REMEDIAL ACTION WORK PLAN OPERABLE UNIT 2, LANDFILL ...

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3.3 FIELD QUALITY CONTROL
3.3.1 Pipeline Testing:
Test pipes for leakage by exfiltration tests. Fill the line with water with a minimum
head of 2 feet above the upper end of the pipeline and let stand until the pipe has
reached maximum absorption for a minimum during of 4 hours. After absorption,
reestablish the head and maintain for 2 hours. ”Measure the amount of water required
to maintain this water level. If leakage exceeds 0.2 gallons per inch diameter per 100
feet of pipeline per hour, take corrective actions and retest.
3.3.2 Backfdl compaction:
● Crushed rock: 95% maximum dry density ASTM D1557
● Initial backfdl: 90% maximum dry density ASTM D1557
● Intermediate backfill: 95’XOmaximum dry density ASTM D1557 under roadways;
90940maximum d~ density elsewhere.
3.3.3 Testing Frequency:
● In accordance with Section 02222, EXCAVATION, TRENCHING, AND
BACKFILLING FOR UTILITIES.
END OF SECTION
SY5-13-96/SACTERCffWORDOU2/02720 02720-4 Storm Drainage System