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Home My WebLink About64481 RESOLUTION NO. 6448 A RESOLUTION APPROVING AN AGREEMENT WITH CHEN- NORTHERN, INC. FOR PROFESSIONAL SERVICES IN PROVIDING A RECOVERY SYSTEM AND SUBSURFACE INVESTIGATION AT PUEBLO MEMORIAL AIRPORT BE IT RESOLVED BY THE CITY COUNCIL OF PUEBLO, COLORADO, THAT: SECTION 1: An Agreement between the City of Pueblo and Chen - Northern, Inc. a copy of which is on file in the office of the City Clerk and incorporated herein by reference, whereby Chen - Northern, Inc. shall provide and perform Professional Engineering Services for a product recovery system of sub- surface gasoline encountered at Pueblo Memorial Airport; dated October 10, 1989, having been approved as to form by the City Attorney, is hereby approved. SECTION 2: Compensation for these Services shall not exceed $50,000.00 unless a properly executed change order is approved by the City Manager. SECTION 3: The City Manager is hereby authorized to execute said Agreement on behalf of the City of Pueblo, a Municipal Corporation and the City Clerk shall affix the Seal of the City thereto and attest the same. - T- SECTION 4: The City Council hereby finds and determines that the removal of the subsurface gasoline is an Airport Development Project. An amount equal to the Professional Fees to be payable under the Agreement is hereby authorized to be transferred from the One -Half Cent Sales Tax Fund for payment thereof. _0 M-00! Introduced October 10.1989 BY SAMEL CORSENTINO Councilman APPROVED: r sident of he Council f � ChenONorthern, Inc. ttQ. City of Pueblo 31475 Bryan Circle Pueblo, Colorado 81001 Attn. Mr. Ray Monroe Dear Mr. Monroe: Consulting Engineers and Scientists 96 South Zuni Street Denver, Colorado 80223 303 744 -7105 303 744 -0210 Facsimile September 21, 1989 Subject: Proposal for Recovery System and Subsurface Investigation, Pueblo Memorial Airport, Pueblo, Colorado Chen Northern, Inc., is pleased to submit this proposal for a product recovery system for subsurface gasoline encountered at the Pueblo Airport. We have based this response on information gathered during the previous site investigation conducted under our previous Job No. 6 143 89. The previous site investigation included a °,soil vapor survey which indicated areas of possible subsurface contamination. The purpose of the recovery system is to remove and separate subsurface gasoline identified at the ground water and bedrock interface. The gasoline will be recycled and the separated water, with permission of Federal and State agencies, will be discharged into an infiltration gallery upgradient of the recovery system trenches. To evaluate the extent of possible contamination south of the original soil vapor survey, additional soil vapor points will be installed and evaluated. Based on the results of these points and the previous survey, we propose the installation of monitoring wells to evaluate ground water quality in the area. SCOPE OF WORK Petroleum Recovery System Based on the information collected during the previous investigation, we propose a system of trenches to be installed within the area Down to contain free product. The location of the trenches are shown on the site plan, Figure 1. The trenches will drain by gravity to a sump pit A member of the III- group of companies City of Pueblo September 21, 1989 Page 2 located on the southwest corner of the area. Trench dimensions and grading are shown on Figure 2. The width of each trench will be 5 feet. The total depth of the trenches will be determined based on the depth to shale bedrock. Subsequent to excavation, the trenches will be backfilled with clean 1 1/2 -inch gravel. To a depth approximately one foot above bedrock. The remainder of the trench will be backfilled with clean on -site