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LEVI N E•FRICKE r Task 4: Develop a Health and Safety Plan for Site Sampling r-- As required by federal law, a Health and Safety Plan will be pre- pared addressing the specific health and safety issues for work- ers at the Site. The plan will be reviewed by Levine•Fricke personnel and subcontractors prior to commencing work at the Site. i . r Task 5: Conduct Sampling of Soil and Ground Water Field Area Soil samples will be collected in the cultivated area (field ' - area) of the Site to enable assessment of the possible presence of elevated concentrations of agricultural chemicals (pesticides and herbicides) . For the field area sampling program, the Site will be divided into six sections. These section divisions are based on the current irrigation and drainage layout of the culti- r- vated portion of the Site. Soil samples will be collected at approximately I- and 3-foot depths below ground surface from a total of 23 sampling points (see Figure 3 for field area sampling locations) . Soil samples collected at the 1-foot depth interval from sampling locations within each of the six sections of the field area of the Site will be composited at the laboratory into one sample for ' each section; the six resulting composited samples will be sub- mitted for chemical analysis. A portion of each of the 23 dis- crete samples from the 1-foot depth interval and the discrete samples from the 3-foot depth samples will be held by the labora- tory for possible future analysis, depending on the results from the composited samples. In the event that significant concentra- tions of agricultural chemicals are detected in the composited +_ samples, the discrete samples from the 1- and 3-foot depth inter- vals may be analyzed to further define the lateral and vertical extent of the analytes detected in the composite samples. (Note: ,J Although holding times for such held samples may be exceeded by the time a decision to proceed with their analysis can be made, analysis would still provide data useful for purposes of this investigation. ) F Field area soil samples will be tested for the presence of meth- ane gas using a portable Organic Vapor Analyzer (OVA) with a Flame Ionization Detector (FID) . A previously conducted geotech- nical investigation entitled "Report, Geotechnical Investiga- tion, Proposed Brookside Development, Stockton, California, " by J.H. Kleinfelder and Associates, June 16, 1987, reported that high organic content soils were encountered at shallow (1 to 3 foot) depths in the northeast portion of the Site. Methane gas -4-