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z# r i-- -:aa. r ' -'h 'S r !ice.. _P,. ...; .z• _ <br /> #4 s�� � ," <br /> 'h <br /> ��' s <br /> If� <br /> Ground-,7Vaier Well Survey I <br /> Moldenhauer Engineering Company(Moldenhauer)of Davis, California, (Registered Civil l <br /> Eraineer No. 17381) surveyed the elevations and positions("x"and "y"lateral coordinates) <br /> o'the wellheads of monitoring wells MW-1 to MW-5 on September 21, 1989. Moldenliauer <br /> measured the monitoring wells with respect to the City of Stockton bench mark 2S-2 at the <br /> intersection of Harding Way and Pacific Avenue. <br /> According to Moldenhauer personnel, Bench Mark 2S-2 is referenced to the United States <br /> Geodetic Survey with an elevation of 10.33 feet above mean sea level. The elevation of the <br /> monitoring wells were referenced to within 0.01 foot of Bench Mark 2S-2. The horizontal <br /> distances were treasured to the nearest 0.1 foot. The elevations were taken at a permanent <br /> notch or arrow on the well casing. <br /> Sample Labelinf,and handling <br /> Water samples were preserved in laboratory-cleaned,40-milliliter glass vials that contained <br /> concentrated hydrochloric acid as a preservative. The water samples were sealed with <br /> Teflon-lined lids to eliminate air bubbles. <br /> The sample containers were labeled in the field with the site identification, monitoring well <br /> number and depth, and date, and promptly placed in iced storage for transport to the <br /> laboratory. The geologist initiated Chain of Custody Records in the field that accompanied <br /> the samples to a laboratory certified by the State of California for the analyses requested. <br /> Samples were transported to the laboratory}promptly. Samples in our custody were properly <br /> disposed of after their useful life had expired. <br /> AVpll&d GOOSwtems <br />