Nye County Agenda Information Form
NYE COUNTY AGENDA INFORMATION FORM Action Presentation a Presentation & Action Department: Public Works Category: Regular Agenda Item II I I/ Contact: Samson Yao, Director Phone: 775-751-6844 Continued from meeting of: I I Return to: I Location: Tonopah Phone: Action requested: (Include what, with whom, when, where, why, how much ($) and terms) Discussion and possible decision, modification and/or approval for Farr West Engineering to undertake detailed engineering design and preparation of construction con.iract documents for the upgrades to the sewage lagoons at the Gabbs Sewerage Treatment Facility, and funding of same. The funding for this work is not budgeted. Complete description of requested action: (Include, if applicable, background, impact, long-term commitment, existing county policy, future goals, obtained by competitive bid, accountability measures) The Nevada Division of Environmental Protection (NDEP) has indicated the need for improvements to the Gabbs Sewer Treatment Facilities for the past couple of years. In 2006, Public Works completed a Preliminary Engineering Report to address this need. Per a letter dated January 17, 2007 NDEP requested that an engineering plan and the design specifications to line the Gabbs wastewater treatment pond in accordance to the current state guidelines be submitted by January 31, 2007. A one (1) year extension for the submittal of this material was requested on January 26, 2007. In order to provide this material to NDEP in a timely manner and apply for state or federal grant, it is crucial that the engineering design be completed as soon as possible. We recommend that Farr West Engineering of Reno, Nevada be retained to perform this work. They have recently completed a similar type project for the Beatty Sewer Treatment Facilities and this experience will contribute directly to the engineering design work for the Gabbs treatment ponds. Staff has filed a request to NDEP for inclusion of this project on their list of potential projects to be considered for 2007 State Revolving Fund. This project also has potential for United States Department of Agriculture (USDA) loan. However, records show that the success in obtaining any state or federal loan and the amount is usually contingent upon a use rate increase being brought close to or above the average rate of the rural communities of Nevada. Copy of the Professional Service Agreement, and additional information regarding sewer use rates in Nevada and loan Vs rate increase are appended. I Any information provided after the agenda is published or during the meeting of the Commissioners will require you to provide 20 copies: one for each Commissioner, one for the Clerk, one for the District Attorney, one for the Public and two for the County Manager. Contracts or documents requiring signature must be submitted with three original copies.
Expenditure Impact by FY(s): (Provide detail on Financial Form) No financial impact The funding for this work is not budgeted.
Routing & Approval (Sign & Date) 1. Dept Date 6. Date 2. 1 7. HR Date I Date 3. 1 8. Legal I Date I Date 4. 1 9.Finance -- I Oate
- Board of Countv- Commissioners Action P Approved P Disapproved ] Amended as follows: 1 AGENDA FINANCIAL FORM
Agenda Item No.: I.Department Name: Public Works 2. Financial Contact Person: Pam Webster Direct Phone 482-8 t 38 3. Personnel Contact Person Direct Phone 4. Was the Budget Director consulted during the completion of this form (Y or N)? N 5. Does this item require a budget adjustment to be made (Y or N)? Y 6. Account Number Data: (Complete for all revenue and expenditure lines and for all fiscal years that are impacted. Budqeted: Y=Yes, N=No, A=Absorbed in budget (state how under "Comments" section below.)
FY Budgeted Fund Dept # Function 0bject $ Amount
06 N $51,400 Eng Design
7. Comments:
Completed by: Date: Signature Samson Yao
From: Brent Farr [[email protected]] Sent: Monday, February 10,2007 7: 10 PM To: [email protected] Subject: Ernailing: Farr West Agreement - Gabbs WWTP 2-1 9-07
Farr West Eement - Gabbs Wb <
Beatty Water and Sanitation District Paradise Valley Sewer District Gerlach General Improvement District
Please let me know if you have any additional information.
Thanks ,
Brent Farr, P.E. Farr West Engineering 5442 Longley Lane, Suite B Reno, Nevada 89511 (775) 851-4788 Main (775) 853-7255 Direct (775) 851-0766 Fax Professional Services Agreement
THIS PROFESSIONAL SERVICES AGREEMENT is made and entered into this 6th day of March, 2007, by and between the COUNTY OF NYE, NEVADA, P.O. Box 153, Tonopah, Nevada 89049 ("County"), and Farr West Engineering, 5442 Longley Lane, Suite 5, Reno, Nevada 89521 ("Consultant").
WITNESSE TH:
WHEREAS, the County desires to make certain improvements to the Gabbs Wastewater Treatment Facility; and WHEREAS, the County is desirous of employing the Consultant to prepare plans and specifications for said improvements and to perform certain construction management duties, and the Consultant is qualified and desires to provide said support, NOW THEREFORE, it is hereby agreed by and between the parties as follows:
1. SCOPE OF WORK. The Consultant will provide technical and professional assistance to the County's Public Works Department ("Department") or the Director of Public Works ("Director"). Specifically, the Consultant shall:
1.1. Complete all of the tasks, objectives and duties delineated in the document entitled "Scope of Work and BudgeUFee Schedule" (hereafter, "Services"), attached hereto as Exhibit A" and incorporated as a part of this Professional Services Agreement.
1.2. Provide the Director a schedule of work as per Section 4 and complete monthly and other reports and presentations as required by the Director on progress made in completing the aforementioned Services, and inform the County regarding the progress and status of the Services at such times and in such a manner as the County may require, as requested by the Director.
2. PROVISION OF SERVICES. The parties agree that Brent Farr, P.E., Farr West Engineering will be the Project Manager for the work performed under this Professional Services Agreement. The Project Manager may assign other employees or agents of the Consultant to carry out some or all of the Work under this Professional Services Agreement, but in such case, the Project Manager will be responsible for the supervision and predominance of those employees and agents.
3. TERM AND EXTENSIONS. Except as hereafter provided, the Consultant shall commence performance of this Professional Services Agreement on March 6th, 2007, and shall complete the Services, as described in Section I,to the satisfaction of the County by October 16, 2007, unless a written extension is granted by the County Board of Corn missioners.
4. SCHEDULE. Within two weeks upon execution of this Agreement, the Consultant shall submit to the Director for approval its schedule of work with Gantt chart(s) indicating the time lines, completion time of each phase, task, milestones, intermediate and final deliverables etc. and associated individual and cumulated expenditures relative to the timelines. Such schedule shall be updated thereafter on a monthly basis and submitted to the Director for approval. 5. COMPENSATION.
As and for compensation for the performance of the Services as described in Exhibit "A herein, the Consultant shall receive from the County an amount on time and material basis, not to exceed: Phase 1 - fifty one thousand, four hundred Dollars ($51,400.00); Phase 2 - twenty eight thousand, eight hundred ten Dollars ($28,810.00) including disbursements, which amount shall be the "upset" limit with potential to be less. The County shall pay such amount to the Consultant in accordance with the rate set in Exhibits "A" and "B" attached hereto and incorporated as a part of this Professional Services Agreement.
5.2. Consultant shall submit a monthly invoice package to the County which:
(i) Includes Certified Time Sheets that show actual hours committed to performing the Services in Section 1, a Services Rendered Summary and Invoice, prepared as described in Exhibit "C", entitled "Records Requirements" and attached hereto and incorporated as a part of this Professional Services Agreement; (ii) Includes an expense reimbursement request that complies with Exhibits "A and "8"and includes a rep0 rt on progress made during the invoice period; (iii) Includes a report on progress made during the invoice period; and (iv) Complies with all other procedures regularly required by the County.
5.3. The County will make a good faith effort to process the claim in a timely and expeditious manner within 45 days upon receipt of invoice.
5.4. The Consultant agrees that, upon receipt of monies from the County based upon a claim against the County for payment under this Professional Services Agreement, monies due and owing to employees, sub-consultants, and others under that claim will be paid to those employees, sub-consultants, and others forthwith. Failure to do so constitutes a material breach of this Professional Services Agreement. The County reserves the right to make out reimbursement checks with Consultant and its sub- consultants as joint payees if the County determines that if is in its best interests to do SO.
6. INDEPENDENT CONSULTANT. The parties agree that Consultant is an independent Consultant and that the Consultant is not a County employee or agent of the County.
7. TRANSFER OR ASSIGNMENT. The parties hereto expressly agree that this Professional Services Agreement is a personal services contract, dependent upon the unique qualifications and abilities of Consultant. The Consultant agrees that there shall be no transfers or assignment of, or participation in this Professional Services Agreement granted to any third party without written consent from the County.
8. INDEMNIFICATIONAND INSURANCE.
8.1. The Consultant agrees to fully exonerate, indemnify and save the County harmless from and against all claims or actions, based upon or arising out of damage or injury (including death) to persons or property caused by and/or sustained in connection with Consultant's performance under this Professional Services Agreement or by conditions created thereby; and further agrees, if requested by the County, to assume without expense to the County, the defense of any such claims or actions, unless such damage 2 of 20 or injury was caused by the County's actions.
8.2. The County agrees to fully exonerate, indemnify and save Consultant harmless from and against all claims or actions, based upon or arising out of damage or injury (including death) to persons or property caused by and/or sustained in connection with County's performance under this Professional Services Agreement or by conditions created thereby, and further agrees, if requested by Consultant, to assume without expense to Consultant, the defense of any such claims or actions, unless such damage or injury was caused by Consultant's actions.
8.3. The Consultant will maintain in effect, for the terms of this Professional Services Agreement, employers' liability insurance and workers' compensation, at not less than the statutorily required minimums, for any employees who may or will do any work under the provisions of this Professional Services Agreement; and vehicle insurance on each vehicle used in the carrying out of this Agreement, with coverage of not less than Five Hundred Thousand Dollars ($500,000) per person and One Million Dollars ($1,000,000) per occurrence for bodily injury and Three Hundred Thousand ($300,000) property damage.
9. COMPLIANCE WlTH APPLICABLE LAW AND REGULATIONS. During the term of this Professional Services Agreement and while performing the scope of work, or otherwise acting on behalf of the County, Consultant agrees to perform all terms and conditions of this Professional Services Agreement in a lawful manner and in conformity with all applicable laws and codes of the United States and of the State of Nevada, and all ordinances, rules, and regulations of the County and of any and all other competent public authority applicable to the performance of Consultant's duties. Failure by Consultant to comply with any applicable laws, codes, ordinances, rules and/or regulations constitutes a material breach of this Professional Services Agreement,
10. COMPLIANCE WlTH LABOR LAWS. The Consultant shall comply with Executive Order 11246, entitled "Equal Employment Opportunity" as amended by Executive Orders 11375 and 12086 as supplemented in Department of Labor Regulations (41 CFR Part 60). The Consultant will not discriminate against any employee employed in the performance of this Professional Services Agreement because of race, sex, creed, color, physical or mental handicap, or national origin.
10.1. The Consultant will take affirmative action to ensure that applicants for employment are not discriminated against on account of their race, sex, creed, color, physical or mental handicap, or national origin during the hiring process or their terms of employment. This requirement shall apply to, but not be limited to, the following: employment, upgrading, demotion, or transfer; recruitment or recruitment advertising, layoff or termination; rates of pay or other forms of compensation; and selection for training, including apprenticeship.
10.2. In the event that the Consultant signs any subcontracts for provision of services under this Professional Senrices Agreement, the Consultant shall include a provision requiring compliance with the aforementioned Executive Order and Department of Labor regulations,
11. RECORDS. The Consultant shall maintain such records and accounts, including property, personnel, and financial records, as are deemed necessary by the County to assure a proper accounting for all project funds. Specific records which must be maintained are set forth in Exhibit "C".
11.1. The Consultant will retain these records for least four (4) years after the expiration of this Professional Services Agreement or after all other pending matters surrounding this Professional Services Agreement are closed, whichever is longer.
11.2. The Consultant shall permit, and shall require its sub-consultants to permit the County to inspect all work, materials, payrolls, and other data and records with regard to the Services until the four (4) year period expires.
1 I .3. The Consultant shall collect and submit or otherwise make available to the County, at such times as it may require, such financial statements, data, records, contracts, and other documents related to the Services as may be deemed necessary by the County until the (4) year period expires.
12. PUBLICATION. The Consultant may publish results of its function and participation in Project, provided that prior written approval of the County is obtained and that copies of each publication are furnished to the County prior to publication.
13. COPYRlGHTS AND LICENSES. If the Services performed by Consultant pursuant to this Professional Services Agreement result in a book, software application, customized templates or other copyrightable or licensable material, the Consultant may copyright or license the work and turn the copyright or licensing the works and turn over to the County, the party ultimately receiving the copyright or licensing rights to the material to be determined at the end of the project. The County reserves a royalty-free, non-exclusive and irrevocable license to reproduce, publish, or otherwise use, and to authorize others, use, all technical information or data, and all copyrighted material resulting from the Services.
14. DISCOVERY OR INVENTION. If any discovery or invention arises out of or is developed in the course of, or is aided by these Services, it shall be promptly and fully reported to the County, including full and complete technical information, for determination as to whether patent protection on such invention or discovery shall be sought and how the rights to the invention or discovery, including rights under any patent issued thereon, shall be disposed of and administered to protect the public interest. The County reserves the entire right, title, interest, and a royalty-free, non-exclusive and irrevocable license to utilize and to authorize others to utilize any discovery or invention, which can be or is patented that results from the Services.
15. PROHIBITED USE OF FUNDS. The Consultant shall not seek funds from the County to be used either directly or indirectly to pay for bad debts; contingencies; contributions and donations; entertainment; fines and penalties; interest and other financial costs; unrecoverable costs under grant agreements; prosecution of claims against the Federal Government; or taxes which the County is not legally required to pay.
16. ORGANIZATIONAL CON FLlCT OF INTEREST.
16.1.Consultant agrees to:
(i) Provide excellent technical support to the County consistent with the Services set forth in Section I; (ii) Refuse to solicit or perform any work for any other party or supply any information or analysis currently maintained by the Consultant to any other party that could reasonably be expected to be used against the County. (iii) Refuse to seek to perform work, and to not actually perform work for others that would be contrary, or could reasonably be construed to be contrary, to the County's best interests.
16.2. The provisions of this Section 16 shall be applicable during the terms of this Professional Services Agreement to the performance of, or participation by the Consultant in activities such as discussed in Section 16.1, above, as a Consultant, sub-consultant, co-sponsor, joint venturer, consultant, or in any other similar capacity, and shall be applicable to any of Consultant's employees, affiliates or sub- Consultants, or their successors in interest (hereinafter collectively referred to as "Consultant").
16.3. The County may grant a waiver to the Consultant to perform certain tasks for other clients, as requested by the Consultant, when these tasks may, in the Director's opinion, present a conflict of interest under this Professional Services Agreement, when said waiver is approved in written form by the Commission and incorporated into this Professional Services Agreement as an addendum.
16.4. Except as otherwise provided in Section 16.3, above, the Consultant agrees not to represent any other governmental or private entities concerning issues related to Nye County Street and Highway Plan, or any governmental, intergovernmental, or otherwise public or private legislative planning, oversight or advocacy group relating to the same.
16.5. The Consultant will, prior to execution of this Professional Services Agreement warrant by affidavit, attached hereto as Exhibit "D", that it is in compliance with this Section 16.
