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Ground, contamination and archaeology
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Ground, contamination and archaeologyPDF page 1/13
5.1 Ground, contamination and archaeology Parcel scope: Flurstück 16/24, area 627 m². The review checked Soil class and class boundaries, Geology and unit boundaries, Radon potential and basement response using 7 sources listed in the appendix ledger, retrieved on 27 September 2026. The main result for this parcel is: The BBD query returned 1 InSAR scatterer on or within 50 m of the plot; they are not proof of stable ground beneath unbuilt land. Before committing to the purchase, request BBD-Punktzeitreihe (BBD point time series) and project-specific settlement/movement evidence. SOURCE BGR BÜK200; BGR GÜK250 and 5 more (Appendix A.1) METHOD public-data GIS query and screening AS AT 27 September 2026 GEOMETRY Chapter findings summarised; each finding states its spatial relationship on its own evidence page FIG. 5.1 — Ground, contamination and archaeology BGR BÜK200; BGR GÜK250 and 5 more (Appendix A.1). Analyst read FINDING: The review established: GÜK250 is nationwide landscape context at 1:250,000 scale. CONSEQUENCE: The source position is supported by 6 of 7 responses; one query remains open. For the buyer, this point should be resolved before agreeing price or purchase. NEXT ACTION: ask geotechnical engineer for geotechnical report with boreholes/probes and laboratory results. https://grund-check.de 50 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.2 Questions and evidence on ground and contamination Use the mapped soil unit to scope the geotechnical investigation and commission boreholes. Evidence requested: geotechnical report with boreholes/probes and laboratory results; Office: geotechnical engineer. SOURCE LBEG Hannover · exploration licences, extraction licences and mining property; LLnL Schleswig-Holstein · Verfahrensgebiete der aktuellen Flurbereinigungsverfahren · WFS LfU-SH · dl-de/by-2.0 METHOD public-data GIS query and screening AS AT 27 September 2026 GEOMETRY Questions for the competent authorities; they concern the selected parcel and measure nothing themselves FIG. 5.2 — Questions and evidence on ground and contamination LBEG Hannover · exploration licences, extraction licences and mining property; LLnL Schleswig- Holstein · Verfahrensgebiete der aktuellen Flurbereinigungsverfahren · WFS LfU-SH · dl-de/by-2.0. Analyst read FINDING: geotechnical report with boreholes/probes and laboratory results: geotechnical engineer. CONSEQUENCE: The directional scan looks for real class changes, not a fabricated distance to a raster cell; for “Soil class and class boundaries”, a confirmed response from geotechnical engineer is carried into the purchase review; a qualified, conflicting or absent response leaves that finding unresolved. Authority: radon specialist / building physicist. NEXT ACTION: have this point confirmed in writing by the competent authority before you commit. https://grund-check.de 51 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.3 Soil overview and mapped class boundaries BÜK200 describes mapped soil units at map scale, not at plot scale. The directional scan looks for real class changes, not a fabricated distance to a raster cell. SOURCE BGR BÜK200 · GeoNutzV (BGR dataset metadata / AGB §3) METHOD BGR point class plus four-direction LBGR class-boundary scan where available AS AT 27 September 2026 GEOMETRY classified surface at report point; approximate first changed class in cardinal scan FIG. 5.3 — Soil overview and mapped class boundaries BGR BÜK200 · GeoNutzV (BGR dataset metadata / AGB §3). Analyst read FINDING: Use the mapped soil unit to scope the geotechnical investigation and commission boreholes. CONSEQUENCE: Without boring, contamination sampling, bearing-capacity testing or plot-scale soil boundaries, the map cannot replace a geotechnical report. The point class describes a regional unit, not soil strata within the plot. NEXT ACTION: have this point confirmed in writing by the