Laserfiche WebLink
NOA Drywell Closure and Instigation Work Plan Page 12 of 16 <br /> ' March 18, 2014 <br /> 3.9 Sample Transportation <br /> The sample containers will be tightly sealed and labeled; the label will show the sample I.D. <br /> ' number and other pertinent information. The filled sample containers will be placed on ice after <br /> collection. Samples will be picked up by the laboratory, McCampbell Analytical Inc. Samples will <br /> be transported under chain of custody documentation to McCampbell Analytical, Inc. in <br /> ' Pittsburg, California by McCampbell staff as soon as practical after collection. Sample packaging, <br /> labeling and transportation will follow the Department of Transportation regulations. <br /> ' 3.10 Waste Management <br /> As stated in Section 3.3.2, drill cuttings and decontamination water will be properly <br /> ' containerized and stored as necessary during site activities. Disposal methodologies will be <br /> contingent upon field observations and/or analytical results. Laboratory samples will be <br /> disposed of by the analytical laboratory in accordance with their established protocols. <br /> ' 3.11 Borehole Destruction <br /> Subsequent to soil and groundwater sampling within the boreholes, the open boreholes will be <br /> ' grouted. The grout cement will be given sufficient time to settle and set. The remaining hole <br /> will then be sealed with cement. <br /> 4.0 DRYWELL DESTRUCTION ACTIVITIES <br /> ' 4.1 Pre-Field Activities <br /> Drywell destruction requires a permitting issued by EHD. This work plan, a Master File Record <br /> ' Information Form, and a Site Mitigation Fee must be completed and submitted to EHD for work <br /> plan review and approval. Once the work plan is reviewed and approved, a Well Destruction <br /> Permit along with an Inspection Activity Fee and Permit Fee will be submitted to EHD to obtain <br /> ' the appropriate permit prior to destruction activities. EHD will be notified seven (7) days prior to <br /> field activities to schedule well destruction and sampling activities. <br /> 4.2 Destruction Activities <br /> Drywell destruction will occur subsequent to field sampling activities. NOA proposes to perform <br /> well destruction activities under the direct supervision and oversight of EHD. <br /> III 4.2.1 Well Destruction Methodology <br /> The two (2) on-site drywells will be destructed by overdrilling. The overdrilling method enlarges <br /> the borehole to eliminate all potential channels to contaminant migration. The drywells consist <br /> of three (3) inch diameter casing in an eight (8) inch gravel pack. The wells will be over-drilled <br /> 'I using a hollow stem auger that is eight (8) inches diameter. Drill cuttings will be stored <br /> appropriately until proper disposal is determined and executed. All material within the original <br /> II <br /> ' 902 Industrial Way•Lodi,CA 95240-209.367.3701 •Fax 209.369.4228 02014 Neil 0.Anderson&Associates,Inc <br />