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EL RANCHO ROCK &SAND, INC. QUARRY INVESTIGATION REPORT #2 SURFACE STAINS & SPILLS PAGE 3 The various containers of apparent hazardous materials identified at the site will be collected _ during reclamation of the respective areas and placed within a lined and bermed area prior to disposal. Areas of known surface stains and spills will be marked in the field prior to field screening and excavation. 3.3 Field Screening and Excavation A reconnaissance of the site was made to identify areas of existing surface staining. These areas are shown in Figure 4. Additional stained areas may also be discovered as the reclamation work proceeds. The SJCDEH will be notified prior to the excavation of the stained areas. Materials of the above described "Type 2 Contamination" and "Type 3 Contamination" will be handled as follows: Identifiable and questionable spots and stains will be excavated by hand, or with .r. excavating equipment. Visual identification of the extent of the spot or stain will be used to verify that all of the material was collected. The material will be collected in drums, or otherwise stockpiled on an impervious surface, and covered to limit volatilization. Soils from areas of differing apparent contamination levels (based on coloration differences) will be kept separate until the disposition of the soils is determined. -- A representative from the SJCDEH will be specifically notified and given the opportunity to observe the excavation of the soil adjacent to and beneath the concrete in the area of the concrete pads "B" and "C". This SJCDEH representative may be on site during the soil excavation in other areas as well. 3.4 Sampling Composite, and possible grab samples will be collected from the drums and stockpiles. Composite samples will be collected from soils with similar apparent contamination levels, using a split and quarter method. Composite samples will be considered to be representative of the entire barrel or stockpile. Grab samples may be collected from specific areas where apparent contamination is concentrated. These grab samples will be used to indicate the highest levels of contamination encountered. These samples will be collected and prepared for immediate laboratory analysis, to determine if actual contamination exists, i.e., if the sample collected can be classified as a hazardous waste or hazardous material as defined by California law. While awaiting return of sample results, the potentially contaminated soil will be covered, and left protected from volatilization. NIL, •. _ L� CONDOR