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All samples will be obtained by a trained geologist working directly under the supervision of the above mentioned registered geologist. The samples will be collected, preserved, labeled and chain of custody hand delivered to ChemTech Analytical Laboratories, 3017 Kilgore Road #110, Rancho Cordova, CA 95742 (915-635-3962) . ChemTech is a State of California certified lab (#359) . All soil samples obtained from borings and/or excavtions will be analyzed using the following EPA and DOHS methods: 5030 for extraction, 8015--TPH, 8020-BTEB, DOHS-TEL and BDB-DOHS-AB 1803. Initial sampling showed that TEL and EDB does not exist at this site these analyses will not be carried on to the next samples, see Table 1. Along with supervising the drilling, the on-site WEGE geologist will also conduct the health and safety monitoring and provide the safety plan for this site (health and safety officer) , Appendix A, and the sample collection and preservation for this site. All soil excavated during the boring process will be placed on and covered with a 6 mil polyethylene liner(s) . The borings will be constructed as vapor recovery/monitoring wells and if ground water is encountered ground water recovery/monitor wells. WELL CONSTRUCTION The wells placed in the borings produced by the Versadrill will be constructed using Bch 40 P480 PVC. The PVC will be machined slotted from the total depth of the boring to the 15 foot depth, 0.01" slot. After placement of the PVC casing a sand envelop, consisting of #1,/20 monterey sand, will be placed from total depth to the 15 foot depth, (ground water may rise to the 30 foot depth) the remaining envelop will consist of 1/4" pea gravel from the 25 foot depth to the 10 foot depth within the excavation, utilizing the base of the excavation as a vapor extraction well. The remaining excavation will be backfilled and compacted with the cleaned excavated soil noted as SP2, SP3 and SP4, once laboratory results demonstrates that this soil is below the action levels to gain permission from San Joaquin County Health to place this soil back into the excavation. Once the backfilling has taken place the vapor extraction wells will be manifolded to a common treatment area and tamper proof traffic boxes placed to secure thew, see figure 3 and table 2 for well construction details, PRODUCT LINE TRENCHES To economically determine the vertical extent of petroleum contamination associated with the product lines, a 4" diameter hand auger with sampler and driver will be utilized, see Figure 2. The holes will be hand augered in five foot intervals, the auger then will he withdrawn and a sample barrel that c.)nt&ins one 2"x610 sterile brass slcjve will be placed at the base of the hole and hand driven to obtain a sleeved sample for certified laboratory s2