{"closest_prior_art":[{"name":"EPA Region 4 Wastewater Sampling procedure","overlap":"Covers wastewater collection for field screening or laboratory analysis; requires representative sample volume, mixing and transfer into respective containers, immediate preservation where required, custody seals, chain-of-custody records, equipment blanks, and offering the permittee a split sample during routine inspections.","remaining_difference":"It does not expressly designate one fraction as a disposable, screening-only store, require a one-way manifold, or mandate retained-split reanalysis whenever field and laboratory results disagree.","source_ids":["SRC1"]},{"name":"EPA NPDES Compliance Inspection Manual sampling architecture","overlap":"Combines field measurements, immediate analysis or preservation of unstable pollutants, analyte-specific containers and holding times, sufficient volume for split or repeat analyses, facility-accessible splits, tamper-evident custody, laboratory quality control, and preservation of evidence for court.","remaining_difference":"The elements are presented as established sampling and evidence controls rather than as one named dual-store protocol with differential expiration and an automatic discrepancy-triggered reanalysis rule.","source_ids":["SRC2","SRC3"]},{"name":"USGS cone-splitter field-processing protocol","overlap":"A homogenized collection is physically divided into representative subsamples for immediate field measurements and separately filtered, untreated, acidified, or chilled laboratory analyses; splitter accuracy, contamination controls, rapid processing, and extra subsamples are addressed.","remaining_difference":"It is a stream-monitoring protocol, not an enforcement-evidence protocol, and does not assign screening-only authority, preserve a legal challenge split, or specify adjudicative reconciliation.","source_ids":["SRC4"]}],"contrastive_claim_falsifier":"The remaining claim is falsified if a directly applicable approved protocol already requires the same one-way, screening-only/preserved-evidence partition and discrepancy-triggered retained reanalysis, or if a blinded analyte-matrix bench comparison shows no improvement in preserved recovery, precision, remaining challenge volume, or valid discrepancy resolution relative to the approved baseline, including if the manifold introduces material split bias or contamination.","contrastive_claim_remaining":"For one approved analyte-matrix pair, adding an explicitly screening-only, expiring working aliquot and a protected retained evidentiary aliquot—coupled by a validated one-way split, timed preservation, and mandatory control-based reanalysis after disagreement—will preserve confirmatory accuracy and challenge capacity better than the current approved sequence. The novelty-relevant remainder is this explicit authority-and-reconciliation coupling, not sample splitting, field measurement, preservation, custody, or repeat-analysis capacity individually.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","gates":{"adequate_source_search":{"rationale":"Four lanes covered direct terminology, historical terminology, governing preservation requirements, established inspection practice, and component combinations. Four opened direct sources from EPA, GovInfo, and USGS were retained. The search was adequate for a coarse screen, although not for novelty or patent conclusions.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PASS"},"bounded_next_test":{"rationale":"A blinded comparison using synthetic nonhazardous standards for one agency-selected analyte-matrix pair is bounded and can measure homogeneity, recovery, precision, blank contamination, holding-time compliance, disagreement resolution, retained volume, and handling hazards before any field or enforcement use.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PASS"},"distinct_testable_claim":{"rationale":"Although the broad dual-aliquot architecture substantially collides with established guidance, a narrower testable claim remains around the combined one-way routing, explicit expiration and screening-only status, protected challenge aliquot, and mandatory discrepancy-triggered reanalysis.","source_ids":["SRC1","SRC2","SRC4"],"status":"PASS"},"no_obvious_safety_or_authority_stop":{"rationale":"No obvious stop prevents the proposed synthetic bench comparison. EPA guidance already anticipates preservatives, custody controls, documented deviations, safety plans, and hazardous-material requirements. Method approval, preservative compatibility, PPE, and nonauthoritative treatment of field readings remain mandatory prerequisites to any field use.","source_ids":["SRC1","SRC2","SRC3"],"status":"PASS"},"supported_problem":{"rationale":"EPA states that wastewater commonly contains unstable pollutants requiring immediate preservation or analysis and identifies improper preservation, mixing, splitting, and excessive holding time as common errors. The regulation prescribes analyte-specific containers, preservation, and maximum holding times, while USGS guidance documents rapid subdivision and distinct processing for field and laboratory determinations.","source_ids":["SRC2","SRC3","SRC4"],"status":"PASS"}},"prior_art_disposition":"SUBSTANTIAL_COLLISION","problem_evidence":{"finding":"The fast-versus-durable sampling problem is visible: some wastewater parameters require analysis within minutes, other fractions require prompt chemical or physical preservation, and poor holding, mixing, splitting, contamination control, or custody can invalidate later analysis. Existing official procedures already address much of this by splitting representative samples into field and laboratory fractions, preserving analyte-specific containers, retaining volume for splits or repeat analyses, and maintaining evidentiary custody.