Spokane River Toxics Reduction Strategy Study February 25, 2014 - - PowerPoint PPT Presentation

Spokane River Toxics Reduction Strategy Study

February 25, 2014

Presentation Outline

• Sampling and Analysis Plan
• Quality Assurance Project Plan

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Sampling and Analysis Plan

• Project Organization
• Project Description
• Field Methods and Procedures
• Sample Handling and Storage
• Sample Documentation
• Quality Assurance/Quality Control

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Project Organization

• To be decided

– Project Manager – Technical Advisor – QA Officer – Field Manager – Lab Technical Director – Lab QA/QC Manager

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Project Description

• Purpose – collect necessary data to eliminate

the data gaps in order to conduct a PCB mass balance assessment

• Phase 1:

– Review data/identify data gaps – Prepare monitoring plan to address data gaps – Prepare refined SOW for subsequent phases

• Phase 2

– Implement the monitoring plan

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Project Description

• Phase 3

– Analyze the collected data – Characterize PCB sources

• Phase 4

– Assess potential BMPs – Develop Comprehensive Plan

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Data Collection – 1st Year

• Confidence Testing
• Synoptic Study
• Seasonally Integrated Sampling

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Confidence Testing

• Conducted before March 31st
• Samples collected at Lake Coeur d’Alene outlet
• Grab samples collected on 5 days
• Duplicate collected and analyzed each sampling day
• 1 sample each day to be composited
• Analyze for:

– PCB congeners – TOC – DOC – TSS – TDS

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Synoptic Survey

• Conducted during summer low flow period
• Samples collected at:

– River locations with flow gaging stations (7 locations) – NPDES permitted dischargers (8 locations) – Hangman Creek mouth

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Synoptic Survey

• Gage locations ‐ samples collected every other

day over 2 week period

• Dischargers – samples collected on 3 separate

days

• Samples collected:

– Individual grab – Sample for composite

• Parameters: PCB, TSS, TDS, TOC, DOC

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Seasonally Integrated Sampling

• Sampling conducted:

– Spring high flow – Summer low flow (covered by Synoptic Survey) – Winter moderate flow

• Samples collected at Lake Coeur d’Alene outlet
• Samples collected on 5 separate days – 2 days

between events

• Samples collected:

– Individual grab – Sample for composite

• Parameters: PCB, TSS, TDS, TOC, DOC

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Seasonally Integrated Sampling

• Sampling conducted:

– Spring high flow – Summer low flow (covered by Synoptic Survey) – Winter moderate flow

• Samples collected at Lake Coeur d’Alene outlet
• Samples collected on 5 separate days – 2 days

between events

• Samples collected:

– Individual grab – Sample for composite

• Parameters: PCB, TSS, TDS, TOC, DOC

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Field Methods and Procedures

• Samples collected in accordance with EPA

Method 1669

– 2 person team – Clean hands/dirty hands

• River samples:

– Direct immersion or Dip sampler – Use clean bottle/do not reuse

• Discharger Samples – 24 hour composite

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Sample Handling, Storage and Shipment

• Samples clearly labeled
• Stored at 4 degrees C
• Bottles specified
• Shipping instructions

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Sample Documentation

• Field Forms
• Calibration records
• Chain of Custody

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Quality Assurance Project Plan

• Data Quality Objectives
• Analytical Methods
• Quality Control
• Assessment and Oversight
• Data Validation and Usability

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Data Quality Objectives

• Accuracy – estimate of total error from a single

measurement

– Lab control samples ‐ % recovery

• Precision – measure of reproducibility

– Matrix spikes/matrix spike duplicate

• Representativeness – sample data accurately reflect the

characteristics of the population of samples

– Follow procedures

• Completeness – measure of amount of valid data compared

to what was planned

• Comparability – confidence in the comparison of one

dataset to another

– Maintain standard techniques and procedures

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Analytical Methods

• PCB – EPA Method 1668C
• Total Organic Carbon – EPA Method 415.1
• Dissolved Organic Carbon – EPA Method 415.3
• Total Suspended Solids – EPA Method 160.2
• Total Dissolved Solids – EPA Method 160.1

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Quality Control Samples

• Lab QC

– Method blanks

• 1 per sample batch
• Monitors background contamination
• Samples flagged if less than 3 times the blank concentration

– Laboratory control samples

• 1 per sample batch
• Reagent water spiked with analytes of known concentration

– Lab duplicate

• 1 per sample batch
• Split sample to measure precision of analytical method

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Quality Control Samples

• Lab QC – PCB

– Labeled compounds

• Carbon 13 isotopes
• Spiked into all field and lab samples at different points

in the process

• % recovery

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Quality Control Samples

• Field QC

– Replicate

• Collected for every sample – stored
• Analyzed 1 in 10

– Equipment/field blanks – 1 in 20 samples – Trip blank

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Data Validation

• Data Verification

– Screen field data sheets – Review chain of custody documentation – Screen lab data sheets – Examine calibration and QC data daily

• Data Validation

– Evaluate data against the Data Quality Objectives – Data flagged

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