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HomeMy WebLinkAbout2009-015 C WORK ORDER NUMBER 19 This Work Order Number 19 is entered into as of this 13th day of January. . , , 200 9pursuant to that certain Continuing Contract Agreement for Professional Services entered into as of August 10 2004 and amended effective July 24 , 2007 (as so amended, the "Agreement") , by and between Indian River County Solid Waste Disposal District, a dependent special district of Indian River County , Florida as extended to Indian River County a political subdivision of the State of Florida ("County") and Geosyntec Inc., a Florida corporation ( "Consultant") . The County has selected the Consultant to perform the professional services set forth on Exhibit 1 , attached to this Work Order and made part hereof by this reference . The professional services will be performed by the Consultant for the fee schedule set forth in Exhibit 2 and within the timeframe more particularly set forth in Exhibit 3 , all in accordance with the terms and provisions set forth in the Agreement. Pursuant to paragraph 1 . 4 of the Agreement, nothing contained in any Work Order shall conflict with the terms of the Agreement and the terms of the Agreement shall be deemed to be incorporated in each individual Work Order as if fully set forth herein . IN WITNESS WHEREOF , the parties hereto have executed this Work . Order ` as - of the date first written above . GEOSYNTEC , INC . INDIAN RIVER COUNTY BOARD OF COUNTY CONIAMISSIONERS By : C r' Br Thomas A. Peel , Ph . D . Wesley Davis , Chairman Title: Vice President/Prindbal Attest J Barton , Clerk of Court By : vii. . Deputy Clerk Approved : r�, r%-42 lt� - A J ph A . aird, County Administrator Ap roved as to form and legal sufficiency : arian E . Fell , Sr . AssistanorCounty Attorney FR1329/XR08264 .DOC engineers I scientists I innovators EXHIBIT 1 SITE ASSESSMENT PROPOSAL FR 1329/XR08264.DOC engineers I scientists I innovators 6770 South Washington Avenue, Suite 3 GeosMtecl'� Titusville, Florida 32780 PF{ 321 . 269. 5880 cI nsu tan t 3 FAX 321 269 5813 1. 1tR 4t' . Lftil: G lilt.4.2(3; I1 16 December 2008 Mr . Terry Southard Operations Manager Indian River County Utilities 4350 41 " Street Vero Beach, FL 32967 Subject : Site Assessment Proposal North County R . O . Plant, Facility # 9600729 Vero Beach , FL 32962 Dear Mr. Southard , Geosyntec Consultants (Geosyntec) is pleased to submit this fee proposal to Indian River County ( IRC) for professional services required to respond to Florida Department of Environmental Protection ' s (FDEP ' s) correspondence dated 28 October 2008 . The FDEP correspondence was generated based upon a review of Geosyntec ' s 7 August 2008 letter report, Groundwater Assessment and Monitoring - June 2008, North RO Plant, Facility 99600729 . Based upon FDEP ' s review of the letter report, and the findings/recommendations contained within , the following additional tasks have been requested : Installation of a background monitoring well as proposed in Geosyntec ' s 7 August 2008 letter and as approved in FDEP ' s correspondence dated 28 October 2008 . • Collection of additional depth to groundwater data to assess the groundwater now direction . • Performance of assessment and delineation activities for sodium and pH , in accordance with the requirements of Chapter 62 - 780 , FAC . • Collection of ground water samples from all monitoring well locations with analyses of the collected groundwater samples for total dissolved solids, chloride , sodium and sulfate , in addition to the field parameters of pH , temperature, specific conductance , turbidity and dissolved oxygen . If any additional parameters (other than pH and sodium) are detected above the Maximum Contamination Levels (MCLS) from this sampling event, those parameters must be included in the site assessment report ( SAR) . • Preparation of a SAR, which meets the minimum requirements of Chapter 62 - 780 , FAC . The SAR must include the delineation of the vertical and horizontal extent of groundwater impacts and recommendations in context of further clean up requirements as deemed appropriate . FR1329/XR08264 . DOC Mr . Terry Southard 16 December 2008 Page 2 The SAR document will also provide, as requested by the FDEP, a location map and a figure which identifies facility buildings . Note : As requested by Geosyntec, IRC has recently provided an as-built plan in CAD format, which we have assumed in this proposal will be adequate for the purposes required by Geosyntec . The proposed scope of work summarized below is intended to respond to FDEP comments in a cost effective manner . PROPOSED SCOPE OF WORK Task 1 — Water Supply Well Survey Following FDEP guidance , Geosyntec will perform a "water supply well survey" in an attempt to identify and obtain information on area water supply wells . This survey will focus on locating public water supply wells located within 0 . 