{"id":1386,"date":"2023-07-21T18:55:06","date_gmt":"2023-07-21T18:55:06","guid":{"rendered":"https:\/\/www.trccompanies.com\/insights\/understanding-microplastics-in-sediments\/"},"modified":"2024-12-12T09:39:24","modified_gmt":"2024-12-12T09:39:24","slug":"understanding-microplastics-in-sediments","status":"publish","type":"news-and-insights","link":"https:\/\/www.trccompanies.com\/fr\/insights\/understanding-microplastics-in-sediments\/","title":{"rendered":"Understanding Microplastics in Sediments"},"content":{"rendered":"<!-- Start Block: acf\/wysiwyg -->\n\n<section class=\"wysiwyg section-padding bg-white\">\n    <div class=\"container-fluid\">\n        \n        <div class=\"row\">\n                            <div class=\"col-lg-8 columns js-animated-content animated-content\">\n                                        <p class=\"sub-heading\">In the absence of regulatory standards, how can the risk of microplastics in dredged sediment best be managed?<\/p>\n<h2>Microplastic (MP) Sources<\/h2>\n<p>The accumulation of plastic pollution in the environment has rapidly increased in recent decades. Microplastics (MP) are very small pieces of plastic (typically considered to be 1 nanometer to 5 millimeters) that come from a variety of sources. MP sources can be classified into two groups: primary and secondary. Primary MPs are intentionally created within that small size range \u2013 such as exfoliating beads in cosmetics, glitter, or plastic nurdles (tiny plastic pieces that are the building blocks of plastic products). Secondary MP are formed when larger plastic objects degrade into smaller and smaller pieces. Some common sources of secondary MP include synthetic clothing fibers, tire wear particles, micro-films from plastic bags and micro-fragments from packaging materials. The widespread use of plastics in packaging, consumer products and industry has resulted in the spread and accumulation of plastic throughout nearly all corners of the ecosystem.<\/p>\n                <\/div>\n                <div class=\"col-lg-4 columns js-animated-content animated-content\">\n                                        <div class=\"wysiwyg__links js-animated-content animated-content\">\n                        <div class=\"wysiwyg__links__top \">\n                                                        <h4>Related Services<\/h4>\n                                                                                    <ul class=\"js-animated-content animated-content\">\n                                                                <li><a href=\"https:\/\/www.trccompanies.com\/services\/remediation-and-materials-management\/pfas-and-emerging-contaminants\/\" target=\"_self\">PFAS and Emerging Contaminants<\/a><\/li>\n                                                           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acf\/wysiwyg -->\n\n<!-- Start Block: acf\/innerpage-promotion-blocks -->\n\n<section class=\"image-cta\">\n    <img decoding=\"async\" width=\"2121\" height=\"1413\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2023\/07\/GettyImages-1325986187-min.jpg\" class=\"image-cta-bg object-fit\" alt=\"GettyImages-1325986187-min\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2023\/07\/GettyImages-1325986187-min.jpg 2121w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2023\/07\/GettyImages-1325986187-min-300x200.jpg 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2023\/07\/GettyImages-1325986187-min-1024x682.jpg 1024w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2023\/07\/GettyImages-1325986187-min-768x512.jpg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2023\/07\/GettyImages-1325986187-min-1536x1023.jpg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2023\/07\/GettyImages-1325986187-min-2048x1364.jpg 2048w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2023\/07\/GettyImages-1325986187-min-901x600.jpg 901w\" sizes=\"(max-width: 2121px) 100vw, 2121px\" \/>    <div class=\"image-cta-back-curve\">\n        <span class=\"top\"><\/span>\n        <span class=\"bottom\"><\/span>\n        <span class=\"left\"><\/span>\n        <span class=\"right\"><\/span>\n    <\/div>\n    <div class=\"image-cta-front-curve\">\n        <span class=\"top\"><\/span>\n        <span class=\"bottom\"><\/span>\n        <span class=\"left\"><\/span>\n        <span class=\"right\"><\/span>\n    <\/div>\n    <div class=\"image-cta-overlay\">\n        <div class=\"image-cta-content js-animated-content animated-content\">\n            <h2>Learn more about TRC&rsquo;s Remediation Services for Emerging Contaminants\u00a0<\/h2>\n<p><a class=\"btn btn-primary\" href=\"https:\/\/www.trccompanies.com\/services\/remediation-and-materials-management\/remediation-engineering\/\">Learn More<\/a><\/p>\n        <\/div>\n    <\/div>\n<\/section>\n\n<!-- End Block: acf\/innerpage-promotion-blocks -->\n\n<!