[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-174296-en":3,"doc-seo-174296-105":31,"detail-sidebar-cat-1-en-105":91},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":11,"category_id":12,"category_name":13,"doc_title":14,"doc_description":15,"doc_content":16,"file_id":17,"file_url":18,"file_type":19,"file_size":20,"view_count":21,"is_deleted":4,"is_public":11,"is_downloadable":11,"audit_status":11,"page_count":22,"language":23,"language_code":24,"site_id":25,"html_lang":24,"table_of_contents":26,"faqs":27,"seo_title":28,"seo_description":15,"update_tm":29,"read_time":30},174296,4398048949847,"Eliana","https://ap-avatar.wpscdn.com/avatar/400002536579ef2da7f?_k=1778318612642679267",1,17,"Forms","Standard Operating Procedure - for the Analysis of Settleable Residue - Method: SM 2540 F-2020","Standard Operating Procedure defines how to analyze settleable residue using Method SM 2540 F-2020. It specifies method applicability per regulatory definition, required sample volume (minimum 1 liter), container and storage conditions, holding time, and a controlled settling sequence in an Imhoff cone with defined stirring/spin steps. The procedure outlines apparatus, safety and waste handling expectations, documentation requirements for times and calculated residue volume in mL/L, and proficiency testing rules for blind PT samples within each PT calendar year.","Name of Facility\nStandard Operating Procedure\nfor the Analysis of\nSettleable Residue\nMethod: SM 2540 F-2020\nEffective Date:\nSupervisor Signature: ___________________  Date:__________\nSupervisor Name (print):________________________________\nTable of Contents\n1.0 – Summary of Method\tPg.\tx\n2.0 – Definitions \tPg. \tx\n3.0 – Safety and Waste Handling\tPg. \tx\n4.0 – Apparatus and Equipment\tPg.\tx\n5.0 – Interferences\tPg.\tx\n6.0 – Sample Collection, Preservation and Holding Time\tPg.\tx\n7.0 – Procedure \tPg.\tx\n8.0 – Documentation \tPg. \tx\n9.0 – Proficiency Testing Procedures\tPg. \tx\n10.0 – Reporting\tPg.\tx\n11.0 – Employee Training\tPg. \tx\n12.0 – References \tPg. \tx\n13.0 – Revision History\tPg.\tx\n\u000f\tBlue text is replaceable instructional language to be customized for your facility.\nSummary of Method\nSettleable Residue is considered a method-defined parameter per the definition in the Code of Federal Regulations, Part 136.6, Section (a) (5). This means that the method may not be modified to reduce the sample volume per Section (b) (3).\nOne liter of water is allowed to settle for 1 hour in an Imhoff Cone and the amount of residue which settles to the bottom of the cone is visually determined.\nState what type of samples are analyzed, e.g., wastewater effluent, ground water monitoring well, etc.\nState what the smallest gradation of the cone is, which will be the reporting limit\nDefinitions\nmL/L: Units for the measurement of settleable residue.\nNC WW/GW LCB: North Carolina Wastewater Groundwater Laboratory Certification Branch\nAdd any acronyms or terms used by your facility that may need to be defined\nSafety and Waste Handling\nItems that would be included in this section are things such as:\nPrecautionary measures (list here and at the critical steps in the procedure)\nPersonal protective equipment (e.g., gloves, eye protection, lab coat, work in a hood, etc.)\nApparatus and Equipment\nImhoff Cone\nGraduated cylinder\nGlass rod (remove if not using to stir)\nTimer (when used)\nInterferences\nN/A\nSample Collection, Preservation and Holding Time\nA minimum of 1 liter is collected.\nState what type of container samples are collected in. Samples must be collected in glass, fluoropolymer or polyethylene containers.\nWhen sample analysis is not begun within 15 minutes, the sample must be transported and stored above freezing and ≤ 6°C.\nThe holding time is 48 hours.\nProcedure\nEnsure the Imhoff Cone is dry prior to analysis. Mix the sample well and pour exactly 1 liter into the Imhoff Cone.\nSet timer and allow the sample to settle for 45 minutes.\nAt 45 minutes, gently stir the sides of the cone with a glass rod (or) gently spin the cone (remove the procedure that is not done).\nSet timer and allow the sample to settle for an additional 15 minutes. Do not allow sample to settle for more than 1 hour total.\nDocument the observed volume of residue in the bottom of the cone in mL. If the settled matter contains pockets of liquid between large settled particles, estimate volume of pockets of liquid and subtract from the volume of settled solids. NOTE: Where a separation of settleable and floating material occurs, do not estimate the floating material as settleable matter.\nDocumentation\nAll documentation errors shall be corrected by drawing a single line through the error so that the original entry remains legible. Entries shall not be obliterated by erasures or markings. Wite-Out®, correction tape, or similar products designed to obliterate documentation are not to be used; instead the correction shall be written adjacent to the error. The correction shall be initialed by the responsible individual and the date of change documented. All manual data and log entries shall be written in indelible ink.\nThe following must be documented in indelible ink whenever sample analysis is performed.