Objection to Development at Brentwood, Glen Rise, Planning Application 26/00322/VAC, 2 4/01264/OUT and 25/01757/REM

This assessment serves as a formal objection to the proposed variation and discharge of conditions at Brentwood, Glen Rise. The application relies on a "siloed" technical narrative that fails to account for how physical site constraints—specifically a 5-6m vertical fall , cohesive clay soils , and unverified infilled ground —intersect to create substantial risk. Critically, the recommendation by the Contaminated Land Officer to discharge Condition 3 is based on a fundamental investigative failure: the applicant's own consultant admits in Document 1469798 (p. 13) that borehole WS04 , specifically intended to target a potentially contaminated infilled pond, was relocated due to "very dense vegetation" and therefore the ground in that specific area remains physically untested. To claim that "if there was significant contamination the report would have identified it" is logically and technically flawed when the primary target area was never accessed.

The Evidence Matrix: Statutory & Regulatory Failures

Visual & Technical Conflict Analysis

The applicant’s visual submissions serve as an aesthetic "silo" that contradicts their own engineering data.

• Slope Suppression: While Document 1469798 (p. 6) confirms a significant vertical fall , Visual Sheets 4 and 5 render the road as a horizontal plane.
• Hydraulic Invisibility: Visual Sheet 4 shows manicured lawns in the southern area where Document 1469798 identifies a 1.00m flood depth risk.
• The Investigative Void: Borehole WS04 was relocated due to vegetation. Consequently, the "Low Risk" label is assigned to the infilled pond area without any direct soil samples from that specific location.

Refutation of Officer Decision (Condition 3)

The recommendation to discharge Condition 3 is technically and legally unsustainable:

1. Circular Logic Failure: The officer claims significant contamination would have been identified, yet the report states that "access was not available" to the primary target area.
2. Model Failure: The probability of detecting contamination dropped to nearly zero because the primary target was bypassed. The software is modelling "virgin soil" where "unstable fill" actually exists.
3. Cross-Discipline Neglect: The officer failed to consider how the "cohesive" clay soil and the 5-6m slope will exert hydrostatic head pressure on any potential "Made Ground," potentially leading to slope instability or "running sands".

LITIGATION RISK ASSESSMENT

The applicant’s reliance on 2D modelling for a 3D environment and the officer's dismissal of physical investigative gaps (WS04) creates a high probability of a successful Judicial Review. Under cross-examination, the "Low Risk" classification would be deemed "Wednesbury Unreasonable," as it is based on a documented 'absence of evidence' rather than 'evidence of absence'.

SITE INTEGRATION CONFLICT SCHEMATIC

These sections of the assessment provides interrogation of technical documentation relating to the proposed development at Brentwood, Glen Rise, Great Glen and is further objection to development of Brentwood, Glen Rise, Great Glen. The analysis identifies technical unfeasibilities and discrepancies across primary themes, mapped to the provided Planning Application and Local Authority (LA) references. The ‘Site Integration Conflict Schematic’ presents these ‘unfeasibilities and discrepancies’ in one simple, easy to comprehend visual, created from the technical presentations reported by the Applicant and supported by the LA Contamination officer on 23 April 2026.

Systemic Integrity Note

The technical body of work is inchoate–a fundamental disconnect between the physical constraints of the land and the technical solutions proposed to manage them. Often called a "Siloed" approach: the Drainage Engineer, the Transport Consultant, and the Geo-Environmental Engineer have each solved a problem on paper, but they have not accounted for how their solutions conflict in the real world. The "intersect" of these three factors creates a logical contradiction that the applicant has yet to resolve:

1. Topographical Fall (5-6m): The site slopes significantly from the north-east to the south-west over a distance of approximately 100m.
2. Infilled Pond Land-Quality: Historical data suggests a pond in the south-eastern area was infilled around 2003. Infilled ground is typically "Made Ground" with unpredictable engineering properties and potential contamination.
3. The Conflict:: Heavy vehicles (refuse collection and emergency fire engines) require relatively level and stable ground to perform the manoeuvres shown in the "Refuse Vehicle Tracking" documents. Navigating a 11.85m refuse vehicle on a significant slope, while simultaneously building heavy-duty drainage attenuation (to manage the 0.30m-1.00m flood risk) on top of unstable infilled land, is a complex engineering challenge that the documents address separately rather than as a single, combined risk.