material. The liquid collected in the sump pump will be evacuated by an automatic skimmer. The skimmer operates by lowering a recovery vessel into the sump pit. When the recovery vessel is approximately 3/4 full, it is raised into the separator unit. The separator will discharge gasoline to a 500 gallon recovery tank and the separated water will be discharged, with approval from state and federal authorities, to an infiltration gallery located north of the recovery system, shown on Figures 1 and 3. Subsurface Investigation An additional soil vapor survey will be conducted adjacent to the site to the south to further evaluate potential subsurface contamination. Based on the results of this and the previous survey, monitoring wells will be placed to evaluate local ground water quality and to evaluate the effectiveness of the recovery system. The rnmlber and location of the monitoring wells will be dependent upon the soil vapor survey. At this time, we feel that six wells, at a minimum, will be needed to initially evaluate the subsurface conditions. Report A final report will be prepared presenting the results of the subsurface investigation, construction details of the recovery system and the monitoring wells and recommendations for continued monitoring and operation of the recovery system by your personnel. The estimated cost for the recovery system equipment and installation ranges from $9,600 to $10,000. This cost is based on four months of operation each additional month of operation will cost an additional $1,700. This cost City of Pueblo September 21, 1989 Page 3 does not include the excavation of the trenches or cost of the gravel to backf ill the trenches, both of which we understand will be provided by the City of Pueblo. We estimate the cost for the subsurface investigation to range from $10,300 to $11,000. We estimate the total cost for installation of the recovery system and the subsurface investigation to range from $19,900 to $21,500. Since the work required to accomplish the subsurface investigation cannot be accurately defined in advance, we propose our fee be based on our hourly and unit costs in accordance with the attached Fee Schedule (Exhibit A). Local, State and Federal agencies must approve any plans for the introduction of the treated water into the ground water and may require sampling of the recovery system in order to allow discharge of the separated water. At this time, we our awaiting responses from the respective agencies for guidance on acceptable monitoring procedures of the system. Due to this uncertainty, accurate costs cannot be defined at this time. As soon as this information is available, we will contact you with the additional cost. Schedule We anticipate construction of the system to be complete within three weeks of approval by the appropriate agencies. We anticipate completion of the subsurface investigation within three weeks from notice to proceed. If this proposal meets with your approval please sign the attached agreement for professional services and return it to this office for signature. Please note the contract provisions contain a limitation of Chen- Northern's liability. City of Pueblo September 21, 1989 Page 4 If you have any questions or require any additional information concerning our proposed scope of work, please do not hesitate to contact us. Sincerely, WAIT-NORTHERN, INC By:_ C i Reviewed By: Director, Environmental Services EWm Enclosures a SCALE 1" = 50' SKIMMER 1 6 143 89 � a e n o N o rt h e rn , I n C . I S I T E PLAN PUEBLO AIRPORT- I Fig. i l CORRECTIVE ACTION - BI - - A A' GROUND SURFACE DEPTH TO BEDROCK °:fl Oo �o�;� °O Q.o °O a °a • oa:'� dD.... p fl 4 p 4� OpC7�jQ o .: 1 Rs 21 o•o�:v zpG RAVEL 0 �..p.' ° o 0 0 ,O o �. • o �Q 2.5% GRADE •� ° Q'.� o � 2.5% GRADE � i v .Q c.Ooo.