competent authority before you commit. https://grund-check.de 52 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.1–5.3 · CHECKS, EVIDENCE AND NEXT STEPS 5.1 Ground, contamination and archaeology Source: BGR BÜK200; BGR GÜK250 and 5 more (Appendix A.1) · As at 27 September 2026 5.2 Questions and evidence on ground and contamination Source: LBEG Hannover · exploration licences, extraction licences and mining property; LLnL Schleswig-Holstein · Verfahrensgebiete der aktuellen Flurbereinigungsverfahren · WFS LfU-SH · dl-de/by-2.0 · As at 27 September 2026 5.3 Soil overview and mapped class boundaries Source: BGR BÜK200 · GeoNutzV (BGR dataset metadata / AGB §3) · As at 27 September 2026 Soil class and class boundaries — BÜK200 describes mapped soil units at map scale, not at plot scale. The directional scan looks for real class changes, not a fabricated distance to a raster cell. GÜK250 is nationwide landscape context at 1 — 250,000 scale. It remains a map classification, not a borehole beneath the building. The BfS value is a coarse geogenic model — For a basement it triggers a precaution and measurement strategy, not a predicted indoor concentration. 1 m elevation grid at the plot — It describes terrain, not ground movement. Within 22.5 km of the plot LBEG records no mining title — The nearest field in the area queried is the exploration licence (Erlaubnis) “Schleswig” (geothermal energy from 400 m depth), 24.4 km from the plot. Obtain a written LBEG mining answer before basement, geothermal or deep-drilling design. Before committing to the purchase, request parcel-specific mining- authority response with file number, holder and term from Landesamt für Bergbau, Energie und Geologie (LBEG). geotechnical report with boreholes/probes and laboratory results — geotechnical engineer · Use the mapped soil unit to scope the geotechnical investigation and commission boreholes. ground investigation with borehole log — geotechnical engineer / state geological survey · Use the mapped units with a geotechnical engineer to scope borehole depth and laboratory testing and commission ground investigations. ACTION · radon measurement record and protection plan for ground-contact elements — Plan radon-resistant basement details and commission a recognised long-term indoor measurement. Authority: radon specialist / building physicist ACTION · BBD-Punktzeitreihe (BBD point time series) and project-specific settlement/movement evidence — Commission a level survey and obtain the BBD point time series or geodetic monitoring where movement matters. Authority: BGR Bodenbewegungsdienst Deutschland / surveyor Appendix source ledger — The 7 sources behind chapter 05 are listed there one by one. When you query a finding, quote the source and its retrieval date from that list. BGR BÜK200 soil unit — Verbreitet Parabraunerden bis Pseudogley-Parabraunerden und verbreitet Pseudogleye aus Geschiebelehm (z.T. über Geschiebemergel), gering verbreitet Pseudogley-Braunerden aus Geschiebedecksand über Geschiebelehm und gering verbreitet Kolluvisole über Geschiebelehm (German BGR legend; soils: Luvisols, Stagnosols, Cambisols, colluvial soils; parent material: glacial till, calcareous glacial till, glacial cover sand) CONSEQUENCE — The point class describes a regional unit, not soil strata within the plot. CLEAR · Test geometry — Report point · 1:200,000 scale CONSEQUENCE — Soil class: the unit applies to the report point; at 1:200,000 a class boundary is hundreds of metres wide. https://grund-check.de 53 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.4 Geological overview and unit boundaries GÜK250 is nationwide landscape context at 1:250,000 scale. It remains a map classification, not a borehole beneath the building. SOURCE BGR GÜK250 · GeoNutzV (BGR dataset metadata / AGB §3) METHOD BGR point petrography plus four- direction LBGR class-boundary scan where available AS AT 27 September 2026 GEOMETRY classified geology surface at report point and approximate first changed class FIG. 5.4 — Geological overview and unit boundaries BGR GÜK250 · GeoNutzV (BGR