The resident project representative shall be knowledgeable regarding the proposed construction and be able to ensure the improvements are being constructed in accordance with the department approved plans, specifications, and conditions of the approval. The project representative shall be present on the work site as needed to assure proper construction and installation of the improvements. (s. NR 811.11, Wis. Adm. Code)

2. After construction, maintenance, repair or modification, waterworks facilities shall be disinfected by procedure outlined in the applicable AWWA standards for wells, water mains, storage facilities or treatment facilities. Waterworks may not be placed in service until bacteriological samples have established that the water is bacteriologically safe. (s. NR 810.09(4), Wis. Adm. Code)

3. The discharge of any chlorinated or treated water as a result of construction, disinfection, normal operations, or backwash water shall be approved by the regional wastewater contact of this department (Woody Myers, (715) 839-3726, Will.Myers@wisconsin.gov) prior to discharge and shall be authorized by and comply with a Wisconsin pollutant discharge elimination system (WPDES) permit issued by the department pursuant to s. 283.31, Wis. Stats. Information on wastewater general permits can be found on

Project Number: W-2022-0002 Page 4 the Wastewater General Permits webpage. (s. NR 810.19, Wis. Adm. Code) (https://dnr.wisconsin.gov/topic/Wastewater/GeneralPermits.html)

4. Blasting shall be conducted under the supervision of a licensed well driller and a blaster licensed by the Department of Safety and Professional Services under s. SPS 305.20. (s. NR 811.12(11)(a), Wis. Adm.

Code)

5. Proper safety measures shall be employed to protect the workers and surrounding structures. (s. NR 811.12(11)(d), Wis. Adm. Code)

6. No blasting shall occur within 100 feet of the grouted protective casing. (s. NR 811.12(11)(b), Wis. Adm.

Code)

7. All material dislodged during the blasting shall be removed from the well. (s. NR 11.12(11)(c), Wis.

Adm. Code)

8. If a well pump is replaced and is not like-kind to the existing pump, a pump submittal checklist (Form 3300-226) shall be submitted and be approved by the department prior to installation. (s. NR 811.08(2), Wis. Adm. Code)

9. Alex Avalos of the department's La Crosse office shall be notified of the date and time of start of the well work at least 48 hours in advance in case he deems it necessary to be present during any of the work. (ss.

NR 811.12(12)(a) & NR811.12(11)(e), Wis. Adm. Code)

10. Ben Mand and Alex Avalos shall be notified in writing within 30 days of completing the well work of the static and pumping water levels, the gallon per minute production rate, and the specific capacity of the well before and following the completion of the well rehabilitation work. (s. NR 811.12(13)(b)6., Wis.

Adm. Code)

11. Final plans and specifications for the Well No. 29 liner screen, along with any required DNR Checklists, shall be submitted to the department for review and written approval, prior to installation. (s. NR 108.04(2), Wis. Adm. Code)

Approval constraints: The project was reviewed in accordance with ss. 281.34 and 281.41, Wis. Stats. for compliance with Chapters NR 108, NR 810, NR 811 and NR 820, Wis. Adm. Code and is hereby approved in accordance with ss. 281.34 and 281.41, Wis. Stats. subject to the conditions listed above. This approval is valid for two years from the date of approval. If construction or installation of the improvements has not commenced within two years the approval shall become void and a new application must be made and approval obtained prior to commencing construction or installation.

This approval is based upon the representation that the plans submitted to the department are complete and accurately represent the project being approved. Any approval of plans that do not fairly represent the project because they are incomplete, inaccurate, or of insufficient scope and detail is voidable at the option of the department.

Appeal rights: If you believe that you have a right to challenge this decision, you should know that the Wisconsin Statutes and administrative rules establish time periods within which requests to review department decisions must be filed. To request a contested case hearing pursuant to s. 227.42, Wis. Stats., you have 30 days after the decision is mailed, or otherwise served by the department, to serve a petition for hearing on the Secretary of the Department of Natural Resources. Requests for contested case hearings must be made in accordance with ch. NR 2, Wis. Adm. Code. Filing a request for a contested case hearing does not extend the 30 day period for filing a petition for judicial review. For judicial review of a decision pursuant to ss. 227.52 and 227.53, Wis. Stats., you must file your petition with the appropriate circuit court and serve the petition on the department within 30 days after the decision is mailed. A petition for judicial review must name the Department of Natural Resources as the respondent.

Project Number: W-2022-0002 Page 5

STATE OF WISCONSIN

DEPARTMENT OF NATURAL RESOURCES

Project Plan Reviewer

Benjamin M. Mand Public Water Engineering Section Bureau of Drinking Water and Groundwater

For the Secretary

Ken W. Scherer, P.E.

Public Water Engineering Section Bureau of Drinking Water and Groundwater cc: Brad Noth – Water Operator, Fort McCoy North Post

Jeff Nussbaum – Short Elliott Hendrickson, Chippewa Falls Troy Stapelmann – DNR, Eau Claire Alex Avalos – DNR, La Crosse Woody Myers – DNR, Eau Claire