-- Start Block: acf\/wysiwyg -->\n\n<section class=\"wysiwyg section-padding bg-light-gradient\">\n    <div class=\"container-fluid\">\n                    <div class=\"wysiwyg__wrapper\">\n        \n        <div class=\"row\">\n                        <div class=\"col-lg-12\">\n                                                                                \n                                                <\/div>\n\n                            <div class=\"col-lg-12 js-animated-content animated-content\">\n                    <h2 style=\"text-align: center;\">Transport Pathways in Surface Water and Sediment<\/h2>\n<p><img decoding=\"async\" class=\"wp-image-11998 aligncenter\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/8645e16a-microplastics-blog-graphic.webp\" alt=\"\" width=\"689\" height=\"403\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/8645e16a-microplastics-blog-graphic.webp 865w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/8645e16a-microplastics-blog-graphic-300x175.webp 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/8645e16a-microplastics-blog-graphic-768x449.webp 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/8645e16a-microplastics-blog-graphic-855x500.webp 855w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/8645e16a-microplastics-blog-graphic-700x409.webp 700w\" sizes=\"(max-width: 689px) 100vw, 689px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\">Starting at source areas such as landfills or littered urban areas, both anthropogenic and natural mechanisms such as vehicles, wind and rain can transport plastics into the wider environment. \u00a0Plastics\u2014either in the form of larger macroplastic objects or as MP\u2014can then be swept into a nearby river and transported to a downstream lake, estuary, or ocean.\u00a0 Alternatively, these particles can be deposited into the sediment. However, MP in sediment can also later be resuspended into the surface water from currents or bioturbation, making surface water flow to downgradient receptors a key pathway for MP transport. If the MP continue on through surface water transport, they can move through the water as bed load, suspended load, or floating in the stream current.<\/p>\n                <\/div>\n                                <\/div>\n\n                    <\/div>\n            <\/div>\n<\/section>\n<!-- End Block: acf\/wysiwyg -->\n\n<!-- Start Block: acf\/wysiwyg -->\n\n<section class=\"wysiwyg section-padding bg-white\">\n    <div class=\"container-fluid\">\n        \n        <div class=\"row\">\n                        <div class=\"col-lg-12\">\n                                                                                \n                                                <\/div>\n\n                                                                        <div class=\"col-lg-4 \">\n                                                        <div class=\"js-animated-content animated-content\">\n                                <h3>MP Degradation Mechanisms<\/h3>\n<p>Along these flow paths, macroplastic objects undergo fragmentation and degradation, breaking down into smaller sizes down to the macro- or even nanoscale. Common natural processes that cause this breakdown include abrasion, freeze\/thaw, ultraviolet radiation, biofouling (breakdown by algae), or ingestion by organisms. The fragmentation can create MP in a variety of irregular shapes, ranging from long thin fibers to small, jagged fragments.<\/p>\n<p>MP density and shape strongly affect environmental distribution. Because there are many different polymer types, differences in size, shape and density in MP makes it difficult to predict their fate and transport in the ecosystem. Lighter plastics (e.g., films) tend to float in the water column, while the denser plastics (e.g., tire wear particles) tend to settle into sediment. Studies have also found that MP are more concentrated in clay-dominated as opposed to sand-dominated sediments and in sediments with higher total organic carbon content (<a href=\"https:\/\/mp-1.itrcweb.org\/environmental-distribution-fate-and-transport\/#2_5\">Environmental distribution, fate, and transport \u2013 Microplastics (itrcweb.org)<\/a>). Improving our understanding of how MP move throughout the environment and how they degrade during their lifetime in the ecosystem are essential components in assessing the risks posed by MP in sediment.<\/p>\n                            <\/div>\n                        <\/div>\n                                                                                <div class=\"col-lg-4 columns\">\n                                                        <div class=\"js-animated-content animated-content\">\n                                <h3>USACE Found MP in All Federal Navigable Waterways Sampled<\/h3>\n<p>The\u00a0<a href=\"https:\/\/doi.org\/10.1007\/s00128-019-02762-3\">United States Army Corps of Engineers (USACE) led an investigation<\/a>\u00a0into the occurrence, abundance and polymer composition of MP in sediments collected from nine dredged waterways and two non-dredged reference areas.\u00a0 The locations were spread out throughout the country, ranging from the Great Lakes, the East Coast, the Mississippi River and the Gulf Coast and included both freshwater and marine sites. MP were detected in all sediments examined, with concentrations averaging 1,611 particles per kilogram. Five MP shapes were detected; the most common shape was the fragment group, which occurred in 100% of the samples, followed by fibers, spheres, foams and films.