WORK PLANS - Laserfiche WebLink

Home Browse Search

NAVCOM 6 30 August 1990 analyses should be conducted in this area. c) Well W-3 in the GSA area having an arsenic level of 200 ppb and p,p- DDD at 0.07 ppb. a rS,O.Gu,� d) Elevated levels of chloride, sulfate, and specific conductance were measured in piezometers and monitoring well W-18 in the Battery Acid Disposal Area. In addition, Kleinfelder recommends that a complete priority pollutant analyses be conducted initially on all newly installedells. I also recommend that this strategy be followed. P�4� 2) The two monitoring well clusters proposed for the Fire Fighting area (Area 3) are 1100 and 1500 feet upgradient (shallow zone) from the existing cluster W-1 ,2. Well W-1 had benzene @ 1200 ppb, toluene @ 5300 ppb, xylene @ 2800 ppb, and OCE @ >75000 ppb. Well W-2 had a level of vinyl chloride of 70 ppb. It is unclear what the objectives of these monitoring wells are. Additional monitoring wells, to assess the extent of contamination associated with this area, should be located downgradient from suspected sources and well cluster W-1 ,2. 3) Ground water contamination exists in the GSA Damaged Container Storage Area. Well W-3 in this area had levels of PCE, TCE, and cis-1,2 DCE at 8600, 5200 and 3800 ppb respectively. However, no additional monitoring wells are proposed for this area. The workplan should be revised to include the installation of two well clusters in this area, to determine the extent of the contamination detected in monitoring well W-3. 4) The assessment of ground water and/or soil contamination at the Battery Acid Disposal site, at the 10 Site 5 Investigation sites, and at specific landfill sites within Area 1, is apparently not an objective of this phase of the investigation. It appears the consultant intends to evaluate the hydraulic characteristics of the entire site and to identify the potential pathways for offsite migration, both surface and ground water pathways, rather than characterizing the source areas and determining plume boundaries. However, depending upon the outcome of this phase of the investigation, additional source identification and plume delineation tasks may be required. 5) The results of the underground tank program should be discussed in this report, (especially Site 5B) , including each site' potential to co taminate ground water. � , 1 pdv- � , 6) Nearby private wells should a sampled an1cOJ analyzed for t e , emi)cals of concern. /,,�,��S,-� � cit/_1 GyU'��✓l� /��,(��l 7) The surface water sampling program consists of a monthly sampling of the pump station discharge for VOCs for 6 months, and VOC sampling of five surface water locations four times for VOCs, twice during the wet season and twice during the dry season. Also, the surface water program will include continuous flow monitoring of the pump station discharge and monthly surface