\nDate and time of sample collection\nDate and time of sample analysis (must document start and end times) to verify the 48-hour holding and the 1-hour settling times are met\n45-minute stir time (use of ","cbCaim0SP7CVBub3","https://ap.wps.com/l/cbCaim0SP7CVBub3","docx",42652,2,8,"English","en",105,"# Table of Contents\n## 1.0 – Summary of Method\n## 2.0 – Definitions\n## 3.0 – Safety and Waste Handling\n## 4.0 – Apparatus and Equipment\n## 5.0 – Interferences\n## 6.0 – Sample Collection, Preservation and Holding Time\n## 7.0 – Procedure\n## 8.0 – Documentation\n## 9.0 – Proficiency Testing Procedures\n## 10.0 – Reporting\n## 11.0 – Employee Training\n## 12.0 – References\n## 13.0 – Revision History","[{\"question\":\"What method acceptance constraints apply to modifying the settleable residue analysis?\",\"answer\":\"Settleable Residue is treated as a method-defined parameter; the method may not be modified to reduce sample volume under the stated regulatory section (b)(3).\"},{\"question\":\"What are the required sample volume, settling time, and holding time?\",\"answer\":\"A minimum of 1 liter is collected. Samples settle for 45 minutes, then an additional 15 minutes (total settling time must not exceed 1 hour). The holding time is 48 hours, with analysis time windows documented to verify holding and settling requirements.\"},{\"question\":\"How must the results and documentation be recorded during sample analysis?\",\"answer\":\"Observed residue volume is documented in mL and reported in units of mL/L. Documentation must be completed in indelible ink with required dates/times, stirring checkbox (if used), facility name/permit or sample site, analyst identifiers, final reported value, method reference, and any applicable data qualifiers.\"}]","Standard Operating Procedure - for the Analysis of Settleable Residue - Method: SM 2540 F-2020 | DOCX",1788311621,3,{"code":4,"msg":32,"data":33},"ok",{"site_id":25,"language":24,"slug":34,"title":14,"keywords":35,"description":15,"schema_data":36,"social_meta":86,"head_meta":88,"extra_data":90,"updated_unix":29},"standard-operating-procedure-for-the-analysis-of-settleable-residue-method-sm-2540-f-2020","",{"@graph":37,"@context":85},[38,53,68],{"@type":39,"itemListElement":40},"BreadcrumbList",[41,45,48,50],{"item":42,"name":43,"@type":44,"position":11},"https://docshare.wps.com","Home","ListItem",{"item":46,"name":47,"@type":44,"position":21},"https://docshare.wps.com/template/","Template",{"item":49,"name":13,"@type":44,"position":30},"https://docshare.wps.com/template/forms/",{"item":51,"name":14,"@type":44,"position":52},"https://docshare.wps.com/template/standard-operating-procedure-for-the-analysis-of-settleable-residue-method-sm-2540-f-2020/174296/",4,{"url":51,"name":14,"@type":54,"author":55,"headline":14,"publisher":57,"fileFormat":60,"inLanguage":24,"description":15,"dateModified":61,"datePublished":62,"encodingFormat":60,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":42,"name":58,"@type":59},"DocShare","Organization","application/vnd.openxmlformats-officedocument.wordprocessingml.document","2026-09-03","2026-09-02",true,{"@type":65,"interactionType":66,"userInteractionCount":21},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71,77,81],{"name":72,"@type":73,"acceptedAnswer":74},"What method acceptance constraints apply to modifying the settleable residue analysis?","Question",{"text":75,"@type":76},"Settleable Residue is treated as a method-defined parameter; the method may not be modified to reduce sample volume under the stated regulatory section (b)(3).","Answer",{"name":78,"@type":73,"acceptedAnswer":79},"What are the required sample volume, settling time, and holding time?",{"text":80,"@type":76},"A minimum of 1 liter is collected. Samples settle for 45 minutes, then an additional 15 minutes (total settling time must not exceed 1 hour). The holding time is 48 hours, with analysis time windows documented to verify holding and settling requirements.",{"name":82,"@type":73,"acceptedAnswer":83},"How must the results and documentation be recorded during sample analysis?",{"text":84,"@type":76},"Observed residue volume is documented in mL and reported in units of mL/L. Documentation must be completed in indelible ink with required dates/times, stirring checkbox (if used), facility name/permit or sample site, analyst identifiers, final reported value, method reference, and any applicable data qualifiers.","https://schema.org",{"og:url":51,"og:type":87,"og:title":14,"og:site_name":58,"og:description":15},"article",{"robots":89,"canonical":51},"index,follow",{"doc_id":7,"site_id":25},{"code":4,"msg":5,"data":92},[93,98,103,108,113,118,121,126,131],{"id":94,"doc_module":11,"doc_module_name":47,"category_name":95,"show_sort_weight":96,"slug":97},11,"Presentations",90,"presentations",{"id":99,"doc_module":11,"doc_module_name":47,"category_name":100,"show_sort_weight":101,"slug":102},12,"Resumes",80,"resumes",{"id":104,"doc_module":11,"doc_module_name":47,"category_name":105,"show_sort_weight":106,"slug":107},14,"Invoices",70,"invoices",{"id":109,"doc_module":11,"doc_module_name":47,"category_name":110,"show_sort_weight":111,"slug":112},15,"Posters",60,"posters",{"id":114,"doc_module":11,"doc_module_name":47,"category_name":115,"show_sort_weight":116,"slug":117},16,"Social Media",50,"social-media",{"id":12,"doc_module":11,"doc_module_name":47,"category_name":13,"show_sort_weight":119,"slug":120},40,"forms",{"id":122,"doc_module":11,"doc_module_name":47,"category_name":123,"show_sort_weight":124,"slug":125},18,"Letters",30,"letters",{"id":127,"doc_module":11,"doc_module_name":47,"category_name":128,"show_sort_weight":129,"slug":130},21,"Paper Templates",5,"papers-templates",{"id":132,"doc_module":11,"doc_module_name":47,"category_name":133,"show_sort_weight":4,"slug":134},158,"General","general-158"]