Sampling Process Design. 5.1 Sampling Design and Rationale Nutrient introduction into Lake Xxxxxx has been identified as a primary cause for promoting nuisance algal blooms caused by periodic high total phosphorus concentrations during portions of the year. Following almost two decades of phosphorus reduction efforts, concentrations of this nutrient are generally being met throughout the year. The Washington Department of Ecology (Ecology) and the City of Black Diamond have expended effort in fixing some of the obvious source problems for nutrient in the drainage; primarily on-site septic systems and drainage from a wetland originally expected to treat effluent discharged from a wastewater treatment plant. Other basin-wide implementation measures have been identified by the Department of Ecology (WSDOE 2009). The Villages MPD permit approval includes conditions to identify the estimated maximum annual volume of total phosphorus from the MPD site and that will comply with the TMDL for Lake Xxxxxx, and to monitor phosphorus coming from the MPD site. The sampling design and rationale presented are intended to provide information that can be used in an adaptive management program and continually update/upgrade the phosphorus monitoring program. The sampling design meets the requirements from the City of Black Diamond as Conditions of Approval for the Xxxxxx Hills Master Planned Development approval (Exhibit C: Conditions 76, 82, and 85) that monitoring of the stormwater treatment facility and the influence on receiving water be described. Exceedence of the allowable estimated maximum annual volume of total phosphorus discharged from the Development site will require a redesign of existing structures, modify the design of new treatment facilities, or implementation of another project in the Lake Xxxxxx basin that results in a reduction in total phosphorus so the annual maximum load is below the target quantity outlined in the Condition. The proposed monitoring strategy addresses each of the potential sources of non-point nutrient total phosphorus contributions and methods that would detect presence of this pollutant and directly address tasks described in Section 2.0. The Sampling Process Design is described here based on each of these tasks:
Sampling Process Design. The sampling process design is a detailed data collection plan that provides information to satisfy the project DQOs. The sampling process design includes a description of the number, type, location, and frequency of samples to be collected (by matrix ), as well as the technical rationale for the collection of the proposed data. Th e sampling design is specific to each project and is presented in the facility -specific Work Plan . As applicable to the project scope, the sampling process design will include: The technical rationale, consistent with the DQOs, for sampling locations, numb er of samples, frequency of sampling, sample media, target analytes, and project screening levels. A discussion of how data will be used to support critical project decisions . A description of sample collection techniques, especially non -standard technique s, and strategies that will be used and how these techniques and strategies meet both project technical and scheduling requirements . A summary of the assumptions used in the development and selection of the proposed sampling methodologies by matri x. Field sampling and other activities and operations should be developed so that these processes provide reliable information that meets the project objectives. The guidance documents presented in Section 2.9.2.1 of this document may be consulted for development of the sampling rationale and specific field sampling protocols . Additional documents include: Soil Sampling Quality Assurance User’s Guide – Section Edition (USEPA, 1989) Preparation of Soil Sampling Protocols: Sampling Techniques and Strategies (USEPA, 1992) Superfund Program Representative Sampling Guidance - Volume 1: Soil Interim Final (USEPA, 1995) Guidance for Choosing a Sampling Design for Environmental Data Collection (QA/ 5 S) (USEPA, 2002) The essential information that shall be included in the samp ling process design will include : The type of design (e.g., systematic or judgmental ). Sample numbers and proposed locations . Media to be sampled . Justification for the selected sampling design in terms of the project DQOs . The sampling process design w ill be presented in the facility -specific work plan . The requested format of the w ork plan wa s presented in Section 2.0. Facility -specific work plan s will include a section equivalent to a field sampling plan that will describe the planned field and quality c ontrol activities . The use of SOPs for routinely performed tasks is ...
Sampling Process Design. 7.1 Study design The project objectives will be met through characterizing seasonal temperature in the side channels. Continuous temperature data collection will be required for future analysis to assess suitability of habitat for salmon. Monitoring will occur July 2016 to October 2017.
