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August 5, 1988 AGS Job No. 38033-1 <br /> Marlowe Properties, Stockton, California <br /> A portable organic vapor analyzer (OVA) was used in the field to <br /> evaluate semiquantitatively the relative levels of contamination <br /> r in each sample. The readings obtained from each sample are <br /> presented on the boring logs. OVA readings from samples collected <br /> below the ground-water surface (65 feet) ranged from 0 to 38 parts <br /> per million m The soil samples collected above the <br /> P (ppm) . P ground- <br /> water surface produced readings ranging from 0 to 624 ppm. The <br /> highest reading was produced from a sample taken from boring <br /> B-2 (located in the inferred downgradient direction from the tank <br /> pit) at 45 feet below grade. Soil samples collected from boring <br /> • B-1 produced no response on the OVA. <br /> I <br /> Samples collected for possible laboratory analyses were removed <br /> from the sampler and sealed with aluminum foil, plastic caps, and <br /> airtight tape. They were then labeled and placed in aced storage <br /> for transport to the analytical laboratory. Chain of Custody <br /> Records were initiated by the geologist and accompanied the <br /> samples to the laboratory. Copies of laboratory results and Chain <br /> of Custody records are included in Appendix A to this report. <br /> Monitoring well MW-1 was constructed in boring B-2 with 2-inch <br /> inner-diameter, Schedule 40 polyvinyl chloride (PVC) casing after <br /> the original 8-inch-diameter boring was drilled. No chemical <br /> cements, glues, or solvents were used in well construction. The <br /> 8 <br /> Applied GeoSystems <br />