Examined is the development of resistance and secondary pest outbreaks and disease vectors. Two examples are considered in depth. A list of 42 references is included. (CW)

Background information is provided on the registered trademark "TLV" (Threshold Limit Value), the term used to express tolerable concentrations. The TLV of a compound is an estimate extrapolated from some defined damage to humans or animals at higher concentrations or by drawing analogies between similar concentrations. (JN)

This book for middle school science teachers is the second in a series of three safety books intended to offer positive options as they raise awareness of potential hazards in the science classroom. The book is written in narrative style and discusses safety concepts in the context of commonplace situations in real classrooms. Topics covered…

Discusses the role of dissection in science courses, examining essential lessons students can learn (such as developing an abiding respect for all forms of life, including the animal being dissected). Also presents a list of tips related to classroom dissection and comments on formaldehyde and formalin substitutes. (JN)

Discusses the relative instability of organic oxidants, citing early attempts at overcoming the solubility limitations in organic reaction systems. Describes the more recent introduction of new types of organic oxidant salts that have demonstrated more promising levels of stability, though unexpected explosions have still occurred. (TW)

Presents a sample contract for disposing of hazardous wastes in an environmentally sound, timely manner in accordance with all federal, state, and local requirements. Addresses situations where hazardous waste must be disposed of outside the laboratory and where alternate disposal methods are not feasible. (JN)

Presents a scenario related to the disposal of potentially dangerous ether. Several suggestions for dealing with peroxide-forming compounds are included. (JN)

Procedures for recovering silver and cobalt from laboratory wastes (including those resulting from student experiments) are presented. The procedures are generally applicable since only common, inexpensive laboratory reagents are needed. (JN)

Examines the household hazardous waste problem, addressing several areas related to regulation, disposal, and control. Also gives a list of safer alternatives for household cleaners/disinfectants, paint products, and pesticides. Indicates that individuals can collectively make a difference in public exposure by changing purchases and practices.…

The engineer for a California school district describes the asbestos removal from the ceilings of El Camino High School. Discusses forming a design team, use of consultants, specifications, relations with contractors, and staff notification. (MLF)

Environmental and consumer-safety groups are urging caution in the use of pesticides in the schools. Some schools are successfully using integrated pest management (IPM). IPM combines monitoring for pests with the selective use of the least toxic strategies, not all of them chemical. Offers advice and resources to help administrators switch to…

This seven-part guidebook provides information to assist decision makers and other individuals involved in the residential wood energy fuel cycle. It can be used as a tool for designing or implementing programs, strategies, and policies that encourage, prevent, or mitigate safety or air emission related impacts of residential woodburning equipment…

Suggests that a literature survey can alert students to real-life ethical problems surrounding many organic compounds. Topic areas students could explore include: hazards in the workplace, toxic chemicals, and nerve gas structures. Background information and an extensive bibliography are given. (DH)

Draws conclusions on the scientific uncertainty surrounding most chemical use regulatory decisions, examining the evolution of law and science, benefit analysis, and improving information. Suggests: (1) rapid development of knowledge of chemical risks and (2) a regulatory system which is flexible to new scientific knowledge. (DH)

Described is a simple test tube method developed lead analysis of samples of roadside soil. The relationship between the results and the traffic flow indicate car exhausts are the major source of lead pollution. Materials and procedures are detailed. An example of results is provided. (Author/CW)