5 miles of the facility boundary and private water supply wells located within 0 . 25 miles of the facility boundary and has the goal of ascertaining whether or not the site is located within proximity to supply wells in the area which could be affected by the contamination and/or could affect area groundwater flow . This effort is required under FDEP ' s SAR regulations ( 62 - 780 . 600 FAC) . The following subtasks will be performed : • contracting with a database service to request information on permitted supply wells located in the area; • contacting St . Johns River Water Management District, the local health department, Indian River County utilities (assumed that IRC will assist Geosyntec with retrieving this information) , Indian River County Environmental Planning Section , and the City of Vero Beach utilities to request information on permitted supply wells located in the area; and • performing a "windshield survey" from public roads to look for evidence of supply wells (to be completed during field event( s) described below in this proposal ) within 0 . 25 miles of the facility boundary . Additionally , we will attempt to identify adjacent surface water bodies which could be potentially affected by or influence onsite contamination . FR1329/XR08264. DOC Mr. Terry Southard 16 December 2008 Page 3 Task 2 — Site Assessment Field Drilling/Sampling Activities 1st Mobilization • Mobilize to the site and provide oversight of the installation up to five , '/4- inch temporary monitoring wells to a depth of 8 to 10 ft below land surface (BLS - depth to groundwater estimated at approximately 5 ft BLS) north , south, and/or west of the area with pH and sodium impacted groundwater using hand auger equipment to supplement the previously installed wells in an effort to provide lateral delineation of the previously identified area of sodium impacted groundwater . Note : For clarification the goal of the proposed field activities is for the delineation of sodium impacted groundwater and not for the delineation of pH impacts . • Provide oversight of the installation of the FDEP-approved background monitoring well (as proposed in Geosyntec ' s in 7 August 2008 letter report) by a licensed water well subcontractor . The monitoring well will have a '/4 - or 1 - inch diameter PVC casing and pre-packed screen and will be finished within a protective flush-mounted manhole cover . Note that macro-core soil sampling will be conducted prior to installation of the well and soil samples will be visually characterized by the Geosyntec field representative (enabling the preparation of a lithologic cross section , which is a Chapter 62 -780 , FAC , SAR requirement) . • Collect a complete set of groundwater level measurements and collect groundwater samples from existing monitoring wells MWO1 and MW02 , the five proposed temporary monitoring wells, and up to 11 existing piezometers for the FDEP-required analytical suite (dissolved solids , chloride, sodium and sulfate) . As required by the FDEP, all groundwater samples proposed herein will be laboratory analyzed for dissolved solids by EPA Method 160 . 3 , chloride and sulfate by EPA Method 300, sodium by EPA Method 6010 , sulfate, and field screened for pH, temperature, specific conductance, turbidity and dissolved oxygen . 2 "d Mobilization After reviewing the information obtained from the I " mobilization described above , Geosyntec will conduct the following on -site activities during a 2nd mobilization to the site . • Provide oversight of the installation of three permanent shallow- screened monitoring wells (approximate depth of 13 -ft BLS) , in an effort to provide horizontal delineation of sodium (and dissolved solids, chloride, and/or sulfate , if detected) impacted groundwater to the north , south, and west of the sodium- impacted area currently identified above the associated screening limit . Macro-core soil sampling will be conducted prior to installation of the wells and soil samples will be visually characterized by the Geosyntec field representative . Note that well installation(s) may be located within approximately FR 1329/XR08264 .DOC Mr . Terry Southard 16 December 2008 Page 4 30 ft outside (west) of the western fence line, which according to IRC personnel and a CAD file provided by IRC ' s contractor remains within the IRC property limits (estimated to be approximately 50 ft from the western fence line) . Note that Geosyntec has assumed that no monitoring well installations will be required inside facility buildings . If this is the case , then additional budget under a separate cover may be required . • CONTINGENCY — if warranted by the sampling data from MW02 , Geosyntec will provide oversight of the installation of one permanent deep- screened monitoring well (approximate depth of 40 -ft BLS ) , in an effort to provide vertical delineation of sodium impacted groundwater in the vicinity of the area of highest currently observed sodium impacts using direct push technology (DPT) drilling techniques . Prior to well installation , Geosyntec will collect a groundwater sample from the interval from 35 - ft to 40 - ft BLS via DPT and field screen to verify that salinity/conductivity levels are below levels previously observed by Geosyntec . If the salinity/conductivity at a depth of 35 to 40 ft BLS exhibit elevated salinity/conductivity levels, the monitoring well will be installed to a maximum depth of 50 ft BLS . 