{"id":92659,"date":"2026-06-30T02:23:57","date_gmt":"2026-06-30T02:23:57","guid":{"rendered":"https:\/\/gaeatech.com\/knowledge-center\/?p=92659"},"modified":"2026-06-26T02:25:14","modified_gmt":"2026-06-26T02:25:14","slug":"preventing-voc-sampling-errors","status":"publish","type":"post","link":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/","title":{"rendered":"Preventing VOC Sampling Errors"},"content":{"rendered":"\n<h1 id=\"h-best-practices-for-accurate-volatile-organic-compound-sampling-in-environmental-investigations\" class=\"wp-block-heading\">Best Practices for Accurate Volatile Organic Compound Sampling in Environmental Investigations<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Volatile Organic Compounds (VOCs) are among the most frequently analyzed contaminants during environmental site assessments, groundwater investigations, landfill monitoring, industrial compliance programs, and remediation projects. Because VOCs readily evaporate into the atmosphere, they are also among the easiest contaminants to lose during sampling, handling, transportation, and laboratory preparation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike many inorganic contaminants, VOC concentrations can change significantly if proper sampling procedures are not followed. A sample exposed to air for only a few seconds may lose a measurable portion of its volatile constituents. Improper sample containers, excessive agitation, delayed preservation, or inadequate quality control procedures can all produce laboratory results that no longer represent actual site conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These errors can have significant consequences. Underestimating contamination may result in incomplete remediation or regulatory non-compliance, while overestimating contamination can lead to unnecessary cleanup costs, project delays, and disputes with regulators or property owners.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A comprehensive Quality Assurance and Quality Control (QA\/QC) program is therefore essential for every VOC investigation. From borehole drilling and sample collection to chain of custody, laboratory analysis, and data validation, every step must be carefully controlled.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This article examines common sources of VOC sampling errors and presents best practices for preventing them throughout the environmental investigation process.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-why-voc-sampling-is-different\" class=\"wp-block-heading\">Why VOC Sampling Is Different<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Most environmental samples remain relatively stable during collection and transportation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">VOC samples do not.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Volatile compounds naturally evaporate when exposed to air, making them particularly sensitive to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temperature changes<\/li>\n\n\n\n<li>Sample agitation<\/li>\n\n\n\n<li>Delayed preservation<\/li>\n\n\n\n<li>Container selection<\/li>\n\n\n\n<li>Air exposure<\/li>\n\n\n\n<li>Improper handling<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Maintaining sample integrity requires strict adherence to standardized procedures.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-common-sources-of-voc-sampling-errors\" class=\"wp-block-heading\">Common Sources of VOC Sampling Errors<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Understanding where errors occur is the first step toward preventing them.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-air-exposure\" class=\"wp-block-heading\">Air Exposure<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Perhaps the most common source of VOC loss is exposure to air.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Opening containers for extended periods or allowing soil samples to remain uncovered permits volatile compounds to escape.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Even brief exposure can alter analytical results.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-sample-agitation\" class=\"wp-block-heading\">Sample Agitation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Excessive mixing, shaking, or transferring samples increases volatilization.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Field personnel should minimize unnecessary sample handling.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-temperature\" class=\"wp-block-heading\">Temperature<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">VOC samples should remain cool from collection until laboratory receipt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Elevated temperatures accelerate evaporation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Improper cooling is a frequent cause of sample degradation.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-delayed-preservation\" class=\"wp-block-heading\">Delayed Preservation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Many VOC analytical methods require immediate preservation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Delays increase the likelihood of concentration changes.