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Project Scope of Work

Project Scope of Work 2003

Quality Assurance Split Sample Analysis and Reporting for the Lake Okeechobee, Western Hillsboro Canal, and Caloosahatchee River Aquifer Storage and Recovery Pilot Projects


The Central and Southern Florida Project Comprehensive Review Study (USACE, 1999) - developed jointly by the South Florida Water Management District (SFWMD) and the U.S. Army Corps of Engineers (USACE) - presents a framework for Everglades restoration. Now known as the Comprehensive Everglades Restoration Plan (CERP), this plan contains 68 components, including structural and operational changes to the Central and Southern Florida Project (C&SF). The CERP achieves the restoration of more natural flows of water, including sheet flow, improved water quality and more natural hydro-periods in the south Florida ecosystem. Improvements to native flora and fauna, including threatened and endangered species, will occur as a result of the restoration of the hydrologic conditions. The plan was also designed to enlarge the region's supply of fresh water and to improve how water is delivered to the natural system. A large number of the construction features contained in the CERP were designed at various levels of detail based on information that was available during the plan formulation and evaluation phase. Many of the design assumptions for the components were based solely on output from the South Florida Water Management Model, which averages hydrologic conditions across a model comprised of grid cells with lengths and widths of 2 miles by 2 miles. Consequently, the engineering details of the construction features, including the size and locations are conceptual. More site-specific analyses of the individual components would be needed during the preconstruction engineering and design phase to determine the optimum size, location, and configuration of the facilities. In addition, there are uncertainties associated with some of the technologies being utilized in the CERP. To this end, the CERP contains a number of pilot projects, with the intention of acquiring more information and addressing the uncertainties. Some of the pilot projects described in the CERP include the construction of aquifer storage and recovery (ASR) systems along the Hillsboro Canal, the Caloosahatchee River and adjacent to Lake Okeechobee. The project concept is to store partially treated surface water or groundwater when it is available in ASR wells - completed within the underlying Floridan Aquifer System (FAS) - for subsequent recovery during dry periods. Among other benefits, implementation of regional ASR technology at the Lake Okeechobee (Lake) site is anticipated to help minimize high-volume water releases to the St. Lucie and Caloosahatchee River estuaries. During dry periods, water recovered from the ASR wells would be used to maintain the surface water level within the lake and associated canals throughout the Everglades, and to augment water supply demands.

Prior to injecting water into an ASR well or exploratory well, a permit must be obtained from the Florida Department of Environmental Protection (FDEP). In order to complete the necessary application for the permits, characterization of the potential water to be injected into the Floridan Aquifer must be performed. As a result, the USACE and the SFWMD have contracted with a firm to perform the required sampling, analyses, and reporting. Since the ASR concept is somewhat controversial, the Government wants to generate the best analytical data in order to demonstrate the true quality of the potential water to be injected into the Floridan Aquifer. One of the aspects for generating sound quality analytical data is to collect quality assurance (QA) split samples that will be submitted to a third party analytical laboratory for analysis. The results from the QA split samples will then be compared to the analytical results from the primary analytical laboratory. The U.S. Geological Survey Ocala Laboratory (USGS) will provide the third-party laboratory analysis of the QA split samples. The USGS has the necessary capability for performing the analysis, reporting, and the comparison the primary sample results for the QA split samples.

Task 1 - QA Sample Analysis and Reporting

Duration - As required, a maximum of six (6) samples will be analyzed as part of the scope of work. The last sample will be delivered no later than June 1, 2003.

A Contractor procured by the DA will perform sample collection of the QA split samples for submission to USGS. QA samples in the form of "QA Splits" will be collected for this project and shipped to the USGS facility located in Ocala, Florida. QA samples are replicates of primary field samples that are collected by a sampling team and sent to an independent QA laboratory for analysis (i.e., USGS). The QA split sample results are used by the DA for the detection of problems with field sampling, documentation, packaging, or shipping procedures as well as the primary laboratory's analytical procedures, calculations, or reporting procedures.

The USGS shall analyze using in-house laboratory capability or use a subcontract laboratory(s), as necessary, for the analysis of six (6) water samples. The samples shall be analyzed as described in Table 1. Table 1 presents the analytical parameters, analytical methods, reporting limits and the agreed upon costs.

As stated above, the following samples will be collected in support of the ASR Pilot Projects.

  • One groundwater sample will be collected in support of the exploratory wells;
  • Three surface water samples will be collected in support of quarterly sampling; and,
  • Two surface water samples will be collected in support of storm water sampling.

Additional requirements and assumptions for the project:

  • USGS will provide sufficient sample coolers and chain of custody forms;
  • The DA's sampling contractor will provide the necessary sample containers;
  • Sufficient notice will be provided to USGS for forwarding sample coolers and chain of custody forms;
  • It is possible that one sample at a time will be collected and submitted to USGS for analysis. Therefore, there is no minimum number of samples to be submitted for analysis associated with a specific sampling event. However, there will be a total number of six (6) samples submitted to the USGS for analysis for the duration of the task order;
  • Since rainfall and their associated storms cannot be predicted, the DA's sampling contractor for collection of a storm water sample must maintain a minimum of one sample cooler. Also, for the storm water samples, approximately a 24-hour notice will be provided that samples will be submitted to the laboratory for analysis.
  • The DA's sampling contractor will pay for all shipping costs for delivering the analytical samples from the field to the USGS Ocala Laboratory.

Task 2 - Summary Report

Duration - Provide a summary report no later that 45 days from receipt of the primary data from the DA.

The DA will provide the USGS with a copy of the primary sample data results for the corresponding QA split sample. The DA should forward to USGS a copy of the analytical results of the primary samples within 50 days of sample collection of the last sample associated with a sampling event. However, submittal of said analytical results to the USGS is contingent on receiving the data from its contractor.

The USGS shall provide a side-by-side comparison of the analytical results of the DA's contractor and USGS laboratory QA split sample results for the analyses outlined on Table 1. The comparison of the analytical data should include but not be limited to the following:

  • Comparison of the analytical methods utilized by both Agencies;
  • A side-by-side comparison of the analytical results;
  • A statistical determination of the comparability of the results, per analyte and as a whole sample;
  • Provide a brief summary of the findings; and,
  • Submit a report to the DA in a standard USGS format.

Evaluation criteria for the analytical results will be derived from concepts found in:

  • Handbook for Analytical Quality Control in Water and Wastewater Laboratories, EPA-600/4-79-019, and
  • Course notes from: Quality Control Sample Design and Interpretation, Terry Schertz, August 1996.

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Last updated: 04 September, 2013 @ 02:08 PM(KP)