INTERIM GUIDANCE EVALUATION OF SCHOOL SITES WITH POTENTIAL SOIL ...

Linda S. Adams Secretary for Environmental Protection Arnold Schwarzenegger Governor



INTERIM GUIDANCE EVALUATION OF SCHOOL SITES WITH POTENTIAL SOIL CONTAMINATION AS A RESULT OF LEAD FROM LEAD-BASED PAINT, ORGANOCHLORINE PESTICIDES FROM TERMITICIDES, AND POLYCHLORINATED BIPHENYLS FROM ELECTRICAL TRANSFORMERS Revised 06/09/06 (non-substantive revisions made 09/12/06) Guidance Contents
1.0 PURPOSE............................................................................................................ 3 2.0 BACKGROUND.................................................................................................... 3 3.0 USE OF GUIDANCE ............................................................................................4 4.0 LEAD FROM LEAD-BASED PAINT ..................................................................... 5 4.1 Soil Sampling.............................................................................................5 4.1.1 Pre-Demolition Sampling ................................................................8 4.1.2 Post-Demolition Sampling.............................................................10 4.1.2.1 Foundation Present.......................................................10 4.1.2.2 Foundation Removed or Site Graded............................13 4.2 Sample Analysis ......................................................................................14 4.3 Data Interpretation and Assessment........................................................16 5.0 ORGANOCHLORINE PESTICIDES FROM TERMITICIDE APPLICATION....... 17 5.1 Soil Sampling...........................................................................................19 5.1.1 Pre-Demolition Sampling ..............................................................19 5.1.2 Post-Demolition Sampling.............................................................22 5.1.2.1 Foundation Present.......................................................22 5.1.2.2 Foundation Removed or Site Graded............................24 5.2 Sample Compositing................................................................................25 5.3 Sample Analysis ......................................................................................26 5.4 Data Interpretation and Assessment........................................................27 6.0 POLYCHLORINATED BIPHENYLS FROM ELECTRICAL TRANSFORMERS.. 29 6.1 Soil Sampling...........................................................................................29 6.2 Sample Analysis ......................................................................................30 6.3 Data Interpretation and Assessment........................................................31 7.0 QUALITY ASSURANCE/QUALITY CONTROL .................................................. 31 Printed on Recycled Paper Department of Toxic Substances Control
Maureen F. Gorsen, Director 1011 North Grandview Avenue Glendale, California 91201 This document is issued as Interim Guidance subject to review and revision as necessary. It should not be considered enforceable or regulatory in nature, and does not have the force or effect of law or regulation. Mention of trade names or commercial products does not constitute endorsement by DTSC. Lead, OCPs, and PCBs School Interim Guidance 2 Revised 06/09/06 8.0 PRESENTATION OF DATA ............................................................................... 34 9.0 REFERENCES................................................................................................... 36
FIGURES
Figure 1 Determining If Lead in Soil is a Concern Figure 2 Selecting the Appropriate Sampling Strategy for Lead Figure 3 Pre-Demolition Sampling, Placing Sampling Locations and Determining Collection Depths Figure 4 Post-Demolition Sampling for Lead with Foundation Present, Placing Sampling Locations and Determining Collection Depths Figure 5 Determining If Organochlorine Pesticides in Soil are a Concern and Selecting the Appropriate Sampling Strategy
TABLES
Table 1 Pre-Demolition Soil Sampling for Lead, Recommended Minimum Number of Sampling Locations Table 2 Post-Demolition Soil Sampling for Lead with Foundation Present, Recommended Minimum Number of Sampling Locations Table 3 Post-Demolition Soil Sampling for Lead with Foundation Removed or Site Graded, Recommended Sampling Locations and Depths Table 4 Methods and Quantitation Limits for Lead Analysis Table 5 Pre-Demolition Soil Sampling for Organochlorine Pesticides, Recommended Sampling Locations and Depths Table 6 Post-Demolition Soil Sampling for Organochlorine Pesticides with Foundation Present, Recommended Sampling Locations and Depths Table 7 Post-Demolition Soil Sampling for Organochlorine Pesticides with Foundation Removed or Site Graded, Recommended Sampling Locations and Depths Table 8 Quantitation Limits for Organochlorine Pesticides Analysis Table 9 Soil Screening Values for Organochlorine Pesticides for Discrete and Composited Samples Table 10 Recommended Soil Sampling Locations and Depths for Polychlorinated Biphenyls Table 11 Quantitation Limits for Polychlorinated Biphenyls Analysis Table 12 Quality Assurance/Quality Control Samples Lead, OCPs, and PCBs School Interim Guidance 3 Revised 06/09/06 1.0 PURPOSE This guidance is intended to provide a uniform and streamlined approach to initially evaluate proposed school sites where lead from lead-based paint, organochlorine pesticides (OCPs) from termiticide application, and polychlorinated biphenyls (PCBs) from electrical transformers are potential sources of soil contamination. This guidance is not a substitute for professional judgment, supported by technical justification and rationale, of qualified environmental professionals. The purpose is to evaluate the potential soil contamination by lead, OCPs, and PCBs and determine if these levels pose a threat to human health.
This guidance is only intended for evaluating sites for potential human health concerns associated with direct exposure of humans to contaminants in soil through incidental soil ingestion, dermal contact, and inhalation of dust in outdoor air. The screening values contained herein do not consider impact to groundwater or address ecological concerns. If site information indicates that other exposure pathways may be complete or the environment (non-human biota or habitats) may be impacted, a more detailed evaluation should be conducted in consultation with DTSC in a Preliminary Environmental Assessment (PEA). If a school district is unclear or has questions regarding exposure pathways for the site or whether the site can be adequately addressed by this guidance, DTSC should be consulted.
If DTSC determines that results of sampling described in this guidance indicate that a contaminant may pose a risk to human health or the environment, DTSC may require additional characterization of the nature and extent of contamination in a PEA or Supplemental Site Investigation (SSI) (Ed. Code,

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