16.6. The Consultant agrees that if he discovers an organizational conflict of interest with respect to this Professional Services Agreement, an immediate and full disclosure shall be made in writing to the County, which shall include a description of the action, which the Consultant has taken, or proposes to take, to avoid or mitigate such conflict. If such an organizational conflict is discovered, the County reserves the right to terminate the Professional Services Agreement, without prejudice, for convenience if it deems such termination to be in the best interests of the County.
16.7. For breach of any of the above restrictions or for nondisclosure or for misrepresentation of an relevant facts required to be disclosed concerning this Professional Services Agreement, the County may terminate the Professional Services Agreement for default, disqualify the Consultant for subsequent related work for the County and pursue such remedies as may be permitted by law. This subsection 16.7 does not limit any remedies set forth in Sections 20 and 21 , below.
17. CONFIDENTIALITY OF IMFORMATION. Atl information, data, analysis, developed software and customizations or reports generated by the Consultant under the scope of this Contract shall be considered confidential until such time that the County releases the information, analysis or reports to the public or they enter the public domain through no fault of the Consultant. All information, analysis or reports provided to the Consultant, which is identified by the County as confidential, shall not be copied, or partially copied or released to any other party without the written approval of the County. 18. NON-DEBARMENT CERTIFICATION. Attached to and incorporated into this Professional Services Agreement as Exhibit "E" is a Certification of Non-Suspension and Non- Debarment, which the Consultant must sign before performing or receiving compensation under this Professional Services Agreement.
19. TECHNICAL CAPABILITIES AND LEVEL OF EFFORT. The Consultant commits to provide such professional capabilities as will be required to perform in a competent and professional manner under this Professional Services Agreement.
20. TERMINATION OF AGREEMENT WITHOUT CAUSE. Either party to the Professional Services Agreement has the right to terminate the Professional Services Agreement without cause by giving not less than fifteen (15) days written notice to the other party by U.S. Postal Service certified mail to the addresses listed on the signature lines of this agreement or by hand delivery of such notice to the other party.
20.1. In the event termination without cause by the County, the Consultant shall be Compensated for all services rendered and expenses incurred up to the termination date, pursuant to the provisions of this Professional Services Agreement. 20.2. In the event termination by the Consultant, the County will be compensated either directly and/or in the form of a reduction in its outstanding obligation for all costs caused by the Consultant's cancellation.
21. TERMINATION OF AGREEMENT WITH CAUSE.
21.1. This Professional Services Agreement may be terminated without prior notice by the County if the Consultant fails to complete the Services in a manner which the County deems satisfactory, and the County may impose such sanctions as it may determine to be appropriate, including, but not limited to:
(i) Withholding of payments to the Consultant under the Professional Services Agreement until the Consultant complies; (ii) Cancellation, termination or suspension of the Professional Services Agreement in whole or in part; andtor (iii) Charging to the Consultant all costs caused by the breach.
21.2.111 the event of termination without prior notice by the County, the County shall give written notice to Consultant as soon thereafter as is practicable by U.S. Postal Service Certified Mail to Consultant's address herein, or by hand delivery of such notice to the Consultant.
22. AGREEMENT CONTINGENT ON FUNDING. Notwithstanding any of the other provisions of this Professional Services Agreement, it is agreed and the Contractor acknowledges and understands that payment of compensation under the terms of this Professional Services Agreement is contingent upon availability of Nye County funds. In the event that funds are not available for any reason, work under this Professional Services Agreement shall terminate immediately upon written notice to the Contractor; and the County shall have no obligation for payment of compensation under its terms, except that Contractor will be paid for all services authorized and rendered and expenses incurred up to the termination date, pursuant to the provisions of this Professional Services Agreement. 23. GOVERNING LAW. This Professional Services Agreement shall be construed and interpreted according to the laws of the State of Nevada. In the event of litigation to enforce any of the terms or conditions of this Professional Services Agreement, the prevailing party shall be entitled to recoup such sums as the Court may fix as attorney's fees, costs, and interests.
24. BANKRUPTCY. Under no circumstances shall this Professional Services Agreement or any of Consultant's rights hereunder, constitute an asset of the estate of Consultant or any company in which Consultant holds an ownership interest, in bankruptcy or similar proceedings involving the insolvency of Consultant or such company.
25. EXECUTION OF AGREEMENT. This Professional Services Agreement may be executed in counterparts, each of which shall be fully effective as an original, and all of which together shall constitute one and the same instrument.
26. ENTIRE AGREEMENT. This Professional Services Agreement constitutes the final and entire agreement between the parties. The rights and obligations of the parties shall be determined solely from the terms of this Professional Services Agreement, and any prior or contemporaneous oral agreements are superseded by and merged into this Professional Services Agreement.
27. PRECEDING AGREEMENTS. Upon full execution and implementation, this Professional Services Agreement supersedes and voids any and all other, preceding professional services agreements between Consultant and the County, relating to services to be performed for the Department under this Professional Services Agreement.
28. AMENDMENT OF AGREEMENT. This Professional Services Agreement cannot be varied or modified orally and may only be varied or modified by a written instrument duly executed by the parties.
29. SEVERABILITY. If any provision of this Professional Services Agreement is held to be invalid, such invalidity shall not affect the validity of any other provisions of this Professional Services Agreement, which can be given effect without the invalid provision, and to this end the provisions of this Professional Services Agreement are declared to be severable.
30. ARBITRATION.
30.1. The parties agree that any dispute arising between the parties concerning the terms of this Professional Services Agreement will be subject to binding arbitration if the dispute cannot otherwise be settled. 30.2. Any dispute subjected to arbitration must be handled in accordance with applicable rules administered by the American Arbitration Association, Nevada. 30.3. In the event of arbitration to enforce any of the terms or conditions of this Professional Services Agreement, the prevailing party shall be entitled to recoup such sums as the arbitrator may fix as attorney's fees, costs, and interests.
31. PERFORMANCE MANAGEMENT. The Consultant acknowledges that it is the desire of the County to monitor, manage, record and evaluate the Consultant's performance based on the "Consultant's Performance Indicators" attached to and incorporated into this Professional Services Agreement as Exhibit "F" and the Consultant further agrees to fully cooperate with the County in the performance monitoring process. IN WITNESS WHEREOF, the patties do hereby execute this Professional Services Agreement on the latest date hereinafter appearing, binding them to the full performance of this Professional Services Agreement. This Professional Services Agreement shall not be binding upon Consultant's successors and assigns because of the nature of the personal services to be rendered hereunder.
CONSULTANT COUNTY
Farr West Engineering BOARD OF COUNTY COMMISSIONERS 5442 Longley Lane, Suite B COUNTY OF NYE, NEVADA Reno, Nevada 8951 1 P.O. BOX 153 Tonopah, Nevada 89049
By: BY
ATTEST:
SANDRA I. Merlino, Nye County Ex-Oficio Clerk of the Board
List of Exhibits:
A. Scope of Services and B udgetlFee Schedule B. Expense Reimbursement C. Records Management D. Affidavit of Compliance E. Certificate of Debarment F. Consultant's Performance Indicators Exhibit ''A"
Scope of Work
Existinq Conditions
The existing treatment system consists of a facultative lagoon cell followed by an evaporation cell. Only one primary pond exists. This is an operational risk that can lead to non-compliance when the pond fails to perform and the operator is unable to divert the flow to a second pond.
There are also a number of miscellaneous deficiencies with the treatment system that require correction, including:
I Removal of dry sludge in an adjacent decommissioned pond. 2. Trimminglremoval of overgrown weeds and vegetation in the immediate region ot the treatment lagoons. 3. Installation of a primary pond lining. 4. Reduction in the internal dike slopes of the presently functional pond.
Proposed Improvements
Construction of a New Primary Cell: Modify the existing evapotranspiration cell to become a primary cell (lined). This will double the load factor of the current cell, thus providing much flexibility in optimizing treatment efficiency.
Construction of a New Polishing Cell andlor Wetlands: Modify Pond #lB to become a polishing pond (partially lined) andlor wetlands. Due to loss of water experienced in the past, it may be necessary to install a partial dike to create a partially lined polishing cell. The remaining part can be used for constructed wetlands as a demonstration project. This constructed wetlands will include traits and observation points for demonstration and education purposes.
Tasks: Phase I - Desiqn Services
Coordinate with Nye County staff to determine design criteria, operational considerations and preferences. Coordinate surveying efforts needed in order to prepare the design. Prepare a draft design submittal (60%) for Nye County staff review and comment. Obtain NDEP approval of the final design. Coordinate grant applications with USDA, CDBG, CWSRF, and other potential funding sources. Provide complete plans and specifications for public bidding. The plans and specifications will cover all disciplines of work. Design services will include all required surveying, mapping, geotechnical work, etc. Advertise project for bidding. 8. Distribute plans and specifications to bidders, keep bidders list. 9. Attend Pre-bid Conference, Bid Opening and Pre-construction Conference. 10. Prepare bid tab. II. Coordinate Notice of Award and Notice to Proceed. 12. Review and approve contractor submittals, pay requests and change orders. 13. Attend pre-final and final inspection. Tasks: Phase II - Construction Inspection Services
Provide full-time or periodic inspection as requested by Nye County. Keep logs of construction activities. Coordinate and attend construction meetings. Responsible for all field reporting, responding to contractor's questions, etc. Coordinate and approve field testing of materials. Coordinate and monitor progress of As-Built Drawings. Prepare digital as-built drawings after completion of the project. Monitor prevailing wage requirements in accordance with Nevada laws and prepare any required reports.
Fee Estimate
Phase I - Design Services
It is possible that USDA will be involved with financing this project. Therefore, their scale was used to determine fees for professional engineering services as a percentage of construction costs.
Assuming that construction costs will be approximately $400,000, the design services fee will be 9.1%, or $36,400. This does not include outside services, such as surveying and geotechnical work. The estimate for those fees is $15,000, for a total fee of $51,400. If the County is able to provide surveying data adequate for design purposes, then there will be no fees charged for surveying.
Phase I1 - Construction Inspection Services
If USDA provides the financing for this project, full time inspection will be required. For the purposes of this proposal, it was assumed that the construction period will last two months, or approximately 43 working days. The following rates will then apply: Inspector - $70 per hour Per Diem - $50 per day Mileage - $0.485 per mile
The daily cost for inspection is estimated to be $670 per day, inclusive of all costs. This assumes that an inspector will stay on site (possibly in a trailer) for the entire week and will return home only on the weekends. For the project duration of 43 working days, the total estimate will be $28,810. If the inspection requires more or fewer days, the estimate can be adjusted by $670 per day. Exhibit "B
SCHEDULE OF REIMBURSABLE EXPENSES FOR TRAVEL, LODGING, MEALS, RENTAL VEHICLES, AND OTHER COSTS
The County shall reimburse the Consultant for expenses as follows, which expenses shall be part of the "upset limit":
Lodging: The actual and reasonable expense for lodging, when performance of the Consultant's duties under this Professional Services Agreement requires overnight travel. Flight: The actual and reasonable expense for traveling by air at coach fare or equivalent (company plane) when performance of the Consultant's duties under this Professional Services Agreement requires travel away from the Consultant's office which more expediently and/or economically may be completed by air than by land vehicle. Rental Vehicles: The actual and reasonable expense of renting a vehicle plus the cost of fuel for that vehicle, but only when the Consultant's duty under this Professional Services Agreement requires travel by air. 4. Mileage: Reimbursement for mileage (other than when travel is by airlrental vehicle) shall be at the rate of 48.5 cents per mile for all miles traveled away from the Consultant's office and pursuant to this Professional Services Agreement. No receipts for gas, oil or other vehicle expenses will be required or accepted if per-mile reimbursement is sought. 5. Meals: Reimbursement for meals during travel or when otherwise required as a part of the Consultant's duties under this Professional Services Agreement shall be at the following stipulated amounts: Breakfast, $8; lunch, $10; dinner, $16; or per diem (when the Consultant's duties under this Professional Services Agreement requires him to travel at least an entire day), $34. 6. Other Extraordinary Expenses: The County shall reimburse Consultant for other actual, reasonable, necessary and extraordinary expenses, including but not limited to: Long- distance telephone charges; postage, Fed-ex or other rapid- delivery charges; document reproduction; and online and other data retrieval. 7. The County will not reimburse the Consultant for office or work supplies or equipment or other expenses which islare purchased, acquired and used generally in Consultant's business and are not peculiarly necessary to the fulfillment of this Professional Services Agreement. Such supplieslequipment/expenses are considered a part of the Consultant's overhead, and are deemed a part of Consultant's hourly fee. 8. Claims for reimbursement of expenses which are not stipulated amounts must be accompanied by photocopies of the original receipts, bills, or other substantiating documentation of the costs incurred and paid, or the expense will not be reimbursed. 9. The County reserves the right to reject claims for reimbursement which it believes are not "reasonable", Exhibit "C" RECORDS REOUIREMENTS
Records which Consultant agrees to maintain:
1. Certified timesheets for all time, including travel time, billed to the County for professional services. Timesheets must show the total hours Consultant worked in any given day on the scope of work of this Agreement, and a notation of the activity performed for the County. The Consultant must certify that the time shown on each timesheet was actually worked by the Consultant, its employees, agents, and/or sub- Consultants. If the Consultant is a corporation or similar business entity, the timesheet must be certified by a principle of the corporation or entity. 2. Services Rendered Summary, prepared on the form prescribed by the County, detailing the services rendered and time spent performing those services under this Professional Services Contract. 3. Invoice, in the form prescribed by the County, including a certification that the charges are true and in accordance with this Professional Services Contract. 4. Monthly progress report, together with the Quality Assurance Transmittal Sheet as prescribed by the County. 5. Originals of all financial business and financial records which are customarily kept in the due course of business which, if Consultant is audited, will allow complete and detailed documentation of all monies paid to Consultant by the County and work performed by the Consultant. Exhibit "D"
AFFIDAVIT OF COMPLIANCE WITH SECTION 17, PROFESSIONAL SERVICES AGREEMENT
State of 2 ) ss: County Of 1
being first duly sworn, deposes and says:
I. I am a principal in the "Consultant" in the foregoing Professional Services Agreement; and I am able to make this Affidavit based upon my own knowledge.
2. I am familiar with the provisions of Section 15 of the Professional Services
Agreement between Nye County and Consultant, executed on or about PI 2003.
3. I and the Consultant are in compliance with the provisions of Section 'I5 of the said Professional Services Agreement. Further your Affiant sayeth naught.
SUBSCRIBED and SWORN to before me this day of ,2007
Notary Public Exhibit "E
CERTIFICATION ON NON-DEBARMENT
The Consultant certifies, by acceptance and execution of this Professional Services Agreement, that he is not presently debarred, suspended, proposed for debarment, declared ineligible or voluntarily excluded from participation in this transaction by any Federal department or agency. He further agrees by accepting and executing this Professional Services Agreement that he will include this clause without modification in all lower tier transactions, solicitations, proposals, contracts, and subcontracts. Where the Consultant or any lower tier participant is unable to certify to the statement, he shall attach an explanation to this Professional Services Agreement. By:
Signature
Date:
Business Address: Exhibit "F"
CONSULTANT'S PERFORMANCE INDICATORS
Consultant's Performance will be objectively assessed for impacts on time, cost and deliverables based on the following nine (9) areas of project management and eight (8) groups of forty-one (41) performance indicators.
