CAMPUS SENTINEL

School Safety Engine

Actionable protocols for principals, athletic directors, and parents based on live CPCB standards.

Daily Outdoor Protocol • 05:45 AM CPCB Directive

RESTRICTED — Mandate Indoor Activities

Station AQI Ingested

168 AQI

Unhealthy

Clinical Context:

Severe respiratory risk. Suspended outdoor assemblies and sports sessions across campuses.

Immediate Campus Action:

All activities shifted indoors with closed doors and HEPA purifiers active.

Morning Assembly

Relocate Indoors

Conduct over public address system if AQI > 140

Mandatory Directive

Recess & Play

Restricted Indoors

Monitor asthmatic students closely

Mandatory Directive

Athletic Training

Cardio Suspended

Substituted with stretching & tactics

Mandatory Directive

Bus Commute

N95 Recommended

Close windows on vehicular transit

Mandatory Directive

Morning Ground-Level Boundary Layer

05:00 AM – 09:30 AM Thermal Inversion Clearance Curve

💡 Shifting Assembly to 08:30 AM = -47% Particulate Dose

Early morning radiative cooling traps cold diesel smog in the bottom 50 meters of air right when school buses run (07:00 AM). As morning solar radiation warms the surface, the atmospheric inversion breaks after 08:15 AM, allowing upward particulate dispersion.

06:00 AM

310

Peak Inversion

Hazardous Trapped Smog

07:00 AM

285

Bus Transit

Severe Ground Layer

07:30 AM

260

Assembly Window

Critical Assembly Hazard

08:15 AM

195

Dispersion Begins

Solar Inversion Breaking

08:45 AM

145

Optimal Assembly

Permissible Safe Window

09:30 AM

120

Recess Cleared

Ventilated Boundary Layer

School Sentinel Administrative Directive: Delay morning outdoor prayer/assembly from 07:30 AM to 08:45 AM. Children absorb 50% more air per kg of body weight than adults; this 75-minute adjustment spares young developing lungs from breathing the trapped overnight diesel inversion layer.

One-Click Parent WhatsApp & SMS Notice

Verified Template

Broadcast pre-cleared respiratory circulars directly to parents over WhatsApp groups and SMS.

🏫 [Delhi Public School Sentinel Notice]06:05 AM

Dear Parent, local morning ground inversion AQI is 168 (Unhealthy). Under CPCB School Protocol, morning assembly and sports drills for Classes Nursery–8th are relocated to indoor auditoriums.

• School transport windows will remain sealed.
• Students with asthma or allergic bronchitis are excused from outdoor drills.
• Outdoor recess will commence after 09:00 AM once solar inversion lifts.

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2,400 Parents Synced

Classroom Clean Air Calculator

WHO Standards

Calculate required Clean Air Delivery Rate (CADR) and ventilation cycles for 40-student rooms.

Typical Classroom:600 sq ft • 40 Students

Recommended CADR:480 m³/hour

Air Changes per Hour (ACH):5.2 Air Changes / hr

Window Ventilation Window:11:30 AM – 02:00 PM

Maintains CO₂ < 800 ppm99.97% HEPA Filtered

5-Day Campus Planning Forecast

Forward projection of surface boundary layer ventilation to schedule inter-school sports matches and sports days.

CPCB Forecast

Monday

154

Caution

Shorten outdoor PE

Tuesday

182

Restricted

Move drills indoors

Wednesday

135

Caution

Asthma students indoors

Thursday

Cleared

Ideal for Sports Meet

Friday

Cleared

Full outdoor activities