Document ID: EPA-HQ-RCRA-2006-0984-0081
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2007-01-18T05:00Z

The Motor Vehicle Manufacturing Industry Applying Aluminum Parts --

Leachable Mercury Data

Facility Name	City	State	Sample Date	Sample ID	Duplicate Indicator
Constituent Name	Leachable Actual or Calculated	Analytical Method
Leachable Result	Leachable Units	Leachable Non-Detect Indicator
Leachable Detection Limit mg/L	Leachable Detection Limit Data Qualifier
Description

Ford MI Truck/Wayne Integrated Stamping & Assembly	WAYNE	MI

Drum #4	N	mercury	actual

0.0002	mg/L

0.0008	J	The associated value is an estimated quantity.

GM Oklahoma City	OKLAHOMA CITY	OK	12/16/1997	OKL-S01-04	N	mercury	actual

0.484	mg/L

	JX	Estimate, one of the OWEP extractions was ND, final result
conservatively calculated using the sample quantitation limit in the
final calculation of mobile metals concentration.

GM Orion Assembly Center	LAKE ORION	MI	5/5/1999	99-06 WWTP #1	N	mercury
actual

0.001	mg/L

0.0002

GM Pontiac East Plant	PONTIAC	MI

PE-7	N	mercury	actual

0.0004	mg/L

	J	Estimate

NOTES:  

1.  As noted in cell R2, the leachable mercury result for sample
OKL-S01-04 is an estimated value.

One of the OWEP extractions was ND, and the final result was
"conservatively calculated using the

sample quantitation limit in the final calculation of mobile metals
concentration."

2.  The leachable mercury concentration of 0.484 mg/L for sample
OKL-S01-04

appears to be erroneous.  Inherent in the TCLP leaching test is a
20-fold dilution due 

to extraction of 100 grams of sample with two liters of water in the
procedure.  As such, 

based on the corresponding total mercury concentration of 0.67 mg/kg,
the maximum

leachable mercury concentration that could be extracted from this sample
should be

1/20th of 0.67 mg/kg, or 0.033 mg/L.  Therefore, the above leachable
results are

corrected as follows:

	Sample ID	Leachable Result

	-----------------------------	---------------------------

Drum #4	0.0002	mg/L

OKL-S01-04	0.033	mg/L	OKL-S01-04 excluded

99-06 WWTP #1	0.001	mg/L

PE-7	0.0004	mg/L

n 	3

	MAXIMUM	0.001

	MEAN	0.000533333

	MEDIAN	0.0004

	Std. Dev.	0.000416333

	90th Percentile	0.00088

	50th Percentile	0.0004