A. INTEGRATION MANAGEMENT County's rejections of unjustifiedrequests for change reflect the Consultant's performance in overall change control.
1) Scopef (extra work orders, change orders, claims, surprised extras) Rejection of OVERALL CHANGE '' unjustified requests 2) Schedule (extension of time) CONTROL for change in: 3) Cost (additional resources, additionalfunding) * Scope indudes fealures and functions that characterize a product or sewice, andlor the work that must be done to deliver a product with the specified features and functions Consultant's performance in demonstrating accountability is characterized by the Consultant's refusals to assume contractual liability for oversights and duties that are clearly the Consultant's. 4) Errors, delays & omissions (unwillingness ta undolwmpensate damages) Refusal to 5) Carried over liability (deficiency from earlier phases) 2. ACCOUNTABILITY of 6) Knowledge of previous project stage (unwillingness to acquirelunderstand background 2i:3f:g knowledge) responsibilities in: 7) Reliance on owner (bquent requests far owner's coaching and/or guidance in project management or providing data)
B. SCOPE MANAGEMENT Consultant's non-adherence to established or agreed plans, requirements and procedures and proceeding unilaterally with changes in scope that are unsupported reflect Ule Consultanfs performance in scope change management. 8) Approved sources (materials, suppliers, equipment, etc) 3. ADHERENCE TO 9) Agreed plans (schedules, actions, deliierables, procedures, line of communication, etc.) REQUIREMENTS, Non-adherence to: PLANS AND 10) Pre-~0flsultedextras (last minute claims, surprised invoices, etc.) PROCEDURES 11) Established Reporting & documentation protocol (changes, minutes, issues, decisions, recommendations,elc.)
C. TIME MANAGEMENT Consultanrs lime commitment and timely actions and their overall impact on the project reflect the Consultant's performance in schedule and activity conhl. 12) Staff availability (broken promises, procrastination, delays, etc.) 13) Meetings and appointments (lateness, absence, cancellation, etc.) 4. SCHEDULE AND Lack of time ACTIVITY commitment or 14) Deadlines (late approvals, deliverables, meeting milestones, progress reporis, payment, etc.) CONTROL timely actions in: 15) Timely decisions or reactions to urgent issues (emergency, health and safety concerns, complaints) 16) Changes (delay in identifying and processing changes)
D. COST MANAGEMENT Counlyk lasses due to consultant's errors, omissions or delays in processing financial document reflect haw well the consultant pelformed in cost control and monitoring. 5. COST CONTROL & ErrOK, 0miSSions 17) Invoices or requests (progress payments, disbursements, reimbursements, holdbacks, MONITORING or delays in: etc.) 18) Cost escalations (uncontrolled) 19) Change documents (change orders, extra work orders, request for changes, etc) 1 20) Budget forecasting E. QUALITY MANAGEMENT The County's effort wasted due to failure of Consultanls timely corrections or minimizing of deficiencies in deliverables, or inadequacy of quality assurance plan reflect the ConsultanIs performance in quality management
County's loss in 21) Errors and omissions 6. DEFICIENCY ensuring correction 22) Deficiencies (due to non-compliance with regulations, standards, policies, procedures and specifications ~~~~~~~~~F or compliance of consultant's: 23) Quality assurance plan
F. HUMAN RESOURCES MANAGEMENT Consullant's demonsbalion of continuous supports with on staff project expertise, consistencies and leadership in project relevant knowledge and subjects reflect its performance in Human Resources management. 24) Subject and required procedures Lack of knowledge 7. 25) Regulations and policies of or inadequate EXPERTlZE OF 26) Current standards and related specifications PROJECT STAFF due to: 27) Frequent staff changetdeployment or actual involvement of principal-of-charge less than proposed
G. COMMUNICATION MANAGEMENT Clear, correct and Smely flow of information to various parties reflects on the performance of the Consultant in communication management. 28) Addenda
8. FLOWOF Late, inadequate, 29) Application for permits and approvals INFORMATION incomplete: 30) Reporting (performance, status, changes) 31) Budget forecasting
H. RISK MANAGEMENT Anticipating and addressing the problems in a timely and satisfactory manner reflects how well the Consultant has performed in Risk Management 32) Health and safety problems, damage to environment or public concerns 9. ANTICIPATION 33) Replacement~removalof previous work, outdated product or equipment AND to minimize risks in: 34) Changes or non-compliance (in technology, regulalon, policies, procedures and RISKS specifications)) 35) Dispute and conflict
I. ADDED VALUES Consultant's effort in providing added values, in addition to terms of reference requirements adds values to the overall beneft to the Counly. 36) Cost saving and effective solutions 37) Best available technology
Positive Impact on 38) Longer than expected life cycle VALVE the project: 39) Value for money 10) Early project completion n) Resolving or identifying problems beyond expectation 1. STATUTORY DECLARATION FORMS SD-I & SD-2 SCHEDULE SD-1
STATUTORY DECLARATION BY THE CONSULTANT SECTION 2(f): INTERIM PAYMENT
STATE OF NEVADA ) IN THE MATTER OF ) the Professional Services Agreement entered into ) between the County of Nye ) and
) dated, , ("Agreement") ) and an lnvoice dated, ("the Invoice") To Wit:
1, , of the (name) (City, Town, etc.)
in the (Regional Municipality etc.) do solemnly declare that:
1. I am a senior professional engineer employed by , hereinafter referred ta as the (name of Consultant) Consultant. I have personal knowledge of the facts herein set forth and, as a duly authorized representative of the Consultant, have the authority to certify as follows.
2. Attached hereto and marked as Exhibit A to this my declaration are true copies of statements of the Consultant as part of the Invoice addressed to the County of Nye setting forth in detail the services performed and the disbursements incurred by the Consultant during the period from the - day of , 200to the - day of ,200, and for which payment is requested. I do hereby certify that such services were performed and such disbursements were properly incurred by the Consultant pursuant to and in accordance with the provisions of the Agreement.
AND I make this solemn declaration conscientiously believing it to be true and knowing that it is of the same force and effect as if made under oath.
DECLARED before me at the of , in the of , this day of SCHEDULE SD-2
STATUTORY DECLARATION BY THE CONSULTANT SECTION 2(f): FINAL PAYMENT
STATE OF NEVADA ) IN THE MATTER OF ) the Professional Services Agreement entered into ) between the County of Nye ) and ) dated, ,("the Agreement") ) and an Invoice dated, ("the Invoice") To Wit: 1
I, , of the (name) (City, Town, etc.)
in the (Region, County, State etc.) do solemnly declare that:
1. I am a senior professional engineer employed by , hereinafter referred to as the (name of Consultant) Consultant. I have personal knowledge of the facts herein set forth and, as a duly authorized representative of the Consultant, have the authority to certify as follows.
2. Attached hereto and marked as Exhibit "A" to this my declaration are true copies of statements of the Consultant as part of the lnvoice addressed to the County of Nye setting forth in detail the services perFormed and the disbursements incurred by the Consultant during the period from the - day of 200- to the - day of ,ZOO-, and for which payment is requested. I do hereby certify that such services were performed and such disbursements were properly incurred by the Consultant pursuant to and in accordance with the provisions of the Agreement.
3. The Consultant has completed all Services (as defined in the Agreement) to be performed by the Consultant.
AND I make this solemn declaration conscientiously believing it to be true and knowing that it is of the same force and effect as if made under oatht.
DECLARED before me at the of , in the of , this day of ,200.
A Commissioner, etc. NYE COUNTY DEPARTMENT OF PUBLIC WORKS
Preliminary Engineering Report FOR Town of Gabbs Sewerage System
December 7,2005
SAMSON YAO, P.E., DIRECTOR (775) 751-6844 1Office NYE COUNTY (775) 751-6856 1F~x PUBLIC WORKS Pahrump Office (775) 209-3670 1 Cell Phone Samson Yao I Director 250 N Hwy 160 # 2, Pahrump NV 89060 File No. PW0403300029 Diana Silsby Compliances Group Bureau of Water Pollution Control Department of Conservation and Natural Resources Nevada Division of Environmental Protection 901 South Stewart Street, Suite 4001 Carson City, Nevada 89701-5249 December 7,2005 Re: Facility Plan Requirement for Town of Gabbs - #~~~70021(4*~& Final Notice)
Dear Ms. Silsby:
Further to our December 2, 2005 letter, we are pleased to submit our Preliminary Engineering Report for Town of Gabbs Sewerage System.
Electronic copy of this report has been emailed to you and copied to Mr. Mark Kaminiski.
Please accept our apology for the delay.
Should you have any questions, please feel free to give me a call.
Sincerely,
Samson Yao, M.Eng, P.E. Director
C.C. Mark Kaminiski, P.E. Technical Services Branch Tom Porta P.E., Deputy Administrator Jon Palm, P.E., Ph.D., Chief Michael Maher Preliminarv Enaineerina Re~ort- Town of Gabbs Seweraae Svstem
Executive Summary
In this Report, we have examined: The need for a detailed condition assessment of existing collection system; The possible impact of unlined primary and evaporation ponds on the potential migration of sewage to ground water table;
a The hydraulic and organic loading on the as constructed treatment system, flow trend and their impact on the treatment system; Current operation and maintenance mode of the collection and treatment systems, and the systems' vulnerability; and Current sewer use rate structure, revenue and affordability under desired mode of O&M and needed capital improvements.
We have concluded that: The 30-years old collection system shows signs of deterioration and there is an urgent need for CCNand detailed inspection of the entire system followed by a plan for rehabilitation, at a preliminary estimated cost of CCTV is $45,000 and rehabilitation is $ 126,000; The material used for the construction of the original treatment facility is of reasonably law permeability and the potential percolation of sewage to ground water table is low to remote; The treatment system is currently operating with hydraulic and organic loading equivalent to or better than the NDEP VVTS-5 criteria of 35 Ib BOD5 Ibldaylacre; The level of security for the current treatment train is close to none as the system relies totally on a single-cell pond for primary treatment. Diversion or increasing capacity of primary treatment through flow control is impossible under current mode of operation and design; and an additional primary pond should be augmented to the system as soon as possible; In connection with the treatment plant expansion, opportunity exists to create a project for demonstration/educational purposes on constructed wetlands, which will further enhance quality of effluent, protect ground and surface water contamination, and provide great opportunities for environmental education. Cost of upgrading of treatment system, including constructed wetlands is estimated at $357,000 Current sewer and water use-rate Istructure and available reserve is inadequate to fund life cycle replacement work and at least 65% of cost will have to come from other sources such as grants, e.g. CDSG, USDA and WRDA;
December 7, 2005 Page 2 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
Funding for proposed improvements recommended in this Report is proposed to come from two sources - 4.1 5% from current reserve ($21,900) and 95.85% from grant money ($506,000); and Nye County and Town of Gabbs must diligently seek federal and/or state grants to cover 95.85% of the cost the proposed improvement. If grant money received will not be adequate to cover the entire cost of improvement, it is recommended that the sewer use-rate be raised proportionally to service any loan or bond.
Respectfully prepared and submitted by:
Samson Yao, M. Eng.,P.E. Director Department of Public Works County of Nye Nevada
December 7.2005 Page 3 of 50 Preliminarv Engineering Re~ort. Town of Gabbs Sewerage Svstem
Table of Contents CHAPTER I. INTRODUCTION ...... 7
1. BACKGROUND ...... 7
2. PURPOSE ...... 8 CHAPTER 2 .COLLECTION SYSTEM...... 9 1. INFRASTRUCTURE ...... 9
2 . EXISTING CONDlTlONS ...... 9 2.1 Headwork ...... 9 2.2 Sewer System ...... 9 2.3 Maintenance Records ...... 9
CHAPTER 3 .WATER CONSUMPTION AND SEWAGE GENERATION RATE.,,,,,,,, 30 1. RECENT RECORDS ...... 10 2. WATER CONSUMPTION VS SEWAGE GENERATION ...... I0 2. I High Water Consumption ...... 10 2.2 Low Sewage Generation Rate ...... I0 CHAPTER 4 .TREATMENT SYSTEM ...... ?I 1. GENERAL DESCRIPTION ...... II
2 . INFRASTRUCTURE ...... II 3 . RECENT POND MODIFICATIONS...... 13 3.I Materials Used to Construct the Ponds ...... 14 . 1 Existing Ponds ...... 14 .2 New and Modified Dikes ...... 14 4 . Pond Evaporation and Percolation ...... 15 4 .I Evapo-Transpiration...... 15 4.2 Pond Permeability ...... 15 4.3 Projected Percolation Rate ...... 16
5 . Existing Conditions...... 17 5.1 Raw Sewage BOD5 Concentration ...... 17 5.2 Current BOD5 Loading ...... 17 5.3 Plant Performance/Effluent Quality ...... 18 5.4 Weeds and Aquatic Plant ...... 19 CHAPTER 5 .SYSTEM DEFICIENCIES ...... 20
December 7. 2005 Pase 4 of 50 Preliminarv Enaineerina Re~ort. Town of Gabbs Seweraae Svstern
1. Collection System ...... 20 1.1 Sewers ...... 20 1.2 Headwork ...... 20
2 . Treatment System ...... 20 2.1 Primary Cell ...... 20 I Lack of System Security ...... 20 .2 Parallel and Series Modes of Operation ...... 21 .3 Final/Polishing or Evaporation Cell ...... 21 .4 Constructed Wet Lands - Alternative to Polishing/Evaporation Cell ...... 21 3 . MISCELLANEOUS DEFICIENCIES...... 23 3.1 Flow Meter and Recorder Need Recalibration ...... -23 3.2 Unmarked Staff Gauge ...... 24 3.3 Dry sludge remaining in pond #2 ...... 24 3.4 Overgrown weeds and vegetation...... 24 3.5 Lack of Pond Lining ...... 24 3.6 Steep Slopes on Internal Dikes ...... 24 CHAPTER 6 .OPERATION AND MAINTENANCE ...... 25
I. OPERATING AND MAINTENANCE MANUAL...... 25 2 . CURRENT MODE OF O&M ...... 25 2.1 Duties of the Operator ...... 25 2.2 Sewer System ...... 25 2.3 Treatment Plant ...... 25 3. DESIRABLE MODE OF O&M ...... 26 3.1 Preventive Maintenance ...... -26 3.2 Effluent Quality Monitoring ...... 26 3.3 Effluent and Discharge Control ...... *...... *.....26 CHAPTER 7 .PROPOSED SYSTEM IMPROVEMENTS...... 27
I. COLLECTION SYSTEM ...... -27 II Closed Captioned Television Inspection ...... 27 1.2 Field Inspection of Appurtenances ...... 27 I.3 Life Cycle Replacement Plan / Capital Improvement Plan ...... 27 2. TREATMENT SYSTEM ...... 27 2.1 Immediate Corrective Actions ...... 27 . 1 Mark Staff Gauge ...... 27 .2 Cut weeds and Vegetation in Ponds 1A and 16 ...... 27 .3 Reduce Steep Embankmenffslope of Dike...... 27 .4 Dispose of Dry Sludge in Cell #2 ...... 27 .5 Replace Plywood Cover for Meter Chamber ...... 27 2.2 System Improvements ...... 27 .1 New Primary Cell ...... 27 December 7. 2005 Page 5 of 50 Preliminary Engineering Report .Town of Gabbs Sewerage System t. I
.2 New Polishing Cell andlor Wetlands ...... 28 3 . ESTIMATED COST OF IMPROVEMENTS...... 28 3.1 Collection System ...... 28 3.2 Treatment System ...... 29 3.3 Proposed Schedule of Works ...... 30 CHAPTER 8 .RATE STRUCTURE AND FUNDING NEEDS ...... 31 I. EXISTING RATEIFEE STRUCTURE VS REVENUEIEXPENDITURE ...... 31 2. PROJECTED NET REVENUE 1 RESERVE ...... 31
3. AFFORDABILITY OF PROPOSED SYSTEM IMPROVEMENT...... 32 3.1 Assumptions ...... 32 3.2 Life Cycle Replacement Cost ...... -32 3.3 Grant Needed ...... 32 3.4 Funding Alternative ...... 32
4 . RATE ADJUSTMENTS FOR INFLATION ...... 34 EXHIBITS 1-5 ...... 35
December 7.2005 Page 6 of 50 Preliminarv Engineering Report - Town of Gabbs Sewerage Svstem
CHAPTER I- INTRODUCTION
I. BACKGROUND
The City of Gabbs, incorporated in 1955 became the unincorporated Town of Gabbs in May 6, 2001. The City developed its sewage system in 1975 at which time the population was about 1,200. Its population estimate' from July A, -I990 to July I,2004 is shown on Chart Ibelow. Population in 2001 is 334, and it has since been no significant growth or decline. Current population is estimated to be 316.