dataset metadata / AGB §3). Analyst read FINDING: BGR GÜK250 petrography: Schluff, tonig, sandig, kiesig (silt, clayey, sandy, gravelly). CONSEQUENCE: Use the mapped units with a geotechnical engineer to scope borehole depth and laboratory testing and commission ground investigations. The point class describes a regional unit, not soil strata within the plot. LIMIT: Without boreholes, groundwater observations and fill-thickness measurements, the map supplies no foundation parameters. https://grund-check.de 54 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.5 Radon potential and basement response The BfS value is a coarse geogenic model. For a basement it triggers a precaution and measurement strategy, not a predicted indoor concentration. SOURCE BfS · Radonpotential / Radonvorsorgegebiete · dl-de/by-2.0 METHOD BfS WMS GetFeatureInfo for radon potential and precaution areas AS AT 27 September 2026 GEOMETRY coarse model polygon at the report point FIG. 5.5 — Radon potential and basement response BfS · Radonpotential / Radonvorsorgegebiete · dl-de/by-2.0. Analyst read FINDING: Modelled geogenic radon potential: 25.9. CONSEQUENCE: Dimensionless BfS model value; not a soil-gas or indoor concentration. LIMIT: No soil-gas test and no indoor radon measurement in this building. NEXT ACTION: Plan radon-resistant basement details and commission a recognised long-term indoor measurement. https://grund-check.de 55 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.3–5.5 · CHECKS, EVIDENCE AND NEXT STEPS 5.3 Soil overview and mapped class boundaries (continued) Source: BGR BÜK200 · GeoNutzV (BGR dataset metadata / AGB §3) · As at 27 September 2026 5.4 Geological overview and unit boundaries Source: BGR GÜK250 · GeoNutzV (BGR dataset metadata / AGB §3) · As at 27 September 2026 5.5 Radon potential and basement response Source: BfS · Radonpotential / Radonvorsorgegebiete · dl-de/by-2.0 · As at 27 September 2026 Evidence limit — Without boring, contamination sampling, bearing-capacity testing or plot-scale soil boundaries, the map cannot replace a geotechnical report. CONSEQUENCE — Use the mapped soil unit to scope the geotechnical investigation and commission boreholes. ACTION — Request before committing to the purchase: geotechnical report with boreholes/probes and laboratory results. Body: geotechnical engineer. By: before purchase. NEXT ACTION — Pause the purchase if: the written authority record or the site investigation changes the ground or procedure assessment. BGR GÜK250 petrography — Schluff, tonig, sandig, kiesig (silt, clayey, sandy, gravelly) CONSEQUENCE — The point class describes a regional unit, not soil strata within the plot. CLEAR · Test geometry — Report point · 1:250,000 scale CONSEQUENCE — Geology: the unit describes the surrounding landscape; 1:250,000 does not resolve thin cover layers. Evidence limit — Without boreholes, groundwater observations and fill- thickness measurements, the map supplies no foundation parameters. CONSEQUENCE — Use the mapped units with a geotechnical engineer to scope borehole depth and laboratory testing and commission ground investigations. ACTION — Request before committing to the purchase: ground investigation with borehole log. Body: geotechnical engineer / state geological survey. By: before purchase. NEXT ACTION — Pause the purchase if: the written authority record or the site investigation changes the ground or procedure assessment. CLEAR · Modelled geogenic radon potential — 25.9 CONSEQUENCE — Dimensionless BfS model value; not a soil-gas or indoor concentration BfS map class — 25.9 falls in class 25 to 30 of the BfS legend. CONSEQUENCE — Range of the dimensionless map class, not a measurement uncertainty interval or a building threshold. CLEAR · Radon class — outside a designated radon precaution area CONSEQUENCE — The statutory designation is only yes or no; it does not replace a measurement in the building. Basement meaning — seal soil-contact surfaces and penetrations, allow for sub-slab ventilation, and measure CONSEQUENCE — screening response, not an indoor concentration