Fluid sampling apparatus having a universal base

A method of drawing samples of fluid, comprising the steps of:

• selecting one of a plurality of different sampler configurations, each having a universal base, a selected one of a composite container holder, a rain water runoff container holder and a sequential sample multiple container holder;
• a selected one of a plurality of locator sleeves, a control section and a cover;
• bringing a sampler of the selected configuration to a selected site appropriate for the selected sampler configuration with at least one sample container and ice;
• drawing samples at the site in a predetermined time sequence into the at least one sample container;
• putting a new selected container holder into an insulated shipping carton with ice and at least one new container and bringing to the selected site;
• removing the selected one of a composite container container holder, rain water runoff container holder and sequential sample multiple container holder and the at least one sample container after the at least one sample has been drawn and inserted into the at least one sample container from the installed sampler;
• removing the new selected container holder and at least one new container from the insulated shipping carrier and inserting into a sampler at the selected site;
• putting the new selected container holder just removed from the sampler into the insulated shipping carton and bringing the insulated shipping carton with ice, filled at least one container to the laboratory for testing of samples.