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-improper-containers\" class=\"wp-block-heading\">Improper Containers<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">VOC samples should only be collected using approved containers specified by the laboratory and analytical method.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Incorrect containers may:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Allow leakage<\/li>\n\n\n\n<li>Permit volatilization<\/li>\n\n\n\n<li>Introduce contamination<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-qa-begins-before-sampling\" class=\"wp-block-heading\">QA Begins Before Sampling<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Successful VOC investigations begin during project planning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quality Assurance should establish:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sampling objectives<\/li>\n\n\n\n<li>Analytical methods<\/li>\n\n\n\n<li>Required detection limits<\/li>\n\n\n\n<li>Sampling locations<\/li>\n\n\n\n<li>Equipment requirements<\/li>\n\n\n\n<li>Preservation procedures<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Planning reduces field uncertainty and improves consistency.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-borehole-drilling-qa-qc\" class=\"wp-block-heading\">Borehole Drilling QA\/QC<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Drilling methods influence VOC sample quality.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Improper drilling techniques may:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mix soil intervals<\/li>\n\n\n\n<li>Introduce contaminants<\/li>\n\n\n\n<li>Increase volatilization<\/li>\n\n\n\n<li>Disturb natural stratigraphy<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-selecting-appropriate-drilling-methods\" class=\"wp-block-heading\">Selecting Appropriate Drilling Methods<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The chosen drilling method should minimize disturbance to the target interval.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Factors include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Soil type<\/li>\n\n\n\n<li>Target analytes<\/li>\n\n\n\n<li>Sampling depth<\/li>\n\n\n\n<li>Regulatory requirements<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-equipment-decontamination\" class=\"wp-block-heading\">Equipment Decontamination<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cross-contamination is a common QA concern.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sampling equipment should be thoroughly cleaned between boreholes using documented decontamination procedures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Equipment blanks help verify cleaning effectiveness.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-soil-voc-sampling\" class=\"wp-block-heading\">Soil VOC Sampling<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Collecting representative soil samples requires careful technique.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-minimize-air-exposure\" class=\"wp-block-heading\">Minimize Air Exposure<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Whenever possible:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open containers only when necessary.<\/li>\n\n\n\n<li>Transfer samples immediately.<\/li>\n\n\n\n<li>Cap containers without delay.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-avoid-mixing\" class=\"wp-block-heading\">Avoid Mixing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Composite samples are generally inappropriate for VOC analysis because mixing increases volatilization.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Discrete samples typically provide more representative results.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-fill-containers-properly\" class=\"wp-block-heading\">Fill Containers Properly<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Many laboratory methods require containers to be completely filled.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Headspace allows VOCs to partition into air, reducing measured concentrations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Proper filling techniques reduce this risk.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-groundwater-voc-sampling\" class=\"wp-block-heading\">Groundwater VOC Sampling<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Groundwater VOC sampling introduces additional QA\/QC considerations.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-low-flow-sampling\" class=\"wp-block-heading\">Low-Flow Sampling<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Low-flow sampling reduces:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Turbidity<\/li>\n\n\n\n<li>Aeration<\/li>\n\n\n\n<li>Volatilization<\/li>\n\n\n\n<li>Disturbance<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">It is widely accepted as a best practice for many groundwater investigations.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-stabilization-criteria\" class=\"wp-block-heading\">Stabilization Criteria<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before collecting samples, field parameters such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>pH<\/li>\n\n\n\n<li>Conductivity<\/li>\n\n\n\n<li>Temperature<\/li>\n\n\n\n<li>Dissolved oxygen<\/li>\n\n\n\n<li>Oxidation-reduction potential (ORP)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">should stabilize according to project procedures.