CLEAR · Test geometry — Report point · model polygon CONSEQUENCE — Radon: the value belongs to the model polygon around the report point; neighbouring polygons often differ markedly. Evidence limit — No soil-gas test and no indoor radon measurement in this building. Plan radon-resistant basement details and commission a recognised long-term indoor measurement. ACTION — Request before committing to the purchase: radon measurement record and protection plan for ground-contact elements. Body: radon specialist / building physicist. By: before purchase. NEXT ACTION — Pause the purchase if: the written authority record or the site investigation changes the ground or procedure assessment. https://grund-check.de 56 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.6 Coarse elevations and ground movement Map: © GeoBasis-DE/LVermGeo SH · DGM1, retrieved 27 September 2026; 1 m elevation grid at the plot. It describes terrain, not ground movement. The BBD query returned 1 InSAR scatterer on or within 50 m of the plot; they are not proof of stable ground beneath unbuilt land. SOURCE © GeoBasis-DE/LVermGeo SH · DGM1 · CC BY 4.0; BGR ground-movement service · result carried over from chapter 2 METHOD official Land DGM1 tiles, joined into the map frame around the parcel; BBD query with returned InSAR scatterers AS AT 27 September 2026 GEOMETRY one-metre terrain cells clipped to the selected parcel and surrounding map frame FIG. 5.6 — Coarse elevations and ground movement © GeoBasis-DE/LVermGeo SH · DGM1 · CC BY 4.0; BGR ground-movement service · result carried over from chapter 2. 44.69–45.92 m DGM1 within plot 4.4 % Mean plot slope Analyst read FINDING: from DGM1 central differences. LIMIT: BBD InSAR scatterers are radar reflectors; no level survey, settlement monitoring or stable-ground finding. NEXT ACTION: Commission a level survey and obtain the BBD point time series or geodetic monitoring where movement matters. https://grund-check.de 57 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.7 Mining rights and areas Within 22.5 km of the plot LBEG records no mining title. The nearest field in the area queried is the exploration licence (Erlaubnis) “Schleswig” (geothermal energy from 400 m depth), 24.4 km from the plot. The table lists the nearest fields with holder and term. LBEG does not publish restricted building areas under § 107 BBergG, legacy mining or operating plans in this service; it answers those questions in writing. SOURCE LBEG Hannover · exploration licences, extraction licences and mining property METHOD LBEG WFS (NIBIS) for exploration licences, extraction licences and mining property within 22.5 km, nearest or intersecting field, with the WMS layers of the same services; metadata in the GDI-DE catalogue AS AT 27 September 2026 GEOMETRY parcel-to-mining-field distance FIG. 5.7 — Mining rights and areas LBEG Hannover · exploration licences, extraction licences and mining property. 24.4 km exploration licence (Erlaubnis) “Schleswig” from the parcel edge 36.3 km exploration licence (Erlaubnis) “Eckernförde” from the parcel edge Analyst read FINDING: For the purchase decision: Obtain a written LBEG mining answer before basement, geothermal or deep-drilling design. Geothermal energy from 400 m depth · holder: Schleswiger Stadtwerke GmbH · runs until 31 May 2027. CONSEQUENCE: No restricted building areas, legacy mining, operating- plan file, subsidence forecast or private-law compensation analysis. NEXT ACTION: have this point confirmed in writing by the competent authority before you commit. https://grund-check.de 58 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.6–5.7 · CHECKS, EVIDENCE AND NEXT STEPS 5.6 Coarse elevations and ground movement Source: © GeoBasis-DE/LVermGeo SH · DGM1 · CC BY 4.0; BGR ground-movement service · result carried over from chapter 2 · As at 27 September 2026 5.7 Mining rights and areas Source: LBEG Hannover · exploration licences, extraction licences and mining property · As at 27 September 2026 CLEAR · DGM1 within plot — 44.69–45.92 m EVIDENCE: DHHN2016 · 1 m grid CLEAR · Mean plot