COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

Laboratory Analyses Locations 1, 2 and 3 — Petroleum Hydrocarbons and Metals Soil samples obtained from Locations 1 through 4 will be analyzed by ATL under standard ten working-day turn-around-time(TAT)for the following: • Selected soil samples will be analyzed for total petroleum hydrocarbons as gasoline (TPHg) and diesel (TPHd) following Environmental Protection Agency (EPA) Test Method 8015B modified (160 samples budgeted). • A minimum of two soil samples from each boring with the highest TPH levels will be analyzed for Title 22 metals following EPA Test Method 6010B (mercury Test Method 7471A) (40 samples budgeted). Samples with metal concentrations greater than or equal to ten times the Soluble Threshold Limit Concentration (STLC) will be analyzed for soluble metals using the Waste Extraction Test(WET)method(36 samples budgeted). • Soluble metals that exceed the STLC values will be further analyzed using the EPA Toxicity Characteristic Leaching Procedure(TCLP)extraction method(12 samples budgeted). • A minimum of four randomly selected soil samples from each location will be analyzed for pH using EPA Test Method 9045 (16 samples budgeted). Location 4 -Asbestos Soil samples obtained from Location 4 will be analyzed by EMSL for the following under standard ten working-day TAT: • Each soil sample will be analyzed for asbestos type and content per EPA Test Method 600/R-93/116 using polarized light microscopy(PLM)(40 samples budgeted). • Samples with reported asbestos concentrations less than 1 percent may be re-analyzed for asbestos using PLM 400 point-counting or transmission electron microscopy methods (10 samples budgeted). Laboratory QA/QC Procedures ATL will perform QA/QC procedures for each method of analysis with specificity for each analyte listed in the test method's QA/QC. QA/QC measures as applicable will include the following: • One method blank for every ten samples, batch of samples or type of matrix, whichever is more frequent. • One sample analyzed in duplicate for every ten samples, batch of samples or type of matrix, whichever is more frequent. • One spiked sample for every ten samples, batch of samples or type of matrix, whichever is more frequent, with spike made at ten times the detection limit or at the analyte level. The laboratory will be instructed to homogenize the soil samples prior to analysis for total metals in accordance with Contract 06A1141 requirements. Stockton State Route 99 Improvement Project,Task Order No.82 Caltrans Contract 06A1 141,EA 10-3A 1001 Project No.59200-06-82 -5- December 30,2009