CONCLUSION

The documentation functions as a collection of disconnected technical parts rather than a unified narrative. It relies on disparate, generalized "Low Risk" classifications while simultaneously documenting physical site barriers (vegetation and slope) that prevented the rigorous testing required to prove those classifications. The narrative, lacking a unified conclusion on how the 5-6m topographical fall and the infilled pond land-quality intersect with the proposed drainage and heavy vehicle access requirements and the Phase I & II Investigation identifying its own physical limitations (vegetation obstructing boreholes) also exclude the external realtime data invalidating the site's "Low Risk" contamination and flooding status.

The specific page and section references from the applicant's documentation that evidence this "siloed" approach are detailed below. These citations highlight how each discipline addresses its specific remit without accounting for the physical conflicts created by the others.

1. The Geo-Environmental Solution (Topography & Soil)
1. Source:Phase I and II Ground Investigation (Document 1469798)
2. Page 6, Section 2.0 (Site Setting): This page explicitly defines the topographical challenge, stating the site "slopes down from the north-east to south-west by 5-6m across the main development area over a distance of approximately 100m".
3. Page 23, Section 10.2 (Earthworks): The report "solves" the slope on paper by recommending a "degree of cut and fill earthworks" to create level platforms.
4. Page 23, Section 10.9 (Excavations): It notes the geology is "primarily cohesive" (clay-heavy), suggesting excavations will be stable.
5. Siloed Gap: It does not address how these cut-and-fill platforms will impact the drainage flow paths or the structural stability required for the heavy vehicle tracking mentioned by the Transport Consultant.
2. The Drainage Engineer's Solution (Infiltration & Flooding)
1. Source:Phase I and II Ground Investigation (Document 1469798)
2. Page 8, Section 3.0 (Hydrology):The report identifies a flood risk in the southern area with "modelled depths of between 0.30m and 1.00m for a 1 in 30-year event".
3. Page 23, Section 10.10 (Groundwater): Shallow groundwater was recorded at 0.80m in borehole WS03.
4. LA Reference Table Link: The Drainage General Arrangement (Ref: 1467738) and Construction Details (Ref: 1467734) propose attenuation systems.
5. Siloed Gap: These systems are designed for the southern "low" area, which is exactly where the 5-6m of vertical water pressure from the slope will accumulate and where the unstable "infilled pond" is located.
3. The Transport Consultant's Solution (Heavy Vehicle Access)
1. Source: LA Document Reference Table (CSV) / Refuse Vehicle Tracking (1467732)
2. Tracking Diagrams: The applicant provides swept-path analysis (Ref: 1356631 and 1467732) showing a 11.85m refuse vehicle successfully manoeuvring within the site.
3. Siloed Gap: These tracking solutions are drafted on 2D flat planes. They do not reference the 5-6m slope which affects a heavy vehicle's turning circle and braking distance, nor do they account for the fact that these manoeuvres take place over the area designated for drainage attenuation and the potentially unstable "infilled pond" ground.

THE "SILOED" CONFLICT SUMMARY

The applicant's narrative is disconnected because:

1. Geo-Environmental report The Geo-Environmental report admits borehole WS04 (targeting the infilled pond) was relocated due to vegetation, leaving the ground quality of the southern access area technically unverified.
2. Transport tracking Assumption: The Transport tracking assumes a stable, level surface for heavy vehicles that the Geo-Environmental report says is currently a 5-6m slope requiring major earthworks.
3. Drainage solution: The Drainage solution places attenuation in the southern area where the soil is "cohesive" (low infiltration) and where the flood risk is highest, without a clear plan for how this interacts with the heavy vehicle loads above it.

Visual vs. Technical Reality Conflicts

The Indicative Visual Sheets (1451290 through 1451293) present a significant aesthetic and technical divergence from the physical constraints identified in the site’s engineering reports.

Systemic Integrity Note

The Indicative Visuals act as an aesthetic "silo" that ignores the fundamental physical constraints documented in the Phase I & II Ground Investigation. By rendering the site as a flat suburban street, the applicant has bypassed the critical engineering question of how the 5-6m slope and hydraulic pressures will be physically accommodated without compromising the depicted site layout.

MODELLING CONFLICTS

The applicant failed to account for these intersecting conflicts. Notwithstanding the ‘overlooked’ data in its technical submissions, whilst the modelling software may be accurate within its own silo the ‘finalised report’ fails to perform "Cross-Discipline Collision Detection". The following assessment identifies where the applicant's modelling failed to meet the physical reality of the site.