00017966 - Exhibit 7-2_Acceptable Quality Levels.pdf
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- Solicitation number
- S-73000-00017966
- Issued by
- Jackson County, Oregon
About this file
This is an Acceptable Quality Levels (AQL) exhibit for the State of Oregon's Interstate 5 MP 52 to 55 Clear Zone Tree Removal project. The document establishes quality standards and inspection criteria for tree removal and trimming work performed along the specified highway corridor. The AQL standards define both major and minor defects across multiple work categories, including tree damage, clearance requirements, drainage maintenance, and material disposal.
The quality standards address specific performance metrics with zero tolerance for major defects and defined allowable limits for minor defects per mile of work. Tree damage is classified as major when affecting more than 30 percent of the tree bole and minor when affecting 30 percent or less, with zero major defects and ten minor defects allowed per mile. Horizontal clearance, vertical clearance, and height above ground surface share identical thresholds, allowing zero major defects and five minor defects per mile when more than 20 percent falls outside specified limits. Drainage standards permit zero major defects and two minor defects per mile when impeded flow or water diversion occurs. Oversized material requirements prohibit any diameter material greater than three inches remaining on road surfaces or in drainages, with zero tolerance for both major and minor defects. Work area management and safety plan compliance require immediate work suspension if not met, with zero allowable defects in both categories. Rework is required when thresholds are exceeded, with specific triggers such as exceeding five minor defects for clearance work or greater than two minor defects for drainage issues.
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Text version
Acceptable Quality Levels
Description Major Minor Allowable Defects Required Action
Defect Defect Major Minor Major Minor Tree damage Damage to more than
30% of the tree bole Damage to 30% or less of the tree bole
0 per mile 10 per mile Remove or Treat Remove or Treat
Horizontal Clearance More than 20% not cleared to limits
20% or less not cleared to limits
0 5 per mile Rework Rework if greater than 5 minor defects *
Vertical Clearance More than 20% not cleared to limits
20% or less not cleared to limits
0 5 per mile Rework Rework if greater than 5 minor defects *
Height above ground surface
More than 20% not cleared to limits
20% or less not cleared to limits
0 5 per mile Rework Rework if greater than 5 minor defects *
Drainage Impeded flow or water diverted out of drainage structures.
20% or less impeded, but water will stay in the channel.
0 2 per mile Rework Rework if greater than 2 minor defects *
Oversized Material Material greater than 3" diameter remaining on the road surface
Material 1” – 3” in diameter remaining on the road surface
0 0 Rework Rework
Material greater than 3" diameter and 36" in length remaining on the roadway drainages or has the potential to move into drainages.
Material 1” - 3" in diameter and greater 36" in length remaining on the roadway slopes and drainages or has the potential to move into drainages.
0 0 Rework Rework if greater than 0 minor defects *
Description Major Minor Allowable Defects Required Action Defect Defect Major Minor Major Minor
Concentrations
Work Area Management
Any concentrations that affect sight distance
N/A 0 0 Rework N/A
Not following approved safety plan which may include signs, flaggers, and other temporary traffic control measures
Not following approved safety plan which may include signs, flaggers, and other temporary traffic control measures
0 0 Suspend work until in compliance
Suspend work until in compliance
File details come from the government source that posted it. Updated .