OSHA HAZARD COMMUNICATION STANDARD

29 CFR 1910.1200 and Canada. The hazardous products act SOR/88.66 if a product contains more than .1% (one tenth of one percent) of a substance which is considered a carcinogen. These laws require an MSDS advising workers of the hazard and a label which conveys that a potential carcinogen exists. International Agency for Research on Cancer (IARC) 1987 issued monograph #42 a review of "silica and some silicates." IARC classified crystalline silica as a probable carcinogen.

CALIFORNIA CODE REGULATIONS
(Volume 29) Title 22, Div. 4.5 Environmental Health Standards, Chapter 10 through 45
Title 8, Section 5192 - Hazardous Waste Spills Standards
Section 5194 - Hazardous Communications Standards
CAL EPA Hazardous Waste Management (916) 324-1781
(310) 590-4868
10350 Heritage Park Drive, Suite 201
Santa Fe Springs, CA 90670
On November 18, 1992, the EPA passed a final rule that "prohibits" the disposal in hazardous waste landfills of liquids that have been sorbed in materials that "biodegrade." Effective May 18, 1993, this rule is intended to help assure the stability of materials and prevent leaching of hazardous liquids in hazardous waste landfills (40 CFR, Subpart N, 264.314, Special Requirements for Bulk and Containerized Liquids).

PAINT FILTER TEST
The Paint Filter Test (Method 9095) is used to simulate the behavior of liquids contained in sorbents to be placed in landfills. The purpose of the PFT is to determine if liquids will be released from containerized sorbed wastes. The basis for the test comes form Section 3004 (c) (2) of HSWA, which prohibits the placement of bulk or containerized liquids in landfills. The PFT is a simple, easy to conduct test that is relatively inexpensive to perform.

The Paint Filter Test has been used to determine the presence of free liquids in bulk or containerized waste since 1985. It consists of placing a sample (normally 100ml or 100g) into a conical paint filter (mesh number 60). The paint filter is suspended from a tripod or ringstand for five minutes. If any portion of the material passes through and drops from the filter, the material is deemed to contain free liquids and cannot be disposed of in a landfill.

TCLP (TOXICITY CHARACTERISTIC LEACHING PROCEDURE
A representative sample of the liquid-loaded sorbent, standing 10 cm high in device, is placed between twin stainless steel screens and two stainless steel grids. An absorptive filter paper is placed on the side of each stainless steel grid opposite the sample. A compressive force of 50 psi is applied to the top of the sample for 10 minutes. Release of liquid is indicated when a visible wet spot is observed on either filter paper.