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-avoid-aeration\" class=\"wp-block-heading\">Avoid Aeration<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Groundwater should flow gently into sample containers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Splashing increases VOC loss.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-chain-of-custody\" class=\"wp-block-heading\">Chain of Custody<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Every VOC sample should be fully traceable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Chain-of-custody documentation should include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sample ID<\/li>\n\n\n\n<li>Collection date<\/li>\n\n\n\n<li>Collection time<\/li>\n\n\n\n<li>Sampler<\/li>\n\n\n\n<li>Preservation method<\/li>\n\n\n\n<li>Requested analyses<\/li>\n\n\n\n<li>Transfer history<\/li>\n\n\n\n<li>Laboratory receipt<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Incomplete documentation may compromise data defensibility.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-sample-preservation\" class=\"wp-block-heading\">Sample Preservation<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Preservation begins immediately after collection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common preservation practices include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cooling samples to approximately 4\u00b0C<\/li>\n\n\n\n<li>Chemical preservatives where required<\/li>\n\n\n\n<li>Proper storage orientation<\/li>\n\n\n\n<li>Rapid transportation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Holding times should never be exceeded.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-holding-times\" class=\"wp-block-heading\">Holding Times<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">VOC analytical methods specify maximum holding times between collection and laboratory analysis.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Late analysis may invalidate results.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Organizations should monitor:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Collection time<\/li>\n\n\n\n<li>Shipping time<\/li>\n\n\n\n<li>Laboratory receipt<\/li>\n\n\n\n<li>Analysis completion<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Automated tracking systems can reduce compliance risks.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-laboratory-qa-qc\" class=\"wp-block-heading\">Laboratory QA\/QC<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Laboratory quality control is equally important.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Reliable field sampling cannot compensate for poor analytical practices.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-laboratory-qc-samples\" class=\"wp-block-heading\">Laboratory QC Samples<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Typical QC samples include:<\/p>\n\n\n\n<h3 id=\"h-method-blanks\" class=\"wp-block-heading\">Method Blanks<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Detect laboratory contamination.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 id=\"h-laboratory-control-samples\" class=\"wp-block-heading\">Laboratory Control Samples<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Verify analytical accuracy.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 id=\"h-matrix-spikes\" class=\"wp-block-heading\">Matrix Spikes<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Evaluate matrix effects.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 id=\"h-duplicate-analyses\" class=\"wp-block-heading\">Duplicate Analyses<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Measure analytical precision.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 id=\"h-surrogate-recoveries\" class=\"wp-block-heading\">Surrogate Recoveries<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Confirm method performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These QC measures help ensure laboratory reliability.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-field-qa-qc-samples\" class=\"wp-block-heading\">Field QA\/QC Samples<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Environmental investigations should include field quality control samples.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-field-duplicates\" class=\"wp-block-heading\">Field Duplicates<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Evaluate sampling precision.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-trip-blanks\" class=\"wp-block-heading\">Trip Blanks<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Trip blanks detect contamination during transportation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">They are especially important for VOC investigations because of the sensitivity of volatile compounds.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-equipment-blanks\" class=\"wp-block-heading\">Equipment Blanks<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Equipment blanks verify that cleaning procedures are effective.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-field-blanks\" class=\"wp-block-heading\">Field Blanks<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Field blanks identify contamination introduced during field activities.