<\/p>\n                            <\/div>\n                        <\/div>\n                                                                                <div class=\"col-lg-4 columns\">\n                                                        <div class=\"js-animated-content animated-content\">\n                                <h3>USACE\u2019s Upcoming Dredging Guidance<\/h3>\n<p>In response to their discoveries in the study outlined above, in 2023 USACE is developing deliverables with the goal of addressing the uncertainty presented by the ubiquitous MP observed during dredging operations with the lack of any regulatory standards. These 2023 deliverables were proposed in the USACE fact sheet \u201c<a href=\"https:\/\/doer.el.erdc.dren.mil\/factSheets\/RISK\/nov2022\/23-08_FactSheet_McQueen_GuidanceforCommunicatingRisksofMicroplasticsandNanoplasticsinDredgedSediments.pdf\">Guidance for Communicating Risks of Microplastics and Nanoplastics in Dredged Sediments<\/a>\u201d and will include:<\/p>\n<ol>\n<li>A literature review of MP occurrence and abundance relevant to USACE dredging operations<\/li>\n<li>A database to store MP information on fate, effects, and risks<\/li>\n<li>A MP decision support framework to help dredging operation managers communicate with stakeholders<\/li>\n<\/ol>\n<p>With the lack of any state or federal regulatory standards regarding surface water or sediment, these resources will fill a much-needed gap by providing direction to best mitigate MP risk.<\/p>\n                            <\/div>\n                        <\/div>\n                                                                    <\/div>\n\n            <\/div>\n<\/section>\n<!-- End Block: acf\/wysiwyg -->\n\n<!-- Start Block: acf\/wysiwyg -->\n\n<section class=\"wysiwyg section-padding bg-white-fog\">\n    <div class=\"container-fluid\">\n                    <div class=\"wysiwyg__wrapper\">\n        \n        <div class=\"row\">\n                        <div class=\"col-lg-12\">\n                                                                                \n                                                <\/div>\n\n                            <div class=\"col-lg-12 js-animated-content animated-content\">\n                    <h2 style=\"text-align: center;\">What Can be Done Upstream?<\/h2>\n<p style=\"text-align: center;\">The best way to reduce the spread of MP in the environment is to start at the source: think of the old adage of turning off the faucet before cleaning up the spill. The furthest upstream solutions begin with actions such as substituting plastic materials with more sustainable alternatives and reducing the consumption of plastics through education and awareness. Slightly further downstream, solutions can include actions such as improving MP removal rates from wastewater discharges or installing structures in waterways to remove macroplastic debris.\u00a0 Further downstream once MP are released into the environment, they are much more difficult to control.\u00a0 However, large amounts of research and federal funding are being invested into mitigation and remediation strategies to reduce MP concentrations in water, soil, sediment and air.<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.trccompanies.com\/contact-us\/\"><img decoding=\"async\" class=\" wp-image-12002 aligncenter\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/Microplastic-Remediation-2.jpg\" alt=\"\" width=\"735\" height=\"368\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/Microplastic-Remediation-2.jpg 1280w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/Microplastic-Remediation-2-300x150.jpg 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/Microplastic-Remediation-2-1024x512.jpg 1024w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/Microplastic-Remediation-2-768x384.jpg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/Microplastic-Remediation-2-1200x600.jpg 1200w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/Microplastic-Remediation-2-1000x500.jpg 1000w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/Microplastic-Remediation-2-700x350.jpg 700w\" sizes=\"(max-width: 735px) 100vw, 735px\" \/><\/a><\/p>\n                <\/div>\n                                <\/div>\n\n                    <\/div>\n            <\/div>\n<\/section>\n<!-- End Block: acf\/wysiwyg -->\n\n<!-- Start Block: acf\/innerpage-half-text-half-image -->\n\n<section class=\"half-and-half flex-row section-padding image-block-left bg-white text-column-one image-size-cover\">\n    <div class=\"half-and-half-image\">\n        <div class=\"half-and-half-image__wrap\">\n                                                <img decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/ea6524ae-microplastics-ship-1024x682.jpg\" class=\"object-fit\" alt=\"ea6524ae-microplastics-ship\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/ea6524ae-microplastics-ship-1024x682.jpg 1024w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/ea6524ae-microplastics-ship-300x200.jpg 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/ea6524ae-microplastics-ship-768x511.jpg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/ea6524ae-microplastics-ship-1536x1023.jpg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/ea6524ae-microplastics-ship-901x600.jpg 901w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/ea6524ae-microplastics-ship.