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From: American Laboratories and Research Services, Inc. P.0. Box 15609 Hattiesburg, MS 39402-5609 601-264-9320 Date: August 31, 1990 To: Mr. William H. Cooper PPG Industries, Inc. Chemicals Division P.0. Box 1000 Lake Charles, LA 70602 The following analytical results have been obtained for the indicated sample which was submitted to this laboratory: Sample I.D. AA04512 Sample location: PPGHC Lab Log 1320-Sol Cont w/ Dowth Collected by: PREJEAN Collection date: 07/31/90 Time: 8:00 Laboratory submittal date: 08/02/90 Time: 20:45 Received by: RLH Validated by: RLH Parameter: Antimony, total Method reference: SW846 7040 Result: less than 10 mg/Kg Date started: 08/15/90 Time started: 14:10 Parameter: Barium, Total Method reference: SW846-7080 Result: 110 mg/Kg Date started: 08/14/90 Time started: 15:25 Parameter: Lead, Total Method reference: SW846-7420 Result: 40 mg/Kg Date started: 08/13/90 Time started: 19:30 Date finished: 08/15/90 Analyst: BAT MDL or sensitivity: 5 Date finished: 08/14/90 Analyst: JSC MDL or sensitivity: 8 Date finished: 08/13/90 Analyst: JSC SL 046129 Mr. William H. Cooper Page: 2 August 31, 1990 Sample I.D. AA04512 (continued) Parameter: Mercury, Total Method reference: SW846-7470 Result: 2.3 mg/Kg Date started: 08/10/90 Time started: 12:35 Parameter: Silver, total Method reference: SW846-7760 Result: 2.5 mg/Kg Date started: 08/13/90 Time started: 16:30 Parameter: Thallium, total Method reference: SW846-7840 Result: less than 10 mg/Kg Date started: 08/15/90 Time started: 14:10 Parameter: Arsenic, Total Method reference: SW846-7061 Result: 6.4 mg/Kg Date started: 08/17/90 Time started: 17:00 Parameter: Cadmium, Total Method reference: SW846-7130 Result: 5.6 mg/Kg Date started: 08/13/90 Time started: 09:00 Parameter: Chromium, Total Method reference: SW846-7190 Result: 54 mg/Kg Date started: 08/14/90 Time started: 12:00 Parameter: Beryllium, total Method reference: SW846-7090 Result: less than 2 mg/Kg Date started: 08/15/90 Time started: 14:10 Parameter: Nickle, TCLP Method reference: SW846-7080 Result: 11 mg/Kg Date started: 08/14/90 Time started: 11:20 MDL or sensitivity: .1 Date finished: 08/10/90 Analyst: JSC MDL or sensitivity: 2 Date finished: 08/13/90 Analyst: JSC Date finished: 08/15/90 Analyst: BAT MDL or sensitivity: .1 Date finished: 08/17/90 Analyst: JSC MDL or sensitivity: 1 Date finished: 08/13/90 Analyst: JSC MDL or sensitivity: 3 Date finished: 08/14/90 Analyst: JSC Date finished: 08/15/90 Analyst: BAT MDL or sensitivity: 5 Date finished: 08/14/90 Analyst: JSC SL 046130