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Together, these samples provide confidence in environmental results.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-data-validation\" class=\"wp-block-heading\">Data Validation<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">VOC analytical data should never be accepted without review.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Validation verifies that results meet project quality requirements.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-automated-validation\" class=\"wp-block-heading\">Automated Validation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Modern environmental databases can automatically identify:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Missing VOC analyses<\/li>\n\n\n\n<li>Duplicate sample IDs<\/li>\n\n\n\n<li>Holding time exceedances<\/li>\n\n\n\n<li>Missing preservation<\/li>\n\n\n\n<li>Incomplete chain of custody<\/li>\n\n\n\n<li>Laboratory reporting inconsistencies<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Automation improves both speed and consistency.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-cross-dataset-validation\" class=\"wp-block-heading\">Cross-Dataset Validation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Additional QA checks compare related information.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Examples include:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Comparison<\/th><th>Validation<\/th><\/tr><\/thead><tbody><tr><td>Sample depth vs borehole depth<\/td><td>Valid interval<\/td><\/tr><tr><td>VOC sample vs lithology<\/td><td>Appropriate sampling location<\/td><\/tr><tr><td>Groundwater sample vs well construction<\/td><td>Screen interval confirmed<\/td><\/tr><tr><td>Laboratory report vs chain of custody<\/td><td>Matching sample IDs<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These relationships strengthen overall data quality.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-metadata-matters\" class=\"wp-block-heading\">Metadata Matters<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Accurate VOC investigations require detailed metadata.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Examples include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sampling method<\/li>\n\n\n\n<li>Drill rig<\/li>\n\n\n\n<li>Weather conditions<\/li>\n\n\n\n<li>Preservation method<\/li>\n\n\n\n<li>Sampler<\/li>\n\n\n\n<li>Instrument calibration<\/li>\n\n\n\n<li>Laboratory method<\/li>\n\n\n\n<li>Detection limits<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Metadata often becomes critical during regulatory reviews.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-workflow-management\" class=\"wp-block-heading\">Workflow Management<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Successful VOC programs follow structured workflows.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A recommended process includes:<\/p>\n\n\n\n<h3 id=\"h-step-1\" class=\"wp-block-heading\">Step 1<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Develop sampling plan.<\/p>\n\n\n\n<h3 id=\"h-step-2\" class=\"wp-block-heading\">Step 2<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Verify equipment calibration.<\/p>\n\n\n\n<h3 id=\"h-step-3\" class=\"wp-block-heading\">Step 3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Collect samples using approved procedures.<\/p>\n\n\n\n<h3 id=\"h-step-4\" class=\"wp-block-heading\">Step 4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Preserve samples immediately.<\/p>\n\n\n\n<h3 id=\"h-step-5\" class=\"wp-block-heading\">Step 5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Complete chain of custody.<\/p>\n\n\n\n<h3 id=\"h-step-6\" class=\"wp-block-heading\">Step 6<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ship under controlled conditions.<\/p>\n\n\n\n<h3 id=\"h-step-7\" class=\"wp-block-heading\">Step 7<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Receive laboratory results.<\/p>\n\n\n\n<h3 id=\"h-step-8\" class=\"wp-block-heading\">Step 8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Run automated validation.<\/p>\n\n\n\n<h3 id=\"h-step-9\" class=\"wp-block-heading\">Step 9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Technical review.<\/p>\n\n\n\n<h3 id=\"h-step-10\" class=\"wp-block-heading\">Step 10<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Approve data for reporting.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Standardized workflows reduce variability and improve consistency.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-audit-trails\" class=\"wp-block-heading\">Audit Trails<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Environmental investigations frequently become subject to regulatory review or litigation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Audit trails should record:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sample creation<\/li>\n\n\n\n<li>Data entry<\/li>\n\n\n\n<li>Validation<\/li>\n\n\n\n<li>Review<\/li>\n\n\n\n<li>Approval<\/li>\n\n\n\n<li>Corrections<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This documentation demonstrates that QA\/QC procedures were followed.