# Performance Specification Gap in Division 31 Earthwork submittals

> Source: https://deviationcheck.com/divisions/31-earthwork/performance-specification-gap/

A measurable performance property in the submittal (rating, capacity, tolerance, efficiency) does not meet what the spec requires.

## What to look for in Division 31 Earthwork

Key performance parameters in earthwork submittals:
- **Compaction requirement** - percent of maximum dry density per ASTM D1557 (Modified Proctor) or ASTM D698 (Standard Proctor); spec typically requires 95% or 98% - verify submitted value matches
- **Geotextile grab tensile strength** (ASTM D4632) and puncture resistance (ASTM D4833) - must meet AASHTO M288 class minimum
- **Geotextile permittivity** (ASTM D4491) and AOS/EOS (ASTM D4751) for filtration applications
- **Geogrid tensile strength** (ASTM D6637 for geogrids, ASTM D4595 for woven) at specified strain level (2% or 5%)
- **Drainage composite flow rate** (ASTM D4716) at design compressive load
- **Shoring system allowable load** per linear foot or per soldier pile - must match structural engineer's design load
- **Tieback design load vs proof load** - submitted load test procedure must target correct proof load (typically 133% of design)
- **Dewatering pump capacity** (gpm) and head rating vs site hydrogeology requirements
- **Erosion control blanket C-factor** - must meet or exceed specified value for site slope and rainfall intensity

## Severity

Default grade: Blocker. Always a Blocker when the gap touches life-safety or structural performance.