In town, the local groundwater supply is geothermal in quality and not potable due to the elevated temperature and mineral (fluoride) content. The potable supply for Gabbs comes from wells in Lodi Valley, which are located approximately three and a half miles from town. On April 1, 2004 the Division of Environmental Protection of the State of Nevada Department of Conservation and Natural Resources (NDEP) issued a notice of action to the Town of Gabbs under Ground Water Discharge Permit # NEV70021, requiring submission by the Town of Gabbs a Facility Plan (Preliminary Engineering Report) for the Gabbs sanitary sewerage. The notice is the result of compliance evaluation inspection of the existing facility conducted by NDEP and the discovery of alteration of the facultative sewage lagoon pond #I by the operator without a permit by NDEP.
Governor Certified Population of Nevada's Counties, Cities and Towns 1990 to 2004, estimates from NV Department of Taxation and NV State Demographer, University of NV, Reno. December 7,2005 Page 7 of 50 Preliminam Enaineerina Re~ort- Town of Gabbs Seweraae Svstem
2. PURPOSE
The purpose of this report is to identify and evaluate problems related to existing Sanitary Sewage Collection System and Facultative Sewage Lagoon in the Town of Gabbs, County of Nye, State of Nevada to provide a preliminary engineering assessment of impact of the pond alteration on the treatment system, and of the possible needs for system upgrade for the entire sanitary sewerage. In particular, the Report: examines current status and potential impacts, alternate solutions, with preliminary concepts and cost estimates; describes financing methods, sets forth anticipated charges for users; reviews organizational and staffing requirements; offers a conclusion with a proposed project for Nye County consideration; and Outlines actions and procedures to implement the project.
December 7, 2005 Page 8 of 50 Preliminarv Enaineerina Re~ort- Town of Gabbs Sewerage Svstem
CHAPTER 2 - COLLECTION SYSTEM
I. INFRASTRUCTURE
The sanitary sewage collection system consists predominantly of 30-years old, eight-inch asbestos cement pipelines that serve North and South Gabbs. All wastewater influent is received via gravity flow. The system has approximately 23,400 linear feet of pipe, 80 manholes, 6 dead end cleanouts and 130 active service connections. There is no industrial discharger. Effluent is received by the headworks and is discharged through an eight-in Pa'lmer-Bowlus Flume.
2. EXISTING CONDITIONS
2.1 Headwork The headwork consists of a bar screen and the Flume. The flume, flow recorder and instrumentation appear to be in good working condition. Flow records are consistent and do not reflect any need for recalibration.
2.2 Sewer System The collection system is flushed annually. Field inspection by the writer reveals some surface deterioration and material buildups in manholes. Some manholes are poorly benched or un-benched. Inverts in one manhole appear to be in reverse order. A few manholes lack proper surface grading to reduce potential of surface inflow. One or more manhole covers appears to be a hand-made metal loosely placed on top of the manhole as a substitute for standard industrial cast iron frame and cover.
2.3 Maintenance Records Records do not show the system to be in need for major repair or rehabilitation. However, other than annual flushing, the sewer system is 30 years old and has not been systematically or regularly inspected for infiltration and inflow, solids accumulation, debris or grease, condition of pipe joints, invert and material buildup, and manholes cleanliness etc. These inspection items are recommended in the Operation ~anual~.The current maintenance activitylmode is therefore more in corrective than preventive mode. Records do not reflect the frequency or incident of cleaning such as rodding, balling or jetting, which is therefore believed not being practiced.
2 Revised and submitted to NDEP on April 14,2003 December 7. 2005 Page 9 of 50 Preliminan, Enaineerina Re~ort- Town of Gabbs Seweraae Svstem
CHAPTER 3 - WATER CONSUMPTION AND SEWAGE GENERATION RATE
1. RECENT RECORDS
While sewage flow in 1986 shows a daily average flow of approximately 75,000 gallons, it has declined to approximately 16,000 to 18,000 gallons since 2005 and has since remained steady. Table Iis a summary of records for water consumption and sewage discharge between January 2004 and October 2005.
Table I-2004 -2005 Water Consumption Vs Sewage Discharge, gallons per day
-- - @a&!m -- Jan -Mar Apr - June July Sept water 111.3U Consumption ,+, 233,44( 320.61 1 Sewage Ave 19,000 23.000 19.0W projectad (17.8001 Discharge
2. WATER CONSUMPTION VS SEWAGE GENERATION
2.1 High Water Consumption Table Ishows the average water consumption in a two-year period, during the vegetation- growing season between the months of April and October, is 261,437 gallons per day (822 gallons per capita per day). This is approximately 223% higher than the rest of the cooler months. Water demand is high from April to October for outdoor consumption such as car washing, lawn watering and garden watering etc that do not generate sewage.
2.2 Low Sewage Generation Rate The two-year average sewage flow from April to October remains relatively steady and consistently low from 16,000 0 to 23,000 gallons per day. The two-year average sewage flow is 19,700 per day or 62 gallons per capita per day. This steady and low flow is either attributed to the fact that majority of the residents in Gabbs are senior citizens who generate significantly less sewage from fixture units than families with young adults, children and teenagers (e.g., more frequent uses of dish washer, bath, shower and laundry), or to possible leakage or exfiltration in the sewer collection system.
December 7,2005 Page 20 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
CHAPTER 4 - TREATMENT SYSTEM
I. GENERAL DESCRIPTION
The Gabbs Wastewater Treatment Facility, located approximately 1 mile west of North Gabbs consists of three waste stabilizationlfacultative lagoons and three percolation/evaporation ponds. Facultative lagoon holds partially treated water for 3 to 6 weeks (up to 6 months in cold weather) at a depth of 2 to 6 feet (4 feet typical). Aquatic plants, weeds, algae, and microorganisms are used to stabilize the organic matter. The algae give off oxygen from growth in sunlight. Microorganisms to digest organic matter use oxygen. The microorganisms give off carbon dioxide, ammonia, and phosphates that the algae use. The system is capable of 75 to 95 percent BOD removal. During non-algal periods, up to 90 percent TSS removal is possible. In summer months 80 percent of the ammonia-nitrogen is nitrified, total nitrogen removal can reach 60 percent, and total phosphorus removal can approach 50 percent. Very long detention times in hot climates can reduce fecal coliforms to levels that can often meet surface water discharge standards, but typical retention times reduce fecal coliforms by 2 to 3 logs/100 mL.
2. INFRASTRUCTURE
The first four of the lagoonlponds is 7.5 feet deep and has a surface area of 132,130 square feet measured at a 3 feet water level. The 5" and 6thponds, built some time after 1975, are 9 feet deep with the same top geometry and top of dike elevation as the other four ponds. These two ponds (Pond # 3 and 6) are shown on as-built drawings3. All ponds are equipped with transfer piping to adjacent ponds. Both Ponds # Iand 2 originally have a two-foot high dividing levee to ensure a 2 feet minimum pond depth in summer. In 2003, Primary Pond #2 and the percolation/evaporation Pond #5 were abandoned. Dry sludge in the pond has yet to be re moved. Pond #Iwas subsequently modified twice. At the time of this Report, only half of one of the six ponds - Pond # 1A is being used for treatment and evaporation/percolation. Drawings Iand 2 below show the surveyed contour lines and the cross section of the new (Section A-A) and the modified (Section B-6) dikes.
3 As constructed drawing by Erik Beyer &Associates, Inc., undated. December 7.2005 Page 1 1 of 50 Preliminarv Enaineerina Reoort - Town of Gabbs Seweraae Svstem
December 7,2005 Page 12 of 50 Preliminarv Enaineerina Reaort - Town of Gabbs Seweraae Svstem
TOP OF BERM EL= 4555.8 8" PIPE OUTLET WEIR, PRlblAAY POND WATER ELEV, = 4533.61 EVAWRATION POHD i ~JY, 14 ; \ fl 8- PI I WATER €LEV. = 4529.2 .-, ,/ 7; 5;- :3' \ 5' I D.&*~ L2oS-l SECTION A-A NOT TO SCALE
BOmOM POND €LEY. = 452S.01
ORKifNAL 01VlDIN& LEVEE , PRIMARY POND @.-*Z-m -14
AS-BUILT DRAWING SECTION B-B MQDlFtED PUN= NOT TO SEALE Drawlng f of 2
The headwork consist of a bar screen, meter vault and an eight-inch Palmer-Boilis flume coupled with a Chanflow ultrasonic level and flow measuring device installed in April 6, 2001. The depth to groundwater table in the vicinity is 198 feet (elevation 4,620 feet) below ground surface4. Groundwater monitoring at this facility are not required under the current groundwater discharge permit due to considerations such as the small population, depth to groundwater, and lack of potable groundwater resources in the vicinity of the treatment faci lity5. Two irrigation valves split the flow from the headworks to Pond # Iand /or 2. There is no sign of potential surface runoff into the Ponds.
3. RECENT POND MODIFICATIONS
Nevada Groundwater Discharge Permit Application (NEV70021) April 26,2002, page 2 of 3. 5 Nevada Division of Environmental Protection Fact Sheet (pursuant to NAC 445 A.236), Page 2 of 4: Receiving Water Characteristics, October 9, 2002. December 7,2005 Page 13 of 50 Preliminarv Enaineerina Re~ort- Town of Gabbs Seweraae Svstem
As shown on Drawings Iand 2, the levee in Pond # 1 was modified to a full 6 feet high dike on April 1, 2003, decreasing its retention capacity to one-half so the required depth in the oxidation compartment (Pond # 1A) could be maintained at three to five feet. The dike contains a transfer pipe to the isolated half of Pond #I (#I B) and then to Pond # 4. Ponds # 2, 3, 4, 5 and 6 are all interconnected with transfer pipes for use as required. O&M manual was revised accordingly on April 14, 2003 submitted to NDEP on December 2, 2003 and approved on January 30,2004. The dike in Pond #lA did not produced the desired water depth of three to five feet for optimum treatment efficiency in warm weather and as a result and at the verbal advice of Circuit Rider, Pond #lA was further divided into two equal compartments - Ponds # 1A-0 and 1A-E (each has 28,570 square feet of measured water surface area at a water depth of 5 feet). The average retention time of the primary Pond # 1A-0, based on an average flow of 20,700 gallons per day (recorded between January 2004 and September 2005) is approximately 52 days. This falls favorably within the suggested range6 between 30 and 80 days. Effluent from the primary pond exits via an overflow weir set at 5-foot level in an effluent chamber in the dividing dike. The second additional modification took place in February 2004 and was without NDEP's written approvallpermit.
3.1 Materials Used to Construct the Ponds .I Existing Ponds The original three facultative ponds, built between 1969 and 1975 are believed to have been constructed or prepared with clayeyfsilt material of low to moderately low permeability7.This assumption is further validated by recent soil sampling of native material from existing stockpile on site. Soil sample was compacted to 95% of ASTM D698 near optimum moisture content, remolded in accordance with ASTM D698 and tested for hydraulic conductivity in accordance with ASTM D5084, Falling Head- Rising Tail at 2 and 5-psi effective pressures. Test indicates the native material is of native silty clay or clay material with moderately low to very low permeability (1.66 XI0-6 to I.86 x Io'~ crnl~ec)~. AMEC' concluded that based on their experience, the required, low permeability for pond lining (1 X cmlsec) would probably be achieved at higher, remolded moisture content (above optimum) andlor greater percent relative compaction.
.2 New and Modified Dikes While no lining was used to for intermediate dikes in Pond #I(these dikes were built with magnesite tailings having an average permeability of 7.98 x 10' cm/sec,
TFS-38, US EPA Onsite Wastewater Treatment Systems, Technology Fact Sheet 7, Stabilization Ponds, FWS Constructed Wetland, and Other Aquatic Systems. 7 NEV70021(1986-1991) March 20, 1986 Fact Sheet makes reference to O&M manuals which states that the pond bottoms were prepared to prevent excessive percolation. 8 Exhibit # 1 - Permeability as tested by AMEC Exhibit # 2 - Permeability as tested by AMEC December 7, 2005 Page 14 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
equivalent to a mix of silty sand and grave^)"^, these dikes are inside an originally engineered and constructed pond. There are no signs of leakage through these dikes, nor any erosion. Should there be any leakage discovered in the future, the leakage will occur in Pond # 1 B, which is still confined within the original Pond #I having an average permeability between 1.66 x10" to 1.86 x 1o-~ crnlsec. For comparison purposes Table 2 represents the typical permeability of various types of soil. Table 2 - Typical Permeability of Soil, cm/sec" Clean gravel Clean sand {Coarse) (Medium) (Flne) Silty sand & gravel Silty sand Sandy clay Silty clay Clay Colloidal clay
4. Pond Evaporation and Percolation
4.1 Evapo-Transpiration The original design document shows an average annual evaporation of 62 inches or 4.83 x ~0-~cm/sec,and a maximum month evaporation of 138 inches or 3.2 x cmlsec in warm weather monthsf2. More recent research on potential evapo-transpiration (PET) shows the calculated PET to be 1,225 mm or 49.4 inches per yearf3.
