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WOW <br /> Mike Infurna [EH] <br /> From: Mike Infurna [EH] <br /> Sent: Friday, May 16, 2003 3:29 PM <br /> To: jzilles@kleinfelder.com' <br /> Subject: 1444 Mariposa-Septic system <br /> hiya Joe. <br /> Mike Huggins came to me with questions on the 'sludge' (?)sample analyses you faxed to him....... <br /> County ordinance does not allow for industrial, hazardous materials, etc to enter a septic system..Systems that have <br /> detectable concentrations of these kind of substances require further investigation once we know about them. System is to <br /> stay OFF-LINE until this is cleared up...Any more'flushing'or showers or etc can potentially move any contaminant further <br /> down the lines...once down the pit, groundwater investigations typically get involved and you know what THAT does to any <br /> simple investigation. <br /> We (EHD)have contracted with State EPA to investigate and oversight on these"Underground Injection Control" (UIC) <br /> sites...Margaret Lagorio and I handle them..And Margaret says I will be handling THIS one .. <br /> Since we know about it, it's gotta be handled before it goes away..Here's what you'll need to get started. <br /> a MFR form for you/landowner/responsible party to complete, sign, and return to EHD with a prepayment of$267 (3-hours <br /> credit @$89 per)to start an account. <br /> EPA UIC guidelines require sampling of, characterization of, and proper disposal of the liquid stuff in the septic tank. <br /> Typically, based on the impact of the contents, the tank must be flushed as many times as needed to ensure decon, <br /> collect and characterize the rinsate, and EHD is to VISUALLY inspect the inside of the tank for condition before re use. <br /> Cracked, deteriorated, poor shape of tanks could mean removal (under EHD permit)and replacement. <br /> If tank is ok, but pump out stuff is contam'd, then EPA again wants soil sampling under critical points (tank, d-box)as well <br /> as EVERY 20 linear feet of leach lines just below the rock in first native soil..Hand augers work well here...with line(s) <br /> located, a 45 degree angle and slide hammer with brass sleeves to intersect the native DIRECTLY below the leach lines <br /> usually works...another approach is to use a bobcat/backhoe to trench very-next to the line, expose the line, gravel/rock, <br /> and horizontally slide hammer a soil sample directly under the line.... <br /> You can approach this thing with a 'find out'quickly angle....two quick soil samples...one under the first outlet of the tank, <br /> and another at the end of the leach Iine..IF they're screaming hot, you got a big problem...may wanna regroup and just <br /> plan on destroying the system and o/ex til it's nd...let me know.. <br /> With pits, I STRONGLY recommend a soil and any liquid/sludge sample at the end of the leach line BEFORE it enters the <br /> pit...could save you sampling the BOTTOM of the pit if non detect at acceptable QA/QC... <br /> Evaluation of the soils and tank will provide info in determining IF the system can be re-use or removed and replaced... <br /> I'll need a work plan (narrative)describing how,where,with what, EPA Methods for close to Waste Oil protocol, and a site <br /> map, septic system design info, the$267 check+ MFR, and a boring permit application (enclosed)and $89 check with it.... <br /> call me if questions...468-3454. <br />