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COLO29D0 DEP.ARTb9ENT OF PUBLIC HE.4L.TH AND ENVIRONA9EM, W2uer Qrmliry Crnvrol Divtsron <br />Rnnonale - Amenrintent Nn I Page 9, Permit rVo CO-0000221 <br />• LVhole Effluent Toxicity, Acute <br />Ou[jal[s 002 and 003 Annunlh Grab <br />Ourfalls 005. UI U nrrd 0l / Quarterly Grnb <br />Orrrfnl! UUfi Srmr-Anmmlly (:rah <br />Table V!-7 -- Monitoring Requirements jor OutJalls 004 and 008 <br />Parameter tYfeasurement Frequency Sample Type <br />Flow, rv1GD Monthly Lrstantaneaus <br /> or Coruinuous <br />Total Suspended Solids, erg/P Nlonddy Grab <br />Total Recoverable Iron, mg/P Morrrlrly Grab <br />Setrlenble Solids, mP/P Monthy Grab <br />Oil and Grease, rng/P Monthly Visual a/ <br />pH, s. u. hlontlrly !n-situ <br />Total Dissolved Solids, mg/P Quarterly Grnb <br />Table VI-8 -- Monitoring Requirements jor Orufa(l 009 <br />Parameter hfeasurement Frequency Semple Type <br />• Flow, hIGD Monthly Instantaneous <br />or Continuous <br />Total Suspended Solids, mg/P rLforuhly Grab <br />Total /ton, mg/P Monthly Grab <br />Settleable Solids, mP/P Monthly Grab <br />Or[ and Grease, rng/P rYlontirly Visual n/ <br />pH, s. u. >tifontidy In-sint <br />a/ /Ja visible sheen is noted, a grub sample shall be collected and analyzed jor oil and grease. TFre <br />results are to be reponed on the Dh1R under pararneter 03582. <br />There was a typographical error noted in the current pernrit. Part I.B. /.b. (page l4), regarding the sample <br />type jor chronic WET resting. This was changed ro 3 grabs per test in 1994 via amendment number l to the <br />previous permit but not carried over in the current renewal permit. This is being corrected in this n»rendment. <br />Winter Monitoring Exem tp ion: The previous monitoring exemption allowed monthly monitoring in lieu of <br />weekly monitoring for pH, oil & grease and flow dunng the period horn November throttgJr February due to <br />adverse weather conditions. Tire pernrittee asked drat this exemption be e.vended to outfalls 014, OU, 0l6 mrd <br />017. The permittee's representanve was recently injured in the course ojnaempting to obtain samples required <br />under t{ris permit. To protect personnel sajeN, the ezenrption will be modified to suspend monitoring of the <br />affected outfnlls (004, 005. 008. 009, 0/1, 014, 015. 0l6 and 0l7) during periods tiviten access would be <br />lmzardous to the personal henltlr and snfery of personnel. Tiris is consistent with monitoring e.remptions granted <br />. to other perntirtees and rs the only bests under which the Division believes there is justification for granting <br />such an ezenrption. See Pnrt I B.l. of the permit. A previous exemption far Whole Effluent Toxiciq testing for <br />outfalls 004 and 008 jor dre first calendar quarter is carried forward and 1VET resting is included in rhrs <br />exemption beyond the first quarter when innccessihi(irv is documented ns described herein <br />