Sample Collection and Laboratory Analysis. Wood will collect samples at 23 stormwater lakes and three pump stations each month for one year. The sample collection schedule will be coordinated according to the City of Naples Naples Bay water quality monitoring. In- situ water quality measurements will be recorded alongside sample collection and will include temperature, pH, dissolved oxygen (mg/L and % saturation), and conductivity/salinity. Water quality meters (i.e. YSI) will be calibrated and maintained according to FDEP SOPs. Samples will be collected according to FDEP SOPs. After proper preservation (i.e. acidification or filtration) immediately after collection, samples will be placed on ice and transported to the analytical laboratory within analytical hold times. To meet QA/QC requirements, Wood will collect one equipment blank per monthly event for all parameters except fecal indicator bacteria, biological (chlorophyll-a), and physical/aggregate parameters (hardness, color, turbidity). Figure 1 - City of Naples stormwater lake and pump station locations. Table 1 lists the water quality parameters that will be analyzed in each sample, the analytical methods, and detection limits. Copper concentrations will be reported as hardness-dependent concentrations. The standard laboratory turnaround time for receipt of data is 7 10 days. The laboratory will deliver the data in an Excel spreadsheet in a format as directed by the City (i.e. WIN, Adapt, etc.). Table 1 - Water Quality Sample Analytical Information Analyte Method Detection Limit Total Kjeldahl Nitrogen 351.2 0.05 mg/L Nitrate + Nitrite Nitrogen Systea 1-reagent 0.006 mg/L Nitrite SM4500-NO2B 0.003 mg/L Nitrate Calculation 0.006 mg/L Ammonia Nitrogen 350.1 0.008 mg/L Total Nitrogen Calculation 0.05mg/L Total Phosphorus 365.3 0.008 mg/L Total Hardness SM2340C 0.682 mg/L Color/pH SM2120B 2.5 CU Turbidity 180.1 0.11 NTU Ortho-Phosphorus 365.3 0.002 mg/L Total Suspended Solids SM2540D 0.570 mg/L Copper SM3113B/MIBK 0.346/0.271 mg/L Chlorophyll a* 445.0 0.25 ug/L Fecal Coliform (MF) SM2540C #/100 xX X.coli (MPN) SM9223B (quantitray) #/100 mL Enterococci EPA 1600 #/100 mL *Stormwater lake sample only Samples will be collected in one day using two sampling teams. The two teams will work separate routes, splitting the sampling and coordinating a single lab drop off for the end of the day. Wood also obtained quotes from two analytical laboratories: Benchmark EnviroAnalytical, Inc. (Benchmark) and Xxxxxxx Laboratories, Inc. (Xxxxxxx), included in Att...
Sample Collection and Laboratory Analysis. Sediment cores would be collected using a vibracore by Anchor QEA and our subcontractor Leviathan Environmental Services from 13 locations within three dredge units. Enough sediment would be collected and archived to characterize sediments for in-Bay disposal or placement at Montezuma according to the approved SAP. Reference sediment would be collected from the SF-9 reference site. November 26, 2018 Individual core samples and Z-layer samples would be archived from each core. Depending on composite sediment chemistry results, limited chemical analysis of these samples may be required. An individual core sample would only be analyzed if there is a need to refine the dredge areas based on elevated chemistry values. A Z-layer sample would only be analyzed to characterize the newly exposed surface layer if the dredged sediment exhibited elevated chemical concentrations. These additional analyses would only be conducted if requested by DMMO. Additional analysis of individual core samples and Z-layer samples is not included in this cost estimate. In accordance with DMMO guidelines, three composite samples would be submitted for physical and chemical analyses and biological testing to determine suitability for in-Bay disposal and placement at Montezuma. Sediment chemistry would include total solids, total organic carbon, grain size, metals, organotins, polycyclic aromatic hydrocarbons, organochlorine pesticides, and polychlorinated biphenyls. Biological testing for in-Bay disposal would include two solid phase tests and one suspended particulate phase test. During solid phase biological testing, reference sediment would be tested concurrently with composite samples for comparative purposes. Additional analysis for placement at Montezuma would include modified elutriate chemistry and bioassay testing. Anchor QEA would perform data validation to ensure laboratory analyses meet the project data quality objectives.
Sample Collection and Laboratory Analysis. 4.1.1 The purpose of the elutriate test is to simulate the release of dissolved contaminants from dredging operations.
