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M.p. I08-5 C. Ordinary DDT contains about 15% of the 2,4 -isomer, and is prepared from chloral, chlorobenzene and sulphuric acid. It is non-phytotoxic to most plants. It is a powerful and persistent insecticide, used most effectively to control mosquitoes in countries where malaria is a problem. It is stored in the bodies of animals and birds. 

For complete information about books available from Penguin -including Pelicans, Puffins, Peregrines and Penguin Classics - and how to order them, write to us at the appropriate address below. Please note that for copyright reasons the selection of books varies from country to country. 

The Eurosuper as defined by the European Directive of 16 December 1985, offering a minimum RON of 95 and a minimum MON of 85. Found throughout the European countries, it still is fairly scarce in France with 10% of the total demand for unleaded fuels. 

In every part of the world, the same type of classification as above is found for fuels premium or regular, with or without lead. The octane numbers can be different from one country to another depending on the extent of development of their car populations and the capabilities of their local refining industries. The elimination of lead is becoming the rule wherever there are large automobile populations and severe anti-pollution requirements. Thus the United States, Japan and Canada no longer distribute leaded fuels. (... 

The base products, TEL and TML, are liquids having boiling points of 205° and 110° respectively. The contents of additives used are usually expressed in grams of lead per liter of fuel in the past they have reached 0.85 g Pb/1. These concentrations are still found in some of the countries of Africa. Elsewhere, when part or all of the motor fuel pool contains lead, the concentrations are much smaller. Thus in Western Europe they no longer exceed 0.15 g Pb/1. 

However, in some countries such as Germany there is considerable reservation to adding scavengers because of their possible contribution to dioxin emissions. Furthermore, for lead contents of 0.15 g/1, the need for scavengers is questionable. It is possible that the leaded fuels sold in the coming years will contain neither chlorine nor bromine. 

As of 1 July 1991 all new vehicles registered in Europe should have been adapted for using Eurosuper. However, another quality of unleaded fuel had already appeared in 1988 and has since been well established in some countries, notably France. It is called Superplus, the highest octane level, RON 98, MON 88. Superplus is suitable for vehicles having catalytic converters as well as for a large part of the former automotive fleet requiring an RON of 97 and higher. 

In France, Superplus represented in 1993 about 90% of the demand for unleaded gasoline which itself has attained 40% of the total sales. Remember that this is an unusual situation for Europe because in most other countries Eurosuper has the major share. 

Specifications for density, distillation curve and viscosity shown above are for products distributed in temperate climates. Other limits are required for arctic regions, particularly the Scandinavian countries. See Tables 5.13 and 5.14. 

Each country adopts such and such a class as a function of its climatic conditions. France has chosen classes B, E, and F, respectively for the summer, winter, and cold wave periods. The first is from 1 May to 31 October, the second is from 1 November to 30 April, while the third has... 

The European specifications require a minimum cetane number of 49 for the temperate climatic zones and the French automotive manufacturers require at least 50 in their own specifications. The products distributed in France and Europe are usually in the 48-55 range. Nevertheless, in most Scandinavian countries, the cetane number is lower and can attain 45-46. This situation is taken into account in the specifications for the arctic zone (Table 5.14). In the United States and Canada, the cetane numbers for diesel fuels are most often less than 50. 

There are several types of jet fuels according to their civilian or military application, their names can vary from one country to another. 

Utilization of LPG as motor fuel represents only a tiny fraction of the market, on the order of 30,000 t/an in France out of a total 3,000,000 t that is, about 1%. Globally, the fraction of LPG used in the transportation industry is on the order of 5% the other applications are essentially petrochemicals (25%) and the heating fuel sectors (70%). However noticeable openings in the LPG-fuel markets in some countries such as Japan (1.8 Mt), the United States (1.3 Mt), the Netherlands (0.9 Mt), Italy (0.8 Mt) and in certain regions (Latin America, Africa, and the Far East) have been observed for specialized vehicles such as taxis. 

Regarding product characteristics, European specifications were established in 1992. They concern mainly the motor octane number (MON) that limits the olefin content and which should be higher than 89, and the vapor pressure, tied to the C3/C4 ratio which should be less than 1550 mbar at 40°C (ISO 4256). On the other hand, to ensure easy vehicle start-ups, a minimum vapor pressure for winter has been set which is different for each country and depends on climatic conditions. Four classes. A, B, C, and D, are thus defined in Europe with a minimum vapor pressure of 250 mbar, respectively, at -10°C (A), -5 C (B), 0°C (C) and -t-10°C (Z)). France has chosen class A. 

