The Sampling Design Guidelines contained text book approach to statistical sampling for contaminated sites, but over-ruled this flexible approach by requiring set grid separation distances. Table 2 used a one risk profile to fit all approach, over-ruling the ability to use calculated methods to determine an appropriate grid for systematic sampling. ASBG recommended that at least 4 types of default risk profiles should be used, where the user can undertake a simple risk assessment and then apply the appropriate default grid, or use a fully calculated statistical model as described in the Guidelines, justifying an alternative grid. ASBG also recommended a similar approach for stockpile sampling where table 4 has the minimum sampling criteria, but leaving no room for homogeneous stockpiles. Additionally, provision for dealing with stockpiles where sampling access is limited due to safety or other reasons should be also considered.
 ASBG’s Submission on draft NSW EPA's Sampling Design Parts 1 & 2 | 774 kB |
