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ql <br /> selected soil samples from beneath the sump, but at or above the water table , <br /> will be submitted to a laboratory for analysis for oil and grease. <br /> The following procedure will be followed for soil samples to be submitted <br /> ' for chemical testing: the sampler will be lined with clean 2.5-inch diameter, <br /> 2-inch long stainless steel sleeves. After retrieval from the auger and removal <br /> s� from the sampler barrel, the exposed ends of each sample sleeve will be covered <br /> ' with 2 mil teflon sheeting, sealed with plastic end caps , secured with electri- <br /> cal tape , and labeled. The labels will include the following information: <br /> (1) boring number; (2) sample number and depth; (3) date and time of collection; <br /> (4) collector name; (5) site name; and (6) site location. The samples will be <br /> stored on ice in the field and transported to the analytical laboratory in an <br /> ice chest cooled with blue ice. Chain-of-custody records (shown on Plate 8) <br /> will be maintained and delivered with the samples to the analytical laboratory. <br /> Between samples, the sampler will be washed carefully ina dilute trisodium <br /> 3� phosphate solution, rinsed in fresh water and then rinsed in distilled water. <br /> Samples will be submitted to Anatec Laboratories , Inc. of Santa Rosa, <br /> California for oil and grease analysis. We anticipate 2 samples will be ana- <br /> lyzed from the boring. <br /> Between borings , the augers and sampling equipment will be steam cleaned at <br /> an approved location in order to prevent possible cross-contamination between <br /> borings. During previous investigations at the site, steam cleaning has been <br /> performed at the City Maintenance Yard, approximately 5 minutes ' drive from the <br /> park. We will verify that this site can again be used for this purpose. if <br /> not, another appropriate site will be selected. <br /> The following procedures will be followed for the well installation: <br /> o A 12-inch diameter borehole will be advanced and sampled to the <br /> appropriate depth using hollow stem auger drilling techniques; <br /> o A capped, threaded 4-inch Schedule 40 PVC screen with machined <br /> 0.020-inch horizontal slots will be emplaced in the bottom of the bore- <br /> hole. A minimum of 10 feet of screened section will be emplaced with <br /> the mid-point at the water table. The screen will be steam cleaned <br /> prior to emplacement; <br /> JED2/H -7- <br />