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"SUPPORTED"},"research_id":"eoa_inverse_innovation_exp13_light_screen_20260806","schema_version":1,"screen_id":"E13P001","screen_survival":false,"search_lanes":{"component_combination":{"no_result_note":null,"queries":["water quality sample splitter field measurement preserved aliquot laboratory split sample protocol","site:usgs.gov water sample field measurements aliquots preserved laboratory analysis splitter","wastewater sampling immediate analysis preserved sample split sample duplicate retained aliquot"],"source_ids":["SRC1","SRC2","SRC4"]},"direct_problem_and_intervention":{"no_result_note":null,"queries":["EPA wastewater sampling field measurement split sample preserved aliquot laboratory confirmation chain of custody","site:epa.gov wastewater sampling field screening laboratory analysis aliquot preservation"],"source_ids":["SRC1","SRC2"]},"products_practices_and_standards":{"no_result_note":null,"queries":["EPA NPDES compliance inspection manual sample preservation field measurements laboratory samples split samples","40 CFR 136.3 Table II sample preservation holding times wastewater immediate analyze"],"source_ids":["SRC1","SRC2","SRC3"]},"synonyms_and_historical_terms":{"no_result_note":null,"queries":["wastewater field determination subsample preserved specimen repeat analysis","water wastewater cone splitter field analysis acidified chilled subsamples","Handbook sampling sample preservation water wastewater split sample chain custody"],"source_ids":["SRC2","SRC4"]}},"sources":[{"claims_supported":["The procedure applies to wastewater samples collected for field screening or laboratory analysis.","Samples must be protected against contamination and alteration, custody-sealed for shipment or long-term storage, and accompanied by chain-of-custody documentation.","A mixed composite is transferred into respective containers and immediately preserved when required; routine inspections should offer the permittee a split sample.","The procedure addresses equipment blanks, sample security, documented deviations, and field safety requirements."],"publisher":"U.S. Environmental Protection Agency, Region 4 Laboratory Services & Applied Science Division","source_id":"SRC1","source_type":"OFFICIAL_GUIDANCE","title":"Wastewater Sampling, FSBPROC-306-R7","url":"https://www.epa.gov/sites/default/files/2017-07/documents/wastewater_sampling306_af.r4.pdf"},{"claims_supported":["Wastewater often contains unstable pollutants requiring immediate preservation or analysis, sometimes within 15 minutes.","Sampling should include enough volume for split samples or repeat analyses, and facilities may request a split or duplicate.","Field measurements, preservation, holding time, custody, shipment, blanks, splitting, and laboratory quality assurance are established NPDES inspection controls.","Chain of custody is intended to preserve sample validity through analysis and introduction as evidence; improper preservation, mixing, splitting, and holding are common errors."],"publisher":"U.S. Environmental Protection Agency","source_id":"SRC2","source_type":"OFFICIAL_GUIDANCE","title":"NPDES Compliance Inspection Manual","url":"https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P100QU6R.TXT"},{"claims_supported":["40 CFR 136.3 prescribes analyte-specific containers, preservation techniques, and maximum holding times for Clean Water Act analyses.","Holding time begins at collection for grab samples, and shorter times must be used when necessary to maintain stability.","Departures from prescribed preservation, container, or holding-time requirements require supporting stability data and regulatory authorization."],"publisher":"U.S. Government Publishing Office","source_id":"SRC3","source_type":"OFFICIAL_STANDARD","title":"40 CFR Part 136, Section 136.3 and Table II—Required Containers, Preservation Techniques, and Holding Times","url":"https://www.govinfo.gov/content/pkg/CFR-2017-title40-vol25/pdf/CFR-2017-title40-vol25-chapI-subchapD.pdf"},{"claims_supported":["Representative water collections are rapidly subdivided with a cone splitter into subsamples for field and laboratory analyses.","The documented allocation includes a raw field-measurement subsample and distinct untreated, filtered, acidified, or chilled laboratory subsamples.","Splitter accuracy, homogeneity, contamination risks, separate preservation chambers, rapid processing, cleaning controls, and extra subsamples are addressed.","The protocol recognizes that some constituents require immediate field determination while others require prompt preservation and later laboratory analysis."],"publisher":"U.S. Geological Survey","source_id":"SRC4","source_type":"OFFICIAL_GUIDANCE","title":"Collecting and Processing Stream Water Samples","url":"https://water.usgs.gov/nawqa/pnsp/pubs/ofr94-455/sw-t.html"}],"world_novelty_boundary":"This bounded public-web screen found substantial collision with official sampling architecture but cannot establish world novelty, patentability, market size, expert acceptance, implementation prevalence, or realized value. It also does not prove that no jurisdiction, laboratory SOP, patent, instrument package, or evidentiary rule already contains the narrower discrepancy-triggered dual-store combination."}