�'Q1d .•-�� Q.a�` `• ._ .•� °� Q 3 40' 5' 85� 130' 5• 6 143 89 ChenONorthern,Inc. TRENCH SYSTEM PROFILE Fig 2 PUEBLO AIRPORT - CORRECTIVE ACTION B BI r C' 9 4 2' 6' COMPACTED EXCAVATED MATERIAL 4'' PVC DRAIN COMPACTED EXCAVATED MATERIAL • • o• o eC . Q 6' • �o°. j +o • Oo Qo�:e ;• W•• o� ebo oO¢:� 4" PVC DRAIN oil 1 6.143 89 ChenONoMem,i c. I PUEBLO CORRECT I VE I Fig. 3 . 40' 10' Chen- Northern, Inc. A member of the $I$ group of companies AGREEMENT FOR SERVICES THIS AGREEMENT is by and between City of Pueblo 31475 Bryan Circle Pueblo, Colorado 81001 herinafter called Owner and Chen - Northern, Inc. 96 South Zuni Street Denver, Colorado 80223 hereinafter called CHEN- NORTHERN, who agree as follows: 1. DECLARATIONS. CLIENT DESIRES TO ENGAGE CHEN- NORTHERN to provide services in connection with Owner's project ( "The Project ") described as follows: Recovery System and Subsu rface _Investigation, Pueblo Memorial Airport Pueblo Colorado CHEN- NORTHERN has submitted a fee schedule to Owner, a copy of which is attached hereto and made part hereof as Exhibit "A ", for such services, which fee schedule is acceptable to Owner. 2. SCOPE OF WORK. CHEN- NORTHERN shall provide services for The Project in accordance with the accompanying proposed "scope of services" made a part hereof as Exhibit "B ", and "terms and conditions" as set forth on the reverse side of this agreement. 3. OWNER DISCLOSURE OF HAZARDOUS & TOXIC MATERIALS AND CONDITIONS AT THE PROJECT. Owner warrants to CHEN - NORTHERN that to the best of its knowledge no hazardous wastes or conditions exist at The Project site. X Owner warrants to CHEN- NORTHERN that to the best of its knowledge the only hazardous or toxic materials which exist at The Project site are as follows: The sub— surface gasoline which has been explored and analyzed by Chen= Northen. Owner acknowledges and confirms that CHEN- NORTHERN is relying upon the above warranties in undertaking to perform the services described in this Agreement. EXECUTED THIS 10th day o f OCTOBER 119 30 By By (rev. 1988) CNI - 187 EXHIBIT "A" Chen - Northern, Inc Effective March 1, 1989 - PROFESSIONAL FEE SCHEDULE FIELD INVESTIGATION: Drilling & Standard Sampling 4 -inch Solid Auger . $ 85.00 /hr. Hollow Stem Auger, up to 3 ID ....................... $ 95.00 /hr. Rotary and Diamond Core Drilling , $100.00 /hr. Large ID Auger, Extra Sampling, Shelby Tubes, ..................................................... Packer Tests, Load Tests, etc.. Rates Quoted on Project Basis Track - Mounted Drill Rig . Additional $ 20.00 /hr. .. Truck - Mounted Drill Rig Travel ..................... • • • • . • • $ 2.25 /Mile Rig Stand -by Time...... ............... ............................... $ 80.00 /hr. Rig Overtime, over 40 hours per week, Saturday, Sunday and Holidays additional $ 20.00 /hr. Portable Hand Operated Power Auger.. . . . • . . $ 75.00 /hr. Equipment Rental (Backhoe, ATV Drill Rig, Air Compressor, Geophysical Equipment and Supplies) .............. Cost + 15% Equipment Charges (Resistivity Meter, Gascope, Photoionization Meter, Pressuremeter, Plate Bearing Apparatus, Field Permeameter) ......................... Rates Quoted on Project Basis Field Engineer or Technician $ 35.00 /hr. Overtime (over 8 hours per day, Saturday, Sunday and Holidays) . • . • . . • . Environmental Sampling .......................... ys) • ��•��••��•"��•�'��" " " " ""••• $ 45.00 /hr. • • • • • • • • • • • ................. Fee Schedule Available on Request LABORATORY TESTING SOIL Moisture Content and Density (ASTM D- 2216) ...... $ 9.00 SOIL "R" Value Hveem Stabilometer (ASTM D -2844) ..... $250.00 Atterberg Limits (ASTM D -4318) ................. 36.00 Water Soluble Sulfate ......................... Specific Gravity (ASTM D-854) .................. 32.00 pH ................................. 