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Food safety pathogen E. coli growing on an agar plate., bacteria
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Foos safety pathogen E. coli growing on a agar plate, bacteria
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Collection of a water sample for chemical analysis, sampling
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Sampling containers for collecting coliforms and chemicals in water with long exposure.
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Water sampling for coliform bacteria in a river, test, analysis
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Sampling containers for collecting coliforms and chemicals in water with long exposure.
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Sampling containers for collecting chemicals in water with long exposure.