Sampling Procedure. The first soil samples were collected on April 27 and 28, 1989 in the vicinity of seven of the B-series well▇. ▇ trowel was used to collect surface soil just under the first few inches of the surface. The samples were immediately placed in jars supplied by Sequoia Analytic Laboratory and transported to the laboratory on the same day. The subsurface samples were collected on June 22 and 23, 1989 and were taken from the mound and panhandle areas. This sampling was performed in conjunction with the construction of the six new vapor well▇, ▇▇ve of which were located in the mound and one in the panhandle. A California modified split spoon sampler was used to collect two soil samples from each vapor well: one sample at 1.5 to 2 feet below the surface and one sample at 4.5 to 6 feet below the surface. This sampler collects a 2-inch diameter soil core one foot in length. The cap depth was at least 8 feet at all 6 vapor well▇ ▇▇▇h that all twelve samples were collected from the cap soil. The samples were immediately transferred to jars, sealed, and transported to the laboratory within 24 hours of collection. 132
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Sources: Lease Agreement (Cosine Communications Inc), Lease Agreement (Cosine Communications Inc)