9.00 Gradation Analysis (ASTM D -422) Organic Content ............................. 35.00 a. All Standard Sieves to #200 Sieve ........... 35.00 Pinhole Dispersion ........................... 115.00 b. With Bulk Sample Preparation, add .......... 20.00 Lab Resistivity ............................... 50.00 Hydrometer Analysis .......................... 60.00 Capillary- Moisture Relationships Percent Less than #200 Sieve . 16.00 (ASTM D -2325 and D -3152) ................. 182.00 Standard Swell- Consolidation (ASTM D -4546) 50.00 Hazardous and Contaminated ..... Air -Dried Swell- Consolidation .................. 55.00 Materials Testing ...... Rates Quoted on Project Basis Constant Volume, Swell Pressure ................ 100.00 ROCK Time - Consolidation (ASTM D -2435) .............. 300.00 Natural Density and Moisture Content (ISRM) ...... $ 15.00 Unconfined Compressive Strength (ASTM D -2166) .... 30.00 Point Load (ISRM) ............................ 20.00 Direct Shear, per point Slake Durability (ISRM) ........................ 80.00 a. Unconsolidated - Undrained (Quick Test) ...... 75.00 Brazilian Test (ISRM) .......................... 100.00 b. Consolidated - Undrained (R -Test) ........... 100.00 Uniaxial c. Consolidated- Drained (ASTM D -3080) ....... . 220.00 a. Peak Strength (ASTM D- 2938) .............. 60.00 d. Consolidated- Drained, Residual ............ 300.00 b. With Young's Modulus & Triaxial Shear, per point Poisson's Ratio (ASTM D -3148) ........... 190.00 a. Unconsolidated - Undrained (Quick Test) ...... 70.00 Direct Shear, per point b. Consolidated - Undrained (R -Test) ........... 275.00 (Solid, Joints or Pre - Sheared) c. Consolidated- Drained (S -Test) ............. Triaxial Shear, Multistaged 3 pt. CU 400.00 a. Unconsolidated- Undrained ............... 90.00 .............. Permeability 750.00 b. CANMET Procedure 100.00 •••••••••••••••••.... a. Falling or Constant Head, 2 -4" Dia........... 85.00 Triaxial Shear, per point b. Triaxial Permeability ...................... 230.00 a. Unconsolidated -Undrained (ASTM D -2664) ... 115.00 c. Remolded (BOR E -13) .................... 200.00 b. With Young's Modulus 8 Standard Proctor Compaction (ASTM D -698) ...... 65.00 Poisson's Ratio ........................ 200.00 Modified Proctor Compaction (ASTM D -1557) ...... 75.00 c. On Joints ( CANMET) ..................... 130.00 Relative Density (ASTM D -4253 and D- 4254) ....... 90.00 Sample Preparation, per specimen ............... 20.00 California Bearing Ratio (ASTM D- 1883), 1 -Point ... 90.00 Special Testing ........... Rates Quoted on Project Basis California Bearing Ratio (ASTM D- 1883), 3 -Point ... 250.00 Laboratory Technician ...................... 32.00 /hr. ENGINEERING OTHER DIRECT CHARGES (Covers planning, supervision, field trips, analysis, Auto or Pickup Mileage ............. 0.40 /mile consultation, preparation of reports, and travel time) Principal Engineer or Scientist ....... $ 95- 115.00/hr. 4 -Wheel Drive Vehicle .............. 0.50 /mile Project Manager or Scientist ......... 74- 95.00 /hr. Out -of -town living expenses, Senior Project Engineer or Scientist ... 58- 74.00 /hr. commercial travel costs, Project Engineer or Scientist......... 50- 58.00 /hr. Staff Engineer or Scientist equipment rental, etc ................ Cost+ 15% ........... 42- 50.00 /hr. Jr. Engineer or Technician ........... 35- 42.00 /hr. Computer or CAD Time Draftsperson ...................... 30.00 /hr. In -House Quoted on Project Basis Word Processor ................... 28.00 /hr. Computer Time Vendor ............. Cost + 154 Special Consultation, Expert Testimony and Court Appearance (Minimum) ... 500 - 800.00 1da Interest charged after 30 days y from invoice date CONSTRUC OBSERVATION AND MATERIALS TESTING .... . t V % /month re„ n _