slope — 4.4 % CONSEQUENCE — from DGM1 central differences Ground movement — 1 BBD InSAR scatterer on or within 50 m of the plot CONSEQUENCE — radar reflectors on structures or hard surfaces; not proof of stable subsoil CLEAR · Test geometry — Grid cells at the parcel CONSEQUENCE — Terrain and ground movement: every elevation is a grid-cell value; InSAR scatterers sit on structures. ACTION · Evidence limit — BBD InSAR scatterers are radar reflectors; no level survey, settlement monitoring or stable-ground finding. NEXT ACTION — Commission a level survey and obtain the BBD point time series or geodetic monitoring where movement matters. ACTION — Request before committing to the purchase: BBD- Punktzeitreihe (BBD point time series) and project- specific settlement/movement evidence. Body: BGR Bodenbewegungsdienst Deutschland / surveyor. By: before purchase. NEXT ACTION — Pause the purchase if: the written authority record or the site investigation changes the ground or procedure assessment. CLEAR · Mining title at the plot — none within 22.5 km CONSEQUENCE — Nearest field in the area queried: exploration licence (Erlaubnis) “Schleswig”, 24.4 km CLEAR · exploration licence (Erlaubnis) “Schleswig” — 24.4 km · S · 173° CONSEQUENCE — geothermal energy from 400 m depth · holder: Schleswiger Stadtwerke GmbH · runs until 31 May 2027 CLEAR · exploration licence (Erlaubnis) “Eckernförde” — 36.3 km · SE · 143° CONSEQUENCE — geothermal energy from 400 m depth · holder: Stadtwerke Eckernförde GmbH · runs until 30 April 2028 CLEAR · Test geometry — Parcel outline to mining area CONSEQUENCE — Mining rights: the distance runs from the parcel outline to the field. A field shows where a title applies, not where drilling or extraction happens. ACTION · Evidence limit — No restricted building areas, legacy mining, operating- plan file, subsidence forecast or private-law compensation analysis. NEXT ACTION — Obtain a written LBEG mining answer before basement, geothermal or deep-drilling design. ACTION — Request before committing to the purchase: parcel- specific mining-authority response with file number, holder and term. Body: Landesamt für Bergbau, Energie und Geologie (LBEG). By: before purchase. NEXT ACTION — Pause the purchase if: the written authority record or the site investigation changes the ground or procedure assessment. https://grund-check.de 59 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.8 Land consolidation and readjustment A procedure area can affect future parcel structure and dispositions. It is not a ground condition and is carried with its own identifier and authority. The plot does not lie in any running procedure area. The nearest is Kielstau und Bondenau (SLF 02), 5.7 km from the plot. The LLnL layer lists only procedures without a final determination (Schlussfeststellung); a closed procedure does not appear here. SOURCE LLnL Schleswig-Holstein · Verfahrensgebiete der aktuellen Flurbereinigungsverfahren · WFS LfU-SH · dl-de/by-2.0 METHOD LfU-SH WFS, layer app:sh_flurbv (LLnL), 10 km radius; measured from the parcel outline to the procedure boundary, with cut-out village cores counted as outside AS AT 27 September 2026 GEOMETRY parcel-to-procedure-polygon distance FIG. 5.8 — Land consolidation and readjustment LLnL Schleswig-Holstein · Verfahrensgebiete der aktuellen Flurbereinigungsverfahren · WFS LfU-SH · dl-de/by-2.0. 5.7 km Kielstau und Bondenau SE · 148° Analyst read FINDING: Test geometry: Parcel outline to procedure area. CONSEQUENCE: 27 September 2026 · SLF 02 · Procedure type: Flurbereinigungsverfahren nach § 1 FlurbG; Handled by: LLnL - Standort Flensburg. LIMIT: No participant file, allocation plan, contribution decision or future parcel guarantee. NEXT ACTION: Ask whether an active procedure affects parcel identity, access, contributions or disposal before contract. https://grund-check.de 60 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.9 Archaeology and ground records OSM is only a feature screen. The official monument/archaeology record and contamination register remain two separate written