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-data-governance\" class=\"wp-block-heading\">Data Governance<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Effective VOC QA\/QC requires strong governance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Organizations should define:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sampling responsibilities<\/li>\n\n\n\n<li>Approval authority<\/li>\n\n\n\n<li>Validation requirements<\/li>\n\n\n\n<li>Data retention policies<\/li>\n\n\n\n<li>Revision procedures<\/li>\n\n\n\n<li>User permissions<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Governance ensures consistency across projects and personnel.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-common-voc-qa-qc-mistakes\" class=\"wp-block-heading\">Common VOC QA\/QC Mistakes<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Recurring issues include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Headspace in sample containers<\/li>\n\n\n\n<li>Warm samples during transport<\/li>\n\n\n\n<li>Missing trip blanks<\/li>\n\n\n\n<li>Incorrect preservatives<\/li>\n\n\n\n<li>Exceeded holding times<\/li>\n\n\n\n<li>Duplicate sample IDs<\/li>\n\n\n\n<li>Poor chain-of-custody documentation<\/li>\n\n\n\n<li>Incorrect laboratory methods<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many of these problems are preventable through training and automated validation.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-digital-environmental-databases\" class=\"wp-block-heading\">Digital Environmental Databases<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Modern environmental databases provide significant advantages for VOC investigations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Capabilities include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sample tracking<\/li>\n\n\n\n<li>Chain-of-custody management<\/li>\n\n\n\n<li>Automated validation<\/li>\n\n\n\n<li>Laboratory imports<\/li>\n\n\n\n<li>GIS integration<\/li>\n\n\n\n<li>Audit trails<\/li>\n\n\n\n<li>Electronic approvals<\/li>\n\n\n\n<li>Regulatory reporting<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These tools improve both efficiency and data quality.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-emerging-technologies\" class=\"wp-block-heading\">Emerging Technologies<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">VOC QA\/QC continues to evolve.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Emerging technologies include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mobile field data collection<\/li>\n\n\n\n<li>Barcode sample tracking<\/li>\n\n\n\n<li>RFID chain-of-custody systems<\/li>\n\n\n\n<li>AI-assisted anomaly detection<\/li>\n\n\n\n<li>Real-time laboratory integration<\/li>\n\n\n\n<li>Automated reporting dashboards<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These innovations reduce manual errors while improving traceability.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-best-practices-summary\" class=\"wp-block-heading\">Best Practices Summary<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Organizations can significantly improve VOC data quality by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Planning investigations carefully before fieldwork.<\/li>\n\n\n\n<li>Selecting appropriate drilling and sampling methods.<\/li>\n\n\n\n<li>Minimizing air exposure during sample collection.<\/li>\n\n\n\n<li>Avoiding unnecessary agitation.<\/li>\n\n\n\n<li>Preserving samples immediately.<\/li>\n\n\n\n<li>Maintaining cold-chain transportation.<\/li>\n\n\n\n<li>Using trip blanks, field blanks, duplicates, and equipment blanks.<\/li>\n\n\n\n<li>Validating laboratory and field data automatically.<\/li>\n\n\n\n<li>Maintaining complete audit trails and chain-of-custody records.<\/li>\n\n\n\n<li>Storing environmental information in structured databases with formal QA\/QC workflows.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"h-conclusion\" class=\"wp-block-heading\">Conclusion<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Preventing VOC sampling errors requires careful attention to every stage of the environmental investigation process. Because volatile organic compounds are highly sensitive to handling, even small deviations from established procedures can significantly affect analytical results and subsequent engineering or regulatory decisions. By combining standardized sampling techniques, rigorous preservation procedures, comprehensive quality control samples, automated validation, structured workflows, and strong data governance, organizations can greatly improve the accuracy, reliability, and legal defensibility of VOC investigations. As environmental regulations become increasingly data-driven, robust QA\/QC practices will continue to be essential for protecting public health, supporting sound remediation decisions, and maintaining confidence in environmental monitoring programs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Best Practices for Accurate Volatile Organic Compound Sampling in Environmental Investigations Volatile Organic Compounds (VOCs) are among the most frequently analyzed contaminants during environmental site assessments, groundwater investigations, landfill monitoring, industrial compliance programs, and remediation projects. Because VOCs readily evaporate into the atmosphere, they are also among the easiest contaminants to lose during