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Ms. Margaret Lagorio <br /> November""6, 1996 <br /> Page 4 I <br /> S <br /> �f <br /> Decontamination Procedures/Containment of Materials , <br /> To maintain quality control during drilling operations, the sampling equipment will be <br /> decontaminated in an Alconox scrub solution and double-rinsed; first in tap water, followed <br /> by a final rinse using distilled water, prior to each sampling`interval. In addition, the hollow- <br /> stem auger and hydropunch sections will be decontaminated with pressurized hot water prior <br /> to drilling each boring to prevent cross-contamination from one boring to the next. <br /> .I I <br /> Wastewater generated during the cleaning processes will be' tored in labeled 55-gallon drums <br /> on the property pending receipt of analytical results and awaiting appropriate disposal and <br /> manifesting. In addition,the drilling cuttings generated through boring advancement will also <br /> be contained within labeled 55-gallon drums and held on the property for disposal. <br /> Closure <br /> I <br /> It is our hope .that the Work Plan provided will meet with your approval on this project. <br /> Should there be any questions regarding the proposed scope of work, please feel free to <br /> contact one of the undersigned at (909) 335-6116. <br /> Respectfully submitted, <br /> SECOR Internat' Incorporated I <br /> f <br /> Nad" a , <br /> S f Engineer j <br /> Attachments: Figure 1 - Site Location Map <br /> Figure 2 - Site Vicinity Map i <br /> Figure 3 - Site Plan <br /> Figure 4 - Typical Groundwater Well Construction.Detail <br /> Well Permits (triplicate) <br /> Master File Record Information Form <br /> Check #110986 for $323.00 <br /> Letter of Authorization <br /> Distribution: (1) Addressee <br /> IN 40007-097-01 <br /> :tar\nov-96\gw-insta.p1n S <br /> i ' i <br />