Until 1992, the maximum sulfur level, identical for diesel fuel and homeheating oil, was 0.3% for all of Europe. Nevertheless, certain countries had... 

Around 2000, the regulations should become more severe. In this area, a European limit of benzene of 3% appears very probable certain countries such as Germany are even looking at 1%. In Italy, it was decided towards the end of 1991, to limit benzene to 2.5% for leaded and unleaded fuels in the seven largest cities characterized by having heavy atmospheric pollution concurrently, in these same cities, the overall aromatic contents of gasolines should not exceed 33%. 

The 15W40 or 15W50 oils are the most widespread in temperate climates (Western Europe), while the 20W40 or 20W50 oils are used in relatively warm climates (Mediterranean countries. Middle East, South America). The 5W or lOW grades are used in countries having severe winters such as Scandinavia and Canada. 

For countries in the European Union, the specifications issued by European directives that replace, when they exist, the national specifications. 

In Europe, the CEC (Coordinating European Council for the development of performance tests for lubricants and engine fuels) federalizes the GEC and its counterparts in other European countries. 

The accreditation of a standard is an official act (signed by the Ministry of Industry in France). To prepare standards, governments have mandated private organizations which are responsible for continuously following the rules to reach a mciximum consensus. There is only one such organization per country. They are, moreover, grouped at the European and international levels. 

At the European level, the national organizations from both the EU (European Union, formerly the EEC) and the EETA (European Free Trade Association) are grouped in the CEN (European Committee for Standardization) and its counterpart for the electrical industries CENELEC. The standards published by these two organizations have authority in all EU countries as well as the EFTA countries who have voted their approval, which means that these standards have replaced their corresponding national standards. 

Crude oil name Country of origin Specific gravity... 

Despite such improvements, exploration remains a high risk activity. Many international oil and gas companies have large portfolios of exploration interests, each with their own geological and fiscal characteristics and with differing probabilities of finding oil or gas. Managing such exploration assets and associated operations in many countries represents a major task. 

Even if geological conditions for the presence of hydrocarbons are promising, host country political and fiscal conditions must also be favourable for the commercial success of exploration ventures. Distance to potential markets, existence of an infrastructure, and availability of a skilled workforce are further parameters which need to be evaluated before a long term commitment can be made. 

Management of the environmental impact of projects is of major concern in the oil and gas industry, not only to meet the legislative requirements in host countries, but is also viewed as good business because it is ... 

Certain key stages in the EIA process have been adopted by many countries. These broad stages reflect what is considered to be good practice within environmental assessment and include ... 

The fiscal regime (or tax system) in some countries allows the cost of exploration and appraisal (E A) activity to be offset against existing income as a fiscal allowance before the taxable income is calculated. For a taxpaying company, the real cost of appraisal is therefore reduced, and this should be recognised in performing the cost-benefit calculations. 

If the distribution of gas in a country is run by a nationalised or state owned company, there is effectively a monopoly on this service, and prices for gas distributed through a grid system will have to be negotiated with the distribution company. If the market for distribution is not regulated then opportunities arise to sell gas to other customers and... 

Where the distance to the customer is very large, or where a gas pipeline would have to cross too many countries, gas may be shipped as a liquid. Gas has to be chilled to -160°C in a LNG plant to keep it in liquid form, and is shipped in refrigerated tankers. To condition the gas for liquefaction any COj, HjS, water and heavier hydrocarbons must be removed, by the methods already discussed. The choice of how much propane and butane to leave in the LNG depends upon the heating requirements negotiated with the customer. 

A newcomer company Is a company performing its first project in the country, and therefore has no revenues against which to offset capital allowances. 

Many variations on the above theme exist, and the percentage shares A/ill vary from country to country and from contract to contract. 

National governments play an extensive role in assessing and licensing decommissioning options. Most countries which have offshore oil and natural gas installations have laws governing decommissioning. 

The prime global authority is the International Maritime Organisation. The IMO sets the standards and guidelines for the removal of offshore installations. The guidelines specify that installations in less than 75 meters of water with substructures weighing less than 4,000 tons be completely removed from the site. Those in deeper water must be removed to a depth of 55 meters below the surface so that there is no hazard to navigation. In some countries the depth to which structures have to be removed has already been extended to 100m. 

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