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>                                    <\/div>\n    <\/div>\n    \n    <div class=\"half-and-half-text\">\n        <div class=\"half-and-half-text__wrapper js-animated-content animated-content\">\n                                        <h2>TRC is Engaged in Finding Solutions<\/h2>\n<p>TRC is actively tracking and researching engineering technologies to overcome the obstacles posed by MP management during dredging, dewatering and treatment of impacted sediments.\u00a0 Watch for an upcoming blog that will provide a summary of both established and exciting emerging remedial solutions to reduce and even clean up MP from our waterways and sediment. We are prepared to assist you with your microplastics-related questions. For more information, please contact our experts below.<\/p>\n                    <\/div>\n    <\/div>\n<\/section>\n<!-- End Block: acf\/innerpage-half-text-half-image -->\n\n<!-- Start Block: acf\/innerpage-cta-bar -->\n<section class=\"global-cta innerpage-cta cta-light-gradient\">\n    <div class=\"container-fluid\">\n        <div class=\"global-cta-wrapper flush-bottom \">\n                            <div class=\"row\">\n                    <div class=\"col-sm-12\">\n                        <h2>Embrassez le changement<\/h2>\n                    <\/div>\n                    <div class=\"col-sm-12\">\n                        <div class=\"global-cta-content\">\n                            <p>Collaborez avec les praticiens test\u00e9s de TRC<\/p>\n                            <p><a href=\"https:\/\/www.trccompanies.com\/contact-us\/\" title=\"Contact Us\" class=\"btn btn-primary\" >Contact Us<\/a><\/p>\n                        <\/div>\n                    <\/div>\n                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                                       <p>Caltrans District 12\u2019s $62 million project to improve SR-91 in Orange County required an expedited delivery of Project Approval\/Environmental Document &hellip;<\/p>\n                                        <\/div>\n                                    <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                                                <div class=\"projects-featured-slider-item fx-slide\">\n                            <div class=\"project-list-card-item\">\n                                <div class=\"project-list-card\">\n                                    <img decoding=\"async\" width=\"1920\" height=\"2560\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min.jpeg\" class=\"object-fit project-list-card-image\" alt=\"I-405-Express-Lanes-DB-1-scaled-min\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min.jpeg 1920w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-225x300.jpeg 225w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-768x1024.jpeg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-1152x1536.jpeg 1152w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-1536x2048.jpeg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-450x600.jpeg 450w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-375x500.jpeg 375w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/>                                    <div class=\"project-list-card__details\">\n                                                                                <ul class=\"hidden-xs-down\">\n                                        <li><a href=\"https:\/\/www.trccompanies.com\/projects-category\/civil-engineering\/\" class=\"image-card__category\">Civil Engineering<\/a><\/li><li><a href=\"https:\/\/www.trccompanies.com\/projects-category\/transportation\/\" class=\"image-card__category\">Transportation<\/a><\/li>                                        <\/ul>\n                                                                                <a href=\"https:\/\/www.trccompanies.com\/projects\/caltrans-district-7-pavement-rehab-project\/\" class=\"project-list-card-title\">Caltrans District 7 Pavement Rehab Project<\/a>\n                                        <a href=\"https:\/\/www.trccompanies.com\/projects\/caltrans-district-7-pavement-rehab-project\/\" class=\"project-card-redirect-btn\"><i class=\"icon-link\"><\/i><\/a>\n                                        <div class=\"project-list-card__content hidden-md-down\">\n                                            <p>Caltrans District 7 undertook a $7 million project to rehabilitate pavement on SR-33 and SR-150 in the cities of Ojai, &hellip;<\/p>\n                                        <\/div>\n                                    <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                                                <div class=\"projects-featured-slider-item fx-slide\">\n                            <div class=\"project-list-card-item\">\n                                <div class=\"project-list-card\">\n                                    <img decoding=\"async\" width=\"2560\" height=\"1707\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min.jpg\" class=\"object-fit