4.2 Pond Permeability The facultative (Pond # IA-0) has a 28,570 square-foot (at 5 feet deep) measured water surface area based on as-constructed survey. Bucket measurements in October 2005 at the effluenUoverflow chamber between primary treatment Pond # 1A-0 and evaporation Pond # 1A-E show an overflow of 14,000 gallons per day from primary to second pond and therefore a water loss of approximately 6,420 gallons per day (858 cubic feet) within
loExhibit #3 - Permeability as tested by AMEC " The Asphalt Institute, Soils Manual, 2nded., College Park, New York, 1963
I*As-built drawings by William F. Pillsbury. Inc., May 19, 1975 for North Gabbs Wastewater Collection and Treatment Facilities, Sheet 2 of 15.
l3Exhibit #4 - Figure 21-Contour map ofcalculated, annual PET for the state ofNevada, NEVADA BUREAU OF MINES AND GEOLOGY REPORT 48, STATEWIDE POTENTIAL EVAPOTWNSPIRATION MAPS FOR NEVADA 1996 by Lisa Shevenell
December 7. 2005 Page 15 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
the primary pond. This loss can only be attributed to infiltration through permeability of the soil and evapotranspiration of pond surface and vegetation. The PET in Gabbs area for the month of October is 60 mm (Table 3). Total Influent = 2,729.8 cubic feevday Total Effluent = 1,871.0 cubic feet/day Total water loss = 858.0 cubic feettday Evaporation = 187.5 cubic feetlday Percolation = 670.5 cubic feet/day This translates to a net equivalent pond permeability of 8.28 X I0-6 cmlsec in Ponds #lA-0 and IAE.
Table 3 - Gabbs Monthly Potential Evapotranspiration (1,255 mm per year)
Jan Feb Mar Aprl May June July Sep Oct Nov Dec Month
4.3 Projected Percolation Rate A pond that meets NDEP WTS-5 minimum requirement may consist of one-foot clay lining of Ix lo-' cmlsec, and have a maximum allowable water table of 4 ft below the ground levelf4.If the native soil is of fine and medium sandf5,the calculated traveling time of pond water from surface to groundwater table is approximately 139.4 days.
14 Ten States Requirements -1 997 Edition, Chapter 90, 93.22 December 7,2005 Page 16 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
Assuming Pond # IA-0 were prepared with one equivalent foot of silty clay (calculated net equivalent pond permeability is 8.28 x 10~~rnlsec)'~,the traveling time of pond water from surface to roundwater table, at a depth of 198 feet, can be anywhere between 118 days (silty sand W ) and 19.1 years (silty clayf8). If the soil strata consist of range of grain sizes from clean gravel to silty clay and evenly and randomly distributed, the calculated time for pond water to travel from ground surface to the ground water table is 28.7 yearsfg. The above comparisons demonstrate that pond water reaching ground water table in the case of Gabbs should be expected to be low to almost non-existent. This can be further validated by obtaining more soil samples through test bore holes in the future, at the time when further improvement are made to the existing ponds, or from the drilling a ground water monitoring well.
5. Existing Conditions
5.1 Raw Sewage BOD5 Concentration Table 3 depicts the BOD5 concentration of influent in most recent three years.
Table 4 - Average BOD5 Concentration of Influent -2003 -2004 -2005 Mar 130 ~300 40
June . 23 130 71 Sept 89 170 20 Dec 120 54 Average 91 118& 44 This translates to an average BODSraw sewage strength of 118 mg/L and a sample peak of 170 mg/L for year 2004. It is also noted that the average BOD5 for 2005 samples is 44 mg/L with a sample peak of 71 mg/L. The three-year average BOD5 is 100 mg/L.
5.2 Current BODs Loading
l5Permeability of Fine and Median Sand = 0.004 to 0.15 cmlsec
l6Refer to Pond Permeability discussed in 4.03. 17 Permeability of Silty Sand = 1x10"to 1x104cm/sec. 18 Permeability of Silty Clay = 1x1O4 cmlsec
l9Total time of travel, days = 198 x 8"' x 30.48 x 86,400-' x ~(permeability"') 20 The BODs of sample taken on March 2004 is highly abnormal (>300 mglL), most likely due to grab sample containing above normal amount of high organic solids at the flume (e.g. large clumps of feces or solids), and should therefore be excluded from averaging. December 7,2005 Page 17 of 50 Preliminarv Enaineerina Re~ort- Town of Gabbs Seweraae Svstem
The as-constructed survey of the modified pond shows the primary Pond #1A-0 (at a water depth of 5 feet) to have a measured water surface area of 28,570 square-feet or 0.6559 acre. The water level has been maintained at this level by an overflow weir since the beginning of 2005. The three-year average BOD5 is 84 mg1L. For conservative approach, we use 118 mg/L as the representative BODS. Daily average flow (see Table 1) is19,700 gallons based on a three-year average, which is conservative since the 2005 records show an average flow of 16,000 to 18,000 gallons per day.
The average BODs loading is estimated as follows: BOD5 Loading: (Flow, MGD) x (BOD5, mg/L) x (8.34) / (Pond Area, acres) = (0.0197 x 118 x 8.34 I0.6559) = 29.6 Ibs of BODsIdayJacre
This loading is well within the NDEP WS-5 criteria of 35 Ibs BODSIdayJacre for facultative ponds operating above baseline elevation of 3,000 ft. above sea level. Discussion with the operator, Mr. Mark Kaminski of NDEP and several personal visitation of the site in 2005 confirm that the primary pond has been functioning exceedingly well, with no signs of odor or excessive growth of algae and aquatic plants.
5.3 Plant PerformanceJEffluent Quality Table 5 depicts the BOD5 and TSS concentration of primary effluent in 2004 and 2005. Visual appearance of effluent in October was clear and colorless since the completion of the pond modification in 2005. The primary pond color is dark sparkling clean with wild ducks swimming in the pond at the time of visual inspection. The evaporation/percolation pond 1A-E, which draws water three feet from the bottom of the primary pond (below the algae level), has approximately 6 inches of water.
December 7,2005 Page 18 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
Table 5 - Primary Pond Effluent Quality, 2005
Monitored Period ma/L TSS, mq/L Jan - March 27 April - June 42 July - September 20
The above records compare favorably and rate well below NDEP'S secondary-treatment standards for pond effluent of 45 mg/L BOD5 daily maximum, and 90 mg/L Total Suspended Solids (TSS).
5.4 Weeds and Aquatic Plant Vegetation remains abundant around the side slope of the djkss (built with magnesite tailings having an average permeability of 7.98 x 10" cmlsec) and in the evaporation pond. While rooted plant helps increase evapotranspiration, excessive vegetation may be a safety issues such as reduced accessibility to pond area for emergency and maintenance. Heavy weeds at the floor of the secondary pond provide nesting places for animals and mosquito. Burning had been used to remove excessive vegetation and weeds.
21 2005 readings are CBOD5 and not BOD5,The correlation between the two has not been established although it is believed that BOD5 of low concentration domestic raw sewage should either be the same as CBOD5,or marginally higher. December 7,2005 Page 19 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
CHAPTER 5 - System Deficiencies
1, Collection System
1.1 Sewers All wastewater influent is received via gravity flow to a distribution box at the treatment facility. The 'system has approximately 23,400 linear feet of pipe, 80 manholes, 6 dead end cleanouts and 130 active service connections. Cursory inspection shows calcite buildups on concrete wall and incomplete or deteriorated benching in manholes. There is no record of excessive exfiltration due to cracks, dislocated pipe joint and broken sewer pipes at this time to support the any claim as reasons for low sewage flow. Such claim will have to be supported by closed captioned television inspection of the entire 23,400 linear feet of sewer pipe.
I.2 Headwork Decaying plywood that needs replacement covers the eight-inch Palmer-Bowlus Flume meter vault. It may be advisable to have the detector and bar screen adequately covered against vandalism. The recorder house was vandalized once in recent years. Records shows consistent readings however, a recalibration will likely be able to dismiss the concern of NDEP*~as to why high fluctuation in potable water consumption has no influence on the rate of plant influent as discussed earlier in Chapter 3.
2. Treatment System
The current treatment train as shown in the following schematic, consists of a facultative lagoon cell (#lA-0) followed by an evaporation cell (#lA-E). Inflow #1A-0 cell Oxidation
/ Overflow #I6 Chamber Not used
MA-0 cell Evapotranspiration
2.1 Primary Cell .I Lack of System Security
22 Page 2, NDEP Compliance Evaluation Report, November 8,2005. December 7.2005 Paae 20 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
Currently, only one primary pond exists. This is an operational risk that can too often lead non-compliance when the pond fails to perform and the operator is unable to divert the flow to a second pond. Normally, a small system such as Gabbs should have at least two primary cells working either in parallel or in series mode followed by a polishing or evaporation cell. Both parallel and series modes can be incorporated in a system as shown in the following schematic. A two primary ponds system will facilitate sludge removal (every 20 years) in primary pond and flexibility to accommodate high fluctuation in flow and organic loading. The ponds produce Ito 2 tons of sludge per year. .z Parallel and Series Modes of Operation The original design of Gabbs system accommodates both parallel and series mode of operation. Parallel mode works well for high loading condition to reduce hydraulic and organic overload. Series mode provides long detention times and good algae removal and is most effective under low loading condition such as Gabbs. .3 FinaltPolishing or Evaporation Cell The limited microbial activity following two primary cells in a series, or two parallel primary cells with long detention time (longer detention time is needed in the winter) (This may require cells to have very low permeability) results in a lack of released nutrients that limits algae growth and reduces TSS in the final discharge. Polishing cell should have a loading no more than 15 Ibs BOD5 per acre per day and depth no
less than 2 to 3 feet. The existing cell has only 6 inches of water. , The schematic below represents the desirable number of ponds (see Constructed Wetlands below).
A Primary 4 v Inflow (Constructed Cell 1 _-l- ----, Wetlands) b " ----
0 = Control -----fl ------Polishing or Evaporation Cell Primary Cell 2
.4 Constructed Wet Lands - Alternative to Polishing/Evaporation Cell One of the most promising algal removal methods, suitable for all lagoon systems but especially appropriate for smaller system such as Gabbs, is the use of a constructed wetlands in place of the final polishing cell.
December 7,2005 Page 21 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
The constructed wetlands can be a system with media selected to maximize algal removal and allow its biodegradation. This could be readily placed within the existing Pond #IB. Once operating, little or no operation and maintenance should be expected. The best design utilized 54 in gravel and five-day detention time. This wetland can remove more than 90% of the algae with no plugging or accumulation of algae, even in cold Nevada wintertime climate (Incline illa age)'^, and can be educational, innovative and environmental friendly. Examples of Constructed Wetlands
23 Example: Incline Village, Nevada, Constructed Wetlands for Wastewater Treatment and Wildlife Habitat - 17 Case Studies EPA832-R-93-005 September 1993. December 7,2005 Page 22 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System -
Wetlands Ecosystem
More examples and pictures of constructed wetlands can be found in Exhibit 5 of this ~eport~~. Currently the water depth in the evaporation pond is approximately 6 inches. This depth is not sufficient to sustain a healthy environment for cattail, bulrush, water hyacinth, submerged plant and duckweed (duckweed reduces algal grow) that are essential plant lives for wetlands. If the water level is maintained at two to 4 feet, small fish can be introduced which can eat midge and mosquito larvae to help keep the marsh free of nuisance insects.
3. MISCELLANEOUS DEFICIENCIES
The following deficiencies have been recorded in various compliance inspection reports.
3.1 Flow Meter and Recorder Need Recalibration
24 Exhibit 5, some pictures of 17 Wetlands Case Studies, EPA832-R-93-005 September 1993 December 7, 2005 Page 23 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
NDEP staff believes that it may need recalibration because it does not seem to correlate with water consumption record.
3.2 Unmarked Staff Gauge Staff unmarked with reading is not acceptable as inspectors and persons other the operator may need to know the water depth.
3.3 Dry sludge remaining in pond #2. The material needs to be cleaned, or tested for suitability for use as landscaping or soil cover on site since it has been decomposed there for years after the pond was decommissioned.
3.4 Overgrown weeds and vegetation Weeds on the slopes need to be cut down. Rooted plant should be trimmed to maximum 3 feet high during warmer month to reduce windbreak effect on pond surface.
3.5 Lack of Pond Lining NDEP recommends 60 mil HDPE lining for primary ponds to bring in accordance with VVTS-5 Guidelines. While there is no immediate need for lining the currently active pond, lining of pond with clay or HDPE should be considered when additional primary pond is planned. New soil stabilization products that cultivate enzymes to fill voids and create bonds between soil particles should also be considered in detail design of expanded or new cells2!
3.6 Steep Slopes on Internal Dikes The dike between Pond #lA-0 and 1A-E is measured to be 2.65 to I,and between A-E and IB is 2.9 to I. It is desirable to reduce the 2.65 to 1 slope to 3 to1 if motorized weed cutter is to be used on the slope.
25 GDER PZ22X - Biological Stabilization1 Fixation Enzyme for Roads, Wastes, Ponds and Lagoons by Global Development & Environmental Resources, Inc. December 7,2005 Page 24 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System 1 I
CHAPTER 6 = OPERATION AND MAINTENANCE
I. OPERATING AND MAINTENANCE MANUAL
Utility Services Inc. of Sparks, NV prepared a Wastewater Treatment Facility Operations & Maintenance Manual for the City of Gabbs (Manual). The exact date of issuance is unknown but is before 1986. It is a comprehensive Manual with instructions, description of facilities, problems and solution and other guidelines necessary for the proper maintenance and operation Gabbs current wastewater system. History of maintenance and change in operating personnel is beyond the scope of this Report but can be researched through NDEP's archives of written communications when needed. There was a very minor update to the Manual by the current operator in April 2003. This update is the result of addition of a flow meter, the level indicator in the primary pond and Pond # 1 first modification (first dike to divide Pond #Iinto IAand 1B).
2. CURRENT MODE OF O&M
2.1 Duties of the Operator The current operator does all of the maintenance and operation, alone with no help in most cases of the following works: Approximately 23,400 linear feet of pipe 80 manholes, 6 dead-end cleanouts 130 active service connections. Headworks including a manual bar screen, an eight-in Palmer-Bowlus Flume and a CHAFLO Open Channel Flow Meter with a recorder in enclosed station. One facultative sewage lagoon and one evaporation pond.
2.2 Sewer System As discussed earlier in Chapter 2, operation and maintenance of the sewer collection system has been more in corrective than preventive mode. Records do not reflect the frequency or incident of cleaning such as rodding, balling or jetting.
2.3 Treatment Plant With respect to the Treatment Facility, records show Ponds #lA-0 and 1A-E have been well maintained in accordance with the Manual, and plant performance is being monitored regularly by NDEP. History of sewage flow, BOD5 and TSS sampling results, repairs and corrective actions are documented throughout the time of permit renewals, with the exception of Pond #Imodification, which was inadvertently done in 2004 at the
December 7,2005 Page 25 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
suggestion of the circuit rider, and was without proper engineering design and the approval of NDEP.
3. DESIRABLE MODE OF O&M
The operator should follow closely with the procedures and practices described in the Manual. Addition part-time help will be needed to carry out many functions such as entering confined spaces and operating heavy equipment. It is envisage that training will be required for the additional staff to become a Class I operator, for future succession as the current operator retires. Reports, testing results, work orders and diaries of repairs, corrective actions and emergency responses should be properly documented with copies forwarded to the immediate supervisor.
