Findings & Recommendations for the Remediation of Historic Pesticide Contamination - Final Report March 1999
Table of Contents

Addendum 5

Site Investigation Sampling Methods

If contamination is detected, additional remedial investigation sampling may be necessary to determine the vertical and horizontal distribution of the contamination which is needed to develop a specific remediation plan. The Department should be contacted to oversee additional sampling and remedial action.

Sampling should be conducted pursuant to the Department’s Field Sampling Procedures Manual and analysis conducted by certified laboratories pursuant to the Technical Requirements for Site Remediation, N.J.A.C. 7:26E-2.

Site Investigation Sampling

Sample location and depth:
Discrete samples should be taken at a depth of 0-6" within farm fields. If extent of former fields cannot be determined, the entire property should be sampled.

Sample frequency:
Sampling frequency is dependent on the size of the site:

Sites<1-10 acres, 1 sample for every 2 acres with a minimum of 2 samples; then sites>10 acres add 1 sample for every 5 acres. A reduced sampling frequency may be appropriate for very large sites.

Analytical Parameters
All samples should be analyzed for arsenic, lead and a pesticide scan (SW 846-8081A). The pesticide scan includes a total of 20 compounds including DDT, DDD, DDE, dieldrin and chlordane (see pesticide analyte list in Addendum 2). All analytical results obtained from the pesticide analysis should be provided to the reviewing agency.