text: MAGS is an alternative to discrete and composite soil sampling. MAGS, while it does not describe the sample with as much precision as the previously mentioned sampling methods, is more powerful statistically: it represents a larger area of a site which is more useful in determining the presence of a compound. Besides increasing the accuracy in identifying the presence compounds in the soil, MAGS also can quickly and accurately narrow down the location and spread of the compounds after a few trials. Once the location has been determined, more thorough and traditional soil borings can be done in the identified location, instead of sampling a whole site.
  HSA found particular success using the technique at solvent-impacted sites that were showing signs of rebound after initial remediation efforts. These rebounds are commonly the result of multiple (relatively small) release areas that had not been previously discovered with discrete soil sampling. MAGS can be useful in detecting how effectively the site had been cleaned up post-remediation.