SUB-BASE PREPARATION CHECKLIST

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--- SITE CLEARANCE & EXCAVATION ---
[ ] Existing Site Conditions Description
[ ] Excavation Depth (meters)
[ ] Excavation Depth Variance Allowed (meters)
[ ] Obstructions Removed (Select all that apply) (Vegetation, Debris, Topsoil, Existing Utilities, Rocks/Boulders, Other)
[ ] Details of Utility Location and Protection (if applicable)
[ ] Site Clearance Photos (Before)
[ ] Topsoil Stripping & Stockpiling - Method (Stockpiled on Site, Removed from Site, Reused on Site)

--- GRADING & LEVELING ---
[ ] Design Grade Elevation (m)
[ ] Existing Ground Level (m) - Average
[ ] Cut/Fill Depth (m) - Maximum
[ ] Leveling Method Used (Laser Level, Transit Level, String Line, Other)
[ ] Description of Leveling Procedure & Challenges Encountered
[ ] Grade Variance (m) - Maximum Acceptable
[ ] Surface Finish Required (Smooth, Rough, As per specification)
[ ] GPS Coordinates of Leveling Points (Representative)

--- GEOTEXTILE INSTALLATION (IF APPLICABLE) ---
[ ] Geotextile Type Specified? (Yes, No)
[ ] Geotextile Material Specification (e.g., Manufacturer, Grade)
[ ] Geotextile Overlap Width (meters)
[ ] Overlap Orientation (as per specification) (Longitudinal, Transverse, As Specified)
[ ] Installation Method Used (e.g., Unrolled, Laid)
[ ] Check for Damage/Defects (Tears, Punctures, Wrinkles, Contamination, None Observed)
[ ] Upload Photograph of Geotextile Installation
[ ] Area of Geotextile Installed (m²)

--- SUB-BASE MATERIAL DELIVERY & STORAGE ---
[ ] Material Type Confirmation (Crushed Stone, Recycled Aggregate, Other (Specify Below))
[ ] Specify Material Type (if 'Other')
[ ] Delivery Quantity (in tons/cubic meters)
[ ] Delivery Ticket/Receipt
[ ] Material Condition Upon Delivery (Excellent, Good, Fair, Poor)
[ ] Notes on Material Condition
[ ] Storage Location
[ ] Storage Protection Measures (Covered, Contained (e.g., Stockpile Berm), None)

--- SUB-BASE MATERIAL PLACEMENT ---
[ ] Sub-base Layer Thickness (inches)
[ ] Area of Sub-base Installation (sq ft)
[ ] Material Type Verification (Correct Material Specified, Material Substitution Required - Documented, Incorrect Material - Immediate Correction Needed)
[ ] Notes on Material Placement (e.g., specific issues, adjustments made)
[ ] Material Spread Consistency (Consistent Spread, Minor Variations, Significant Variations - Corrective Action Required)
[ ] Photo Evidence of Material Placement
[ ] Material Volume Placed (cu yd)
[ ] Date of Material Placement

--- SUB-BASE COMPACTION ---
[ ] Initial Compaction Test Result (Density)
[ ] Target Compaction Density (%)
[ ] Number of Passes with Compaction Equipment
[ ] Compaction Equipment Type (Plate Compactor, Roller (Smooth Drum), Roller (Padded), Vibratory Roller, Other)
[ ] Notes on Compaction Process (e.g., moisture control, problem areas)
[ ] Moisture Content (%) at Time of Compaction
[ ] Did compaction achieve target density? (Yes, No)
[ ] Attach Compaction Test Reports
[ ] Compaction Supervisor Signature

--- QUALITY CONTROL & TESTING ---
[ ] Moisture Content (%)
[ ] Compaction Test Result (density ratio)
[ ] Particle Size Distribution - % Passing 75µm (Sieve)
[ ] Material Type Verified? (Yes, No)
[ ] Grading Certificate Received? (Yes, No)
[ ] Testing Date
[ ] Comments/Observations
[ ] Attach Test Report (PDF)

--- FINAL INSPECTION & SIGN-OFF ---
[ ] Final Compaction Test Results (Proctor)
[ ] Final Level Variation (Maximum allowed)
[ ] Material Type Verified as per Specification? (Yes, No)
[ ] Any Observed Issues or Deviations?
[ ] Inspection Date
[ ] Inspection Time
[ ] Inspector Signature
[ ] Sub-base preparation meets project requirements? (Yes, No)

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