Laserfiche WebLink
1. M. KLEINFELDER & ASSOCIATES <br /> File: S-1008-21/12:337 <br /> Revised: July 8, 1986 <br /> Page 7 <br /> The above compatibility rating does not consider <br /> absorption/adsorption of contaminants onto or into the pVC <br /> Polymer matrix and the potential for-. leadfnq solvents and certain <br /> heavy metals from the PVC into the ground water samples. These* <br /> concerns have been raised and documented to occur under <br /> laboratory conditions, but to date, there are few data <br /> documenting these effects in the field. It is the dominant <br /> consensus that under low organic contamination conditions, <br /> sufficient purging and proper sampling and decontamination <br /> procedures should eliminate the introduction of sample bias. <br /> The potential contaminant of concern at the Harney Lane <br /> Landfill is typical non-hazardous landfill leachate; <br /> characterized by high-dissolved solids and slightly acidic <br /> conditions. Monitoring over the last four years at the site <br /> appears to substantiate a Regional Board conclusion that the <br /> probability f the landfill causing degradation r <br /> wateround <br /> Is i 1y remote. None of the wellsfor <br /> monitoring have shown any indication of <br /> ground <br /> In addition, there is no reason at this time wator suspectthepresence of any hazardous organic contaminates in the waste which <br /> would justify concern for the use of PVC as a monitoring well <br /> material. Therefore, the monitoring well at these facilities <br /> will employ PVC casing. <br /> WATER QUALITY SAMPLING <br /> Cross contamination of samples can occur if proper equipment <br /> techniques and procedures are not followed, particularly when a <br /> single pump is used. Therefore, to prevent <br /> ntial <br /> contamination of samples and to facilitate collection ofwatersamples on a long term basis, it is proposed that electric <br /> submersible pumps be installed in the wells. There are a number <br /> of economically available pumps for dedicated installation. The <br /> Pump diameter should be in the 3- to 4-1nch range and be capable <br /> of a minimum 6 gal/min flow from loo feet. A dedicated pump, <br /> such as a Brainard/Kllman TriLac Float Pump, a QED Well Wizard, <br /> or equivalent, should be used. Actual pump selection will be <br /> made during the monitoring well installation phase. The pumps <br /> can be set up for direct on-demand electrical connection or <br /> equipped with plug fixtures for use with a portable electric <br /> generator. <br /> f'Y�� <br />