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Antonia Vorster -2- 25 May 1988 source work. I agreed, with the understanding that if a significant ground water problem exists, the soil sampling program must differentiate between contamination from the ponds and the past leachfield. All parties agreed; and 3. Continuous cores will be utilized in the borings until sufficient strati- graphic data is collected to determine the consistency between borings. If it is determined that stratigraphy is very consistent from hole to hole, logging may be reduced to split spoon samples at five foot intervals. On 13 May, i revisited the site to spl it ground grater samples from the monitoring wells. I found that three of the proposed wells (numbers 8, 10, and 11) and the agreed to background well had not been installed. Aiex Blackburn of Moldenhauer stated that well 8 had not been installed because of potential "buried pipe" interferences. No explanation for the omission of the other wells was given. Only well 8 and the upgradient well are crucial to data collection. When I arrived at the site, Moldenhauer was collecting samples without first purging the wells, believing that adequate purging had been accomplished the previous day during well development activities. However, Moldenhauer was not present during well development and had no idea of the quantities of water, if any, removed . It was decided that sample collection would be conducted at a later date using a suction pump to purge the wells. We did proceed, however, 'to measure electrical conductivity values at each of the wells. Samples were collected with a bailer from the wells without prior purging by bailing, thus the measured values may not be reliable. The following values were obtained: Well Number Location EC Value (umhos/cm) 1 adjacent pond 1 700 2 adjacent pond 2 2400 3 SE corner site 200 5 WNW ponds, near horse pens 600 - F On o Nw pus:c.,�, ;, ;tab D 12 7 NW ponds, N edge of site 3600 9 NW ponds, far end of horse pens 100 11 W ponds, in horse pasture 100 The results for wells 2, 6 and 7 ( which lie in almost a straight line northwest of the ponds) indicate significant contamination. Well 1 (on the "upgradient side" of the ponds) and 5 (farther west of the ponds than wells 6 and 7) indicate low levels of contamination. Wells 3, 9, and 11 (which all lie farthest down- gradient of the ponds) indicate no contamination. These results, although tentative, correspond with the expected ground water flow direction. Overall , the latest phase of work has been a significant step forviard in the investigation. However, technical emissions, Inde;isicn, and lack of communi- cation are reducing the cost-effectiveness and efficiency of the pro,iect causing substantial delays in the investigation.