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NEIL O. ANDERSON <br /> A N D A Sr S O C I A T E S <br /> ' A71effe7C011 COMPANY <br /> SITE VISIT/OBSERVATIONS <br /> DW-2 <br /> ' PLATE 9 <br /> Project Name NOA Drywell Closure Inspection Date 04/01/2014 <br /> Job Number LZV140001 Field Work Time 07:00 — 17:30 <br /> ' Street Industrial Way City Lodi, CA <br /> Client NOA Contact 209.367.3701 <br /> ' YES ❑NO ® (Use back of <br /> Geologist Heather Shaddox Additional Info form) <br /> SUMMARY OF SITE OBSERVATIONS: <br /> Purpose of site activities are to close (2) on-site drywells used for Fog Curing Concrete System drainage. Wells <br /> will be destructed by overdrilling. Soil and groundwater sampling will be performed in the center of the wells, <br /> starting 1-2 feet below the extent of the wells. Well destruction and sampling activities will be performed in <br /> accordance with the Revised Drywell Closure and Investigation Work Plan, dated March 18, 2014 and revised <br /> ' March 20, 2014, prepared by NOA. <br /> Destruction and sampling of the eastern well (DW-2) was performed on April 1, 2014. The western well (DW-1) <br /> was destructed and sampled on March 28, 2014. The eastern well was over-drilled using a 12-inch hollow stem <br /> auger until 47 feet bgs. Depth of casing was determined to be 40 feet bgs. At 47 feet bgs, switched to 8-inch <br /> hollow stem auger. Soil sampling sleeves and groundwater containers were pre-chilled in ice chests. Borehole <br /> logs were taken once soil sampling began and logging of native material was possible. The first soil samples <br /> were taken at 51 feet bgs ("B2@51'-I" and "B2@51'-II'). Soil samples were then taken every 5 feet until <br /> groundwater was encountered. Soil samples were collected at 55 feet bgs ("B2@55'-I") and at 60 feet bgs <br /> ("B2@60'-II'�. In general, the soil samples from the bottom of the sampler were collected because those <br /> contained the most sample. The following groundwater samples were collected: "W2-I" for VOCs, "W2-II" for <br /> SVOCs, "W2-III" for RCRA Metals, "W2-IV" for TPH-Gas, "W2-V" for TPH-Diesel, and "W2-VI" for TRPH. In <br /> addition, a replicate groundwater sample was collected and split between two (2) identical containers, labeled: <br /> "W2-VII-A" and "W2-VII-B", to be analyzed for RCRA Metals. Groundwater pH, temperature, EC, TDS, and DO <br /> were analyzed using a field meter. The eastern well was then grouted using Portland Cement Type II/IV. Both <br /> drywells were then covered and the area will later be cemented. <br /> Inspector Signature <br /> ' LODI • SACRAMENTO • CONCORD <br /> CORPORATE 902 Industrial Way • Lodi,CA 95240 • 209.367.3701 • FAX 209.333.8303 <br />