3.1 Preventive Maintenance A preventive maintenance schedule and capital improvement plan should be created for the sewer system for regular inspection and timely correction, and for budgeting money for infrastructure improvement and life cycle replacements.
3.2 Effluent Quality Monitoring As the quality of treated eftluent is of prime importance with respect to minimizing impact on ground water, it may be advisable to train the operator to perform additional water quality monitoring on a more frequent intervals. Frequent flow monitoring, field observation and testing with potable field devices such as turbidimeter, pH meter, dissolved oxygen meter, and colorimeter can help operator control algal growth, fine tune mode of plant operation to improve treatment efficiency and improve quality of treat effluent.
3.3 Effluent and Discharge Control With respect to the evaporation pond, any noxious weeds should be removed and replaced with vegetation conducive to constructed wetlands environment. This will enable us to test the suitability of constructed wetlands. Minor modifications or "pond-scapes" may be necessary to create a more suitable environment for a demonstration project.
December 7, 2005 Page 26 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
CHAPTER 7 - PROPOSED SYSTEM IMPROVEMENTS
I.COLLECTION SYSTEM
The following is proposed:
I.I Closed Captioned Television lnspection This will be for the entire 23,400 linear feet of sewer and if possible 130 service connections. CCTV will determine the pipe condition of the 30 years old system and determine the need for removal of debris and calcite buildups, elimination of infiltration or exfiltration, structural repairs, pipe replacement and reconstruction.
1.2 Field lnspection of Appurtenances This includes all 80 manholes, 6 dead-end cleanouts 130 active service connections. Dye or smoke test may be necessary to determine cross connection of storm and surface water to the sanitary system.
1.3 Life Cycle Replacement Plan / Capital Improvement Plan Upon completion of CCNand field inspection a need assessment will be done to develop a capital improvement/life cycle replacement plan for the entire collection system.
2. TREATMENT SYSTEM
The following is proposed:
2.1 Immediate Corrective Actions .I Mark Staff Gauge .2 Cut weeds and Vegetation in Ponds IAand 1B .3 Reduce Steep Embankmenttslope of Dike.
.4 Dispose of Dry Sludge in Cell #2 .5 Replace Plywood Cover for Meter Chamber
2.2 System Improvements .I New Primary Cell Modify Pond #lA-E to become a primary cell (lined). This doubles the load factor of the current cell (Flow x BOD5.), thus providing much flexibility in optimizing treatment efficiency. BOD5 Loading: (Flow, MGD) x (BOD5, mg/L) x (8.34) 1 (Pond Area, acres)
= 14.2 Ibs of BODddayIacre December 7, 2005 Page 27 of 50 Preliminarv Enaineerina Reeort - Town of Gabbs Seweraae Svstem
.2 New Polishing Cell and/or Wetlands Modify Pond #I8 to become a polishing pond (partially lined) andlor wetlands. Due to loss of water experience in the past, it may be necessary to install a partition dike to create a partially lined polishing cell. The remaining part can be used for constructed wetlands as a demonstration project. This constructed wetlands will include trail and observation point for demonstration and educational purposes. For conservative cost estimate, both the polishing pond and constructed wetlands are proposed.
3. ESTIMATED COST OF IMPROVEMENTS
The following table depicts the estimated cost of proposed system improvement
3.1 Collection systemz6
Description -Unit Quantitv Unit Price 1 Mobilization and Demobilization I.s. 15% 2 Sewers: 3 Closed Captioned Television Inspection Assessment Report 4 Sewer Repair Pressure grouting Cleaning (pressure jetting) 5 Lateral Repairs 6 Manholes: Manhole Inspections Assessment Report Repairs 7 Engineering and Contingencies: Total Sewer Improvements
'"he above assumes 10% to 25% of the system requires some degree of repair and cleaning. This estimate may change depending on the result of the CCTV and detailed field inspection. Smoke or dye test to detect cross connection of lateral services is not expected to be needed and such cost is therefore not included. December 7,2005 Page 28 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System b.
3.2 Treatment: System Description Quantity Unit Price Total I Mobilization and Demobilization I.s. 15% $ 36,799 2 New Primary Cell Sludge Removal Earthwork Fine grading Cell Liner Yard piping Control chamber 3 Reline Existing Primary Cell Sludge Removal Fine Grading Pond Liner 4 New Evaporation pond2' New Dike Outflow Control ChamberISampling Well I.s. 5 Constructed Wetlands Earthwork Fine grading Open Water pool2' Riprap s.y. %" stone c. y. Riparianlnatural channels 1.f. Plantinglvegetation I.s. Irrigation Gridlines I.s. Demonstration IObservation Points I.s. 6 Contingencies 7 Engineering and Administration Total Treatment System Improvements
27 Assume pond is significantly small, and liner is not required and instead the open water pool will be lined.
28 Including liner December 7,2005 Page 29 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
3.3 Proposed Schedule of Works Subject to the availability of funding, we propose to commence CCTV and detail inspection of the Collection System no later than 2007; and of the Treatment System no later than 2008. The design of the new cell and constructed wetlands should be completed no later than mid 2007.
December 7, 2005 Page 30 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
CHAPTER 8 - RATE STRUCTURE AND FUNDING NEEDS
1. EXISTING RATEIFEE STRUCTURE VS REVENUEIEXPENDITURE
Gabbs Water System and Sewer System Rate Structure, as shown below have not changed significantly since the last rate increase in 2001. This rate must be adjusted on a fixed regular basis, preferably annually using consumer price index to reflect inflation.
Water and Sewer Rates Project Revenue and Expenditure Water Sewer Revenue ~xpenditure" System System Water Sewer Water Sewer Number of customers 134 130 $1 05,802 $1 I,439 $48,936 $40,038 Ave. monthly 206,000 21,000 residential usage gal gal Current rates, monthly $62.00 $6.40 per residential dwelling/connection Charge to connect to $250.00 $250.00 system Ave. monthly cost per $62.00 $6.40 customer Date of last rate 3/5/01 31510 I change Amount of last rate 22.00 0.40 change
2. PROJECTED NET REVENUE / RESERVE
As discussed earlier, the current mode of O&M lacks preventive maintenance. While the projected revenue for the combined water and sewer services appears to yield a net reserve of approximately $28,400 per year ($1 17,350 - $88,970), or 24% of accrual, we suggest at least 15% should go to operation and maintenance. The projected, combined net revenue/reserve should therefore be:
29 Obtained from Nye County Gabbs Approved Budget for fiscal year 2005-2006 and auditors 2004 report. December 7,2005 Page 31 of 50 Preliminarv Enaineerina Re~ort- Town of Gabbs Seweraae Svstem
Based on 55% and 45% O&M budget expenditure for water and sewer respectively, the Annual RevenueIReserve for Sewer should be: $21,120 x 45% = $10,850
3. AFFORDABILITY OF PROPOSED SYSTEM IMPROVEMENT
3.1 Assumptions The result of CCN and detail inspection of the collection system may change cost estimate for the improvement work. Cost to County is based on 80% grant and 20% matching fund. 45 % of the current combined water and sewer fund reserve can be used to partially fund the improvement project.
3.2 Life Cycle Replacement cost3' Sewer system ($970,000 x 35% / 30 year) Treatment System ($400,000 x 35% / 30 year) Annual reserve fund needed
3.3 Grant Needed. Total Revenue (water & sewer) Available Matching Fund from reserve3'
Less: Cost of O&M (water & sewer) Reserve for sewer Reserve for water Less Cost of Improvement Amount of Grant Needed (Approximately 95.9%)
3.4 Funding Alternative Should it becomes difficult or not possible to obtain all of the 95.9% of the improvement cost from grant, it may be necessary to increase the sewer use-rate to cover the difference.. The following table shows the various scenarios of rate increase Vs the amount of grant obtained, based on a 6% interest and 25-years term loan. If the amount of grant is 50%, the sewer use-rate will be $1 9.64, an increase of $13.24 per month.
30 Grant needed for future life cycle replacement = $1,096,000, assuming 35% matching fund from reserve. 31 Net reserve as cash today for Gabbs sewer fund. December 7,2005 Page 32 of 50 Preliminarv Enaineerina Rersort - Town of Gabbs Seweraae Svstem
32 Current Sewer use-rate is $6.40 per month December 7, 2005 Page 33 of 50 Preliminary- Engineering Report - Town of Gabbs Sewerage System
Grant Vs Sewer Use-Rate
4. RATE ADJUSTMENTS FOR INFLATION
The above are present values. Rate charge for sewer and water services must be adjusted annually for inflation.
December 7,2005 Page 34 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
Exhibits 1-5
December 7,2005 Page 35 of 50 Preliminarv Enaineerina Reoort - Town of Gabbs Seweraae Svstem
Exhibit I- I14
PROJECT: .I08 NO: 5419W0620 CLIENT: LAB NO: S-5873 MATERIk DATE SAMPLED: 0711 WOffi SAMPLE SOURCE: Pond No. 6. Gm.Nevada S.4MPLED BY: Client
SAMPLE PREPARATION: Remolded
METHOD OF COMPACTION: Remolded in 4 lifts to 90% WmpaCliOt7 per ASTM D6S8
TESTING METHOD: Method F: Constant Volume Failing Head (by Mercury) Rising Taiiwater
FIELD MOISTURE: NA LAB MOISTURE: INITIAL DIAMETER (cm): 7.1 5 FINAL DIAMETER INITIAL LENGW (om); 7.58 FINAL LENGM INITIAL MOISTURE CWENT (%I: 24.3 FINAL MOISTURE CONTENT (5):
CONSCLIDATED?O: 'f EFFECTIVE PRESSURE (pol): 2 CELL PRESSURE (psi): 50 POST CONSOLIDATION DIAMETER (om): 7.48 BACKPRESSURE NO: 48 POST CONSOLIDATION LENGTH (crn): 7.93
INITIAL DRY BULK DENBTY (IW* 86.5 %OF 0698 COMPACTION: 90.1 FINAL DRY BULK DENSITY (lb'lt?' 87.1
FINAL6 PARAMETER READING: 0.96 FINAL BACKPRESSURE (psl): 48
AVERAGE &'(cmls): 1.66E-06 AVERAGE (may): 4.701-03
MAXIMUM GRADIENT USED: 21 .el MINIMUM GRADIENT USED: 8.41
'Corrected to 2a eC ""N.B.: All final sample dimensions are subject to sample deformation caused by exsolution of --Hz=-f '. n pore waler 5 Michael P. Hawe, C.E.T. Norm Davis Laboratory Supervisor Manager, Materials Department
December 7,2005 Page 36 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
Exhibit 1 - 214
PUOJECf: JOB Na 5+13000620 CLIEM: 4AB NO: S-5873 MATEUAL: DATE SAMPLED: 07/12/2005 SAMPLE SWRCE: Pod No. 6. Gab, Nevada SAMPLED BY: Client
U~rtlmantot Hydraullo Conduoclvlty of Saturated Porows Malnrlals Uslng a FkxJbln Wall Pnrmearnatlr (ASTM 05084)
SAMPLE PREPARATION: Remolded
METHOD OF COMPACTION: Remolded in 4 lfts to 95% compaction per ASTM 0698
TESTINGMETHOD: Method F: Constant Volume Falling Head (by Mercury) Rising Tailwater
FIELD MOISTURE: NA LAB MOISTURE: INITIAL DIAMETER (cm): 7.15 FINAL DIAMETER INITIAL LENGTH fcm): 7.11 FINAL LENGTH INITIAL MOISTURE CONTENT (%): 23.8 FlNAL MOISTURE CONTENT (%I: 31.6
CONSOllOATED?(YN): Y EFFECTIVE PRESSURE (psi): 5 CELL PRESSURE (psi): 50 POST CONSOLIDATION DIAMETER (cm): 7.32 BACKPRESSURE bi): 45 POST CONSOLIDATION LENGTH (cm): 7.29
INITIAL DRY BULK DENSITY (lid*): 92.8 %OF D698 COMPACTION: 96.7 FlNAL DRY BULK DENSITY (lid@): 89.7
FINAL B PARAMETER READING: 0.1 FINAL BACKPRESSURE (psi):
AVERAGE kt' (C~S): 1.@BE-Of AVERAQE k'(WdVdny: 5.27E-04
MAXIMUM GRADIENT USED: 21.71 MINIMUM GRADIENT USED: 18.1 2
*Corrected to 20 "C **N.B.: All final sample dimensions are subject to sample deformation caused by exsolution d
L Michael P. Hawe, C.E.T. Norm Davis Laboratory Supervisor Manager, Materials Department
December 7,2005 Page 37 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System
Exhibit 1 - 314
PROJECT: JOB NO: YIW006a[l CUEHR UENo: s.5573 MATERIAL: DATE SAMPLED; O7!1 ZrW5 SAMPLE SOURCE: WPtEO BY; CLhi
SAMPLE PREPARATION: R6moW
METWOF COMPACTION: RWlldded ill 4 If& kI b% WlT!pdW prASW D688
TESTING MEW:Method F: Constant Vdun~rrFalling Head @y Rllermy) Rising Tailwater
FWMOISTURE: NA LABMOISTWIE NA INITIAL MAWEER (cm): 7.15 EIWL DIAMETER 7.f 8 INITIAL LENGTH (om]: 7.58 RNAL LEMTH 7.46 lNlWWISTURE CONTENTWI): 24.3
CONSOUDATEW lYM): Y EFFECTIVE PRESSURE RfO: 6 GSLL PRESSURE @I): !% POST CONSOLlD4TION DIAMETER @m): 7.46 WWRES3uRE @sL): 45 mST CONSOLIDATION LENGTH (mom): 7.93
IMTiAL DRY BULK OENSlN jblll? 86.5 % OF OW8 COMPACTION: m.1 FIN% DRY BLILKDWSITY 1W& 87-1
FINAL BACKPRESSURE @O: 45
AVERAGE b*(Icrtlly): 4.53E.43
MWIAdWMAUEhlT USED: 21.61 XjlNlMUMQRADIWT USED: 8.41
'Ccxrected 20 20 S; '"N.B.: ,411 final sample dimensions ate subject b sample debimation cawed by exsolution of
& Niiael P. Hwve, C.E.T. Mom Dads Lahatory SvpewMr Manager, MawrW Department
S>Wm!mkb OSslf1\82Q 60ntwS-587S9J87590% W.l
December 7, 2005 Page 38 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System L.- L.- -
Exhibit 1 - 414
PROJECT: JW NO: 5419000620 CLIENT: LAB NO: 5-5873 MATEAUL: DATE SAMPLED: 0711212005 SAMPLE SOURCE; PodNo. 6, Gab. Nevada SAMPLED BY: Client
Measurenrenl of Hydmlio Conduollvhy d Saturatd Pomw lJaterblsklng a Flexible Wall Permeamtar (ASTM 05084)
SAMPLE PREPARATION: Remolded
METHOD OF COMPACTION: Remolded in 4 lifts to 95% compaction per ASTM D698
TESTING METHOD: Method F: Constant Volume Falling Head (by Mercury) Rising Tailwater
FIELD MOISTURE: LAB MOISTURE: NA INITIAL OIAMETER (cm): FlNAL DIAMETER 7.24 INITIAL LENGTH (om): FINAL LENGTH 7.1 7 INITIAL MOISTURE CONTENT (%I: FlNAL MOISTURE CONTENT (%I:
CONSOLIDATED? WN): Y EFFECTIVE PRESSURE (pi): 2 CELLPRESSURE(pi): 50 POST CONSOLIDATION DIAMETER (m): 7.32 BACKPRESSURE @si): 48 POST CONSOLIDATION LENGTH (cm): 7.B
INITIAL DRY BULK ~€~~lW(lbYtq92.8 % cf Dm CCMPACTION: 96.7 FlNAL DRY BULK DENSITY(I~/~L"~. 89.7
FlNAL B PARAMETER READING: 0.1 FINAL BACKPRESSURE (psq:
AVERAGE kt,*(cWS): 3.42E-07 AVERAGE I&,' (Wday): 9.69E-W
MAXIMUM GRADIENT USED: 21.71 MINIMUM GRADIENT USED: 18.12
"Corrected to 20 OC '"N.B.: All final sample dimensions are subject to sample def~rmationcaused by exsolution of
Mjchael P. Hawe, C.E.T. Norm Davis Laboratory Supervisor Manager, Materials Department Prelirninarv Enaineerina Reeort - Town of Gabbs Sewetaae Svstem
Exhibit 2
October 27, 2005 AMEC Project No. 5-419-000620
Stantee Consulting In&. 6980 Sierra Center Parkway, Suite 100 Reno, Nevada 8951 1
Atttrentlon: Mr. John Anderson
Re: PERMEABILITY TESTING
Dear Mr. Anderson:
The tollowrng test results were conducted uslng a sample supplied to AMEC by Nye County and conducted as per the lnstructlons supplied by Nye County. As per our telephone conversatlon w~thSamson Yao, Nye County the sample was remolded In accordance with ASTM D698 and tested for hydraul~cconductivity in accordance with ASTM 05084, Falling Head-R~singTail.