project-list-card-image\" alt=\"I-10-Alabama-scaled-min\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min.jpg 2560w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-300x200.jpg 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-1024x683.jpg 1024w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-768x512.jpg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-1536x1024.jpg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-2048x1366.jpg 2048w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-900x600.jpg 900w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-750x500.jpg 750w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-700x467.jpg 700w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/>                                    <div class=\"project-list-card__details\">\n                                                                                <ul class=\"hidden-xs-down\">\n                                        <li><a href=\"https:\/\/www.trccompanies.com\/projects-category\/civil-engineering\/\" class=\"image-card__category\">Civil Engineering<\/a><\/li><li><a href=\"https:\/\/www.trccompanies.com\/projects-category\/public-transportation\/\" class=\"image-card__category\">Public Transportation<\/a><\/li><li><a href=\"https:\/\/www.trccompanies.com\/projects-category\/transportation\/\" class=\"image-card__category\">Transportation<\/a><\/li>                                        <\/ul>\n                                                                                <a href=\"https:\/\/www.trccompanies.com\/projects\/i-10-alabama-street-interchange-improvements\/\" class=\"project-list-card-title\">I-10 Alabama Street Interchange Improvements<\/a>\n                                        <a href=\"https:\/\/www.trccompanies.com\/projects\/i-10-alabama-street-interchange-improvements\/\" class=\"project-card-redirect-btn\"><i class=\"icon-link\"><\/i><\/a>\n                                        <div class=\"project-list-card__content hidden-md-down\">\n                                            <p>When the San Bernardino County Transportation Authority (SBCTA) undertook an $11 million project to enhance traffic operation and alleviate traffic &hellip;<\/p>\n                                        <\/div>\n                                    <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                                                <div class=\"projects-featured-slider-item fx-slide\">\n                            <div class=\"project-list-card-item\">\n                                <div class=\"project-list-card\">\n                                    <img decoding=\"async\" width=\"2560\" height=\"1707\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min.jpg\" class=\"object-fit project-list-card-image\" alt=\"I-10-Express-Lanes-Contract-1-scaled-min\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min.jpg 2560w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-300x200.jpg 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-1024x683.jpg 1024w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-768x512.jpg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-1536x1024.jpg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-2048x1366.jpg 2048w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-900x600.jpg 900w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-750x500.jpg 750w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-700x467.jpg 700w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/>                                    <div class=\"project-list-card__details\">\n                                                                                <ul class=\"hidden-xs-down\">\n                                        <li><a href=\"https:\/\/www.trccompanies.com\/projects-category\/civil-engineering\/\" class=\"image-card__category\">Civil Engineering<\/a><\/li><li><a href=\"https:\/\/www.trccompanies.com\/projects-category\/transportation\/\" class=\"image-card__category\">Transportation<\/a><\/li>                                        <\/ul>\n                                                                                <a href=\"https:\/\/www.trccompanies.com\/projects\/i-10-express-lanes-contract-1-design-build\/\" class=\"project-list-card-title\">I-10 Express Lanes Contract 1 Design-Build<\/a>\n                                        <a href=\"https:\/\/www.trccompanies.com\/projects\/i-10-express-lanes-contract-1-design-build\/\" class=\"project-card-redirect-btn\"><i class=\"icon-link\"><\/i><\/a>\n                                        <div class=\"project-list-card__content hidden-md-down\">\n                                            <p>When the San Bernardino County Transportation Authority (SBCTA) undertook a $500 million project to construct two express lanes in each &hellip;<\/p>\n                                        <\/div>\n                                    <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                                            <\/div>\n                <\/div>\n                <div class=\"col-xxs-12 col-lg-5\">\n                    <div class=\"js-projects-featured-list-slider fx-slider\">\n                                                <div