3rd Mobilization • The FDEP requires that permanent monitoring wells be sampled after a minimum of 24 - hours after the installation has been completed . Therefore , groundwater samples will be collected from the four (plus one contingency deep -well , if needed) above-proposed permanent monitoring wells during the 3 d mobilization to the site to be scheduled at least 24 - hours after installation completion . • Collect a complete set of groundwater level measurements and perform groundwater sampling activities in accordance with FDEP Standard Operating Procedures . • To help address FDEP requirements, Geosyntec will complete the following in an effort to better understand the potential for migration of contaminants detected by Geosyntec to exist onsite during the site subsurface assessment . A calculation of the hydraulic conductivity in the surficial portion of the onsite aquifer will be estimated through slug testing in two of the installed shallow monitoring wells and in one deep monitoring well . • Provide oversight to a professional surveyor during the collection horizontal and vertical control data for all existing and proposed site monitoring wells and piezometers (twenty - two locations expected) . Note that the use of a licensed surveyor is based on requirements for site assessments conducted in accordance with Chapter 62 - 780 FAC . FR1329/XR08264. DOC Mr. Terry Southard 16 December 2008 Page 5 Task 3 — Site Assessment Report Preparation The FDEP requires two copies of the SAR be submitted to the FDEP . Please note the assessment efforts described above may or may not be sufficient to collect the data needed to satisfy SAR requirements ( in particular, we do not at this time know if the above efforts will be sufficient to delineate the extent of contamination) . If we find during completion of the above tasks that additional site assessment work is necessary , we will discuss our recommendations with you and seek approval prior to proceeding If additional tasks are required beyond the scope of this proposal additional budget will be required . The SAR will describe the tasks that were completed pursuant to Chapter 62 - 780 FAC and will summarize the obtained results . The SAR will include recommendations for additional monitoring and/or remediation . In an effort to address FDEP guidance, the following will be included in the SAR : • a brief summary of the site history and operations ; • a copy of the portion of the USGS topographic map that identifies the site in relation to the surrounding area ; • a vicinity map showing pertinent site features, such as utilities, aboveground and underground structures, storage areas, local drainage features, land cover , facility boundaries, and potential sources of contamination identified during the assessment ; • tables listing the monitoring well top-of-casing elevations, depths to groundwater and water- level elevations (obtained at least twice , at least one month apart and the dates the data were collected) ; • tables summarizing the groundwater analytical results, reporting limits used , and analyses performed ( listing contaminants detected and the corresponding cleanup target levels proposed for use for the site) ; • a description of the site-specific stratigraphy, based on the lithologic logs prepared during soil boring and monitoring well installation ; • details of assessment methodologies used at the site, including field screening techniques and other testing ; • monitoring well construction details and construction diagrams , including methods and materials , field sampling data sheets, lithologic logs , and volumes of groundwater removed during well development and/or purging ; FR1329/XR08264 , DOC Mr . Terry Southard 16 December 2008 Page 6 • one general cross- section illustrating the site- specific stratigraphy ; • a map showing the approximate location(s) of identified water supply well(s) in relation to the facility as identified during the well survey ; • scaled site maps illustrating the water- level elevations calculated at each monitoring point , and an interpretation of groundwater flow direction ; and • one or more scaled site maps showing sampling locations, and an illustration of the degree and extent of groundwater contamination . A draft of this report in PDF form will be prepared for your review prior to submission to the FDEP . Two signed and sealed copies of the final SAR will be produced for the FDEP and IRC . Additionally, an electronic copy (PDF) of the final SAR will be provided to IRC on a CD . ASSUMPTIONS In addition to the above , the following assumptions were made in developing this scope and cost estimate : • Geosyntec assumes that IRC site personnel will provide support in regards to the identification of potential underground utilities and clearing proposed well locations (the area the FDEP has requested additional wells may be in close vicinity to site structures) . Please note that this budget assumes that all drilling locations will be cleared by IRC personnel prior to Geosyntec ' s arrival . • IRC will provide a CAD map(s) which provide property boundaries , show the location and identification of site structures and the locations of underground utilities . • Site access will not be restricted to Geosyntec and can be obtained by Geosyntec immediately upon receipt of your Notice to Proceed . • Geosyntec will be able to work unimpeded between Monday and Friday from 7 am - 7 pm . • No clearing of vegetation will be necessary and track-mounted drill rig access is available to each location designated for investigation . • The groundwater table will be encountered at approximately 3 - 5 ft below land surface and is accessible with a drill rig . • Water and electricity are available for Geosyntec ' s use . FR 1329/XR08264 . DOC Mr . Terry Southard 16 December 2008 Page 7 • All underground/above- ground utility/structures will be located for Geosyntec by a facility representative prior to drilling at the site ; Geosyntec will not be responsible for damage to unidentified utilities/structures . • All work can be performed in Level D personal protective equipment . • Laboratory analytical methods prescribed herein may not be available from the laboratory ; if this is the case, a similar method will be selected to analyze for the desired suite of chemical constituents . • Geosyntec will notify the FDEP of our field schedule prior to field work activities . • Sampling will be performed in general accordance with certain guidance contained within FDEP ' s standard operating procedures, effective April 2002 and modified in June 2004 . • No laboratory analyses of soil samples are required for this site assessment . • The field activities will be completed in five days or less . Please be advised that the installation of additional piezometers and/or permanent monitoring wells may be required to fully delineate the groundwater impacts ( laterally and vertically) . • The SAR is intended to comply with FDEP ' s 28 October 2008 letter and to meet the intent of a Chapter 62 - 780 , FAC , Site Assessment . ESTIMATED BUDGET A summary of estimated project costs is included in Exhibit 2 attached . FR 1329[XR08264 . DOC Mr . Terry Southard 16 December 2008 Page 8 CLOSURE Geosyntec appreciates the opportunity to submit this proposal to provide environmental consulting services to the IRC Utilities Department . Upon execution of the Work Order, Geosyntec will immediately schedule the field activities . We anticipate that the initial field activities will be completed within four weeks of Work Order execution . The SAR will be completed within approximately six weeks of receipt of the final laboratory analytical results . Please do not hesitate to contact Dean ( 561 -995 - 0900) or Jim (321 -269 - 5880) if you have any questions regarding the proposed scope of work . Sincerely , Dean P . Pinson, P . E . Project Engineer James J . Langenbach , P . E . Associate Attachments FR 1329/XR08264. DOC 04 � O � a W � O V U O Q N W O CG X O� N ` M w Table 1 Summary of Estimated Costs Indian River County Site Assessment Proposal No. XR08264 , Labor Direct External Task Task Description Hours Labor Expenses Expenses Total Cost 1 Water Supply Well Survey 39 $45228 . 70 $430 . 46 $4,659 2A Site Activities - 1st mobilization 34 $4,082 . 90 $985 . 69 $4, 077 . 77 $95146 2B Site Activities - 2nd mobilization 24 $25831 . 68 $302 . 15 $2 ,915 . 75 $6,050 2C Site Activities - 3rd mobilization 34 $39777 .42 $978 . 92 $29421 . 41 $ 73178 3 Site Assessement Report (SAR) 92 $99841 . 32 $370 . 24 $ 10, 212 Contingency - Deep Well Installation 17 $1, 855. 21 $621. 66 $19714. 14 $49191 Total (including contingency) 240 $269617 $3,689 $ 119129 41 ,435 Note: 1 . Contingency task element and associated costs (total of $4, 191 ) will not be implemented/invoiced without specific approval by IRC . [R1329/XR08264 Page 1 of I Geosyntec Consultants EXHIBIT 3 SCHEDULE Site Assessment Proposal North County R . O . Plant, Facility # 9600729 Vero Beach , FL Upon execution of the Work Order, Geosyntec will immediately schedule the field activities . We anticipate that the field activities will be completed within four weeks of Work Order execution . The Site Assessment Report summarizing the field activities will be completed within approximately six weeks of receipt of the laboratory analytical results . FR 1329/XR08264 . DOC