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SAN JOAQUIN COUNTY <br /> 09-01-r995 ee:37an FRCM SM1M M 46e3433 a.oz PUBLIC HEALTH SERVICES <br /> ENVIRONMENTAL HEALTH DIVISION <br /> SEMCO P. 0. BOX 2009, STOCKTON,CA 95021 <br /> PHONE: (209)468-3420 1. <br /> ENVIRONMENTAL&GENERAL ENGINEERING CONTRACTOR <br /> LICENSE#449864 A.11,C61/D40,HAZARDOUS CERTIFICATION <br /> 1217 So.7th STREET,MODESTO,CALIFORNIA 95351(Z09)524-653 <br /> (209)-'M4-9653,FAM (209)524-0503 XApproved <br /> Q rJ Approved with changes- See Re narks <br /> September 1, 1995 <br /> ❑ Disapproved; See Ren-iarke <br /> i Michael Infurna,Senior RENS <br /> Remarks <br /> Site Mitigation Unit — �^ <br /> San Joaquin County _ <br /> Environmental Health Division <br /> P.O.Box 388 Date By. . <br /> Stockton,CA 95201-0385 <br /> t .Approval of these plans extends my to that <br /> Re: Langston Arco, 15615 S.Seventh St.,Lathrop,CA 95330 which is shown and described hereon but <br /> Subject: Ground Water Discharge does not authorize or approve any omission <br /> or deviation of requirements of State laws or <br /> Dear Michael, 6ocal Ordinances. <br /> i This lever is intended to be a formal request for approval to discharge filtered ground water <br /> to sanitary sewer. During excavation/remediation activities at the above referenced site <br /> ground water has been pumped from the open excavation into temporary above ground <br /> storage tanks. The stored water was then pumped through carbon canister filters into clean. <br /> epoxy lined storage tanks (see attached diagram). This filtered water has been sampled and <br /> analyzed per City of Manteca requirements for industrial waste water discharge for TPH-Gas, <br /> ` BTEX, and Lead . The attached analysis reflects this water to be non-detected for all <br /> analyzed constituents. <br /> Upon approval from City of Manteca,and City of Lathrop Public Worla Departments,Semco <br /> proposes to discharge the filtered water from the 10,000 gallon tank storage tank to sewer. <br /> Discharge tares will be monitored and regulated per city requirements. Upon discharge of the <br /> initial filtered water other stored water will be filtered,sampled,and approval for discharge <br /> will be requested on a tank by tank basis. <br /> If you should have any questions please comact me at(209) 524-9653 or by digital pager at <br /> (209)520.6625. <br /> Sincerely, <br /> D ud g Flaming, <br /> Semco <br /> i <br /> i <br /> I i <br />