Hazardous WasteHazardous WasteStandard procedures for sample collectionStandard procedures for sample collection

Solid /

Semi-Solid /

Sludge/ oil

Dr. Babasaheb Ambedkar Marathwada University, Aurangabad

Department of Environmental Science

Presented byMahesh. D. Joshi

GuideProf. Dr. N.N. Bandela

ENV-504M. Sc ( SY, Fourth Sem.)

SubjectHazardous Waste Management1

Topics to be covered:Topics to be covered:

Introduction Definition Laws Sampling procedures

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Hazardous waste is regulated by:Hazardous waste is regulated by:

Environmental Protection Agency (EPA)

HAZARDOUS WASTES (Management & Handling) RULES, 1989 notified under the ENVIRONMENT (Protection) ACT, 1986

amended in 2000 and again in 2003 Hazardous Waste (Management, Handling & Hazardous Waste (Management, Handling &

Transboundary Movement) Rules, 2008Transboundary Movement) Rules, 2008..

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Cradle to grave statusCradle to grave status

Under Environmental Protection Agency’s (EPA’s) hazardous waste characteristics regulations under the authority of the Resource Conservation and Recovery Act (RCRA) Hazardous waste has to follow-

Cradle to grave status Hazardous waste is regulated from the moment

it is created through the time of final disposal. Generator is forever responsible for their waste.

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Defination of Hazardous WasteDefination of Hazardous Waste

Hazardous Wastes definition differs from country to country. A generic definition says that

“ A Waste or combination of Waste that pose a substantial present or potential Hazard to humans or the environment, in part because they are not readily degradable, persistent in the environment and are dexterous to human health or natural resources. ”

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Identification of Hazardous WasteIdentification of Hazardous WasteCommon SymbolsCommon Symbols

Flammable

Environmental Hazard

Poison or toxic

Corrosive

Oxidizer Explosive

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Need of SamplingNeed of Sampling

Sampling is the physical collection of a representative portion of whole of a waste.

Sample is to ensure that the sample being collected exhibits the average properties of the whole or the bulk of the waste.

Sample must be collected and handled by means that will preserve its original physical form and composition, as well as prevent contamination or changes.

This can be achieved only by means of adopting appropriate sampling plan, methodology, technique and use of suitable sample collection equipment.

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Sampling StrategiesSampling StrategiesIt should address following things Objectives of collecting the samples Sampling approach (e.g. Authoritative or Random) Types of samples needed (e.g. grab or composite) Selection of sampling locations Number of samples Sampling frequency Sample collection and handling techniques to be used Physical and Chemical Properties of the wastes

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Planning for Sampling

Samples should be collected under the supervision of a qualified Environmental Engineer, Geologist and concerned Chemist/Scientist.

-The waste samples are usually collected from tanks, drums, ponds, piles or form various processing or transporting equipment such as conveyor belts.The sampling plan should be prepared depending on whether the waste to be sampled is a liquid, solid, paste, sludge.

Number of Samples The number of samples and the quality of the sampling procedure must be planned to facilitate characterizing the population of interest and enhance reliability in the final results.

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Major Sample TypesMajor Sample Types

Grab A sample taken from a Particular location at a distinct point in time.

Composite A number of individually collected samples that are combined into a

single sample for subsequent analysis.

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Selection of the Sampling Selection of the Sampling EquipmentEquipmentComposite Liquid Waste Sampler (Coliwasa) The Coliwasa is a device employed to sample free-flowing

liquids and slurries contained in drums, shallow tanks, pits, and similar containers.

It is especially useful for sampling wastes that consist of several immiscible liquid phases.

The equipment consists of a glass, plastic, or metal tube equipped with an end closure that can be opened and closed while the tube is submerged in the material to be sampled.

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Composite Liquid Waste Sampler (Coliwasa)

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Weighted Bottle Weighted Bottle This sampler consists of a glass or plastic bottle,

sinker, stopper and a line that is used to lower, raise and open the bottle. The weighted bottle is used for the collection liquids and free-flowing slurries

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Dipper The dipper consists of a glass or plastic beaker

clamped to the end of a two- or three-piece telescoping aluminum or fiberglass pole that serves as the handle. A dipper is used for the collection of liquids and free-flowing slurries

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Thief

– A thief consists of two slotted concentric tubes, usually made of stainless steel or brass. The outer tube has a conical pointed tip that is rotated to open and close the sampler. A thief is used to sample dry granules or powdered wastes whose particle diameter is less than one-third the width of the slots. This equipment can be procured from any suppliers of laboratory items

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Thief

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TrierTrier

A trier consists of a tube cut in half lengthwise with a sharpened tip that allows the sampler to cut into sticky solids and to loosen soil. A trier is used for the collection of moist samples or sticky solids with a particle diameter less than one-half diameter of the trier. Some kinds of triers can be readily procured from the suppliers of the laboratory items and hardware shops or triers can be fabricated as per the required dimensions

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Auger An auger consists of sharpened spiral blades attached to a

hard metal central shaft. An auger samples hard or packed solid wastes or soil. Augers can be procured from hardware shops and suppliers of the laboratory items.

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Auger

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Scoops and Shovels Scoops and Shovels

Scoops and shovels are used for the collection of granular or powdered material in bins, shallow containers and conveyor belts. Scoops are available at hardware and suppliers of the laboratory items.

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Questions?

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Thanks a lot….

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