class=\"projects-featured-slider-list-item fx-slide\">\n                            <div class=\"project-list-card-item\">\n                                <div class=\"project-list-card\">\n                                    <img decoding=\"async\" width=\"2000\" height=\"1500\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/956554ad-ws-trail-ext-construction-min.jpeg\" class=\"object-fit project-list-card-image\" alt=\"956554ad-ws-trail-ext-construction-min\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/956554ad-ws-trail-ext-construction-min.jpeg 2000w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/956554ad-ws-trail-ext-construction-min-300x225.jpeg 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/956554ad-ws-trail-ext-construction-min-1024x768.jpeg 1024w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/956554ad-ws-trail-ext-construction-min-768x576.jpeg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/956554ad-ws-trail-ext-construction-min-1536x1152.jpeg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/956554ad-ws-trail-ext-construction-min-800x600.jpeg 800w\" sizes=\"(max-width: 2000px) 100vw, 2000px\" \/>                                    <div class=\"project-list-card__details\">\n                                                                                <ul class=\"hidden-xs-down\">\n                                        <li class=\"construction-et-gestion-de-la-construction\"><a href=\"https:\/\/www.trccompanies.com\/fr\/projects-category\/construction-et-gestion-de-la-construction\/\" class=\"image-card__category\">Construction et gestion de la construction<\/a><\/li><li class=\"eau\"><a href=\"https:\/\/www.trccompanies.com\/fr\/projects-category\/eau\/\" class=\"image-card__category\">Eau<\/a><\/li><li class=\"genie-civil\"><a href=\"https:\/\/www.trccompanies.com\/fr\/projects-category\/genie-civil\/\" class=\"image-card__category\">G\u00e9nie civil<\/a><\/li>                                        <\/ul>\n                                                                                <a href=\"https:\/\/www.trccompanies.com\/fr\/projects\/prolongement-du-sentier-walnut-springs\/\" class=\"project-list-card-title\">Prolongement du sentier Walnut Springs<\/a>\n                                        <a href=\"https:\/\/www.trccompanies.com\/fr\/projects\/prolongement-du-sentier-walnut-springs\/\" class=\"project-card-redirect-btn\"><i class=\"icon-link\"><\/i><\/a>\n                                        <div class=\"project-list-card__content hidden-md-down\">\n                                            <p>TRC a v\u00e9rifi\u00e9 les am\u00e9liorations propos\u00e9es qui n\u2019entra\u00eeneraient pas d\u2019\u00e9l\u00e9vation de la surface de l\u2019eau sur 100 ans et a &hellip;<\/p>\n                                        <\/div>\n                                    <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                                                <div class=\"projects-featured-slider-list-item fx-slide\">\n                            <div class=\"project-list-card-item\">\n                                <div class=\"project-list-card\">\n                                    <img decoding=\"async\" width=\"2560\" height=\"1925\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/12A1857-SR-91-Multi-Asset-scaled-min.jpg\" class=\"object-fit project-list-card-image\" alt=\"12A1857-SR-91-Multi-Asset-scaled-min\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/12A1857-SR-91-Multi-Asset-scaled-min.jpg 2560w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/12A1857-SR-91-Multi-Asset-scaled-min-300x226.jpg 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/12A1857-SR-91-Multi-Asset-scaled-min-1024x770.jpg 1024w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/12A1857-SR-91-Multi-Asset-scaled-min-768x578.jpg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/12A1857-SR-91-Multi-Asset-scaled-min-1536x1155.jpg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/12A1857-SR-91-Multi-Asset-scaled-min-2048x1540.jpg 2048w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/12A1857-SR-91-Multi-Asset-scaled-min-798x600.jpg 798w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/12A1857-SR-91-Multi-Asset-scaled-min-665x500.jpg 665w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/>                                    <div class=\"project-list-card__details\">\n                                                                                <ul class=\"hidden-xs-down\">\n                                        <li class=\"civil-engineering\"><a href=\"https:\/\/www.trccompanies.com\/projects-category\/civil-engineering\/\" class=\"image-card__category\">Civil Engineering<\/a><\/li><li class=\"transportation\"><a href=\"https:\/\/www.trccompanies.com\/projects-category\/transportation\/\" class=\"image-card__category\">Transportation<\/a><\/li>                                        <\/ul>\n                                                                                <a href=\"https:\/\/www.trccompanies.com\/projects\/caltrans-district-12-roadway-design-project-development-and-construction\/\" class=\"project-list-card-title\">Caltrans District 12 Roadway Design, Project Development and