FEMArecommends that water treatment products sold in camping or surplus stores should not be used, unless the only active ingredient is 5.25 percent hypochloritE. When adding liquid bleach, it should contain 5.25 percent hypochlorite and no other added cleaners or scents. Distilling the water is the most highly recommended method, as it also removes other chemicals and heavy metals, as well as most microbes. Source: Emergency Water and Food Procedures, Federal Emergency Management Agency, April, 1997.

Explanation/Reference:
Explanation:
Qualitative risk assessments quantify the level of risk whereas quantitative risk assessments place a monetary value on the effect of risk. For example, a qualitative risk assessment may use a scale such as low risk, medium risk and high risk or a 1 to 10 scale.
One risk assessment methodology is called FRAP, which stands for Facilitated Risk Analysis Process. The crux of this qualitative methodology is to focus only on the systems that really need assessing to reduce costs and time obligations. It stresses prescreening activities so that the risk assessment steps are only carried out on the item(s) that needs it the most. It is to be used to analyze one system, application, or business process at a time. Data is gathered and threats to business operations are prioritized based upon their criticality. The risk assessment team documents the controls that need to be put into place to reduce the identified risks along with action plans for control implementation efforts.
Incorrect Answers:
B: Quantitative, not qualitative risk assessments provide specific quantifiable measurements of the magnitude of the impacts.
C: Quantitative, not qualitative risk assessments make a cost-benefit analysis of recommended controls easier.
D: Quantitative, not qualitative risk assessments can easily be automated or at least partially automated.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 79

The most commonly used fence is the chain linked fence and it is the most affordable. The standard is a six-foot high fence with two-inch mesh square openings. The material should consist of nine-gauge vinyl or galvanized metal. Nine-gauge is a typical fence material installed in residential areas.
Additionally, it is recommended to place barbed wire strands angled out from the top of the fence at a 45(o) angle and away from the protected area with three strands running across the top. This
will provide for a seven-foot fence. There are several variations of the use of "top guards" using V-
shaped barbed wire or the use of concertina wire as an enhancement, which has been a
replacement for more traditional three strand barbed wire "top guards."
The fence should be fastened to ridged metal posts set in concrete every six feet with additional
bracing at the corners and gate openings. The bottom of the fence should be stabilized against
intruders crawling under by attaching posts along the bottom to keep the fence from being pushed
or pulled up from the bottom. If the soil is sandy, the bottom edge of the fence should be installed
below ground level.
For maximum security design, the use of double fencing with rolls of concertina wire positioned
between the two fences is the most effective deterrent and cost-efficient method. In this design, an
intruder is required to use an extensive array of ladders and equipment to breach the fences.
Most fencing is largely a psychological deterrent and a boundary marker rather than a barrier,
because in most cases such fences can be rather easily penetrated unless added security
measures are taken to enhance the security of the fence. Sensors attached to the fence to provide
electronic monitoring of cutting or scaling the fence can be used.
Reference(s) used for this question:
Hernandez CISSP, Steven (2012-12-21). Official (ISC)2 Guide to the CISSP CBK, Third Edition
((ISC)2 Press) (Kindle Locations 24416-24431). Auerbach Publications. Kindle Edition.