sampling, handling, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":92660,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[792,1880],"tags":[1903,1610,1598,1611,66,292,1938,526,194,285,393,1970,283,1973,1974],"class_list":["post-92659","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-borehole-data-management","category-borehole-qa-qc","tag-borehole-qa-qc-2","tag-chain-of-custody","tag-contaminated-sites","tag-data-validation","tag-environmental-compliance","tag-environmental-investigations","tag-environmental-qa-qc","tag-environmental-sampling","tag-geotechnical-software","tag-groundwater-monitoring","tag-groundwater-sampling","tag-laboratory-qa-qc","tag-soil-sampling","tag-voc-sampling","tag-volatile-organic-compounds"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Preventing VOC Sampling Errors - Knowledge Center<\/title>\n<meta name=\"description\" content=\"Explore best practices for preventing VOC sampling errors in environmental investigations to ensure accurate results.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Preventing VOC Sampling Errors\" \/>\n<meta property=\"og:description\" content=\"Explore best practices for preventing VOC sampling errors in environmental investigations to ensure accurate results.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/\" \/>\n<meta property=\"og:site_name\" content=\"Knowledge Center\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.linkedin.com\/company\/2663277\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-06-30T02:23:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/06\/preventing-voc-sampling-errors-hero.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1536\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"GAEA Technologies\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"GAEA Technologies\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/\"},\"author\":{\"name\":\"GAEA Technologies\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/person\\\/940fb5fed6e95dd9d0ec1370207f5dba\"},\"headline\":\"Preventing VOC Sampling Errors\",\"datePublished\":\"2026-06-30T02:23:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/\"},\"wordCount\":1444,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/preventing-voc-sampling-errors-hero.jpg\",\"keywords\":[\"borehole qa qc\",\"Chain of Custody\",\"contaminated sites\",\"Data Validation\",\"environmental compliance\",\"environmental investigations\",\"environmental QA QC\",\"Environmental Sampling\",\"geotechnical software\",\"groundwater monitoring\",\"groundwater sampling\",\"laboratory QA QC\",\"soil sampling\",\"VOC sampling\",\"volatile organic compounds\"],\"articleSection\":[\"Borehole Data Management\",\"QA\\\/QC\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/\",\"name\":\"Preventing VOC Sampling Errors - Knowledge Center\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/preventing-voc-sampling-errors-hero.jpg\",\"datePublished\":\"2026-06-30T02:23:57+00:00\",\"description\":\"Explore best practices for preventing VOC sampling errors in environmental investigations to ensure accurate results.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/#primaryimage\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/preventing-voc-sampling-errors-hero.jpg\",\"contentUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/preventing-voc-sampling-errors-hero.jpg\",\"width\":1536,\"height\":1024,\"caption\":\"A complete QA\\\/QC workflow for volatile organic compound (VOC) sampling, illustrating best practices for sample collection, preservation, laboratory analysis, validation, and regulatory compliance.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/preventing-voc-sampling-errors\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Preventing VOC Sampling Errors\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#website\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/\",\"name\":\"GAEA Technologies Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#organization\",\"name\":\"GAEA Technologies\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Gaea_3dlogo_white-scaled.jpg\",\"contentUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Gaea_3dlogo_white-scaled.jpg\",\"width\":2560,\"height\":1440,\"caption\":\"GAEA Technologies\"},\"image\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.linkedin.com\\\/company\\\/2663277\\\/\"],\"description\":\"GAEA Technologies develops and distributes geoscience and engineering solutions worldwide. Our solutions have been used for over 30 years by companies and organizations around the world.\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/person\\\/940fb5fed6e95dd9d0ec1370207f5dba\",\"name\":\"GAEA Technologies\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g\",\"caption\":\"GAEA Technologies\"},\"sameAs\":[\"https:\\\/\\\/gaeatech.com\\\/wordpress\"],\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/author\\\/mfraser\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Preventing VOC Sampling Errors - Knowledge Center","description":"Explore best practices for preventing VOC sampling errors in environmental investigations to ensure accurate results.