 Example Test Result Analysis
Laboratory: Corrosion Control Consultants and Labs,
Inc.
Test Supervised by: Gary L. Tinklenberg
Setup:
Paint was removed from a typical bridge coated with lead-based paint. The lead content of
the paint on the bridge was 36% (360,000 PPM).
TCLP Results (2 tests were taken)
a. The paint was removed with a needle gun from two
areas, one that was treated with 40 mils (wet) of PreTox 2000 and one which had no
treatment whatsover.The waste generated from the PreTox 2000 treated areas leached (TCLP
Method 1311) lead at 0.75 PPM, while the untreated area leached lead at 35PPM.
b. Paint was also removed using abrasive blasting
techniques. paint was removed using typical production equipment and pressures. The
abrasive was garnet, used at 4 pounds per square foot. The paint was blasted from two
areas, one with no treatment and one which had been coated with 40 mils (wet) of PreTox
2000. The waste generated from the PreTox treated areas leached (TCLP Method 1311) lead at
0.2 PPM (BDL), while the untreated area leached lead at 40 PPM.
MEP Results
The waste generated from each area was analyzed using the Multiple
Extraction Procedure (MEP). The MEP protocol consists of one TCLP followed by nine
leaching cycles using a mild acid solution. The results on the two wastes are as charted.
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