The sample was compacted ta 90% of ASTM D698 near optimum moisture content, and an additional test was conducted at 95Y' near optlmum moisture content. Both tests were conducted at 2 and 5 psi effective pressures. Based on the initial and final dry densltles, it appears that the Q5% of relative compaction sampfe swelled (under low confining pressures) and lost density. Based on wr experience, the required permeability (1 X cm/sec) would probabty be achieved at a hlgher remolded moisture content (above optimum) andlor a greater percent relative compaction.
Please do not hesitate to contact our office at (775) 331-2375 if you have any questions.
AMEC Earth & Envlronmontal, Ins. ad* Paul Kwlan, P.E. Norm Davis Unit Manager Materials Department Manager
AMEC Earth & Envlmnrnenlal. hc 7BOVi~teBoul~erd.Sulta iDD Sparks. Nrwada USA 8B434-BB58 T~I+ i (ns)331-2375 Fax + 1 (775) 331-4153 wvyw.8mec.cam
December 7, 2005 Page 40 of 50 Preliminary Engineering Report - Town of Gab bs Sewerage System
Exhibit 3 -118
PR W ECT: JOB NO: 541Q000620 CLIENT: LMNO: GBS4 MATERIAL: DATE SAMPLED: 08/28/2005 SAMPLE SOURCE: GBW SAMPLED BY: Client
Meaatremrnt of Hydnullc Conducllvlly of Sduntcd Pamua Materials Using a Flpdbk Wall Pcrmatmelcr (BTM D5084)
SAMPLE PREPARATION: Undisturbed %Ullple
METHOD OF CQMPACTION'
TESTING METHOD: Method C: Falling Head Rising Tailwater
FIELD MOISTURE. NA LAB MOISTURE: INITIAL DIAMETER (crn) 6.07 FINAL DIAMETER INITIAL LENGTH (cm). 6.43 FlNAL LENGTH INITIAL MOISTURE CONTENT (%) 1.7 FINAL MOISTURE CONTENT (%): 1 1.5
CONSOLIDATED7 (YIN). Y EFFECTIVE PRESSURE (psi): 2 CELLPRESSURE (psi): 65 POST CONSOLIDATION DIAMETER (crn): 6.40 BACKPRESSURE (pa): 63 POST CONSOLIDATION LENGTH (cm): 6.80
INITIAL DRY BULK DENSITY (IM",: 136.5 % OF naCOMPACTlON: NA FlNAL DRY BULK DENSITY (lblft",: 136.1
FINAL B PARAMETER READING: 0.96 FINAL BACKPRESSURE (pg:
AVERAGE K,~' (crnlr): 4.26E-04 AVERAGE Lt'(Wdny): 1.21E+00
MAXIMUM GRADIENT USED: MINIMUM GRADIENT USED:
Note: Sample loose in portions. Difficulty in diameter and height measurements.
Corrected to 20 "G "'N.B.: All final sample dimensions are subject to sample deformation caused byex9ution of
L Michael P. Hawe, C.E.T. Norm Davis LaboratorySupervisor Manager, Materials Department
December 7,2005 Page 41 of 50 Prelirninarv Enaineerina Re~ort- Town of Gabbs Seweraae Svstem
Exhibit 3 - 218
PROJECT: JOB NO: 541 8000620 CLIENT: LAB NO: 085-4 MATERIAL: DATE SAMPLED: W/2912005 SAMPLE SOURCE: SAMPLED BY: Client
Measurement af Hydreulic Conduclivlty of Saturated Porous Materials Uslng a FlulbleWall Permearnolor (ASTM 05084)
SAMPLE PREPARATION: Undisturbed Sample
METHOD OF COMPACTION:
TESTING METHOD: Method C: Falling Head Rising Taihvater
FIELD MOISTURE: NA LAB MOISTURE: INITIAL DIAMETER (cm): 6.1 3 FINAL DIAMETER INITIAL LENGTH (cm): 7.42 FINAL LENGTH INITIAL MOISTURE CONTENT (%): 3.8 FINAL MOISTURE CONTENT (%): 120
CONSOLIDATED? (Y/N): Y EFFECTIVE PRESSURE (pi): 2 CELL PRESSURE (pa): 65 POST CONSOLIDATION DIAMETER (om): 6.39 BACKPRESSURE (pst): 63 POST CONSOLIDATION LENGTH (om): 7.76
INITIAL DRY BULK DENSITY (IMP): I 27.1 % OF na COMPACTION: NA FINAL DRY BULK DENSITY (~bm~j: 131-0
FINAL B PAWETER READING: 0.1 FINAL BACKPRESSURE (pi):
AVERAGE L,'(cmls): 1.30E-03 AVERAGE kt'(Rlday): 3.68E+00
MAXIMUM GRADIENT USED: 3.09 MINIMUM GRADIENT USED: 0.52
'Corrected to 20 OC **N.B.: All find sample dimensions are subject to sample deformation caused by exsolutian of
L Michael P. Hawe, C.E.T. Norm Davis Laboratory Supervisor Manager, Materials Department
December 7,2005 Page 42 of 50 Preliminarv Enaineerina Re~ort- Town of Gabbs Seweraae Svstem
Exhibit 3 - 318
PR W ECT: JOB NO: 5419000620 CUENT: LMNO: ms4 MAERIAL: DATE SAMPLED: 09R9R005 SAMRE SOURCE: SAMPLED BY: Clieot
Maaaurcmant of Hydraulic Canductlvlty 01 Saturated Porous Matarlnla Uairrg a Flexlble Wall Permamatar [EMD5084)
SAMPLE PREPARATION: Undisturbed Sample
METHOD OF COMPACTION'
TESTINGMETHOD: Method C: Falling Head Rising Tailwater
FIELD MOISTURE: NA LAB MOISTURE: N A INITIAL DIAMETER (crn): 6.13 FINAL DIAMETER 5.98 INITIAL LENGTH (crn): 7.42 FINAL LENGTH 7.516 INITIAL MOISTURE CONTENT (%): 3.8 FINAL MOISTURE CONTENT (%I: 12.0
CONSOLIDATED?(YIN): Y EFFECTIVE PRESSURE (PI) 5 CELL PRESSURE (psi): 65 POST CONSOLlDATlON DIAMETER (crn): 6.39 BACKPRESSURE (psi): 60 POST CONSOLIDATION LENGTH jcrn): 7.76
INITIAL DRY BULK DENSITY (lb/fta): 127.1 % OF naCOMPACTION: Nh FINAL DRY BULK DENSITY (lblft3): 131.5
FINAL B PARAMETER READING: 0.1 FINAL BACKPRESSURE(PI): 60
AVERAGE Ka* (cWs): 1.54E-03 AVERAGE Kd* (fUday): 4.38E+00
MAXIMUM GRADIENT USED: 3.08 MINIMUM GRADIENT USED: 0.26
"N.B.: All final sampledimensions are subject to sample deformation caused by exsolution of
K Michael P. Hawe, C. E.T. Norm Davis Laboratory Supervisw Manager, Matslials Department Preliminarv Enaineerina Re~ort- Town of Gabbs Seweraae Svstem
Exhibit 3 -4f8
PROJECT JOB NO: FAI~~ZO CLIENT: LAB P10: GES-2 MATERIAL: DATE SAMFED: 09/2@/20E SANPLE SOUACE: SAMPLED Br: Cliat
Measummnt of Hydraulic Canduct[ultyaf Saturatrd Paraur B&Mtlr Ualng a Flafrblr Wall Fernmallut~~(m cE.36084)
%UKE PREPARATION: Undisturbed Sampb
METHOD OF COWIPACTION:
TESTING METHOD: Method C: Falling Head Rising T&iFer&er
FIELD MQ1S'IURE: LAB MOISTURE: tNlTWL DIMETER (m): 6.1 1 AWL DIAMETER IMfIAL LEhQTH (cm): 8.30 FIWLENGTH INITIAL MOISTURE CWEM(%): 1 8,f e CmSJOATED? fl.94). Y EFFECTI'! PRESSURE (EI) 2 CEU PRESSURE @I) 75 POX CCNWLIDATICINIIIAh4ETER $m), 7.07 BACKPRESSURE (p,]: 73 POST COIJSOLIDATIOF: LEWTH 1h;ITlAL DRY BULKCEtJ8r'f (It+??!: 89.6 X 3f na CMPASTION: NA FINAL DRY EULKDENS~TY[l~fl: 90.6 FINAL B PAR.WTER READING: 0.94 FINAL BACKPRESSURE 1~1): AYERASE kb(Wday): b.OgE.01 MAMMUM GRADIENT usm: 2.40 MlNfMUM GPADEM USED: 1.20 How Shrinkage Cracks noted ^Correctedto M C *'N.B.: All final sample dimensbns are subject to sample deformation caussd by exsohrlio?lof 4 Mlchaer P. Hawe, C.E.T. Norm Davk Laboratory Supervisor Manager, Materiats Departmwt Preliminarv Enaineerina Re~ort- Town of Gabbs Sewerage Svstem Exhibit 3 - 518 PROJECT: GB JOE NO: 5419000620 CLIENT: Stantec UB NO: GBS-1 MATERIAL DATE SAMPLED: 09/2012005 SMPLESOURCE: SAMPLED BY: Cllent SAMPLE PREPARATION: Undisturbed Sample METHOD OF COMPACTION: TESTING METHOD: Method C: Falling Head Rising Tailwater FIELD MOISTURE: LAB MOISTURE: INITIAL DIAMETER (cm): FINAL DIAMETER INITIAL LENGTH (om): FINAL LENGTH INITIAL MOISTURE CONTENT (%): FINAL MOISTURE CONTENT (%I: CONSOLIDATED ? (YIN): Y EFFECTIVE PRESSURE (psi): 5 CELL PRESSURE (psi): 70 POST CONSOLIDATION DIAMETER (cm): 7.16 BACKPRESSURE (psi): 65 POST CONSOLIDATION LENGTH (cm): 7.15 INITIAL DRY BULK DENSITY (lMtd]: 86.8 %OF na COMPACTION: NA FINAL DRY BULK DENSITY (IMtJl: 86.8 FlNAL B PARAMETER READING: 0.96 FINAL BACKPRESSURE (psi): AVERAGE &,* (crnls): 1.92E-04 AVERAGE LI'(nldad: 5.45E-01 MAXIMUM GRADIENT USED: MINIMUM GRADIENT USED: Note: Shrinkage Cracks noted. 'Corrected to 20 S: "N.B.: All final sample dimensions are subject to sample defmation caused by exsolution of Michael P. Hawe, C.E.T. Norm Davis Laboratory Supelvisor Manager, Materials Department J:\LaH5419\S419000620-Stanteo\5 psi EPN-5880-EP5ds December 7. 2005 Page 45 of 50 Preliminarv Enaineerina Re~ort- Town of Gabbs Seweraae Svstem Exhibit 3 - 618 PROJECT: JOE NO: 5419000620 CLIENT: LAB NO: CBS-3 MAERIA: DATE SAMPLED: 09/29/2005 SAMPLE SOURCE: SAMPLED BY: Ciient Measuremml ot Hydraulic Cwductivily at Saiurltwl Pwws Matwlsls Using s FlrdbloWall Penno*metor (LSTM 06084) SAMPLE PREPARATION: Undisturbed Sample METHOD OF COMPACTION: TESTINGMETHOD: Method C: Falling Head Rising Tailwater FIELD MOISTURE: Nh LAB MOISTURE: INITIAL DIAMETER [cm): 6.07 FINAL DIAMETER 6.04 INITIAL LENGTH [crn): 6.43 FINAL LENGTH 6.5 INITIAL MOISTURE CONTENT (%): 1.7 FINAL MOISTURE CONTENT (%): 11.5 CONSOLIDATED?(YIN): Y EFFECTIVE PRESSURE (wi): 5 CELL PRSSURE (psi): 65 POST CONSOLIDATION OIAMETER (em): 6.40 BACKPRESSURE (psi): 60 POST CONSOLIDATION LENGTH (ern): 6.80 INITIAL DRY BULK DENSITY (lbAta): 136.5 % OF naCOMPACTION: NA FINAL DRY BULK DENSITY (lbffta): 136.1 FINAL B PARMETER READING: 0.96 FINAL BACKPRESSURE (pi): 60 AVERAGE K,,* (Wdafl: 3JOE+00 MAXIMUM WAOIENT USEO: 3.53 MINIMUM ORAOlENT USED: 0.29 Note: Sample loose in portions. Difficulty in diameter &height measurements. *Corrected to 20 @ **N.B.: All final sample dimensims are subiect to sample deformation caused by exsolution of Michael P. Hawe, C.E.T. Norm Davis Laboratory Supervisor Manager, Materials Depaltment J:\Lab\5419\5419000620-Stantec\5 psi EPE-5662-EP5.Xb December 7,2005 Page 46 of 50 Preliminarv Enaineerina Re~0t-t- Town of Gabbs Seweraae Svstem Exhibit 3 - 718 PR WECT: JOB NO: 541Q000620 CLIENT: LAB NO: GBS-I MATERIAL: DA'ESAMPLED: 0989Q005 SAMPLE SOURCE: SAMPLED BY: Client Measuremorn of Hydraulic Canductivfty of Sdurated Pomua Mmterialr lhilg a Flsdbls Wall Pamuamdor (MTM 05084) SAMPLE PREPARATION: Undisturbed Sample METHOO OF COMPACTION: TESTINGMETHOD: Method C:Falling Head Rising Tailwater FIELD MOISTURE: NA LAB MOISTURE: NA INITIAL DIAMETER (cm): 6. i3 FINAL DIAMETER 6.10 INITIAL LENGTH (cm): 5.86 FINAL LENGTH 5.933 INITIAL MOISTURE CONTENT (%): 15.5 FINAL MOISTURE CONTENT (%I: 35.3 CGNmLIDATED? (YN: Y EFFECTIVE PRESSURE (ps9: 2 CELL PRESSURE (PO: 70 POST CONSOLIDATION DIAMETER (cm): 7.1 6 BACKPRESSURE (psi): 68 POST CONSOLIDATION LENGTH (cm): 7.14 FINNB PARAMETER READING: 0.96 FINAL BACKPRESSURE (pi): 68 AVERAGE l(,r*(cds): 2.63E-04 AVERAGE kt*Cudall: 7.46E-OI MAXIMUM GRADIENT USED: 3.36 MINIMUM GRADIENTUSED: 1.12 Note: Shrinkage Cracks noted. Corrected to 20 4; "N.B. :All final sample dimensions are subject to sample deformation caused by exsolution of Michael P. Hawe, C.E.T. Norm Davis Laboratory Supervisor Manager, Materials Department J:\Lab\5418r5419000620_Stantec\2 psi EP\SS880-EP2.xls December 7,2005 Page 47 of SO Preliminary Engineering Report - Town of Gabbs Sewerage System f Exhibit 3 - 81% PROJECT: JOB NO: 541 9000620 CLIENT: LAB NO: GBS-2 MATERIAL: DATE SAMPLED: W2912005 SAMPLE SOURCE: SAMPLED BY: Client bsuremmt of Hydraulic COndUMlvlly at Saturated Porous Materials Using a Fl~rlblsWdI Portwarmer (MTM ~5084) SAMPE PREPARATION: Unclisturbecl Sample METHOD OF COMPACTION: TESTING METHOD: Method C: Falling Head Rising failwater FIELD MOISTURE: NA LAB MOISTURE: INITIAL DIAMETER (cm): 6.1 1 FINAL DIAMETER INITIAL LENGTH (om): 8.30 FINAL LENGTH INITIAL MOISTURE CONTENT (%): 16.1 FINAL MOISTURE CONTENT (96): CONSOUBATED? (Y/N): 'f EFFECTIVE PRESSURE hi): 5 CEUPRESSURE (psi): 75 POST CONSOUOATION DIAMETER (om): 7.07 MGKPRESSURE @I): 70 POST CONSOLIDATION LENGTH (om): 10.00 INITIAL DRY BULK DENSITY (I&): 69.6 %OF COMPACTION: NA FINAL DRY BULK DENSITY (lblft3): 90.6 FINAL B PARAMETER READING: 0.94 FINAL BACKPRESSURE @i): AVERAGE Kaa* (CWS]: 1 SBE-04 AVERAGE bl=(nuay): 4.50~-01 MAXIMUM GRADIENT USED: MINIMUM GRADIENT USED: Note: Shrinkage Cracks noted. 