Paper

Performance and Methodology of an Environmental Audit for Paper Flow in an Office (a Social System)
Kohji Hayase, Hiroshi Akai, Akimichi Hatta and Hideki Wada 215

Leaching Test of Metallic Compounds in Fly Ash of Solid Waste Incinerator
--Availability Test and pH-dependent test--
Shin-ichi Sakai, Satoshi Mizutani, Hiroshi Takatsuki and Takuo Kishida 225

A Study on Elimination of Mercury in Flue Gas Using Grain and Powder from Fly Ash
Masaki Takaoka. Nobuo Takeda and Shigenobu Okajima 235

Theoretical Consideration on Free Convection in a Sanitary Landfill Layer
Hideki Yoshida, Nobutoshi Tanaka and Hitoshi Hozumi 245

The Quantity and Quality of Waste Excess Sludge through Cleaning Discharged from Small-scale On-site Domestic Wastewater Treatment Systems
Takehiko Ogawa, Masaharu Tadokoro and Shigeru Ohno 252