Construction<\/a>\n                                        <a href=\"https:\/\/www.trccompanies.com\/projects\/caltrans-district-12-roadway-design-project-development-and-construction\/\" class=\"project-card-redirect-btn\"><i class=\"icon-link\"><\/i><\/a>\n                                        <div class=\"project-list-card__content hidden-md-down\">\n                                            <p>Caltrans District 12\u2019s $62 million project to improve SR-91 in Orange County required an expedited delivery of Project Approval\/Environmental Document &hellip;<\/p>\n                                        <\/div>\n                                    <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                                                <div class=\"projects-featured-slider-list-item fx-slide\">\n                            <div class=\"project-list-card-item\">\n                                <div class=\"project-list-card\">\n                                    <img decoding=\"async\" width=\"1920\" height=\"2560\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min.jpeg\" class=\"object-fit project-list-card-image\" alt=\"I-405-Express-Lanes-DB-1-scaled-min\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min.jpeg 1920w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-225x300.jpeg 225w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-768x1024.jpeg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-1152x1536.jpeg 1152w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-1536x2048.jpeg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-450x600.jpeg 450w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-405-Express-Lanes-DB-1-scaled-min-375x500.jpeg 375w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/>                                    <div class=\"project-list-card__details\">\n                                                                                <ul class=\"hidden-xs-down\">\n                                        <li class=\"civil-engineering\"><a href=\"https:\/\/www.trccompanies.com\/projects-category\/civil-engineering\/\" class=\"image-card__category\">Civil Engineering<\/a><\/li><li class=\"transportation\"><a href=\"https:\/\/www.trccompanies.com\/projects-category\/transportation\/\" class=\"image-card__category\">Transportation<\/a><\/li>                                        <\/ul>\n                                                                                <a href=\"https:\/\/www.trccompanies.com\/projects\/caltrans-district-7-pavement-rehab-project\/\" class=\"project-list-card-title\">Caltrans District 7 Pavement Rehab Project<\/a>\n                                        <a href=\"https:\/\/www.trccompanies.com\/projects\/caltrans-district-7-pavement-rehab-project\/\" class=\"project-card-redirect-btn\"><i class=\"icon-link\"><\/i><\/a>\n                                        <div class=\"project-list-card__content hidden-md-down\">\n                                            <p>Caltrans District 7 undertook a $7 million project to rehabilitate pavement on SR-33 and SR-150 in the cities of Ojai, &hellip;<\/p>\n                                        <\/div>\n                                    <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                                                <div class=\"projects-featured-slider-list-item fx-slide\">\n                            <div class=\"project-list-card-item\">\n                                <div class=\"project-list-card\">\n                                    <img decoding=\"async\" width=\"2560\" height=\"1707\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min.jpg\" class=\"object-fit project-list-card-image\" alt=\"I-10-Alabama-scaled-min\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min.jpg 2560w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-300x200.jpg 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-1024x683.jpg 1024w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-768x512.jpg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-1536x1024.jpg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-2048x1366.jpg 2048w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-900x600.jpg 900w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-750x500.jpg 750w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Alabama-scaled-min-700x467.jpg 700w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/>                                    <div class=\"project-list-card__details\">\n                                                                                <ul class=\"hidden-xs-down\">\n                                        <li class=\"civil-engineering\"><a href=\"https:\/\/www.trccompanies.com\/projects-category\/civil-engineering\/\" class=\"image-card__category\">Civil Engineering<\/a><\/li><li class=\"public-transportation\"><a href=\"https:\/\/www.trccompanies.com\/projects-category\/public-transportation\/\" class=\"image-card__category\">Public Transportation<\/a><\/li><li class=\"transportation\"><a href=\"https:\/\/www.trccompanies.com\/projects-category\/transportation\/\" class=\"image-card__category\">Transportation<\/a><\/li>                                        <\/ul>\n                                                                                <a href=\"https:\/\/www.trccompanies.com\/projects\/i-10-alabama-street-interchange-improvements\/\" class=\"project-list-card-title\">I-10 Alabama Street Interchange Improvements<\/a>\n                                        <a href=\"https:\/\/www.trccompanies.com\/projects\/i-10-alabama-street-interchange-improvements\/\" class=\"project-card-redirect-btn\"><i class=\"icon-link\"><\/i><\/a>\n                                        <div class=\"project-list-card__content hidden-md-down\">\n                                            <p>When the San Bernardino County Transportation Authority (SBCTA) undertook an $11 million project to enhance traffic operation and alleviate traffic &hellip;<\/p>\n                                        <\/div>\n                                    <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                                                <div class=\"projects-featured-slider-list-item fx-slide\">\n                            <div class=\"project-list-card-item\">\n                                <div class=\"project-list-card\">\n                                    <img decoding=\"async\" width=\"2560\" height=\"1707\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min.jpg\" class=\"object-fit project-list-card-image\" alt=\"I-10-Express-Lanes-Contract-1-scaled-min\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min.jpg 2560w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-300x200.jpg 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-1024x683.jpg 1024w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-768x512.jpg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-1536x1024.jpg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-2048x1366.jpg 2048w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-900x600.jpg 900w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-750x500.jpg 750w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/I-10-Express-Lanes-Contract-1-scaled-min-700x467.jpg 700w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/>                                    <div class=\"project-list-card__details\">\n                                                                                <ul class=\"hidden-xs-down\">\n                                        <li class=\"civil-engineering\"><a href=\"https:\/\/www.trccompanies.com\/projects-category\/civil-engineering\/\" class=\"image-card__category\">Civil Engineering<\/a><\/li><li class=\"transportation\"><a href=\"https:\/\/www.trccompanies.com\/projects-category\/transportation\/\" class=\"image-card__category\">Transportation<\/a><\/li>                                        <\/ul>\n                                                                                <a href=\"https:\/\/www.trccompanies.com\/projects\/i-10-express-lanes-contract-1-design-build\/\" class=\"project-list-card-title\">I-10 Express Lanes Contract 1 Design-Build<\/a>\n                                        <a href=\"https:\/\/www.trccompanies.com\/projects\/i-10-express-lanes-contract-1-design-build\/\" class=\"project-card-redirect-btn\"><i class=\"icon-link\"><\/i><\/a>\n                                        <div class=\"project-list-card__content hidden-md-down\">\n                                            <p>When the San Bernardino County Transportation Authority (SBCTA) undertook a $500 million project to construct two express lanes in each &hellip;<\/p>\n                                        <\/div>\n                                    <\/div>\n                                <\/div>\n                            <\/div>\n                        <\/div>\n                                            <\/div>\n    \n                <\/div>\n\n            <\/div>\n        <\/div>\n\n        <div class=\"projects-featured__btn hidden-lg\">\n            <a href=\"https:\/\/www.trccompanies.com\/projects\/\" title=\"View Our Project Capabilities\" class=\"btn btn-tertiary hidden-sm-up\" >View Our Project Capabilities<\/a>            <a href=\"https:\/\/www.trccompanies.com\/projects\/\" title=\"View Our Project Capabilities\" class=\"btn btn-tertiary 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Microplastics (MP) are very small pieces of plastic that come from a variety of sources. <\/p>\n","protected":false},"featured_media":11994,"template":"","tags":[164,218,610,268,277,348],"news-and-insights-category":[363],"services-category":[1001],"custom_category":[1012],"class_list":["post-1386","news-and-insights","type-news-and-insights","status-publish","has-post-thumbnail","hentry","tag-commercial","tag-government","tag-industrial-and-manufacturing","tag-pfas-and-emerging-contaminants","tag-ports-and-harbors","tag-water","news-and-insights-category-insights","services-category-environmental-assessment-permitting-compliance","custom_category-water"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Understanding Microplastics in Sediments - TRC Companies<\/title>\n<meta name=\"description\" content=\"The accumulation of plastic pollution in the environment has rapidly increased in recent decades. 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