Laserfiche WebLink
WORK PLAN FOR LIMITED SITE INVESTIGATION Irerracon <br /> Premium California Orchards, Tracy, California <br /> January 8, 2021 Terracon Project No. NA207103 <br /> 2.4 Permitting <br /> In conjunction with this Work Plan, Terracon has completed a SJCEHD Site Mitigation Well & <br /> Boring Permit Application (see attached). <br /> 2.5 Utility Location and Geophysical Survey <br /> Following SJCEHD approval of this Work Plan, and no later than 72 hours prior to intrusive <br /> activities, Terracon will contact Underground Service Alert (USA) 811 North to arrange for <br /> underground utility locates at the site. <br /> To further evaluate the underground utilities at the site, a geophysical survey will be performed in <br /> the vicinity of each of the proposed sample locations where mechanical drilling will be performed. <br /> Terracon will utilize ground-penetrating radar(GPR)to detect any concealed utilities at each select <br /> sampling location. GPR activities will be completed on or before the first day of planned drilling <br /> activities. <br /> 2.6 Sampling and Laboratory Analytical Program <br /> The proposed sampling locations may be modified in the field to account for access limitations <br /> and/or site conditions. The client will be notified of any significant modifications to the sampling <br /> locations. The sampling and analytical program are summarized in Table 1 below. Details on <br /> sample collection and handling procedures are provided below. <br /> Table 1. Soil Samples and Laboratory Analysis <br /> Boring Depth* No. Soil Groundwater Groundwater <br /> Boring No. (Feet) Samples Soil Analytical** Sample? Analytical <br /> S13-1 /TSW-1 50 2 TPH-CC, VOCs, CAM 17 Metals Yes, if TPH-CC, <br /> encountered VOCs <br /> S13-2 15 2 TPH-CC, VOCs, CAM 17 Metals No N/A <br /> SB-3 15 2 TPH-CC, VOCs, CAM 17 Metals No N/A <br /> SB-4 15 2 TPH-CC, VOCs, CAM 17 Metals No N/A <br /> S13-5 15 2 TPH-CC, VOCs, CAM 17 Metals No N/A <br /> S13-6 15 2 TPH-CC, VOCs, CAM 17 Metals No N/A <br /> "Soil boring depth will be based on field observations and photoionization detector screening. <br /> "TPH-CC=Total Petroleum Hydrocarbons Carbon Chain as gasoline-range organics(TPH-GRO),diesel-range organics(TPH-DRO), <br /> and oil-range organics(TPH-ORO)by EPA Method 8015. <br /> VOCs=Volatile Organic Compounds by EPA Method 8260 <br /> CAM 17 Metals=California Administrative Manual 17 Metals(arsenic, mercury, antimony,barium,beryllium,cadmium,chromium, <br /> cobalt,copper, lead,molybdenum,nickel,selenium,silver,thallium,vanadium,and zinc by EPA Methods 6010/6020/7471 <br /> Responsive■ Resourceful ■ Reliable 3 <br />