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Mr. Kent A. GoYiiam <br />August 24, 1993 <br />Page 2 <br />and was subsequently relocated to the West Roatcap drainage. The <br />station is currently located in West Roatcap and future references <br />to this station will be corrected to reflect this location. <br />4) Future editions of Table 1 will be corrected to show monitoring well <br />MW-O1 elevation as 5716.15. <br />5) Future editions of Table 1 will be corrected to show Spring 31 is <br />located in the West Roatcap drainage. <br />6) These sites will be added to permit maps as appropriate. UERC, <br />La2C, MW-O1, MW-02, and MW-03 are not currently depicted on maps. <br />Wells DH-70 and GR77-7 are located on Map No. 4-1 but are assigned <br />designations DH700 arcs GR777 ]]1 the database. Sites 001-006 are <br />NPDFS discharge points and will be added to the appropriate maps. <br />Monitoring Frequency <br />1) No response required. <br />Water Quality <br />la) Field EC data for station SW-10 was erroneously input to the <br />database. Readings (4) frcnn June to October should all be reduced <br />by a factor of 10. Correczted data will be incorporated into the <br />database and a new data summary will be generated and forwarded to <br />CDMG for incorporation/replacemnt in the 1991 AHR docwnent. The <br />correct 1991 readings all fall within the normal range of DC values <br />established for this station. <br />lb) Spring 25 was noted to be dam ar dry with no measurable flows <br />throughout the 1991 monitoring year (refer to 1991 data listing). <br />No DC measurements were obtainable during the 1991 monitoring year. <br />A review of old data sheets indicates that on most occasions Spring <br />25 flows at extremely low rates. Flow ~++P~~~rements are collected <br />with a portable 60° V-notch weir which is not capable of measuring <br />r flows with any accuracy below approximately 1 can of depth <br />(equivalent to approximately 0.09 gpm = 0.0002 cfs). On instances <br />where flow is oaurring but is less than 1 can, it is possible to <br />carefully collect enough water to run field parameters on <br />(approximately ;cup) without having a flow maa~iram~nt. <br />A discussion of Spring 25 chemistry arcs origin is located on Permit <br />C-81-038 page 2.04.7-36. In su~mnary, this spring is thought to be <br />issuing from bedrock and is related to a fault occurrence in the <br />area. This spring has alorays characteristically shown higher DC <br />readings than other springs in the permit area which more typically <br />have colluvial origins. <br />lc) The general trend of increasing conductivity noted in the AHR <br />narrative is silly an observation based upon the F7C data gathered <br />