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' Portions of the three samples were mixed with potable water from the site and it was demonstrated that a black colored residue formed and floated on ' free water from both the pure pozzolan and 50:50 cement/Pozmix® A. This demonstration is shown in photograph #13, Figure 4. ' The hot water, high-pressure cleaner on the BSK drill rig was used to clean Halliburton's pump truck (RCM®). The water sample collected from the pump truck was delivered by the BSK project manager to Chromalab, Inc., a State-certified laboratory, for TPH-Diesel analysis. The sample was released to Chromalab under a Chain-of-Custody Record. The SJPHS inspector called Halliburton's office in Woodland to inform them that under a 'RVotice to Abate" '(copy attached in Appendix A) to: 1) discontinue use of cement/Pozmix® A and 2) not grout additional wells unless the grout mix changed to cement plus three to five percent bentonite. Also, the inspector left a message at the BSK Pleasanton office for the project manager. At approximately 16:30, the BSK project manager called the SJPHS inspector and BSK was informed of the 'Notice to Abate" and that mixing of the grout was not to start until SJPHS approved the water supply. The inspector indicated he would be on site at 8:00 on June 3 to approve the mixing water supply. 3.3 June 3 Activities - The Halliburton twin-bin grout mix truck was on site prior to 08:00 with a 96 percent portland cement and four percent bentonite mix. Just prior to 08:00, the SJPHS inspector approved use of the water on the RCM® trailer. A BSK representative collected a water sample from the bottom discharge in a one liter amber colored glass jar. The jar was labeled Sample #2 Pump Water and placed in an ice chest with ice. ' The equipment was set up over MW-4 and the drill stem and bit assembly were positioned at 55 feet below the top of the well casing (see photograph 1 #14, Figure 4). Cement grout was pumped to fill the casing and then the drill stem was pulled so the jet bit was at 43 feet. The PVC well screen was perforated at this interval with grout overflow being directed to a containment pool (see photograph #15, Figure 4). Density measurements were taken in the field of both the grout mix before perforation and return flow grout using a Mud Scale (see photograph #16, Figure 4). In addition, two-inch by four- inch grout cylinders were cast in plastic molds of both original grout mix and overflow grout. The remainder of the perforations were completed as proposed in the Work Plan. The final perforation at three feet was completed ' at 10:17. The abandonment of MW-4 was completed under the observation of the SJPHS inspector. Two containment pools were used to store overflow grout. ' Prior to starting the abandonment operations for MW-6, Halliburton washed down the pumping equipment as a precaution so that operations would not ' have to be interrupted during completion of this well. Since the casing 7 &Associates