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contamination downgradient from MW -4 <br />2 Additional work should be performed in the area of Auger hole <br />"A" in order to determine the source or sources of the high <br />levels of gasoline components found in the hydropunch sample <br />This could include additional auger holes or "push" technology - <br />geoprobe, etc The latter method should work well, water is <br />fairly shallow, and the clays are not well indurated <br />3 A detailed review of known or suspected sources of contami- <br />nation in the area should be made, previously unidentified UST's <br />may be present which could be contributing to the problem It <br />was noted during the removal of the "mystery" clay pipe that an <br />old leach field appeared to extend into the property to the west <br />If such is the case, it was placed prior to the purchase of the <br />property by t Ipresent owners <br />.r <br />A"*/ <br />Wm J H ter & Associates <br />Augu t 9, 1995 <br />cc Joaquin Co EHD <br />W W Miles <br />R Lautze <br />Independent Trucking <br />� �.�F ('.M Ge. <br />4'�iLt+, J HUM ER <br />.�f�t2 cry <br />N4 860 <br />Of C1\0 <br />s � <br />15 <br />