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/","og_locale":"en_US","og_type":"article","og_title":"Preventing VOC Sampling Errors","og_description":"Explore best practices for preventing VOC sampling errors in environmental investigations to ensure accurate results.","og_url":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/","og_site_name":"Knowledge Center","article_publisher":"https:\/\/www.linkedin.com\/company\/2663277\/","article_published_time":"2026-06-30T02:23:57+00:00","og_image":[{"width":1536,"height":1024,"url":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/06\/preventing-voc-sampling-errors-hero.jpg","type":"image\/jpeg"}],"author":"GAEA Technologies","twitter_card":"summary_large_image","twitter_misc":{"Written by":"GAEA Technologies","Est. reading time":"7 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/#article","isPartOf":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/"},"author":{"name":"GAEA Technologies","@id":"https:\/\/gaeatech.com\/knowledge-center\/#\/schema\/person\/940fb5fed6e95dd9d0ec1370207f5dba"},"headline":"Preventing VOC Sampling Errors","datePublished":"2026-06-30T02:23:57+00:00","mainEntityOfPage":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/"},"wordCount":1444,"commentCount":0,"publisher":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/#organization"},"image":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/#primaryimage"},"thumbnailUrl":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/06\/preventing-voc-sampling-errors-hero.jpg","keywords":["borehole qa qc","Chain of Custody","contaminated sites","Data Validation","environmental compliance","environmental investigations","environmental QA QC","Environmental Sampling","geotechnical software","groundwater monitoring","groundwater sampling","laboratory QA QC","soil sampling","VOC sampling","volatile organic compounds"],"articleSection":["Borehole Data Management","QA\/QC"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/","url":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/","name":"Preventing VOC Sampling Errors - Knowledge Center","isPartOf":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/#website"},"primaryImageOfPage":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/#primaryimage"},"image":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/#primaryimage"},"thumbnailUrl":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/06\/preventing-voc-sampling-errors-hero.jpg","datePublished":"2026-06-30T02:23:57+00:00","description":"Explore best practices for preventing VOC sampling errors in environmental investigations to ensure accurate results.","breadcrumb":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/#primaryimage","url":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/06\/preventing-voc-sampling-errors-hero.jpg","contentUrl":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/06\/preventing-voc-sampling-errors-hero.jpg","width":1536,"height":1024,"caption":"A complete QA\/QC workflow for volatile organic compound (VOC) sampling, illustrating best practices for sample collection, preservation, laboratory analysis, validation, and regulatory compliance."},{"@type":"BreadcrumbList","@id":"https:\/\/gaeatech.com\/knowledge-center\/preventing-voc-sampling-errors\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/gaeatech.com\/knowledge-center\/"},{"@type":"ListItem","position":2,"name":"Preventing VOC Sampling Errors"}]},{"@type":"WebSite","@id":"https:\/\/gaeatech.com\/knowledge-center\/#website","url":"https:\/\/gaeatech.com\/knowledge-center\/","name":"GAEA Technologies Blog","description":"","publisher":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/gaeatech.com\/knowledge-center\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/gaeatech.com\/knowledge-center\/#organization","name":"GAEA Technologies","url":"https:\/\/gaeatech.com\/knowledge-center\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/gaeatech.com\/knowledge-center\/#\/schema\/logo\/image\/","url":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2025\/12\/Gaea_3dlogo_white-scaled.jpg","contentUrl":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2025\/12\/Gaea_3dlogo_white-scaled.jpg","width":2560,"height":1440,"caption":"GAEA Technologies"},"image":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.linkedin.com\/company\/2663277\/"],"description":"GAEA Technologies develops and distributes geoscience and engineering solutions worldwide. Our solutions have been used for over 30 years by companies and organizations around the world."},{"@type":"Person","@id":"https:\/\/gaeatech.com\/knowledge-center\/#\/schema\/person\/940fb5fed6e95dd9d0ec1370207f5dba","name":"GAEA Technologies","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g","caption":"GAEA Technologies"},"sameAs":["https:\/\/gaeatech.com\/wordpress"],"url":"https:\/\/gaeatech.com\/knowledge-center\/author\/mfraser\/"}]}},"jetpack_featured_media_url":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/06\/preventing-voc-sampling-errors-hero.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/posts\/92659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/comments?post=92659"}],"version-history":[{"count":1,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/posts\/92659\/revisions"}],"predecessor-version":[{"id":92661,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/posts\/92659\/revisions\/92661"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/media\/92660"}],"wp:attachment":[{"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/media?parent=92659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/categories?post=92659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/tags?post=92659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}