Survey of features for the Casey biopile project (bioremediation of the Main Power House fuel spill), 26 February 2011

Survey conducted on 26/02/2011 to map pertinent features for the Casey biopile project (bioremediation of the MPH fuel spill) for the Contaminated Sites Group (Terrestrial and Nearshore Ecosystems) (Project 1163 (ASAC_1163) - Remediation of petroleum contaminants). Current position of quarry face also mapped at the same time at the request of Henk Brolsma (AAD Mapping Officer). Description of feature tables in 26 February combined.mdb---------------------------------------------------------Database is compiled from 3 rover files collected consecutively on 26/02/2011 (Biopile-26-02-11.ssf, Biopile-26-02-11-2.ssf, Biopile 3.ssf). Rover files collected with a Trimble ProXH receiver on a 1.5m ranging pole, and post-processed in GPS Pathfinder Office v4.20 with a base station file provided by Arko Lucieer (School of Geography and Environmental Studies, University of Tasmania) from a Leica unit mounted in the science building (with external antenna on north wall).When the quarry face was surveyed the ranging pole was held directly over the lip of the quarry. The file "BASE26-02-11.SSF" is a second base station file collected from a second ProXH receiver, mounted on a tripod over survey mark BM5, with ITRF 2000 co-ordinates as obtained from the data centre (-66 degrees 16' 55.68615", 110 degrees 31' 40.7862", 38.55 m (ITRF 2000 datum)), and an antenna height of 0.75 m. The second base station file was used in the differential correction for those points collected towards the end of the session.Lengths are in metres, Areas are in square metres and Heights are in metres above mean sea level.BedrockThese 15 points are spot heights of exposed bedrock at the base of the open excavation (areas uncovered as of the 26/02/2011). These points have since been covered with clean fill and are no longer exposed. The height of the bedrock is variable, with high unweathered ridges and lower more weathered 'leads' following a north-east/south-west orientation.Biopile - areaThese polygons mark the position of the berms used to form Biopiles 1,2 and 4.DataloggerThese two points indicate the position of two dt80 dataloggers collecting data for the Contaminated Sites Group from the upper PRB and the biopiles. The upper PRB datalogger is located on the northern wall of the concrete bund surrounding the MPH settling tank, to the west of the access stairs. The biopile datalogger is positioned on the western wall of a grey sea container positioned between Biopile 1 and the lower PRBExcavation pit - areaThis polygon marks the position of the excavated area as of 2pm on 26/02/2011. Most areas of the excavation had been backfilled with clean fill. In most cases, it was clear where the edge of the excavation was. In some areas, the boundary of the excavation was less distinct, particularly to the south near the access stairs to the MPH settling tank. The accuracy of this line will need to be verified by reference to a rover file collected on the day this area was excavated.Impermeable linerThese two line features mark the position of impermeable HDPE liner placed adjacent to the concrete conduit (site services) after the surrounding contaminated material had been excavated. Clean fill had been placed in the excavated area to hold the HDPE liner in place.Line_genericThis line marks the 'ridgeline' running along the top of biopile 4 during construction (biopile built up to 1 m height marker at the time of data collection).Other line featureLine features in this table indicate the finished ridgelines at the top of biopile 1 and 2 (circa 1.5m height). Other line features indicate the break of slope for the flattened 'pad' created for the biopiles to sit on, the edge of the rock berm on biopile 3, the 1m ridgeline on biopile 3, the mid line of the access road between the piles (known by the moniker "Golden Lane"), and the quarry face. Other point featurePoint features in this table indicate the position of 50 mm pvc valves used to switch aeration to different zones in each biopile, sumps used to pump water from each biopile, access buckets built into the rock berms which house sensors and sample access tubes, and temperature sensors buried at the nominal 1 m biopile height.PiezometerThese point features mark the position of piezometers emplaced upstream and around the lower PRB. The name attribute indicates the piezometer name (where known in the field), and whether the ranging pole had reached the base of the piezometer or was positioned at an unknown height above the base of the piezometer. PRB wingThese line features indicate the position of the impermeable 'wings' of the upper and lower PRB. The upper PRB was mapped as a distinct 'west' and 'east' wings - the gap in between is where the cage pallet (which forms the housing for the PRB) is buried. The lower PRB was mapped as one line (to save time). It is clear from the shape of the line feature where the 'east' and 'west' wings of the lower PRB are. The cages constituting the lower PRB occupy the space in between the two (the line feature travels around the downstream (northern) side of the cages). Sample access tubePoint features in this table mark the position of sample access tubes, temperature and oxygen sensors, moisture sensor tubes, and access buckets for these features. Heights refer to the depth in the biopile (0.5, or 1 m above liner base), 'edge' refers to where the relevant feature was exposed on the edge of the pile.

