11 Miss. Code. R. § 5-2-280.4-5.2.2 - Removal of Dispenser Islands - Sidewall Contamination Apparent

If any of the sidewalls of the excavation appear to be contaminated, the sidewalls must be sampled. At least two samples are required for dispenser islands less than 50 feet in length when sidewall sampling is necessary. One sample must be collected from the area of the sidewall that appears to be the most contaminated. The second sample must be collected from the floor of the excavation where the most contamination appears to be present. The second sample must be collected from the floor of the piping trench and at least one foot into the native soil. If no area of the floor appears contaminated or it appears uniformly contaminated, the sample must be collected as shown in Figure 8.

If the dispenser island is greater than 50 feet in length and sidewall sampling is necessary, at least three samples are required. One of the samples must be collected from the area of the sidewall that appears to be the most contaminated. The other two samples must be collected from the floor of the excavation where the most contamination appears to be present. However, you should also take into consideration the entire area of the excavation so that both of the floor samples are not collected from the same general area. If no area of the floor appears contaminated or if it appears uniformly contaminated, collected floor samples as shown in Figure 8.

Notes

11 Miss. Code. R. § 5-2-280.4-5.2.2