'Carrected to 20 "C **N.B.: All final sample dimensions are subjeet to sample deformation caused by exsolution of C Michael P. Hawe, C.E.T. Nonn Davis Laboratory Supenisor Manager, Materials Department December 7, 2005 Page 48 of 50 Preliminary Engineering Report - Town of Gabbs Sewerage System I Exhibit 4 December 7,2005 Page 49 of 50 Preliminanr Engineering Re~ort- Town of Gabbs Seweraae Svstem Exhibit 4 December 7,2005 Page 50 of 50 Samson Yao From: Brent Farr [[email protected]] Sent: Monday, February 19,2007 7:40 PM To: [email protected] Subject: Emailing: sewer user rates sewer user rates.xls < Please let me know if there is anything else I can provide you. Thanks , Brent Farr, P.E. Farr West Engineering 5442 Longley Lane, Suite B Reno, Nevada 89511 (775) 851-4788 Main (775) 853-7255 Direct (775) 851-0766 Fax sewer-user-rates Organization Name City Last Update R-Users R-Rates MHI Utilities Inc. Pahrump 12/13/04 688 $23.60 Incline Village GID Incline Village 12/13/04 4000 $18.1 3 69,447 Fernley, City of Fernley 12/4/04 7000 $19.36 44,657 Beatly Water & Sanitation Beatty 12113/04 430 $10.00 41,250 Dayton Utilities - Dayton Dayton 12/4/04 1750 $30.50 44,558 Goldfield Utilities Goldfield 811 9/05 228 $7.00 32,969 Hawthorne Utilities - Hawthorne Hawthorne 1200 $0.99 34,413 Boulder, City of Boulder City 7500 $8.65 50,523 Wells, City of Wells 450 $20.00 35,870 Douglas County - Sierra Shadows/ Genoa Lakes Minden 186 $39.50 58,827 Gerlach GID Gerlach 135 $9.00 35,089 Desert Utilities Pahrump 106 $20.78 Gabbs, City of Gabbs 139 $6.40 28,500 Lovelock, City of Lovelock 2015 $27.20 34,563 Gardnerville Ranchos GID Gardnerville 3100 $12.00 48,795 lmlay Water System - Pershing County Lovelock 29 38,958 Carlin Utilities Carlin 830 $20.60 49,571 Douglas County - Cave RockISkyland Minden 430 $28.00 52,588 Eureka Sewer Eureka 194 $4.00 43,594 Washoe County Water Resources - Horizon Hills Reno 153 $32.35 Alamo Sewer & Water Alamo 278 $18.50 43,382 Hawthorne Utilities - Mina Water System Hawthorne 26 1 22,404 Ely, City of E~Y 1799 $21 .OO 36,408 Jackpot Water Dept. Jackpot 40 $14.00 30,488 Kingsbury GID Stateline 1712 $30.00 59,511 Lander County Sewer & Water #2 Austin 150 $10.00 33,897 Douglas County - North County Minden 58,527 Douglas County - Zephyr Water Utility District Minden 878 $28.00 52,588 Douglas County - North Valley Minden 982 $39.50 59,130 Minden IGardnervilIe Sanitation District Minden 2385 $12.00 51,4.71 Battle Mountain Water & Sewer Battle Mountain 986 $28.55 42,981 Crescent Valley Water Systems Crescent Valley 41,417 Gold Country Water Co. Winnemucca 38 Lamoille Water Users, Inc. Lamoille Logan Creek Estates GID Glenbrook Elko, City of Elko Page I sewer-user-rates lndian Hills GI0 Carson City Caliente Public Utilities Caliente Baker Water & Sewer GID Baker Carson City Utilities Dept. Carson City Douglas County - Uppaway Estates Minden Dayton Utilities - Rose Peak Water System Dayton Elko County, Montello Elko Indian Springs lndian Springs McGitl - Ruth GID McGill Mesquite Sanitation Department Mesquite Mountain City Water & Sewer, Inc. Mountian City Mt. Charleston Mt. Charleston Orovada GI D Orovada Panaca Farmstead Assn. Panaca Pioche Public Utility Pioche Pyramid Lake Utility Nixon Round Hill GID Zepher Cove Storey County Water & Sewer Virgina City Sun Valley GID Sun Valley TahoeIDouglas District Zepher Cove Tonopah Public Utility Tonopah West Wendover, City of West Wendover Winnemucca, City of Winnemucca Yerington, City of Yerington Silver Springs G.I.D. Silver Springs Lyon County- Willowcreek Yerington Canyon G.I.D. Sparks Average: Page 2 Page 1 of 1 Samson Yao From: Brent Farr [[email protected]] Sent: Wednesday, February 14,2007 I 1:48 AM To: Subject: Gabbs Proposal Samson, I have attached my proposal for the Gabbs project. I have also included a funding options spreadsheet that compares USDA and SRF low interest loans. I have had experience with both programs. There are pros and cons with each. It is not likely that you will find grant money for this project due to such low user rates. The only sources of funding I can think of would be CDBG, which you have applied for, or County funds. Beatty received funding from Nye County, so perhaps Gabbs will too. The spreadsheet shows the worst case scenario of borrowing all of the funds for the project. If you proceed with USDA, the project costs will be slightly higher than you anticipated due to all of the requirements that are attached to their funding. USDA only offers a 40 year term. SRF offers a lower interest rate, but only a 20 year term, so the payment is higher. You can play with the spreadsheet and change the numbers. I'll see you tomorrow. Brent Farr, P.E. Farr West Engineering 5442 Longley Lane, Suite B Reno, Nevada 8951 1 (775) 851 -4788 Main (775) 853-7255 Direct (775) 851 -0766 Fax 1 1 nL* 9. ' STATE 0 F NEVADA Jim Gibbons, hvermr PI EVA DY I DIVIS~ON Department of Conservation & Natural Resources Allen Biaggi, Director protecting the future fir generotions OlVlSlON OF ENVIRONMENTAL PROTECTION Leo M. Drozdoff, RE., Administrator January 17,2007 Samson Yao, P.E., Director Nye County Public Works 250 N. Hwy. 160, Suite 2 Pahrurnp, NV 89060 RE: Town d Gabbs WWTF Compliance Items - #NEV70021(2"dNotice) Dear Mr. Yao: This letter is being sent as a reminder for the following two items, which our office has not received as of this date: 1. Monitoring Well Installation: In a plans approval letter to your office, dated June 7, 2006, NDEP approved the plans and specifications to install a down gradient monitoring well. We have not received the installation verification (well driller's log) or any quarterly monitoring results for this well. 2. Pond Lining Plans: In a Facility Plan review letter to your office, dated January 11, 2006, NDEP requested the submittal of engineering plans and specifications to line the wastewater treatment pond($) in accordance with WTS-5. We have not received these plans by the required due date of Friday, January 12,2007. Therefore, please take the time to review these two items and facilitate their submittal to the attention of Diana Silsby, Compliance Coordinator by Wednesday, January 31,2007. If these two items are not submitted to this office by 12/31/07, please note that the Gabbs WWTF may be referred to the Enforcement Branch. If there are any questions, please feel free to contact me at (775) 687-9424. Sincerely, wa.d Mark A. Karninski, P.E. Technical Services Branch Bureau of Water Pollution Control 901 S. Stewart Street, Suite 4001 Carson City, Nevada 89701 p: 775.687.4670 f: 775.687.5856 ndep.nv.gov Page 2 Gabbs WWTF cc: Ray A. Dummar, Certified Operator, Town of Gabbs, P.O. Box 86, Gabbs, NV 89409 Monte Dennis, Chairman, Town of Gabbs, P.O. Box 86, Gabbs, NV 89409 Diana Silsby Cliff hwson, P.E. 901 S. Stewart Street, Suite 4001 Carson City, Nevada 8Q701-5249 p: 775.687.4670 f: 775.687.5856 ndep.nv.gov COUNTY NYE (775)751-8844 1 Office PUBLIC WORKS Pahrump Office (775) 751-6856 1 Fax Samson Yao I Director 250 N Hwy I60 # 2, Pahrump NV 89060 Fire No. January 26,2007 Technical Services Branch Bureau of Water Pollution Control qepartment of Conservation and Natural Resources Nevada Division of Environmental Protection 901 South Stewart Street, Suite 4001 Carson City, Nevada 89701-5249 . RE: Town of Gabbs WWTF Compliance Items - #NEV70021 (2"d Notice) Dear Mr. Kaminski: Thank you for your reminder letter dated January 17,2007. We are pleased to provide the following update. 1. Monitoring Well Installation An approval letter from NDEP for construction of the down gradient monitoring well dated June 7, 2006 was received by Public Works on June 12, 2006. Subsequently, the Nye County Board of County Commissioners approved the funding for this well at their ~uly.5,2006 meeting. A Scope of Work (Attached) was prepared and efforts ta retain an acceptable well driller licensed in Nevada were initiated in early August 2006. To date we have been unable to find a well driller willing to go to Gabbs and install the monitoring well. The County's solicitation efforts for this work are summarized in the table presented below. Date Company Comments 9AuqO6 Farris Drilling Follow-up 22Aug06, No Interest 9Aug06 Eklund Drilling No rigs available until next year 9Aug06 Gary Fador Construction Don't do drilling 9Aug06 Leach Drilling Company Follow-up 22Aug06, No Interest - 28Aug06 Cook Drilling No Interest 19Sep06 Parsons Drilling No Interest 14DecOG Ray Pezonella & Associates No Interest + 19Dec06 Wellsco Drilling No Interest 20Dec06 Budget Drilling No lnterest We are continuing our efforts to find a contractor for this work. Any recommendations on your part regarding a possible well driller for performing this work would be greatly appreciated. 2. Pond Lininq Plans The completion of both the collection and treatment improvements, as recommended in our Facility Plan, without financial aid, would cause server financial hardship to the residents of Page 2 RE: Town af Gabbs WWTF Compliance Items - #NEV70021 (2* Notice) NDEP Letter January 17,2007 Gabbs; and as such Nye County has been diligently seeking funding sources from available grants and low interest loans such as CDBG and CWSRF. Over the past year we have filed an application for a CDBG grant to assist in completing the first phase of the Plan (collection system rehabilitation) as well as an application to be placed on the Priority List for projects to be funded from the State of Nevada Division of Environmental Protection Clean Water Revolving Fund (CWSRF) for Federal Fiscal Year 2007. With regards to our application for SRF consideration, submitted on February 12, 2006 to the Office of Financial Assistance, we recently discovered from visiting their web site that the project is now on the Priority List FY2007 CWSRF (CS32-0703).Included in this application were plans for relining of the existing primary pond, addition of a new lined pond and a constructed wetland for additional water quality enhancements. Finally, our delay in submitting the documentation for the pond lining plan was due to our misunderstanding of Item 3 in your letter of January 1A, 2006 where it was noted that no additional ponds be construction until the monitoring well was installed and water samples obtained to determine what, if any, impacts may have occurred during the previous operations of the waste water treatment facility. It was our belief that this restriction also included the design work since such efforts could be directly impacted by the findings of the water samples taken from the monitoring well. We sincerely apologize for our misinterpretation of this deadline requirement. We wish to express our gratitude for your support of the Gabbs sewer Facility Plan. Again we regret our apparent misunderstanding on the timing and proper sequence of events for the completion of the monitoring well, the SRF application, your approval of our Facility Plan and Environmental Review, and the submission of the project design. In the future, we will endeavor to keep you fully apprised on the status of this project in a timelier manner. Due to time constraints, we cannot meet your timeline and we respectfully request your Department to extend the completion date of the project design to January 25, 2008. Your patience and forbearance on the completion of these two items would be greatly appreciated. Sincerely, Director cc: Diana Silsby Jon Palm Morris Kanowitz, CWSRF Program Manager Ron Williams, County Manager Monte Dennis, Chairman, Town of Gabbs Ray Dummar, Certified Operator, Town of Gabbs