本数据集为2011年2月26日开展的勘测成果，旨在为凯西生物堆（biopile）项目（针对MPH燃油泄漏的生物修复工程）绘制相关特征点位，服务于污染场地工作组（陆地与近岸生态系统方向）的第1163号项目（ASAC_1163——石油污染物修复工程）。本次勘测同时应亨克·布罗尔斯马（Henk Brolsma，AAD测绘专员）的要求，一并绘制了采石工作面的当前位置。

以下为"2011年2月26日合并.mdb"中特征表的说明---------------------------------------------------------
本数据库由2011年2月26日连续采集的3台漫游车采集文件（Biopile-26-02-11.ssf、Biopile-26-02-11-2.ssf、Biopile 3.ssf）整合而成。漫游车数据由天宝（Trimble）ProXH接收机搭载1.5米测杆采集，并在GPS Pathfinder Office v4.20软件中进行后处理，所用基站文件由塔斯马尼亚大学地理与环境研究学院的阿尔科·卢西尔（Arko Lucieer）提供，该基站文件来自安装于科学楼的徕卡（Leica）接收机（外置天线设于北墙）。

当勘测采石工作面时，测杆直接架设于采石场的边缘。文件"BASE26-02-11.SSF"为另一台ProXH接收机采集的第二基站文件，该接收机架设于三脚架上，对应测量标记BM5，其坐标为来自数据中心的ITRF 2000坐标系坐标：南纬66°16′55.68615″，东经110°31′40.7862″，高程38.55米（ITRF 2000基准面），天线高度为0.75米。该第二基站文件用于本次勘测后期采集点位的差分修正。

所有长度单位为米，面积单位为平方米，高程单位为平均海平面以上高度。

基岩
共15个测点，为露天开挖基底出露基岩的实测高程（截至2011年2月26日的裸露区域）。上述点位后续已被干净覆土覆盖，不再裸露。基岩高程存在差异，沿东北-西南走向分布有未风化的高脊与风化程度更高的低缓"矿脉带"。

生物堆区域
多边形要素标记了用于构建生物堆1、2、4的护堤位置。

数据记录仪
2个测点分别标记了2台dt80型数据记录仪的位置，该设备为污染场地工作组采集数据，分别安装于上游原位反应墙（PRB）与生物堆处。上游原位反应墙数据记录仪设于MPH沉降池周边混凝土围堰的北墙，位于检修楼梯西侧。生物堆数据记录仪设于位于生物堆1与下游原位反应墙之间的灰色海运集装箱的西墙。

开挖坑区域
多边形要素标记了2011年2月26日14时的开挖区域范围。大部分开挖区域已回填干净覆土。多数区域的开挖边界清晰可辨，但部分区域边界较为模糊，尤其是在MPH沉降池检修楼梯南侧的区域。该边界线的精度需参考该区域开挖当日采集的漫游车采集文件进行核验。

防渗膜（HDPE liner）
2个线要素标记了高密度聚乙烯（HDPE）防渗膜的铺设位置，该防渗膜设于混凝土导管（场地管线）周边，铺设前已开挖移除周边受污染物料。开挖区域已回填干净覆土以固定HDPE防渗膜。

通用线要素
该线要素标记了施工期间生物堆4顶部的"脊线"（数据采集时生物堆已堆筑至1米高度标记处）。

其他线要素
本表中的线要素分别标记了生物堆1、2顶部的完工脊线（约1.5米高度）、生物堆基座平整平台的边坡拐点、生物堆3的岩质护堤边缘、生物堆3的1米高度脊线、生物堆之间检修道路的中线（俗称"黄金通道"）以及采石工作面。

其他点要素
本表中的点要素分别标记了用于切换各生物堆曝气区域的50mm聚氯乙烯（PVC）阀门、用于抽取各生物堆积水的集水井、设于岩质护堤内用于安装传感器与采样管的检修桶，以及埋设于生物堆标称1米高度处的温度传感器。

渗压计
点要素标记了上游及下游原位反应墙周边布设的渗压计位置。名称属性字段标注了渗压计名称（野外已知的情况下），以及测杆是否抵至渗压计基底，还是架设于渗压计基底上方的未知高度处。

原位反应墙翼部（PRB wing）
线要素标记了上游与下游原位反应墙的防渗"翼部"位置。上游原位反应墙被划分为独立的"西翼"与"东翼"，二者之间的间隙为原位反应墙支撑托盘（用于容纳原位反应墙）的掩埋区域。为节省时间，下游原位反应墙仅以一条线要素绘制，但从该线要素的形状可清晰分辨其东、西翼的位置。下游原位反应墙的支撑托盘位于两条翼部之间（线要素沿托盘下游（北侧）边缘布设）。

采样管
本表中的点要素标记了采样管、温度与氧气传感器、湿度传感器管以及上述设施的检修桶的位置。高程值指生物堆内的埋深（位于防渗膜基底以上0.5米或1米处），"edge"字段表示相关设施暴露于生物堆边缘位置。