AASHTO T27-23 Sieve Analysis of Fine and Coarse Aggregates Exempt if qualified in Asphalt or Asphalt Extended Module, taken within one year (doesn't apply for written exam) AASHTO R58-22 Dry ...

Representative soil sample testing done in a Los Angeles County Public Health study found a higher percentage of samples with lead levels above health-based screening thresholds taken from parcels ...