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' the well casing to 48 feet. The casing was filled under low pressure from 62 to 48 feet. At 48 feet, the first perforation was performed under a pressure ranging from 4,200 to 5,600 pounds per square inch (psi) for a period of 30 seconds (see photograph #10, Figure 4). Other perforations were performed at the intervals proposed in the Work Plan. No return flow was observed ' until the perforation at the 20-foot depth interval was in progress. Once again a black colored residue which floated on the free bleed water was observed (see photograph #11, Figure 4). The perforation at three feet was completed at 11:08 at which time the SJPHS inspector arrived on-site. Only one containment pool was used to store overflow grout. Immediately, the inspector questioned BSK and Halliburton personnel about the black floating residue.? In search of a potential source, the inspector went onto the RCM® trailer and examined the black floating residue on the grout/water mix; therefore, he examined the water holding tank in which he observed a floating sheen on top of the water. The inspector indicated that the mixing water supply on the trailer had a diesel odor. The SJPHS inspector stopped abandonment operations until the water tank on the RCM® trailer was 1) 1 emptied and cleaned out and 2) it could be determined what constituted the black floating residue. The inspector informed BSK and Halliburton that the ' mixing water could not be disposed by discharging to the storm sewer system due to the sheen and odor he observed. ' The Halliburton field engineer called their Woodland office for assistance in determining potential sources and causes of the black residue. Also, the field engineer called for a Vac Truck to be dispatched to the site to vacuum out the RCM® trailer. The SJPHS inspector sampled the free bleed water and black residue from inside the 8-inch riser on MW-3 and from the containment pool. BSK and Halliburton sampled the water on the RCM® trailer (pump truck) at the bottom discharge port prior to disposal to the Vac Truck. The sample was collected in a plastic container furnished by Halliburton (approximately two quart size), labeled, and placed in an ice chest with ice. Based on information received on site from Halliburton's Woodland office, it was concluded that the black residue which floated on the free bleed water ' was from the pozzolan in the 50:50 cement/Pozmix® A mix. It was further concluded that the black residue was not noticed the previous day because the grout mix contained two percent bentonite gel which "took-up" the free water 1 and held the black residue in suspension. This information was presented to the SJPI-IS inspector in the field at approximately 12:00. After this discussion, the inspector requested that BSK and Halliburton revert back to the grout mix used on June 1. Halliburton dispatched the twin-bin grout supply truck back to Woodland to dump to 50:50 cement/Pozmix® A and replace it with a cement/Pozmix® A having two percent bentonite gel. The Vac Truck left ' the site at 13:40 as shown in photograph #12, Figure 4. Halliburton had delivered to the site dry-mix samples of pure pozzolan, 50:50 cement/Pozmix® A, and cement /Pozmix® having two percent bentonite gel. &Associates