authority enquiries. SOURCE OpenStreetMap contributors, Geofabrik extract, data as of 22 September 2026 (ODbL 1.0); official Denkmalliste and Altlastenkataster held by the competent authorities METHOD Check for archaeological sites in the OpenStreetMap extract (Geofabrik); official lists deliberately not inferred AS AT 22 September 2026 GEOMETRY nearest OSM geometry in the extract to the report point; no official monument polygon FIG. 5.9 — Archaeology and ground records OpenStreetMap contributors, Geofabrik extract, data as of 22 September 2026 (ODbL 1.0); official Denkmalliste and Altlastenkataster held by the competent authorities. Analyst read FINDING: Official archaeological list: authority-held; not read from OSM. CONSEQUENCE: The query returned no match. Send the parcel identifier and plan to archaeology and soil-protection authorities and attach both written answers to the purchase file. LIMIT: No official Denkmalliste or archaeological-record status, excavation condition, Altlastenkataster entry or soil sample. NEXT ACTION: request Denkmalliste/Bodendenkmalauskunft for the parcel. Request Grundstücksauskunft aus dem Altlastenkataster. https://grund-check.de 61 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24
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5.8–5.9 · CHECKS, EVIDENCE AND NEXT STEPS 5.8 Land consolidation and readjustment Source: LLnL Schleswig-Holstein · Verfahrensgebiete der aktuellen Flurbereinigungsverfahren · WFS LfU-SH · dl-de/by-2.0 · As at 27 September 2026 5.9 Archaeology and ground records Source: OpenStreetMap contributors, Geofabrik extract, data as of 22 September 2026 (ODbL 1.0); official Denkmalliste and Altlastenkataster held by the competent authorities · As at 22 September 2026 CLEAR · Kielstau und Bondenau — 5.7 km · SE · 148° CONSEQUENCE — 27 September 2026 · SLF 02 · Procedure type: Flurbereinigungsverfahren nach § 1 FlurbG; Handled by: LLnL - Standort Flensburg CLEAR · Test geometry — Parcel outline to procedure area CONSEQUENCE — Land readjustment: the distance runs to the procedure polygon, which follows farming boundaries rather than the cadastre. ACTION · Evidence limit — No participant file, allocation plan, contribution decision or future parcel guarantee. NEXT ACTION — Ask whether an active procedure affects parcel identity, access, contributions or disposal before contract. ACTION — Request before committing to the purchase: procedure response with procedure number, status and planned replacement parcels. Body: Landesamt für Landwirtschaft und nachhaltige Landentwicklung Schleswig-Holstein (LLnL). By: before purchase. NEXT ACTION — Pause the purchase if: the written authority record or the site investigation changes the ground or procedure assessment. ACTION · Official archaeological list — authority-held; not read from OSM NEXT ACTION — request Denkmalliste/Bodendenkmalauskunft for the parcel ACTION · Contamination register — authority-held; not read NEXT ACTION — request Grundstücksauskunft aus dem Altlastenkataster Test geometry — Report point · search radius in the extract CONSEQUENCE — Archaeology: the search ran around the report point; the geometries were drawn by contributors. UNRESOLVED · Evidence limit — No official Denkmalliste or archaeological-record status, excavation condition, Altlastenkataster entry or soil sample. CONSEQUENCE — Send the parcel identifier and plan to archaeology and soil-protection authorities and attach both written answers to the purchase file. ACTION — Request before committing to the purchase: Bodendenkmalauskunft/Denkmalliste (archaeology/monument response) and parcel response from the Altlastenkataster. Body: Landesamt für Denkmalpflege/Archäologie und Untere Denkmalschutzbehörde in Schleswig-Holstein; Untere Bodenschutzbehörde / Altlastenkataster der zuständigen Kreis- oder Stadtverwaltung. By: before purchase. NEXT ACTION — Pause the purchase if: the written authority record or the site investigation changes the ground or procedure assessment. https://grund-check.de 62 / 197 Parcel — Gemarkung 1041, Flur 2, Flurstück 16/24