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QCT-14-99 THU 09:46 SHEPI~RD MILLER [NC FAX NO, 97037171 P. 07 <br />continue forded evaporation through tltt summer months, then switch to a nanofiltratiort system <br />for the winter months. IJMRT/BMG predicts that this will continue for one to two years. Ttto <br />future plan is to install a passive treatment system which will bo field tested in the near future. <br />Seep Areas on Bank of Rito Seco Creek <br />The first area viewed by the inspectors was the area of the original seep identitied by <br />BMCi on October 27, 199b. The seep area was surrounded by an electrified fence ann a silt fence <br />on the bank of the Rito Seco Creek. Hay had been spread over the bank area (photo :~). A <br />corrugated metal fence had been installed between the seep area and the trite Seco Creek (photo <br />G). According to Mr.lumwalt, the fencing is composed of interlocking mersl plates t;,yically <br />used in irrigation channels. Mr. Zumwalt estimated that the plates extended opproximatcly twelve <br />to fourteen inches into the soil. <br />A submersible pump is [orated near the corrugated fence. Water is then pumped from this <br />area to a trench drain system in the West f it (photo 7). Mr. Zumwalt stated that the pumping rate <br />prior to Tune 4, 1999 was approximately 49 gpm. Ms. O'Cennor used an Apollo 920 hsndheld <br />GPS device to determine the following coordinates of the seep area : Latitude 37° I5.192'N, <br />Longitude t OS ° 20.50G'W. Standing water was observed in the area of the submersible pump <br />(photo tt). Photo 9 shows the corrugated metal fencing slightly downstream of the pump. <br />inspectors observed wafer flowing flrom behind the corrugated metal fence to the Rito ~Seeo <br />Cncek. <br />[nspeaors then moved upstream to a second seep area, which was discovered <br />June 4, 1999. A eorrugoted metal fence was also installed between this seep area and lire Etitu <br />Seco Creek (photo l0). A submersible pump was also installed in this seep area (photo i I ), <br />Water pumped from this area is combvted with water tYOm the first seep azea and pumped back to <br />the West Pit, Ms. O'Connor used an Apollo 920 handheld tsPS device to determine tht: ti>Ilowirtg <br />coordinates of the leap area ; Latitude 3"7° 15.144'N, Longitude I0~"20.42G'W. Flowing water <br />(photos 12 and 13), as well as boggy areas (photo 14) were observed on the upland aide of the <br />corrugated metal fence. Nui:~crous dead trees were noted in the area (photo l i). Reddish-orange <br />discolor'aGon was observed in areas of the trite Seco Creek adjacent to the seep area tplrotos 16 <br />and 17), Inspectors observed water bubbling ug on both the upland and trite Seco Creak side of <br />the corrugated metal fwtce. <br />Inspectors also observed alt uncontained a~ep on the bank of the Rito Seco Crae~ located <br />between the two previously identitied seep areas. <br />Sampling locations and sequenre were then derided by the inspectors. All samples were <br />collected by Ms. Inman. Field tests were pcrforrned by Ms. O'Cotutur fur pt{ and tempc:amro at <br />each location. Samples were also collected for Ammonia, NitratdNitrite, Sulfate, Chloride, <br />Fluoride, TSS, TDS, dissolved metals, and total recoverable metals. AMR! Drovided ire own <br />bottles and accepted split samples from rho i~apectors. Sampling proceeded as follows: <br />Ul1WC161ti~gtitliltQ S~'R GrFelc $rrrtefc <br />Sampling location corresponds to the downstream monitoring point used by BMRT <br />Sample Name: RS-5 <br />-. ., J.~~n.~ ~ ~rt , , no_ cr0_Tfl 1 <br />